A method and device for standardizing sit-and-reach test

Abstract

The present invention relates to a method and device for standardizing a sit-and-reach test, and belongs to the field of physical fitness testing. When a subject is performing a sit-and-reach test, a wireless image acquisition module acquires images of the subject's limb movements, a first distributed flexible pressure wireless acquisition module and a light intensity wireless acquisition module respectively acquire pressure and light intensity sequence data on the seat cushion of the sit-and-reach tester, and a second distributed flexible pressure wireless acquisition module acquires pressure sequence data on the pedal of the sit-and-reach tester. The above images and data are wirelessly transmitted to a wireless data processing module to determine whether the subject's current movements are standardized, and the wireless data processing module controls a wireless sound and light display module to prompt the subject's movements to be standardized, thereby achieving standardization of the subject's sit-and-reach movements. The present invention has the advantages of not requiring manual observation, being able to prevent cheating by subjects and related testers, and being able to quickly achieve automated determination of the degree of standardization of sit-and-reach movements.

Description

Technical Field

[0001] The invention relates to a method and a device for standardizing sit-and-reach test, and in particular to a test process for standardizing sit-and-reach test using a sensor network, and belongs to the field of physical fitness test. Background Art

[0002] The sit-and-reach test is a test of the maximum range of motion that a person's trunk, waist, hip and other joints can achieve in a static state. It is an important test for evaluating body flexibility in the "National Physical Fitness Measurement Standards". The standard test method is: "During the test, the subject sits on a mat with legs straight, heels together, toes naturally apart, and the entire sole of the foot on the tester flat board; then the palms face down, arms together and stretched out, upper body bent forward, and the middle fingertips of both hands are used to push the cursor forward smoothly until it cannot move. Test twice, take the maximum value, record in centimeters, and keep one decimal place." The old sit-and-reach tester focuses mainly on the measurement function of the horizontal distance from the fingertips to the sole of the foot during forward flexion, but lacks attention and design to whether the sit-and-reach test process is standardized. For example, old-style sit-and-reach testers often use straps or baffles to ensure that the legs are straight, and rely on manual observation to ensure that the sit-and-reach movements are standardized. This is not only time-consuming and laborious, but also when there are many testers, there will be an irregular testing process in which the test subjects do not fix their legs and perform irregular movements such as bending their knees and legs to obtain false test scores.

[0003] In order to ensure the standardization and convenience of the test process, the sit-and-reach tester disclosed in application number 201911069536.8 integrates multiple sensors and has a complex mechanical adjustment structure. If all the old sit-and-reach testers are replaced, it will not only be expensive, but also cause a waste of resources of a large number of existing old sit-and-reach testers; the sit-and-reach tester disclosed in application number 201610915452.1 adopts a single machine vision solution, which is easily affected by the complex lighting of the measured environment, thereby reducing the reliability of its standardized test process. Therefore, there is an urgent need for a low-cost, simple-structured, and highly reliable device that can standardize the measurement process of the old sit-and-reach tester.

[0004] At the same time, in 2019, my country proposed in the "Outline for Building a Strong Sports Nation" that "by 2035, the proportion of urban and rural residents who meet or exceed the "National Physical Fitness Test Standards" will exceed 92%." How to make full use of the large number of existing old-style reach-bend testers to realize large-scale standardized sit-and-reach bend testing among the entire population has become an urgent problem to be solved. Summary of the invention

[0005] The purpose of the present invention is to solve the problem of non-standard testing of old-style sit-and-reach testers and the need for standardized testing of a large number of people, and to propose a method and device for standardized sit-and-reach test. The device has low cost, simple structure, and high reliability, and can be directly coordinated with the old-style sit-and-reach tester. While making full use of a large number of existing old-style sit-and-reach testers, the standardization of the test process is guaranteed. At the same time, the test method can quickly realize the automated judgment of the standardization degree of sit-and-reach action, thereby providing a solution for large-scale standardized sit-and-reach test for the whole people.

[0006] The purpose of the present invention is achieved through the following technical solutions.

[0007] A device for standardizing sit-and-reach test mainly comprises: a sit-and-reach tester, a wireless image acquisition module, a first distributed flexible pressure wireless acquisition module, a light intensity wireless acquisition module, a second distributed flexible pressure wireless acquisition module, a wireless data processing module and a wireless sound and light display module.

[0008] The sit-and-reach tester is a common sit-and-reach tester on the market.

[0009] The first distributed flexible pressure wireless acquisition module and the light intensity wireless acquisition module are installed on the seat cushion of the sit-and-reach tester; the second distributed flexible pressure wireless acquisition module is installed on the foot pedal of the sit-and-reach tester; the wireless image acquisition module is placed on the side of the sit-and-reach tester, perpendicular to the side of the subject, and its image acquisition area is adjusted to align with the subject; the wireless data processing module and the wireless sound and light display module are placed on the side of the sit-and-reach tester.

[0010] When the subject is doing the sit-and-reach test, the wireless image acquisition module acquires the subject's limb movement images, the first distributed flexible pressure wireless acquisition module and the light intensity wireless acquisition module respectively acquire the pressure and light intensity sequence data on the seat cushion of the sit-and-reach tester, and the second distributed flexible pressure wireless acquisition module acquires the pressure sequence data on the pedal of the sit-and-reach tester. The above images and data are wirelessly transmitted to the wireless data processing module to determine whether the subject's current movement is standardized, and the wireless data processing module controls the wireless sound and light display module to prompt the subject to standardize the movement, thereby achieving the standardization of the subject's sit-and-reach movement.

[0011] The wireless image acquisition module includes an image acquisition submodule, a main control submodule, and a wireless transceiver submodule, and the image acquisition submodule and the control and data interfaces of the wireless transceiver submodule are all connected to the main control submodule. The main control submodule controls the image acquisition submodule to acquire the limb movement images of the subject, and sends the captured images to the wireless data processing module through the wireless transceiver submodule to determine whether it meets the sitting forward bending test specification of stretching legs, palms facing down, arms together and stretched out, upper body flexed forward, and using the middle fingertips of both hands to push the cursor to move smoothly forward.

[0012] The wireless image acquisition module also includes a fill light submodule, whose control interface is connected to the main control submodule. The wireless data processing module determines whether the current ambient light meets the conditions for stably identifying human joints based on the image information collected by the wireless image acquisition module. If not, the wireless data processing module sends an instruction to the main control submodule in the wireless image acquisition module, and the main control submodule controls the fill light submodule in the wireless image acquisition module to fill light.

[0013] The first distributed flexible pressure wireless acquisition module includes a plurality of thin film flexible pressure sensors, a main control submodule, and a wireless transceiver submodule. The data and control interfaces of the plurality of thin film flexible pressure sensors and the wireless transceiver submodule are connected to the main control submodule. The main control submodule controls the plurality of thin film flexible pressure sensors to acquire pressure sequence data on the seat cushion of the sitting forward flexion tester, and sends the data to the wireless data processing module through the wireless transceiver submodule to determine whether the test subject's legs are straightened and close to the seat cushion.

[0014] The light intensity wireless acquisition module includes a plurality of light intensity acquisition sensors, a main control submodule, and a wireless transceiver submodule. The data and control interfaces of the plurality of light intensity acquisition sensors and the wireless transceiver submodule are connected to the main control submodule. The main control submodule controls the plurality of light intensity acquisition sensors to acquire light intensity sequence data on the seat cushion of the sitting forward flexion tester, and sends the data to the wireless data processing module through the wireless transceiver submodule to determine whether the test subject's legs are straight and close to the seat cushion.

[0015] The second distributed flexible pressure wireless acquisition module includes a plurality of thin film flexible pressure sensors, a main control submodule, and a wireless transceiver submodule. The data and control interfaces of the plurality of thin film flexible pressure sensors and the wireless transceiver submodule are connected to the main control submodule. The main control submodule controls the plurality of thin film flexible pressure sensors to acquire pressure sequence data on the pedal of the sit forward flexion tester, and sends the data to the wireless data processing module through the wireless transceiver submodule to determine whether the heels of the test subject are close together and whether the entire sole of the foot is on the pedal of the sit forward flexion tester.

[0016] The wireless data processing module includes an embedded signal processing and controller and a wireless transceiver submodule, and the data and control interface of the wireless transceiver submodule is connected to the embedded signal processing and controller. The embedded signal processing and controller determines whether the subject's sitting forward bending action is standard based on the image data of the wireless image acquisition module, the pressure sequence data of the first distributed flexible pressure wireless acquisition module, the light intensity sequence data of the light intensity wireless acquisition module, and the pressure sequence data of the second distributed flexible pressure wireless acquisition module, and wirelessly transmits the result to the wireless sound and light display module for sound and light prompts. The embedded signal processing and controller realizes communication and control with the wireless image acquisition module, the first distributed flexible pressure wireless acquisition module, the light intensity wireless acquisition module, the second distributed flexible pressure wireless acquisition module, and the wireless sound and light display module through the wireless transceiver submodule.

[0017] The wireless sound and light display module includes a display screen and a sound system, a main control submodule and a wireless transceiver submodule, wherein the display screen and the sound system are connected to the audio and video output interface of the main control submodule, and the data and control interface of the wireless transceiver submodule is connected to the main control submodule. The main control submodule controls the display screen and the sound system to prompt the subject whether the action is normal in the form of optical display and sound according to the control instruction sent by the wireless data processing module received by the wireless transceiver submodule.

[0018] A method for standardizing a sit-and-reach test comprises the following steps:

[0019] Step 1: Turn on the power switches of the wireless image acquisition module, the first distributed flexible pressure wireless acquisition module, the light intensity wireless acquisition module, the second distributed flexible pressure wireless acquisition module, the wireless data processing module and the wireless sound and light display module. Each module completes initialization and pairing. The wireless data processing module controls the wireless sound and light display module to indicate that the display device is ready and the sound and light signal test can be started.

[0020] Step 2: The subject sits on the cushion of the sit-and-reach tester with legs straight, heels together, toes naturally apart, and the entire sole of the foot on the foot pedal of the sit-and-reach tester to prepare for the sit-and-reach test.

[0021] Step 3: The wireless image acquisition module continuously takes multiple images and transmits them to the wireless data processing module. The wireless data processing module determines whether the current ambient light meets the conditions for stable identification of human joints. If not, the wireless data processing module sends a control instruction to the main control submodule in the wireless image acquisition module. The main control submodule in the wireless image acquisition module controls the fill light submodule to perform fill light until the condition is met.

[0022] Step 4. The pressure sequence data collected by the first distributed flexible pressure wireless collection module and the light intensity sequence data collected by the light intensity wireless collection module are transmitted to the wireless data processing module. The wireless data processing module determines whether the legs are straight and close to the cushion by judging whether the pressure sequence data is continuously greater than the set cushion pressure threshold and whether the light intensity sequence data is continuously less than the light intensity threshold. If the continuity condition is not met, the wireless data processing module controls the wireless sound and light display module to prompt the subject to straighten his legs and keep them close to the cushion until the condition is met.

[0023] Step 5. The second distributed flexible pressure wireless acquisition module transmits the pressure sequence data to the wireless data processing module. The wireless data processing module determines whether the heels are close together and whether the entire sole of the foot is on the pedal of the sit-and-reach tester by judging whether the pressure sequence data is continuously greater than the set pedal pressure threshold condition. If the continuous condition is not met, the wireless data processing module controls the wireless sound and light display module to prompt the subject to keep his heels together and the entire sole of the foot on the pedal of the sit-and-reach tester until the condition is met.

[0024] Step 6: The wireless data processing module controls the wireless sound and light display module to prompt the subject to prepare for the movement standard and start the sit-and-reach test.

[0025] Step 7: After hearing the command from the wireless sound and light display module, the subject places his palms downward, stretches his arms together, bends his upper body forward, and uses the tips of his middle fingers to push the cursor forward smoothly until it cannot move.

[0026] During the sit-and-reach test, the wireless image acquisition module acquires images in real time, the first distributed flexible pressure wireless acquisition module, the light intensity wireless acquisition module and the second distributed flexible pressure wireless acquisition module synchronously acquire sequence data in real time, and the above images and data are wirelessly transmitted to the wireless data processing module, which analyzes the images and data to determine whether the subject's movements are standard.

[0027] The wireless data processing module determines whether the subject's movements are standard, specifically judging the following three parts:

[0028] Part 1: The wireless data processing module determines whether the subject's arms are close together and stretched out, whether the upper body posture is bent forward, whether the cursor is pushed smoothly with the fingertips, and whether the set threshold time is maintained stably during the sit-and-reach test based on the images collected in real time by the wireless image acquisition module.

[0029] Part 2: The pressure sequence data collected by the first distributed flexible pressure wireless collection module and the light intensity sequence data of the light intensity wireless collection module are transmitted to the wireless data processing module. The wireless data processing module determines according to step 4 whether the pressure sequence data is continuously greater than the set seat pressure threshold and whether the light intensity sequence data is continuously less than the light intensity threshold condition, thereby determining whether the legs are straight and close to the seat cushion.

[0030] Part 3: The second distributed flexible pressure wireless acquisition module transmits the pressure sequence data to the wireless data processing module. The wireless data processing module determines whether the pressure sequence data is continuously greater than the set pedal pressure threshold condition according to step five, thereby determining whether the heels are close together and whether the entire sole of the foot is on the pedal of the sit-and-reach tester.

[0031] If the above three parts meet the conditions, the wireless data processing module controls the wireless sound and light module to prompt the subject and test the action specifications.

[0032] If any of the above three parts does not meet the conditions, the wireless data processing module controls the wireless sound and light module to remind the subject that the test action is not standardized and the test result is invalid. Please re-test according to the specifications and repeat steps 2 to 7.

[0033] Step 8: The wireless data processing module controls the wireless sound and light module to remind the subject that the test result is valid and the test is ended.

[0034] The algorithm for determining whether the current ambient lighting meets the requirements for stable identification of human joints described in step 3 is as follows: based on the N images collected by wireless imaging, the key points of the human legs, hands, arms and upper body in each image are identified using the human key point identification algorithm, and the number of key points in each image is compared to see whether it is equal to a preset value. If the number of key points in any of the N images is lower than the preset value, it is considered that the ambient lighting does not meet the requirements for stable identification of human joints.

[0035] The algorithm for judging whether the pressure sequence data is continuously greater than the set cushion pressure threshold and the light intensity sequence data is continuously less than the light intensity threshold in step 4, thereby judging whether the legs are straightened and close to the cushion, is as follows: extract the subscripts in the pressure sequence data that are greater than the set cushion pressure threshold and the subscripts in the light intensity sequence data that are less than the light intensity threshold, and judge whether the extracted subscripts are continuous. If there are discontinuous subscripts, it is considered that the legs are not straightened and not close to the cushion.

[0036] The algorithm for judging whether the pressure sequence data is continuously greater than the threshold condition of the pedal pressure set in step 5, thereby judging whether the heels are close together and whether the soles of the feet are pressed on the pedals of the sit forward flexion tester, is as follows: extract the subscripts of the pressure sequence data that are greater than the pedal pressure threshold, and judge whether the extracted subscripts are continuous. If there are discontinuous subscripts, it is considered that the heels are not close together and the soles of the feet are not completely pressed on the pedals of the sit forward flexion tester.

[0037] The algorithm for judging whether the subject's arms are together and stretched out during the sitting forward flexion test, whether the upper body posture is bent forward, whether the cursor is pushed smoothly with the fingertips, and whether the set threshold time is maintained stably as described in step seven is: set a preset value of the angle of the key points of the human body when the arms are together and stretched out, and a preset value of the angle of the key points of the human body when the upper body posture is bent forward, and calculate the measured value of the angle of the key points of the human body when the arms are together and stretched out and the measured value of the angle of the key points of the human body when the upper body posture is bent forward according to the subject image taken in real time by the wireless image acquisition module; if the measured value of the angle of the key points of the human body when the arms are together and stretched out is less than or equal to the preset value of the angle of the key points of the human body when the arms are together and stretched out, then the arms are determined to be together and stretched standard; if the measured value of the angle of the key points of the human body when the upper body posture is bent forward is less than or equal to the preset value of the angle of the key points of the human body when the upper body posture is bent forward, then the upper body posture is determined to be bent forward standard. Subsequently, the wireless data processing module extracts the distance and movement information between the edge of the human finger and the cursor based on the subject image taken in real time by the wireless image acquisition module. If the distance is less than the contact preset value and the cursor moves in a slow straight line, it is determined that the fingertip smoothly pushes the cursor. When the movement stops, the cursor stationary holding time is calculated based on the subject image taken in real time by the wireless image acquisition module. If the stationary holding time is greater than the set threshold time, it is determined that the stable hold is completed.

[0038] Beneficial effects:

[0039] (1) A method and device for standardized sit-and-reach test, which does not require manual observation, can prevent cheating by subjects and related test personnel, and can quickly realize automatic determination of the standardization degree of sit-and-reach action.

[0040] (2) A method and device for standardizing the sit-and-reach test, which can be used in conjunction with an old sit-and-reach tester. Compared with purchasing a new sit-and-reach tester, the method and device have the advantages of low cost, simple structure, and high reliability, while effectively ensuring the standardization of the sit-and-reach test process. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 The figure is a flow chart of a method according to a specific embodiment of the present invention.

[0042] Figure 2 It is a schematic diagram of the first distributed flexible pressure wireless acquisition module in a specific implementation manner of the present invention.

[0043] Figure 3 It is a schematic diagram of the light intensity wireless acquisition module in a specific implementation manner of the present invention.

[0044] Figure 4 The figure is a schematic diagram of a wireless image acquisition module in a specific implementation manner of the present invention.

[0045] in,

[0046] 1-wireless image acquisition module, 2-first distributed flexible pressure wireless acquisition module, 3-light intensity wireless acquisition module, 4-wireless data processing module.

[0047] In 1-wireless image acquisition module, 11-image acquisition submodule, 12-fill light submodule, 13-power switch, 14-rechargeable power supply, 15-main control submodule, 16-wireless transceiver submodule.

[0048] In 2-the first distributed flexible pressure wireless acquisition module, 21-220 correspond to 20 groups of thin film flexible pressure sensors of the same type, 221-rechargeable power supply, 222-power switch, 223-main control submodule, 224-wireless transceiver submodule.

[0049] In the 3-light intensity wireless acquisition module, 31-320 correspond to 20 groups of infrared sensor switches of the same type, 321-rechargeable power supply, 322-power switch, 323-main control submodule, 324-wireless transceiver submodule. DETAILED DESCRIPTION

[0050] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0051] A device for standardizing sit-and-reach test, comprising: a sit-and-reach tester, a wireless image acquisition module 1, a first distributed flexible pressure wireless acquisition module 2, a light intensity wireless acquisition module 3, a second distributed flexible pressure wireless acquisition module, a wireless data processing module 4 and a wireless sound and light display module.

[0052] in:

[0053] Wireless image acquisition module 1, its principle is as follows Figure 4As shown, it includes: an image acquisition submodule 11, a fill light submodule 12, a power switch 13, a rechargeable power supply 14, a main control submodule 15, and a wireless transceiver submodule 16, which are used to shoot and record the subject's body movement images and video data. Among them, the image acquisition submodule 11 has a power supply interface connected to the power switch 13, and a video output interface connected to the video data interface of the main control submodule 15. The fill light submodule 12 has five levels of adjustable brightness, and its power supply interface is connected to the power switch 13, and the brightness control interface is connected to the brightness control interface of the main control submodule 15. The power switch 13 is used to control the power on and off of the wireless image acquisition module 1, one end of which is connected to the rechargeable power supply 14, and the other end is connected to the power supply interfaces of the image acquisition submodule 11, the fill light submodule 12, the main control submodule 15, and the wireless transceiver submodule 16. The rechargeable power supply 14 is used to provide power to other modules in the wireless image acquisition module 1 and is connected to the power switch 13. The main control submodule 15 is used to control the wireless transceiver submodule 16 to transmit the image and video data collected by the image acquisition submodule 11, and to control the working modes of the image acquisition submodule 11, the fill light submodule 12, the main control submodule 15, and the wireless transceiver submodule 16. The video data interface of the main control submodule 15 is connected to the image acquisition submodule 11, the brightness control interface is connected to the fill light submodule 12, the wireless data transceiver interface is connected to the wireless transceiver submodule 16, and the power supply interface is connected to the power switch 13. The wireless transceiver submodule 16 is used for wireless communication with the wireless data processing module 4, and its data interface is connected to the wireless data transceiver interface of the main control submodule 15, and the power supply interface is connected to the power switch 13.

[0054] The first distributed flexible pressure wireless acquisition module 2, its principle is as follows Figure 2As shown, it includes: 20 groups of thin film flexible pressure sensors 21-220 of the same type, a rechargeable power supply 221, a power switch 222, a main control submodule 223, and a wireless transceiver submodule 224. Among them, the 20 groups of thin film flexible pressure sensors 21-220 of the same type convert the pressure changes of the corresponding positions of 20 groups into resistance changes, and their data interfaces are connected to the signal acquisition interface of the main control submodule 223, and the power supply interface is connected to the power switch 222. The rechargeable power supply 221 is used to power other modules in the first distributed flexible pressure wireless acquisition module 2 and is connected to the power switch 222. The power switch 222 is used to control the power on and off of the first distributed flexible pressure wireless acquisition module 2, one end of which is connected to the rechargeable power supply 221, and the other end is connected to the power supply interface of 20 groups of thin film flexible pressure sensors 21-220 of the same type, the main control submodule 223, and the wireless transceiver submodule 224. The main control submodule 223 is used to control 20 groups of thin film flexible pressure sensors 21-220 of the same type to collect pressure sequence data and control the wireless transceiver submodule 224 to send the pressure sequence data to the wireless data processing module 4. The signal acquisition interface is connected to the 20 groups of thin film flexible pressure sensors 21-220 of the same type, the wireless data transceiver interface is connected to the wireless transceiver submodule 224, and the power supply interface is connected to the power switch 222. The wireless transceiver submodule 224 is used for wireless communication with the wireless data processing module 4. Its data interface is connected to the wireless data transceiver interface of the main control submodule 223, and the power supply interface is connected to the power switch 222.

[0055] Light intensity wireless acquisition module 3, its principle is as follows Figure 3As shown, it includes: 20 groups of infrared sensor switches 31-320 of the same type, a rechargeable power supply 321, a power switch 322, a main control submodule 323, and a wireless transceiver submodule 324. Among them, the 20 groups of infrared sensor switches 31-320 of the same type convert the light intensity of the corresponding positions of 20 groups into current changes, and its data interface is connected to the signal interface of the main control submodule 323, and the power supply interface is connected to the power switch 322. The rechargeable power supply 321 is used to power other modules in the light intensity wireless acquisition module 3 and is connected to the power switch 322. The power switch 322 is used to control the power on and off of the light intensity wireless acquisition module 3, one end of which is connected to the rechargeable power supply 321, and the other end is connected to the power supply interface of the 20 groups of infrared sensor switches 31-320 of the same type, the main control submodule 323, and the wireless transceiver submodule 324. The main control submodule 323 is used to control 20 groups of infrared sensor switches 31-320 of the same type to collect light intensity sequence data and control the wireless transceiver submodule 324 to send the light intensity sequence data to the wireless data processing module 4. The sensor data interface is connected to the 20 groups of infrared sensor switches 31-320 of the same type, the wireless data transceiver interface is connected to the wireless transceiver submodule 324, and the power supply interface is connected to the power switch 322. The wireless transceiver submodule 324 is used for wireless communication with the wireless data processing module 4. Its data interface is connected to the wireless data transceiver interface of the main control submodule 323, and the power supply interface is connected to the power switch 322.

[0056] The second distributed flexible pressure wireless acquisition module has the same principle and structure as the first distributed flexible pressure wireless acquisition module 2. It includes: 20 groups of thin film flexible pressure sensors of the same type, a rechargeable power supply, a power switch, a main control submodule, and a wireless transceiver submodule. Among them, the 20 groups of thin film flexible pressure sensors of the same type convert the pressure changes of the corresponding positions of 20 groups into resistance changes, and their data interfaces are connected to the signal acquisition interface of the main control submodule, and the power supply interface is connected to the power switch. The rechargeable power supply is used to power other modules in the second distributed flexible pressure wireless acquisition module and is connected to the power switch. The power switch is used to control the power on and off of the second distributed flexible pressure wireless acquisition module, one end of which is connected to the rechargeable power supply, and the other end is connected to the power supply interface of 20 groups of thin film flexible pressure sensors of the same type, the main control submodule, and the wireless transceiver submodule. The main control submodule is used to control 20 groups of thin film flexible pressure sensors of the same type to collect pressure sequence data and control the wireless transceiver submodule to send the pressure sequence data to the wireless data processing module 4, the signal acquisition interface is connected to 20 groups of thin film flexible pressure sensors of the same type, the wireless data transceiver interface is connected to the wireless transceiver submodule, and the power supply interface is connected to the power switch. The wireless transceiver submodule is used for wireless communication with the wireless data processing module 4, and its data interface is connected to the wireless data transceiver interface of the main control submodule, and its power supply interface is connected to the power switch.

[0057] The wireless data processing module includes: an embedded signal processing and controller, a rechargeable power supply, a power switch, and a wireless transceiver submodule. Among them, the embedded signal processing and controller is used to determine whether the subject's limb movements are standardized and send control instructions. Its power supply interface is connected to the power switch, and its wireless data interface is connected to the wireless transceiver submodule. The rechargeable power supply is used to power other modules in the wireless data processing module and is connected to the power switch. The power switch is used to control the power on and off of the wireless data processing module. One end is connected to the rechargeable power supply, and the other end is connected to the embedded signal processing and controller and the wireless transceiver submodule. The wireless transceiver submodule is used to communicate with the wireless image acquisition module, the first distributed flexible pressure wireless acquisition module, the light intensity wireless acquisition module, the second distributed flexible pressure wireless acquisition module and the wireless sound and light display module. Its data interface is connected to the wireless data transceiver interface of the embedded signal processing and controller, and the power supply interface is connected to the power switch.

[0058] The wireless sound and light display module includes: a display screen, a speaker, a rechargeable power supply, a power switch, a main control submodule, and a wireless transceiver submodule. Among them: the display screen is used to play the standard action video, the recorded subject action video and related data information in the form of images, and its video interface is connected to the main control submodule, and its power supply interface is connected to the power switch. The speaker is used to play the standard action audio, the recorded subject action audio and related data information in the form of sound, and its audio interface is connected to the main control submodule, and its power supply interface is connected to the power switch. The rechargeable power supply is used to provide power to other modules in the wireless sound and light display module and is connected to the power switch. The power switch is used to control the power on and off of the wireless sound and light display module, one end of which is connected to the rechargeable power supply, and the other end is connected to the display screen, the speaker, the main control submodule, and the wireless transceiver submodule. The main control submodule is used to receive the control instructions and data transmitted by the wireless transceiver submodule, and at the same time control the display screen, and the speaker prompts the subject whether the action is standard in the form of video and audio. The video output interface of the main control submodule is connected to the display screen, the audio output interface is connected to the speaker, the wireless data transceiver interface is connected to the wireless transceiver submodule, and the power supply interface is connected to the power switch. The wireless transceiver submodule is used for wireless communication with the wireless data processing module, and its data interface is connected to the wireless data transceiver interface of the main control submodule, and the power supply interface is connected to the power switch.

[0059] The working principle of a device for standardizing the sit-and-reach test is as follows: when the subject is performing the sit-and-reach test, the wireless image acquisition module acquires the subject's limb movement images, the first distributed flexible pressure wireless acquisition module and the light intensity wireless acquisition module respectively acquire the pressure and light intensity sequence data on the seat cushion of the sit-and-reach tester, and the second distributed flexible pressure wireless acquisition module acquires the pressure sequence data on the foot pedal of the sit-and-reach tester. The above images and data are wirelessly transmitted to the wireless data processing module to determine whether the subject's current action is standard, and the wireless sound and light display module is controlled to prompt the subject to standardize the action, thereby realizing the standardization of the subject's sit-and-reach action.

[0060] A method for standardizing the sit-and-reach test, the method flow chart is as follows Figure 1 As shown, follow these steps to implement:

[0061] Step 1: Power on each module, complete initialization and pairing, and prompt the subject that the device is ready. Turn on the power switches of the wireless image acquisition module, the first distributed flexible pressure wireless acquisition module, the light intensity wireless acquisition module, the second distributed flexible pressure wireless acquisition module, the wireless data processing module, and the wireless sound and light display module. Each module completes initialization and pairing. The wireless data processing module controls the wireless sound and light display module to display that the device is ready and can start the sound and light signal of the test.

[0062] Step 2: The subject prepares for the sit-and-reach test. The subject sits on the seat cushion of the sit-and-reach tester, stretches his legs, puts his heels together, and naturally separates his toes. The whole sole of the foot is on the foot pedal of the sit-and-reach tester, and prepares for the sit-and-reach test.

[0063] Step 3: Determine whether the current ambient lighting meets the conditions for stable identification of human joints. The wireless image acquisition module continuously captures multiple images and transmits them to the wireless data processing module. The wireless data processing module determines whether the current ambient lighting meets the conditions for stable identification of human joints. If not, the wireless data processing module sends a control instruction to the main control submodule in the wireless image acquisition module. The main control submodule in the wireless image acquisition module controls the fill light submodule to perform fill light until the condition is met.

[0064] The algorithm for judging whether the current ambient lighting meets the requirements for stable identification of human joints is as follows: Based on the N images collected by wireless imaging, the human key point identification algorithm is used to identify the key points of the human legs, hands, arms and upper body in each image, and to compare whether the number of key points in each image is equal to the preset value. If the number of key points in any of the N images is lower than the preset value, it is considered that the ambient lighting does not meet the requirements for stable identification of human joints.

[0065] Step 4: Determine whether the legs are straight and close to the cushion of the sitting forward flexion tester. The pressure sequence data PZ1, PZ2, PZ3, PZ4...PZ20 collected by the first distributed flexible pressure wireless acquisition module and the light intensity sequence data L1, L2, L3, L4...L20 collected by the light intensity wireless acquisition module are transmitted to the wireless data processing module. The wireless data processing module determines whether the legs are straight and close to the cushion by determining whether the pressure sequence data is continuously greater than the set cushion pressure threshold PZLIM and whether the light intensity sequence data is continuously less than the light intensity threshold LLIM. If the continuous condition is not met, the wireless data processing module controls the wireless sound and light display module to prompt the subject to straighten his legs and press against the cushion until the condition is met.

[0066] The algorithm to determine whether the pressure sequence data is continuously greater than the set cushion pressure threshold PZLIM and the light intensity sequence data is continuously less than the light intensity threshold LLIM is as follows: extract the subscripts of the pressure sequence data PZ1, PZ2, PZ3, PZ4…PZ20 that are greater than the set cushion pressure PZLIM, and the subscripts of the light intensity sequence data L1, L2, L3, L4…L20 that are less than the light intensity threshold LLIM, and determine whether the extracted subscripts are continuous. If there is a discontinuous subscript, it is considered that the legs are not straight and not close to the cushion.

[0067] Step 5: Determine whether the heels are together and whether the soles of the feet are completely on the pedal of the sit-and-reach tester. The second distributed flexible pressure wireless acquisition module transmits the collected pressure sequence data PF1, PF2, PF3, PF4...PF20 to the wireless data processing module. The wireless data processing module determines whether the heels are together and whether the soles of the feet are on the pedal of the sit-and-reach tester by determining whether the pressure sequence data PF1, PF2, PF3, PF4...PF20 is continuously greater than the set pedal pressure threshold PFLIM condition. If the continuous condition is not met, the wireless data processing module controls the wireless sound and light display module to prompt the subject to keep the heels together and the soles of the feet on the pedal of the sit-and-reach tester until the condition is met.

[0068] The algorithm for judging whether the pressure sequence data PF1, PF2, PF3, PF4…PF20 are continuously greater than the threshold PFLIM of the set pedal pressure, thereby judging whether the heels are close together and whether the entire sole of the foot is pressed on the pedal of the sitting forward flexion tester is as follows: extract the subscripts of the pressure sequence data PF1, PF2, PF3, PF4…PF20 that are greater than the set pedal pressure threshold PFLIM, and judge whether the extracted subscripts are continuous. If there is a discontinuous subscript, it is considered that the heels are not close together and the entire sole of the foot is not completely pressed on the pedal of the sitting forward flexion tester.

[0069] Step 6: Prompt the subject to prepare for the standard movement and start the sit-and-reach test. The wireless data processing module controls the wireless sound and light display module to prompt the subject to prepare for the standard movement and start the sit-and-reach test.

[0070] Step 7: Determine whether the subject's movements are normal during the sit-and-reach test. After hearing the command from the wireless sound and light display module, the subject should face down with his palms, put his arms together and stretch them out, bend his upper body forward, and use the tips of his middle fingers to push the cursor forward smoothly until it cannot move.

[0071] During the sit-and-reach test, the wireless image acquisition module acquires images in real time, the first distributed flexible pressure wireless acquisition module, the light intensity wireless acquisition module and the second distributed flexible pressure wireless acquisition module synchronously acquire sequence data in real time, and the above images and data are wirelessly transmitted to the wireless data processing module, which analyzes the images and data to determine whether the subject's movements are standard.

[0072] The wireless data processing module determines whether the subject's movements are standard, specifically judging the following three parts:

[0073] Part 1: The wireless data processing module determines whether the subject's arms are close together and stretched out, whether the upper body posture is bent forward, whether the cursor is pushed smoothly with the fingertips, and whether the set threshold time is maintained stably during the sit-and-reach test based on the images collected in real time by the wireless image acquisition module.

[0074] The algorithm for judging whether the subject's arms are together and stretched out during the sitting forward flexion test, whether the upper body posture is bent forward, whether the cursor is pushed smoothly with the fingertips, and whether the set threshold time is maintained stably is as follows: a preset value A of the angle of the key points of the human body when the arms are together and stretched out, and a preset value B of the angle of the key points of the human body when the upper body posture is bent forward are set; based on the subject image taken in real time by the wireless image acquisition module, a measured value a of the angle of the key points of the human body when the arms are together and stretched out and a measured value b of the angle of the key points of the human body when the upper body posture is bent forward are calculated; if the measured value a of the angle of the key points of the human body when the arms are together and stretched out is less than or equal to the preset value A of the angle of the key points of the human body when the arms are together and stretched out, the arms are considered to be in the standard of being together and stretched out; if the measured value b of the angle of the key points of the human body when the upper body posture is bent forward is less than or equal to the preset value B of the angle of the key points of the human body when the upper body posture is bent forward, the upper body posture is considered to be in the standard of being bent forward. Subsequently, the wireless data processing module extracts the distance and movement information between the edge of the human finger and the cursor based on the subject image taken in real time by the wireless image acquisition module. If the distance is less than the contact preset value C and the cursor moves in a slow straight line, it is determined that the fingertip smoothly pushes the cursor. When the movement stops, the cursor static holding time t is calculated based on the subject image taken in real time by the wireless image acquisition module. If the static holding time is greater than the set threshold time T, it is determined that the stable hold is completed.

[0075] Part 2: The pressure sequence data collected by the first distributed flexible pressure wireless collection module and the light intensity sequence data of the light intensity wireless collection module are transmitted to the wireless data processing module. The wireless data processing module determines according to step 4 whether the pressure sequence data is continuously greater than the set seat pressure threshold and whether the light intensity sequence data is continuously less than the light intensity threshold condition, thereby determining whether the legs are straight and close to the seat cushion.

[0076] Part 3: The second distributed flexible pressure wireless acquisition module transmits the pressure sequence data to the wireless data processing module. The wireless data processing module determines whether the pressure sequence data is continuously greater than the set pedal pressure threshold condition according to step five, thereby determining whether the heels are close together and whether the entire sole of the foot is on the pedal of the sit-and-reach tester.

[0077] If the above three parts meet the conditions, the wireless data processing module controls the wireless sound and light module to prompt the subject and test the action specifications.

[0078] If any of the above three parts does not meet the conditions, the wireless data processing module controls the wireless sound and light module to remind the subject that the test action is not standardized and the test result is invalid. Please re-test according to the specifications and repeat steps 2 to 7.

[0079] Step 8: Prompt the subject that the test result is valid and the test is ended. The wireless data processing module controls the wireless sound and light module to prompt the subject that the test result is valid and the test is ended.

[0080] The present invention does not require manual observation, can prevent subjects and related test personnel from cheating, and can quickly realize the automated judgment of the standardization degree of the sit-and-reach flexion movement; it can be used in conjunction with an old sit-and-reach flexion tester, and compared with purchasing a new sit-and-reach flexion tester, it has the advantages of low cost, simple structure, and high reliability, while effectively ensuring the standardization of the sit-and-reach flexion test process.

[0081] The above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. 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 method for standardizing sit-and-reach test, characterized in that: The following steps are involved: Step 1: Turn on the power switches of the wireless image acquisition module, the first distributed flexible pressure wireless acquisition module, the light intensity wireless acquisition module, the second distributed flexible pressure wireless acquisition module, the wireless data processing module and the wireless sound and light display module. Each module completes initialization and pairing. The wireless data processing module controls the wireless sound and light display module to display that the display device is ready and can start testing the sound and light signals. Step 2: The subject sits on the cushion of the sit-and-reach tester, with legs straight, heels together, toes naturally apart, and the soles of the feet on the pedals of the sit-and-reach tester, to prepare for the sit-and-reach test; Step 3: The wireless image acquisition module continuously captures multiple images and transmits them to the wireless data processing module. The wireless data processing module determines whether the current ambient light meets the conditions for stably identifying the human body joints. If not, the wireless data processing module sends a control instruction to the main control submodule in the wireless image acquisition module. The main control submodule in the wireless image acquisition module controls the fill light submodule to perform fill light until the condition is met. Step 4: The pressure sequence data collected by the first distributed flexible pressure wireless collection module and the light intensity sequence data of the light intensity wireless collection module are transmitted to the wireless data processing module. The wireless data processing module determines whether the legs are straightened and close to the cushion by judging whether the pressure sequence data is continuously greater than the set cushion pressure threshold and whether the light intensity sequence data is continuously less than the light intensity threshold. If the continuous condition is not met, the wireless data processing module controls the wireless sound and light display module to prompt the subject to straighten his legs and close to the cushion until the condition is met. Step 5, the second distributed flexible pressure wireless acquisition module transmits the pressure sequence data to the wireless data processing module, and the wireless data processing module determines whether the heels are close together and whether the whole sole of the foot is on the pedal of the sitting forward flexion tester by judging whether the pressure sequence data is continuously greater than the set pedal pressure threshold condition. If the continuous condition is not met, the wireless data processing module controls the wireless sound and light display module to prompt the subject to keep the heels together and the whole sole of the foot on the pedal of the sitting forward flexion tester until the condition is met; Step 6: The wireless data processing module controls the wireless sound and light display module to prompt the subject to prepare for the action specification and start the sit-and-reach test; Step 7: After hearing the command from the wireless sound and light display module, the subject should face down with his palms, put his arms together and stretch them out, bend his upper body forward, and use the tips of his middle fingers to push the cursor forward smoothly until it cannot move; During the sit-and-reach test, the wireless image acquisition module acquires images in real time, and the first distributed flexible pressure wireless acquisition module, the light intensity wireless acquisition module and the second distributed flexible pressure wireless acquisition module synchronously acquire sequence data in real time. The above images and data are wirelessly transmitted to the wireless data processing module, and the wireless data processing module analyzes the images and data to determine whether the subject's movements are standard. The wireless data processing module determines whether the subject's movements are standard, specifically judging the following three parts: Part 1: The wireless data processing module determines whether the subjects' arms are close together and stretched out, whether the upper body posture is bent forward, whether the cursor is pushed smoothly with the fingertips, and whether the set threshold time is maintained stably according to the images collected in real time by the wireless image acquisition module during the sit-and-reach test; Part 2: The pressure sequence data collected by the first distributed flexible pressure wireless collection module and the light intensity sequence data of the light intensity wireless collection module are transmitted to the wireless data processing module. The wireless data processing module determines whether the pressure sequence data is continuously greater than the set cushion pressure threshold and whether the light intensity sequence data is continuously less than the light intensity threshold according to step 4, thereby determining whether the legs are straight and close to the cushion; Part 3: The second distributed flexible pressure wireless acquisition module transmits the pressure sequence data to the wireless data processing module, and the wireless data processing module determines whether the pressure sequence data is continuously greater than the set pedal pressure threshold condition according to step 5, thereby determining whether the heels are close together and whether the entire sole of the foot is on the pedal of the sit-and-reach tester; If the above three parts meet the conditions, the wireless data processing module controls the wireless sound and light display module to prompt the subject to test the action specifications; If any of the above three parts does not meet the conditions, the wireless data processing module controls the wireless sound and light display module to remind the subject that the test action is not standardized and the test result is invalid. Please re-test according to the specification and repeat steps 2 to 7; Step 8: The wireless data processing module controls the wireless sound and light display module to prompt the subject that the test result is valid and the test is ended.

2. The method according to claim 1, characterized in that: The algorithm for judging whether the current ambient lighting meets the requirements for stable identification of human joints described in step 3 is as follows: based on the N images collected by wireless imaging, the key points of the human legs, hands, arms and upper body in each image are identified using the human key point identification algorithm, and the number of key points in each image is compared to see whether it is equal to a preset value; if the number of key points in any of the N images is lower than the preset value, it is considered that the ambient lighting does not meet the requirements for stable identification of human joints; The algorithm for judging whether the pressure sequence data is continuously greater than the set cushion pressure threshold and the light intensity sequence data is continuously less than the light intensity threshold in step 4, thereby judging whether the legs are straightened and close to the cushion, is as follows: extract the subscripts in the pressure sequence data that are greater than the set cushion pressure threshold and the subscripts in the light intensity sequence data that are less than the light intensity threshold, and judge whether the extracted subscripts are continuous; if there are discontinuous subscripts, it is considered that the legs are not straightened and not close to the cushion; The algorithm for judging whether the pressure sequence data is continuously greater than the threshold condition of the set pedal pressure in step 5, thereby judging whether the heels are close together and whether the entire sole of the foot is pressed on the pedal of the sitting forward flexion tester, is as follows: extracting the subscripts greater than the set pedal pressure threshold in the pressure sequence data, and judging whether the extracted subscripts are continuous; if there are discontinuous subscripts, it is considered that the heels are not close together and the entire sole of the foot is not completely pressed on the pedal of the sitting forward flexion tester; The algorithm for judging whether the subject's arms are together and stretched out, whether the upper body posture is bent forward, whether the cursor is pushed smoothly with the fingertips, and whether the set threshold time is maintained stably in the process of the sit-and-reach test described in step seven is as follows: set a preset value for the angle of the key points of the human body when the arms are together and stretched out, and a preset value for the angle of the key points of the human body when the upper body posture is bent forward, and calculate the measured value of the angle of the key points of the human body when the arms are together and stretched out and the measured value of the angle of the key points of the human body when the upper body posture is bent forward according to the subject image taken in real time by the wireless image acquisition module; if the measured value of the angle of the key points of the human body when the arms are together and stretched out is less than or equal to the preset value of the angle of the key points of the human body when the arms are together and stretched out, it is determined that The arms are put together and stretched out in accordance with the standard. If the measured value of the angle of the key points of the human body in the upper body posture forward flexion is less than or equal to the preset value of the angle of the key points of the human body in the upper body posture forward flexion, the upper body posture forward flexion standard is determined. Subsequently, the wireless data processing module extracts the distance and movement information between the edge of the human finger and the cursor based on the subject image taken in real time by the wireless image acquisition module. If the distance is less than the contact preset value and the cursor moves in a slow straight line, it is determined that the fingertip smoothly pushes the cursor. When the movement stops, the cursor static holding time is calculated based on the subject image taken in real time by the wireless image acquisition module. If the static holding time is greater than the set threshold time, it is determined that the stable hold is completed.

3. A device for implementing the standardized sit-and-reach test of the method as claimed in claim 1 or 2, comprising a sit-and-reach tester, characterized in that: Also includes: A wireless image acquisition module, a first distributed flexible pressure wireless acquisition module, a light intensity wireless acquisition module, a second distributed flexible pressure wireless acquisition module, a wireless data processing module and a wireless sound and light display module; The first distributed flexible pressure wireless acquisition module and the light intensity wireless acquisition module are installed on the seat cushion of the sit forward flexion tester; the second distributed flexible pressure wireless acquisition module is installed on the foot pedal of the sit forward flexion tester; the wireless image acquisition module is placed on the side of the sit forward flexion tester, perpendicular to the side of the subject, and its image acquisition area is adjusted to align with the subject; the wireless data processing module and the wireless sound and light display module are placed on the side of the sit forward flexion tester; When the subject is performing the sit-and-reach test, the wireless image acquisition module acquires images of the subject's limb movements, the first distributed flexible pressure wireless acquisition module and the light intensity wireless acquisition module respectively acquire pressure and light intensity sequence data on the seat cushion of the sit-and-reach tester, and the second distributed flexible pressure wireless acquisition module acquires pressure sequence data on the foot pedal of the sit-and-reach tester; the above images and data are wirelessly transmitted to the wireless data processing module to determine whether the subject's current movements are standard, and the wireless data processing module controls the wireless sound and light display module to prompt the subject to standardize the movements, thereby achieving standardization of the subject's sit-and-reach movements.

4. A device for standardized sit-and-reach test as claimed in claim 3, characterized in that: The wireless image acquisition module comprises an image acquisition submodule, a main control submodule, and a wireless transceiver submodule, wherein the control and data interfaces of the image acquisition submodule and the wireless transceiver submodule are all connected to the main control submodule; the main control submodule controls the image acquisition submodule to acquire the limb movement images of the subject, and sends the captured images to the wireless data processing module through the wireless transceiver submodule to determine whether the test specification of the sitting forward flexion is met, with the legs straightened, the palms facing downward, the arms together and stretched out, the upper body bent forward, and the cursor pushed forward smoothly by the middle fingertips of both hands.

5. A device for standardized sit-and-reach test as claimed in claim 3, characterized in that: The wireless image acquisition module also includes a fill light submodule, whose control interface is connected to the main control submodule; the wireless data processing module determines whether the current ambient lighting meets the conditions for stably identifying human joints based on the image information collected by the wireless image acquisition module. If not, the wireless data processing module sends an instruction to the main control submodule in the wireless image acquisition module, and the main control submodule controls the fill light submodule in the wireless image acquisition module to fill light.

6. A device for standardized sit-and-reach test as claimed in claim 3, characterized in that: The first distributed flexible pressure wireless acquisition module includes a plurality of thin film flexible pressure sensors, a main control submodule, and a wireless transceiver submodule. The data and control interfaces of the plurality of thin film flexible pressure sensors and the wireless transceiver submodule are connected to the main control submodule; the main control submodule controls the plurality of thin film flexible pressure sensors to collect pressure sequence data on the seat cushion of the sitting forward flexion tester, and sends the data to the wireless data processing module through the wireless transceiver submodule to determine whether the subject's legs are straight and close to the seat cushion.

7. A device for standardized sit-and-reach test as claimed in claim 3, characterized in that: The light intensity wireless acquisition module includes a plurality of light intensity acquisition sensors, a main control submodule, and a wireless transceiver submodule. The data and control interfaces of the plurality of light intensity acquisition sensors and the wireless transceiver submodule are connected to the main control submodule. The main control submodule controls the plurality of light intensity acquisition sensors to acquire light intensity sequence data on the seat cushion of the sitting forward flexion tester, and sends the data to the wireless data processing module through the wireless transceiver submodule to determine whether the test subject's legs are straightened and close to the seat cushion.

8. A device for standardized sit-and-reach test as claimed in claim 3, characterized in that: The second distributed flexible pressure wireless acquisition module includes a plurality of thin film flexible pressure sensors, a main control submodule, and a wireless transceiver submodule. The data and control interfaces of the plurality of thin film flexible pressure sensors and the wireless transceiver submodule are connected to the main control submodule; the main control submodule controls the plurality of thin film flexible pressure sensors to collect the pressure sequence data on the pedal of the sit forward flexion tester, and sends the data to the wireless data processing module through the wireless transceiver submodule to determine whether the subject's heels are close together and whether the entire sole of the foot is on the pedal of the sit forward flexion tester.

9. A device for standardized sit-and-reach test as claimed in claim 3, characterized in that: The wireless data processing module includes an embedded signal processing and controller and a wireless transceiver submodule, wherein the data and control interface of the wireless transceiver submodule is connected to the embedded signal processing and controller; the embedded signal processing and controller determines whether the subject's sitting forward flexion movement is standard according to the image data of the wireless image acquisition module, the pressure sequence data of the first distributed flexible pressure wireless acquisition module, the light intensity sequence data of the light intensity wireless acquisition module, and the pressure sequence data of the second distributed flexible pressure wireless acquisition module, and wirelessly transmits the result to the wireless sound and light display module for sound and light prompting; the embedded signal processing and controller realizes communication and control with the wireless image acquisition module, the first distributed flexible pressure wireless acquisition module, the light intensity wireless acquisition module, the second distributed flexible pressure wireless acquisition module, and the wireless sound and light display module through the wireless transceiver submodule.

10. The device for standardized sit-and-reach test according to claim 3, characterized in that: The wireless sound and light display module comprises a display screen and an audio system, a main control submodule and a wireless transceiver submodule. The display screen and the audio system are connected to the audio and video output interface of the main control submodule, and the data and control interface of the wireless transceiver submodule is connected to the main control submodule. The main control submodule controls the display screen and the audio system to prompt the subject whether the action is standard in the form of optical display and sound according to the control instruction sent by the wireless data processing module received by the wireless transceiver submodule.

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