Batch detection device for pressure sensors

Abstract

The utility model relates to a batch detection device for pressure sensors, which comprises a base, a positioning plate, a needle plate and a top cover, the positioning plate is mounted on the upper surface of the base, the needle plate is mounted on the upper surface of the positioning plate, the top cover is mounted on the upper surface of the needle plate, the positioning plate is provided with a mounting seat, and a pressure sensor to be detected is mounted in the mounting seat. A ventilation connector is formed in the side face of the base, a ventilation loop is arranged on the base, the ventilation connector communicates with the ventilation loop, and the ventilation loop communicates with the installation base. A pin hole is formed in the pin plate, a PCB is arranged at the top of the pin plate, a probe is arranged in the pin hole, one end of the probe is connected with a wiring end of a pressure sensor to be tested, the other end of the probe is connected with the PCB, and a connecting wire is arranged on the PCB. The utility model can solve the problems that the wiring harness is difficult to correspond to the sensor and the wiring harness is easy to leak air during batch detection of the pressure sensor.

Description

Technical Field

[0001] The utility model belongs to the technical field of sensor detection, and in particular relates to a batch detection device for pressure sensors. Background Art

[0002] A pressure sensor is a device or apparatus that can sense pressure signals and convert them into usable output electrical signals according to certain rules; a pressure sensor is usually composed of a pressure sensitive element and a signal processing unit. According to different test pressure types, pressure sensors can be divided into gauge pressure sensors, differential pressure sensors and absolute pressure sensors; pressure sensors are the most commonly used sensors in industrial practice, and are widely used in various industrial automatic control environments, involving water conservancy and hydropower, railway transportation, intelligent buildings, production automatic control, aerospace, military industry, petrochemicals, oil wells, electricity, ships, machine tools, pipelines and many other industries; a pressure sensor is a pressure measuring device with a housing, a metal pressure interface and a high-level signal output. Many sensors are equipped with a round metal or plastic housing, with a cylindrical appearance, a pressure interface at one end and a cable or connector at the other end.

[0003] Pressure sensors need to be tested before leaving the factory. The pressure test is used to check whether the sensor signal is normal to determine whether the pressure sensor is good or bad. Traditional pressure testing is generally performed on a single sensor. When multiple tests are required, if a wiring harness is used for lead-out, there is a risk of air leakage at the lead-out point of the wiring harness. Secondly, too many wiring harnesses will cause connection difficulties and the wiring harness will be difficult to match with the sensor. Summary of the invention

[0004] The utility model provides a batch detection device for pressure sensors, so as to solve the problems that when the pressure sensors are detected in batches, the wiring harness is difficult to correspond to the sensor and the wiring harness is prone to leakage.

[0005] The technical solution of the utility model is as follows: A batch detection device for pressure sensors, comprising: a base, a positioning plate, a needle plate, a top cover and a fixing lock, the positioning plate being installed on the upper surface of the base, the needle plate being installed on the upper surface of the positioning plate, the top cover being installed on the upper surface of the needle plate, and the fixing lock being installed on both sides of the base and the top cover, and being used to press the base, the positioning plate, the needle plate and the top cover.

[0006] A mounting seat is provided on the positioning plate, and the pressure sensor to be tested is installed in the mounting seat. A ventilation interface is provided on the side of the base, and a ventilation circuit is provided on the base. The ventilation interface is connected to the ventilation circuit, and the ventilation circuit is connected to the mounting seat.

[0007] A pinhole is provided inside the pin plate, a PCB board is provided on the top, a probe is provided in the pinhole, one end of the probe is connected to the wiring terminal of the pressure sensor to be tested, and the other end of the probe is connected to the PCB board, and a connecting wire is provided on the PCB board.

[0008] Furthermore, the fixing lock comprises a wrench and a knob plunger, the bottom of the wrench is hinged to the base, a connecting through hole is provided on the wrench, and the knob plunger is threadedly connected to the connecting through hole.

[0009] Furthermore, the base and the top cover are both provided with positioning posts, the positioning plate and the needle plate are provided with corresponding positioning holes, and the positioning posts pass through the positioning holes.

[0010] Furthermore, an isolation groove is provided on the top cover, and the isolation groove is aimed at the probe.

[0011] Furthermore, the positioning plate includes: a limit plate and a fixed plate, the limit plate is installed above the fixed plate, a limit slot is provided on the limit plate, a limit hole is provided in the limit slot, the body of the pressure sensor to be tested is installed in the limit slot, the pressure detection port of the pressure sensor to be tested is installed in the limit hole, and a through hole is provided on the fixed plate, the through hole corresponds to the limit hole and is connected to the ventilation circuit.

[0012] Furthermore, the fixing plate is provided with fixing holes, the fixing holes and the through holes are arranged alternately, and the fixing holes are used to be fixed to the base.

[0013] Furthermore, a sealing ring is arranged in the via hole.

[0014] Beneficial effects of the utility model:

[0015] The utility model uses a needle plate, a probe and a PCB board to lead out the signal of the sensor placed in the positioning plate. The PCB board is welded with connecting wires, and the connecting wires are designed and arranged on the PCB board, so as to achieve a one-to-one correspondence between the derived signal and the internal sensor, realize the overall sealing of the device and the export of the signal, and realize batch testing of the sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model.

[0017] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model.

[0018] Figure 3 It is a schematic diagram of the base in the utility model.

[0019] Figure 4 It is a cross-sectional view of the base in the utility model.

[0020] Figure 5 It is a structural schematic diagram of the limiting plate in the utility model.

[0021] Figure 6 It is a structural schematic diagram of the fixing plate in the utility model.

[0022] Figure 7 It is a structural schematic diagram of the needle plate in the utility model. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. The described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0024] In an embodiment of the present utility model, Figure 1 and Figure 2 Schematic diagram of the structure of a batch detection device for pressure sensors according to the utility model. Figure 1 and Figure 2 As shown, the utility model comprises: a base 1, a positioning plate 2, a needle plate 3, a top cover 4 and a fixing lock 5.

[0025] Among them, the device comprises, from bottom to top, a base 1, a positioning plate 2, a needle plate 3, and a top cover 4. The positioning plate 2 is installed on the upper surface of the base 1, the needle plate 3 is installed on the upper surface of the positioning plate 2, and the top cover 4 is installed on the upper surface of the needle plate 3. The fixing lock 5 is installed on both sides of the base 1 and the top cover 4, and is used to press the base 1, the positioning plate 2, the needle plate 3 and the top cover 4. After pressing, the base 1, the positioning plate 2, the needle plate 3 and the top cover 4 form a sealed box structure.

[0026] The positioning plate 2 is provided with a plurality of mounting seats, in which the pressure sensors to be tested are mounted. Figure 3 and Figure 4 As shown, a ventilation interface 11 is provided on the side of the base 1, and a ventilation circuit 12 is provided on the base 1. The ventilation interface 11 is connected to the ventilation circuit 12, and specifically, the ventilation interface 11 is connected to the ventilation circuit 12 through a ventilation pipe 13. The ventilation circuit 12 is connected to the mounting seat, and by ventilating the ventilation interface 11, the ventilation circuit 12 can be filled with gas, and the gas provides pressure to the mounting seat, so that the pressure sensor to be tested performs pressure detection.

[0027] like Figure 7As shown, a pinhole 31 is provided inside the pin plate 3, wherein the pinhole 31 corresponds to the mounting seat one by one, a PCB board 6 is provided on the top, a probe 32 is provided inside the pinhole 31, one end of the probe 32 is connected to the wiring terminal of the pressure sensor to be tested, and the other end of the probe 32 is connected to the PCB board 6, a connecting wire is provided on the PCB board 6, and the signal of the internal sensor to be tested is led out by the structure of the probe 32 and the PCB board 6. Since the connecting wire on the PCB board 6 is used, the design can be carried out, and the sensors corresponding to each output line correspond one by one. Secondly, the PCB board 6 is a plate-shaped structure, which can avoid opening an output hole on the side of the device, thereby ensuring the sealing of the entire device. Among them, the probe 32 is arranged in the probe 32 sleeve, which can protect the probe 32 and avoid short circuit.

[0028] like Figure 1 As shown, the fixing lock 5 includes a wrench 52 and a knob plunger 51. The bottom of the wrench 52 is hinged to the base 1. A connecting through hole is provided on the wrench 52. The knob plunger 51 is threadedly connected to the connecting through hole. The base 1, the positioning plate 2, the needle plate 3 and the top cover 4 can be compressed by twisting the knob plunger 51. Specifically, the knob plunger 51 abuts against the top cover 4 to provide pressure to the top cover 4 to achieve compression.

[0029] In one embodiment of the utility model, the base 1 and the top cover 4 are both provided with positioning posts, and the positioning plate 2 and the needle plate 3 are provided with corresponding positioning holes, through which the positioning posts pass. The positioning plate 2 and the needle plate 3 are positioned by the positioning posts and the positioning holes to prevent the positioning plate 2 and the needle plate 3 from deviating while being pressed and fixed.

[0030] In one embodiment of the utility model, the top cover 4 is provided with an isolation groove 41, and the isolation groove 41 is directly opposite to the probe 32. The isolation groove 41 is used to prevent the top cover 4 from contacting the welding point of the probe 32 and the PCB board 6, thereby preventing a signal short circuit.

[0031] In one embodiment of the present invention, Figure 5 and Figure 6As shown, the positioning plate 2 includes: a limiting plate 21 and a fixing plate 22, wherein the limiting plate 21 is installed above the fixing plate 22, and a limiting groove 212 is provided on the limiting plate 21, and the limiting grooves 212 are arranged in a row, and a limiting hole 213 is provided in the limiting groove 212, and specifically, a plurality of limiting holes 213 can be provided in each limiting groove 212, and the body of the pressure sensor to be tested is installed in the limiting groove 212, and the pressure detection port of the pressure sensor to be tested is installed in the limiting hole 213, wherein the limiting groove 212 and the limiting hole 213 together constitute a mounting seat. A through hole 221 is provided on the fixing plate 22, and the through hole 221 corresponds to the limiting hole 213 and is connected to the ventilation circuit 12, wherein the pressure detection port of the pressure sensor to be tested can extend into the through hole 221.

[0032] Among them, Figure 6 As shown, the fixing plate 22 is provided with fixing holes 222, the fixing holes 222 are arranged in columns on the fixing plate 22, and the through holes 221 are arranged in rows on the fixing plate 22, the fixing holes 222 and the through holes 221 are arranged alternately, and the fixing holes 222 are used to be fixed to the base 1, thereby ensuring the sealing of the fixing plate 22 and the base 1 to the greatest extent.

[0033] In one embodiment of the present invention, a sealing ring is disposed in the through hole 221. The sealing ring effectively ensures the sealing between the fixing plate 22 and the base 1.

[0034] The use process of the utility model is as follows: insert the pressure detection interface of the pressure sensor to be tested into the limiting hole 213, place the main body of the pressure sensor to be tested in the limiting groove 212, fix the base 1, the fixing plate 22, and the limiting plate 21 in sequence from bottom to top, fix the needle plate 3 above the limiting plate 21, and each probe 32 in the needle plate 3 is respectively connected with each pressure sensor to be tested. Cover the top cover 4 above the needle plate 3, and use the wrench 52 and the knob plunger 51 to achieve the compression and fixation of the device. Connect the ventilation interface 11 with the air source, provide pressurized gas into the device, measure the voltage and current signals of each output line on the PCB board 6, and confirm whether each pressure sensor to be tested is working normally. If there is an abnormal signal on a certain output line, according to the design of the PCB board 6, the abnormal sensor can be quickly located.

[0035] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to examples, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A batch detection device for pressure sensors, characterized in that: include: A base (1), a positioning plate (2), a needle plate (3), a top cover (4) and a fixing lock (5), wherein the positioning plate (2) is mounted on the upper surface of the base (1), the needle plate (3) is mounted on the upper surface of the positioning plate (2), the top cover (4) is mounted on the upper surface of the needle plate (3), and the fixing lock (5) is mounted on both sides of the base (1) and the top cover (4) and is used to press the base (1), the positioning plate (2), the needle plate (3) and the top cover (4); The positioning plate (2) is provided with a mounting seat, the pressure sensor to be tested is mounted in the mounting seat, a ventilation interface (11) is provided on the side of the base (1), a ventilation circuit (12) is provided on the base (1), the ventilation interface (11) is in communication with the ventilation circuit (12), and the ventilation circuit (12) is in communication with the mounting seat; A pinhole (31) is provided inside the pin plate (3), a PCB board (6) is provided on the top, a probe (32) is provided in the pinhole (31), one end of the probe (32) is connected to a wiring terminal of a pressure sensor to be tested, and the other end of the probe (32) is connected to the PCB board (6), and a connecting wire is provided on the PCB board (6).

2. The batch detection device for pressure sensors according to claim 1, characterized in that: The fixing lock (5) comprises a wrench (52) and a knob plunger (51); the bottom of the wrench (52) is hinged to the base (1); a connecting through hole is provided on the wrench (52); and the knob plunger (51) is threadedly connected to the connecting through hole.

3. The batch detection device for pressure sensors according to claim 1, characterized in that: The probe (32) is arranged in a probe (32) sleeve.

4. The batch detection device for pressure sensors according to claim 1, characterized in that: The base (1) and the top cover (4) are both provided with positioning columns, and the positioning plate (2) and the needle plate (3) are provided with corresponding positioning holes, through which the positioning columns pass.

5. The batch detection device for pressure sensors according to claim 1, characterized in that: The top cover (4) is provided with an isolation groove (41), and the isolation groove (41) faces the probe (32).

6. The batch detection device for pressure sensors according to claim 1, characterized in that: The positioning plate (2) comprises: a limiting plate (21) and a fixing plate (22); the limiting plate (21) is mounted above the fixing plate (22); a limiting groove (212) is provided on the limiting plate (21); a limiting hole (213) is provided in the limiting groove (212); a body of the pressure sensor to be tested is mounted in the limiting groove (212); a pressure detection port of the pressure sensor to be tested is mounted in the limiting hole (213); a through hole (221) is provided on the fixing plate (22); the through hole (221) corresponds to the limiting hole (213) and is in communication with the ventilation circuit (12).

7. The batch detection device for pressure sensors according to claim 6, characterized in that: The fixing plate (22) is provided with fixing holes (222), the fixing holes (222) and the through holes (221) are arranged in a staggered manner, and the fixing holes (222) are used to be fixed to the base (1).

8. The batch detection device for pressure sensors according to claim 6, characterized in that: A sealing ring is arranged in the through hole (221).

Images