Production detection device for pressure sensor

Abstract

The utility model relates to the field of precision detection of pressure sensors, and discloses a production detection device for pressure sensors, which comprises a base and a cylinder fixedly connected with the upper side of the base, the upper side of the base is fixedly connected with a fixed plate, one side of the fixed plate is rotatably connected with a first gear, and one side of the first gear is fixedly connected with a threaded rod. One side of the fixing plate is provided with a gear variable speed control mechanism for controlling the rotating speed of the first gear, the inner side of the air cylinder is provided with a precise air control mechanism for controlling the air pressure change in the air cylinder, and one end of the air cylinder is provided with a high-pressure inflation tank mechanism for injecting air into the air cylinder and keeping the initial pressure intensity. According to the utility model, through the arrangement of the second gear and the first gear which are different in radius, a relatively precise propelling effect is realized, a better air pressure change difference can be created, and the pressure sensor testing device has relatively high practicability.

Description

Technical Field

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

[0002] After the pressure sensor is assembled and before it is put on the market, it needs to be calibrated in detail. If we do not calibrate it before use, various faults may occur during the measurement process, or the measurement results may be inaccurate. The existing pressure sensor accuracy detection device has problems such as insufficient accuracy and poor controllability in air pressure regulation.

[0003] For example, a Chinese utility model patent with announcement number CN212779736U discloses a precision detection device for pressure sensor production. Although the scheme controls the air intake and exhaust of the piston plate in the cylinder through the cooperation between the reversing valve and the piston rod, the control accuracy of the movable rod pushing the piston plate forward is low, and there is no effective speed change control mechanism to push the piston plate forward, which is unable to perform high-precision measurement and control of pressure sensors. Based on this, a production detection device for pressure sensors is proposed. Utility Model Content

[0004] In order to solve the technical problem of pressure sensor accuracy detection, the utility model provides a production detection device for a pressure sensor.

[0005] The utility model is implemented by the following technical scheme: a production and detection device for a pressure sensor, comprising a base and a cylinder fixedly connected to the upper side thereof, a fixing plate fixedly connected to the upper side of the base, a No. 1 gear rotatably connected to one side of the fixing plate, a threaded rod fixedly connected to one side of the No. 1 gear, a gear speed change control mechanism for controlling the rotation speed of the No. 1 gear is arranged on one side of the fixing plate, a precision gas control mechanism for controlling the change of air pressure in the cylinder is arranged on the inner side of the cylinder, a high-pressure gas filling tank mechanism for injecting gas into the cylinder and maintaining the initial pressure is arranged at one end of the cylinder, and a sensor docking mechanism for docking the pressure sensor to be tested with the cylinder is arranged on the upper side of the cylinder.

[0006] As a further improvement of the above scheme, the gear speed change control mechanism includes a servo motor fixedly connected to one side of the fixed plate, and the output end of the servo motor is fixedly connected to a second gear that meshes with the first gear and is rotationally connected to one side of the fixed plate.

[0007] As a further improvement of the above scheme, the precision air control mechanism includes a piston threadedly connected to one end of the threaded rod and slidably connected to the inner side of the cylinder. A flange is fixedly connected to one side of the cylinder, and a piston limiting mechanism is provided on one side of the flange for limiting the movement of the piston along the inner side of the cylinder.

[0008] As a further improvement of the above solution, the piston limiting mechanism includes a plurality of limiting rods arranged between the flange and the fixed plate, and a plurality of connecting plates fixedly connected to the side of the piston and slidably connected to one side of the limiting rods respectively.

[0009] As a further improvement of the above solution, the high-pressure gas charging tank mechanism includes a high-pressure gas charging tank fixedly connected to the upper side of the base, a digital pressure gauge arranged on the upper side of the high-pressure gas charging tank, and a solenoid valve communicated with one side of the high-pressure gas charging tank and communicated with one end of the cylinder.

[0010] As a further improvement of the above solution, the sensor docking mechanism includes a plurality of sensor docking valves fixedly connected to the upper side of the cylinder.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] 1. Through the mutual cooperation of the second gear, the first gear, the threaded rod and the piston, the present utility model drives the large-radius first gear with the small-radius second gear, and can obtain a more precise speed control ability. Then, through the threaded sleeve engagement between the threaded rod and the piston, the precision of the piston pushing the cylinder is further improved, and a wider range of air pressure regulation is realized.

[0013] 2. Through the mutual cooperation of the cylinder and the sensor docking valve, the present utility model can seal and fix different types of pressure sensors through the sensor docking valve, and then start the servo motor to control the internal air pressure change, and observe whether the data of the pressure sensor is consistent with that of the digital pressure gauge, so as to achieve the effect of precision detection, and the operation is simple, intuitive and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The front view of a production detection device for a pressure sensor provided by the present utility model;

[0015] Figure 2 The side view of a production detection device for a pressure sensor provided by the present utility model;

[0016] Figure 3 The top view of a production detection device for a pressure sensor provided by the present utility model.

[0017] MAIN SYMBOL DESCRIPTION:

[0018] 1. Base; 2. Cylinder; 3. Solenoid valve; 4. High-pressure gas charging tank; 5. Digital pressure gauge; 6. Sensor docking valve; 7. Flange; 8. Piston; 9. Connecting plate; 10. Limiting rod; 11. Threaded rod; 12. First gear; 13. Servo motor; 14. Second gear; 15. Fixed plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Next, in combination with the accompanying drawings and specific embodiments, the present utility model will be further described. It should be noted that, on the premise of no conflict, the following-described embodiments or technical features can be arbitrarily combined to form new embodiments.

[0020] Embodiment:

[0021] Please refer to Figures 1 - 3 , a production detection device for a pressure sensor in this embodiment includes a base 1 and a cylinder 2 fixedly connected to the upper side thereof. A fixed plate 15 is fixedly connected to the upper side of the base 1. One side of the fixed plate 15 is rotatably connected to a first gear 12. A threaded rod 11 is fixedly connected to one side of the first gear 12. A gear speed control mechanism for controlling the rotation speed of the first gear 12 is provided on one side of the fixed plate 15. A precision air control mechanism for controlling the air pressure change in the cylinder 2 is provided inside the cylinder 2. A high-pressure gas charging tank mechanism for injecting gas into the cylinder 2 and maintaining the initial pressure is provided at one end of the cylinder 2. A sensor docking mechanism for docking the pressure sensor to be tested with the cylinder 2 is provided on the upper side of the cylinder 2.

[0022] The gear speed control mechanism includes a servo motor 13 fixedly connected to one side of the fixed plate 15. The output end of the servo motor 13 is fixedly connected to a second gear 14 that meshes with the first gear 12 and is rotatably connected to one side of the fixed plate 15. It should be particularly noted that the radius of the second gear 14 is much smaller than the radius of the first gear 12.

[0023] The precision air control mechanism includes a piston 8 threadedly sleeved at one end of the threaded rod 11 and slidably connected to the inside of the cylinder 2. The piston 8 selects a steel lining structure inside, a composite rubber material outside, and an additional sealing material. A flange 7 is fixedly connected to one side of the cylinder 2. A piston limiting mechanism for moving the piston 8 along the inside of the cylinder 2 is provided on one side of the flange 7.

[0024] The piston limiting mechanism includes 4 limiting rods 10 provided between the flange 7 and the fixed plate 15. 4 connecting plates 9 are fixedly connected to the side of the piston 8 and are respectively slidably connected to one side of the limiting rods 10.

[0025] The high-pressure gas charging tank mechanism includes a high-pressure gas charging tank 4 fixedly connected to the upper side of the base 1. A digital pressure gauge 5 is provided on the upper side of the high-pressure gas charging tank 4. By using a digital pressure gauge, for a traditional mechanical pressure gauge, it is easy to have errors in reading by the human eye. One side of the high-pressure gas charging tank 4 is communicated with a solenoid valve 3 that is communicated with one end of the cylinder 2.

[0026] The sensor docking mechanism includes 3 sensor docking valves 6 fixedly connected to the upper side of the cylinder 2. The sensor docking valves 6 select connecting bases of different sizes and specifications and are internally provided with a sealing material, such as polytetrafluoroethylene, to increase airtightness.

[0027] In the embodiment of the present application, the implementation principle of a production detection device for a pressure sensor is as follows: Before detection, first connect the pressure sensor to the sensor docking valve 6, then pre-fill the inside of the cylinder 2 with a gas volume at an initial numerical pressure through the high-pressure gas charging tank 4, and then start the servo motor 13. The rotation of the second gear 14 drives the rotation of the first gear 12, indirectly driving the rotation of the threaded rod 11. Due to the limiting effect of the limiting rod 10 on the connecting plate 9 and the piston 8, the piston 8 will advance forward along the inner wall of the cylinder 2, driving a change in the internal air pressure of the cylinder 2.

[0028] The above-mentioned implementation manner is only the preferred implementation manner of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention belong to the protection scope required by the present invention.

Claims

1. A production and testing device for a pressure sensor, comprising a base (1) and a cylinder (2) fixedly connected to the upper side thereof, characterized in that: A fixing plate (15) is fixedly connected to the upper side of the base (1), one side of the fixing plate (15) is rotatably connected to a first gear (12), one side of the first gear (12) is fixedly connected to a threaded rod (11), one side of the fixing plate (15) is provided with a gear speed control mechanism for controlling the rotation speed of the first gear (12), the inner side of the cylinder (2) is provided with a precision gas control mechanism for controlling the change of the air pressure in the cylinder (2), one end of the cylinder (2) is provided with a high-pressure gas filling tank mechanism for injecting gas into the cylinder (2) and maintaining the initial pressure, and the upper side of the cylinder (2) is provided with a sensor docking mechanism for docking a pressure sensor to be tested with the cylinder (2).

2. A production and testing device for a pressure sensor as claimed in claim 1, characterized in that: The gear speed change control mechanism comprises a servo motor (13) fixedly connected to one side of a fixed plate (15), and an output end of the servo motor (13) is fixedly connected to a second gear (14) meshing with a first gear (12) and rotatably connected to one side of the fixed plate (15).

3. A production and testing device for a pressure sensor as claimed in claim 1, characterized in that: The precision air control mechanism comprises a piston (8) threadedly sleeved on one end of a threaded rod (11) and slidably connected to the inner side of a cylinder (2); a flange (7) is fixedly connected to one side of the cylinder (2); and a piston limiting mechanism for the piston (8) to move along the inner side of the cylinder (2) is provided on one side of the flange (7).

4. A production and testing device for a pressure sensor as claimed in claim 3, characterized in that: The piston limiting mechanism comprises a plurality of limiting rods (10) arranged between the flange (7) and the fixing plate (15), and a plurality of connecting plates (9) are fixedly connected to the side of the piston (8) and are respectively slidably connected to one side of the limiting rods (10).

5. A production and testing device for a pressure sensor as claimed in claim 1, characterized in that: The high-pressure gas filling tank mechanism comprises a high-pressure gas filling tank (4) fixedly connected to the upper side of the base (1), a digital pressure gauge (5) is arranged on the upper side of the high-pressure gas filling tank (4), and one side of the high-pressure gas filling tank (4) is connected to a solenoid valve (3) connected to one end of the cylinder (2).

6. A production and testing device for a pressure sensor as claimed in claim 1, characterized in that: The sensor docking mechanism comprises a plurality of sensor docking valves (6) fixedly connected to the upper side of the cylinder (2).

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