CN117046036B - A control circuit and control method for an airbag-type shock absorption and cushioning mechanism of a treadmill - Google Patents
A control circuit and control method for an airbag-type shock absorption and cushioning mechanism of a treadmillInfo
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- CN117046036B CN117046036B CN202311193192.8A CN202311193192A CN117046036B CN 117046036 B CN117046036 B CN 117046036B CN 202311193192 A CN202311193192 A CN 202311193192A CN 117046036 B CN117046036 B CN 117046036B
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- running
- airbag
- treadmill
- air pressure
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B22/00—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements
- A63B22/02—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements with movable endless bands, e.g. treadmills
- A63B22/0207—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements with movable endless bands, e.g. treadmills having shock absorbing means
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B24/00—Electric or electronic controls for exercising apparatus of preceding groups; Controlling or monitoring of exercises, sportive games, training or athletic performances
- A63B24/0062—Monitoring athletic performances, e.g. for determining the work of a user on an exercise apparatus, the completed jogging or cycling distance
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- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physical Education & Sports Medicine (AREA)
- Cardiology (AREA)
- Vascular Medicine (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
- Air Bags (AREA)
Abstract
本发明涉及一种跑步机的气囊式减振缓冲机构的控制电路及控制方法，通过所述安全控制电路和控制方法的设计持续监测气囊气压，一方面通过将气囊气压控制在安全阀值范围，另一方面在气囊异常破裂时通过硬件电子电路触发跑步机下控制器紧急停止跑步机运行。确保跑步者不会由于跑台失去气囊支撑而跌倒被运行的跑带带动甩出受伤，以杜绝安全隐患。同时本发明可以在不增加硬件成本情况下，通过内置在单片机存储中的算法软件监测跑步姿态，提醒跑步者纠正跑姿，避免长期跑姿错误引起的膝盖受伤等运动伤害。
This invention relates to a control circuit and method for an airbag-type shock absorption mechanism in a treadmill. The design of the safety control circuit and method continuously monitors the airbag pressure. On one hand, it controls the airbag pressure within a safe threshold range; on the other hand, in the event of an abnormal airbag rupture, the hardware electronic circuit triggers the treadmill's lower controller to urgently stop the treadmill. This ensures that runners will not fall and be thrown off the running belt due to the loss of airbag support, thus eliminating safety hazards. Simultaneously, this invention can monitor running posture through algorithm software built into the microcontroller's storage without increasing hardware costs, reminding runners to correct their running posture and avoiding sports injuries such as knee injuries caused by long-term incorrect running posture.
Description
Technical Field
The invention belongs to the technical field of fitness equipment, and particularly relates to a control circuit and a control method of an air bag type vibration reduction buffer mechanism of a running machine.
Background
Running machines are commonly used exercise equipment, widely used in homes and business gymnastics. In order to reduce the impact force of the running platform, in particular to adjust the vibration reduction and buffering elastic quantity of the running platform, more and more running machines adopt an air bag as an elastic functional supporting component of a running platform running plate.
However, the prior art does not consider that when the airbag is abnormally ruptured, a runner can fall down due to the fact that the running platform loses the airbag support, and particularly the problem that the runner is dangerous under the condition of high speed is solved, and the airbag damping and buffering mechanism has a great potential safety hazard.
The invention of the running board and the running machine for realizing the self-adjustment of the soft hardness of the running board comprises a frame, a running board body, an air bag, a sinking monitor, an infrared light emitting tube, an air bag and a safety hidden trouble, wherein the running board body and the air bag are used for realizing the self-adjustment of the soft hardness of the running board, the running board body is arranged on the frame, the air bag is arranged on the frame, the top of the air bag is propped against the running board body, the sinking monitor and the infrared light emitting tube are used for monitoring the sinking amplitude of the running board body, the hardness of the running board body is regulated by inflating/deflating the air bag according to the monitoring data of the sinking monitor, the air bag is only regulated by automatically according to the detected sinking amplitude, and the infrared emission and the receiving tube are easy to be covered by dust to fail so as not to normally control the air bag pressure.
And as per the running machine with damping function and the self-adaptive adjusting method of damping performance of the running machine, as per the Chinese patent application publication No. CN113663285A, a running platform underframe and a running plate arranged on the running platform underframe are provided, a damping device is arranged between the running plate and the running platform underframe, the damping device comprises an installation seat arranged on the running platform underframe and an air bag arranged in the installation seat, the upper top surface of the air bag is in butt joint or clearance fit with the lower bottom surface of the running plate, an air pressure sensor and an air pump which are communicated with the inside of the air bag are arranged on the running platform underframe, a control valve is arranged on the air bag, and a control system which is in signal connection with the air pump, the control valve and the air pressure sensor is arranged on the running platform underframe. Mainly also through gasbag atmospheric pressure detection, automatically regulated gasbag atmospheric pressure reaches the fat reduction function of adaptation weight, and the potential safety hazard that the gasbag breaks and causes is not considered yet to this patent.
The running machine adopting the air bag type vibration reduction buffer mechanism can achieve good vibration reduction buffer effect by adjusting air bag air pressure, improves running comfort and reduces impact to knees, but because the air bag continuously impacts in the running process, the air bag air pressure is adjusted out of control, or the air bag is aged, or the air bag is broken caused by abnormal conditions such as sharp foreign body collision, the air bag breaks, the running platform loses important supporting parts after the air bag breaks, a runner is easy to fall down, and particularly, the running belt falls down more dangerously in high-speed running. The prior art fails to address this problem.
On the other hand, as more and more people run on the running machine, however, many people will cause sports injuries such as knee injury due to incorrect long-term running posture, such as unbalanced left and right foot landing or body side-to-side swing, or too high recoil force caused by too high soaring. At present, the running posture monitoring and correcting method mainly comprises the steps of hanging and clamping the running posture sensor on a shoe or a waist, but the hanging and clamping method is incorrect and affects the monitoring accuracy due to the fact that the hanging and clamping device is inconvenient to use. In addition, although the professional sports running platform adopts a plurality of cameras to monitor running postures at a plurality of angles, the cost is very high, and the sports running platform cannot be popularized to the public for use.
Disclosure of Invention
In view of the shortcomings of the prior art, the technical problem to be solved by the invention is to provide a control circuit and a control method of an air bag type vibration damping buffer mechanism of a running machine, which can monitor the running condition of the running machine and stop the running machine when the running condition is abnormal, and can detect the running posture of a user to correct and guide the user to run correctly.
In order to solve the technical problems, the technical scheme includes that the control circuit of the air bag type vibration reduction buffer mechanism of the running machine comprises a running machine main system, a left air bag air pressure sensor, a right air bag air pressure sensor, a left air pressure electric signal amplifier, a right air pressure electric signal amplifier and a control system, wherein the left air bag air pressure sensor is electrically connected with the left air pressure electric signal amplifier, the right air bag air pressure sensor is electrically connected with the right air pressure electric signal amplifier, and the control system is electrically connected with the left air bag air pressure sensor, the right air bag air pressure sensor, the left air pressure electric signal amplifier and the right air pressure electric signal amplifier, and the control system is electrically connected with the running machine main system.
Further, the control circuit also comprises a singlechip, a left analog-to-digital converter, a right analog-to-digital converter, an air pump driver, an air pump motor, a left in-out electric valve module and a right in-out electric valve module. The left analog-to-digital converter is electrically connected with the left air pressure electric signal amplifier, the left analog-to-digital converter is electrically connected with the single chip microcomputer, the right analog-to-digital converter is electrically connected with the right air pressure electric signal amplifier, the right analog-to-digital converter is electrically connected with the single chip microcomputer, the single chip microcomputer is electrically connected with the air pump driver, the air pump driver is electrically connected with the air pump motor, and the single chip microcomputer is electrically connected with the running machine main system.
Further, the single chip microcomputer is internally provided with a storage medium for storing running gesture monitoring algorithm software code modules, and the storage medium comprises a running flight time algorithm module, a running touchdown time module, a left-right balance proportion algorithm module, a running step number step frequency algorithm module and a stride algorithm module which relate to foot landing and body swinging gestures.
A control method of an air bag type vibration reduction buffer mechanism of a running machine comprises the following steps:
S1, under normal standby or normal operation of the running machine, a control system outputs a preset level signal, and a running machine main system does not trigger actions;
S2, judging whether the running machine is normal or not by detecting an electric signal of an air bag air pressure sensor;
s3, when the air bag air pressure sensor senses an electric signal of low air pressure, the running machine stops.
Further, the step S1 specifically comprises the following steps that under the condition that the running machine is in standby or running by a user, the air pressure of the air bag changes along with the rise and fall of the footsteps, and the control system outputs a preset level signal without triggering the action of the running machine main system.
Further, the specific steps of the step S2 and the step S3 are as follows, when the impact force of the falling footstep caused by a user is too large to exceed the upper limit of the air bag air pressure or the air bag is damaged, the air pressure of the corresponding air bag is rapidly reduced, the air pressure sensor of the left air bag or the air pressure sensor of the right air bag senses the electric signal of very low air pressure, the corresponding electric signal triggers the corresponding air pressure electric signal amplifier to output a reverse level signal, the reverse level signal is input to the control system, the control system outputs the reverse level signal, the power supply of the main motor of the running machine is triggered to be closed, the running belt is stopped to run, and the user is ensured not to be thrown out of the running belt to be injured.
Further, in step S2, whether the running posture of the runner is normal is detected through the storage medium built in the single chip microcomputer, the storage medium built in the single chip microcomputer stores the running mode monitoring algorithm software code module, and the running mode monitoring algorithm software code module judges the mode according to the left air bag air pressure value and the right air bag air pressure value change waveform corresponding to the process of collecting when the left foot and the right foot are grounded, and the mode of grounding is three modes of front sole grounding, full sole grounding and heel grounding.
1. Compared with the prior art, the invention has the beneficial effects that the air bag pressure is continuously monitored through the design of the control system, on one hand, the air bag pressure is controlled in the safety threshold range, and on the other hand, when the air bag is abnormally broken, the left air bag pressure sensor, the right air bag pressure sensor, the left air pressure electric signal amplifier and the right air pressure electric signal amplifier are matched, and the air bag pressure sensor and the electric signal amplifier at the corresponding broken part generate electric signals to the control system, so that the control system generates electric signals to the main system of the running machine, the main system of the running machine emergently stops running machine, and the running machine is ensured not to fall down due to the loss of the air bag support of the running table, so that the potential safety hazard is avoided.
2. Under the condition of not increasing hardware cost, running gestures are monitored through algorithm software built in the singlechip storage, a runner is reminded to correct the running gestures, and sports injuries caused by long-term running gesture errors are avoided.
Drawings
FIG. 1 is a schematic diagram of the circuit principle of the control circuit of the present invention;
FIG. 2 is a graph of forefoot contact in accordance with the present invention;
FIG. 3 is a graph of full sole strike in accordance with the present invention;
Fig. 4 is a graph of heel strike in accordance with the present invention.
The running machine is characterized by comprising a running machine main system 1, a left air bag air pressure sensor 2, a right air bag air pressure sensor 3, a left air pressure electric signal amplifier 4, a right air pressure electric signal amplifier 5, a control system 6, a 7, a singlechip, an 8, a left analog-to-digital converter 81, a right analog-to-digital converter 9, an air pump driver 91, an air pump motor 10, a left in-out electric valve module 101 and a right in-out electric valve module.
Detailed Description
In order to make the above features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.
As shown in fig. 1 to 4, the present embodiment provides a treadmill including a treadmill body, a running belt, an air bag, and a control circuit.
The running belt is arranged in the running area of the running machine body, the middle part of the running belt is provided with a running plate, the air bags are in a rectangular shape or an elliptic shape, and the left side and the right side below the running plate are arranged as supporting points of the running plate.
The control circuit comprises a running machine main system 1, a left air bag air pressure sensor 2, a right air bag air pressure sensor 3, a left air pressure electric signal amplifier 4, a right air pressure electric signal amplifier 5, a control system 6, a singlechip 7, a left analog-to-digital converter 8, a right analog-to-digital converter 81, an air pump driver 9, an air pump motor 91, a left in-out electric valve module 10 and a right in-out electric valve module 101.
The left air bag air pressure sensor 2 is electrically connected with the left air pressure electric signal amplifier 4, the right air bag air pressure sensor 3 is electrically connected with the right air pressure electric signal amplifier 5, the control system 6 is electrically connected with the left air bag air pressure sensor 2, the right air bag air pressure sensor 3, the left air pressure electric signal amplifier 4 and the right air pressure electric signal amplifier 5, and the control system 6 is electrically connected with the running machine main system 1.
The running machine main system 1 is used for controlling the starting and stopping of a main motor of a running belt of the running machine, the left analog-to-digital converter 8 is electrically connected with the left air pressure electric signal amplifier 4, the left analog-to-digital converter 8 is electrically connected with the single chip microcomputer 7, the right analog-to-digital converter 81 is electrically connected with the right air pressure electric signal amplifier 5, the right analog-to-digital converter 81 is electrically connected with the single chip microcomputer 7, the single chip microcomputer 7 is electrically connected with the air pump driver 9, the air pump driver 9 is electrically connected with the air pump motor 91, the air pump motor 91 is communicated with the air bag, and the single chip microcomputer 7 is electrically connected with the running machine main system 1.
The singlechip 7 is internally provided with a storage medium, the singlechip 7 is internally provided with a storage medium for storing running gesture monitoring algorithm software code modules, and the storage medium comprises a running flight time length algorithm module, a running ground contact time length module, a left-right balance proportion algorithm module, a running step number-step frequency algorithm module and a stride algorithm module which relate to foot landing and body swinging gestures.
The running gesture monitoring algorithm software code module is internally provided with an air bag air pressure threshold value so as to judge the ground-free empty state and the ground-touching state and the time length, and the algorithm is as follows:
the upper threshold is p_threshold_high and the lower threshold is p_threshold_low.
Before running, the upper threshold value and the lower threshold value are detected, calibrated and corrected.
Let the value of left air bag air pressure at the nth time be P_left_n in running process.
The n-th right air bag air pressure value is P_right_n.
When: P_left_n < P\u threshold_low.
The left foot lift off time, t_left_ awayn, is recorded.
Left foot ground-off air pressure: P_left_way_n =p_left_n.
And sets the Left foot status flag to 1, i.e., the ground free status, left_foot_status=1.
When: P_right_n < P\u threshold_low.
The right foot off-ground flight time, t_right_ awayn, is recorded.
Right foot off ground air bag pressure: P_right_way_n =p_right_n.
And sets the right foot status flag to 1, i.e., the ground free status: right_foot_status=1.
When: P_left_n > P\u threshold_high threshold (threshold) high.
The left foot touchdown time, t_left_touchdown, is recorded.
Left foot ground contact air bag pressure: P_left_touch \u n=p_left_n.
And sets the Left foot status flag to 0, i.e., the touchdown status: left_foot_status=0.
When: P_right_n > P\u threshold_high threshold (threshold) high.
The right foot touchdown time, t_right_touchdown, is recorded.
Right foot ground contact air bag pressure: P_right_touch/u n=p_right_n.
And sets the right foot status flag to 0, i.e., the touchdown status: right_foot_status=0.
The running flight time length algorithm module comprises left foot flight time length each time, right foot flight time length each time, total average left foot flight time length, total average right foot drive double-foot flight time length each time right foot drive double-foot flight time length, total average left foot drive double-foot flight time length, and calculation of the running flight time length, wherein the algorithm is that (ground contact refers to foot falling contact with a running belt, the running belt impacts a running plate through the running belt, and then impact force is transmitted to air bags on the left side and the right side below the running plate through the running plate
N-th left foot vacation time period:
T_left_awayn=t_left_touchn-t_left_awayn。
calculating the right foot vacation time length of the nth time:
T_rightt_awayn=t_right_touchn-t_right_awayn。
Total average left foot flight duration:
Total average right foot flight duration:
length of time of double feet vacation for nth time
In the front left hand case when t_left_touch > t_right_ awayn.
The nth double foot flight time of the right foot drive:
T_body_away_1n=t_left_touchn-t_right_awayn。
total average right foot drive bipedal length of time for emptying
In the front right foot case when t_right_touchn > t_left_ awayn.
The nth double foot flight time of the left foot drive:
T_body_away_2n=t_right_touchn-t_left_awayn。
Total average left foot drive bipedal length of time
The running ground contact time length algorithm module comprises a left foot ground contact time length of each time and a right foot ground contact time length of each time, and is calculated by the total average left foot ground contact time length and the total average right foot ground contact time length, and the algorithm comprises the following steps:
n-time left foot touchdown duration:
T_left_touchn=t_left_awayn+1-t_left_touchn。
total average left foot strike duration:
the nth right foot touchdown period:
T_right_touchn=t_right_awayn+1-t_right_touchn。
total average right foot strike duration:
The left-right balance proportion algorithm module comprises calculation of a total average left-right touchdown time length balance proportion and a total average left-right touchdown impact balance proportion, namely:
The total average left and right touchdown time length balance proportion is as follows:
Left touchdown duration Ratio: T_Base_Ratio_left =t_left_touch/- =t_left\u touch/. About..
Right touchdown duration Ratio: T_Base_Ratio_right =t_right_touch/- =t_right touch/-.
Nth left foot strike force: F_left_touch n=p_left\u n=p\u left/u.
Total average left foot strike force:
Nth right foot strike force: F_right_touch n=p_right/u n=p\u right u.
Total average right ground contact impact force:
the total average left and right ground contact impact force balance proportion is calculated by the algorithm:
Left foot touchdown impulse Ratio: F_Basance_Ratio u left=f_left_touch left=f/u left_touch.
Right foot touchdown impact Ratio: F_Basance_Ratio u right=f_right_touch right=f/u right_touch.
The running Step number and Step frequency algorithm module has the algorithm of a Step number counter step_counter and a Second accumulator second_timer.
When the running machine is in standby, the Step counter step_counter=0 is set.
After running the running machine, the Second accumulator Second Timer starts to count:
Step_counter+1 when the right foot status flag right_foot_status goes from 1 to 0.
Step_counter+1 when the left foot status flag left_foot_status goes from 1 to 0.
I.e. the number of steps is Step counter.
The average Step frequency is cadence=step_counter/(second_timer/60).
The scheme adopts the structure and provides a control method of the air bag type vibration reduction buffer mechanism of the running machine, which comprises the following steps:
S1, under normal standby or normal running of the running machine, the control system 6 outputs a preset level signal, and the running machine main system 1 does not trigger actions, wherein the specific steps of S1 are that under the condition that the running machine is in standby or running by a user, the air pressure of an air bag changes along with the rise and fall of a foot step, and the control system 6 outputs the preset level signal, so that the actions of the running machine main system 1 are not triggered.
S2, judging whether the running machine is normal or not by detecting an electric signal of an air bag air pressure sensor;
s3, when the air bag air pressure sensor senses an electric signal of low air pressure, the running machine stops.
The specific steps of the step S2 and the step S3 are as follows, when the impact force of the falling footstep caused by a user is too large to exceed the upper limit of the air bag air pressure or the air bag is damaged, the air pressure of the corresponding air bag is rapidly reduced, the air pressure sensor 2 of the left air bag or the air pressure sensor 3 of the right air bag senses the electric signal of very low air pressure, the corresponding electric signal triggers the corresponding air pressure electric signal amplifier to output a reverse level signal, the reverse level signal is input to the control system 6, the control system 6 outputs the reverse level signal, the main motor driving circuit power supply of the running machine is triggered to be closed by the main system 1 of the running machine, the running belt is stopped to run, and the user is ensured not to be thrown out and injured by the running belt which runs.
In step S2, whether the running machine is normal is detected through a storage medium built in the singlechip 7, the storage medium built in the singlechip 7 stores a running mode monitoring algorithm software code module, and the running mode monitoring algorithm software code module judges a running mode according to a left air bag air pressure value and a right air bag air pressure value change waveform corresponding to a process acquired when the left foot and the right foot are landed, wherein the running mode is three modes of front sole landing, full sole landing and heel landing, as shown in fig. 2-4.
While the basic principles and main features of the invention and advantages of the invention have been shown and described, it will be understood by those skilled in the art that the present invention is not limited by the foregoing embodiments, which are described in the foregoing description merely illustrate the principles of the invention, and various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents.
Claims (4)
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| CN113491860A (en) * | 2021-07-22 | 2021-10-12 | 舒华体育股份有限公司 | Intelligence treadmill based on hongmeng system |
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