A force measuring instrument, force measuring method, device and system based on friction nanogenerator

Abstract

The application relates to the technical field of measuring instruments, and discloses a force measuring instrument based on friction nanogeneration, a force measuring method, equipment and a system. The body of the force measuring instrument comprises a reference layer, an intermediate layer and a friction layer with a grid structure which are arranged in layers; the reference layer and the friction layer are made of volatile electronic materials, and the intermediate layer is made of volatile electronic materials; when the force measuring instrument is applied with a force with the same size along the grid direction of the grid structure and along the direction perpendicular to the grid direction, the size of the applied force is determined based on the size of the voltage signals frictionally output by the reference layer and the intermediate layer, and the direction of the applied force is determined based on the ratio of the voltage signals frictionally output by the friction layer and the intermediate layer to the voltage signals frictionally output by the reference layer and the intermediate layer or the ratio of the change amounts of the two. The measurement result of the application is not affected by environmental parameters and the range is not limited, and the application has the advantages of stable and reliable performance, high referenceability and wide application.

Description

Technical Field

[0001] This invention relates to the field of measuring instrument technology, and in particular to a force measuring instrument, force measuring method, equipment and system based on triboelectric nanogenerator. Background Technology

[0002] A force gauge is a portable measuring instrument used to measure various forces or loads. It is also known as a force meter and is widely used in industries such as electrical, packaging, automotive and food processing.

[0003] Commonly used force measuring instruments include strain gauges and spring force gauges. Strain gauges measure force based on the principle of resistance strain, consisting of a full-bridge circuit composed of high-grade foil strain gauges bonded to an elastic body of the sensor. When subjected to a load, the elastic body deforms, and the strain gauges sense the strain, causing the bridge circuit to become unbalanced and output an electrical signal proportional to the magnitude of the applied force. Spring force gauges measure force based on the principle that the force on a spring is proportional to the magnitude of its elastic deformation.

[0004] However, current spring force gauges have limited measuring ranges due to the constraints of their own elastic modulus. Some strain gauges, because the support point for force application is the operator's arm, cannot measure slightly heavier objects. Furthermore, the aforementioned force measuring instruments only display the magnitude of the force during measurement, failing to fully represent the actual parameters of the measured product, resulting in poor reference value and susceptibility to errors due to environmental factors.

[0005] Triboelectric nanogenerators are an emerging power generation technology in recent years. The principle involves the friction (contact) of two materials with different triboelectric sequences, generating electrostatic charges of different polarities on their surfaces. When the contact surfaces separate, corresponding induced electrostatic charges are generated on their respective metal electrodes, creating a potential difference. It boasts advantages such as simple structure, low manufacturing cost, and high conversion efficiency. It can effectively convert low-frequency, low-amplitude mechanical energy into electrical energy to power small electronic devices. Furthermore, the output potential difference signal can be used to measure relevant physical parameters, demonstrating broad application prospects and development potential. Summary of the Invention

[0006] This invention provides a force measuring instrument, force measuring method, equipment and system based on triboelectric nanogenerator. It achieves force measurement based on triboelectric nanogenerator technology, which solves the technical problems of existing force measuring instruments, such as limited range, poor reference value and easy error generation.

[0007] The first aspect of the present invention provides a force measuring instrument based on triboelectric nanogenerator, comprising a force measuring instrument body, wherein the force measuring instrument body comprises a reference layer, an intermediate layer and a triboelectric layer having a grid structure stacked together;

[0008] Both the reference layer and the friction layer are made of a material that loses electrons, while the intermediate layer is made of a material that gains electrons.

[0009] According to one achievable method of the first aspect of the invention, the volatile electronic material is an active metallic material.

[0010] According to one achievable method of the first aspect of the invention, the readily available electronic material is a non-metallic material.

[0011] According to one achievable method of the first aspect of the invention, the grid structure is a ladder-shaped grid structure, a comb-shaped grid structure, or a fishbone-shaped grid structure.

[0012] According to one achievable method of the first aspect of the invention, the force gauge is based on a single-electrode mode.

[0013] According to one achievable method of the first aspect of the present invention, the reference layer, the intermediate layer and the friction layer are all sheet-like.

[0014] A second aspect of the present invention provides a force measurement method based on triboelectric nanogenerators, wherein the force measurement method is applied to a force measuring instrument based on triboelectric nanogenerators as described in any of the above embodiments, the method comprising:

[0015] When a force of equal magnitude is applied to the force gauge along the grid direction of the grid structure of the friction layer and along the direction perpendicular to the grid direction, a first voltage signal and a second voltage signal are acquired; the first voltage signal is the voltage signal output by the friction between the reference layer and the intermediate layer, and the second voltage signal is the voltage signal output by the friction between the friction layer and the intermediate layer.

[0016] The magnitude of the applied force is determined based on the magnitude of the first voltage signal;

[0017] The direction of the applied force is determined based on the ratio of the second voltage signal to the first voltage signal or the ratio of the change in the second voltage signal to the change in the first voltage signal.

[0018] A third aspect of the present invention provides a force measuring device based on triboelectric nanogenerators, comprising:

[0019] A memory for storing instructions; wherein the instructions are used to implement the force measurement method based on triboelectric nanogenerator as described in any of the above-mentioned ways;

[0020] A processor for executing instructions in the memory.

[0021] The fourth aspect of the present invention provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the force measurement method based on triboelectric nanogenerator as described in any of the above embodiments.

[0022] The fifth aspect of the present invention provides a force measurement system based on triboelectric nanogenerator, the force measurement system comprising a force measuring instrument based on triboelectric nanogenerator as described in any of the above embodiments;

[0023] The system further includes a data processing device; the data processing device is used for:

[0024] When a force of equal magnitude is applied to the force gauge along the grid direction of the grid structure of the friction layer and along the direction perpendicular to the grid direction, a first voltage signal and a second voltage signal are acquired; the first voltage signal is the voltage signal output by the friction between the reference layer and the intermediate layer, and the second voltage signal is the voltage signal output by the friction between the friction layer and the intermediate layer.

[0025] The magnitude of the applied force is determined based on the magnitude of the first voltage signal;

[0026] The direction of the applied force is determined based on the ratio of the second voltage signal to the first voltage signal or the ratio of the change in the second voltage signal to the change in the first voltage signal.

[0027] As can be seen from the above technical solutions, the present invention has the following advantages:

[0028] The force measuring instrument of the present invention includes a force measuring instrument body, which comprises a reference layer, an intermediate layer, and a friction layer with a grid structure stacked together. The reference layer and the friction layer are both made of a material that readily loses electrons, while the intermediate layer is made of a material that readily gains electrons. When a force of equal magnitude is applied to the force measuring instrument along the grid direction of the grid structure of the friction layer and along a direction perpendicular to the grid direction, the magnitude of the applied force is determined based on the magnitude of a first voltage signal, and the direction of the applied force is determined based on the ratio of a second voltage signal to the first voltage signal or the ratio of the change in the second voltage signal to the change in the first voltage signal. The first voltage signal is the voltage signal output by friction between the reference layer and the intermediate layer, and the second voltage signal is the voltage signal output by friction between the friction layer and the intermediate layer. This invention is based on Maxwell's displacement current principle, combined with triboelectric charging and electrostatic induction, and uses triboelectric nano-power generation technology to realize force measurement. The direction of the applied force is determined by the relative value, which is more stable and reliable, has higher reference value, and the measured results are not affected by environmental parameters, making it less prone to errors. The working principle is simple and novel, the measurement range accuracy is high and not limited by the measured object, and it has the advantages of stable working performance, low manufacturing cost, high conversion efficiency and wide application fields. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 A structural connection block diagram of a force measuring instrument based on triboelectric nanogenerator is provided as an optional embodiment of the present invention;

[0031] Figure 2 This is a schematic diagram of the stacking of each layer in the force measuring instrument body according to an optional embodiment of the present invention;

[0032] Figure 3 This is a schematic diagram of an optional embodiment of the present invention, showing a ladder-shaped grid structure.

[0033] Figure 4 This is a schematic diagram of a comb-shaped grid structure provided in an optional embodiment of the present invention;

[0034] Figure 5 This is a schematic diagram of a fishbone-shaped grid structure provided in an optional embodiment of the present invention;

[0035] Figure 6 The flowchart illustrates a force measurement method based on triboelectric nanogenerator, provided as an optional embodiment of the present invention.

[0036] Figure label:

[0037] 1-Force gauge body; 11-Reference layer; 12-Intermediate layer; 13-Friction layer. Detailed Implementation

[0038] This invention provides a force measuring instrument, force measuring method, equipment and system based on triboelectric nanogenerator, which solves the technical problems of existing force measuring instruments having limited range, poor reference value and easy to generate errors.

[0039] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0040] This invention provides a force measuring instrument based on triboelectric nanogenerator.

[0041] Figure 1 The diagram shows a structural connection block diagram of a force measuring instrument based on triboelectric nanogenerator provided in an embodiment of the present invention; Figure 2 A schematic diagram of the stacking of each layer in the force measuring instrument body provided in an embodiment of the present invention is shown.

[0042] Please see Figure 1 , Figure 2 The present invention provides a force measuring instrument based on triboelectric nanogenerator, comprising a force measuring instrument body 1, wherein the force measuring instrument body 1 comprises a reference layer 11, an intermediate layer 12 and a friction layer 13 having a grid structure stacked together; the reference layer 11 and the friction layer 13 are both made of a material that loses electrons, and the intermediate layer 12 is made of a material that gains electrons.

[0043] In this embodiment of the invention, force measurement is mainly achieved using triboelectric nanogenerator technology. This technology is based on Maxwell's displacement current principle and combines the combined effects of triboelectric charging and electrostatic induction to efficiently convert low-frequency mechanical energy, which is difficult to collect using traditional electromagnetic generators, into electrical energy (voltage signal). Specifically, during force measurement, a force of the same magnitude is applied along the grid direction of the grid structure of the friction layer 13 and along a direction perpendicular to the grid direction. Since the force measuring instrument body 1 is composed of stacked layers and is relatively thin overall, it can be assumed that the force on the reference layer 11 is the same as the force on the friction layer 13. This results in a significant difference between the frictional effect generated between the reference layer 11 and the intermediate layer 12 and the frictional effect generated between the friction layer 13 and the intermediate layer 12, leading to a significant difference in the output voltage signal. Therefore, the magnitude of the force can be measured by measuring the voltage signal output by the friction between the reference layer 11 and the intermediate layer 12, and U12 is not affected by the direction of the force. Conversely, the magnitude of the voltage signal output by the friction between the friction layer 13 and the intermediate layer 12 is affected by the direction of the applied force. Therefore, let U12 represent the voltage signal output by friction between the reference layer 11 and the intermediate layer 12, let U23 represent the voltage signal output by friction between the friction layer 13 and the intermediate layer 12, let ΔU12 represent the change in the voltage signal output by friction between the reference layer 11 and the intermediate layer 12 over a preset time period, and let ΔU23 represent the change in the voltage signal output by friction between the friction layer 13 and the intermediate layer 12 over a preset time period. The direction of the force can be obtained by comparing and analyzing the ratio U23 / U12 or the ratio ΔU23 / ΔU12 of their changes, and thus the applied force can be measured.

[0044] The above embodiments of the present invention have at least the following unexpected beneficial effects:

[0045] (1) Based on Maxwell's displacement current principle, combined with triboelectric charging and electrostatic induction, force measurement is achieved using triboelectric nano-power generation technology. The magnitude of the force is measured by the magnitude of the voltage signal output by the reference layer 11 and the intermediate layer 12 of the force measuring instrument body 1 (because the magnitude of the voltage signal output by the reference layer 11 and the intermediate layer 12 is independent of the direction of the force). The direction of the force is determined by comparing and analyzing the ratio of the magnitude of the voltage signal output by the reference layer 11 and the intermediate layer 12 to the magnitude of the voltage signal output by the friction layer 13 and the intermediate layer 12, or the ratio of the changes of the two. It can be seen that the measured comparison value is a relative value, which is more stable and reliable.

[0046] (2) The changes in environmental parameters have the same effect on the reference layer 11 and the friction layer 13. The results measured by the present invention will not be affected by environmental parameters such as temperature, humidity, and pressure (environmental parameters are generally independent of direction, while force is a vector that is related to direction).

[0047] (3) The working principle of the present invention is simple and novel, the working performance is stable and the maintenance is convenient. The measurement range accuracy is high and it is not limited by the measured object. It has the advantages of low manufacturing cost, high conversion efficiency and wide application field.

[0048] In one feasible implementation, the volatile material is an active metal material. As one embodiment, the active metal material includes at least one selected from lithium, sodium, potassium, beryllium, calcium, magnesium, cesium, and barium.

[0049] In one feasible manner, the readily available electronic material is a non-metallic material.

[0050] As one implementation method, the non-metallic material can be polytetrafluoroethylene (PTFE), which has the characteristic of readily gaining electrons and has good corrosion resistance.

[0051] The friction layer 13 can have different types of grid structures. In one feasible embodiment, the grid structure is a ladder-shaped grid structure, a comb-shaped grid structure, or a fishbone-shaped grid structure.

[0052] As a specific implementation method, the ladder-shaped grid structure is as follows: Figure 3 As shown, the comb-shaped grid structure is as follows Figure 4 As shown, the fishbone-shaped grid structure is as follows Figure 5 As shown.

[0053] Using different grid structures will result in different friction effects when the friction layer 13 is subjected to the same force in different directions, thus causing the strength of the output voltage signal to vary. Therefore, a corresponding grid structure can be set on the friction layer 13 according to the actual requirements for the strength of the output voltage signal.

[0054] In one feasible manner, the force gauge is based on a single-electrode mode.

[0055] In one feasible manner, the reference layer 11, the intermediate layer 12, and the friction layer 13 are all sheet-like.

[0056] The present invention also provides a force measurement method based on triboelectric nanogenerator, wherein the force measurement method is applied to the force measuring instrument based on triboelectric nanogenerator as described in any of the above embodiments.

[0057] Figure 6 A flowchart of a force measurement method based on triboelectric nanogenerator provided by an embodiment of the present invention is shown.

[0058] like Figure 6 As shown in the embodiment of the present invention, a force measurement method based on triboelectric nanogenerator includes:

[0059] Step S1: When the force measuring instrument is subjected to a force of equal magnitude along the grid direction of the grid structure of the friction layer 13 and along the direction perpendicular to the grid direction, a first voltage signal and a second voltage signal are acquired; the first voltage signal is the voltage signal output by the friction between the reference layer 11 and the intermediate layer 12, and the second voltage signal is the voltage signal output by the friction between the friction layer 13 and the intermediate layer 12.

[0060] Step S2: Determine the magnitude of the applied force based on the magnitude of the first voltage signal;

[0061] Step S3: Determine the direction of the applied force based on the ratio of the second voltage signal to the first voltage signal or the ratio of the change in the second voltage signal to the change in the first voltage signal.

[0062] In this embodiment of the invention, by utilizing the principle of triboelectric nanogeneration, a force of the same magnitude is applied along the grid direction and in a direction perpendicular to the grid direction, resulting in significantly different frictional effects. This leads to a significant difference between the voltage signal U12 output by the friction between the reference layer 11 and the intermediate layer 12 and the voltage signal U23 output by the friction between the friction layer 13 and the intermediate layer 12. Therefore, the magnitude of the force can be measured by measuring the magnitude of U12 (because the magnitude of the voltage signal of the reference layer 11 is independent of the direction of the force), and the direction of the force can be obtained based on the ratio U23 / U12 or the ratio of their changes ΔU23 / ΔU12. The force measurement method is simple and convenient.

[0063] This invention also provides a force measurement method and device based on triboelectric nanogenerators, comprising:

[0064] A memory for storing instructions; wherein the instructions are used to implement the force measurement method based on triboelectric nanogenerator as described in any of the above embodiments;

[0065] A processor for executing instructions in the memory.

[0066] The present invention also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the force measurement method based on triboelectric nanogenerator as described in any of the above embodiments.

[0067] The present invention also provides a force measurement system based on triboelectric nanogenerator, the force measurement system comprising the force measuring instrument based on triboelectric nanogenerator as described in any of the above embodiments;

[0068] The system further includes a data processing device; the data processing device is used for:

[0069] When a force of equal magnitude is applied to the force gauge along the grid direction of the grid structure of the friction layer 13 and along the direction perpendicular to the grid direction, a first voltage signal and a second voltage signal are acquired; the first voltage signal is the voltage signal output by the friction between the reference layer 11 and the intermediate layer 12, and the second voltage signal is the voltage signal output by the friction between the friction layer 13 and the intermediate layer 12.

[0070] The magnitude of the applied force is determined based on the magnitude of the first voltage signal;

[0071] The direction of the applied force is determined based on the ratio of the second voltage signal to the first voltage signal or the ratio of the change in the second voltage signal to the change in the first voltage signal.

[0072] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific beneficial effects of the force measuring methods, equipment, and systems described above can be referred to the corresponding beneficial effects in the aforementioned force measuring instrument embodiments, and will not be repeated here.

[0073] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A force measurement method based on triboelectric nanogenerators, characterized in that, A force measuring instrument based on triboelectric nanogenerator is used, wherein the force measuring instrument based on triboelectric nanogenerator includes a force measuring instrument body, wherein the force measuring instrument body includes a reference layer, an intermediate layer and a friction layer with a grid structure stacked together; Both the reference layer and the friction layer are made of a material that readily loses electrons, and the intermediate layer is made of a material that readily gains electrons; the method includes: When a force of equal magnitude is applied to the force gauge along the grid direction of the grid structure of the friction layer and along the direction perpendicular to the grid direction, a first voltage signal and a second voltage signal are acquired; the first voltage signal is the voltage signal output by the friction between the reference layer and the intermediate layer, and the second voltage signal is the voltage signal output by the friction between the friction layer and the intermediate layer. The magnitude of the applied force is determined based on the magnitude of the first voltage signal; The direction of the applied force is determined based on the ratio of the second voltage signal to the first voltage signal or the ratio of the change in the second voltage signal to the change in the first voltage signal.

2. The force measurement method based on triboelectric nanogenerator according to claim 1, characterized in that, The volatile electronic material is an active metallic material.

3. The force measurement method based on triboelectric nanogenerator according to claim 1, characterized in that, The readily available electronic material is a non-metallic material.

4. The force measurement method based on triboelectric nanogenerator according to claim 1, characterized in that, The grid structure is a ladder-shaped grid structure, a comb-shaped grid structure, or a fishbone-shaped grid structure.

5. The force measurement method based on triboelectric nanogenerator according to claim 1, characterized in that, The force gauge is based on a single-electrode mode.

6. The force measurement method based on triboelectric nanogenerator according to claim 1, characterized in that, The reference layer, the intermediate layer, and the friction layer are all sheet-like.

7. A force measuring device based on triboelectric nanogenerator, characterized in that, include: A memory for storing instructions; wherein the instructions are used to implement the force measurement method based on triboelectric nanogenerator as described in any one of claims 1-6; A processor for executing instructions in the memory.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the force measurement method based on triboelectric nanogenerator as described in any one of claims 1-6.

9. A force measurement system based on triboelectric nanogenerators, characterized in that, The force measuring system includes: A force measuring instrument based on triboelectric nano-power generation; the force measuring instrument based on triboelectric nano-power generation includes a force measuring instrument body, the force measuring instrument body includes a reference layer, an intermediate layer and a friction layer with a grid structure stacked together; the reference layer and the friction layer are both made of a material that loses electrons, and the intermediate layer is made of a material that gains electrons; Data processing device; the data processing device is used for: When a force of equal magnitude is applied to the force gauge along the grid direction of the grid structure of the friction layer and along the direction perpendicular to the grid direction, a first voltage signal and a second voltage signal are acquired; the first voltage signal is the voltage signal output by the friction between the reference layer and the intermediate layer, and the second voltage signal is the voltage signal output by the friction between the friction layer and the intermediate layer. The magnitude of the applied force is determined based on the magnitude of the first voltage signal; The direction of the applied force is determined based on the ratio of the second voltage signal to the first voltage signal or the ratio of the change in the second voltage signal to the change in the first voltage signal.

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