Pressure sensing unit testing and calibrating device

Abstract

The utility model relates to the field of pressure sensing device manufacturing, in particular to a pressure sensing unit testing and calibrating device which comprises a machine table and a control module, a pressure regulating valve and a positioning device are arranged at the upper end of the machine table, and a testing assembly, a fixing device and a probe are arranged at the position of the positioning device. The pressure sensing element is placed at the positioning device and is fixed by the fixing device, and a pin of the pressure sensing element is in contact connection with the probe; the test assembly is connected with a pressure regulating valve, the pressure regulating valve is connected with a pressure gauge, and the pressure value displayed by the pressure gauge is consistent with the test pressure value of the test assembly. Through the arrangement of the plurality of pressure regulating valves, different pressure values are set for different pressure regulating valves, the pressure regulating valves can be started in sequence to detect the same pressure sensing element, and repeated pressure regulation is not needed; in addition, pressure sensing elements can be installed at the positions of the multiple positioning devices, and the multiple pressure sensing elements are sequentially detected through adjustment of the knob switch.

Description

Technical Field

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

[0002] The pressure sensor is a commonly used pressure detection element. The pressure sensor needs to be tested and calibrated before use to ensure the accuracy of the pressure tested by the pressure sensor. The detection of the pressure sensor is a time-consuming task.

[0003] The traditional testing method is to manually pressurize the pressure sensor device. After each fixed pressure test is completed, the pressure is adjusted again for testing. This process needs to be repeated many times according to different testing and calibration requirements. It is time-consuming and inefficient, and does not meet the requirements of large-scale and efficient automated production. Therefore, how to improve the efficiency of testing and calibration of pressure sensor devices is a problem that technicians in this field need to consider. Utility Model Content

[0004] The utility model aims to provide a pressure sensing unit testing and calibration device to solve the problems of low pressure sensing element detection and calibration efficiency in the prior art.

[0005] The technical solution of the utility model is: a pressure sensing unit testing and calibration device, comprising a machine platform and a control module, wherein a pressure regulating valve and a positioning device are arranged at the upper end of the machine platform, a test assembly, a fixing device and a probe are arranged at the positioning device, a pressure sensing element is placed at the positioning device and fixed by the fixing device, and a pin of the pressure sensing element is in contact with the probe;

[0006] The test assembly is connected to a pressure regulating valve, and a pressure gauge is connected to the pressure regulating valve. The pressure value displayed on the pressure gauge is consistent with the test pressure value of the test assembly.

[0007] Preferably, the pressure regulating valves are provided in plurality. During testing, the plurality of pressure regulating valves are set to different pressures, and the pressure sensing elements at the same positioning device are tested in sequence.

[0008] Preferably, the positioning device comprises a plurality of positioning pins, through which the pressure sensing element is positioned, and the plurality of positioning pins form a plurality of positioning modules to accommodate pressure sensing elements of various specifications.

[0009] Preferably, the test assembly includes a vertically arranged push rod, the upper end of which is connected to the pressure sensing element; the lower end is connected to a lifting device, and the driving force of the push rod driven upward by the lifting device is consistent with the indication of the pressure gauge.

[0010] Preferably, a plurality of button switches are arranged on the machine platform, and the plurality of button switches are connected to the control module, and the corresponding pressure regulating valves are controlled respectively by the button switches.

[0011] Preferably, a plurality of positioning devices are provided, and a knob switch is provided on the machine platform, and a plurality of gear positions of the knob switch correspond one-to-one to the plurality of positioning devices respectively.

[0012] Preferably, the probe is connected to a control module, and the pressure value of the pressure sensor can be displayed in real time on the control module end.

[0013] Compared with the prior art, the advantages of the utility model are:

[0014] (1) By setting multiple pressure regulating valves and setting different pressure values ​​for different pressure regulating valves, the pressure regulating valves can be started in sequence to detect the same pressure sensing element without repeated pressure adjustment; in addition, pressure sensing elements can be installed at multiple positioning devices, and multiple pressure sensing elements can be detected in sequence by adjusting the knob switch;

[0015] (2) When the real-time detection value displayed by the control module is inconsistent with the value of the pressure gauge of the pressure regulating valve, the pressure sensing element can be adjusted to make the control module and the pressure gauge value the same. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0017] Figure 1 This is a schematic diagram of the structure of the pressure sensing unit testing and calibration device of the utility model;

[0018] Figure 2 for Figure 1 Schematic diagram of the structure enlarged at point A in the middle.

[0019] Among them: machine 1, button switch 11, knob switch 12, pressure regulating valve 2, pressure gauge 21, positioning device 3, test assembly 4, driving ejector 41, fixing device 5, probe 6. DETAILED DESCRIPTION

[0020] The following is a further detailed description of the present invention in conjunction with specific embodiments:

[0021] like Figure 1-2 As shown, a pressure sensing unit testing and calibration device includes a machine 1 and a control module (not shown in the figure), a pressure regulating valve 2 and a positioning device 3 are arranged on the upper end of the machine 1, a test assembly 4, a fixing device 5 and a probe 6 are arranged at the positioning device 3, a pressure sensing element is placed at the positioning device 3 and fixed by the fixing device 5, and a pin of the pressure sensing element is in contact with the probe 6.

[0022] The test assembly 4 is connected to the pressure regulating valve 2, and the pressure regulating valve 2 is connected to a pressure gauge 21, and the pressure value displayed on the pressure gauge 21 is consistent with the test pressure value of the test assembly 4. The test assembly 4 includes a vertically arranged push rod 41, the upper end of which is connected to the pressure sensing element; the lower end is connected to a lifting device (not shown in the figure), and the lifting device can be a pneumatic lifting device. The driving force of the lifting device to drive the push rod 41 upward is consistent with the indication of the pressure gauge 21. The probe 6 is connected to the serial port module (not shown in the figure) provided on the machine 1, and the serial port module is connected to the control module (not shown in the figure) through a data line. The pressure value of the pressure sensing element can be displayed in real time through the display on the control module. At the same time, the control module can adjust the pressure parameters of the pressure sensing element through the probe 6.

[0023] In this embodiment, there are multiple pressure regulating valves 2. During the test, the pressure sensing element is first placed on the positioning pin 31 and fixed by the fixing device 5. At this time, the pin of the pressure sensing element is in contact with the probe 6. Multiple pressure regulating valves 2 are set with different preset pressures. At this time, the pressure gauge 21 connected to the pressure regulating valve 2 displays the preset pressure value. Multiple button switches 11 are provided on the machine 1, and the button switches 11 are electrically connected to the control module. The multiple button switches 11 correspond to the multiple pressure regulating valves 2 respectively, that is, when the test is performed, the pressure sensing element is installed at the positioning device 3, and the multiple pressure regulating valves 2 are set with different pressure values ​​in turn. The button switches 11 corresponding to the pressure regulating valves 2 are pressed in turn; the push rod 41 is driven upward by the lifting device to apply the corresponding pressure to the pressure sensing element; the pressure detected by the pressure sensing element displayed on the display of the control module is observed. After the pressure detection of multiple pressure regulating valves 2, if they are all the same as the pressure values ​​on the corresponding pressure gauge 21, it means that the pressure sensing element is qualified. If there are different values, the pressure sensing element can be reset through a control mechanism (not shown in the figure) so that the corresponding data are the same.

[0024] There are multiple positioning devices 3, and each positioning device 3 is provided with multiple positioning pins 31. The positioning pins 31 can be freely combined in various ways to form multiple positioning modules to be suitable for pressure sensing elements of different specifications. A knob switch 12 is provided on the machine 1, and the multiple gears of the knob switch 12 correspond to the multiple positioning devices 3 one by one. When it is necessary to detect the pressure sensing elements on different positioning devices 3, it is only necessary to rotate the knob switch 12 to the corresponding gear.

[0025] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, so it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the utility model.

Claims

1. A pressure sensing unit testing and calibration device, characterized in that: It includes a machine and a control module, wherein a pressure regulating valve and a positioning device are arranged at the upper end of the machine, a test assembly, a fixing device and a probe are arranged at the positioning device, a pressure sensing element is placed at the positioning device and fixed by the fixing device, and a pin of the pressure sensing element is in contact with the probe; The test assembly is connected to a pressure regulating valve, and a pressure gauge is connected to the pressure regulating valve. The pressure value displayed on the pressure gauge is consistent with the test pressure value of the test assembly.

2. A pressure sensing unit testing and calibration device according to claim 1, characterized in that: There are multiple pressure regulating valves. During testing, different pressures are set for the multiple pressure regulating valves, and the pressure sensing elements at the same positioning device are tested in sequence.

3. A pressure sensing unit testing and calibration device according to claim 1, characterized in that: The positioning device includes a plurality of positioning pins, and the pressure sensing element is positioned by the positioning pins. The plurality of positioning pins form a plurality of positioning modules, which are suitable for pressure sensing elements of various specifications.

4. A pressure sensing unit testing and calibration device according to claim 1, characterized in that: The test assembly includes a vertically arranged push rod, the upper end of which is connected to a pressure sensing element; the lower end is connected to a lifting device, and the driving force of the push rod driven upward by the lifting device is consistent with the indication of the pressure gauge.

5. A pressure sensing unit testing and calibration device according to claim 1, characterized in that: The machine platform is provided with a plurality of button switches, which are connected to the control module, and the corresponding pressure regulating valves are controlled respectively by the button switches.

6. A pressure sensing unit testing and calibration device according to claim 1, characterized in that: There are multiple positioning devices, and a knob switch is provided on the machine platform, and multiple gears of the knob switch correspond to the multiple positioning devices one by one.

7. A pressure sensing unit testing and calibration device according to claim 1, characterized in that: The probe is connected to a serial port module arranged on the machine platform, the serial port module is connected to a control module, and the pressure value of the pressure sensor can be displayed in real time on the control module end.

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