Coding electrode, signal acquisition method and system for array structure information acquisition

Abstract

The present invention discloses an encoding electrode, signal acquisition method, and system for array structure information acquisition. The encoding electrode includes a substrate, and a bottom electrode group, a pressure-sensitive array layer, a top electrode group, and an elastic layer stacked sequentially on the substrate. The bottom electrode group and the top electrode group each include a plurality of conductive membrane sub-electrodes. The pressure-sensitive array layer includes a plurality of pressure-sensitive membranes, and pressure-sensitive membranes are provided at the intersections of the conductive membrane sub-electrodes of the bottom electrode group and the conductive membrane sub-electrodes of the top electrode group. The signal acquisition method includes presetting an external force threshold, pre-processing to obtain voltage thresholds of the top electrode group and the bottom electrode group corresponding to the external force threshold, calibrating the external force position, grading the external force magnitude, and displaying the external force position and magnitude on a display screen. Compared with the prior art, the present invention only requires the same number of wires as the conductive membrane sub-electrodes to complete voltage data acquisition, effectively reducing the number of wires and acquisition channels.

Description

Technical Field

[0001] The present invention relates to a coding electrode, a signal acquisition method and a system for array structure information acquisition, and belongs to the technical field of friction power generation and sports. Background Art

[0002] Being able to accurately, conveniently, and at a low cost monitor the location and intensity of force within a given space has always been a desired goal for practitioners and users in related fields. For athletes, monitoring the location and intensity of force during training helps coaches identify technical problems in movements, propose solutions, and promote improvements in training methods. For a long time, monitoring the location and intensity of force has been achieved by setting up a large number of sensor groups, each of which is connected to the signal acquisition circuit by a wire. This inevitably increases the number of leads and acquisition channels. For example, if the number of sensors in the sensor group is calculated to be m×n, then the number of leads and acquisition channels must be at least m×n. When the values ​​of m and n are large, the manufacturing costs generated by the number of leads and acquisition channels may even become unacceptable. For example, the patent number CN201910321336 filed in 2019 is titled "An Electronic Table Tennis Racket". This patent sets multiple pressure sensor groups on the table tennis racket. The microcontroller converts the position of the compressed pressure sensor into a voice signal and plays the hitting position information through a speaker, so that athletes can discover technical problems and make technical improvements. However, each sensor signal output end of the pressure sensor group of this technology must be connected to the signal input end of the microcontroller. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the defects of the existing technology and provide a coding electrode, signal acquisition method and system for array structure information acquisition. A top electrode group and a bottom electrode group are designed, and multiple conductive film sub-electrodes are set in each electrode group. Positioning and signal acquisition are performed by crossing two conductive film sub-electrodes in different electrode groups. For an m×n array design, only m+n channels and wires are required to complete positioning and signal acquisition, greatly reducing the number of channels for collecting signals.

[0004] To achieve the above objectives, in a first aspect, the present invention provides a coding electrode for array structure information acquisition, comprising:

[0005] A substrate, and a bottom electrode group, a pressure sensitive array layer, a top electrode group, and an elastic layer stacked on the substrate in sequence;

[0006] The bottom electrode group and the top electrode group each include a plurality of conductive film sub-electrodes;

[0007] The pressure sensitive array layer includes a plurality of pressure sensitive membranes, and pressure sensitive membranes are provided at the intersections of the conductive membrane sub-electrodes of the bottom electrode group and the conductive membrane sub-electrodes of the top electrode group;

[0008] A pressure-sensitive membrane, the conductive membrane sub-electrode corresponding to its projection, the elastic layer and the substrate constitute an array basic unit, and multiple array basic units constitute a signal acquisition array.

[0009] Furthermore, the conductive film sub-electrodes in the bottom electrode group are arranged in parallel, and the conductive film sub-electrodes in the top electrode group are arranged in parallel;

[0010] The conductive film sub-electrodes in the bottom electrode group and the conductive film sub-electrodes in the top electrode group are vertically staggered.

[0011] Furthermore, the thickness of the elastic layer is 0-100 mm, and the material of the elastic layer includes insulating material.

[0012] Furthermore, the thickness of the conductive film sheet sub-electrode is 0-10 mm, and the material of the conductive film sheet sub-electrode includes conductive material.

[0013] Furthermore, the thickness of the pressure sensitive membrane is 0-100 mm, and the projection of the pressure sensitive membrane covers the intersection surface of the two conductive membrane sub-electrodes on which it is located.

[0014] In a second aspect, the present invention provides a signal acquisition method for encoding electrodes for array structure information acquisition based on any one of the first aspects, comprising the following steps:

[0015] Preset the external force threshold, and pre-process to obtain the voltage thresholds of the top electrode group and the bottom electrode group corresponding to the external force threshold;

[0016] After the external force is applied, the position of the external force is calibrated based on the voltage thresholds of the top electrode group and the bottom electrode group, and the magnitude of the external force is graded;

[0017] The external force position and magnitude are displayed on the screen.

[0018] Furthermore, the preprocessing to obtain the voltage thresholds of the top electrode group and the bottom electrode group corresponding to the external force threshold includes:

[0019] Preset a force measurement calibration module equivalent to an array basic unit;

[0020] A force of an external force threshold value is applied to the force measurement calibration module to obtain the voltage thresholds of the top electrode group and the bottom electrode group.

[0021] Furthermore, the calibrating of the external force position includes:

[0022] The voltages generated by the conductive film sub-electrodes of the top electrode group and the bottom electrode group when receiving external force are obtained. If both are greater than or equal to the threshold voltage of the corresponding electrode group, the corresponding two conductive film sub-electrodes are recorded to calibrate the external force position.

[0023] Furthermore, the grading of the magnitude of the external force includes:

[0024] The voltages generated by the conductive film sub-electrodes of the top electrode group and the bottom electrode group when receiving external force are obtained, and the voltages are rounded with the threshold voltages of the corresponding electrode groups to grade the magnitude of the external force.

[0025] In a third aspect, the present invention provides a signal acquisition system, which is used to perform the method described in any one of the second aspects, comprising the encoding electrode described in any one of the first aspects, and a signal acquisition circuit, a signal processing circuit, an analog-to-digital conversion circuit, and a computer in communication with each other;

[0026] Each of the conductive film sub-electrodes is connected to a signal acquisition circuit.

[0027] The beneficial effects achieved by the present invention are:

[0028] The present invention provides encoding electrodes, signal acquisition methods and systems for array structure information acquisition. A top electrode group, a pressure-sensitive array layer and a bottom electrode group structure are provided. Conductive film sheet sub-electrodes are provided in the top electrode group and the bottom electrode group. Positioning and signal acquisition are performed by crossing two conductive film sheet sub-electrodes in different electrode groups. For an m×n array design, only m+n channels and wires are required to complete positioning and signal acquisition. Compared with the prior art, only the same number of wires as the conductive film sheet sub-electrodes are required to complete voltage data acquisition, which can effectively reduce the number of wires and the number of acquisition channels. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a stereogram of the encoding electrode;

[0030] Figure 2 is the main view of the elastic layer;

[0031] Figure 3 is the main view of the top electrode group;

[0032] Figure 4 is a main view of the pressure sensitive array layer;

[0033] Figure 5 is a front view of the bottom electrode group;

[0034] Figure 6 It is the main view of the substrate;

[0035] Figure 7 It is a stereoscopic diagram of the force measurement and calibration module;

[0036] Figure 8 It is a diagram of the algorithm for encoding electrode array positioning;

[0037] Figure 9 It is a page diagram displayed on the electronic screen;

[0038] Figure 10 It is a structural stereogram of the encoding electrode array;

[0039] Figure 11 This is a diagram of the connection method for signal acquisition of the encoding electrode array;

[0040] Figure 12 This is a picture of a physical racket (showing the self-driven encoding electrode array and signal acquisition and processing circuit);

[0041] Figure 13 This is a diagram of an embodiment of an intelligent self-driven table tennis racket system. DETAILED DESCRIPTION

[0042] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention.

[0043] Example 1:

[0044] The first embodiment of the present invention provides a coding electrode for array structure information collection, such as Figures 1 to 6 and Figure 10 As shown, the device comprises a substrate, a bottom electrode group, a pressure-sensitive array layer, a top electrode group, and an elastic layer stacked sequentially on the substrate. The present invention employs multiple conductive membrane sub-electrodes within each electrode group. Positioning and signal acquisition are performed by intersecting two conductive membrane sub-electrodes from different electrode groups. For an m×n array design, positioning and signal acquisition require only m+n channels and conductors, significantly reducing the number of channels required for signal acquisition.

[0045] In the specific design, such as Figure 3 As shown, the top electrode group consists of m long strips of conductive film sub-electrodes arranged in parallel laterally, and each sub-electrode is denoted as A0, A1, A2,…, Ai,…, Am-1 in sequence. The thickness of the conductive film sub-electrode is 0-10mm, and the material used is limited to conductive material.

[0046] like Figure 5 As shown, the bottom electrode group consists of n long strips of conductive film sub-electrodes arranged in parallel in the longitudinal direction. The sub-electrodes are respectively denoted as B0, B1, B2, ..., ..., Bn-1. The thickness of the conductive film sub-electrodes is 0-10mm, and the material used is limited to conductive material.

[0047] like Figure 4As shown, the pressure-sensitive array layer is composed of m×n pressure-sensitive membranes, each of which is placed one by one in the middle gap position of the m×n overlapping units formed by the intersection of the top electrode group and the bottom electrode group. The size of each pressure-sensitive membrane is greater than or equal to the size of each overlapping unit formed by the intersection of the top electrode group and the bottom electrode group. The pressure-sensitive membrane is composed of a material with triboelectric effect or piezoelectric effect. The thickness of the pressure-sensitive membrane is 0-100mm. A pressure-sensitive membrane together with the elastic layer, top electrode group, bottom electrode group and substrate in the upper and lower projection directions constitute a basic unit of the array, i = 0, 1, 2, ..., m-1, j = 0, 1, 2, ... n-1.

[0048] like Figure 2 As shown, the thickness of the elastic layer is 0-100 mm, and the material of the elastic layer includes insulating material.

[0049] like Figure 6 As shown, the thickness of the substrate is 0-100 mm, and the material used is limited to insulating and non-conductive materials.

[0050] A pressure-sensitive membrane, the conductive membrane sub-electrode corresponding to its projection, the elastic layer and the substrate constitute an array basic unit, and multiple array basic units constitute a signal acquisition array.

[0051] Example 2:

[0052] Based on the first embodiment, the second embodiment of the present invention provides a signal acquisition method of a coding electrode for array structure information acquisition, which specifically includes the following steps:

[0053] Step 1: Preset the external force threshold and pre-process to obtain the voltage thresholds of the top electrode group and the bottom electrode group under the corresponding external force threshold:

[0054] like Figure 1 and Figure 7 As shown, a preset external force threshold F0 is used, and a force measurement calibration module equivalent to an array basic unit in the array structure is designed. That is, the force measurement calibration module includes an elastic layer, a top electrode (containing only one conductive film sub-electrode), a pressure-sensitive film (one piece), a bottom electrode (containing only one conductive film sub-electrode) and a substrate stacked in sequence from top to bottom. The size and material of the elastic layer, top electrode, pressure-sensitive film, bottom electrode and substrate in the force measurement calibration module are the same as those of the array basic unit in the array structure. F0 is applied to the force measurement calibration module, and the voltages generated by the top electrode and the bottom electrode of the force measurement calibration module are respectively recorded as V Amin and V Bmin , which is the voltage threshold of the top electrode group and the bottom electrode group under the corresponding external force threshold, such as Figure 7 As shown;

[0055] Step 2: Calibrate the external force position:

[0056] like Figure 8 As shown in the figure, when an external force of unknown strength is applied to the array structure, the output voltage generated by each conductive film sub-electrode of the top electrode group is recorded as V Ai The output voltage generated by each conductive film sub-electrode of the bottom electrode group is recorded as V Bi .when When the output voltage of the bottom electrode is When the code value bj of the corresponding position is set to 1, otherwise bj is set to 0. For any position unit Ai×Bj in the array structure, if the code ai=1 and bj=1, it can be determined that the position is acted upon by an external force.

[0057] Step 3: Classify the external force:

[0058] As shown in the following table:

[0059]

[0060] V Amin As a benchmark, when When , the force intensity is judged to be level 0; when When , the force intensity is judged to be level 1; when When , the force intensity is judged to be level 2; and so on, when When the force is determined to be K level.

[0061] Step 4: Display the external force position and magnitude on the screen:

[0062] like Figure 9 As shown, a certain area in the electronic display screen is divided into m rows and n columns, and each unit is marked as A' i× B′ j , where i=0,1,2,…,m-1,j=0,1,2,…n-1; each unit A′ of the electronic display screen i× B ′ j With each unit A of the array structure i ×B j Positions are one to one correspondence. i ×B j When subjected to external force, the position calibration method of the array structure receiving the external force and the intensity grading calibration method of the array structure receiving the external force are used to calibrate the position of the electronic display screen corresponding to the unit A. ′ i× B ′ j The corresponding color grayscale or color brightness is displayed on the screen.

[0063] Example 3:

[0064] Embodiment 3 of the present invention provides a signal acquisition system, comprising the encoding electrode described in any one of Embodiment 1, and a signal acquisition circuit, a signal processing circuit, an analog-to-digital conversion circuit and a computer that are communicatively connected, and each of the conductive film sub-electrodes is connected to the signal acquisition circuit to complete the method described in any one of Embodiment 2.

[0065] like Figure 13 As shown, each conductive membrane sub-electrode is connected to the interface of the signal acquisition circuit through a lead wire. The electrical signal generated by the piezoelectric effect or triboelectric effect of the pressure-sensitive membrane in an array basic unit Ai×Bj is collected and sent to the signal acquisition circuit interface by the leads of the top electrode group sub-electrode Ai and the bottom electrode group sub-electrode Bj respectively.

[0066] like Figures 11 to 13 As shown, in the specific design, the conductive film sub-electrode in the bottom electrode group is made of copper foil, such as Figure 12 As shown, the signal acquisition circuit, signal processing circuit and analog-to-digital conversion circuit are integrated on the PCB board, as shown in FIG. Figure 13 As shown, a Bluetooth module is provided on the PCB board, and the PCB board is connected to the computer via the Bluetooth module.

[0067] In specific applications, this signal acquisition system can be applied to table tennis rackets to establish a self-driven hitting point distribution statistics system with table tennis rackets as the monitoring object, such as Figure 11 and Figure 12 As shown, this embodiment divides the racket surface into 9 areas, which are arranged in order from top to bottom and from left to right. The system collects the voltage signals at the sub-electrodes connected to the conductive film sheets A1, A2, A3, B1, B2 and B3 in real time, as shown in FIG. Figure 11 As shown, during data collection, the above-mentioned conductive film sub-electrodes are respectively connected to the Ch1 to Ch6 signal collection channels; when the table tennis ball hits the surface of the racket, an obvious output signal will be generated at the impact position. Through the multi-channel data collection method, the real-time voltage signal is monitored, and after being processed by the signal processing circuit and the analog-to-digital conversion circuit, it is sent to the computer via Bluetooth. The computer terminal displays the relevant data of the ball hitting during the training process in real time, thereby providing technical support for athletes to evaluate their training.

[0068] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0069] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the steps in the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0070] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0071] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0072] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A signal acquisition method for encoding electrodes for array structure information acquisition, characterized by: The encoding electrodes include: A substrate, and a bottom electrode group, a pressure sensitive array layer, a top electrode group and an elastic layer stacked on the substrate in sequence; The bottom electrode group and the top electrode group each include a plurality of conductive film sub-electrodes; The pressure sensitive array layer includes a plurality of pressure sensitive membranes, and pressure sensitive membranes are arranged at the intersections of the conductive membrane sub-electrodes of the bottom electrode group and the conductive membrane sub-electrodes of the top electrode group; A pressure-sensitive membrane, a conductive membrane sub-electrode corresponding to its projection, an elastic layer and a substrate constitute an array basic unit, and multiple array basic units constitute a signal acquisition array; Signal acquisition methods include: Preset the external force threshold, and pre-process to obtain the voltage thresholds of the top electrode group and the bottom electrode group corresponding to the external force threshold; After the external force is applied, the position of the external force is calibrated based on the voltage thresholds of the top electrode group and the bottom electrode group, and the magnitude of the external force is graded; Display the external force position and magnitude on the display screen; The preprocessing step to obtain the voltage thresholds of the top electrode group and the bottom electrode group corresponding to the external force threshold includes: Preset a force measurement calibration module equivalent to an array basic unit; Applying a force of an external force threshold value to the force measurement calibration module to obtain the voltage thresholds of the top electrode group and the bottom electrode group; Calibration of external force position includes: Obtain the voltages generated by the conductive film sub-electrodes of the top electrode group and the bottom electrode group when receiving external force. If both are greater than or equal to the threshold voltage of the corresponding electrode group, record the voltages of the corresponding two conductive film sub-electrodes and calibrate the position of the external force. The classification of external forces includes: The voltages generated by the conductive film sub-electrodes of the top electrode group and the bottom electrode group when receiving external force are obtained, and the voltages are rounded with the threshold voltages of the corresponding electrode groups to grade the magnitude of the external force.

2. The signal acquisition method of encoding electrodes for array structure information acquisition according to claim 1, characterized in that: The conductive film sub-electrodes in the bottom electrode group are arranged in parallel, and the conductive film sub-electrodes in the top electrode group are arranged in parallel; The conductive film sub-electrodes in the bottom electrode group and the conductive film sub-electrodes in the top electrode group are vertically staggered.

3. The signal acquisition method of encoding electrodes for array structure information acquisition according to claim 1, characterized in that: The thickness of the elastic layer is 0 mm to 100 mm, and the material of the elastic layer includes insulating material.

4. The signal acquisition method of encoding electrodes for array structure information acquisition according to claim 1, characterized in that: The thickness of the conductive film sheet sub-electrode is 0 mm to 10 mm, and the material of the conductive film sheet sub-electrode includes conductive material.

5. The signal acquisition method of encoding electrodes for array structure information acquisition according to claim 1, characterized in that: The thickness of the pressure sensitive membrane is 0 mm to 100 mm, and the projection of the pressure sensitive membrane covers the intersection surface of the two conductive membrane sub-electrodes on which it is located.

6. A signal acquisition system, characterized in that: The signal acquisition system is used to implement the signal acquisition method according to any one of claims 1 to 5, comprising a signal acquisition circuit, a signal processing circuit, an analog-to-digital conversion circuit, and a computer that are communicatively connected; Each of the conductive film sub-electrodes is connected to a signal acquisition circuit.

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