Calibration device of pressure sensor

Abstract

The utility model discloses a calibration device of a pressure sensor, and relates to the technical field of pressure sensor production, in particular to the calibration device of the pressure sensor, which comprises a base, and a calibration mechanism is arranged on the base and is used for calibrating and detecting the pressure sensor. A positioning mechanism is arranged on the base and used for positioning the pressure sensor, and the positioning mechanism comprises a supporting assembly which comprises a base arranged on the base, a bottom column fixed to the bottom of the base and a servo motor installed in the center of the bottom of the base; the bearing assembly comprises a platen fixed to the top of the base. After the pressure sensor is placed on the platen, the output end of the servo motor drives the driving gear to cooperate with the driven gear to drive the shaft lever to rotate, and the shaft lever drives the positioning head to move towards the axis through the connecting rod, so that the pressure sensor between the shaft lever and the positioning head is fixed, and the pressure sensor is prevented from shifting due to extrusion in the calibration process. And the calibration accuracy is influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure sensor production, in particular to a pressure sensor calibration device. Background Art

[0002] A pressure sensor is a device or apparatus that can sense pressure signals and convert them into usable output electrical signals according to certain rules. A pressure sensor is usually composed of a pressure sensitive element and a signal processing unit. The pressure sensor needs to be calibrated before it is produced to ensure its accuracy.

[0003] After checking the publication (announcement) number: CN219328560U, a pressure sensor calibration device is disclosed. This technology discloses "a pressure sensor calibration device, including a base, a box body is slidably connected to the top of the base, a test sensor is fixed to the top of the base, and the box body is located at the bottom of the test sensor" and other technical solutions, which have "fixing the pressure sensor in the middle of the box body to prevent the pressure sensor from being displaced due to squeezing, so that the pressure applied to the pressure sensor will not be offset, and the accuracy of the pressure sensor calibration is ensured" and other technical effects;

[0004] In the above solution, the sensor fixing process is rather cumbersome, and two sets of knobs need to be manually rotated to ensure that the sensors are securely fixed on both the front and rear sides and the left and right sides. This operation method will undoubtedly greatly reduce work efficiency when faced with the calibration and detection tasks of a large number of sensors. More importantly, since each manual fixation will inevitably introduce slight differences, it is difficult to ensure that the conditions of each calibration and detection can remain completely consistent, which may affect the accuracy and reliability of the calibration results. Utility Model Content

[0005] In view of the deficiencies of the prior art, the utility model provides a pressure sensor calibration device, which has the characteristics of automatically delivering the pressure sensor transmitted by a conveyor belt to a positioning mechanism, and automatically positioning and fixing the pressure sensor through the positioning mechanism.

[0006] To achieve the above objectives, the utility model is implemented through the following technical solutions: a pressure sensor calibration device, including a base, a calibration mechanism is provided on the base and used to calibrate and detect the pressure sensor, a positioning mechanism is provided on the base and used to position the pressure sensor, and the positioning mechanism includes:

[0007] A support assembly includes a base arranged on the base, a bottom column fixed at the bottom of the base, and a servo motor installed at the center of the bottom of the base;

[0008] The bearing assembly includes a table plate fixed on the top of the base, three slide seats distributed in a circle fixed on the top of the table plate, a positioning head slidably installed inside the slide seat, and a connecting rod is pivotally connected to the outer end of the positioning head, three circumferentially distributed shaft rods are rotatably installed inside the table plate, and a driven gear is fixed to the outer wall of the lower end of the shaft rod, and a driving gear is rotatably installed at the bottom of the table plate, and the driving gear is fixedly connected to the output end of the servo motor.

[0009] Preferably, the outer end of the connecting rod is pivotally connected to one side of the top of the shaft rod.

[0010] Preferably, the driving gear and the three driven gears are meshed with each other.

[0011] Preferably, the calibration mechanism comprises:

[0012] The detection component includes a stand fixed at the rear end of the top of the base, a first cylinder is installed at the front end of the stand, a detection head is installed at the output end of the first cylinder, a control panel is installed at one side of the front end of the stand, and a pick-and-place mechanism is provided on the first cylinder for picking up and placing the pressure sensor;

[0013] The mobile assembly includes a base plate that slides on top of the base.

[0014] Preferably, the moving assembly further comprises a second cylinder installed at the rear end of the top of the base, and the output end of the second cylinder is connected to the bottom plate.

[0015] Preferably, the pick-and-place mechanism includes a y-axis electric slide fixed at the front end of the first cylinder, and a z-axis electric slide is installed on the slider of the y-axis electric slide, and a pneumatic clamp is installed on the slider of the z-axis electric slide, and clamps are fixed on both sides of the pneumatic clamp. Beneficial Effects

[0016] The utility model provides a pressure sensor calibration device. Compared with the prior art, it has the following beneficial effects:

[0017] (1) When the pressure sensor is placed on the table, the output end of the servo motor drives the active gear to cooperate with the driven gear to drive the shaft to rotate. The shaft drives the positioning head to move toward the axis through the connecting rod, thereby fixing the pressure sensor in between to prevent the pressure sensor from being displaced due to squeezing during the calibration process, which affects the accuracy of the calibration.

[0018] (2) Before placing the force sensor, the output end of the second cylinder is used to drive the positioning mechanism on the bottom plate to move to the front. When calibrating the pressure sensor, the output end of the second cylinder is used to drive the positioning mechanism on the bottom plate to move to the back. The pressure sensor transmitted from the conveyor belt can be picked up and placed on the table by the pick-and-place mechanism, so that the pressure sensor transmitted from the conveyor belt can be automatically sent to the positioning mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0020] Figure 2 It is a structural schematic diagram of the positioning mechanism in the utility model;

[0021] Figure 3 It is a structural schematic diagram of the load-bearing component in the utility model;

[0022] Figure 4 It is a structural schematic diagram of the pick-up and place mechanism in the utility model.

[0023] In the figure: 1. base; 2. calibration mechanism; 21. detection component; 211. stand; 212. first cylinder; 213. detection head; 214. control panel; 22. moving component; 221. bottom plate; 222. second cylinder; 3. positioning mechanism; 31. supporting component; 311. base; 312. bottom column; 313. servo motor; 32. bearing component; 321. table; 322. slide; 323. positioning head; 324. connecting rod; 325. shaft; 326. driven gear; 327. driving gear; 4. pick-and-place mechanism; 41. y-axis electric slide; 42. z-axis electric slide; 43. pneumatic gripper; 44. clamp. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-4 The utility model provides a technical solution for a pressure sensor calibration device: a pressure sensor calibration device, comprising a base 1, a calibration mechanism 2 is provided on the base 1 and is used to calibrate and detect the pressure sensor, a positioning mechanism 3 is provided on the base 1 and is used to position the pressure sensor, and the positioning mechanism 3 includes:

[0026] The support assembly 31 includes a base 311 disposed on the base 1, a bottom column 312 fixed at the bottom of the base 311, and a servo motor 313 installed at the center of the bottom of the base 311;

[0027] The bearing assembly 32 includes a table plate 321 fixed on the top of the base 311, three slide seats 322 fixed on the top of the table plate 321 and distributed in a circle, a positioning head 323 is slidably installed inside the slide seat 322, and a connecting rod 324 is pivotally connected to the outer end of the positioning head 323, three circumferentially distributed shaft rods 325 are rotatably installed inside the table plate 321, and a driven gear 326 is fixed to the outer wall of the lower end of the shaft rod 325, and a driving gear 327 is rotatably installed at the bottom of the table plate 321, and the driving gear 327 is fixedly connected to the output end of the servo motor 313.

[0028] In this embodiment, when the pressure sensor is placed on the table 321, the output end of the servo motor 313 drives the active gear 327 to cooperate with the driven gear 326 to drive the shaft 325 to rotate, and the shaft 325 drives the positioning head 323 to move toward the axis through the connecting rod 324, thereby fixing the pressure sensor in between, avoiding the pressure sensor from being displaced due to squeezing during the calibration process, which affects the accuracy of the calibration.

[0029] Specifically, the outer end of the connecting rod 324 is pivotally connected to one side of the top of the shaft rod 325 .

[0030] In this embodiment, when the shaft rod 325 rotates, it can drive the connecting rod 324 to slide horizontally along the inside of the sliding seat 322 .

[0031] Specifically, the driving gear 327 and the three driven gears 326 are meshed with each other.

[0032] In this embodiment, when the driving gear 327 rotates, the three driven gears 326 can be driven to rotate synchronously.

[0033] Specifically, the calibration mechanism 2 includes:

[0034] The detection assembly 21 includes a stand 211 fixed at the top rear end of the base 1, a first cylinder 212 is installed at the front end of the stand 211, and a detection head 213 is installed at the output end of the first cylinder 212, a control panel 214 is installed at one side of the front end of the stand 211, and a pick-and-place mechanism 4 is provided on the first cylinder 212 and is used to pick and place the pressure sensor;

[0035] The moving assembly 22 includes a bottom plate 221 slidably mounted on the top of the base 1 .

[0036] In this embodiment, after the pressure sensor is fixed on the positioning mechanism 3, the detection head 213 is driven to move downward through the output end of the first cylinder 212, and pressure is applied to the pressure sensor below through the detection head 213. The output value of the sensor is observed and recorded, and then the parameters of the pressure sensor are adjusted according to the calibration result so that its output value is consistent with the actual pressure value.

[0037] Specifically, the moving assembly 22 further includes a second cylinder 222 installed at the top rear end of the base 1 , and an output end of the second cylinder 222 is connected to the bottom plate 221 .

[0038] In this embodiment, before placing the force sensor, the positioning mechanism 3 on the base plate 221 is driven to move to the front by the output end of the second cylinder 222; when calibrating the pressure sensor, the positioning mechanism 3 on the base plate 221 is driven to move to the rear by the output end of the second cylinder 222.

[0039] Specifically, the picking and placing mechanism 4 includes a y-axis electric slide 41 fixed at the front end of the first cylinder 212, and a z-axis electric slide 42 is installed on the slider of the y-axis electric slide 41, and a pneumatic clamp 43 is installed on the slider of the z-axis electric slide 42, and clamps 44 are fixed on both sides of the pneumatic clamp 43.

[0040] In this embodiment, the pressure sensor transmitted from the conveyor belt can be picked up and placed on the platform 321 by the pick-and-place mechanism 4 .

[0041] The working principle and use process of the utility model are as follows: first, the pressure sensor transmitted from the conveyor belt can be picked up and placed on the platen 321 through the pick-and-place mechanism 4; then, the output end of the servo motor 313 drives the driving gear 327 to cooperate with the driven gear 326 to drive the shaft 325 to rotate, and the shaft 325 drives the positioning head 323 to move toward the axis through the connecting rod 324, thereby fixing the pressure sensor therebetween;

[0042] Then, the output end of the second cylinder 222 drives the positioning mechanism 3 on the bottom plate 221 to move to the rear, so that the pressure sensor fixed on the positioning mechanism 3 is located directly below the detection head 213;

[0043] Finally, the detection head 213 is driven downward by the output end of the first cylinder 212, and pressure is applied to the pressure sensor below through the detection head 213. The output value of the sensor is observed and recorded, and then the parameters of the pressure sensor are adjusted according to the calibration result so that its output value is consistent with the actual pressure value.

[0044] The model of the cylinder is DSNU-20-50-PPV-A, and the model of the servo motor is EDSMT-2T110-020A. Both are products using existing mature technologies and will not be elaborated on in detail. All electrical components appearing in this article are connected to the external main controller and 220V AC power.

[0045] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pressure sensor calibration device, comprising a base (1), characterized in that: The base (1) is provided with a calibration mechanism (2) for calibrating and testing the pressure sensor, and the base (1) is provided with a positioning mechanism (3) for positioning the pressure sensor, wherein the positioning mechanism (3) comprises: A support assembly (31) comprises a base (311) arranged on the base (1), a bottom column (312) fixed at the bottom of the base (311), and a servo motor (313) installed at the center of the bottom of the base (311); The bearing assembly (32) comprises a table (321) fixed on the top of the base (311), three slide seats (322) fixed on the top of the table (321) and distributed in a circle, a positioning head (323) slidably mounted inside the slide seat (322), a connecting rod (324) pivotally connected to the outer end of the positioning head (323), three shaft rods (325) rotatably mounted inside the table (321) and distributed in a circle, a driven gear (326) fixed on the outer wall of the lower end of the shaft rod (325), and a driving gear (327) rotatably mounted on the bottom of the table (321), and the driving gear (327) is fixedly connected to the output end of the servo motor (313).

2. A pressure sensor calibration device according to claim 1, characterized in that: The outer end of the connecting rod (324) is pivotally connected to one side of the top of the shaft rod (325).

3. A pressure sensor calibration device according to claim 1, characterized in that: The driving gear (327) and the three driven gears (326) are all meshed with each other.

4. A pressure sensor calibration device according to claim 1, characterized in that: The calibration mechanism (2) comprises: A detection assembly (21) comprises a stand (211) fixed at the top rear end of a base (1), a first cylinder (212) being mounted at the front end of the stand (211), a detection head (213) being mounted at the output end of the first cylinder (212), a control panel (214) being mounted at one side of the front end of the stand (211), and a pick-and-place mechanism (4) being arranged on the first cylinder (212) and being used to pick-and-place a pressure sensor; The moving assembly (22) comprises a bottom plate (221) slidably mounted on the top of the base (1).

5. A pressure sensor calibration device according to claim 4, characterized in that: The moving assembly (22) further comprises a second cylinder (222) installed at the rear end of the top of the base (1), and the output end of the second cylinder (222) is connected to the bottom plate (221).

6. A pressure sensor calibration device according to claim 4, characterized in that: The pick-and-place mechanism (4) comprises a y-axis electric slide (41) fixed at the front end of a first cylinder (212), a z-axis electric slide (42) being mounted on a slider of the y-axis electric slide (41), a pneumatic clamp (43) being mounted on a slider of the z-axis electric slide (42), and clamping plates (44) being fixed on both side clamps of the pneumatic clamp (43).

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