Fall detection system based on wireless inductive sensor

Abstract

A tumble detection system based on a wireless inductive sensor comprises an anti-falling garment, the neckline and the waist of the anti-falling garment are provided with hook-and-loop fastener devices, N pairs of sensor modules are fixed in the hook-and-loop fastener devices, and the sensor modules detect speed vector data v of a wearer in real time and send the speed vector data v to a control device; the anti-falling clothes are characterized in that M lower hem wireless inductive sensors are installed on the lower hem of the anti-falling clothes, and M chest wireless inductive sensors are installed on the chest of the anti-falling clothes; the lower hem wireless inductive sensor and the chest wireless inductive sensor sense the wireless signal intensity of a wireless signal transmitting device installed on the ground in real time, convert sensed wireless signals into voltage signals and then send the voltage signals to the control device. The method has the advantages that tumble judgment use requirements of multiple scenes can be met, the accuracy of tumble judgment can be improved, tumble protection is more timely, and meanwhile the calculation pressure of the control device is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of protective wearable equipment, and in particular to a fall detection system based on a wireless induction sensor. Background Art

[0002] At present, most young people need to go out to work and cannot always be with the elderly. The elderly are very likely to fall down when they are alone at home or when they go out because of their inconvenience in walking. Therefore, some anti-fall protection devices have been launched on the market, but the existing anti-fall protection devices often have problems such as inaccurate fall judgment, untimely protection, and insufficient protection.

[0003] Disadvantages of existing technology: the judgment of falls is not accurate enough, the protection is not timely, and the protection is not strong enough. Summary of the invention

[0004] The present invention provides a fall detection system based on a wireless induction sensor, which can improve the accuracy of fall judgment and make fall protection more timely.

[0005] To achieve the above-mentioned purpose, the present invention provides a fall detection system based on wireless induction sensors, comprising an anti-fall suit, wherein the collar and waist of the anti-fall suit are provided with a Velcro device, N pairs of sensor modules are fixed in the Velcro device, the sensor module detects the wearer's speed vector data v in real time and sends it to a control device, and the control device outputs a control instruction to an airbag inflation device, characterized in that: the hem of the anti-fall suit is equipped with M hem wireless induction sensors, and the chest of the anti-fall suit is equipped with M chest wireless induction sensors, the hem wireless induction sensors and the chest wireless induction sensors sense the wireless signal strength of a wireless signal transmitting device installed on the ground in real time, and convert the sensed wireless signal into a voltage signal, and then send the voltage signal to the control device.

[0006] Through the above design, the N pairs of sensor modules are respectively used to collect the velocity vector data v of the wearer's neckline, waist and other directions in real time; the hem wireless sensing sensor is used to sense the wireless signal strength of the hem of the anti-fall suit from the wireless signal transmitting device, and the chest wireless sensing sensor is used to sense the wireless signal strength of the chest of the anti-fall suit from the wireless signal transmitting device. When the distance between the wireless sensing sensor and the wireless signal transmitting device is closer, the sensed wireless signal strength is stronger, and the converted voltage signal is also stronger.

[0007] The arrangement of the sensor module, the hem wireless induction sensor and the chest wireless induction sensor ensures that the wearer can be detected no matter under what circumstances he falls, thereby improving the accuracy of fall judgment.

[0008] The Velcro device is used to fix the sensor modules so that each pair of sensor modules always collects velocity vector data v in the corresponding orientation, ensuring that the wearer can be detected by the sensor modules in the corresponding orientation no matter from which orientation the wearer falls.

[0009] Preferably, the control device is further connected to a timer, and when the control device receives a hem voltage signal from the hem wireless induction sensor that reaches a fall warning voltage threshold, the timer starts timing;

[0010] When the control device receives a chest voltage signal from the chest wireless sensing sensor that reaches the warning fall voltage threshold, and the timer time t of the timer is less than the fall time threshold, the control device determines that the wearer is about to fall, and the control device immediately outputs a control instruction to the airbag inflation device.

[0011] Through the above design, the control device is connected to a timer, and the timer is used to time the time when the chest wireless induction sensor reaches the warning fall voltage threshold after the hem wireless induction sensor reaches the warning fall voltage threshold; the control device uses the timer time t of the timer as the basis for fall judgment, ensuring that the wireless signals collected by the hem wireless induction sensor and the chest wireless induction sensor are enhanced due to the wearer's fall, rather than the wearer sitting down or squatting normally, which effectively reduces the probability of misjudgment of fall judgment and improves the accuracy of fall judgment.

[0012] Preferably, the sensor module comprises an acceleration sensor and a gyroscope sensor, and the sensor module collects acceleration vector data α and angular velocity vector data ω of the wearer's collar and waist in real time, specifically including but not limited to acceleration vector data α and angular velocity vector data ω in front and back, left and right, left front and right back, and right front and left back;

[0013] The acceleration vector data α and the angular velocity vector data ω together constitute the wearer's velocity vector data v;

[0014] A sensor module worn on the collar and a sensor module worn on the waist that detect the same position are a pair of sensor modules.

[0015] The acceleration sensor is used to detect the acceleration vector data α of the wearer's neckline and waist in real time; the gyroscope sensor is used to detect the angular velocity vector data ω of the wearer's neckline and waist in real time.

[0016] Preferably, the sensor module detects the velocity vector data v of the neckline and waist of the wearer in real time, and transmits it to the control device, which calculates the velocity difference d detected by each pair of sensor modules in real time;

[0017] When the speed difference d detected by two or more pairs of sensor modules is greater than a preset falling speed threshold, the control device determines that the wearer is about to fall, and the control device immediately outputs a control instruction to the airbag inflation device.

[0018] Through the above design, when the wearer is in an area where no wireless signal transmitting device is installed, the fall detection system based on the wireless induction sensor can still accurately judge the wearer's fall behavior and provide timely protection, thereby meeting the multi-scenario usage requirements of the fall detection system based on the wireless induction sensor and making it more practical.

[0019] When the wearer is in an area where a wireless signal transmitting device is installed, the fall detection system based on the wireless induction sensor, timer and control device is mainly used to accurately judge the fall behavior of the wearer, which effectively reduces the calculation pressure of the control device and prolongs the service life of the fall detection system based on the wireless induction sensor.

[0020] Preferably, the wireless induction sensor is a Hall sensor or a radio frequency sensor.

[0021] Preferably, when the wireless induction sensor is a Hall sensor, the control device combines the voltage signal received from the Hall sensor with the angular velocity vector data ω from the gyroscope sensor to determine the fall state of the wearer;

[0022] When the control device receives a lower hem voltage signal from the lower hem Hall sensor that reaches a fall warning voltage threshold, and the angular velocity vector data ω collected by the gyro sensor is greater than a fall warning angle threshold, the timer starts timing;

[0023] When the control device receives a chest voltage signal from the chest Hall sensor that reaches the warning fall voltage threshold, and the timer time t of the timer is less than the fall time threshold, the control device determines that the wearer is about to fall, and the control device immediately outputs a control instruction to the airbag inflation device.

[0024] Through the above design, the angular velocity vector data ω collected by the gyroscope sensor is used as one of the necessary conditions for fall judgment, which avoids the Hall sensor being interfered by other magnetic components in the wearer's area and causing false triggering, thereby improving the fall judgment accuracy of the fall detection system based on wireless induction sensors.

[0025] Preferably, when the wireless induction sensor is a radio frequency sensor, when the control device receives a hem voltage signal from the hem radio frequency sensor that reaches a fall warning voltage threshold, the timer starts timing;

[0026] When the control device receives a chest voltage signal from the chest RF sensor that reaches the warning fall voltage threshold, and the timer time t of the timer is less than the fall time threshold, the control device determines that the wearer is about to fall, and the control device immediately outputs a control instruction to the airbag inflation device.

[0027] The radio frequency sensor has the characteristics of strong anti-interference ability, high accuracy, good reliability and strong versatility, and can effectively improve the fall judgment accuracy of the fall detection system based on wireless induction sensors, making fall protection more timely.

[0028] Preferably, the airbag inflation device comprises an airbag module and an inflation module, the airbag module is arranged at the collar and waist of the anti-fall suit, and the air inlet of the airbag module is connected to the inflation module.

[0029] The airbag module is used to provide real-time protection for a wearer who is in a falling state, and the inflation module is used to instantly inflate the airbag module to improve the timeliness of falling protection.

[0030] As a preference, the wireless signal transmitting device is either a magnetic floor tile with a specific magnetic field strength, or a magnetic steel floor with a specific magnetic field strength, or a carpet with an excitation coil with a specific magnetic field strength. The specific selection can be made according to actual use requirements.

[0031] The beneficial effects of the present invention are: it can meet the use requirements of fall judgment in multiple scenarios, can improve the accuracy of fall judgment, make fall protection more timely, and at the same time reduce the calculation pressure of the control device. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of the present invention. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below in conjunction with the accompanying drawings and specific examples. The following examples or drawings are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0034] like Figure 1As shown: a fall detection system based on wireless induction sensors, including an anti-fall suit, the collar and waist of the anti-fall suit are provided with a Velcro device 1, N pairs of sensor modules are fixed in the Velcro device 1, the sensor module detects the wearer's speed vector data v in real time and sends it to the control device 2, the control device 2 outputs a control instruction to the airbag inflation device 3, characterized in that: the hem of the anti-fall suit is installed with M hem wireless induction sensors 4a, and the chest of the anti-fall suit is installed with M chest wireless induction sensors 4b, the hem wireless induction sensors 4a and the chest wireless induction sensors 4b sense the wireless signal strength of the wireless signal transmitting device installed on the ground in real time, and convert the sensed wireless signal into a voltage signal, and then send the voltage signal to the control device 2.

[0035] The airbag inflation device 3 includes an airbag module and an inflation module. The airbag module is arranged at the collar and waist of the anti-fall suit, and the air inlet of the airbag module is connected to the inflation module.

[0036] The control device 2 is also connected to a timer. When the control device 2 receives a hem voltage signal from the hem wireless induction sensor 4a that reaches a fall warning voltage threshold, the timer starts timing.

[0037] When the control device 2 receives a chest voltage signal from the chest wireless sensing sensor 4b that reaches the warning fall voltage threshold, and the timer time t of the timer is less than the fall time threshold, the control device 2 determines that the wearer is about to fall, and the control device 2 immediately outputs a control instruction to the airbag inflation device 3.

[0038] The sensor module includes an acceleration sensor and a gyroscope sensor, which collects acceleration vector data α and angular velocity vector data ω of the wearer's collar and waist in real time, specifically including but not limited to acceleration vector data α and angular velocity vector data ω in front and back, left and right, left front and right back, and right front and left back;

[0039] The acceleration vector data α and the angular velocity vector data ω together constitute the wearer's velocity vector data v;

[0040] A sensor module worn on the collar and a sensor module worn on the waist that detect the same position are a pair of sensor modules.

[0041] The sensor module detects the velocity vector data v of the wearer's neckline and waist in real time, and transmits it to the control device 2, which calculates the velocity difference d detected by each pair of sensor modules in real time;

[0042] When the speed difference d detected by two or more pairs of sensor modules is greater than a preset falling speed threshold, the control device 2 determines that the wearer is about to fall, and the control device 2 immediately outputs a control instruction to the airbag inflation device 3.

[0043] When the wearer is in an area where a wireless signal transmitter is installed, the fall judgment combination of the wireless induction sensor, timer and control device is mainly used to accurately judge the wearer's fall behavior; when the wearer is in an area where no wireless signal transmitter is installed, the N sensor modules and control device are mainly used to accurately judge the wearer's fall behavior. This meets the multi-scenario use requirements of the fall detection system based on wireless induction sensors, making it more practical.

[0044] The wireless signal transmitting device in this embodiment is a magnetic floor tile with a specific magnetic field strength installed in the wearer's home, and the wireless induction sensor is a radio frequency sensor.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A fall detection system based on wireless induction sensors, comprising an anti-fall suit, wherein the collar and waist of the anti-fall suit are provided with a Velcro device (1), wherein N pairs of sensor modules are fixed inside the Velcro device (1), wherein the sensor modules detect the wearer's velocity vector data v in real time and send it to a control device (2), wherein the control device (2) outputs a control instruction to an airbag inflation device (3), wherein the system is characterized in that: The hem of the anti-fall suit is equipped with M hem wireless sensing sensors (4a), and the chest of the anti-fall suit is equipped with M chest wireless sensing sensors (4b). The hem wireless sensing sensors (4a) and the chest wireless sensing sensors (4b) sense the wireless signal strength of a wireless signal transmitting device installed on the ground in real time, convert the sensed wireless signal into a voltage signal, and then send the voltage signal to the control device (2).

2. The fall detection system based on wireless induction sensor according to claim 1, characterized in that: The control device (2) is also connected to a timer, and when the control device (2) receives a hem voltage signal from the hem wireless induction sensor (4a) that reaches a fall warning voltage threshold, the timer starts timing; When the control device (2) receives a chest voltage signal from the chest wireless induction sensor (4b) that reaches a fall warning voltage threshold, and the timer time t of the timer is less than the fall time threshold, the control device (2) determines that the wearer is about to fall, and the control device (2) immediately outputs a control instruction to the airbag inflation device (3).

3. The fall detection system based on wireless induction sensor according to claim 1, characterized in that: The sensor module includes an acceleration sensor and a gyroscope sensor, which collects acceleration vector data α and angular velocity vector data ω of the wearer's collar and waist in real time, specifically including but not limited to acceleration vector data α and angular velocity vector data ω in front and back, left and right, left front and right back, and right front and left back; The acceleration vector data α and the angular velocity vector data ω together constitute the wearer's velocity vector data v; A sensor module worn on the collar and a sensor module worn on the waist that detect the same position are a pair of sensor modules.

4. The fall detection system based on wireless induction sensor according to claim 1 or 3, characterized in that: The sensor modules detect speed vector data v of two different parts of the wearer's neckline and waist in real time, and transmit the data to the control device (2), and the control device (2) calculates the speed difference d detected by each pair of sensor modules in real time; When the speed difference d detected by two or more pairs of sensor modules is greater than a preset falling speed threshold, the control device (2) determines that the wearer is about to fall, and the control device (2) immediately outputs a control instruction to the airbag inflation device (3).

5. The fall detection system based on wireless induction sensor according to claim 2, characterized in that: The wireless induction sensor is either a Hall sensor or a radio frequency sensor.

6. The fall detection system based on wireless induction sensor according to claim 5, characterized in that: When the wireless induction sensor is a Hall sensor, the control device (2) combines the voltage signal received from the Hall sensor with the angular velocity vector data ω from the gyroscope sensor to determine the fall state of the wearer; When the control device (2) receives a lower hem voltage signal from the lower hem Hall sensor that reaches a fall warning voltage threshold, and the angular velocity vector data ω collected by the gyro sensor is greater than a fall warning angle threshold, the timer starts timing; When the control device (2) receives a chest voltage signal from the chest Hall sensor that reaches a fall warning voltage threshold, and the timer time t of the timer is less than the fall time threshold, the control device (2) determines that the wearer is about to fall, and the control device (2) immediately outputs a control instruction to the airbag inflation device (3).

7. The fall detection system based on wireless induction sensor according to claim 5, characterized in that: When the wireless induction sensor is a radio frequency sensor, when the control device (2) receives a hem voltage signal from the hem radio frequency sensor that reaches a fall warning voltage threshold, the timer starts timing; When the control device (2) receives a chest voltage signal from the chest radio frequency sensor that reaches a fall warning voltage threshold, and the timer time t of the timer is less than the fall time threshold, the control device (2) determines that the wearer is about to fall, and the control device (2) immediately outputs a control instruction to the airbag inflation device (3).

8. The fall detection system based on wireless induction sensor according to claim 1, characterized in that: The airbag inflation device (3) comprises an airbag module and an inflation module. The airbag module is arranged at the collar and waist of the anti-fall suit. The air inlet of the airbag module is connected to the inflation module.

9. The fall detection system based on wireless induction sensor according to claim 1, characterized in that: The wireless signal transmitting device is either a magnetic floor tile with a specific magnetic field strength; or a magnetic steel floor with a specific magnetic field strength; or a carpet with an excitation coil and a specific magnetic field strength.

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