CN214667382U

CN214667382U - Hitting power measuring device

Info

Publication number: CN214667382U
Application number: CN202121270565.3U
Authority: CN
Inventors: 张云发; 王子乔; 孙正鼐
Original assignee: Beijing Dingyun International Intelligent Equipment Technology Co ltd
Current assignee: Beijing Dingyun International Intelligent Equipment Technology Co ltd
Priority date: 2021-06-08
Filing date: 2021-06-08
Publication date: 2021-11-09
Anticipated expiration: 2031-06-08

Abstract

The utility model provides a hitting power measuring device, which comprises a base body, wherein a measuring system is arranged in the base body, and the hitting power measuring device comprises a time base, a power supply module, a multi-axis acceleration sensing module and a data processing module, wherein the multi-axis acceleration sensing module is used for acquiring triaxial acceleration data, a roll angle, a pitch angle and yaw angle data of a batter when the batter hits, and transmitting the data to the data processing module; the data processing module is used for pre-storing the mass components of the calibrated limbs in the three coordinate axis directions and receiving the data transmitted by the multi-axis acceleration sensing module to calculate the size and the direction of the hitting force; the mass component is calibrated by matching the base body with a mass calibration module, and is used for providing hitting force data when a striker wears the base body to hit a preset position of the striker. The impact force measuring device is low in manufacturing cost and small in damage to the sensor; the striking force measuring device can judge the magnitude and the direction of the striking force on the premise of not limiting the striking position.

Description

Hitting power measuring device

Technical Field

The utility model relates to a measure technical field, especially relate to a hitting power measuring device.

Background

In many cases, it is necessary to detect the magnitude of the striking force of the limb to evaluate the physical performance of the individual or to judge the striking effect. For example, in some sports, the device for measuring the hitting power of a player is mainly installed in the protector of the opponent player, and can only measure the strength, and the hitting effect needs to be judged by a judge. The existing hitting force measuring device for other purposes generally needs to be bound on a hit object, the hitting force is detected through a hitting sensor, a certain damage is caused to the sensor by long-term hitting, and usually, hitting at a specific position needs to be limited during measurement, so that the exertion of a batter is influenced.

Some of the existing methods for detecting the magnitude of the hitting force adopt miniature weighing force transducers. For example, the free combat force target system disclosed in chinese patent application No. 201410189591.1 employs a miniature load cell for signal detection, the load cell being placed on the object to be struck and a buffer spring to reduce the impact force. However, the sensor may be damaged after a long-term striking, and the force measuring target needs to be mounted on the object to be struck during measurement, so that striking at a specific position is limited, the striking area is limited by the position of the sensor, which is not convenient, and the striking manner of the striker also needs to be determined manually.

A taekwondo electronic protective equipment suit disclosed in the Chinese patent with patent number 201820314546.8 adopts a plurality of flexible pressure sensor to carry out the detection of hitting power, assembles a plurality of flexible pressure sensor in the protective equipment of the person of being hit like this, has led to the protective equipment increase in size, and uses sensor quantity more, need to be covered with all positions of waiting to detect, and the scale is great, and is with high costs, and long-term hitting can lead to certain damage to the sensor, and the region of not arranging the sensor can't detect.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems in the prior art, the application provides a hitting force measuring device, so that the hitting force measuring device is mounted on a striker, and the device is low in manufacturing cost, small in size, easy to carry and small in damage to a sensor; the striking force measuring device can judge the magnitude and the direction of the striking force on the premise of not limiting the striking position.

In order to achieve the above object, the present application provides a hitting force measuring device, including a base body, configured to be placed on a person, a measuring system disposed in the base body, the measuring system including a time base and power supply module, a multi-axis acceleration sensing module, and a data processing module, the time base and power supply module being configured to provide a clock signal and electric energy for the measuring system; the multi-axis acceleration sensing module is used for acquiring the acceleration data of x, y and z axes and the data of a roll angle, a pitch angle and a yaw angle when a striker strikes and transmitting the data to the data processing module; the data processing module is used for pre-storing the mass components of the calibrated limbs in the directions of three coordinate axes of x, y and z, receiving the data of the acceleration of the three axes of x, y and z and the data of the roll angle, the pitch angle and the yaw angle transmitted by the multi-axis acceleration sensing module and calculating the magnitude and the direction of the hitting power; the mass components of the limbs in the directions of the x coordinate axis, the y coordinate axis and the z coordinate axis are calibrated by matching the base body with the mass calibration module, and the mass calibration module is used for providing three-dimensional hitting force data when a striker wears the preset position of the base body hitting mass calibration module during early calibration.

In some embodiments, the hitting force measuring device further comprises a display and recording module, the display and recording module is connected with the data processing module, and the display and recording module is used for displaying information so as to facilitate observation.

In some embodiments, the hitting force measuring apparatus further includes a wireless communication and transmission module, and the wireless communication and transmission module is used for connecting the data processing module and the display and recording module.

The scheme of the application has the advantages that the hitting force measuring device is installed on the body of a hit person, and the device is low in manufacturing cost, small in size, easy to carry and small in damage to the sensor; the striking force measuring device can judge the magnitude and the direction of the striking force on the premise of not limiting the striking position.

Drawings

Fig. 1 shows a schematic view of the measurement principle of the striking force measurement device in the embodiment.

Fig. 2 is a schematic diagram showing the arrangement direction of three-dimensional coordinate axes of the multi-axis acceleration sensing module in the embodiment.

Fig. 3 is a schematic diagram illustrating that the three-dimensional coordinate system established by the multi-axis acceleration sensing module divides the space into eight quadrants according to the embodiment.

Fig. 4 shows a schematic diagram of a rolling angle, a pitching angle and a yaw angle formed when the coordinate system is rotated by the movement of the multi-axis acceleration sensing module in the embodiment.

Fig. 5 shows a schematic diagram of the exact direction of the resultant acceleration in an embodiment.

Reference numerals: the system comprises a 1-multi-axis acceleration sensing module, a 2-data processing module, a 3-wireless communication and transmission module, a 4-display and recording module and a 5-time base and power supply module.

Detailed Description

The following further describes embodiments of the present application with reference to the drawings.

When the human body is hit with the same acceleration, the forces acting in different degrees of freedom are different, and the human body can be regarded as that the mass distribution of the body in different degrees of freedom has a certain difference. A hitting force measuring apparatus and method are designed based on the present application.

As shown in fig. 1, the striking force measuring device according to the present application includes a base body for being placed on a striker, for example, the base body may be a hand ring or other portable object, and a specific striker may hold the base body in a hand or wear the base body on a wrist; a measuring system is arranged in the substrate, the measuring system comprises a time base and power supply module 5, a multi-axis acceleration sensing module 1 and a data processing module 2, in this embodiment, the multi-axis acceleration sensing module 1 can adopt a multi-axis acceleration sensor mpu6050, mpu9250 or HI226 and the like, the data processing module 2 can adopt an STM32ZET6 single chip microcomputer or an ARM7 and the like, the time base and power supply module 5 is used for providing clock signals and electric energy for the measuring system, and can provide time reference or record striking time for the working of multiple systems; as shown in fig. 2, the multi-axis acceleration sensing module 1 is configured to collect data of x, y, z three-axis acceleration data and roll angle (roll), pitch angle (pitch), yaw angle (yaw) of a batter when the batter strikes, and transmit the data to the data processing module 2, wherein when the batter wears a substrate to perform a striking action, the multi-axis acceleration sensing module 1 moves along with the movement of the batter so that the coordinate system rotates, at this time, the rotation mode of the x axis is represented by the roll angle (roll), the rotation mode of the y axis is represented by the pitch angle (pitch), and the rotation mode of the z axis is represented by the yaw angle (yaw) as shown in fig. 4. The data processing module 2 is used for storing the mass components of the calibrated limb in the directions of the three coordinate axes of x, y and z in advance, receiving the data of the acceleration of the three axes of x, y and z and the data of the roll angle (roll), the pitch angle (pitch) and the yaw angle (yaw) transmitted by the multi-axis acceleration sensing module 1, and calculating the magnitude and the direction of the hitting power. The hitting power measuring device further comprises a mass calibration module, mass components of limbs in the directions of three coordinate axes of x, y and z are calibrated by matching of the base body and the mass calibration module, the mass calibration module is used for providing three-dimensional hitting power data when a striker wears the preset position of the base body hitting quality calibration module during early calibration, in the embodiment, the mass calibration module can adopt KWR46 six-axis force sensors and the like, when the hitting power measuring device is used, the striker is limited to hitting a specific position, and a hitting area is limited by the position of the sensor.

The hitting power measuring device can further comprise a display and recording module 4, the display and recording module 4 is connected with the data processing module 2, and the display and recording module 4 is used for displaying information (which can include relevant information of the multi-axis acceleration sensing module 1 and relevant information of hitting power obtained by processing of the data processing module 2), so that observation is facilitated. In this embodiment, the display and recording module 4 may adopt an LCD1602A, an LCD12864, an LED, computer upper computer software, and the like.

When the non-local display is performed, the hitting force measuring device may further include a wireless communication and transmission module 3, and the wireless communication and transmission module 3 is used for connecting the data processing module 2 and the display and recording module 4. In this embodiment, the wireless communication and transmission module 3 may adopt a bluetooth module (for example, a bluetooth module with a model number of NRF52810, etc.), may also adopt a WIFI module (for example, a WIFI module with a model number of ESP8266, etc.), and may also adopt an I module²C or 485 bus technology for wired transmission.

The application relates to a hitting force measuring method which comprises the following steps:

step 1, calibrating mass components of limbs of a striker in the directions of three coordinate axes of x, y and z, wherein the calibration process is as follows:

the method comprises the following steps that a batter wears a base body to perform n times of batter on a preset position of a mass calibration module, wherein n is more than or equal to 3 and is an integer, acceleration of a limb when the limb is batted is divided into three directions of x, y and z by the multi-axis acceleration sensing module 1 during each batter, values of the acceleration in three coordinate axis directions can be read out from the multi-axis acceleration sensing module 1, batter force data can be read out from the mass calibration module, and mass components of the limb in the three coordinate axis directions can be calibrated according to the following formula: m is_x，m_y，m_z；

And 2, inputting the mass components of the calibrated limb in the directions of the three coordinate axes of x, y and z into the data processing module 2 for storage.

And 3, a striker wears the base body to strike at any position, acquires the x, y and z triaxial acceleration data, the roll angle, the pitch angle and the yaw angle of the striker during striking through the multiaxial acceleration sensing module 1, and transmits the data to the data processing module 2.

Step 4, through the calculation of the data processing module 2,and obtaining the magnitude and the direction of the hitting force, wherein the process is as follows: according to the formula

Calculating to obtain the magnitude of the hitting force; the direction of the striking force is judged according to the data of the x, y and z triaxial acceleration data, the roll angle, the pitch angle and the yaw angle transmitted by the multi-axis acceleration sensing module 1, and the process is as follows:

step 41, establishing a three-dimensional coordinate system through the multi-axis acceleration sensing module to divide the space into eight quadrants, as shown in fig. 3, when a_x＞0 a_y＞0 a_zWhen the acceleration is more than 0, the direction of the resultant acceleration is in quadrant I;

when a is_x＜0 a_y＞0 a_zWhen the acceleration is more than 0, the direction of the resultant acceleration is in a quadrant II;

when a is_x＜0 a_y＜0 a_zWhen the acceleration is more than 0, the direction of the resultant acceleration is in a quadrant III;

when a is_x＞0 a_y＜0 a_zWhen the acceleration is more than 0, the direction of the resultant acceleration is in the IV quadrant;

when a is_x＞0 a_y＞0 a_zWhen the acceleration is less than 0, the direction of the combined acceleration is in a V quadrant;

when a is_x＜0 a_y＞0 a_zWhen the sum of the acceleration is less than 0, the direction of the resultant acceleration is in a VI quadrant;

when a is_x＜0 a_y＜0 a_zWhen the acceleration is less than 0, the direction of the resultant acceleration is in a VII quadrant;

when a is_x＞0 a_y＜0 a_zWhen the sum of the acceleration is less than 0, the direction of the resultant acceleration is in the VIII quadrant.

And 42, determining the orientation of the coordinate system after rotation in the step 41 according to the roll angle, the pitch angle and the yaw angle transmitted by the multi-axis acceleration sensing module 1.

And 43, judging the quadrant of the combined acceleration through the positive and negative of the acceleration data of the x, y and z axes transmitted by the multi-axis acceleration sensing module 1.

And step 44, synthesizing the acceleration of each axis to obtain the accurate direction of the resultant acceleration, as shown in fig. 5.

The hitting force measuring method related to the present application may further include step 5 of displaying data to be displayed.

The hitting force measuring device is installed on a striker body, and is low in manufacturing cost, small in size, easy to carry and small in damage to a sensor; the striking force measuring device can judge the magnitude and the direction of the striking force on the premise of not limiting the striking position.

The above description is only for the preferred embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can substitute or change the technical solution of the present application and its concept within the technical scope of the present application, and shall be covered by the scope of the present application.

Claims

1. A hitting force measuring apparatus characterized in that: the measuring system comprises a time base and power supply module, a multi-axis acceleration sensing module and a data processing module, wherein the time base and power supply module is used for providing clock signals and electric energy for the measuring system; the multi-axis acceleration sensing module is used for acquiring the acceleration data of x, y and z axes and the data of a roll angle, a pitch angle and a yaw angle when a striker strikes and transmitting the data to the data processing module; the data processing module is used for pre-storing the mass components of the calibrated limbs in the directions of three coordinate axes of x, y and z, receiving the data of the acceleration of the three axes of x, y and z and the data of the roll angle, the pitch angle and the yaw angle transmitted by the multi-axis acceleration sensing module and calculating the magnitude and the direction of the hitting power; the mass components of the limbs in the directions of the x coordinate axis, the y coordinate axis and the z coordinate axis are calibrated by matching the base body with the mass calibration module, and the mass calibration module is used for providing three-dimensional hitting force data when a striker wears the preset position of the base body hitting mass calibration module during early calibration.

2. A struck force measuring apparatus according to claim 1, wherein: the hitting power measuring device further comprises a display and recording module, the display and recording module is connected with the data processing module, and the display and recording module is used for displaying information and facilitating observation.

3. A struck force measuring apparatus according to claim 2, wherein: the hitting power measuring device further comprises a wireless communication and transmission module, and the wireless communication and transmission module is used for connecting the data processing module and the display and recording module.