WO2022120918A1

WO2022120918A1 - Wearable hip-protection airbag device with fall warning function

Info

Publication number: WO2022120918A1
Application number: PCT/CN2020/137198
Authority: WO
Inventors: 宁运琨; 赵国如; 王光辉; 蔡凌峰; 郑凯; 张宇
Original assignee: 中国科学院深圳先进技术研究院
Priority date: 2020-12-07
Filing date: 2020-12-17
Publication date: 2022-06-16
Also published as: CN112586820A

Abstract

A wearable hip-protection airbag device with a fall warning function, the device comprising an inner waistband (10) and an outer waistband (20), wherein the inner waistband (10) and the outer waistband (20) are worn on the waist of a subject, and the outer waistband (20) is positioned on the outer side of the inner waistband (10); a sensor is mounted on the inner waistband (10); an airbag (21) is mounted on a rear inner side of the outer waistband (20), and a main control box (23) is arranged on a front outer side of the outer waistband (20); the main control box (23) is internally provided with a main control board (221), a bidirectional piercing device (225) and compressed carbon-dioxide gas cylinders (226); the main control board (221) is connected to the sensor; two compressed carbon-dioxide gas cylinders (226) are provided, and the two compressed carbon-dioxide gas cylinders (226) are respectively fixed at left and right ends of the bidirectional piercing device (225); and the airbag (21) is connected to the main control box (23) by means of a gas guiding pipe (14). The device can inflate the airbag (21) by means of the two compressed carbon-dioxide gas cylinders (226), the inflation speed is faster, and the warning time is greatly shortened. In addition, the device has a relatively small computing amount, high accuracy and a low false alarm rate.

Description

A wearable hip protection airbag device with fall warning function

technical field

The present application belongs to the technical field of fall warning, and particularly relates to a wearable hip protection airbag device with a fall warning function.

Background technique

In order to maintain a delicate balance when walking or standing, the human body adjusts its posture through ankles, hips, trunk and striding strategies voluntarily. The control of this balance is affected by the motor system and the central nervous system. When the balance is broken and the body cannot be adjusted to maintain stability, or the balance ability and neurocognitive function are severely damaged and cannot be adjusted independently, the balance cannot be maintained, and falls will occur. With age, balance ability gradually deteriorates, and the risk of falling will also increase, and as age increases, the body's ability to take remedial measures on its own after a fall also slows down. According to statistics, hip fracture is a common serious injury in the elderly, and more than 90% of the elderly hip fractures are caused by falls. The wearable hip protection airbag device with fall warning function is an effective means of fall prevention. It studies the movement information of people who are prone to falls, and provides hip cushioning protection during the fall process, which can effectively reduce the fall of the elderly. The harm suffered is of great significance to solving the medical and social problems brought about by the aging of the population. However, the existing wearable hip protection airbag devices with fall warning function generally suffer from small protective area, long warning time, long gas cylinder deflation time, high false alarm rate of fall early warning algorithm, high cost of replacing gas cylinder, and poor wear. comfort, etc.

SUMMARY OF THE INVENTION

The present application provides a wearable hip protection airbag device with a fall warning function, which aims to solve one of the above technical problems in the prior art at least to a certain extent.

In order to solve the above problems, the application provides the following technical solutions:

A wearable hip protection airbag device with a fall warning function includes an inner waistband and an outer waistband, the inner waistband and the outer waistband are respectively worn on the waist of a guardian, and the outer waistband is located outside the inner waistband; A sensor for collecting human motion data is installed on the waistband; an airbag is installed on the rear and inner side of the outer waistband, and a main control box is arranged on the front and outer side of the outer waistband, and the main control box includes a main control board, a two-way barbed The main control board is connected to the sensor, the number of the carbon dioxide compressed gas cylinders is two, and the two carbon dioxide compressed gas cylinders are respectively fixed on the left and right ends of the two-way puncturing device The airbag is connected with the main control box through the airway; the main control board is used to obtain the human body motion data collected by the sensor, and adopts the fall warning algorithm to identify the fall action, and if the fall action is identified, control the The two-way piercing device pierces the carbon dioxide compressed gas cylinder to inflate the airbag to protect the guardian in the event of a fall.

The technical solution adopted in the embodiment of the present application further includes: the left and right ends of the bidirectional puncturing device are further provided with puncture needles, and the puncture needles correspond to the positions of the carbon dioxide compressed gas cylinder.

The technical solutions adopted in the embodiments of the present application further include: the main control box is further provided with a battery, an electric steering gear and a two-way cam, and the battery is connected to the electric steering gear for supplying power to the electric steering gear; the The electric steering gear is connected to the main control board, and the two-way cam is located above the electric steering gear and is connected to the two-way piercing device; if a fall action is recognized, the main control board controls the electric steering gear to drive the two-way cam to rotate , convert the rotary motion of the electric steering gear into linear motion through the two-way cam, push the two puncturing needles at the left and right ends of the two-way piercing device to move to both sides and pierce the carbon dioxide compressed gas cylinder, so that the The carbon dioxide compressed gas cylinder releases carbon dioxide gas, and the carbon dioxide gas is inflated into the airbag through the airway.

The technical solutions adopted in the embodiments of the present application further include: the main control board is further provided with a fall early warning module, and the fall early warning module adopts a fall early warning algorithm based on data statistics to analyze the human body motion data to determine whether the current action is It belongs to a fall action. When a fall action is recognized, an iterative early warning signal is generated, and the fall early warning signal is converted into an electrical signal through the main control board, and the electric steering gear is controlled to drive the bidirectional cam to rotate.

The technical solutions adopted in the embodiments of the present application further include: the fall warning algorithm is specifically:

acquiring human body motion data collected by the sensor; the human body motion data includes three-axis acceleration and three-axis attitude angle data;

Calculate the resultant acceleration of the current movement according to the three-axis acceleration, and judge whether the current movement belongs to a fall-like movement or a daily movement according to the resultant acceleration; if it belongs to a fall-like movement,

According to the attitude angle data, it is judged whether the current action is a real falling action or an intense daily action, and if it is a real falling action, a fall warning signal is generated.

The technical solution adopted in the embodiment of the present application further includes: a main control box bag is further provided on the front and outer side of the outer waistband, the main control box is installed in the main control box bag, and the main control box bag is further provided with a zipper .

The technical solutions adopted in the embodiments of the present application further include: the main control box bag is further provided with a small transparent window, and the main control box is also provided with on/off buttons for controlling the power supply, and buttons for adjusting the volume of the sound. An adjustment button and a one-touch call button for emergency call, and the small window corresponds to the positions of the three buttons.

The technical solution adopted in the embodiment of the present application further includes: the inner waistband has elasticity, and two ends of the inner waistband are movably connected by a first fixing component.

The technical solution adopted in the embodiment of the present application further includes: two ends of the outer waistband are respectively provided with an adjustment belt and a second fixing component, which are fixed to the outer side of the inner waistband through the adjustment belt and the second fixing component, and The length is adjusted by the adjustment strap.

The technical solution adopted in the embodiment of the present application further includes: the inflated airbag is a fan-shaped buffer pad with an area of 0.23 square meters and a thickness of 6.2 cm.

Compared with the prior art, the beneficial effects of the embodiments of the present application are: the wearable hip protection airbag device with a fall warning function according to the embodiments of the present application adopts an inner and outer double waist belt structure, and the sensor is fixed by the inner waist belt, so that the collection is more stable. Human body movement data; the airbag is installed through the outer belt, and an independent main control box is set, so that the overall performance of the large-area airbag will not be affected, and it is more beautiful; the fall warning algorithm based on data statistics is used to calculate the fall action in real time. The calculation amount is small, the accuracy is high, and the false alarm rate is low; the airbag is inflated through two carbon dioxide compressed gas cylinders, and the inflation speed is faster, which can greatly shorten the warning time, and the carbon dioxide compressed gas cylinder can be replaced, greatly reducing repeated use Cost; the protection area and thickness of the airbag are larger, so as to provide more effective protection for the human body.

Description of drawings

1 is a schematic view of wearing a wearable hip protection airbag device with a fall warning function according to an embodiment of the present application;

2 is a schematic view of the deployment of a wearable hip protection airbag device with a fall warning function according to an embodiment of the present application;

3 is a schematic structural diagram of a main control box according to an embodiment of the present application;

4 is a schematic structural diagram of an airbag according to an embodiment of the present application;

FIG. 5 is a flowchart of a fall warning algorithm of a fall warning module according to an embodiment of the present application.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application.

Please refer to FIG. 1 and FIG. 2 , FIG. 1 is a schematic view of wearing a wearable hip protection airbag device with a fall warning function according to an embodiment of the present application, and FIG. 2 is a wearable hip protection safety device with a fall warning function according to an embodiment of the present application. Schematic diagram of the deployment of the airbag device. The wearable hip protection airbag device with a fall warning function according to the embodiment of the present application includes an inner waistband 10 and an outer waistband 20. The inner waistband 10 is worn on the waist of the monitor, and the front side of the waistband 10 close to the human skin is installed with a device for collecting the human body in real time. Nine-axis inertial sensor for motion data (not shown). The inner waistband 10 has elasticity, its two ends are movably connected by a first fixing component (not shown), and the length can be adjusted according to the waist circumference of the monitor. A folded airbag 21 is installed on the rear and inner side of the outer waistband 20; a main control box bag 22 is arranged on the front and outer side of the outer waistband 20, the main control box 23 is installed in the main control box bag 22, and the main control box bag 22 is also provided with Zipper 11. Both ends of the outer belt 20 are respectively provided with an adjustment belt 24 and a second fixing assembly (not shown), which are worn on the waist of the monitor and located outside the inner belt 10 through the adjustment belt 24 and the second fixing assembly, and the outer belt 20 The length can be adjusted by adjusting the strap 24 .

Further, please refer to FIG. 3 and FIG. 4 , FIG. 3 is a schematic structural diagram of a main control box according to an embodiment of the present application, and FIG. 4 is a structural schematic diagram of an airbag according to an embodiment of the present application. The main control box 22 is provided with a main control board 221, a battery 222, an electric steering gear 223, a two-way cam 224, a two-way puncturing device 225 and a carbon dioxide compressed gas cylinder 226; the main control board 221 includes a fall warning module (not shown) , and are respectively connected with the nine-axis inertial sensor and the electric steering gear 223; the battery 222 is connected with the electric steering gear 223 to supply power to the electric steering gear 12; the bidirectional cam 224 is located above the electric steering gear 223, and is connected with the bidirectional piercing device 225 connection; the number of carbon dioxide compressed gas cylinders 226 is two, and the two carbon dioxide compressed gas cylinders 226 are respectively fixed on the left and right ends of the two-way puncturing device 225 through standard threads, and the left and right ends of the two-way puncturing device 225 are respectively provided with. The lancet (not shown) corresponds to the position of the carbon dioxide compressed gas cylinder. The left and right sides of the main control box 22 are respectively provided with an interface 25 , and the left and right sides of the airbag 21 are respectively provided with air conduits 14 , and the other end of the air conduit 14 is connected to the interface 25 on the same side.

In the embodiment of the present application, the carbon dioxide compressed gas cylinder 226 is an 8 g carbon dioxide compressed gas cylinder. By setting an independent main control box bag to fix the main control box, it is convenient to put in and take out the main control box and replace the carbon dioxide compressed gas cylinder.

As shown in FIG. 2, the main control box bag 22 is also provided with a small transparent window 26, and the main control box 23 is also provided with a switch button 27 for controlling the power supply, an adjustment button 28 for adjusting the volume of the sound, and a For the one-touch call button 29 for emergency calls, the small window 26 corresponds to the positions of the three buttons, and the user can view the buttons through the small window and perform corresponding operations on the buttons as required.

Based on the above structure, the working principle of the wearable hip protection airbag device with a fall warning function according to the embodiment of the present application is as follows: first, the inner belt 10 is worn on the waist of the monitor, so that the nine-axis inertial sensor is located at the monitor's center of gravity, And adjust the length of the inner waistband according to the waist circumference of the monitor through the first fixing assembly; secondly, fix the outer waistband 20 on the outside of the inner waistband 10 by adjusting the belt 24 and the second fixing assembly, and make the airbag 15 located behind the waist of the monitor. Then, the power is turned on through the switch button 27, and after the attitude calibration is performed by the nine-axis inertial sensor, the human body motion data is collected in real time, and the collected human body motion data is transmitted to the main control board 221; the fall warning module in the main control board 221 The fall early warning algorithm based on data statistics is used to analyze the human movement data in real time, to judge whether the current movement of the monitor belongs to a fall movement; when a fall movement is detected, an iterative early warning signal is generated, and the fall early warning signal is converted into electrical signals through the main control board 221 signal, and control the electric steering gear 223 to drive the two-way cam 224 to rotate, and the two-way cam 224 converts the rotary motion of the electric steering gear 223 into a linear motion, so as to push the two needles on the left and right sides of the two-way piercing device 225 to move to both sides and Puncture the left and right carbon dioxide compressed gas cylinders 226, so that the carbon dioxide compressed gas cylinder 226 releases carbon dioxide gas, and the carbon dioxide gas is inflated into the folded airbag 21 through the air guide 14, so that the airbag 21 is quickly inflated and rapidly unfolded, A fan-shaped cushion with an area of 0.23㎡ and a thickness of 6.2cm is formed to protect the hips and buttocks of the monitor who is about to fall. At the same time, the main control board 221 remotely transmits the fall information to a preset terminal device of the guardian, so that the guardian can take rescue measures in time. The fall information sent includes, but is not limited to, the wearable hip protection airbag device number, fall time, and fall location information with a fall warning function. The guardian can configure a wearable hip protection airbag device with a fall warning function through the terminal device. related parameters, and perform operations such as setting status query, fall data query or upload, and remote shutdown.

In the above, the main control board 221 uses three hybrid positioning methods of GPS/Beidou, WiFi or base station to perform real-time positioning, so as to achieve accurate indoor or outdoor positioning.

Further, please refer to FIG. 5 , which is a flowchart of a fall warning algorithm of the fall warning module according to the embodiment of the present application. The fall warning algorithm of the fall warning module specifically includes:

S1: Obtain the human motion data collected by the nine-axis inertial sensor; the human motion data includes but is not limited to three-axis acceleration (acc_x, acc_y, acc_z), three-axis attitude angle data (roll, pitch, yaw), etc.;

S2: Calculate the resultant acceleration of the current action according to the human body motion data, and judge whether the current action belongs to a fall-like action or a daily action according to the resultant acceleration. If it is a daily action, end the calculation and execute S1 again; otherwise, execute S3;

Among them, the daily movements of the human body usually include walking, jogging, sitting and standing up, squatting and standing up, slowly lying down, going up stairs, going down stairs, jumping, etc. Among them, violent jumping, fast going down stairs, fast lying down, etc. are more severe The daily movements of 's are similar to falling movements in the characteristics of the resultant acceleration, and are called fall-like movements. Therefore, the embodiment of the present application distinguishes between daily actions and fall-like actions according to the change speed of the combined acceleration during exercise. If the current action is a daily action, the calculation is ended, the calculation process is reduced, and the power consumption is reduced.

S3: According to the attitude angle data, determine whether the current action is a real fall action or a relatively intense daily action. If it is a relatively intense daily action, end the calculation and execute S1 again; otherwise, execute S4;

Among them, although violent jumping, quickly descending stairs, and quickly lying down are similar to falling movements in acceleration, their attitude angle changes are different from falling movements, and the attitude angle changes in different falling directions are not the same. For example, when the fall direction is left or right, the pitch angle is different. When the fall direction is backward, the pitch angle does not change much, but the roll angle changes greatly. Therefore, this application In the embodiment, by setting the attitude angle limit thresholds of different fall directions, if the attitude angle data of the current action reaches the set attitude angle limit threshold, it is determined that the action is a real fall action, otherwise, it is determined that the action is a fall-like action, thereby. Reduce the false alarm rate of early warning of falls and improve the accuracy of early warning.

S4: Generate a fall warning signal.

Based on the above, the wearable hip protection airbag device with a fall warning function according to the embodiment of the present application adopts an inner and outer double belt structure, and the sensor is fixed by the inner belt, so as to collect human motion data more stably; the airbag is installed through the outer belt, and the The independent main control box will not affect the overall performance of the large-area airbag, and it is more beautiful; the fall warning algorithm based on data statistics is used to calculate the fall action in real time, with a small amount of calculation, high accuracy and low false alarm rate. ; The airbag is inflated by two 8g carbon dioxide compressed gas cylinders. Compared with a single 16g carbon dioxide compressed gas cylinder, the release of the same mass of carbon dioxide gas can save 26.5% of the time, thus greatly shortening the warning time, and the carbon dioxide compressed gas The bottle can be replaced, which greatly reduces the cost of repeated use; the protection area and thickness of the airbag are larger, thus providing more effective protection for the human body.

The above description of the disclosed embodiments enables any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined in this application may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

A wearable hip protection airbag device with a fall warning function is characterized in that it comprises an inner waistband and an outer waistband, the inner waistband and the outer waistband are respectively worn on the waist of a guardian, and the outer waistband is located outside the inner waistband A sensor for collecting human motion data is installed on the inner waistband; an airbag is installed on the rear inner side of the outer waistband, and a main control box is arranged on the front and outer side of the outer waistband, and the main control box includes a main control box. board, a two-way puncturing device and a carbon dioxide compressed gas cylinder; the main control board is connected to a sensor, the number of the carbon dioxide compressed gas cylinders is two, and the two carbon dioxide compressed gas cylinders are respectively fixed on the two-way puncturing device The left and right ends of the airbag; the airbag is connected to the main control box through the airway; the main control board is used to obtain the human body motion data collected by the sensor, and uses the fall warning algorithm to identify the fall action. action, the two-way piercing device is controlled to pierce the carbon dioxide compressed gas cylinder to inflate the airbag, so as to protect the guardian in the event of a fall.
The wearable hip protection airbag device with fall warning function according to claim 1, wherein the left and right ends of the two-way puncturing device are further provided with puncture needles, and the puncture needle and the carbon dioxide compressed gas cylinder are respectively provided with puncture needles. corresponding position.
The wearable hip protection airbag device with fall warning function according to claim 2, wherein the main control box is further provided with a battery, an electric steering gear and a two-way cam, and the battery is connected to the electric steering gear , used to supply power to the electric steering gear; the electric steering gear is connected to the main control board, the two-way cam is located above the electric steering gear, and is connected to the two-way piercing device; if a fall action is recognized, the The main control board controls the electric steering gear to drive the bidirectional cam to rotate, and the rotary motion of the electric steering gear is converted into a linear motion through the bidirectional cam, and the two needles at the left and right ends of the bidirectional piercing device are pushed to move to both sides and puncturing the carbon dioxide compressed gas bottle, so that the carbon dioxide compressed gas bottle releases carbon dioxide gas, and the carbon dioxide gas is inflated into the airbag through the air guide tube.
The wearable hip protection airbag device with a fall warning function according to claim 3, wherein the main control board is further provided with a fall warning module, and the fall warning module adopts a fall warning algorithm based on data statistics Analyze the human body movement data to determine whether the current action is a fall action, and when a fall action is identified, an iterative early warning signal is generated, and the fall early warning signal is converted into an electrical signal through the main control board to control the electric rudder The machine drives the bidirectional cam to rotate.
The wearable hip protection airbag device with a fall warning function according to claim 4, wherein the fall warning algorithm is specifically:

acquiring human body motion data collected by the sensor; the human body motion data includes three-axis acceleration and three-axis attitude angle data;

Calculate the resultant acceleration of the current movement according to the three-axis acceleration, and judge whether the current movement belongs to a fall-like movement or a daily movement according to the resultant acceleration; if it belongs to a fall-like movement,

According to the attitude angle data, it is judged whether the current action is a real falling action or an intense daily action, and if it is a real falling action, a fall warning signal is generated.
The wearable hip protection airbag device with fall warning function according to any one of claims 1 to 5, wherein a main control box bag is further provided on the front and outer side of the outer waistband, and the main control box is installed In the main control box bag, the main control box bag is also provided with a zipper.
The wearable hip protection airbag device with fall warning function according to claim 6, wherein the main control box bag is further provided with a small transparent window, and the main control box is also provided with a small transparent window. The small window corresponds to the positions of the three buttons for the on/off button for controlling the power supply, the adjustment button for adjusting the volume of the sound and the one-key call button for emergency calling.
The wearable hip protection airbag device with fall warning function according to claim 1, wherein the inner waistband has elasticity, and the two ends of the inner waistband are movably connected by a first fixing component.
The wearable hip protection airbag device with fall warning function according to claim 8, wherein the two ends of the outer waistband are respectively provided with an adjustment belt and a second fixing component, which pass through the adjustment belt and the first Two fixing components are fixed on the outer side of the inner waistband, and the length is adjusted by the adjusting belt.
The wearable hip protection airbag device with fall warning function according to claim 1 or 3, wherein the inflated airbag is a fan-shaped cushion with an area of 0.23 square meters and a thickness of 6.2 cm.