Expansion force monitoring device and method and electric vehicle

Abstract

The invention discloses an expansive force monitoring device and method and an electric vehicle. The expansive force monitoring device comprises a frame body and a pressure sensor. An inner cavity with an open top is arranged in the frame body, the inner cavity is used for placing a to-be-tested piece, the plurality of pressure sensors are divided into a plurality of vertical columns, each column comprises at least two pressure sensors, the fixed ends of the pressure sensors in the same column are stacked up and down, the positions of mounting holes in the fixed ends are aligned, and a plurality of connecting holes are formed in the edge of the top of the frame body. The fixed ends of each column of pressure sensors correspond to one connecting hole, and the loading ends of different pressure sensors are in contact with different positions of the surface of the to-be-tested piece; the output end of the pressure sensor is connected with a peripheral circuit. According to the invention, objects can be monitored in real time, the expansion point can be rapidly judged, the expansion force can be detected, the cost is low, the measurement accuracy is high, and the calculated amount is low.

Description

Technical Field

[0001] The present invention belongs to the field of swelling force monitoring, and relates to a swelling force monitoring device, method and electric vehicle. Background Art

[0002] In industries such as food, medicine, medical and health, intelligent driving, batteries, and mining machinery, there is a high possibility of swelling of items in enclosed spaces. Existing monitoring of objects that may swell generally uses optical monitoring methods, acoustic emission monitoring methods, and volume change monitoring methods.

[0003] The optical monitoring method uses a laser or fiber optic sensor to measure the deformation or displacement of an item. The advantages are non-contact and strong anti-interference ability, while the disadvantages are high equipment cost and complex operation; the acoustic emission monitoring method judges the internal stress state by monitoring the acoustic wave signals generated during the swelling process of the item. The advantages are real-time monitoring and suitability for detecting hidden defects, while the disadvantages are the need for complex data analysis; the volume change monitoring method indirectly infers the swelling force by measuring the volume change of the item. The advantages are simple and intuitive, while the disadvantages are low accuracy and the need to be used in combination with other methods. Summary of the Invention

[0004] The purpose of the present invention is to overcome the above-mentioned disadvantages of the prior art and provide a swelling force monitoring device, method and electric vehicle, which can monitor items in real time, quickly judge the swelling point, detect the swelling force, with low cost, high measurement accuracy, and low calculation amount.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions: A swelling force monitoring device includes a frame body and pressure sensors; An inner cavity with an open top is arranged in the frame body, and the inner cavity is used to place the item to be measured. The number of pressure sensors is multiple, divided into several vertical columns, and each column includes at least two pressure sensors. The fixed ends of the pressure sensors in the same column are stacked up and down, and the positions of the mounting holes of the fixed ends are aligned. A plurality of connection holes are arranged at the top edge of the frame body, and the fixed ends of each column of pressure sensors commonly correspond to one connection hole. The loading ends of different pressure sensors are in contact with different positions on the surface of the item to be measured; The output end of the pressure sensor is connected to a peripheral circuit.

[0006] Preferably, when the item to be measured has a planar structure, its top surface is flush with the top surface of the frame body; the bottoms of the loading ends of the pressure sensors are in the same plane and form a surface contact with the top surface of the item to be measured.

[0007] Preferably, when the component under test has a curved surface structure, its top surface protrudes from the top surface of the frame body; the bottom of the loading end of each pressure sensor is set to a matching concave surface or convex surface according to the curved surface contour, and the loading ends of the pressure sensors in different layers in the same column are distributed with a height offset in the vertical direction.

[0008] Preferably, when the component under test has a curved surface or inclined surface structure, its top surface protrudes from the top surface of the frame body; the bottom of the loading end of each pressure sensor is set to a matching inclined surface according to the curved surface / inclined surface contour, and the loading ends of the pressure sensors in different layers in the same column are distributed with a height offset in the vertical direction.

[0009] Preferably, fastening screws are used to pass through the fixing end mounting holes of all the pressure sensors in the same column and the corresponding connection holes to lock and fix the pressure sensors in the column to the frame body.

[0010] Preferably, the contact areas between the loading ends of the pressure sensors and the surface of the component under test are arranged in an array, and the coverage area is greater than or equal to 95% of the top surface area of the component under test.

[0011] Preferably, the peripheral circuit integrates a signal amplification circuit, an analog-to-digital conversion circuit and an MCU, and is connected to a host computer through a communication module.

[0012] Preferably, the signal amplification circuit includes a differential amplifier and a low-pass filter, and the analog-to-digital conversion circuit uses a 16-bit resolution ADC chip.

[0013] An electric vehicle includes a solid-state battery and the expansion force monitoring device. The solid-state battery is installed in the inner cavity of the frame body of the expansion force monitoring device, and the top surface of the solid-state battery is flush with the top surface of the frame body.

[0014] An expansion force monitoring method includes: Assigning a unique ID number to each pressure sensor; Placing the component under test into the inner cavity of the frame body; Monitoring the deformation of the loading ends of each pressure sensor when the surface of the component under test is subjected to an expansion force; Amplifying and converting the analog signal corresponding to the deformation into a digital signal of each pressure sensor through the peripheral circuit; Based on the ID number, analyzing the position of the loading end of the pressure sensor to which each digital signal belongs to determine the expansion point; Obtaining the expansion force value information of this area according to the force value of the pressure sensor at the expansion point.

[0015] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, since the loading end of the pressure sensor contacts different positions on the surface of the workpiece to be measured, when the workpiece to be measured undergoes expansion deformation, the pressure sensor at the corresponding position undergoes micro-displacement adjustment, enabling accurate determination of the expansion position. Furthermore, based on the force value received by the pressure sensor at the expansion point, the expansion force value information of this area can be obtained. The cost is relatively low, the measurement accuracy is high, and the calculation amount is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 FIG. is a schematic front-sectional structure diagram of the expansion force monitoring device according to an embodiment of the present invention; Figure 2 FIG. is a top view of the frame mounting the workpiece to be measured according to an embodiment of the present invention; Figure 3 FIG. is a schematic left-sectional structure diagram of the expansion force monitoring device according to an embodiment of the present invention; Figure 4 FIG. is an effect diagram of a pressure sensor detecting the expansion force according to an embodiment of the present invention; Figure 5 FIG. is an effect diagram of two pressure sensors detecting the expansion force according to an embodiment of the present invention; Figure 6 FIG. is an effect diagram of three pressure sensors detecting the expansion force according to an embodiment of the present invention.

[0017] Wherein: 1 - bottom plate; 2 - frame; 3 - pressure sensor; 4 - peripheral circuit; 5 - fastening screw; 6 - workpiece to be measured. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The following details the embodiments of the present invention. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0019] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this invention belongs. The terms "mounted", "connected" and "coupled" should be interpreted in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection, an electrical connection or a connection capable of mutual communication; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. The term "and / or" used herein includes any and all combinations of one or more of the related listed items. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0021] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numerals and / or reference letters in different examples. Such repetition is for the purpose of simplification and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.

[0022] As Figure 1-3 shown, a swelling force monitoring device according to the present invention includes a bottom plate 1, a frame 2, a pressure sensor 3, a peripheral circuit 4, fastening screws 5, and a test piece 6.

[0023] The top of the bottom plate 1 is connected to the bottom of the frame 2. The bottom plate 1 serves as the support and fixing member of the expansion force monitoring device. During the connection process of the bottom plate 1 and the frame 2, it is ensured that the outer dimensions are the same, the frame edges are aligned, and the hole positions are aligned.

[0024] An inner cavity with an open top is provided inside the frame 2. The inner cavity is used to place the test piece 6. The test piece 6 is precisely installed in the inner cavity of the frame 2. The inner cavity of the frame is of the same volume as the test piece 6 to ensure normal installation.

[0025] The number of pressure sensors 3 is multiple, specifically determined according to the number required to fully cover the surface of the test piece 6. Preferably, the coverage area is greater than or equal to 95% of the surface area of the test piece 6. They are divided into several vertical columns, and each column includes at least two pressure sensors 3.

[0026] The fixed ends of the pressure sensors 3 in the same column are stacked vertically, and the positions of the mounting holes of the fixed ends are aligned. Several connection holes are provided at the top edge of the frame 2. The fixed ends of each column of pressure sensors 3 jointly correspond to one connection hole. The loading ends of different pressure sensors 3 are in contact with different positions on the surface of the test piece 6 to achieve full coverage of the surface of the test piece. A fastening screw 5 passes through the fixed ends of each column of pressure sensors 3 and the corresponding connection holes to fix each column of pressure sensors 3 on the frame 2, and ensure that the edges of the frame 2 and the pressure sensors 3 are aligned.

[0027] When the top of the test piece 6 is a flat surface, the top surface of the frame 2 is flush with the top surface of the test battery 6. The bottoms of the loading ends of different pressure sensors 3 are all located on the same plane, and thus the bottoms of the loading ends of different pressure sensors 3 are in surface contact with different positions on the surface of the test piece 6.

[0028] When the top of the test piece 6 is an inclined surface, the top surface of the test battery 6 protrudes from the top surface of the frame 2. The bottoms of the loading ends of different pressure sensors 3 are all located on different horizontal planes. The bottoms of the loading ends of the pressure sensors 3 are set as adapted inclined surfaces according to the shape of the top of the test piece 6, and the loading ends of different layers of pressure sensors 3 in the same column are located at different heights. The bottoms of the loading ends of different pressure sensors 3 are in surface contact with different positions on the surface of the test piece 6.

[0029] When the top of the test piece 6 is an inclined surface, the top surface of the test battery 6 protrudes from the top surface of the frame 2. The bottoms of the loading ends of different pressure sensors 3 are all located on different horizontal planes. The bottoms of the loading ends of the pressure sensors 3 are set as adapted concave or convex surfaces according to the shape of the top of the test piece 6, and the loading ends of different layers of pressure sensors 3 in the same column are located at different heights. The bottoms of the loading ends of different pressure sensors 3 are in surface contact with different positions on the surface of the test piece 6.

[0030] The output terminal of each pressure sensor 3 is connected to the peripheral circuit 4. The peripheral circuit 4 includes a signal amplification circuit, an analog-to-digital conversion circuit, and an MCU. The peripheral circuit 4 is connected to the host computer through a communication module. The signal amplification circuit includes a differential amplifier and a low-pass filter. The analog-to-digital conversion circuit uses a 16-bit resolution ADC chip.

[0031] An ID number is edited for each pressure sensor 3 and integrated into the software image through software.

[0032] The process of using the above-mentioned expansion force monitoring device to determine the expansion point and monitor the expansion force of the workpiece 6 to be measured is as follows: When the workpiece 6 to be measured is subjected to an expansion force in different regions, the loading end of the pressure sensor 3 in the corresponding region is stressed, causing the pressure sensor 3 to deform. The pressure sensor 3 outputs a voltage signal and a corresponding ID number. The voltage signal is transmitted to the peripheral circuit at the back end. The circuit module classifies and analyzes the voltage signal, and at the same time converts the voltage signal into a digital signal, determines the ID number corresponding to the voltage information, and then determines the position of the expansion point according to the regional position of the loading end of each pressure sensor 3 corresponding to the ID number. Finally, the actual position information of the expansion point is determined, and then the expansion force value information of this region is obtained according to the force value of the pressure sensor 3 at the expansion point.

[0033] Specifically, as Figure 4 shown, through the host computer software, when the loading end of 1 pressure sensor 3 is stressed and deformed, it is integrated into the software image through software. At the same time, the voltage signal is converted into a digital signal. The position of the loading point is determined, and finally, through software processing, the actual position information of the loading point in 1 region can be effectively reflected, and then the force value information is obtained.

[0034] As Figure 5 shown, through the host computer software, when the loading ends of 2 pressure sensors 3 are stressed and deformed, they are integrated into the software image through software. At the same time, the voltage signal is converted into a digital signal. The position of the loading point is determined, and finally, through software processing, the actual position information of the loading point in 2 regions can be effectively reflected, and then the force value information is obtained.

[0035] As Figure 6 shown, through the host computer software, when the loading ends of 3 pressure sensors 3 are stressed and deformed, they are integrated into the software image through software. At the same time, the voltage signal is converted into a digital signal. The position of the loading point is determined, and finally, through software processing, the actual position information of the loading point in 3 regions can be effectively reflected, and then the force value information is obtained.

[0036] By analogy according to the above test and implementation scheme, the expansion force of the expansion points at different positions can be monitored.

[0037] The substance inside the test piece 6 is solid, gas or liquid. Specifically, in this embodiment, the test piece 6 is a solid-state battery.

[0038] This embodiment also provides an electric vehicle, including a solid-state battery and the above-mentioned expansion force monitoring device. The solid-state battery is installed in the inner cavity of the frame 2 of the expansion force monitoring device, and the top surface of the solid-state battery is flush with the top surface of the frame 2.

[0039] When the solid-state battery undergoes expansion deformation, the relative pressure sensor 3 undergoes micro-displacement adjustment. Since the pressure sensors 3 are arranged in an array, this distribution method is suitable for detecting the position distribution of the force on the surface of the solid-state battery. There is a host computer configured at the back end. When there is local expansion force in the solid-state battery, the measurement device and method can help R & D personnel select appropriate pre-tightening force, precise reserved cell spacing, and appropriate elastic filling materials when designing the battery module of the solid-state battery, and can measure the distribution of the expansion force at different positions on the surface of the cell. Its structure is simple, light in weight, and easy to install. This causes the pressure sensors 3 to have different output signals, and this kind of signal is transmitted to the peripheral circuit 4 at the back end. The peripheral circuit 4 outputs different changes corresponding to each sensor at different positions, and the host computer determines and gives feedback on the magnitude and position of the applied force value.

[0040] The serial numbers of the above-mentioned embodiments of the present application are only for description and do not represent the advantages or disadvantages of the embodiments.

[0041] In the above-mentioned embodiments of the present application, the descriptions of each embodiment have their own emphases. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0042] In the several embodiments provided by the present application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only illustrative. For example, the division of the units can be a logical function division. In actual implementation, there can be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point, the couplings or direct couplings or communication connections shown or discussed with each other can be through some interfaces. The indirect couplings or communication connections of the units or modules can be in electrical or other forms.

[0043] The units described as separate components may or may not be physically separated. The components shown as units may or may not be physical units, that is, they can be located in one place, or they can be distributed to multiple units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0044] The above are only the preferred embodiments of the present application. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present application.

[0045] It should be understood that the above description is for illustrative purposes and not for limitation. Many embodiments and many applications other than the examples provided will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of this patent should not be determined by reference to the above description, but rather by reference to the full scope of the foregoing claims and the equivalents thereof. For the sake of completeness, all articles and references including patent applications and published announcements are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the foregoing claims is not intended to abandon such subject matter, nor should it be considered that the applicant has not considered such subject matter as part of the disclosed inventive subject matter.

Claims

1. An expansion force monitoring device, characterized in that: It comprises a frame (2) and a pressure sensor (3); An inner cavity with an open top is provided in the frame (2), and the inner cavity is used to place the test piece (6). The pressure sensors (3) are multiple in number and are divided into multiple vertical columns, and each column includes at least two pressure sensors (3). The fixed ends of the pressure sensors (3) in the same column are stacked up and down, and the positions of the mounting holes of the fixed ends are aligned. The top edge of the frame (2) is provided with multiple connection holes, and the fixed ends of each column of pressure sensors (3) correspond to a common connection hole. The loading ends of different pressure sensors (3) contact different positions on the surface of the test piece (6); The output end of the pressure sensor (3) is connected to a peripheral circuit (4).

2. The expansion force monitoring device according to claim 1, characterized in that: When the test piece (6) is a planar structure, its top surface is flush with the top surface of the frame (2); the bottom of the loading end of the pressure sensor (3) is in the same plane and forms surface contact with the top surface of the test piece.

3. The expansion force monitoring device according to claim 1, characterized in that: When the test piece (6) is a curved surface structure, its top surface protrudes from the top surface of the frame (2); the bottom of the loading end of each of the pressure sensors (3) is set as an adaptive inner concave surface or outer convex surface according to the curved surface contour, and the loading ends of the pressure sensors in different layers in the same row are highly staggered in the vertical direction.

4. The expansion force monitoring device according to claim 1, characterized in that: When the test piece (6) is a curved surface or inclined surface structure, its top surface protrudes from the top surface of the frame (2); the bottom of the loading end of each of the pressure sensors (3) is set as an adaptive inclined surface according to the curved surface / inclined surface profile, and the loading ends of the pressure sensors in different layers in the same column are highly staggered in the vertical direction.

5. The expansion force monitoring device according to claim 1, characterized in that: The fastening screws (5) are passed through the fixed end mounting holes and corresponding connection holes of all the pressure sensors (3) in the same row, so as to lock and fix the pressure sensors (3) in the row to the frame (2).

6. The expansion force monitoring device according to claim 1, characterized in that: The contact areas between the loading ends of the pressure sensors (3) and the surface of the test piece are arranged in an array, and the coverage area is greater than or equal to 95% of the top surface area of ​​the test piece (6).

7. The expansion force monitoring device according to claim 1, characterized in that: The peripheral circuit (4) integrates a signal amplification circuit, an analog-to-digital conversion circuit and an MCU, and is connected to a host computer via a communication module.

8. The expansion force monitoring device according to claim 7, characterized in that: The signal amplification circuit includes a differential amplifier and a low-pass filter, and the analog-to-digital conversion circuit adopts a 16-bit resolution ADC chip.

9. An electric vehicle, characterized in that: It comprises a solid-state battery and the expansion force monitoring device according to any one of claims 1 to 8, wherein the solid-state battery is installed in the inner cavity of a frame (2) of the expansion force monitoring device, and the top surface of the solid-state battery is flush with the top surface of the frame (2).

10. A method for monitoring expansion force based on the device according to any one of claims 1 to 8, characterized in that: include: Each pressure sensor (3) is provided with a unique ID number; Place the test piece (6) into the inner cavity of the frame (2); Monitoring the deformation amount of each pressure sensor (3) at the loading end when the surface of the test piece (6) is subjected to expansion force; The analog signal corresponding to the deformation amount is amplified by a peripheral circuit and converted into a digital signal of each pressure sensor (3); Analyze the position of the loading end of the pressure sensor (3) to which each digital signal belongs based on the ID number to determine the expansion point; According to the force value of the pressure sensor (3) at the expansion point, expansion force value information of the area is obtained.

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