CN110752679A - Control method of electromagnetic emission device and electromagnetic emission device - Google Patents

Abstract

The invention discloses a control method of an electromagnetic transmitting device and an electromagnetic transmitting device. The method comprises: a detection step and a recognition step, wherein the detection step is: detecting whether there is a conductor; The step of identifying and judging is: identifying whether there is a power requirement, if there is a power requirement, the transmitting coil works in a power requirement state; if there is no power requirement, the transmitting coil works in a first power state; the first power state is: work with a fixed power value , or operate at progressively increased power. The control method of the electromagnetic transmitting device of the present invention can detect whether there is a conductor, and adjust the working power of the coil according to whether the conductor has the required power. The electromagnetic transmitting device using the method can meet the two requirements of charging and heating at the same time, and the use position is not limited.

Description

Control method of electromagnetic emission device and electromagnetic emission device

technical field

The present invention relates to the field of electromagnetic technology, and in particular, to a control method of an electromagnetic transmitting device and an electromagnetic transmitting device.

Background technique

Nowadays, the types of electrical appliances are becoming more and more abundant, and the use of them is becoming more and more convenient.

Such as induction cooker, it is convenient and quick to use, and it is safer than using gas. Some restaurants also embed the induction cooker into the dining table, which is convenient for use.

As we all know, the heating principle of an induction cooker is similar to the wireless charging principle of electronic devices. Therefore, there are devices in the prior art that combine an induction cooker with a charging stand, generally a table. For example, some restaurants use an induction cooker embedded in the table, and also embedded Wireless charging stand, wireless charging for the collection.

But in this product, the induction cooker and the charging stand are additionally embedded on the table, which are actually two separate products. The two cannot be mixed. Whether it is a pot that needs to be heated by an induction cooker or a mobile phone that needs to be charged, it can only be placed in a fixed area.

SUMMARY OF THE INVENTION

The present invention hopes to provide a control method of a magnetic wave transmitting device and an electromagnetic transmitting device, which can realize the free use of various devices. The working power can be changed according to different equipment.

The control method of the electromagnetic transmitting device of the present invention includes: a detection step and a recognition step, wherein the detection step is: detecting whether there is a conductor, entering the recognition step if there is a conductor, and continuing the detection step if not; the recognition step To determine whether there is a power requirement, if there is a power requirement, the transmitting coil works in a power requirement state; if there is no power requirement, the transmitting coil operates in a first power state; the first power state is: working at a fixed power value, or Operates with gradually increasing power.

Preferably, the identifying step is divided into: identifying step and judging step; the identifying step is: detecting whether the conductor has a response signal, entering the judging step if there is the response signal, and transmitting the coil without the response signal Working in the first power state; the judging step is: judging the validity of the response signal, and the effective response signal includes a power requirement; when judging that the response signal is valid, the transmitting coil works in a power requirement state; when When it is determined that the response signal is invalid, the transmitting coil operates in the first power state.

Preferably, in the detection step, if a moving conductor is detected, all the transmitting coils in the moving path of the conductor are formed into a coil set; within the range of the coil set, it is determined whether there is a power requirement, If there is a power requirement, the transmitting coil works in a power requirement state; if there is no power requirement, the transmitting coil works in the first power state.

Preferably, in the detection step, if a moving conductor is detected, all the transmitting coils in the moving path of the conductor are formed into a coil set; within the range of the coil set, it is determined whether there is a power requirement, If there is a power requirement, the transmitting coil works in a power requirement state; if there is no power requirement, it returns to the detection step.

Preferably, the method further includes: a confirming step; before the transmitting coil works in the first power state again, a confirming step is performed first, and the confirming step is: sending a confirmation prompt and waiting for a confirmation reply, after obtaining the confirmation reply, all the The transmitting coil works again in the first power state; if the confirmation reply is not received, the transmitting coil maintains the original working power.

Preferably, when the transmitting coil works in the first power state, there is also a power estimation step, and the power estimation step is: judging the position of the conductor, the corresponding number of the transmitting coils, the greater the number of the corresponding transmitting coils, The larger the estimated power value is, and vice versa, the smaller is; in the first power state, the estimated power value is used to work with the maximum power value.

Preferably, when the transmitting coil is working in a power requirement state, it is also judged whether there is a power requirement from time to time, and the power is adjusted according to the change of the power requirement.

Preferably, when the transmitting coil works in the first power state or in the power requirement state, the indicator light at the corresponding position of the electromagnetic transmitting device is lit; there are buttons, which are arranged on the top layer and are connected with all the The controller is electrically connected.

The electromagnetic emission device of the present invention comprises a top layer, a working layer and a base layer arranged in sequence, and is characterized in that:

The working layer has: a transmitting coil and a controller; the transmitting coil has a plurality of them, which are respectively electrically connected to the controller; the transmitting coil is used for electromagnetic induction; the controller is used for receiving electricity from the transmitting coil; An electrical signal is obtained from magnetic induction to determine whether there is a conductor and whether the conductor has a power requirement, and the controller is also used to control the power of the transmitting coil.

Preferably, there is also a signal light, the signal light is arranged on the top layer or the working layer, and is electrically connected to the controller, and is controlled by the controller to turn on or off.

The control method of the electromagnetic transmitting device of the present invention can detect whether there is a conductor, and adjust the working power of the coil according to whether the conductor has the required power. For example, when a mobile phone that supports wireless charging is placed on an electromagnetic transmitting device, the required power from the mobile phone is used to control the coil to work at the corresponding power to realize the charging of the mobile phone. When no power requirement is detected, it may be a pot, a water cup, etc., and the coil works at a fixed power or gradually increases the power to heat the pot, water cup, etc.

The electromagnetic transmitting device using the method can meet the two requirements of charging and heating at the same time, and the use position is not limited.

Description of drawings

Fig. 1 is the flow chart of the control method of the electromagnetic launch device of the present invention;

FIG. 2 is a flowchart of an embodiment of a control method for an electromagnetic transmitting device of the present invention;

Fig. 3 is the explosion schematic diagram of the electromagnetic launch device of the present invention;

FIG. 4 is a schematic diagram of a detection device in the electromagnetic emission device of the present invention.

Reference number:

Top layer 1; working layer 2; base layer 3; transmitting coil 41; controller 42; button 5; transmitting part 63; receiving part 65;

Detailed ways

The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, but not to be construed as a limitation of the present invention.

The present invention provides a control method of an electromagnetic transmitting device. Referring to FIG. 1 , it mainly includes a detection step S10 and a recognition step S20. The detection step S10 is used to detect whether there is a conductor, such as a mobile phone that needs to be charged, or a water cup that needs to be heated. Of course, the water cup here needs to be specially limited, and it needs to be a metal water cup, or a metal layer is provided on the side wall and bottom wall of the water cup. The identification step S20 is used to determine at what power the transmitting coil operates.

For the mobile phone that needs to be charged, the electromagnetic transmitting device uses electromagnetic waves to charge it wirelessly; for the water cup that needs to be heated, the electromagnetic transmitting device uses electromagnetic waves to heat it, the principle is the same as that of the induction cooker heating pot and other cookers.

The method of the present invention will be specifically described below.

Referring to FIG. 1 , the detection step S10 is: to detect whether there is a conductor, if there is a conductor, enter the identification step, if not, continue to keep the detection step S10 . In this step, there may be various methods for detecting the presence or absence of the conductor. For example, the detection can be carried out directly using the coil in the electromagnetic transmission device. Generally, the transmitting coil in the detection step S10 is in a low power consumption standby state. The transmitting coil itself will have a fixed (stable) electrical parameter, and once a conductor is put in, the conductor will affect the original electrical parameters of the transmitting coil, causing the electrical parameters of the transmitting coil to change. Also, according to the number of coils whose electrical parameters are changed, the approximate size of the conductor can be obtained. Likewise, the position of the conductor can be determined based on the position of the coil that has changed. Note that the conductor needs to be close to the coil when detecting through the coil. In actual detection, for example, parameters such as impedance and inductance of the transmitting coil can be detected. It should be noted that the standby is not a shutdown, but a low power consumption state, which may not transmit electromagnetic waves to the outside, but does not affect the measurement of the electrical parameters of the transmitting coil.

In the electromagnetic transmitting device corresponding to the present invention, there will be a plurality of transmitting coils, and each transmitting coil may be in the above-mentioned detection step S10 to judge in real time whether a conductor enters. In addition, even if some of the transmitting coils are already in working state, such as charging a mobile phone or heating a water cup, the rest of the transmitting coils that have not been charged or heated can still be in the detection step S10, so as to perform subsequent tests on the devices that are put in. detection.

In addition, the detection step S10 can be implemented by other means besides using the transmitting coil, for example, by using a camera to identify the type of the device. For example, through camera imaging, it is recognized that a mobile phone is placed in a certain area of the electromagnetic emission device, and then the corresponding "conductor presence" identification is made. Or it can be done directly by manual input.

In the following description of the electromagnetic transmitting device, this application will describe an embodiment capable of detecting conductors.

The identifying step S20 is mainly to identify whether the conductor detected in the previous step has a power requirement. For example, the conductor is a mobile phone, which has specified wireless charging requirements. This requirement includes power requirements. If it is recognized that the conductor has similar power requirements, the transmitting coil will work according to the power requirements. For example, the conductor is a device that does not need to be charged, such as a pot, and the power required for charging is not specified, and the feedback of the power requirement is not performed. At this time, the coil works in the first power state. The first power state is: working with a fixed power value or working with a gradually increasing power.

It should be noted that the above-mentioned pots and other devices that do not have charging requirements do not require power. They are only conventional examples for easy understanding, and do not rule out that some specific pots and water cups have power requirements. For example, a thermal water cup, in order to heat the water to a suitable problem, the device can completely have a power requirement to specify the power and achieve the effect of thermal insulation. Without considering the cost, all devices can be equipped with corresponding units, such as units and receiving coils, to realize the communication of power requirements.

For the recognition of power requirements, or the feedback of received power requirements, the receiving source can also be the transmitting coil. Taking a mobile phone as an example, it will inevitably have a receiving coil corresponding to the transmitting coil, a wireless charging chip of the mobile phone, or other chips, which transmit power requirements between the receiving coil and the transmitting coil in the form of electrical signals (although it is called a transmitting coil). , but also has the function of receiving electrical signals. Similarly, the receiving coil also has the function of transmitting electrical signals, which is the basic principle of electromagnetic induction, and will not be repeated in this application).

The recognition of the above power requirements can be understood as the communication between the electromagnetic transmitting device and the charged device (mobile phone, watch, etc.) during charging, and the power requirements are transmitted in the form of electrical signals. For example, messages are transmitted through pulse signals. The pulse signals are distinguished according to their lengths. By encoding the long and short pulse signals in a binary manner, information transmission can be realized.

Of course, using the communication of the receiving coils corresponding to the transmitting coils to realize the transmission of power requirements is a preferred implementation manner, and is not intended to limit the present application. Other communication methods, such as setting up a bluetooth signal transceiver, communicate power requirements through bluetooth. Another example is realized through NFC near field communication, just when wireless charging, the electromagnetic transmitting device and the charged device need to be close. Of course, in some embodiments, it can even be set manually, for example, after the conductor is detected, a power requirement signal is manually input to make the coil work according to the power. The artificial power requirement signal can be the control button set on the electromagnetic transmitting device, and the power of the transmitting coil can be controlled by manual selection with reference to the power adjustment button of the electromagnetic cooker.

The details of the identifying step S20 will be specifically described below.

Referring to FIG. 2 , the identifying step S20 is divided into: identifying step S21 and judging step S22.

The identifying step S21 is: detecting whether the conductor has a response signal, and entering the determining step S22 if the response signal is present, and the transmitting coil operates in the first power state without the response signal. For example, the conductor is a device that does not need to be charged, such as a water cup, so there will be no response signal, and the transmitting coil works in the first power state. When the conductor is a mobile phone, there will be a response signal.

The judging step S22 is: judging the validity of the response signal, and the valid response signal includes a power requirement; when judging that the response signal is valid, the transmitting coil operates in a power requirement state; when judging that the response signal is invalid, The transmit coil operates in a first power state.

The judgment of the validity of the response signal here is to verify whether the signal responded by the conductor is the signal required for charging. For example, the above-mentioned volume uses pulse signals for communication. There are many kinds of devices that can send pulse signals, and not all of them need to be charged. Therefore, it is necessary to further verify the validity of the response signal.

In the identification step S21, the transmitting coil can be used as a device for receiving the response signal, and the transmitting coil can also send a signal to the device. Especially when charging, it may be necessary to communicate between the two parties (the charging base and the charged mobile phone), and then there is the communication, and then the transmission and reception of the response signal. That is to say, in the identifying step S21, a signal may be sent first, and then a response signal may be received. Generally, the transmitting coil will send an identification signal first, and the identification signal may contain an inquiry about charging or heating, or other relevant information. Regarding charging usage, it can be set according to the requirements related to wireless charging related protocols, such as Qi standard, PMA standard, A4WP standard and so on. The protocol-related requirements mentioned here only express the identification signal sent by the transmitting coil and the information content that may be included in the received response signal, and do not limit the structure of the transmitting coil of this application, which is set to the required structure in the above-mentioned standards. .

Further, in order to improve security, the present application further includes: confirming step S30.

Confirm step S30 before the transmitting coil works in the first power state again. It can be known from the above that the first power state operation is entered by judging whether there is a power requirement. For conductors of non-charging devices, basically, the transmitting coil can be brought into the first power state to work. Like pots, water cups, etc., in order to achieve heating, of course, they need the transmitting coil to enter the first power state to work, and for items that are mistakenly placed within the range of the transmitting coil, such as keys, credit cards, etc., they do not need to be charged, let alone. Heating is required, and heating can even be dangerous.

Therefore, in order to improve safety, a memory confirmation step S30 is required. The confirmation step S30 is: sending a confirmation prompt and waiting for a confirmation reply. After the confirmation reply is obtained, the transmitting coil works in the first power state again; if the confirmation reply is not received, The transmitting coil maintains the original working power.

The way to reply is generally to use manual reply. No matter whether the detected conductor needs to be heated or not, as long as the above steps are followed, the transmitting coil will enter the first power state and will make a judgment. For example, set the corresponding button, touch point, etc. on the electromagnetic transmitting device, and send a confirmation prompt can be Sound, light, etc., and then manually press buttons, touch points, etc., to give feedback to achieve confirmation and reply, and the transmitting coil will work in the first power state.

In addition to manual reply, a specific reply unit, such as a pulse transmitter, can also be set on the equipment that requires the transmitting coil to enter the first power state. After receiving the confirmation prompt, it will automatically reply and automatically enter the follow-up work.

When the transmitting coil is working in the state of power requirement, it is also judged whether there is a power requirement from time to time, and the power is adjusted according to the change of the power requirement. For example, when charging a mobile phone, with the change of the charging amount, the power requirements of the mobile phone for charging will also change accordingly. In order to ensure that the changed power requirements are met, the transmitting coil needs to adjust the power.

Therefore, it is necessary to judge whether there is a power requirement from time to time. Through the above, the transmitting coil and the receiving coil are generally used for communication, so as to realize the communication with high power requirements. Since the transmitting coil itself needs to work all the time when charging, it is more convenient to detect whether there is a power requirement from time to time. Adjust the power of its own work according to the power requirements, which is convenient and fast, and can also meet the charging needs.

For some equipment that needs to be heated, it can also be applied, such as a heat preservation kettle, which needs to keep the water at a constant temperature. After it detects that the water temperature is low, it will send a power request, and the transmitting coil adjusts the working power according to the power request to efficiently The water in the thermal kettle is heated to a predetermined temperature. After the water temperature reaches the predetermined temperature, the thermal insulation kettle will send a power request to reduce the power, and the transmitting coil reduces the power according to the power requirements, so that the water in the thermal insulation kettle is kept in a thermal insulation state.

It can be seen from the above that the power requirement is not only available during charging, but also can have power requirement during heating.

A case in which the detected conductor may move will be described below.

For example, when charging a mouse in use, the mouse will move from time to time. If each time the mouse moves, the transmitting coil at the corresponding position will recycle from the detection step S10, which will affect the charging efficiency. For another example, when charging a mobile phone, a message is called into the mobile phone. After picking up the mobile phone for processing, and then putting it back to charge, it is necessary to start the cycle from the detection step S10 again. These will result in reduced efficiency.

In order to improve the charging efficiency, the present application reports a method suitable for moving conductors.

In the detection step S10, if a moving conductor is detected, all the transmitting coils in the moving path of the conductor are formed into a coil set; within the range of the coil set, it is determined whether there is a power requirement, and if there is a power requirement The transmitting coil works in a power demand state; if there is no power demand, the transmitting coil works in the first power state.

For example, when charging the mouse, first use the mouse to slide on the electromagnetic transmitting device, circle a range that may be used, and then place the mouse in this range, and the transmitting coils within this range form a coil set. Of course, the set of coils here is defined manually, not these transmitter coils are physically changed.

When the mouse is within this range, continue to identify step S20. Generally, if the mouse supports wireless charging, it will send the corresponding power requirements. At this time, all the transmitting coils in the coil set work according to the power requirements, so that , no matter where the mouse moves, it can continue to charge.

In some embodiments, for safety consideration, within the range of the coil set, it is determined whether there is a power requirement, and if there is no power requirement, the process returns to the detection step S10. This is to avoid excessive power when working in the first power state when false power is required. Once other conductors enter the range of the coil set, damage or other dangers may occur.

In addition, in some embodiments, when the transmitting coil works in the first power state, there is also a power estimation step, and the power estimation step is: judging the position of the conductor, the number of the corresponding transmitting coils, the greater the number of the corresponding transmitting coils , the estimated power value is larger, and vice versa is smaller; in the first power state, the estimated power value is used to work at the maximum power value.

For example, the conductor has a water cup and a pot, the position of the pot is located, the number of corresponding transmitting coils is large, and the corresponding number of water cups is small. Therefore, the power of the transmitting coil corresponding to the pot will be large, and the power of the water cup will be small. In this way, more energy is available for the pot to generate heat, such as when it is used to boil water for cooking, which is faster and more efficient. For water cups, heating water, or keeping water warm, requires little energy, so lower power can also be achieved.

The estimated power is generally 20W-2000W. The reason for the large span is because of different functions. 20W can be used to keep the water in the water cup warm, and 2000W may be used for cooking, cooking, etc.

In a preferred embodiment, when the transmitting coil works in the first power state or in the power requirement state, the indicator light at the corresponding position of the electromagnetic transmitting device is lit. The indicator light can prompt the user that the transmitter coil at the corresponding position is working. Further, according to the different working power of the transmitting coil, the color of the indicator light changes accordingly.

A complete example is given to illustrate the method of the present invention. In this example, the components that realize functions such as detection all use transmitting coils.

In the detection step S10, each transmitting coil is in a low power consumption standby detection state, and it is detected whether there is a conductor on the transmitting coil.

The identification step S20 is divided into two parts, the identification step S21 and the determination step S22. After it is detected whether there is a conductor on the transmitting coil, to be precise, the identification step S21 is entered.

In the identification step S21, the transmitting coil sends an identification signal and waits for whether the identified conductor has a response signal. If there is, go to the judgment step S22 to judge the validity of the response signal, if it is valid, adjust the power of the transmitting coil according to the power requirement in the response signal, and work in the power requirement state. If there is no response signal, or the response signal is invalid, enter the confirmation step S30. If the confirmation step S30 is entered, a confirmation prompt is sent first, and a confirmation reply is waited. After the confirmation reply is obtained, the transmitting coil operates at the first power state; if the confirmation reply is not received, the transmitting coil maintains the original working power.

Through the above-mentioned method of the present invention, the electromagnetic transmitting device can automatically judge the working power of the transmitting coil. Especially for the distinction between charging and heating, although the principles of the two are the same, for products such as pots and water cups, even if they do not have communication chips or coils installed, they can also achieve "on-the-go", that is, like frying. Pots and steamers that do not have chips and coils installed are placed on the electromagnetic transmitting equipment, and the transmitting coils at the corresponding positions can be aligned and heated through the above method steps.

For a device without a communication function, the present application can at least automatically achieve heating it. Automatic charging can also be achieved when charging power is not required.

Next, the electromagnetic emission device of the present invention will be described. The electromagnetic transmitting device is suitable for the above-mentioned control method.

Referring to FIG. 3 , the electromagnetic emission device includes a top layer 1 , a working layer 2 and a base layer 3 arranged in sequence. The working layer 2 has: a transmitter coil 41 and a controller 42; there are multiple transmitter coils 41, which are respectively electrically connected to the controller 42; the transmitter coil 41 is used for electromagnetic induction; the controller 42 is used for electromagnetic induction from the transmitter coil 41 The electrical signal is obtained in the , for judging whether there is a conductor and whether the conductor has a power requirement, and the controller 42 is also used for controlling the power of the transmitting coil 41 .

The electromagnetic emitting device of the present invention can preferably be used as a table, and the top layer 1 is used as the top surface of the table, which can be a heat-resistant insulator such as glass and ceramics. The working layer 2 is the internal circuit structure and so on. The base layer 3 is the plane carrying the working layer 2 . The top layer 1, the working layer 2 and the base layer 3 can be combined to form the structure of the table top. The fixation between the top layer 1 and the working layer 2 should be relatively firm to avoid placing heavy objects on the desktop to affect the use. The base layer 3 is generally also used as a shielding layer, for example, an aluminum plate is selected to shield the electromagnetic waves below.

The table can be used for a variety of purposes, such as cooking (heating a pot), boiling water (heating a kettle), and charging electronic devices.

The table is just one example, it can also be a completely new device with both charging and heating functions. By installing it on the kitchen stove, it can replace the gas stove. At the same time, it can also cancel the socket reservation of electric equipment such as rice cookers and kettles. Of course, these devices need to support wireless charging.

Preferably, the electromagnetic emission device also has a signal lamp, which is arranged on the top layer 1 or the working layer 2 and is electrically connected to the controller 42, and the controller 42 controls it to turn on or off.

In addition, a manually operated button 5 may also be provided, and the button 5 is arranged on the top layer and is electrically connected to the controller. The key 5 may include an on-off key, a power adjustment key, and the like. Compared with the above method, the power adjustment button has a higher priority for adjusting the power of the transmitting coil.

Referring to FIG. 3 , it can be seen that in the electromagnetic transmitting device, the transmitting coil 41 may have various sizes and arrangements. Of course, it can also be set in the way of regular arrangement of the same size.

Those skilled in the art should be able to understand the setting manner and working manner of the transmitting coil 41 . For example, the transmitting coil 41 is equivalent to an inductance, and a capacitor may be connected in series or in parallel outside the coil 41, and there will also be a corresponding power input and so on.

Finally, a structure that may be used for the detection in the detection step S10 is described. The structure can be arranged between the working part 2 and the top layer 1 of the electromagnetic emission device. For convenience of description, it is called a detection structure.

Referring to FIG. 4 , the detection device mainly includes a transmission part, a transmission part 63 and a reception part 65 . Both the transmitting unit 63 and the receiving unit 65 are electrically connected to the controller 42 and are controlled by the controller 42 to exchange information.

The transmission part has a plurality of transmission units, the transmitting part 63 is used to excite the transmission unit to generate electromagnetic induction, and the receiving part 65 is used to receive the electromagnetic induction signal of the transmission unit. The main working principle of the detection device is summarized as follows: electromagnetic induction occurs between the transmission units. When a conductor enters, the stability of the electromagnetic induction is affected, and the change of the electrical signal in the electromagnetic induction can be detected to determine whether the conductor enters.

The transmission unit may have various forms, and the resonance unit 611 is preferably used as the transmission unit in this application. Because the resonant unit 611 is easier to obtain and relatively simple to manufacture, it is more suitable for industrial manufacturing.

The transmission part mainly realizes the electromagnetic induction effect through the resonance (resonance) between the respective resonance units 611 . The resonance unit 611 will be specifically described below. There are multiple resonance units 611 , and the position of each resonance unit 611 is configured to generate electromagnetic induction with at least one other resonance unit 611 . Taking at least one resonance unit 611 as the starting unit and at least one resonance unit 611 as the ending unit, the transmitting unit 63 makes the starting unit generate electromagnetic induction, and the receiving unit 65 detects the electromagnetic induction of the ending unit. Corresponding electrical signals can be obtained. The start unit and the end unit may be the same resonance unit 611 , or may be different resonance units 611 . It is mentioned here that "electromagnetic induction occurs with at least one other resonance unit 611", and its final effect is to realize a complete induction loop. Can be transferred to the end unit. In an induction loop, only two resonance units 611 may be included, and one of the two resonance units 611 is a start unit and the other is an end unit.

Each resonance unit 611 has a ring structure, and an opening portion is formed on the ring structure; the ring structure is conductive to form an inductance L; the opening portion forms a capacitor C. If the opening part is used to form the capacitor C, the part can meet the performance requirements. If the frequency cannot be satisfied, a supplementary capacitor can be added in the opening part, for example, the compensation capacitor can be added in the form of welding.

Alternatively, each resonance unit 611 has a ring structure, and on the ring structure, at least a section of insulating medium is formed; the ring structure is conductive to form an inductance L; the insulating medium forms a capacitor C. The insulating material is not wrapped around the metal ring, but is a part of the annular structure, that is, the annular structure includes at least a section of insulating material. The insulating medium can also directly use a capacitor, which is connected to the metal ring. In practical applications, it can also be configured into more shapes, such as a mouth shape, a spiral shape, an Ω-shaped structure, a U-shaped structure, a dendritic structure, and the like.

Through the above detection device, the detection of the conductor is realized.

The structure, features and effects of the present invention have been described in detail above according to the embodiments shown in the drawings. The above are only the preferred embodiments of the present invention, but the scope of the present invention is not limited by the drawings. Changes made to the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, shall fall within the protection scope of the present invention as long as they do not exceed the spirit covered by the description and drawings.

Claims (10)

1. a control method of electromagnetic emission equipment, is characterized in that, comprises: detection step and identification step, wherein, The detection step is: to detect whether there is a conductor, if there is, enter the identification step, if not, continue to maintain the detection step; The identifying step is: identifying whether there is a power requirement, if there is a power requirement, the transmitting coil works in a power requirement state; if there is no power requirement, the transmitting coil operates in a first power state; The first power state is: working with a fixed power value or working with a gradually increasing power. 2. The control method of an electromagnetic transmitting device according to claim 1, wherein, The identifying step is divided into: identifying step and judging step; The identifying step is: detecting whether the conductor has a response signal, entering the judging step if the response signal is present, and the transmitting coil works in a first power state without the response signal; The judging step is: judging the validity of the response signal, and the valid response signal includes a power requirement; When judging that the response signal is valid, the transmitting coil works in a power requirement state; When it is determined that the response signal is invalid, the transmitting coil operates in the first power state. 3. The control method of electromagnetic transmitting device according to claim 1, is characterized in that, In the detecting step, if a moving conductor is detected, all the transmitting coils in the moving path of the conductor are formed into a coil set; Within the range of the set of coils, it is determined whether there is a power requirement, and if there is a power requirement, the transmitting coil operates in a power requirement state; if there is no power requirement, the transmitting coil operates in a first power state. 4. The control method of an electromagnetic transmitting device according to claim 1, wherein, In the detecting step, if a moving conductor is detected, all the transmitting coils in the moving path of the conductor are formed into a coil set; Within the range of the set of coils, it is determined whether there is a power requirement, and if there is a power requirement, the transmitting coil works in a power requirement state; if there is no power requirement, it returns to the detection step. 5. The control method of an electromagnetic transmitting device according to any one of claims 1-4, wherein, Also includes: confirmation step; Before the transmitting coil works in the first power state again, a confirmation step is performed first. The confirmation step is: sending a confirmation prompt and waiting for a confirmation reply. After the confirmation reply is obtained, the transmitting coil is in the first power state again. Work; if the confirmation reply is not received, the transmitting coil maintains the original working power. 6. The control method of an electromagnetic transmitting device according to any one of claims 1-4, wherein, When the transmitting coil works in the first power state, it also has a power estimation step, and the power estimation step is: judging the position of the conductor, the corresponding number of the transmitting coils, the larger the number of the corresponding transmitting coils, the estimation. The larger the power value, the smaller the vice versa; In the first power state, the estimated power value is operated at the maximum power value. 7. The control method of an electromagnetic transmitting device according to any one of claims 1-4, wherein, When the transmitting coil is working in the state of power requirement, it is also judged whether there is a power requirement from time to time, and the power is adjusted according to the change of the power requirement. 8. The control method of an electromagnetic transmitting device according to any one of claims 1-4, wherein, When the transmitting coil works in the first power state or in the power requirement state, the indicator light at the corresponding position of the electromagnetic transmitting device is lit. 9. An electromagnetic emission device suitable for the control method of any one of the described electromagnetic emission devices in claims 1-8, comprising a top layer (1), a working layer (2) and a base layer (3) arranged in sequence, wherein is, The working layer (2) is provided with: a transmitting coil (41) and a controller (42); There are multiple transmitting coils (41), which are respectively electrically connected to the controller (42); The transmitting coil (41) is used for electromagnetic induction; The controller (42) is used for obtaining an electrical signal from the electromagnetic induction of the transmitting coil (41), for judging whether there is a conductor and whether the conductor has a power requirement, and the controller (42) is also used for controlling all the power of the transmitting coil (41). 10. The electromagnetic transmitting device according to claim 9, characterized in that, There is also a signal light, the signal light is arranged on the top layer (1) or the working layer (2), and is electrically connected with the controller (42), and is controlled by the controller (42) to turn on or off; There is also a button (5), the button (5) is arranged on the top layer (1), and is electrically connected with the controller (42).

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