Sensor quintuplet rapid clamping precision test tool

Abstract

The invention discloses a sensor quintuplet rapid clamping precision test tool, which comprises an air channel, the air channel comprises a shell and a gas distribution pipeline in the shell, and the gas distribution pipeline is provided with a gas inlet interface and a plurality of gas outlets; the quintuplet quick clamp comprises a first clamping shell and a second clamping shell, the first clamping shell and the second clamping shell are folded to form a clamping box, and a cavity is formed in the clamping box to embed the air channel; the PCB is assembled on the top of the bearing plate, a plurality of test areas are arranged on the PCB, and the test areas are in one-to-one correspondence with the windows; and the spring probe is assembled on the test area of the PCB. The beneficial effects of the invention are that according to the technical scheme, five sensors can be tested at the same time through single clamping, and the efficiency is improved by 80%; adaptive extreme working conditions: the design of a heat insulation layer and a sealing ring supports accurate testing in an environment of-40 DEG C to 150 DEG C; zero-damage clamping: a semicircular clamping opening and an engineering plastic material are adopted, so that the surface of the sensor is prevented from being scratched; data reliability: a multi-channel independent gas circuit and a gold-plated probe are adopted, the pressure control error is less than or equal to 0.5%, and the signal distortion rate is lt; and 0.1%.

Description

Technical Field

[0001] The present invention relates to, in particular to, a five-pack quick-clamping precision testing tool for sensors. Background Art

[0002] In the field of industrial automation and precision instruments, stability testing of suspension pressure sensors is crucial, especially in extreme temperature environments (such as -40°C to 150°C). Traditional test fixtures have the following technical bottlenecks:

[0003] Low efficiency of single-point testing: Existing devices can usually only test a single sensor at a time, which cannot meet the batch testing needs of the production line, resulting in long testing cycles and high costs.

[0004] Insufficient clamping reliability: Sensor clamping mostly relies on bolt fixation or simple clips, which is cumbersome to operate and can easily cause sensor displacement or damage due to uneven locking force, affecting data accuracy.

[0005] Significant temperature drift interference: Under extreme temperatures, the gas path structure lacks thermal insulation design, and the ambient temperature easily interferes with the stability of gas pressure, increasing test errors.

[0006] Unstable signal transmission: Ordinary probes are easily oxidized at high temperatures, which increases contact resistance and causes signal distortion, making it difficult to ensure real-time data accuracy.

[0007] The improvement solutions currently attempted by the industry still have flaws:

[0008] Multi-channel gas path parallel design: Although multiple sensors can be tested simultaneously, the gas path crosstalk problem is not solved, and uneven pressure distribution leads to poor data comparability.

[0009] Semi-automatic clamping mechanism: Some tooling uses pneumatic locking, but the structure is complex and relies on external equipment, making it difficult to adapt to the closed environment of high and low temperature test chambers.

[0010] Basic insulation measures: Simply wrapping with insulation materials cannot accurately control the temperature and hinders the sensor installation and removal process.

[0011] Based on the above pain points, there is an urgent need for a five-pack sensor quick clamping accuracy testing fixture. After searching, no technical solution identical to the present invention was found. Summary of the Invention

[0012] The main technical problem solved by the present invention is to provide a five-pack rapid clamping precision testing tool for sensors, which solves one or more of the above-mentioned existing technical problems.

[0013] In order to solve the above technical problems, the present invention adopts a technical solution: a five-pack sensor quick clamping precision test fixture, the innovation of which is:

[0014] The air duct includes a shell and a gas distribution pipeline in the shell. The gas distribution pipeline is provided with an air inlet interface and multiple air outlets. The air inlet interface is located on the side wall of the shell, and the air outlet is located on the top of the shell;

[0015] The five-pack quick clamping device includes a first clamping shell and a second clamping shell, which are folded together to form a clamping box. The clamping box has a cavity inside for embedding the air duct. The top of the clamping box is provided with a clamping opening, which is occupied by the first clamping shell and the second clamping shell respectively. Manual locking mechanisms are provided at both ends of the clamping box to interlock the two clamping shells.

[0016] The carrying plate is located above the clamping box and is fixed to the top of the clamping box through a connecting column; a plurality of windows are provided on the carrying plate, and the windows correspond to the clamping openings one by one;

[0017] A PCB board is mounted on top of the carrier board and has multiple test areas, each corresponding to a window.

[0018] Spring probes are mounted on the test area of ​​the PCB.

[0019] In some embodiments, the manual locking mechanism includes a hook arranged at the end of the first clamping shell, a lock seat arranged at the end of the second clamping shell, a hinged plate arranged on the lock seat, a wrench whose head is hinged to the hinged plate, and a hook arranged in the middle of the wrench and used to hang with the hook.

[0020] In some embodiments, the gas distribution pipeline is a multi-channel structure, and each channel is independently connected to a corresponding gas outlet.

[0021] In some embodiments, the clamping opening is a semicircular groove, which forms a complete circular clamping structure when closed.

[0022] In some embodiments, the connecting post is a threaded post with adjustable height, which is fixed to the top of the clamping box by a nut.

[0023] In some embodiments, the test area of ​​the PCB board is provided with a signal acquisition circuit for transmitting sensor data in real time.

[0024] In some embodiments, the spring probe tip is gold-plated to enhance conductivity and corrosion resistance.

[0025] In some embodiments, a heat insulating layer is provided on the inner wall of the cavity to reduce interference of external temperature on the airway.

[0026] In some embodiments, a sealing ring is provided on the edge of the window of the carrier plate to prevent gas leakage.

[0027] In some embodiments, the air inlet interface uses a quick-connect pneumatic connector to support rapid connection to an external air source.

[0028] The beneficial effects of the present invention are: five-in-one synchronous testing: five sensors can be tested simultaneously in a single clamping, with an efficiency improvement of 80%; adaptation to extreme working conditions: thermal insulation layer + sealing ring design supports precise testing in an environment of -40°C to 150°C; zero-damage clamping: semi-circular clamping mouth + engineering plastic material to avoid scratches on the sensor surface; data reliability: multi-channel independent air path + gold-plated probe, pressure control error ≤0.5%, signal distortion rate <0.1%. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive work, among which:

[0030] Figure 1 It is a structural schematic diagram of a five-pack quick clamping precision testing tool for sensors of the present invention.

[0031] Figure 2 This is a front view of a five-pack quick-clamping precision testing tool for sensors according to the present invention.

[0032] Figure 3 It is a cross-sectional view of a five-pack quick clamping accuracy testing tool for sensors according to the present invention.

[0033] Figure 4 It is a structural schematic diagram of the airway of a five-pack rapid clamping precision testing tool for sensors of the present invention.

[0034] Figure 5 It is a main view of the airway of a five-pack quick clamping precision testing tool for sensors according to the present invention.

[0035] Figure 6 It is a cross-sectional view of the airway of a five-pack quick clamping precision testing tool for sensors according to the present invention.

[0036] Figure 7 It is a structural schematic diagram of a bearing plate of a five-pack rapid clamping precision testing fixture for sensors according to the present invention.

[0037] Figure 8 It is a structural schematic diagram of a PCB board of a five-pack rapid clamping precision testing fixture for sensors according to the present invention.

[0038] Figure 9 It is a side view of a PCB board of a five-pack quick clamping precision testing fixture for sensors according to the present invention. DETAILED DESCRIPTION

[0039] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0040] like Figures 1 to 9 As shown, the embodiment of the present invention includes: the structural embodiment of the sensor five-pack rapid clamping accuracy testing tool is shown below,

[0041] The air channel 100 is composed of a high-strength aluminum alloy shell with an integrated gas distribution pipeline 101. The pipeline adopts a multi-channel independent design. The air inlet interface 102 is located on the side wall of the shell and adopts a quick-connect pneumatic connector. There are 5 air outlets 103, evenly distributed on the top of the shell, with an aperture accuracy of ±0.01mm. The external air source injects gas through the air inlet interface 102, and the gas is diverted to each air outlet 103 through the gas distribution pipeline 101 to ensure that each sensor is subjected to consistent pressure.

[0042] The advantages of Airway 100 are: the multi-channel independent design avoids air path crosstalk and improves pressure control accuracy; the quick-connect connector supports air source connection within 5 seconds, improving efficiency.

[0043] The first clamping shell 201 and the second clamping shell 202 are made of engineering plastic material, and form a clamping box when closed. The size of the internal cavity 203 matches the airway 100; the clamping opening 204 is a semicircular groove, which forms a complete circular structure when closed; the manual locking mechanism at both ends includes a hook 301, a lock seat 302, a hinged plate 303, a wrench 304 and a hook 305.

[0044] The neck of the sensor is inserted into the clamping opening 204, and the wrench 304 is turned to interlock the hook 305 with the hook 301, and the fixation is completed within 5 seconds.

[0045] The advantages of the above structure are: the semicircular groove avoids damaging the sensor housing; the manual locking mechanism does not require tools and is easy to operate.

[0046] The carrier plate 401 is a stainless steel plate, and its bottom is connected to the clamping box via four adjustable threaded columns 402; five windows 403 are opened on the plate, and fluororubber sealing rings are embedded in the edges; the windows 403 are aligned with the clamping opening 204, and the top of the sensor contacts the spring probe 600 through the windows.

[0047] The advantages of the above structure are: the height of the threaded column is adjustable (±5mm) to accommodate sensors of different sizes; the sealing ring prevents leakage of the test gas and ensures the accuracy of environmental simulation.

[0048] The PCB board 500 integrates a signal acquisition circuit, and five sets of spring probes 600 are arranged in the test area, with the needles plated with gold. The spring probes 600 contact the sensor electrodes, collect pressure data in real time, and transmit it to an external analyzer.

[0049] The advantages of the above structure are: the gold-plated needle reduces contact resistance and is resistant to high-temperature corrosion at 200°C; the signal acquisition circuit supports a 0.1ms level response and no data delay; the PCB board 500 and the spring probe 600 are point-to-point contact, eliminating the cumbersome wiring process.

[0050] The inner wall of the cavity 203 is covered with a ceramic fiber insulation layer with a thickness of 2 mm, which isolates the external extreme temperature from interfering with the gas inside the airway 100.

[0051] The advantage of the above structure is that in an environment of -40℃~200℃, the airway temperature fluctuation is ≤±1℃, ensuring the test stability.

[0052] The working principle of this technical solution is as follows:

[0053] Installation phase: insert the five suspended pressure sensors into the air outlet 103 of the airway 100; close the first clamping shell 201 and the second clamping shell 202, and lock the manual mechanism to fix the sensor necks.

[0054] Environmental simulation: The entire device is placed in a high and low temperature test chamber, and an external air source is connected to the air inlet interface 102 .

[0055] Data acquisition: Gas uniformly applies pressure to the sensor, and the spring probe 600 transmits pressure data in real time through the PCB board 500. The analysis system compares the measured value with the preset value and generates a stability report.

[0056] The advantages of this technical solution are:

[0057] Five-sensor simultaneous test: 5 sensors can be tested simultaneously in a single clamping, increasing efficiency by 80%;

[0058] Adaptable to extreme working conditions: thermal insulation layer + sealing ring design supports accurate testing in -40℃~150℃ environment;

[0059] Zero-damage clamping: semicircular clamping mouth + engineering plastic material to avoid scratches on the sensor surface;

[0060] Data reliability: Multi-channel independent gas path + gold-plated probe, pressure control error ≤ 0.5%, signal distortion rate < 0.1%.

[0061] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A five-pack sensor quick clamping precision test fixture, characterized by: include An air channel (100) includes a housing and a gas distribution pipeline (101) in the housing, wherein the gas distribution pipeline (101) is provided with an air inlet interface (102) and a plurality of air outlets (103), wherein the air inlet interface (102) is located on a side wall of the housing, and the air outlets (103) are located on a top of the housing; A five-pack quick clamping device comprises a first clamping shell (201) and a second clamping shell (202), which are folded together to form a clamping box, wherein a cavity (203) is provided in the clamping box for embedding an air duct (100); a clamping opening (204) is provided at the top of the clamping box, wherein the clamping opening (204) is occupied by half each of the first clamping shell (201) and the second clamping shell (202); manual locking mechanisms are provided at both ends of the clamping box to interlock the two clamping shells; A carrying plate (401) is located above the clamping box and is fixed to the top of the clamping box via a connecting column (402); A plurality of windows (403) are provided on the carrier plate (401), and the windows (403) correspond to the clamping openings (204) one by one; A PCB board (500) is mounted on the top of the carrier board (401) and has a plurality of test areas thereon, each corresponding to one of the windows (403); A spring probe (600) is mounted on a test area of ​​a PCB (500).

2. The five-pack sensor quick clamping precision testing fixture according to claim 1, characterized in that: The manual locking mechanism comprises a hook (301) arranged at the end of the first clamping shell (201), a lock seat (302) arranged at the end of the second clamping shell (202), a hinge plate (303) arranged on the lock seat (302), a wrench (304) whose head is hinged to the hinge plate (303), and a hook (305) arranged in the middle of the wrench (304) and used to be hooked with the hook (301).

3. The five-pack sensor quick clamping precision testing fixture according to claim 1, characterized in that: The gas distribution pipeline (101) is a multi-channel structure, and each channel is independently connected to a corresponding gas outlet (103).

4. The five-pack sensor quick clamping precision testing fixture according to claim 1, characterized in that: The clamping opening (204) is a semicircular groove, which forms a complete circular clamping structure when closed.

5. The five-pack sensor quick clamping precision testing fixture according to claim 1 is characterized by: The connecting column (402) is a threaded column with adjustable height, fixed to the top of the clamping box by a nut.

6. The five-pack sensor quick clamping precision testing fixture according to claim 1, characterized in that: The test area of ​​the PCB board (500) is provided with a signal acquisition circuit for transmitting sensor data in real time.

7. The five-pack sensor quick clamping precision testing fixture according to claim 1, characterized in that: The needle tip of the spring probe (600) is made of gold-plated material to enhance electrical conductivity and corrosion resistance.

8. The five-pack sensor quick clamping precision testing fixture according to claim 1, characterized in that: The inner wall of the cavity (203) is provided with a heat insulation layer to reduce the interference of the external temperature on the airway (100).

9. The five-pack sensor quick clamping precision testing fixture according to claim 1, characterized in that: A sealing ring is provided at the edge of the window (403) of the supporting plate (401) to prevent gas leakage.

10. The five-pack sensor quick clamping precision testing fixture according to claim 1, characterized in that: The air inlet interface (102) adopts a quick-connect pneumatic connector, which supports rapid connection to an external air source.

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