Thin film pressure sensor testing device

Abstract

The utility model belongs to the technical field of pressure sensor testing devices, and particularly relates to a thin film pressure sensor testing device which comprises a control box, a limiting supporting block is arranged on the top of the control box, a through hole used for containing a weight is formed in the limiting supporting block, and a pressing block is arranged on the control box corresponding to the through hole. A stress block for bearing the weight is arranged on the pressing block; a limiting pressing block with a magnet is arranged on one side of the limiting supporting block and connected with the control box through attraction of the magnet. The stress end of the film pressure sensor penetrates through the bottom of the pressing block and then is connected with the control box in a matched mode through a positioning structure, and the wiring end of the film pressure sensor penetrates through the bottom of the limiting pressing block with the magnet and then is connected to the resistance meter. The positioning device is simple in positioning operation, convenient to disassemble and assemble, simple in structure and convenient to install, and manual auxiliary positioning tests are reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to pressure sensor testing arrangement technical field, concretely relates to a kind of membrane pressure sensor testing device. BACKGROUND

[0002] Membrane pressure sensor testing device, its components generally have the resistance meter of detecting sensor resistance change, and the positioning mechanism for positioning membrane pressure sensor.

[0003] Membrane pressure sensor testing device circuit part, switching power supply is used, resistance meter is powered, and the output of adapter plate is connected to resistance meter simultaneously, and input part is connected to the membrane pressure sensor to be measured.

[0004] The structure part of existing membrane pressure sensor testing device, the line of the membrane pressure sensor to be measured is profiled slotting in the passing part, i.e. the slot fixed to it is set according to the shape of membrane pressure sensor, which leads to the inconvenience of disassembling membrane pressure sensor;Limiting hole / limiting magnet is used to fix sensor, and weight is placed to test it.

[0005] The existing membrane pressure sensor lacks effective determination method and simple testing device, and the utility model provides a kind of simple testing device for determining the function of membrane pressure sensor. UTILITY MODEL CONTENT

[0006] The problem to be solved by the utility model is that the structure part of existing membrane pressure sensor testing device is profiled slotting in the passing part of the line of the membrane pressure sensor to be measured, which leads to the inconvenience of disassembling membrane pressure sensor.

[0007] In order to solve the above technical problems, the utility model provides the following technical scheme:

[0008] A kind of membrane pressure sensor testing device, including control box,

[0009] Limiting support block is arranged on the top of control box, limiting support block is provided with through hole for accommodating weight, and pressure block is arranged on the control box corresponding to the through hole, and force block for bearing weight is arranged on the pressure block;

[0010] Magnet limiting pressure block is arranged on one side of limiting support block, and magnet limiting pressure block is connected with control box by magnet attraction;

[0011] The force end of membrane pressure sensor is arranged in the bottom of pressure block, and is connected with control box by positioning structure, and the wiring end of membrane pressure sensor is arranged in the bottom of magnet limiting pressure block, and is connected to resistance meter.

[0012] Further, two bases are arranged between the control box and the limiting support block, the limiting support block and the base are connected through pin hole cooperation, limiting support block two ends are provided with positioning hole one, the base is provided with positioning pin one, the positioning hole one and the positioning pin one are connected in cooperation.

[0013] Further, the pin hole cooperation is adopted between the pressing block and the control box, wherein the pressing block is provided with positioning hole two at both ends, and the positioning hole two is arranged in the positioning pin two arranged on the control box.

[0014] Further, the force receiving end of the thin film pressure sensor and the positioning structure of the control box are connected through pin hole cooperation, wherein the force receiving end of the thin film pressure sensor is provided with positioning hole three, and the positioning hole three is arranged in the positioning pin three arranged on the control box.

[0015] Further, the force block and the pressing block are an integrated assembly.

[0016] Further, the adapter plate includes an input terminal, an output terminal, and a compensation resistor connected in series between the input terminal and the output terminal, the compensation resistor includes a plurality of parallel resistors, the input terminal of the adapter plate is connected to the wiring end of the thin film pressure sensor, and the output terminal of the adapter plate is connected to the resistance meter.

[0017] Further, the output terminal of the adapter plate includes two terminals connected to the input end IN+ and the input end IN- of the resistance meter respectively.

[0018] Further, the test button is further included, the power supply end VCC of the resistance meter is connected with a switching power supply through the test button, and the switching power supply is connected with a power socket.

[0019] Further, the over-limit indicating lamp is further included, one end of the switching power supply is connected with the over-limit indicating lamp, the other end of the over-limit indicating lamp is connected to the negative electrode S1- of the upper limit relay of the resistance meter, and the positive electrode S1+ of the upper limit relay of the resistance meter is connected with the ground end GND of the resistance meter.

[0020] Compared with the prior art, the utility model has the advantages of:

[0021] 1. The force receiving end of the thin film pressure sensor is connected with the control box through the positioning structure, the wiring end of the thin film pressure sensor is arranged in the bottom of the magnetic limiting pressing block after being connected to the resistance meter, the whole thin film pressure sensor is arranged under the pressing block and the magnetic limiting pressing block, the magnetic limiting pressing block is attracted quickly, the positioning operation of the thin film pressure sensor is simple, the thin film pressure sensor is convenient to disassemble and assemble, the manual auxiliary positioning test is reduced, and the structure is simple and convenient to install.

[0022] 2. The utility model can effectively avoid the difficulty of simultaneously performing multiple operations when personnel test by placing the weight on the limiting support block and testing through the control test button.

[0023] 3. The utility model discloses easy to process component, when selecting control part, basically selects standard part, reduces cost waste, and each element is also easy to assemble.

[0024] 4. The utility model discloses " through simple test device, realize the placement weight, read resistance value to judge the function of thin film pressure sensor, and the error between actual test and standard is corrected through compensation resistance", can make it more accurate evaluation thin film pressure sensor function normal. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is the three-dimensional schematic view of thin film pressure sensor test device of the embodiment of the utility model;

[0026] Figure 2 It is the front view of Figure 1 ;

[0027] Figure 3 It is the enlarged view of A of Figure 2 ;

[0028] Figure 4 It is the three-dimensional schematic view of thin film pressure sensor test device of the embodiment of the utility model, with weight;

[0029] Figure 5 It is the schematic diagram of partial circuit connection of the embodiment of the utility model;

[0030] Figure 6 It is the schematic diagram of resistance table peripheral circuit connection of the embodiment of the utility model;

[0031] Figure 7 It is the circuit diagram of adapter board of the embodiment of the utility model.

[0032] Reference signs:

[0033] 1 is weight, 2 is limit support block, 21 is through -hole, 22 is locating hole one, 3 is limit pressure block with magnet, 4 is adapter board, 5 is resistance table, 6 is power socket, 7 is overrun indicating lamp, 8 is test button, 9 is switching power supply, 10 is output, 11 is compensation resistance, 12 is input terminal, 13 is thin film pressure sensor, 132 is locating hole three, 14 is control box, 141 is locating pin two, 142 is locating pin three, 15 is base, 151 is locating pin one, 16 is pressure block, 161 is locating hole two, 17 is force block. DETAILED DESCRIPTION

[0034] The technical scheme of the utility model will be clearly described below in combination with the drawings. Obviously, the described embodiments are not all the embodiments of the utility model, and all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the protection scope of the utility model.

[0035] It should be noted that the terms "center", "upper", "lower", "horizontal", "left", "right", "front", "rear", "transverse", "longitudinal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0036] Embodiment

[0037] The utility model provides a kind of film pressure sensor testing device, including control box 14, two pedestals 15 are arranged on the top of control box 14.The limiting support block 2 is arranged on two pedestals 15, the through-hole 21 for accommodating weight 1 is arranged in the middle of limiting support block 2, the top position of control box 14 corresponding to the through-hole 21 is provided with pressing block 16, and the force block 17 is arranged on pressing block 16.Weight 1 is placed on force block 17 by passing through through-hole 21, and weight 1 gives the standard weight pressure of force block 17.

[0038] Limiting support block 2 is connected with pedestal 15 by pin hole cooperation, and locating hole one 22 is opened at both ends of limiting support block 2, locating pin one 151 is arranged on pedestal 15, and locating hole one 22 is connected with locating pin one 151, to limit limiting support block 2.

[0039] Pressing block 16 is provided with locating hole two 161 at both ends, and locating hole two 161 is arranged in locating pin two 141 arranged on control box 14, to limit pressing block 16.

[0040] The side of limiting support block 2 is provided with magnet limiting pressing block 3 with magnet 31, and magnet limiting pressing block 3 is automatically attracted and connected with a pair of magnets arranged on control box 14 below.

[0041] Magnet limiting pressing block 3 and pressing block 16 are provided with film pressure sensor 13 for measuring pressure to be measured at the bottom.The force end of film pressure sensor 13 is arranged at the bottom of pressing block 16, and locating hole three 132 is arranged at the force end, and locating pin three 142 is arranged on control box 14, to limit film pressure sensor 13.When weight 1 is placed on force block 17, film pressure sensor 13 can sense the standard weight pressure of weight 1 given to force block 17.

[0042] The wire end of the thin film pressure sensor 13 is inserted into the input terminal 12 of the adapter board 4 provided on the control box 14 after passing through the bottom of the magnet limiting pressure block 3.

[0043] The adapter board 4 is used for the connection and compensation of the input and output of the thin film pressure sensor 13. The adapter board 4 comprises the input terminal 12, the output terminal 10, and the compensation resistor 11 connected in series between the input terminal 12 and the output terminal 10, wherein the compensation resistor 11 comprises a plurality of parallel resistors. The output terminal 10 of the adapter board 4 is connected to the resistance meter 5, which is used for displaying the actual sensing resistance value of the measured thin film pressure sensor 13. More specifically, the output terminal 10 of the adapter board 4 comprises two terminals connected to the input end IN+ and the input end IN- of the resistance meter 5, respectively.

[0044] The resistance meter 5 is connected to the switching power supply 9 after being connected to the test button 8, which is used for controlling the on-off of the resistance meter 5, and the resistance meter 5 displays when the test button 8 is pressed. The switching power supply 9 is connected to the power socket 6. After the AC 220V voltage input from the power socket 6 passes through the switching power supply 9, the switching power supply 9 converts the AC 220V voltage into DC 12V voltage, which is used as the working voltage of the resistance meter 5. After the switching power supply 9 is connected to a test button 8 in series, the switching power supply 9 is connected to the power supply end VCC of the resistance meter 5 to supply power to the resistance meter 5.

[0045] The resistance meter 5 can be a constant-hull instrument with the model RW5641.

[0046] Meanwhile, the switching power supply is connected to the over-limit indicator light 7, one end of which is connected to DV12V, and the other end is connected to the negative pole S1- of the upper limit relay of the resistance meter. The positive pole S1+ of the upper limit relay of the resistance meter is connected to the ground end GND of the resistance meter.

[0047] Working principle:

[0048] First, the thin film pressure sensor 13 is fixed and limited, then the weight 1 is placed in the limiting support block 2, and then the thin film pressure sensor 13 is inserted into the adapter board 4. By pressing the test button 8, the display value of the resistance meter 5 is observed. Specifically,

[0049] 1) Preparation stage:

[0050] The limiting support block 2, the magnet limiting pressure block 3, and the combined assembly of the force block 17 and the pressure block 16 are taken out. The wire end of the thin film pressure sensor 13 is inserted into the input terminal 12 of the adapter board, and the force end of the thin film pressure sensor 13 with the positioning hole three 132 is sleeved with the positioning pin three 142;

[0051] Then the magnet limiting pressure block 3 is put back, and the magnet automatically attracts and limits the position below the control box 14. The combined assembly of the force block 17 and the pressure block 16 is put back, and the pressure block 16 is connected to the control box 14 through the pin hole.

[0052] Put the limit support block 2 back, and then place the standard weight 1 in the limit support block 2.

[0053] 2) Test phase:

[0054] Press the test button 8, the film pressure sensor 13 test value can be read from the resistance table 5; when the film pressure sensor 13 test value exceeds its set limit, the overrun indicating lamp 7 lights up. In actual test, the film pressure sensor 13 test value may have a certain deviation from the standard, and through the adapter plate 4, the corresponding compensation resistance 11 is increased.

[0055] The constituent parts of the embodiment are easy to process, and the core components all adopt standard parts. The elements of the embodiment are also easy to assemble.

[0056] The utility model discloses a simple test device, to realize the placement weight 1, read resistance value to judge film pressure sensor 13 function, and through compensation resistance 11, the error between actual test and standard can be corrected, so that it can more accurately evaluate its material function normal.

[0057] The above technical features constitute the best embodiment of the utility model, which has strong adaptability and the best implementation effect, and unnecessary technical features can be added or reduced according to actual needs to meet the needs of different situations.

[0058] Finally, it should be explained that the above content is only used to explain the technical scheme of the utility model, and not to limit the protection scope of the utility model. Simple modification or equivalent replacement of the technical scheme of the utility model by ordinary skilled in the art does not deviate from the essence and scope of the technical scheme of the utility model.

Claims

1. A thin film pressure sensor testing device, comprising a control box, characterized in that, a limiting support block is arranged on the top of the control box, the limiting support block is provided with a through hole for accommodating a weight, and the control box corresponding to the through hole is provided with a pressing block, and the pressing block is provided with a force block for bearing the weight; a magnet limiting pressing block is arranged on one side of the limiting support block, and the magnet limiting pressing block is connected with the control box through magnetic attraction; the force receiving end of the thin film pressure sensor is arranged through the bottom of the pressing block and connected with the control box through a positioning structure, and the wiring end of the thin film pressure sensor is arranged through the bottom of the magnet limiting pressing block and connected to an ohmmeter.

2. A thin film pressure sensor test device according to claim 1, wherein, Two bases are arranged between the control box and the limiting support block, the limiting support block and the base are connected through a pin hole, and the limiting support block is provided with a positioning hole one at both ends, and the base is provided with a positioning pin one, and the positioning hole one and the positioning pin one are connected.

3. A thin film pressure sensor test device according to claim 1, wherein, The pressing block and the control box are connected through a pin hole, and the pressing block is provided with a positioning hole two at both ends, and the positioning hole two is arranged through the positioning pin two arranged on the control box.

4. The thin film pressure sensor test device of claim 1, wherein, The force receiving end of the thin film pressure sensor and the positioning structure of the control box are connected through a pin hole, and the force receiving end of the thin film pressure sensor is provided with a positioning hole three, and the positioning hole three is arranged through the positioning pin three arranged on the control box.

5. The thin film pressure sensor test device of claim 1, wherein, The force block and the pressing block are an integrated assembly.

6. The thin film pressure sensor test device of claim 1, wherein, The adapter board includes an input terminal, an output terminal, and a compensation resistor connected in series between the input terminal and the output terminal, the compensation resistor includes a plurality of parallel resistors, the input terminal of the adapter board is connected to the wiring end of the thin film pressure sensor, and the output terminal of the adapter board is connected to the ohmmeter.

7. A thin film pressure sensor test device according to claim 6, wherein, The output terminal of the adapter board includes two terminals connected to the input terminal IN+ and the input terminal IN- of the ohmmeter.

8. The thin film pressure sensor test device of claim 1, wherein, The testing button is further included, and the power supply end VCC of the ohmmeter is connected with a switching power supply through the testing button, and the switching power supply is connected with a power socket.

9. A thin film pressure sensor test device according to claim 8, wherein, The over-limit indicator light is further included, one end of the switching power supply is connected with the over-limit indicator light, the other end of the over-limit indicator light is connected to the negative electrode S1- of the upper limit relay of the ohmmeter, and the positive electrode S1+ of the upper limit relay of the ohmmeter is connected with the ground end GND of the ohmmeter.

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