Capacitive displacement detection structure and electronic equipment
By designing a capacitive displacement detection structure of long strip capacitive plates, array side plates and conductive dielectrics, the problem of difficulty in realizing large stroke detection in the prior art is solved, and a large stroke detection function with simple structure, low cost and strong anti-interference ability is realized.
Patent Information
- Application Number
- CN202421948818.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-12
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-08-12
AI Technical Summary
The existing capacitive displacement detection structure is difficult to achieve large stroke detection and cannot meet the needs of long and large stroke displacement detection in some application scenarios.
A capacitive displacement detection structure including a long strip capacitive plate, an array side plate and a conductive dielectric is designed. Capacitance is formed by coupling the conductive dielectric with the capacitance plate and the side plate. The capacitance signal changes as the conductive dielectric moves, and the detection circuit connects the conductive dielectric and the side plate to achieve large stroke detection.
It realizes the function of large stroke detection, with a simple structure, low cost and strong anti-interference ability, and is suitable for application scenarios where slender and large stroke structure displacements are detected.
Smart Images
Figure CN222978782U_ABST
Abstract
Description
Technical Field
[0001] Embodiments of the present utility model relate to the technical field of electronic devices, and particularly to a capacitive displacement detection structure and an electronic device. Background Art
[0002] Displacement detections such as translational displacement and rotational displacement are widely demanded in production and life. Since the capacitive displacement detection structure has characteristics such as low cost and high precision, the capacitive displacement detection structure is widely used. In some application scenarios, it is necessary to detect the displacement of a slender and large-stroke structure. Therefore, designing a capacitive displacement detection structure capable of realizing large-stroke detection is an urgent problem to be solved. Summary of the Utility Model
[0003] The purpose of the embodiments of the present utility model is to provide a capacitive displacement detection structure and an electronic device, aiming to design a capacitive displacement detection structure capable of realizing large-stroke detection.
[0004] To solve the above technical problems, the embodiments of the present utility model provide a capacitive displacement detection structure, including:
[0005] Capacitor plates;
[0006] Side plates, the side plates are arranged at intervals with the capacitor plates, and at least three of the side plates are arranged along the extension direction of the capacitor plates on one side of the capacitor plates;
[0007] A conductive medium, the conductive medium is spaced relative to the capacitor plates and the side plates, and the capacitor plates and at least three of the side plates are coupled through the conductive medium to form a capacitor. The conductive medium is movably arranged relative to the capacitor plates along the extension direction of the capacitor plates, so that the capacitance signal changes with the movement of the conductive medium;
[0008] A detection circuit, the detection circuit is electrically connected to the conductive medium and at least three of the side plates;
[0009] The size of the side plates in the extension direction of the capacitor plates is L, and the size of the part of the conductive medium spaced relative to the side plates in the extension direction of the capacitor plates is L1, where L≤L1≤2L.
[0010] The capacitive displacement detection structure of the present utility model can realize large-stroke detection by designing a long-strip capacitor plate and an array of side plates. The capacitive displacement detection structure has a simple structure, low cost, and strong anti-interference ability.
[0011] Preferably, the side plates are square.
[0012] Preferably, the side plates are arranged in a right-angled triangle, and the nth side plate among at least three side plates is spliced with the (n + 1)th side plate to form a square, where n is an odd number.
[0013] Preferably, the capacitor plates and at least three side plates are in the same plane.
[0014] Preferably, the capacitive displacement detection structure further includes a grounding portion, which is in the same plane as the capacitor plates, is located between the capacitor plates and at least three side plates, and is arranged to extend along the extension direction of the capacitor plates.
[0015] Preferably, L < L1. At least three side plates include a first side plate, a second side plate, a third side plate, and a fourth side plate arranged in sequence along the extension direction of the capacitor plates. The first end of the detection circuit is electrically connected to the first side plate and the fourth side plate, the second end of the detection circuit is electrically connected to the second side plate, and the third end of the detection circuit is electrically connected to the third side plate.
[0016] Preferably, L < L1. At least three side plates include a first side plate, a second side plate, a third side plate, a fourth side plate, and a fifth side plate arranged in sequence along the extension direction of the capacitor plates. The first end of the detection circuit is electrically connected to the first side plate and the fifth side plate, the second end of the detection circuit is electrically connected to the second side plate, the third end of the detection circuit is electrically connected to the third side plate, and the fourth end of the detection circuit is electrically connected to the fourth side plate.
[0017] Preferably, L < L1. At least three side plates include a first side plate, a second side plate, a third side plate, a fourth side plate, a fifth side plate, and a sixth side plate arranged in sequence along the extension direction of the capacitor plates. The first end of the detection circuit is electrically connected to the first side plate and the fifth side plate, the second end of the detection circuit is electrically connected to the second side plate, the third end of the detection circuit is electrically connected to the third side plate and the sixth side plate, and the fourth end of the detection circuit is electrically connected to the fourth side plate.
[0018] Preferably, the capacitor plates are emitting plates and the side plates are receiving plates.
[0019] Preferably, the capacitor plates are arranged in a long strip shape.
[0020] Preferably, the conductive medium is arranged in a square shape.
[0021] To achieve the above object, the present invention further provides an electronic device including the above capacitive displacement detection structure. Description of the Drawings
[0022] One or more embodiments are exemplarily illustrated by the pictures in the corresponding drawings. These exemplary illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements, unless otherwise stated. The drawings in the figures do not constitute a scale limitation.
[0023] Figure 1 The top view of the capacitive displacement detection structure provided by the first embodiment of the present invention;
[0024] Figure 2 is Figure 1 the side view of the capacitive displacement detection structure in
[0025] Figure 3 The top view of the capacitive displacement detection structure provided by the second embodiment of the present invention;
[0026] Figure 4 is Figure 3 the corresponding relationship between the capacitive signal and the stroke d of the capacitive displacement detection structure in
[0027] Figure 5 The top view of the capacitive displacement detection structure provided by the third embodiment of the present invention;
[0028] Figure 6 is Figure 5 the corresponding relationship between the capacitive signal and the stroke d of the capacitive displacement detection structure in
[0029] Figure 7 The top view of the capacitive displacement detection structure provided by the fourth embodiment of the present invention;
[0030] Figure 8 The top view of the capacitive displacement detection structure provided by the fifth embodiment of the present invention;
[0031] Figure 9 The top view of the capacitive displacement detection structure provided by the sixth embodiment of the present invention.
[0032] Description of the reference numerals in the drawings of the present invention:
[0033] Capacitive plate Tx, side plate Rx, first side plate Rx1, second side plate Rx2, third side plate Rx3, fourth side plate Rx4, fifth side plate Rx5, sixth side plate Rx6, conductive medium Mx, grounding part GND.
[0034] The realization of the object, functional features and advantages of the present invention will be further described with reference to the embodiments and the drawings. Detailed implementation manners
[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0036] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.
[0037] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.
[0038] The present utility model provides a capacitive displacement detection structure. Figure 1 and Figure 2 shows a first embodiment of the capacitive displacement detection structure provided by the present utility model.
[0039] Please refer to Figure 1 and Figure 2 , in the first embodiment, the capacitive displacement detection structure includes a capacitive plate Tx, side plates Rx, a conductive medium Mx, and a detection circuit (not shown in the figure).
[0040] Please refer to Figure 1 and Figure 2 , the side plates Rx are arranged at intervals with the capacitive plate Tx, and at least three side plates Rx are arranged on one side of the capacitive plate Tx along the extending direction of the capacitive plate Tx.
[0041] Specifically, one of the capacitive plates Tx and the side plates Rx is the transmitting plate, and the other is the receiving plate. In the first embodiment, the capacitive plate Tx is the transmitting plate, and the side plate Rx is the receiving plate. In other embodiments, the capacitive plate Tx is the receiving plate, and the side plate Rx is the transmitting plate. Hereinafter, the case where the capacitive plate Tx is the transmitting plate and the side plate Rx is the receiving plate will be taken as an example for introduction.
[0042] The capacitive plate Tx and at least three side plates Rx can be located on the same plane; the capacitive plate Tx and at least three side plates Rx can also be located on two planes respectively. For example, the capacitive plate Tx and at least three side plates Rx are located on two planes that are perpendicular or parallel to each other. Optionally, please refer to Figure 1 and Figure 2 , in the first embodiment, the capacitive plate Tx and at least three side plates Rx are located on the same plane. Hereinafter, the case where the capacitive plate Tx and at least three side plates Rx are located on the same plane will be taken as an example for introduction.
[0043] The capacitive plate Tx is arranged in a long strip shape extending along a straight line. Hereinafter, the extension direction of the capacitive plate Tx is defined as the up-down direction. The dimensions of the capacitive plate Tx, the side plate Rx, and the conductive medium Mx in the up-down direction are the height, and the dimensions of the capacitive plate Tx, the side plate Rx, and the conductive medium Mx in the horizontal direction are the width.
[0044] At least three side plates Rx are located on one side of the capacitive plate Tx in the horizontal direction. At least three side plates Rx are spaced from the capacitive plate Tx in the horizontal direction, and at least three side plates Rx are arranged along the up-down direction. The gaps between at least three side plates Rx need to be as small as possible, and it can be approximately considered that the gaps between at least three side plates Rx are 0. The number of side plates Rx is three, four or more, and the specific number of side plates Rx can be increased or decreased according to the actual situation.
[0045] Optionally, please refer to Figure 1 and Figure 2 , in the first embodiment, there are four side plates Rx, and the four side plates Rx are the first side plate Rx1, the second side plate Rx2, the third side plate Rx3, and the fourth side plate Rx4 respectively. Hereinafter, the case where there are four side plates Rx will be taken as an example for introduction.
[0046] The specific shape of the side plate Rx can be set according to the actual situation. The side plate Rx can be arranged in a square, triangular or trapezoidal shape, etc. Optionally, please refer to Figure 1 , in the first embodiment, the side plate Rx is arranged in a square shape.
[0047] Optionally, please refer to Figure 7, in the fourth embodiment, the side plate Rx is arranged in a right triangle, and the nth side plate Rx among at least three side plates Rx and the (n + 1)th side plate Rx are spliced into a square, where n is an odd number.
[0048] Specifically, the hypotenuse of the first side plate Rx1 faces the hypotenuse of the second side plate Rx2, so that the first side plate Rx1 and the second side plate Rx2 are spliced into a square. The third side plate Rx3 and the fourth side plate Rx4 are located below the first side plate Rx1 and the second side plate Rx2, and the hypotenuses of the third side plate Rx3 and the fourth side plate Rx4 face each other, so that the third side plate Rx3 and the fourth side plate Rx4 are spliced into a square.
[0049] Optionally, please refer to Figure 1 and Figure 2 , in the first embodiment, the capacitive displacement detection structure further includes a grounding portion GND. The grounding portion GND is on the same plane as the capacitor plate Tx, and the grounding portion GND is located between the capacitor plate Tx and at least three side plates Rx. The grounding portion GND is arranged to extend along the extending direction of the capacitor plate Tx.
[0050] Specifically, the grounding portion GND is arranged in a long strip shape extending along the up-down direction. The capacitor plate Tx, the grounding portion GND, the first side plate Rx1, the second side plate Rx2, the third side plate Rx3, and the fourth side plate Rx4 are on the same plane, and this plane is fixed, so it is convenient for circuit connection. In other embodiments, the grounding portion GND can be omitted.
[0051] Please refer to Figure 1 and Figure 2 , the conductive medium Mx is spaced relative to the capacitor plate Tx and the side plate Rx. The capacitor plate Tx and at least three side plates Rx are coupled through the conductive medium Mx to form a capacitor. The conductive medium Mx is arranged to be movable along the extending direction of the capacitor plate Tx relative to the capacitor plate Tx, so that the capacitance signal changes with the movement of the conductive medium Mx. The detection circuit is electrically connected to the conductive medium Mx and at least three side plates Rx.
[0052] Specifically, the conductive medium Mx can be arranged in a plate shape or a sheet shape, etc. Optionally, please refer to Figure 1 and Figure 2, in the first embodiment, the conductive medium Mx is arranged in a square shape. Hereinafter, the case where the conductive medium Mx is arranged in a square shape will be taken as an example for introduction. The material of the conductive medium Mx is generally selected as a conductive metal, and the conductive medium Mx is in a floating state and not connected to the circuit. The conductive medium Mx is fixed on the working block that moves up and down, and the conductive medium Mx can move synchronously with the working block. The width of the conductive medium Mx is generally greater than the sum of the width of the capacitor plate Tx, the width of the side plate Rx, and the distance between the capacitor plate Tx and the side plate Rx. The conductive medium Mx can be appropriately widened so that the conductive medium Mx can completely cover the outside of the capacitor plate Tx and the side plate Rx.
[0053] The capacitor plate Tx and the side plate Rx are coupled through the conductive medium Mx to form a capacitor. The capacitance size is related to the effective area of the coupling. It can be clearly seen from Figure 1 that there is a clear linear relationship between the coupling area and the stroke d. Therefore, by detecting the change of the capacitance value, the stroke d of the conductive medium Mx (i.e., the working block) can be calculated.
[0054] Please refer to Figure 1 and Figure 2 , the dimension of the side plate Rx in the extending direction of the capacitor plate Tx is L, and the dimension of the part of the conductive medium Mx spaced relative to the side plate Rx in the extending direction of the capacitor plate Tx is L1, where L ≤ L1 ≤ 2L.
[0055] Specifically, the height of the side plate Rx is L, and the height of the conductive medium Mx is L1. If the height of the conductive medium Mx is less than the height of the side plate Rx, there will be a detection blind area. If the height of the conductive medium Mx is greater than the height of two side plates Rx, it will affect the capacitance of more than three side plates Rx, which is not convenient for subsequent data processing. By limiting the height of the conductive medium Mx to be not less than the height of one side plate Rx and not greater than the height of two side plates Rx, when the conductive medium Mx moves, it will affect the capacitance of at most three side plates Rx, which is convenient for subsequent data processing and there will be no detection blind area.
[0056] Optionally, please refer to Figure 3 , in the second embodiment, L1 = L. The height of the conductive medium Mx is equal to the height of the side plate Rx. When the conductive medium Mx is at the starting position, the upper end of the conductive medium Mx is flush with the upper end of the first side plate Rx1. During the entire movement of the conductive medium Mx, the change relationships of the capacitances formed by the capacitor plate Tx, the first side plate Rx1, the second side plate Rx2, the third side plate Rx3, and the fourth side plate Rx4 are as shown in Figure 4 .
[0057] Optionally, please refer to Figure 5, in the third embodiment, L1 = 1.5L. The height of the conductive medium Mx is equal to 1.5 times the height of the side plate Rx. When the conductive medium Mx is in the starting position, the upper end of the conductive medium Mx is flush with the upper end of the first side plate Rx1. During the entire movement of the conductive medium Mx, the variation relationships of the capacitances respectively formed by the capacitor plates Tx, the first side plate Rx1, the second side plate Rx2, the third side plate Rx3, and the fourth side plate Rx4 are as Figure 6 shown.
[0058] The capacitive displacement detection structure of the present utility model can achieve large-stroke detection by designing the strip-shaped capacitor plate Tx and the array-type side plates Rx. The capacitive displacement detection structure has a simple structure, low cost, and strong anti-interference ability.
[0059] The detection circuit can be a detection chip, etc. A plurality of side plates Rx are all electrically connected to the detection circuit. The detection circuit is usually arranged in a plurality of Rx channels. The number of Rx channels can be greater than or equal to the number of side plates Rx. When the number of Rx channels of the detection chip is insufficient, the effective stroke can be extended by connecting two side plates Rx to the same Rx channel.
[0060] Optionally, please refer to Figure 1 , in the first embodiment, L < L1. At least three side plates Rx include a first side plate Rx1, a second side plate Rx2, a third side plate Rx3, and a fourth side plate Rx4 that are sequentially arranged along the extension direction of the capacitor plate Tx. The first end of the detection circuit is electrically connected to the first side plate Rx1 and the fourth side plate Rx4. The second end of the detection circuit is electrically connected to the second side plate Rx2. The third end of the detection circuit is electrically connected to the third side plate Rx3.
[0061] Specifically, when the conductive medium Mx moves between the first side plate Rx1 and the second side plate Rx2, the detection circuit can determine the stroke d of the conductive medium Mx according to the capacitance signals received by the first end and the second end; when the conductive medium Mx moves between the second side plate Rx2 and the third side plate Rx3, the detection circuit can determine the stroke d of the conductive medium Mx according to the capacitance signals received by the second end and the third end; when the conductive medium Mx moves between the third side plate Rx3 and the fourth side plate Rx4, the detection circuit can determine the stroke d of the conductive medium Mx according to the capacitance signals received by the third end and the first end.
[0062] Optionally, please refer to Figure 8, in the fifth embodiment, L < L1, and at least three side plates Rx include a first side plate Rx1, a second side plate Rx2, a third side plate Rx3, a fourth side plate Rx4, and a fifth side plate Rx5 that are sequentially arranged along the extension direction of the capacitor plate Tx. The first end of the detection circuit is electrically connected to the first side plate Rx1 and the fifth side plate Rx5, the second end of the detection circuit is electrically connected to the second side plate Rx2, the third end of the detection circuit is electrically connected to the third side plate Rx3, and the fourth end of the detection circuit is electrically connected to the fourth side plate Rx4.
[0063] Specifically, when the conductive medium Mx moves between the first side plate Rx1 and the second side plate Rx2, the detection circuit can determine the travel distance d of the conductive medium Mx according to the capacitance signals received by the first end and the second end; when the conductive medium Mx moves between the second side plate Rx2 and the third side plate Rx3, the detection circuit can determine the travel distance d of the conductive medium Mx according to the capacitance signals received by the second end and the third end; when the conductive medium Mx moves between the third side plate Rx3 and the fourth side plate Rx4, the detection circuit can determine the travel distance d of the conductive medium Mx according to the capacitance signals received by the third end and the fourth end; when the conductive medium Mx moves between the fourth side plate Rx4 and the fifth side plate Rx5, the detection circuit can determine the travel distance d of the conductive medium Mx according to the capacitance signals received by the fourth end and the first end.
[0064] Optionally, in other embodiments, L < L1, and at least three side plates Rx include a first side plate Rx1, a second side plate Rx2, a third side plate Rx3, a fourth side plate Rx4, and a fifth side plate Rx5 that are sequentially arranged along the extension direction of the capacitor plate Tx. The first end of the detection circuit is electrically connected to the first side plate Rx1, the second end of the detection circuit is electrically connected to the second side plate Rx2 and the fifth side plate Rx5, the third end of the detection circuit is electrically connected to the third side plate Rx3, and the fourth end of the detection circuit is electrically connected to the fourth side plate Rx4.
[0065] Specifically, when the conductive medium Mx moves between the first side plate Rx1 and the second side plate Rx2, the detection circuit can determine the travel distance d of the conductive medium Mx according to the capacitance signals received by the first end and the second end; when the conductive medium Mx moves between the second side plate Rx2 and the third side plate Rx3, the detection circuit can determine the travel distance d of the conductive medium Mx according to the capacitance signals received by the second end and the third end; when the conductive medium Mx moves between the third side plate Rx3 and the fourth side plate Rx4, the detection circuit can determine the travel distance d of the conductive medium Mx according to the capacitance signals received by the third end and the fourth end; when the conductive medium Mx moves between the fourth side plate Rx4 and the fifth side plate Rx5, the detection circuit can determine the travel distance d of the conductive medium Mx according to the capacitance signals received by the fourth end and the second end.
[0066] Optionally, refer to Figure 9 , in the sixth embodiment, L < L1, at least three side plates Rx include a first side plate Rx1, a second side plate Rx2, a third side plate Rx3, a fourth side plate Rx4, a fifth side plate Rx5, and a sixth side plate Rx6 that are sequentially arranged along the extension direction of the capacitor plate Tx. The first end of the detection circuit is electrically connected to the first side plate Rx1 and the fifth side plate Rx5, the second end of the detection circuit is electrically connected to the second side plate Rx2, the third end of the detection circuit is electrically connected to the third side plate Rx3 and the sixth side plate Rx6, and the fourth end of the detection circuit is electrically connected to the fourth side plate Rx4.
[0067] Specifically, when the conductive medium Mx moves between the first side plate Rx1 and the second side plate Rx2, the detection circuit can determine the travel d of the conductive medium Mx according to the capacitance signals received at the first end and the second end; when the conductive medium Mx moves between the second side plate Rx2 and the third side plate Rx3, the detection circuit can determine the travel d of the conductive medium Mx according to the capacitance signals received at the second end and the third end; when the conductive medium Mx moves between the third side plate Rx3 and the fourth side plate Rx4, the detection circuit can determine the travel d of the conductive medium Mx according to the capacitance signals received at the third end and the fourth end; when the conductive medium Mx moves between the fourth side plate Rx4 and the fifth side plate Rx5, the detection circuit can determine the travel d of the conductive medium Mx according to the capacitance signals received at the fourth end and the first end; when the conductive medium Mx moves between the fifth side plate Rx5 and the sixth side plate Rx6, the detection circuit can determine the travel d of the conductive medium Mx according to the capacitance signals received at the first end and the third end.
[0068] The present invention also provides an electronic device, which includes a working block and a capacitive displacement detection structure.
[0069] Specifically, the working block can move up and down. The capacitive displacement detection structure is the above-mentioned capacitive displacement detection structure. The conductive medium Mx of the capacitive displacement detection structure is arranged on the working block that moves up and down, and the conductive medium Mx and the working block can move synchronously. Since the capacitive displacement detection structure adopts the technical solution of the above embodiment, it has the beneficial effects brought by the technical solution of the above embodiment.
[0070] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made by using the content of the specification and drawings of the present invention under the inventive concept of the present invention, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.
Claims
1. A capacitive displacement detection structure, characterized in that: include: Capacitor plates; A side electrode plate, wherein the side electrode plate is spaced apart from the capacitor electrode plate, and at least three side electrode plates arranged along the extension direction of the capacitor electrode plate are disposed on one side of the capacitor electrode plate; A conductive medium, wherein the conductive medium is spaced apart from the capacitor plate and the side plates, the capacitor plate and at least three side plates are coupled via the conductive medium to form a capacitor, and the conductive medium is arranged to be movable along the extension direction of the capacitor plate relative to the capacitor plate, so that the capacitance signal changes with the movement of the conductive medium; A detection circuit, the detection circuit being electrically connected to the conductive medium and at least three of the side plates; The dimension of the side plate in the extension direction of the capacitor plate is L, and the dimension of the portion of the conductive medium opposite to the side plate in the extension direction of the capacitor plate is L1, where L≤L1≤2L.
2. The capacitive displacement detection structure according to claim 1, characterized in that: The side electrode plates are arranged in a square shape; or, the side electrode plates are arranged in a right triangle shape, and the nth side electrode plate and the n+1th side electrode plate among at least three side electrode plates are spliced to form a square, wherein n is an odd number.
3. The capacitive displacement detection structure according to claim 1, characterized in that: The capacitor plate and at least three side plates are located on the same plane.
4. The capacitive displacement detection structure according to claim 3, characterized in that: The capacitive displacement detection structure also includes a grounding portion, which is located on the same plane as the capacitor plate, and is located between the capacitor plate and at least three side plates, and is extended along the extension direction of the capacitor plate.
5. The capacitive displacement detection structure according to claim 1, characterized in that: L<L1, at least three of the side plates include a first side plate, a second side plate, a third side plate, and a fourth side plate which are sequentially arranged along the extension direction of the capacitor plate, the first end of the detection circuit is electrically connected to the first side plate and the fourth side plate, the second end of the detection circuit is electrically connected to the second side plate, and the third end of the detection circuit is electrically connected to the third side plate.
6. The capacitive displacement detection structure according to claim 1, characterized in that: L<L1, at least three of the side plates include a first side plate, a second side plate, a third side plate, a fourth side plate, and a fifth side plate which are sequentially arranged along the extension direction of the capacitor plate, the first end of the detection circuit is electrically connected to the first side plate and the fifth side plate, the second end of the detection circuit is electrically connected to the second side plate, the third end of the detection circuit is electrically connected to the third side plate, and the fourth end of the detection circuit is electrically connected to the fourth side plate.
7. The capacitive displacement detection structure according to claim 1, characterized in that: L<L1, at least three of the side plates include a first side plate, a second side plate, a third side plate, a fourth side plate, a fifth side plate, and a sixth side plate which are sequentially arranged along the extension direction of the capacitor plate, a first end of the detection circuit is electrically connected to the first side plate and the fifth side plate, a second end of the detection circuit is electrically connected to the second side plate, a third end of the detection circuit is electrically connected to the third side plate and the sixth side plate, and a fourth end of the detection circuit is electrically connected to the fourth side plate.
8. The capacitive displacement detection structure according to claim 1, characterized in that: The capacitor plate is an emitter plate, and the side plate is a receiving plate.
9. The capacitive displacement detection structure according to claim 1, characterized in that: The capacitor plates are arranged in a strip shape; and / or the conductive medium is arranged in a square shape.
10. An electronic device, characterized in that: It comprises a capacitive displacement detection structure as described in any one of claims 1-9.