Detection tool for pressure sensor

Abstract

The utility model discloses a detection tool for a pressure sensor, and relates to the technical field of product detection, the detection tool comprises a lower die arranged on a lower die holder and an upper die arranged at an upper die holder, the upper die can move close to or away from the lower die, the lower die is provided with a first blind hole for a pressure interface to insert, and the upper die is provided with a second blind hole for a pressure interface to insert. And the upper die is provided with a second blind hole for accommodating the switching part and the cable plug, so that the switching part blocks the first blind hole and the lower die blocks the second blind hole when the upper die moves towards the lower die until the upper die and the lower die are in a die assembly state. According to the utility model, through the arrangement of the upper die and the lower die, after a pressure sensor to be detected is placed on the lower die, the upper die and the lower die are in a die assembly state, at the moment, the pressure interface is placed in the formed inflatable closed chamber, the switching part and the cable plug are placed in the formed detection closed chamber, and then gas is introduced into the inflatable closed chamber, so that the pressure sensor is detected. The detection work can be completed by checking whether the gas exists in the closed chamber or not.

Description

Technical Field

[0001] The utility model relates to the technical field of product detection, in particular to a detection tool for a pressure sensor. Background Art

[0002] A pressure sensor is a device or component that senses pressure signals and converts them into a usable electrical output signal according to certain rules. Pressure sensors typically consist of a pressure-sensitive element and a signal processing unit. Depending on the test pressure type, pressure sensors can be divided into gauge pressure sensors, differential pressure sensors, and absolute pressure sensors.

[0003] Figure 1 FIG. 1 shows a schematic diagram of the three-dimensional structure of a certain type of pressure sensor in the prior art. Figure 2 for Figure 1 In the cross-sectional structural diagram, 102 represents the pressure interface of the pressure sensor, 103 represents the cable plug of the pressure sensor, and 101 represents the adapter part of the pressure sensor. The adapter part is formed by the sealed connection between the pressure interface and the cable plug, and a cavity for storing circuit boards, chips, etc. is provided inside the adapter part. When in use, the external fluid medium flows into the cavity through the pressure interface and acts on the chip, etc. The cable plug is used to be plugged into the power supply to supply power to the chip, etc. During the production process of the pressure sensor, the sealing of the cavity of the adapter part is generally tested to prevent the fluid medium from entering the cavity when the pressure sensor is used, which causes inaccurate measured results.

[0004] After searching, the patent document with authorization announcement number CN216669115U discloses: a pressure sensor detection device, which includes a body, an air compressor, an air tank and a standard sensor, and also includes a chassis, the top of the chassis is fixed to the body, the interior of the chassis is provided with an air tank extending to the top of the chassis, the top of the air tank is embedded with a standard sensor, the air compressor is fixed to the chassis and the output end is connected to the air tank, the outside of the air tank is provided with an exhaust pipe extending to the outside of the chassis, the outside of the exhaust pipe is provided with a control valve, the top of the chassis is provided with a clamping mechanism fixed to the right side of the body, the top of the air tank is embedded with a mounting seat located below the clamping mechanism, the top of the body is fixed with an oscilloscope, and the bottom of the inner wall of the air tank is fixed with an acoustic emission transducer.

[0005] The above-mentioned detection device is achieved by pre-setting a standard pressure sensor on the body, then setting the pressure sensor to be tested on the body, and then simultaneously passing air of the same pressure into the pressure interfaces of the two and observing and comparing the readings of the two on the body. Based on the readings of the standard pressure sensor, it is judged whether the pressure sensor to be tested is qualified.

[0006] However, during long-term testing, the standard pressure sensor will be damaged under multiple intermittent high-pressure conditions. If this is not discovered in time, the pressure sensor that has passed the test by comparison will have major flaws, resulting in an increased defective rate. If the standard pressure sensor is replaced periodically, the testing cost will increase.

[0007] Based on this, we propose a detection tooling for pressure sensors to solve the above problems. Utility Model Content

[0008] The purpose of the present utility model is to solve the problems in the prior art and to propose a detection tool for a pressure sensor. When the pressure sensor to be tested is placed on the detection tool, the pressure sensor and the detection tool are sealed and matched so that the pressure interface is placed in the formed inflatable closed chamber, and the adapter and the cable plug are placed in the formed detection closed chamber. Subsequently, gas is introduced into the inflatable closed chamber to see whether the gas is present in the detection closed chamber, and the detection work can be completed.

[0009] In order to solve the above problems, the present invention provides the following technical solutions:

[0010] A detection tooling for a pressure sensor comprises a lower die arranged on a lower die base and an upper die arranged on an upper die base, and the upper die can move toward or away from the lower die, the lower die is provided with a first blind hole for inserting a pressure interface, the upper die is provided with a second blind hole for accommodating an adapter and a cable plug, so that when the upper die moves toward the lower die until the two are in a mold-closed state, the adapter blocks the first blind hole and the lower die blocks the second blind hole, and the first blind hole and the second blind hole respectively constitute an airtight chamber and a detection closed chamber.

[0011] As a further solution of the present invention: the inner side wall of the second blind hole is provided with a hole shoulder, so that when the upper die moves toward the lower die, the hole shoulder can apply a force along the axis direction of the second blind hole to the adapter.

[0012] As a further solution of the present invention: a receiving groove is opened on the lower mold at the outer position of the first blind hole, and sealing rings are provided at the port position of the receiving groove and the first blind hole. The adapter part and the lower mold can respectively abut the corresponding sealing rings to achieve sealing of the first blind hole and the second blind hole.

[0013] As a further solution of the present invention: a first through hole is provided on the lower mold, and a connecting head is sealed at one end of the first through hole to form the first blind hole, a first connecting hole connected to the first blind hole is provided on the connecting head, and the first connecting hole can be opened and closed.

[0014] As a further solution of the present invention: a groove for receiving the end of the pressure interface is provided on the connecting head, so that the pressure interface and the first connecting hole are coaxially arranged.

[0015] As a further solution of the present invention: a second connecting hole connected to the second blind hole is opened on the upper mold, and the second connecting hole can be opened and closed.

[0016] As a further solution of the present invention: the detection tooling also includes a cabinet, the upper die base and the lower die base are respectively arranged at the top and bottom of the cabinet, and a driving member is provided on the cabinet for driving the upper die base to move closer to or away from the lower die.

[0017] As a further solution of the present invention: the inspection tool also includes a marking assembly, which includes a power source fixedly set on the cabinet and a benchmark rod movably set on the lower mold base, and the benchmark rod is located on the motion path of the execution end of the power source along its length direction, the benchmark rod and the adapter are arranged opposite to each other, and the lower mold base is provided with a reset spring fixedly connected to the benchmark rod.

[0018] As a further solution of the present invention: the detection tool also includes a blowing component, and the blowing component includes fans relatively arranged on both sides of the cabinet.

[0019] As a further solution of the present invention: a photoelectric switch sensor is provided on the lower die base, and the emitting end of the photoelectric switch sensor faces the lower die base.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. By setting up the upper and lower molds, after the pressure sensor to be tested is placed on the lower mold, the upper and lower molds are in a closed mold state. In this closed mold state, the pressure interface is placed in the formed airtight chamber, and the adapter and cable plug are placed in the formed detection closed chamber. Subsequently, gas is introduced into the airtight chamber to check whether the gas is in the detection closed chamber, and the detection work is completed. Compared with the detection method of the prior art that uses a standard pressure sensor for comparison, the present invention does not require a standard pressure sensor for comparison, and the detection method can be adapted to different types of pressure sensors.

[0022] 2. Through the arrangement of the first connecting hole and the second connecting hole, two external hose connectors can be connected to the first connecting hole and the second connecting hole respectively, that is, the two hose connectors are connected to the inflation closed chamber and the detection closed chamber respectively, making detection more convenient;

[0023] 3. Through the setting of the marking component, after the pressure sensor is tested and qualified, the surface of the pressure sensor can be marked using the marking rod in the marking component to achieve integrated detection and marking;

[0024] 4. By setting up the blowing assembly, when the sealing of the airtight chamber and the detection chamber is broken and the gas inside the airtight chamber accumulates inside the cabinet, the blowing assembly can be used to quickly dissipate the gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of a pressure sensor in the prior art;

[0027] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure;

[0028] Figure 3 It is a schematic diagram of the three-dimensional structure of the utility model;

[0029] Figure 4 is Figure 3 Schematic diagram of the three-dimensional structure of the protective door in the state;

[0030] Figure 5 It is a schematic diagram of the three-dimensional structure of the upper mold and the lower mold in the utility model;

[0031] Figure 6 This is a schematic diagram of the three-dimensional structure of the lower die and the lower die base in the utility model;

[0032] Figure 7 This is a schematic diagram of the three-dimensional structure of the pressure seat in the utility model;

[0033] Figure 8 This is a schematic diagram of the cross-sectional structure of the upper mold and the lower mold in the utility model;

[0034] Figure 9 This is a schematic diagram of the cross-sectional structure of the upper mold in the utility model;

[0035] Figure 10 This is a schematic diagram of the cross-sectional structure of the lower die and the pressure sensor in the present utility model;

[0036] Figure 11 This is a schematic diagram of the cross-sectional structure of the lower die and the lower die base in the utility model. Figure 1 ;

[0037] Figure 12 yes Figure 11 A schematic cross-sectional view of a structure in which a pressure sensor is removed;

[0038] Figure 13 This is a schematic diagram of the cross-sectional structure of the lower die and the lower die base in the utility model. Figure 2 ;

[0039] Figure 14 This is a schematic diagram of the cross-sectional structure of the marking component and the lower die base in the utility model;

[0040] Figure 15 It is a schematic cross-sectional view of the utility model in the mold closing state;

[0041] Figure 16 This is a schematic diagram of the cross-sectional structure of the upper die base in the utility model;

[0042] Figure 17 It is a schematic diagram of the cross-sectional structure of the upper die base and the upper die in the utility model.

[0043] In the figure: 1. Lower die base; 2. Lower die; 3. Upper die base; 4. Upper die; 5. First blind hole; 6. Second blind hole; 7. Hole shoulder; 8. Receiving groove; 9. Assembly hole; 10. Connector; 11. First connecting hole; 12. Groove; 13. Second connecting hole; 14. Cabinet; 15. Drive part; 16. Marking component; 1601. Power source; 1602. Marking rod; 1603. Return spring; 17. Fan; 18. Photoelectric switch sensor; 19. Press seat; 20. Knob; 21. Locating pin; 22. Protective door; 23. Cylinder; 24. Avoidance area; 25. Through hole; 26. Working hole; 27. Slot; 28. Slot hole. DETAILED DESCRIPTION

[0044] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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.

[0045] Example 1:

[0046] like Figure 3-Figure 15 As shown, a detection tool for a pressure sensor includes a cabinet 14, an upper mold base 3 is movably provided on the top of the cabinet 14, a lower mold base 1 is fixedly provided on the bottom of the cabinet 14, and an upper mold 4 is provided on the upper mold base 3, and a lower mold 2 is provided on the lower mold base 1. A driving member 15 is also provided on the top of the cabinet 14, and the execution end of the driving member 15 is fixedly connected to the upper mold base 3, so that the driving member 15 can drive the upper mold 4 to approach the lower mold 2 below until the upper mold 3 and the lower mold 2 are in a closed mold state.

[0047] The lower die 2 is provided with a first blind hole 5, and the opening of the first blind hole 5 faces upwards. The upper die 4 is provided with a second blind hole 6, and the opening of the second blind hole 6 faces downwards. The lower die 2 is provided with a receiving groove 8 at the outer position of the first blind hole 5, and sealing rings are provided at the end positions of the receiving groove 8 and the first blind hole 5. Before testing, the upper die 4 is located above the lower die 2, and the upper die 4 and the lower die 2 are in the open state. This state can be determined by the Figure 3 、 Figure 5 and Figure 8 To represent, during the test, first insert the pressure interface 102 of the pressure sensor to be tested into the first blind hole 5, and then use the driving member 15 to drive the upper mold base 3 and the upper mold 4 to move downward until the second blind hole 6 is sleeved on the cable plug 103 of the pressure sensor and the adapter 101, and then drive the upper mold 4 downward. In this process, since the hole shoulder 7 is provided on the inner side wall of the second blind hole 6, the hole shoulder 7 inside the second blind hole 6 can apply a downward pressing force to the cable plug 103 during the downward process of the second blind hole 6, thereby making the bottom of the adapter 101 and the opening of the first blind hole 5 aligned. The sealing ring of the upper mold 4 contacts with the sealing ring, so that the first blind hole 5 is blocked and sealed; at the same time, the downward movement of the upper mold 4 will drive the open end of the second blind hole 6 to press the sealing ring in the accommodating groove 8. When the upper mold 4 moves to the specified position and is in the mold closing state with the lower mold 2, the adapter 101 will block and seal the first blind hole 5, and the accommodating groove 8 will block and seal the second blind hole 6, that is, the pressure interface 102 of the pressure sensor is located in the airtight chamber formed by the first blind hole 5, and the adapter 101 of the pressure sensor and the cable plug 103 are both located in the detection closed chamber formed by the second blind hole 6. This state can be determined by Figure 15 To indicate this, it is only necessary to introduce a certain pressure of gas into the airtight chamber and then check whether the gas is present inside the airtight chamber to determine whether the pressure sensor is qualified. Specifically, if no gas is detected inside the airtight chamber, it means that the cavity seal of the adapter 101 is intact and the pressure sensor is qualified. Otherwise, it means that the cavity seal of the adapter 101 does not meet the standard and the pressure sensor is defective.

[0048] In summary, the utility model provides a first blind hole 5 for inserting the pressure interface 102 on the lower mold 2, and provides a second blind hole 6 for accommodating the adapter part 101 and the cable plug 103 on the upper mold 4. When the upper mold 4 and the lower mold 2 are in the mold closing state, the pressure interface 102 will be sealed in the first blind hole 5, and the adapter part 101 and the cable plug 103 will be sealed in the second blind hole 6, so that subsequent detection work can be conveniently implemented, the detection is simple, and the detection is accurate.

[0049] like Figures 8-11As shown, in order to facilitate the detection of the gas in the airtight chamber and the detection of the gas in the airtight chamber, a first through hole is provided on the lower mold 2, and a connecting head 10 is sealed at the bottom end of the first through hole to form the above-mentioned first blind hole 5, and a first connecting hole 11 connected to the first blind hole 5 is provided on the connecting head 10, and the first connecting hole 11 can be opened and closed, that is, a valve can be provided on the first connecting hole 11; a second connecting hole 13 connected to the second blind hole 6 is provided on the upper mold 4, and the second connecting hole 13 can be opened and closed, that is, a valve can be provided on the second connecting hole 13. Through the setting of the first connecting hole 11 and the second connecting hole 13, two external hose connectors can be connected to the first connecting hole 11 and the second connecting hole 13 respectively, that is, the two hose connectors are connected to the airtight chamber and the detection closed chamber respectively. During subsequent testing, the two hose connectors can be connected to the corresponding components (air compressor, etc.) first, so that the valve on the second connecting hole 13 is in a closed state, and then the detection closed chamber is evacuated to make the valve on the first connecting hole 11 in an open state, and then a certain pressure of gas (helium or nitrogen, etc.) is introduced into the airtight chamber. By observing whether the gas is generated inside the detection closed chamber, the quality of the pressure sensor to be tested can be judged.

[0050] On the basis of setting the connecting head 10, a groove 12 for receiving the end of the pressure interface 102 is opened on the connecting head 10, so that the pressure interface 102 is coaxially arranged with the first connecting hole 11, so as to facilitate better gas supply to the pressure interface 102 through the first connecting hole 11.

[0051] like Figure 14 As shown, further, after the pressure sensor is tested and qualified, it needs to be marked. The utility model is provided with a marking component 16 on the cabinet 14. The marking component 16 includes a power source 1601 fixedly provided on the cabinet 14 and a mark rod 1602 movably provided on the lower mold base 1, and the mark rod 1602 is located along its length direction on the execution end movement path of the power source 1601. The mark rod 1602 is arranged opposite to the adapter 101, and the lower mold base 1 is provided with a reset spring 1603 fixedly connected to the mark rod 1602. After the pressure sensor is tested and qualified, the power source 1601 can be used to drive the marker 1602 to move, so that the marker 1602 instantly contacts the surface of the pressure sensor to achieve marking; in this process, the reset spring 1603 will be compressed as the marker 1602 moves toward the pressure sensor. Subsequently, after the power source 1601 is reset, the reset spring 1603 will apply a certain elastic reset force to the marker 1602, so that the marker 1602 is reset, facilitating the next work.

[0052] It should be noted that the above-mentioned middle driving member 15 and power source 1601 can be set as a cylinder, an oil cylinder, a telescopic rod, etc., and this article does not impose any restrictions on this, as long as it can realize the reciprocating movement of the corresponding components.

[0053] like Figure 3-Figure 4 As shown, after the detection is completed, the upper mold 4 is reset, and the sealing of the airtight chamber and the detection airtight chamber is broken, and the gas inside the airtight chamber will accumulate inside the cabinet 14. In order to quickly dissipate the gas, the utility model also includes a blowing assembly, which includes fans 17 relatively arranged on both sides of the cabinet 14. The convection generated by the fans 17 on both sides can quickly discharge the gas from the cabinet 14.

[0054] like Figure 4 As shown, further, in order to ensure safety during the detection process, a protective component is also provided on the cabinet 14, which includes a cylinder 23 provided on the top of the cabinet 14 and a protective door 22 connected to the piston rod of the cylinder 23. During the pressure sensor detection process, the cylinder 23 will drive the protective door 22 downward to close the cabinet 14 to prevent staff from operating it incorrectly.

[0055] Example 2:

[0056] like Figures 8-12 and Figure 16-17 As shown, the difference between this embodiment and the first embodiment is that the upper mold 4 and the lower mold 2 are detachably mounted on the upper mold base 3 and the lower mold base 1 respectively. The detachable mounting of the two allows for quick replacement of the upper mold 4 and the lower mold 2, facilitating the detection of different types of pressure sensors. Specifically, the detachable mounting of the upper mold 4 and the lower mold 2 is designed as follows:

[0057] (1) Upper die 4, the upper die base 3 is provided with a slot 27 for inserting the upper die 4 at one end facing the lower die 2, and a positioning pin 21 is movably inserted on the upper die base 3, and one end of the positioning pin 21 passes through the slot 27. The upper die base 3 is provided with a connecting spring (not shown in the figure) fixedly connected to the positioning pin 21, so that the positioning pin 21 can automatically reset after being pulled outward for a distance on the upper die base 3; the side of the upper die 4 is provided with an assembly hole 9. After the upper die 4 is inserted into the assembly hole 9 from bottom to top, under the action of the connecting spring, the positioning pin 21 always contacts the side of the upper die 4, and the positioning pin 21 has a movement tendency to move toward the upper die 4. At this time, the upper die 4 can be rotated until one end of the positioning pin 21 is inserted into the assembly hole 9, completing the assembly of the upper die 4 and the upper die base 3. Subsequently, it is only necessary to pull the positioning pin 21 outward so that the positioning pin 21 is away from the assembly hole 9 to release the lock of the positioning pin 21 and realize the disassembly of the upper die 4 and the upper die base 3.

[0058] (2) Lower die 2: A slot 28 for inserting the lower die 2 is provided on the side of the lower die base 1 facing the upper die 4. At the same time, a pressure seat 19 is detachably mounted on the lower die base 1 via a knob 20. A plurality of protrusions are provided on one side of the pressure seat 19 along its length, and an escape zone 24 is formed between any two adjacent protrusions. When the pressure seat 19 is mounted on the lower die base 1 using the knob 20, the pressure seat 19 presses a portion of the lower die 2 onto the slot 28, and the other portion of the lower die 2 is located within the escape zone 24. By providing a plurality of escape zones 24 on the pressure seat 19, a single pressure seat 19 can simultaneously press a plurality of lower dies 2 while also allowing them to escape. Furthermore, the pressure seat 19 and the lower die base 1 can be disassembled and assembled by turning the knob 20, making it easy to use.

[0059] like Figure 7 As shown, in order to sense whether a pressure sensor to be detected is placed on the lower mold 2, a photoelectric switch sensor 18 can be provided on the pressure seat 19 on the basis of the above-mentioned pressure seat 19, and a working hole 26 for the emission end of the photoelectric switch sensor 18 to emit light is opened on the pressure seat 19. At the same time, based on the above-mentioned setting of the marking component 16, in order to adapt to the simultaneous use of the marking component 16 and the pressure seat 19, a through hole 25 for the mark rod 1602 to pass through can be opened on the pressure seat 19, and the mark rod 1602 can pass through the avoidance area 24.

[0060] The above describes an embodiment of the present invention in detail. However, the above content is only a preferred embodiment of the present invention and should not be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent application of the present invention.

Claims

1. A detection tool for a pressure sensor, characterized in that: The invention comprises a lower die (2) arranged on a lower die base (1) and an upper die (4) arranged on an upper die base (3), and the upper die (4) can move closer to or away from the lower die (2). The lower die (2) is provided with a first blind hole (5) for inserting a pressure interface (102), and the upper die (4) is provided with a second blind hole (6) for accommodating an adapter (101) and a cable plug (103). When the upper die (4) moves closer to the lower die (2) until the two are in a mold-clamping state, the adapter (101) blocks the first blind hole (5) and the lower die (2) blocks the second blind hole (6). The first blind hole (5) and the second blind hole (6) respectively constitute an airtight chamber and a detection chamber.

2. The detection tool for a pressure sensor according to claim 1, characterized in that: The inner side wall of the second blind hole (6) is provided with a hole shoulder (7) so that when the upper die (4) moves toward the lower die (2), the hole shoulder (7) applies a force along the axis direction of the second blind hole (6) to the transition part.

3. A detection tool for a pressure sensor according to claim 1 or 2, characterized in that: The lower die (2) is provided with a receiving groove (8) at a peripheral position of the first blind hole (5), and sealing rings are provided at the receiving groove (8) and the end position of the first blind hole (5). The adapter portion (101) and the lower die (2) can respectively abut against the corresponding sealing rings to achieve the sealing of the first blind hole (5) and the second blind hole (6).

4. The detection tool for a pressure sensor according to claim 3, characterized in that: The lower mold (2) is provided with a first through hole, and a connector (10) is sealed at one end of the first through hole to form the first blind hole (5). The connector (10) is provided with a first connecting hole (11) connected to the first blind hole (5), and the first connecting hole (11) can be opened and closed.

5. The detection tool for a pressure sensor according to claim 4, characterized in that: The connector (10) is provided with a groove (12) for receiving the end of the pressure interface (102), so that the pressure interface (102) and the first connecting hole (11) are coaxially arranged.

6. The detection tool for a pressure sensor according to claim 5, characterized in that: The upper mold (4) is provided with a second connecting hole (13) connected to the second blind hole (6), and the second connecting hole (13) can be opened and closed.

7. A detection tool for a pressure sensor according to claim 1 or 2, characterized in that: The inspection tool also includes a cabinet (14), wherein the upper die base (3) and the lower die base (1) are respectively arranged at the top and bottom of the cabinet (14), and a driving member (15) is provided on the cabinet (14) for driving the upper die base (3) to move toward or away from the lower die (2).

8. The detection tool for a pressure sensor according to claim 7, characterized in that: The inspection tool further comprises a marking assembly (16), wherein the marking assembly (16) comprises a power source (1601) fixedly arranged on the cabinet (14) and a marking rod (1602) movably arranged on the lower die base (1), wherein the marking rod (1602) is located on the motion path of the execution end of the power source (1601) along its length direction, the marking rod (1602) is arranged opposite to the adapter (101), and a return spring (1603) fixedly connected to the marking rod (1602) is provided on the lower die base (1).

9. The detection tool for a pressure sensor according to claim 7, characterized in that: The detection tool also includes an air blowing component, which includes fans (17) arranged on two sides of the cabinet (14) relative to each other.

10. The detection tool for a pressure sensor according to claim 1, characterized in that: A photoelectric switch sensor (18) is provided on the lower die base (1), and the emission end of the photoelectric switch sensor (18) faces the lower die base (1).

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