Sensor electrode plate fixing structure capable of improving reliability and vibration sensor

Abstract

The utility model provides a sensor electrode plate fixing structure capable of improving reliability. The sensor electrode plate fixing structure is characterized by comprising a piezoelectric sensor, a positive electrode plate and a negative electrode plate which are stacked, the opposite sides of two adjacent piezoelectric sensors are positive electrodes, and the opposite sides of the two adjacent piezoelectric sensors are negative electrodes; the positive electrode plate is arranged between two adjacent piezoelectric sensors; the negative electrode plate comprises two first parts and a second part connected between the two first parts; the first parts are arranged on the opposite sides of the two adjacent piezoelectric sensors respectively, and the two first parts are conducted and connected through the second parts. The utility model also provides a vibration sensor which uses the sensor electrode slice fixing structure.

Description

Technical Field

[0001] This utility model relates to a sensor, and more particularly to a vibration sensor. Background Technology

[0002] The sensor device is installed on the underground water supply pipeline to collect the pipeline's minute vibration data. After the pipeline vibration is transmitted to the sensor, it squeezes the piezoelectric ceramic plate, generating an electric charge, which is collected by metal electrode plates and transferred to the circuit board for processing.

[0003] Each sensor's piezoelectric ceramic assembly uses two piezoelectric ceramic pieces stacked together, with the top and bottom sides being the negative electrodes and the middle joint being the positive electrode.

[0004] refer to Figures 1-3 The original sensor structure consisted of two metal electrodes: an upper negative electrode (6) and a middle positive electrode (5) connected at the junction. In this configuration, the negative electrode of the lower piezoelectric ceramic was connected to the upper negative electrode (6) via the sensor base and housing. This structure allowed for the acquisition of pipe vibrations by the two piezoelectric ceramics. However, due to the excessive contact area between the lower piezoelectric ceramic negative electrode and the upper negative electrode (6), long-term use could lead to increased resistance due to oxidation and loosening, reducing sensor sensitivity and potentially causing malfunctions. Utility Model Content

[0005] The main technical problem to be solved by this utility model is to provide a sensor electrode plate fixing structure that reduces the transmission path between the negative electrode plate and the positive electrode plate and increases reliability.

[0006] To solve the above-mentioned technical problems, this utility model provides a sensor electrode sheet fixing structure to improve reliability, including: a piezoelectric sensor, a positive electrode sheet and a negative electrode sheet stacked together;

[0007] The side facing each other of two adjacent piezoelectric sensors is the positive electrode, and the side facing away from each other is the negative electrode; the positive electrode sheet is disposed between two adjacent piezoelectric sensors; the negative electrode sheet includes two first parts and a second part connected between the two first parts; the first parts are respectively disposed on the side facing away from each other of the two adjacent piezoelectric sensors, and the second part connects the two first parts.

[0008] In a preferred embodiment: the piezoelectric sensor is a piezoelectric ceramic sheet.

[0009] This invention also provides a vibration sensor that uses the sensor electrode sheet fixing structure described above.

[0010] In a preferred embodiment: a housing, a base, and a circuit board; the housing and the base are assembled to form a cavity for accommodating the piezoelectric sensor, the positive electrode plate, the negative electrode plate, and the circuit board; the positive and negative terminals of the circuit board are respectively connected to the positive electrode plate and the negative electrode plate.

[0011] In a preferred embodiment, the piezoelectric sensor is clamped between the circuit board and the base.

[0012] In a preferred embodiment: the circuit board is provided with a channel for bolts to pass through, the piezoelectric sensor, the positive electrode plate and the negative electrode plate are provided with clearance openings at the positions corresponding to the channel, and the base is provided with threaded holes at the positions corresponding to the clearance openings.

[0013] In a preferred embodiment: the inner wall of the channel extends radially inward with a raised edge, and when the bolt is connected to the threaded hole, the nut of the bolt abuts against the raised edge.

[0014] In a preferred embodiment: the base has a recessed cavity on the side facing the circuit board for placing the piezoelectric sensor, the positive electrode plate and the negative electrode plate, and the bottom of the recessed cavity has the threaded hole.

[0015] Compared with the prior art, the technical solution of this utility model has the following beneficial effects:

[0016] This invention provides a sensor electrode fixing structure to improve reliability. The negative electrode is divided into two first parts and a second part connecting the two first parts. This allows for conductive connection between the two first parts, making the transmission paths between the two first parts and the positive conductive sheet identical. Compared to existing technologies, this significantly reduces the transmission path and contact area of ​​one of the negative electrode pieces. Consequently, it greatly increases the sensor's sensitivity and reduces the failure rate. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of a sensor in the prior art;

[0018] Figure 2 An isometric view of the negative electrode sheet in the prior art;

[0019] Figure 3 This is a front view of the negative electrode sheet in the prior art;

[0020] Figure 4 This is a cross-sectional view of the sensor in a preferred embodiment of the present invention;

[0021] Figure 5 This is an isometric view of the negative electrode sheet in a preferred embodiment of the present invention;

[0022] Figure 6This is a schematic diagram showing the unfolded negative electrode sheet in a preferred embodiment of the present invention;

[0023] Figure 7 for Figure 4 A magnified view of a portion of the image. Detailed Implementation

[0024] To make the technical solution and features of this utility model clearer, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific examples. It should be understood that these examples are only for illustrating this utility model and are not intended to limit the scope of this utility model. After reading this utility model, any modifications of this utility model by those skilled in the art in various equivalent forms fall within the scope defined by the appended claims.

[0025] refer to Figures 4-7 This embodiment provides a vibration sensor, comprising a housing 1, a base 2, a circuit board 3, and two stacked piezoelectric sensors 4, a positive electrode 5, and a negative electrode 6; the housing 1 and the base 2 are assembled to form a cavity for accommodating the piezoelectric sensors 4, the positive electrode 5, the negative electrode 6, and the circuit board 3; the positive and negative electrodes of the circuit board 3 are respectively connected to the positive electrode 5 and the negative electrode 6.

[0026] In this embodiment, the structural design of the negative electrode plate 6 improves the fixing structure of the sensor electrode plate, thereby reducing the transmission path between the negative electrode plate 6 and the positive electrode plate 5 and increasing reliability. Specifically,

[0027] Two piezoelectric sensors 4 are arranged with their opposite sides as positive electrodes and their opposite sides as negative electrodes. The positive electrode 5 is positioned between two adjacent piezoelectric sensors 4. The negative electrode 6 comprises two first portions 61 and a second portion 62 connecting the two first portions 61. The first portions 61 are positioned on opposite sides of the two adjacent piezoelectric sensors 4, and the second portion 62 connects the two first portions 61. In this way, the negative electrodes of the two piezoelectric sensors 4 are directly connected through the negative electrode 6, forming a circuit. The two first portions 61 are also connected only through the second portion 62, significantly reducing the distance between them and minimizing contact surfaces. Therefore, even after long-term use, the negative electrodes of the two piezoelectric sensors 4 remain stably connected, preventing increased resistance and potential sensor sensitivity reduction or malfunction due to oxidation, loosening, or other factors.

[0028] The piezoelectric sensor 4 in this embodiment is a piezoelectric ceramic sheet. Of course, other piezoelectric sensors 4 existing in the prior art can also be used, which is a simple replacement for this embodiment.

[0029] To secure the piezoelectric sensor 4, in this embodiment, the piezoelectric sensor 4 is clamped between the circuit board 3 and the base 2. Specifically, the circuit board 3 has a channel 31 through which the bolt 7 passes. The piezoelectric sensor 4, the positive electrode 5, and the negative electrode 6 have clearance openings at positions corresponding to the channel 31. The base 2 has threaded holes at positions corresponding to the clearance openings. Thus, the bolt 7 can pass through the channel 31, through the clearance openings, and into the threaded holes, ultimately securing the circuit board 3 and the base 2, thereby clamping the piezoelectric sensor 4 between the circuit board 3 and the base 2.

[0030] Furthermore, it is necessary to control the connection strength between the circuit board 3 and the base 2 to avoid the gap between the control board and the base 2 being too small, which would cause excessive squeezing force on the piezoelectric sensor 4 and damage it. A raised edge 32 extends radially inward from the inner wall of the channel 31. When the bolt 7 is connected to the threaded hole, the nut of the bolt 7 abuts against the raised edge 32. The raised edge 32 limits the depth to which the bolt 7 can penetrate the threaded hole, thus preventing the aforementioned situation from occurring.

[0031] Finally, the base 2 has a recessed cavity on the side facing the circuit board 3 for placing the piezoelectric sensor 4, the positive electrode 5, and the negative electrode 6. A threaded hole is provided at the bottom of the recessed cavity. This recessed cavity design allows for the positioning of the piezoelectric sensor 4, the positive electrode 5, and the negative electrode 6, ensuring that their positions automatically align with the threaded hole without requiring excessive calibration.

[0032] The above is only one specific embodiment of the present utility model, but the design concept of the present utility model is not limited thereto. Any non-substantial modifications made to the present utility model using this concept shall be deemed as an infringement of the protection scope of the present utility model.

Claims

1. A sensor electrode sheet fixing structure for improving reliability, characterized by The application relates to a sensor electrode sheet fixing structure. The piezoelectric sensor is a piezoelectric ceramic sheet. The application relates to a sensor electrode sheet fixing structure.

2. The sensor electrode sheet fixing structure according to claim 1, characterized by: The application relates to a sensor electrode sheet fixing structure.

3. A vibration sensor, characterized by The piezoelectric sensor is a piezoelectric ceramic sheet.

4. A vibration sensor according to claim 3, characterised in that The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure.

5. A vibrating sensor according to claim 4, wherein: The application relates to a sensor electrode sheet fixing structure.

6. A vibrating sensor according to claim 5, wherein: The application relates to a sensor electrode sheet fixing structure.

7. A vibrating sensor according to claim 6, characterised in that: The application relates to a sensor electrode sheet fixing structure.

8. A vibrating sensor according to claim 6, wherein: The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure. The application relates to a sensor electrode sheet fixing structure

Images