CN105411037B - A kind of shatter-resistant protects system - Google Patents

Abstract

The present invention proposes an anti-fall protection system, which utilizes plantar pressure and attitude sensors to jointly predict the fall state and fall direction, and quickly inflates the corresponding airbag after confirming that the user is in the process of falling. The inflatable airbag is divided into the main inflation pipeline, the auxiliary inflation pipeline and the rest of the airbag. The air pressure and inflation speed of the main inflation pipeline are given priority to achieve the main force support. In order to increase the inflation speed, multiple high-pressure small gas cylinders can Inflation is carried out, and the start of the inflation process is controlled by an electromagnetic inflation valve. In the order of inflation, instead of uniformly inflating the entire space, the airbags are divided into different levels of inflatable channels, first inflating the important channel space, then inflating the secondary channel space, and finally inflating the rest of the airbag Partial inflation, so that the key parts are protected first, and then other parts are protected, reducing the adverse effects that may occur when the inflation speed is not enough.

Description

A fall protection system

technical field

The patent of the present invention belongs to the field of portable electronic anti-fall protection system, and specifically relates to an anti-fall protection system that protects people when they fall while walking.

Background technique

Falls are the second leading cause of accidental injury death in the world, and how to prevent falls has become the key to protecting the lives of the elderly. The prior art mainly realizes the fall alarm function, which only realizes the alarm function after the human body falls. At the same time, there are also a few studies trying to realize the prediction of falls and the prediction of falling posture through multi-modal sensors including three-axis accelerometers, three-axis gyroscopes, and three-axis magnetometers. This patent will use the plantar pressure sensor and attitude sensor to predict the fall, starting from the essence of the fall, that is, the state of the feet off the ground, the rotation of the body, the sinking speed and acceleration of the body and other indicators as the fall basis for prediction.

Among the inflatable airbags, the airbags used in vehicles mainly generate gas through chemical reactions. The chemical reaction process needs to be ignited, and the reaction speed is very fast. The gas generated in the explosion fills the airbag, and at the same time, local high temperature is generated, so the structure is more complicated. Gas is produced too fast, local high temperature and other characteristics will cause harm to people, especially in the field of anti-fall for the elderly. The inflation system of the lifejacket generally adopts manual control and automatic control after encountering water. A single bottle is used to inflate the lifejacket. In order to ensure the buoyancy and inflation space is large, the inflation speed is less than 5 seconds, and the inflation time for the protection against falling is too long.

Contents of the invention

The purpose of the present invention is to provide an anti-fall protection system, which can inflate the airbag by judging the occurrence of a fall, so as to play a protective role.

In order to achieve the above object, a kind of anti-drop protection system of the present invention comprises:

Inflatable airbag subsystem: used to inflate the inflatable airbag;

Fall pre-judgment subsystem: judge whether to enter the fall and vacate state through sensor signals from all over the body, and control the inflatable airbag subsystem to implement the inflatable protection action after judging and confirming that the inflatable airbag subsystem has entered the fall and vacate state; the inflatable airbag subsystem includes Inflatable airbags, inflation valves, and inflation bottles, wherein the opening of the inflation valve is controlled by the fall prediction subsystem;

The inflatable airbag includes a main inflation pipeline, an auxiliary inflation pipeline, and the remaining parts of the capsule body; during the inflation process, the priority of the main inflation pipeline is greater than that of the auxiliary inflation pipeline, and the priority of the auxiliary inflation pipeline is greater than that of the remaining parts of the capsule body; the main inflation pipeline Connected with the inflation valve, the main inflation pipeline is coaxial with the air outlet of the inflation valve, the diameter of the main inflation pipeline is larger than the auxiliary inflation pipeline, and the axial direction of the main inflation pipeline is the main ejection direction when the inflatable airbag is inflated and expanded.

As a further improvement of the present invention, the inflatable airbag is equipped with a pressure limiting valve. After the gas pressure in the airbag exceeds a preset threshold, the pressure limiting valve is squeezed by the air pressure to release the air. When the pressure drops below the preset threshold, the pressure limiting valve is automatically closed. ; The auxiliary inflation pipeline is connected vertically and horizontally with the main inflation pipeline, and the auxiliary inflation pipeline is inflated by the gas in the main inflation pipeline, and the remaining parts of the capsule body of the inflatable air bag are communicated with the auxiliary inflation pipeline and the main inflation pipeline, and the main inflation pipeline and the gas in the auxiliary inflation pipeline to inflate the rest of the bladder body, the air pressure demand of the auxiliary inflation pipeline is prior to the rest of the bladder body; the connection between the main inflation pipeline and the auxiliary inflation pipeline, the main inflation pipeline and the inflatable air bag capsule The connection of the remaining parts, the connection of the auxiliary inflation pipeline and the rest of the inflatable airbag body all pass through the pressure limiting valve, and when the inflation pipeline with high priority reaches the preset pressure, it will flow to the inflation pipeline or the rest of the bladder with low priority. Partially inflated, the low-priority inflation pipeline or the rest of the capsule will not backfill the high-priority inflation pipeline.

As a further improvement of the present invention, the inflatable airbag is inflated simultaneously by using a gas cylinder with multiple inflating nozzles or using multiple gas cylinders.

As a further improvement of the present invention, the fall prediction subsystem includes a plantar pressure sensor, a posture sensor, a wireless transceiver module, a data processing unit, and a control output unit for the airbag system, and the plantar pressure sensor data and posture sensor used in it For the summary of data, the wired or wireless transmission mode is set according to the location of the data processing unit, and the long distance is set as wireless transmission.

As a further improvement of the present invention, the fall prediction system is based on the simultaneous occurrence of the state of both feet off the ground and the state of overturning or sinking after the body is out of balance, wherein the state of both feet off the ground is The pressure of both feet on the ground is reduced to a very low state at the same time; among them, the judgment of the state of both feet leaving the ground is judged by the plantar pressure sensor of both feet, and the judgment threshold is based on the plantar pressure value after the user lifts the foot every time he walks Setting, the layout point of the sensor is selected in the insole or the interlayer of the sole, firstly the judgment threshold is preset to a very low value, which is used to eliminate the error due to the production process and electronic components, and then record the usage every time According to the user's plantar pressure when walking, select the value of the plantar pressure after lifting the foot to correct the preset value, so that personalized adjustments can be made according to the user's walking habits, weight, tightness of shoes, etc.; after the body is out of balance The judgment of the overturning or sinking state is determined by the attitude sensor worn on the upper body of the body. When the axial acceleration of the human body to the ground measured by the attitude sensor is close to free fall for a certain period of time, or the measured human body flips along the three axes of space After a certain period of time, or when the human body movement speed is measured to exceed the normal movement speed for a certain period of time, it is determined that the body is in a state of overturning or sinking after the body is out of balance.

As a further improvement of the present invention, the judgment of the falling direction is jointly judged by the foot pressure sensor and the posture sensor worn on the upper body, and the main judgment directions include front, back, left, right, front left, front right, back left, and back right Eight directions, the judgment is based on the sudden decrease trend direction of the pressure of the two feet before it is judged that the pressure of the two feet is off the ground with time and the flip direction of the three axes of space measured by the attitude sensor. At this time, the comparison of the installation position of the attitude sensor The best solution is to arrange the installation points along the position of the human spine.

As a further improvement of the present invention, four plantar pressure sensors are installed in the interlayer of the insole or the sole, which are respectively located at S4 below the calcaneus, S1 below the distal phalanx of the first phalanx, S2 below the bottom of the proximal phalanx of the first phalanx, and S2 below the bottom of the first phalanx. S3 below the base of the fourth or fifth proximal phalanx, the sequence from the toe to the heel in the longitudinal direction is S1, S2, S3, S4. During the fall, before the feet fly, the time sequence diagram of the sudden drop in pressure can be used to judge the withdrawal force in the longitudinal direction Trend, so as to serve as a reference basis for falling in two general directions forward and backward; take the left foot as an example in the horizontal direction, the sequence from left to right is S3, S4, S1, S2, and the left and right positions of S1 and S2 can be exchanged or basically kept in a line On the straight line, at the same time, the trend of force withdrawal in the lateral direction can be judged through the time sequence diagram of the sudden pressure drop, so as to serve as a reference for falling in the left and right directions.

As a further improvement of the present invention, the sudden reduction trend of the plantar pressure determines the overall overturning direction of the feet and calves, and reasoning predicts the overall overturning direction of the thigh and the body parts above the thigh. The angle change data of the attitude sensor on the upper body such as the waist, not the limbs, on the three axes determines the overall turning direction of the thigh and the body parts above the thigh.

As a further improvement of the present invention, the inflation valve used in the inflatable airbag subsystem is an electromagnetic inflation valve, and the control signal for the electromagnetic inflation valve comes from the fall prediction system; the electromagnetic inflation valve includes an airbag connecting part , gas cylinder connecting part, electromagnetic inflation valve cavity, electromagnetic switch, electromagnetic control signal line, wherein the airbag connecting part and the gas cylinder connecting part can rotate independently relative to the electromagnetic charging valve cavity, and maintain the sealing of the connecting parts.

As a further improvement of the present invention, when the inflatable airbag is used to protect the head, the airbag is installed under the collar, and the ejection direction of the airbag is upward when inflated. The shape of the airbag is a hemispherical cavity, wrapping the back of the wearer's head.

As a further improvement of the present invention, the inflatable air bag is located at the waist to protect the waist, coccyx, and pelvis, located at the joints to protect the joints, located at the neck to protect the neck and the head.

As a further improvement of the present invention, from the appearance and the position of the human body, the main choice is to use a false collar and a waist belt to protect the head and waist, and the design of the inflatable bottle is designed to fit the human body according to the position of the distribution. The shape, such as a ring, or a T-shaped with a radian.

Beneficial effects of the present invention: the present invention uses high-pressure gas cylinders to inflate the air bag, inflates the same space through multiple high-pressure gas cylinders, and increases the inflation speed. In terms of the sequence of inflation, the entire space is not uniformly inflated, but The airbag is divided into different levels of inflatable channels, and the important channel space is inflated first, then the secondary channel space is inflated, and finally the rest of the airbag is inflated, so that the key parts are protected first, and then other parts are inflated. Protection, reducing the adverse effects that may occur when the inflation speed is not enough. At the same time, the inflatable space is limited to minimize the inflatable space and increase the inflatable speed under the premise of ensuring the anti-drop effect. The high-pressure gas cylinders are divided into parts, and multiple small bottles are inflated at the same time instead of one large bottle, which not only improves the inflation speed, but also improves the safety.

Description of drawings

Fig. 1 is the application schematic diagram of anti-drop protection system of the present invention;

Fig. 2 is the installation schematic diagram of the sole sensor of anti-drop protection system of the present invention;

Fig. 3 is a schematic diagram of the head protection inflatable air bag subsystem of the anti-fall protection system of the present invention;

Fig. 4 is the schematic diagram of the electromagnetic charging valve of the anti-drop protection system of the present invention;

Fig. 5 is the schematic diagram of the T-type inflatable gas cylinder of the anti-drop protection system of the present invention

Fig. 6 is a schematic diagram of an annular multi-inflatable nozzle gas cylinder of the anti-drop protection system of the present invention.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

An anti-fall protection system as shown in Figure 1, through the plantar pressure sensor located in the insole or the midsole of the shoe, and the posture sensor located between the waist and the tailbone and placed on the belt, jointly judge the user's fall The state and the falling direction correspond to opening the airbag at the corresponding position. When the head is protected, the posture sensor is installed behind the base of the neck and placed in the false collar. After the fall prediction system judges that it has slipped backwards, the airbag on the back of the user on the belt inflates an arc-shaped airbag downward to protect the user's coccyx and pelvis. At the same time, the hemispherical airbag cavity in the false collar pops out to protect the back of the head.

The process of falling is divided into three stages. The first stage is from the normal action state suddenly entering the unbalanced state due to some reasons. The second stage is the state of overturning and sinking after the body is out of balance. The third stage is the fall when the body touches the ground. local state. At the same time, the second stage is accompanied by the state of both feet leaving the ground, that is, the pressure of both feet on the ground drops to a very low state at the same time. The determination of falling is determined in the second stage, and the inflatable airbag subsystem is controlled to start inflating immediately after determination, and the inflation is completed before entering the third stage.

As shown in the schematic diagram of plantar sensor installation shown in Figure 2, four plantar pressure sensors are installed in the interlayer of the insole or sole, which are respectively located at S4 below the calcaneus, S1 below the distal phalanx of the thumb (first phalanx), and S1 below the big toe (first phalanx). S2 below the bottom of the proximal phalanx of the thumb (first phalanx), S3 below the bottom of the fourth (or fifth) proximal phalanx. The sequence from toe to heel in the longitudinal direction is S1, S2, S3, S4. During the fall process, before the two feet fly into the air, the time sequence diagram of the sudden drop in pressure can judge the force withdrawal trend in the longitudinal direction, so that it can be used as the direction of falling in two general directions, forward and backward. The reference basis for inversion, taking the left foot as an example in the horizontal direction, the order from left to right is S3, S4, S1, S2, in which the left and right positions of S1 and S2 can be exchanged or basically kept in a straight line, and at the same time through the time sequence of sudden pressure reduction The graph can judge the trend of force withdrawal in the lateral direction, so as to serve as a reference for falls in the left and right directions. For example, the pressure signal of one foot is very low, and the pressure value of the other foot is detected to drop to a very low value at S4. It is basically considered that the user's center of gravity is no longer near this point, and the pressure value is detected after S1. The value dropped suddenly to a very low value. After the two feet are in the air, it can be predicted that there is a possibility of falling forward. The final judgment result is determined in combination with the position of the attitude sensor and the measured rotation along the three axes. The signals of the four pressure sensors on each foot are transmitted to the wireless transmission module through the FPC flexible circuit board. The wireless transmission module and the battery are on the heel upper, and the inner side of the heel upper is pasted together, or the wireless transmission module and the battery are made of plastic. Clamp clips to rear heel collar.

The head protection inflatable air bag subsystem shown in accompanying drawing 3 is made up of hemispherical air bag, electromagnetic inflation valve 4, high-pressure cylinder 5. Wherein, the airbag includes a main inflation pipeline 1 , an auxiliary inflation pipeline 2 and the remainder 3 of the airbag. The hemispherical airbag has four inflation nozzles, corresponding to four electromagnetic inflation valves, and each two corresponds to a longitudinal main inflation pipe to inflate, which can realize the function of multiple gas cylinders to quickly inflate a main inflation pipe. In the figure, a ring is used. Talkative cylinder. The longitudinal main inflation pipeline bears the main force, and the horizontal auxiliary inflation pipeline and the rest of the airbag bear the auxiliary force. When inflating, the inflation speed and air pressure in the main inflation pipeline are given priority. Through the description of the structure, those skilled in the art can easily make airbags for protecting the waist, coccyx, pelvis, joints, and neck according to the airbag structure of the present invention.

The electromagnetic inflating valve as shown in FIG. 4 includes an air bag connecting part 8 , a gas cylinder connecting part 9 , an electromagnetic inflating valve cavity 7 , an electromagnetic switch 6 , and an electromagnetic control signal line 10 . The air inlet of the inflation valve is connected with the inflation bottle, and the air outlet of the inflation valve is connected with the inflation air bag. Wherein, the connecting part of the air bag and the connecting part of the gas cylinder can rotate independently relative to the cavity of the electromagnetic inflation valve, and the sealing of the connecting parts can be maintained.

The T-shaped gas cylinder as shown in accompanying drawing 5 and the annular (or arc) gas cylinder shown in accompanying drawing 6 can better match the wearing of the user. The long gas bottle can open multiple inflation nozzles from the side to facilitate the docking of inflation valves in different positions. The inflatable cylinder is an inert gas or carbon dioxide high-pressure gas cylinder, and its shape is designed to be close to the body where it is placed.

The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be assumed that the specific implementation of the present invention is limited to these descriptions. For those of ordinary skill in the technical field of the present invention, without departing from the concept of the present invention, some simple deduction or replacement can be made, which should be regarded as belonging to the protection scope of the present invention.

Claims (10)

1. a kind of shatter-resistant protects system, the system includes：

Air bag subsystem：For being inflated to air bag；

Fall down anticipation subsystem：Judge whether to enter by the sensor signal of body everywhere and fall down airborne, judging true Determine to enter and fall down after airborne, control the air bag subsystem to implement gas-filled protective action；The air bag subsystem System includes air bag, and charge valve, the unlatching of gas filling bottle, wherein charge valve falls down anticipation subsystem controls by described；It is special Levy and be：

The air bag includes main gas charge pipeline, auxiliary gas ducting, utricule remainder；The auxiliary gas ducting and main gas charge Pipeline is connected in length and breadth, in gas replenishment process, and the priority of main gas charge pipeline is more than auxiliary gas ducting, the gas in main gas charge pipeline Auxiliary gas ducting is inflated, the priority of auxiliary gas ducting is more than utricule remainder；The main gas charge pipeline with it is described Charge valve is connected, and main gas charge pipeline is coaxial with the gas outlet of charge valve, and the diameter of main gas charge pipeline is more than auxiliary gas ducting, and master fills The axial direction of feed channel is main ejection direction when air bag is inflating expanded.

2. shatter-resistant according to claim 1 protects system, it is characterised in that：The air bag band limited valve, in gas Gas pressure in capsule exceedes after predetermined threshold value, and pressure limiting valve squeezes deflation by air pressure, pressure limiting valve after dropping to below predetermined threshold value It is automatic to close；The utricule remainder of the air bag and auxiliary gas ducting and main gas charge pipeline communication, by main gas charge pipeline Utricule remainder is inflated with the gas in auxiliary gas ducting, the air pressure demand priority of auxiliary gas ducting is in the utricule Remainder；The remainder of the connection of the main gas charge pipeline and auxiliary gas ducting, main gas charge pipeline and air bag utricule Connect, the connection of the remainder of auxiliary gas ducting and air bag utricule all by pressure limiting valve, when the high inflation of priority Pipeline is inflated to the low gas ducting of priority or utricule remainder again after reaching default pressure, the low inflation of priority Pipeline or utricule remainder are refused to pour in down a chimney to the gas ducting of high priority.

3. shatter-resistant according to claim 1 protects system, it is characterised in that：Using the gas cylinder of many charging connectors or using many gas Bottle is inflated to the air bag simultaneously.

4. shatter-resistant according to claim 1 protects system, it is characterised in that：The anticipation subsystem of falling down is pressed including vola Force snesor, attitude transducer, radio receiving transmitting module, data processing unit, the control output unit to gas-bag system, it is used Plantar pressure sensor data and attitude transducer data collect, set wired according to the situation of data processing unit Or wireless transmission method, distance it is remote be set as be wirelessly transferred.

5. shatter-resistant according to claim 4 protects system, it is characterised in that described to fall down anticipation subsystem, what it was fallen down Judgment basis be lift airborne and body it is unbalance after upset or occur while sinking state, wherein lifting Airborne is that double-legged ground pressure is die-offed to low-down state simultaneously；Wherein, the judgement for airborne of lifting passes through Double-legged plantar pressure sensor judges that plantar pressure value when decision threshold is walked every time according to user after foot-up is set, its The laying point selection of sensor is in the interlayer of shoe-pad or sole, and decision threshold presets a low-down value first, for disappearing Except the error due to production technology and electronic component, then every time in use, recording foot force when user walks Situation, chooses the plantar pressure value amendment preset value after foot-up, so can be according to the walking habits, body weight, wear shoes of user Tightness situations such as make personalization adjustment；The judgement of upset or sinking state after body is unbalance is by being worn on body The attitude transducer of the body upper part of the body judges, freely falls when the axial acceleration of the human body that attitude transducer is measured earthward is close Along space three axially occurs for body certain time, or the human body measured upset certain time, or measures human motion speed Be determined as after proper motion speed certain time enter body it is unbalance after upset or sinking state, the laying of its sensor Point selection is in neck rear, waist rear or wrist.

6. shatter-resistant according to claim 4 protects system, it is characterised in that：Plantar pressure is passed through to the judgement for falling down direction Sensor and the above the waist attitude transducer worn judge jointly, it is main judge direction include front, rear, left and right, it is front left, preceding The right side, rear left, eight directions of rear right, basis for estimation is for two foot forces in the pressure before soaring that is judged as lifting with the time The trend that die-offs direction and the reverses direction for three axles in space of attitude transducer measurement, now attitude transducer installation position The scheme put is to lay mount point along human vertebra position.

7. shatter-resistant according to claim 6 protects system, it is characterised in that：Four are provided with the interlayer of shoe-pad or sole Individual plantar pressure sensor, respectively positioned at S4, ossa suffraginis distal phalanx lower section S1, ossa suffraginis proximal phalanx bottom below calcaneum Side S3 under the proximal phalanx of lower section S2, the 4th or the 5th, order of the longitudinal direction from tiptoe to heel is S1, S2, S3, S4, is fallen down Before bipod soars in journey, the time sequencing figure die-offed by pressure may determine that longitudinal direction removes power trend, so that as forward The reference frame that latter two general orientation is fallen down；Laterally by taking left foot as an example, from left to right order is S3, S4, S1, S2, wherein S1, S2 Right position can be exchanged or substantially remained on straight line, while the time sequencing figure die-offed by pressure may determine that horizontal stroke Power trend is removed to direction, so that the reference frame fallen down as the general orientation of left and right two.

8. shatter-resistant according to claim 7 protects system, it is characterised in that：The tendency judgement pin and small of die-offing of plantar pressure The overall reverses direction of leg, and body part this overall reverses direction more than reasoning anticipation thigh and thigh, finally By angle change data judging thigh of the attitude transducer on the non-four limbs in upper body on three axles and body more than thigh Partly this overall reverses direction.

9. shatter-resistant according to claim 1 protects system, it is characterised in that：What is used in the air bag subsystem fills Air valve is electromagnetic inflation valve, and the control signal to the electromagnetic inflation valve falls down anticipation subsystem described in；The electromagnetism fills Air valve includes air bag connection member, gas cylinder connection member, electromagnetic inflation valve cavity, electromagnetic switch, electromagnetic control signal line, wherein Air bag connection member and gas cylinder connection member can independently rotate relative to electromagnetic inflation valve cavity, and keep close at connection member Feng Xing.

10. shatter-resistant according to claim 1 protects system, it is characterised in that：When the air bag is used to protect head, Air bag is arranged under collar, and upwards, bladder shape is hemispherical cavity to ejection direction of the air bag in inflation, after parcel wearer Brain.