Medium volatilization test fixture

Abstract

The utility model relates to a medium volatilization test fixture which is applied to the field of sensor testing and comprises a medium seat, a placement plate is arranged on the medium seat, a medium groove is formed in the surface, facing the placement plate, of the medium seat, a medium is located in the medium groove, a placement groove is formed in the placement plate, and a sensor is placed in the placement groove. A first vent hole communicated with the medium groove is formed in the groove bottom of the containing groove, and a detection unit used for outputting a sensor signal is arranged on the medium base. The device has the technical effects that when the influence degree of medium volatilization on the precision of the sensor needs to be tested, an operator places a volatilizable medium in the medium groove, and gas volatilized by the medium is in long-term contact with the sensor through the first vent hole; the output signal of the sensor is transmitted to the jig external equipment through the detection unit to analyze the precision of the sensor, so that an operator can conveniently know whether the output signal of the sensor is influenced by medium volatilization or not and the influence degree of different media on the precision of the sensor.

Description

Technical Field

[0001] The present application relates to the field of sensor testing technology, and in particular to a medium volatilization testing fixture. Background Art

[0002] A sensor is a detection device that can sense the information being measured and convert the sensed information into electrical signals or other required forms of information output according to certain rules to meet the requirements of information transmission, processing, storage, display, recording and control. The accuracy of the sensor determines the deviation between its output signal and the true value of the measurement. The higher the accuracy, the higher the accuracy and reliability of the measurement data.

[0003] During the actual signal detection process of existing sensors, there are a large number of volatile media, such as oil and gas, in the working environment of the sensors.

[0004] When the above-mentioned sensor is performing signal detection, it is difficult for the operator to know whether the output signal of the sensor is affected by the volatilization of the medium under the volatilization state of the medium, and the degree of influence of different media on the accuracy of the sensor. Summary of the invention

[0005] In order to test the effect of medium volatilization on sensor accuracy, the present application provides a medium volatilization test fixture, which adopts the following technical solution: it includes a medium seat, a placement plate is provided on the medium seat, a medium groove is provided on the surface of the medium seat facing the placement plate, the medium is located in the medium groove, a placement groove is provided on the placement plate, the sensor is placed in the placement groove, a first ventilation hole communicated with the medium groove is provided at the bottom of the placement groove, and a detection unit for outputting sensor signals is provided on the medium seat.

[0006] Through the above technical solution, when it is necessary to test the influence of medium volatilization on the accuracy of the sensor, the operator places the volatile medium in the medium slot, and the volatilized gas of the medium is in long-term contact with the sensor through the first vent hole. The output signal of the sensor is transmitted to the external equipment of the fixture through the detection unit to analyze the accuracy of the sensor, so that the operator can know whether the output signal of the sensor is affected by the volatilization of the medium and the influence of different media on the accuracy of the sensor.

[0007] In a specific possible implementation scheme, the detection unit includes a PCB board mounted on the medium seat and matching the medium seat, a second air vent connected to the medium groove is opened on the PCB board, the second air vent is connected to the first air vent, and a plurality of detection probes are arranged on the PCB board, and the plurality of detection probes are connected to the sensor after passing through a placement plate at one end facing the sensor.

[0008] Through the above technical solution, the operator places the volatile medium in the medium slot, and the volatilized gas of the medium passes through the second vent and the first vent in turn and comes into long-term contact with the sensor. After the detection probe transmits the sensor data to the PCB board, the PCB board transmits the data to the external equipment of the fixture to analyze the sensor accuracy, so that the operator can know whether the output signal of the sensor is affected by the volatilization of the medium and the degree of influence of different media on the sensor accuracy.

[0009] In a specific implementation scheme, a mounting groove is provided on the medium seat, a threaded pin matching the mounting groove is provided in the mounting groove, a positioning hole matching the threaded pin is provided on the PCB board, and the threaded pin is partially inserted into the positioning hole.

[0010] Through the above technical solution, the medium seat and the PCB board are quickly connected through the cylindrical part of the threaded pin. The threaded pin limits the position of the PCB board, reducing the possibility of position deviation of the PCB board and making it easier for operators to load and unload the PCB board from the medium seat, saving time and effort.

[0011] In a specific possible implementation manner, a pressing plate matching the placing plate is provided on the placing plate, and the placing groove is covered by the pressing plate.

[0012] Through the above technical solution, the pressure plate reduces the possibility of the sensor detaching from the placement groove, improves the stability of the sensor placement, reduces the possibility of external impurities entering the placement groove, and reduces the impact of external factors on the sensor accuracy detection.

[0013] In a specific implementation manner, the pressing plate is made of 65Mn material.

[0014] In a specific possible implementation scheme, a plurality of magnetic suction grooves are provided on the surface of the placement plate facing the pressure plate, and magnetic suction blocks are provided in a plurality of the magnetic suction grooves, and a plurality of the magnetic suction blocks are mutually adsorbed with the pressure plate.

[0015] Through the above technical solution, the magnetic adsorption of the magnetic block and the pressure plate is utilized to improve the stability of the connection between the pressure plate and the placement plate, while making it easy for the operator to easily and conveniently disassemble the pressure plate and pick up the sensor.

[0016] In a specific possible implementation mode, an annular guide groove is respectively formed at the notch of a plurality of the magnetic suction grooves.

[0017] Through the above technical solution, the magnetic block enters the magnetic groove along the guide groove, which is convenient for the operator to install the magnetic block in the magnetic groove, thereby improving the convenience of installation.

[0018] In a specific possible implementation manner, a taking groove is provided on the groove wall of the placement groove.

[0019] Through the above technical solution, the operator can take and place the sensor from the placement slot through the taking slot, which is convenient for subsequent replacement of sensors of different models for testing.

[0020] In a specific possible implementation manner, the placement plate is made of flame-resistant material.

[0021] In a specific possible implementation manner, the medium seat is made of flame-resistant material.

[0022] In summary, the present application has the following beneficial technical effects: when it is necessary to test the degree of influence of medium volatilization on sensor accuracy, the operator places the volatile medium in the medium slot, and the volatilized gas of the medium is in long-term contact with the sensor through the first vent hole. The output signal of the sensor is transmitted to the external equipment of the fixture through the detection unit to analyze the sensor accuracy, so that the operator can know the degree of influence of different media on the sensor accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0024] Figure 2 It is an exploded schematic diagram used to illustrate the placement slot in the embodiment of the present application.

[0025] Figure numerals: 1. medium seat; 2. placement plate; 3. medium slot; 4. placement slot; 5. sensor; 6. first vent hole; 7. PCB board; 8. second vent hole; 9. detection probe; 10. mounting slot; 11. threaded pin; 12. positioning hole; 13. pressure plate; 14. magnetic slot; 15. magnetic block; 16. guide slot; 17. taking slot. DETAILED DESCRIPTION

[0026] The following is combined with Figure 1-2 This application is described in further detail.

[0027] The embodiment of the present application discloses a medium volatilization test fixture.

[0028] Reference Figure 1 and Figure 2 The dielectric volatilization test fixture includes a dielectric seat 1, on which a placement plate 2 is arranged. In the embodiment of the present application, the dielectric seat 1 and the placement plate 2 are both made of flame-retardant materials that meet the FR-4 grade. The FR-4 board has good electrical insulation, high heat resistance, good processing performance, high mechanical strength, good chemical resistance stability, low moisture absorption, good flame retardancy, etc. It can be made of epoxy resin or glass fiber material. In the embodiment of the present application, a 3240 epoxy board laminated glass cloth board is used.

[0029] Reference Figure 1 and Figure 2 A medium slot 3 is provided on the surface of the medium seat 1 facing the placement plate 2. The medium is located in the medium slot 3. In the embodiment of the present application, the medium can be liquid oil or solid dry ice. Four arc chamfers are provided on the slot wall of the medium slot 3, which reduces the possibility of the medium being piled up in the medium slot 3 and facilitates the subsequent cleaning of the medium. A placement slot 4 is provided on the placement plate 2. Four circular picking slots 17 are provided on the slot wall of the placement slot 4. The four picking slots 17 are evenly distributed on the slot wall of the placement slot 4. The sensor 5 is placed in the placement slot 4. The operator can take and place the sensor 5 from the placement slot 4 through the picking slots 17, which facilitates the subsequent replacement of sensors 5 of different models for detection. A first vent 6 is provided at the center of the slot bottom of the placement slot 4, which is connected to the medium slot 3. A detection unit for outputting the sensor 5 signal is provided on the medium seat 1.

[0030] Reference Figure 1 and Figure 2 The detection unit includes a PCB board 7 mounted on the medium seat 1 and matching the size of the medium seat 1. The PCB board 7 is provided with a second vent hole 8 communicating with the medium slot 3, and the second vent hole 8 is connected with the first vent hole 6. Four detection probes 9 are arranged on the PCB board 7. The ends of the four detection probes 9 facing the sensor 5 are respectively passed through the placement plate 2 and connected with the pads of the sensor 5. Two mounting grooves 10 are provided on the medium seat 1. The mounting grooves 10 are threadedly connected with threaded pins 11 matching the size of the mounting grooves 10. The PCB board 7 is provided with a positioning hole 12 matching the size of the threaded pin 11. The threaded pin 11 is partially inserted in the positioning hole 12. The cylindrical part of the threaded pin 11 is used to realize the quick connection between the medium seat 1 and the PCB board 7. The threaded pin 11 plays a limiting role on the position of the PCB board 7, which reduces the possibility of the position deviation of the PCB board 7 and facilitates the operator to load and unload the PCB board 7 from the medium seat 1, saving time and effort.

[0031] Therefore, when it is necessary to test the influence of medium volatilization on the accuracy of sensor 5, the volatilized gas of the medium passes through the second vent 8 and the first vent 6 in turn and comes into long-term contact with sensor 5. After the detection probe 9 transmits the data of sensor 5 to PCB board 7, PCB board 7 transmits the data to the external equipment of the fixture to analyze the accuracy of sensor 5, so as to facilitate the operator to know whether the output signal of sensor 5 is affected by the volatilization of the medium and the influence of different media on the accuracy of sensor 5.

[0032] Reference Figure 1 and Figure 2A pressing plate 13 matching the size of the placing plate 2 is mounted on the placing plate 2, and the placing groove 4 is covered by the pressing plate 13. In the embodiment of the present application, the size of the pressing plate 13 is slightly larger than the size of the placing plate 2. The pressing plate 13 reduces the possibility of the sensor 5 escaping from the placing groove 4, improves the stability of the placement of the sensor 5, and reduces the possibility of external impurities entering the placing groove 4, thereby reducing the influence of external factors on the precision detection of the sensor 5. In the embodiment of the present application, the pressing plate 13 is made of 65Mn material, which has the advantages of strong processing performance, high wear resistance, strong impact resistance, and high cost performance.

[0033] Reference Figure 1 and Figure 2 , the surface of the placement plate 2 facing the pressing plate 13 is provided with eight circular magnetic grooves 14 arranged in an array. In the embodiment of the present application, magnetic blocks 15 are provided in the four magnetic grooves 14, and the number and position of the magnetic blocks 15 can be adjusted according to actual conditions. The four magnetic blocks 15 are mutually adsorbed with the pressing plate 13. The notches of the eight magnetic grooves 14 are respectively provided with annular guide grooves 16. The magnetic blocks 15 enter the magnetic grooves 14 along the guide grooves 16, which is convenient for operators to install the magnetic blocks 15 in the magnetic grooves 14, thereby improving the convenience of installation. Therefore, the magnetic adsorption of the magnetic blocks 15 and the pressing plate 13 improves the stability of the connection between the pressing plate 13 and the placement plate 2, and at the same time facilitates operators to easily and conveniently disassemble the pressing plate 13 and replace sensors 5 of different models for detection.

[0034] The implementation principle of the embodiment of the present application is: when it is necessary to test the degree of influence of medium volatilization on the accuracy of sensor 5, the volatilized gas of the medium passes through the second vent 8 and the first vent 6 in sequence and then contacts with sensor 5 for a long time. After the detection probe 9 transmits the data of sensor 5 to PCB board 7, PCB board 7 transmits the data to the external equipment of the fixture to analyze the accuracy of sensor 5, so as to facilitate the operator to know whether the output signal of sensor 5 is affected by the volatilization of the medium, and the degree of influence of different media on the accuracy of sensor 5.

[0035] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A medium volatilization test fixture, characterized by: The invention comprises a medium seat (1), wherein a placement plate (2) is provided on the medium seat (1), a medium groove (3) is provided on the surface of the medium seat (1) facing the placement plate (2), a medium is located in the medium groove (3), a placement groove (4) is provided on the placement plate (2), a sensor (5) is placed in the placement groove (4), a first vent hole (6) communicating with the medium groove (3) is provided at the bottom of the placement groove (4), and a detection unit for outputting a sensor (5) signal is provided on the medium seat (1).

2. The medium volatilization test fixture according to claim 1, characterized in that: The detection unit comprises a PCB board (7) mounted on the medium seat (1) and matched with the medium seat (1); a second vent hole (8) communicating with the medium slot (3) is provided on the PCB board (7); the second vent hole (8) is connected with the first vent hole (6); a plurality of detection probes (9) are provided on the PCB board (7); one end of the plurality of detection probes (9) facing the sensor (5) passes through the placement plate (2) and is connected to the sensor (5).

3. The medium volatilization test fixture according to claim 2, characterized in that: The medium seat (1) is provided with a mounting groove (10), a threaded pin (11) matching the mounting groove (10) is provided in the mounting groove (10), a positioning hole (12) matching the threaded pin (11) is provided on the PCB board (7), and the threaded pin (11) is partially inserted into the positioning hole (12).

4. The medium volatilization test fixture according to claim 1, characterized in that: The placement plate (2) is provided with a pressing plate (13) matching the placement plate (2), and the placement groove (4) is covered by the pressing plate (13).

5. The medium volatilization test fixture according to claim 4, characterized in that: The pressing plate (13) is made of 65Mn material.

6. The medium volatilization test fixture according to claim 5, characterized in that: A plurality of magnetic suction grooves (14) are provided on the surface of the placement plate (2) facing the pressing plate (13), and a plurality of magnetic suction grooves (14) are provided with magnetic suction blocks (15), and the plurality of magnetic suction blocks (15) are mutually adsorbed with the pressing plate (13).

7. The medium volatilization test fixture according to claim 6, characterized in that: Annular guide grooves (16) are respectively provided at the notch openings of the plurality of magnetic attraction grooves (14).

8. The medium volatilization test fixture according to claim 1, characterized in that: A taking groove (17) is provided on the groove wall of the placement groove (4).

9. The medium volatilization test fixture according to claim 1, characterized in that: The placement plate (2) is made of flame-resistant material.

10. The medium volatilization test fixture according to claim 1, characterized in that: The medium seat (1) is made of flame-resistant material.

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