Force sensing testing device of flexible wearable intelligent textile

Abstract

The invention discloses a force sensing test device for a flexible wearable intelligent textile. The force sensing test device comprises a flexible force sensor, a mechanical signal acquisition module and an electrical signal acquisition module. The device can be used for detecting various characteristic parameters of the flexible force sensor, such as mechanical property, sensitivity, hysteresis, linearity, repeatability, response characteristic and the like. Three-dimensional force detection of the flexible force sensor in different directions and at different angles is realized, various performances of the flexible force sensor are better explored, and the flexible force sensor is applied to various aspects such as health medical treatment and intelligent life.

Description

Technical Field

[0001] The present invention relates to a force sensing test device for a flexible wearable intelligent textile, and in particular to a force sensing test device, belonging to the technical field of detection equipment. Background Art

[0002] In recent decades, electronic and artificial intelligence technologies have been greatly developed, and the emergence of intelligent sensing devices has realized the dynamic capture and digital display of physical, chemical and biological signals. As an important form of wearable technology, flexible wearable smart textiles have the characteristics of light weight, flexibility, good stability, large working range and high sensitivity. They can achieve human health monitoring while meeting the requirements of wearing comfort.

[0003] With the widespread application of flexible wearable smart textiles, the requirements for their force sensing performance are becoming higher and higher. The force sensing test device can simulate various mechanical stimuli generated by human body movement and monitor the response of textiles in real time to evaluate their force sensing performance and accuracy. The flexibility and stretchability of textiles place high demands on the design of the test device, and it is necessary to ensure that the textiles themselves will not be damaged during the test. At the same time, the test device also needs to have the characteristics of high precision, high stability and high sensitivity to accurately reflect the force sensing performance of textiles.

[0004] At present, the force sensing test devices for flexible wearable textiles have limitations in force direction detection. Most devices can only sense and detect positive pressure, and it is difficult to sense forces in other directions, or the shear force detection in other directions is not accurate and sensitive enough. Moreover, due to the softness of wearable textiles, some devices may damage the textiles themselves during the test process. These shortcomings obviously cannot meet the application in the field of wearable detection. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a force sensing test device with high precision, high stability and high sensitivity, and apply it to three-dimensional force sensing detection to realize the detection of characteristic parameters of various flexible force sensors, such as mechanical properties, sensitivity, hysteresis, linearity, repeatability, response characteristics, etc., to realize three-dimensional force detection of flexible force sensors in different directions and angles, so as to better explore its various performances and applications in health care, smart life and other aspects.

[0006] In order to solve the above problems, the present invention provides a force perception testing device for flexible wearable intelligent textiles, which includes a flexible force sensor, a mechanical signal acquisition module, and an electrical signal acquisition module.

[0007] Preferably, the flexible force sensor is arranged on an angle-adjustable platform.

[0008] Preferably, the flexible force sensor includes a flexible pressure sensor and a flexible tension sensor.

[0009] Preferably, the adjustable angle platform is in a cone shape as a whole, and the bottom tip is connected to the bottom platform through a small universal joint, so that it can be fixed and freely rotated 180°.

[0010] Preferably, the mechanical signal acquisition module adopts a universal testing machine.

[0011] Preferably, the electrical signal acquisition module adopts a digital source meter or an electrochemical workstation.

[0012] Preferably, the flexible force sensor, the mechanical signal acquisition module, and the electrical signal acquisition module are connected to a PC for signal processing.

[0013] The PC is equipped with current signal processing software and supporting software for the universal testing machine. The current signal processing software often uses Labview programming software.

[0014] The above device can be used to detect the parameters of various flexible force sensor characteristics in order to better explore their various performances and applications in health care, smart life, etc. The parameters include mechanical properties, sensitivity, hysteresis, linearity, repeatability, response characteristics, etc.

[0015] The present invention provides a force sensing test device for flexible wearable textiles, which can be used to detect various parameters of flexible force sensor characteristics, such as mechanical properties, sensitivity, hysteresis, linearity, repeatability, response characteristics, etc. It can realize three-dimensional force detection of flexible force sensors in different directions and angles, and better explore their various performances and applications in health care, smart life, etc.

[0016] The test process of the force sensing test device for flexible wearable textiles in the present invention is to fix the sensor to be tested on an adjustable angle platform, place the platform under the pressure head of the universal testing machine, and adjust the workbench to the corresponding angle according to the test needs. After the adjustment is completed, the sensor electrodes are connected to the positive and negative poles of the digital power meter, and the digital power meter is connected to the computer to record and collect the electrical signal data generated by the sensor. The universal testing machine can also set parameters through computer software to record the applied mechanical signal data.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] (1) Force sensing test device for flexible wearable smart textiles The sensor placement platform adopts an adjustable angle platform. By adjusting the different angles of the platform, the angle of the sensor on the platform changes accordingly, achieving the purpose of applying shear forces in various directions to the sensor to be tested.

[0019] (2) The force sensing test device for flexible wearable smart textiles applies various mechanical behaviors such as stretching and compression to the sensor through a universal testing machine, which can more accurately simulate and measure various mechanical stimuli generated by human body movements, thereby more accurately evaluating the force sensing performance of flexible wearable smart textiles.

[0020] (3) The present invention has built a force sensing test device for flexible wearable smart textiles, which is composed of an adjustable angle platform, a flexible force sensor, a mechanical signal acquisition module, an electrical signal acquisition module and a host computer. The mechanical signal acquisition module uses a universal testing machine, the electrical signal acquisition module uses a digital source meter, and the host computer includes current signal processing software and universal testing machine software. The sensor tilt angle is controlled by the adjustable angle platform to achieve the purpose of applying oblique forces in different directions to the sensor. The device of the invention can be used to detect parameters of various flexible force sensor characteristics, such as mechanical properties, sensitivity, hysteresis, linearity, repeatability, response characteristics, etc. Three-dimensional force detection of flexible force sensors in different directions and angles is achieved to better explore its various performances and applications in health care, smart life, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the force sensing test device for flexible wearable smart textiles;

[0022] Figure 2 This is a sensitivity test diagram of the force sensing test device for flexible wearable smart textiles;

[0023] Figure 3 This is a repeatability test diagram of the force sensing test device for flexible wearable smart textiles. DETAILED DESCRIPTION

[0024] In order to make the present invention more clearly understood, preferred embodiments are described in detail below with reference to the accompanying drawings.

[0025] Example 1

[0026] This embodiment provides a force sensing test device for a flexible wearable smart textile. Figure 1 As shown, it includes a flexible force sensor 2, a mechanical signal acquisition module 1, and an electrical signal acquisition module 4. The flexible force sensor is arranged on an adjustable angle platform 3. The adjustable angle platform 3 is conical in shape as a whole, and the bottom tip is connected to the bottom platform through a small universal joint, which can be fixed and freely rotated 180°. The inclination angle of the flexible force sensor 2 is controlled by the adjustable angle platform 3 to achieve the purpose of applying oblique forces in different directions to the flexible force sensor 2. Universal testing machine (Shimadzu AGS-x, Japan), digital source meter (Keithley DAQ6510), small universal joint (Heng Qianyu).

[0027] The flexible force sensor 2 includes a flexible pressure sensor and a flexible tension sensor.

[0028] The mechanical signal acquisition module 1 adopts a universal testing machine.

[0029] The electrical signal acquisition module 4 is a digital source meter or an electrochemical workstation.

[0030] The flexible force sensor 2, the mechanical signal acquisition module 1, and the electrical signal acquisition module 4 are connected to a PC terminal 5 for signal processing. The PC terminal 5 is equipped with current signal processing software and supporting software for a universal testing machine, and the current signal processing software is often Labview programming software.

[0031] Example 2

[0032] A flexible sensor is placed on an adjustable angle platform, a universal testing machine is used to apply pressure to the sensor, and a digital source meter is used to collect and record the changes in electrical signals. Figure 2 As shown in the figure, the sensitivity of the measured flexible sensor is the slope of the curve. In the range of 0 to 0.3N, the sensitivity is 0.276N. -1 ; In the range of 0.3~0.8N, the sensitivity is 1.034N -1 ; In the range of 0.8~1.5N, the sensitivity is 0.746N -1 ; In the range of 1.5~4.8N, the sensitivity is 0.278N -1 .

[0033] The flexible sensor under test was subjected to cyclic pressure for 5 times using a universal testing machine, and the current signal changes were collected and recorded using a digital source meter. Figure 3 As shown, it can be seen that no matter it is a small pressure or a large pressure, the current output signal of the measured sensor is relatively stable, indicating that the flexible sensor has repeatability and stability.

Claims

1. A force sensing test device for flexible wearable smart textiles, characterized in that: It includes a flexible force sensor, a mechanical signal acquisition module, and an electrical signal acquisition module.

2. The force sensing test device for flexible wearable smart textiles according to claim 1, characterized in that: The flexible force sensor is arranged on an angle-adjustable platform.

3. The force sensing test device for flexible wearable smart textiles according to claim 1, characterized in that: The flexible force sensor includes a flexible pressure sensor and a flexible tension sensor.

4. The force sensing test device for flexible wearable smart textiles according to claim 1, characterized in that: The adjustable angle platform is in a cone shape as a whole, and the tip of the bottom is connected to the bottom platform through a small universal joint, so that it can be freely rotated 180 degrees while being fixed.

5. The force sensing test device for flexible wearable smart textiles according to claim 1, characterized in that: The mechanical signal acquisition module adopts a universal testing machine.

6. The force sensing test device for flexible wearable smart textiles according to claim 1, characterized in that: The electrical signal acquisition module adopts a digital source meter or an electrochemical workstation.

7. The force sensing test device for flexible wearable smart textiles according to claim 1, characterized in that: The flexible force sensor, the mechanical signal acquisition module and the electrical signal acquisition module are connected to a PC terminal for signal processing.

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