A pressure sensor calibration apparatus

Abstract

The utility model discloses a pressure sensor calibration equipment, including bottom plate, calibration device, box body, extruding block and pressure sensor, the bottom of calibration device and the right side fixed connection of bottom plate top, the bottom of box body and the top fixed connection of bottom plate. The utility model discloses through setting up the disc, when needing to fix the center point of box body to pressure sensor fast, rotates the disc, and four extruding blocks are under the location of spacing assembly, and along four arc -shaped groove's track, and the four sliding blocks of smoothly being, inwardly central push, until clamping pressure sensor, solved four extruding blocks, and need to be driven to adjust in the center through two threaded rods, realize the central fixed clamping of pressure sensor, therefore when the calibration of pressure sensor in large quantities, the central adjustment of four extruding blocks is not only unstable, but also very complicated, thereby the problem of seriously reducing the calibration efficiency, reaches the effect of fast four -way central clamping.

Description

Technical Field

[0001] This utility model relates to the technical field of pressure sensor calibration equipment, specifically a pressure sensor calibration device. Background Technology

[0002] A pressure sensor is a device or apparatus that can sense pressure signals and convert them into usable electrical signals according to certain rules. Pressure sensors typically consist of a pressure-sensitive element and a signal processing unit. Pressure sensors need to be calibrated during manufacturing to ensure their accuracy.

[0003] For example, application number CN202223594770.2 describes a pressure sensor calibration device. The device includes a base with a housing slidably connected to its top. A test sensor is fixedly attached to the top of the base, and the housing is located at the bottom of the test sensor. By pulling the housing out from the bottom of the test sensor, the pressure sensor is placed in the middle of the housing. Then, a knob is turned to move two sets of compression plates along a threaded rod, bringing them closer to the pressure sensor until they are tightly pressed against it. The threaded rod is then rotated again to bring the two sets of compression plates tightly against the pressure sensor. The four compression plates fix the pressure sensor in the middle of the housing. The housing is then moved to the bottom of the test sensor. This device can fix the pressure sensor in the middle of the housing, preventing displacement due to compression and ensuring that the pressure applied to the sensor does not shift, thus guaranteeing the accuracy of the pressure sensor calibration.

[0004] Based on the search of the aforementioned patents and the findings of existing equipment, while the aforementioned equipment can solve the problem that existing pressure sensor calibration devices, when used directly placing the pressure sensor at the bottom of the test sensor, may cause the pressure sensor to shift due to compression when pressure is applied, resulting in errors in the pressure received by the pressure sensor and affecting the accuracy of pressure sensor calibration, in practice, the four compression blocks need to be centered and adjusted by two threaded rods to achieve centered and fixed clamping of the pressure sensor. Therefore, when calibrating a large number of pressure sensors, the centering adjustment of the four compression blocks is not only unstable but also very cumbersome, thus seriously reducing calibration efficiency. Utility Model Content

[0005] To address the problems mentioned in the background art, the present invention aims to provide a pressure sensor calibration device with the advantage of rapid four-way centering clamping. This solves the problem that when calibrating a large number of pressure sensors, the centering adjustment of the four compression blocks is not only unstable but also very cumbersome, thus seriously reducing calibration efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a pressure sensor calibration device, comprising a base plate, a calibration device, a housing, a pressing block, and a pressure sensor. The bottom of the calibration device is fixedly connected to the right side of the top of the base plate. The bottom of the housing is fixedly connected to the top of the base plate. A central column is fixedly connected to the bottom of the inner wall of the housing. The bottom of the pressure sensor contacts the top of the central column. A disc is fitted onto the surface of the central column. The surface of the disc is slidably connected to the inner wall of the housing. An arc-shaped groove is formed on the top of the disc. Four arc-shaped grooves are formed and evenly distributed. A slider is slidably connected to the inner wall of the arc-shaped groove. The bottom of the pressing block is fixedly connected to the top of the slider. Limiting components are formed on all four sides of the housing. A fixing mechanism is movably connected to the bottom of the front of the housing via a pivot pin.

[0007] As a preferred embodiment of this utility model, the limiting component includes a limiting groove, which is formed on the four sides of the box body. A limiting rod is slidably connected to the inner wall of the limiting groove, and the inner side of the limiting rod is fixedly connected to the outer side of the extrusion block.

[0008] In a preferred embodiment of this invention, the fixing mechanism includes a wing screw, the back of which is movably connected to the bottom of the front of the box via a pin. A mounting block is threaded onto the surface of the wing screw, and a clamping rod is movably connected to the top of the mounting block via a pin. The clamping rod is inclined, and the top of the back of the clamping rod contacts the front of the box. The clamping rod is located at the bottom of the disc, and guide components are provided on both sides of the mounting block.

[0009] As a preferred embodiment of this utility model, the guide component includes a groove, which is formed on both sides of the mounting block. A straight rod is slidably connected to the inner wall of the groove, and the back of the straight rod is fixedly connected to the front of the box.

[0010] As a preferred embodiment of this utility model, the outer periphery of the top and bottom of the disc is provided with friction-enhancing grooves, and a plurality of friction-enhancing grooves are provided and distributed equidistantly in a ring.

[0011] As a preferred embodiment of this utility model, a rubber block is fixedly connected to the top of the clamping rod, and the back of the rubber block is in contact with the front of the box body.

[0012] As a preferred embodiment of this invention, a rubber pad is fixedly connected to the inner side of the extrusion block.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model, by setting a disc, allows the pressure sensor to be quickly fixed at the center point of the box. By rotating the disc, the four squeezing blocks are smoothly pushed inward and centered along the trajectory of the four arc-shaped grooves by the four sliders under the limit of the limiting component, until the pressure sensor is clamped. This solves the problem that the four squeezing blocks need to be driven and adjusted by two threaded rods to achieve the centered and fixed clamping of the pressure sensor. Therefore, when calibrating a large number of pressure sensors, the centering adjustment of the four squeezing blocks is not only unstable but also very cumbersome, which seriously reduces the calibration efficiency. This invention achieves the effect of rapid four-way centered clamping.

[0014] 2. This utility model, by setting a limiting component, allows the slider to slide along the trajectory of the arc groove when the user rotates the disc, thus pushing the four extrusion blocks towards the center position. As the disc rotates, the extrusion blocks pull the limiting rod, sliding along the trajectory of the limiting groove. Thus, through the cooperation of the limiting groove and the limiting rod, the slider can slide along the trajectory of the arc groove during the rotation of the disc, pushing the extrusion blocks towards the center position.

[0015] 3. This utility model has a fixing mechanism. When the user rotates the disc, the four squeezing blocks move in the center and clamp the pressure sensor. Then the user turns the wing screw to drive the mounting block to move, which in turn causes the inclined clamping rod to move against the box body and rotate to the vertical position. Finally, the clamping rod presses against the disc and generates a clamping force on the disc, thus fixing the disc. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is an exploded view of the components of the fixing mechanism of this utility model; Figure 3 This is a cross-sectional view of the disc and an exploded view of some parts of the present invention.

[0017] In the diagram: 1. Base plate; 2. Calibration device; 3. Box body; 4. Extrusion block; 5. Pressure sensor; 6. Central column; 7. Disc; 8. Arc groove; 9. Slider; 10. Limiting component; 101. Limiting groove; 102. Limiting rod; 11. Fixing mechanism; 111. Wing screw; 112. Mounting block; 113. Clamping rod; 12. Guide component; 121. Groove; 122. Straight rod; 13. Friction-enhancing groove; 14. Rubber block; 15. Rubber pad. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] like Figures 1 to 3 As shown, the present invention provides a pressure sensor 5 calibration device, including a base plate 1, a calibration device 2, a box 3, a pressing block 4, and a pressure sensor 5. The bottom of the calibration device 2 is fixedly connected to the right side of the top of the base plate 1, the bottom of the box 3 is fixedly connected to the top of the base plate 1, a central column 6 is fixedly connected to the bottom of the inner wall of the box 3, the bottom of the pressure sensor 5 is in contact with the top of the central column 6, a disc 7 is sleeved on the surface of the central column 6, the surface of the disc 7 is slidably connected to the inner wall of the box 3, an arc groove 8 is opened on the top of the disc 7, four arc grooves 8 are opened and are evenly distributed, a slider 9 is slidably connected to the inner wall of the arc groove 8, the bottom of the pressing block 4 is fixedly connected to the top of the slider 9, limit components 10 are opened on all four sides of the box 3, and a fixing mechanism 11 is movably connected to the bottom of the front of the box 3 through a shaft pin.

[0020] refer to Figure 1 and Figure 2 The limiting component 10 includes a limiting groove 101, which is opened on the four sides of the box 3. A limiting rod 102 is slidably connected to the inner wall of the limiting groove 101, and the inner side of the limiting rod 102 is fixedly connected to the outer side of the extrusion block 4.

[0021] As a technical optimization of this utility model, by setting a limiting component 10, when the user rotates the disc 7, the slider 9 needs to slide along the trajectory of the arc groove 8 to push the four extrusion blocks 4 towards the center position. As the disc 7 rotates, the extrusion blocks 4 will pull the limiting rod 102 and slide along the trajectory of the limiting groove 101. Thus, through the cooperation of the limiting groove 101 and the limiting rod 102, the slider 9 can slide along the trajectory of the arc groove 8 during the rotation of the disc 7, pushing the extrusion blocks 4 towards the center position.

[0022] refer to Figure 1 and Figure 2The fixing mechanism 11 includes a wing screw 111. The back of the wing screw 111 is movably connected to the bottom of the front of the box 3 via a shaft pin. The surface of the wing screw 111 is threaded with a mounting block 112. The top of the mounting block 112 is movably connected with a clamping rod 113 via a shaft pin. The clamping rod 113 is inclined. The top of the back of the clamping rod 113 contacts the front of the box 3. The clamping rod 113 is located at the bottom of the disc 7. Guide components 12 are provided on both sides of the mounting block 112.

[0023] As a technical optimization of this utility model, by setting a fixing mechanism 11, when the user rotates the disc 7 to move the four squeezing blocks 4 in the center and clamp the pressure sensor 5, the user then turns the butterfly screw 111 to drive the mounting block 112 to move, thereby causing the inclined clamping rod 113 to move against the box body 3 and rotate towards the vertical position, until the clamping rod 113 abuts against the disc 7 and generates a clamping force on the disc 7, thus fixing the disc 7.

[0024] refer to Figure 2 The guide component 12 includes a groove 121, which is formed on both sides of the mounting block 112. A straight rod 122 is slidably connected to the inner wall of the groove 121, and the back of the straight rod 122 is fixedly connected to the front of the box 3.

[0025] As a technical optimization of this utility model, by setting the guide component 12, when the user turns the wing bolt to drive the mounting block 112 to move, as the mounting block 112 moves, the grooves 121 on both sides of the mounting block 112 slide along the straight rod 122. Then, through the cooperation of the grooves 121 and the straight rod 122, the mounting block 112 is limited and guided, so that the mounting block 112 can move smoothly and stably in a straight horizontal line under the drive of the rotation of the wing screw 111, pushing the clamping rod 113 to fit against the box body 3 and rotate from inclined to vertical.

[0026] refer to Figure 3 The top and bottom periphery of the disc 7 are provided with friction-enhancing grooves 13, and there are several friction-enhancing grooves 13 distributed in a ring at equal intervals.

[0027] As a technical optimization of this utility model, by setting the friction-enhancing grooves 13, when the user rotates the disc 7, the pattern formed on the disc 7 by the several friction-enhancing grooves 13 increases the friction between the disc 7 and the user's hand, thereby making it easier for the user to rotate the disc 7.

[0028] refer to Figure 2 A rubber block 14 is fixedly connected to the top of the clamping rod 113, and the back of the rubber block 14 is in contact with the front of the box body 3.

[0029] As a technical optimization of this utility model, by setting a rubber block 14, when the clamping rod 113 contacts the disc 7, the rubber block 14 will replace the clamping rod 113 in contact with the disc 7 and be squeezed and deformed, thereby increasing the friction between the clamping rod 113 and the disc 7, so that the clamping rod 113 can more firmly press against the disc 7.

[0030] refer to Figure 2 A rubber pad 15 is fixedly connected to the inner side of the extrusion block 4.

[0031] As a technical optimization of this utility model, by setting a rubber pad 15, when the four extrusion blocks 4 move in the center and clamp the pressure sensor 5, the rubber pad 15 will replace the extrusion blocks 4 and contact the pressure sensor 5, preventing damage caused by excessive extrusion force during clamping, thereby improving the safety of the pressure sensor 5.

[0032] The working principle and usage process of this utility model are as follows: When the user needs to calibrate the pressure sensor 5, first place the pressure sensor block on the central column 6, then rotate the disc 7 to make the slider 9 pull the limiting rod 102 and move along the trajectory of the limiting groove 101. Then, through the cooperation of the limiting groove 101 and the limiting rod 102, the slider 9 can move smoothly along the trajectory of the arc groove 8, pushing the extrusion block 4 to move. At this point, the four extrusion blocks 4 move synchronously in the center until the extrusion block 4 clamps the pressure sensor 5. Then, turn the wing screw 111 to drive the mounting block 112 to move. Then, the grooves 121 on both sides of the mounting block 112 open up to slide along the straight rod 122, providing a limit for the mounting block 112. Positioning and guiding allow the mounting block 112 to move smoothly and stably along a straight horizontal line under the drive of the rotating wing screw 111, pushing the clamping rod 113 so that the inclined clamping rod 113 moves against the box body 3 and rotates towards the vertical position until the clamping rod 113 abuts against the disc 7, generating a clamping force on the disc 7, thus fixing the disc 7 in place. Finally, the calibration device 2 can be started to calibrate and adjust the pressure sensor 5. (The specific working principle of the calibration device 2 can be found in the utility model of a calibration device 2 for a pressure sensor 5, which is a well-established and publicly available technology, and will not be elaborated further here.) This gives it the advantage of quick four-way centering clamping.

[0033] In summary, this pressure sensor 5 calibration device, by setting up a disc 7, allows the four squeezing blocks 4 to be smoothly pushed inward and centered along the trajectory of the four arc-shaped grooves 8 by the four sliders 9 under the limit component 10 when it is necessary to quickly fix the pressure sensor 5 at the center point of the housing 3. This solves the problem that the four squeezing blocks need to be centered and adjusted by two threaded rods to achieve the centered and fixed clamping of the pressure sensor. Therefore, when calibrating a large number of pressure sensors, the centering adjustment of the four squeezing blocks is not only unstable but also very cumbersome, which seriously reduces the calibration efficiency.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pressure sensor (5) calibration device, comprising a base plate (1), a calibration device (2), a housing (3), a compression block (4), and a pressure sensor (5), characterized in that: The bottom of the calibration device (2) is fixedly connected to the right side of the top of the base plate (1), the bottom of the box (3) is fixedly connected to the top of the base plate (1), the bottom of the inner wall of the box (3) is fixedly connected to the center column (6), the bottom of the pressure sensor (5) is in contact with the top of the center column (6), the surface of the center column (6) is fitted with a disc (7), the surface of the disc (7) is slidably connected to the inner wall of the box (3), the top of the disc (7) is provided with an arc groove (8), there are four arc grooves (8) and they are evenly distributed, the inner wall of the arc groove (8) is slidably connected to a slider (9), the bottom of the extrusion block (4) is fixedly connected to the top of the slider (9), the four sides of the box (3) are provided with limit components (10), and the bottom of the front of the box (3) is movably connected to a fixing mechanism (11) through a shaft pin.

2. The pressure sensor (5) calibration device according to claim 1, characterized in that: The limiting component (10) includes a limiting groove (101), which is opened on the four sides of the box (3). A limiting rod (102) is slidably connected to the inner wall of the limiting groove (101), and the inner side of the limiting rod (102) is fixedly connected to the outer side of the extrusion block (4).

3. The pressure sensor (5) calibration device according to claim 1, characterized in that: The fixing mechanism (11) includes a wing screw (111). The back of the wing screw (111) is movably connected to the bottom of the front of the box body (3) via a shaft pin. The surface of the wing screw (111) is threaded with a mounting block (112). The top of the mounting block (112) is movably connected with a clamping rod (113) via a shaft pin. The clamping rod (113) is inclined. The top of the back of the clamping rod (113) is in contact with the front of the box body (3). The clamping rod (113) is located at the bottom of the disc (7). Guide components (12) are provided on both sides of the mounting block (112).

4. The pressure sensor (5) calibration device according to claim 3, characterized in that: The guide component (12) includes a groove (121) which is formed on both sides of the mounting block (112). A straight rod (122) is slidably connected to the inner wall of the groove (121). The back of the straight rod (122) is fixedly connected to the front of the box body (3).

5. A pressure sensor (5) calibration device according to claim 1, characterized in that: The disc (7) has friction-enhancing grooves (13) on the outer periphery of both the top and bottom. The friction-enhancing grooves (13) are provided in a plurality of numbers and are distributed in a ring at equal intervals.

6. A pressure sensor (5) calibration device according to claim 3, characterized in that: A rubber block (14) is fixedly connected to the top of the clamping rod (113), and the back of the rubber block (14) is in contact with the front of the box body (3).

7. A pressure sensor (5) calibration device according to claim 1, characterized in that: A rubber pad (15) is fixedly connected to the inner side of the extrusion block (4).

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