Efficient sensor data flashing clamp

Abstract

The utility model discloses an efficient sensor data flashing clamp, which relates to the technical field of sensors and comprises a lower clamp, an upper clamp and a fixing component for fixing the upper clamp on the lower clamp from top to bottom. A plurality of mounting holes extending downwards from the top surface of the lower clamp are formed in the lower clamp, an air passage is arranged in the lower clamp, the air passage is communicated with the bottoms of the mounting holes, and the air inlet end of the air passage is connected with an air pump; a plurality of sealing holes extending upwards from the bottom surface of the upper clamp are formed in the upper clamp, and the sealing holes correspond to the mounting holes one to one; when the clamp is used, one end of the pressure detection end of the sensor is inserted into the mounting hole, the other end of the pressure detection end of the sensor is inserted into the sealing hole for sealing, air pressure input by the air pump is transmitted to the bottom end of the pressure detection end of the sensor from the air channel, and pressure supply to the pressure sensor is completed; and a plurality of pressure sensors can be calibrated at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, in particular to a highly efficient sensor data flashing fixture. 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. It is usually composed of a pressure sensitive element and a signal processing unit. According to different test pressure types, pressure sensors can be divided into gauge pressure sensors, differential pressure sensors and absolute pressure sensors.

[0003] At present, a urea air pressure sensor used for automobile exhaust treatment has a pressure detection end composed of a tube body that runs through from top to bottom. The sensor will be calibrated for sensor sensing and data before leaving the factory. During calibration, one end of the tube body at the pressure detection end needs to be sealed, and pressure is supplied to the tube body from the other end. Most of the fixtures used for sensor sensing and data calibration in the prior art can only clamp and calibrate one sensor at a time, and cannot adapt to the simultaneous calibration of multiple sensors, which is very inconvenient.

[0004] In view of this, an efficient sensor data flashing fixture is urgently needed. Summary of the invention

[0005] In view of the problems existing in the prior art, the utility model solves the problems with the following technical structure.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] An efficient sensor data flashing fixture comprises: a lower fixture, an upper fixture, and a fixing component for fixing the upper fixture on the lower fixture from top to bottom;

[0008] The lower fixture is provided with a plurality of mounting holes extending downward from the top surface of the lower fixture, and an air passage is provided in the lower fixture, the air passage is connected with the bottom of the plurality of mounting holes, and the air inlet end of the air passage is connected with the air pump;

[0009] The upper clamp is provided with a plurality of sealing holes extending upward from the bottom surface of the upper clamp, and the sealing holes correspond to the mounting holes one by one.

[0010] A further feature is that

[0011] The upper fixture includes a carrier and a cover plate, the cover plate is arranged on the top surface of the carrier, the sealing hole passes through the carrier, a sealing member is arranged on the top of the sealing hole, and a through hole passing through the upper fixture from bottom to top is opened on one side of each sealing hole of the upper fixture.

[0012] The sealing element is an O-type rubber ring, an annular cavity is arranged in the O-type rubber ring, and the annular cavity is filled with a liquid medium.

[0013] The cover plate is provided with a groove matching the O-type rubber ring just above each sealing hole.

[0014] The cover plate is made of transparent material.

[0015] The fixing assembly comprises a top head in contact with the upper clamp, and an elastic member is arranged between the top head and the upper clamp.

[0016] It also includes a plurality of blocking rods for temporarily blocking the mounting holes and the corresponding sealing holes, wherein the bottom end and the top end of the blocking rod are respectively arranged in a mounting hole and the corresponding sealing hole.

[0017] A pressure one-way valve is arranged at the air inlet end of the air passage.

[0018] The air outlet of the airway is provided with a pressure relief valve.

[0019] A sealing ring is arranged between the carrier and the cover plate.

[0020] The above structure of the utility model can achieve the following beneficial effects:

[0021] When in use, insert one end of the sensor pressure detection end into the mounting hole, and insert the other end into the sealing hole for sealing. The air pressure input by the air pump is transmitted from the airway to the bottom end of the sensor pressure detection end to complete the pressure supply to the pressure sensor. In addition, multiple mounting holes and multiple sealing holes are provided on the fixture, so multiple pressure sensors can be calibrated at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of this application;

[0023] Figure 2 It is a schematic diagram of the structure of the clamp in this application;

[0024] Figure 3 It is a structural cross-sectional view of the clamp in this application;

[0025] Figure 4 This is a schematic diagram of the structure of the position relationship between the O-type rubber ring and the pressure sensor in this application;

[0026] Figure 5 It is a structural cross-sectional view of the lower clamp in this application;

[0027] Figure 6 This is a schematic diagram of the structure of the cover plate in this application;

[0028] Figure 7 It is a schematic diagram of the structure of the blocking rod and the O-type rubber ring in this application.

[0029] In the figure: 1. air pump; 2. temperature control box; 3. fixture; 31. lower fixture; 32. fixing assembly; 33. mounting hole; 34. airway; 35. sealing hole; 36. carrier; 37. cover plate; 38. through hole; 39. groove; 4. O-ring; 5. top head; 6. blocking rod; 7. pressure check valve; 8. pressure relief valve. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0031] It should be noted that the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, apparatus, product or equipment comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or equipment.

[0032] The following is combined with Figure 1-7 This application is described in further detail.

[0033] Example 1, reference Figure 1-4 The sensor data flashing device shown in the figure comprises: an air pump 1, a temperature control box 2, a fixture 3 and a flashing device for flashing pressure sensor data, the fixture 3 is arranged in the temperature control box 2, the air pump 1 is used to supply pressure to the pressure sensor on the fixture, so that when in use, the pressure sensor is fixed in the temperature control box 2 by the fixture 3, the pressure sensor is supplied with pressure by the air pump 1, and the pressure sensor (the specific structure of the pressure sensor is as shown in FIG. 2 ) is made to be in a state of being ... Figure 4 The pressure sensor is placed at different temperatures (as shown by the mark A) (generally -40°C - 80°C) for sensor sensing and data calibration. The air pump 1 is used to place the pressure sensor at different pressures for sensor sensing and data calibration, thereby making the sensor sensing and data calibration more sufficient and improving the product qualification rate.

[0034] refer to Figure 2-5As shown, in order to improve the sensor calibration efficiency, the fixture 3 includes a lower fixture 31, an upper fixture and a fixing component 32 that fixes the upper fixture to the lower fixture 31 from top to bottom; the lower fixture 31 is provided with a plurality of mounting holes 33 extending downward from the top surface of the lower fixture 31, and an air duct 34 is provided in the lower fixture 31, the air duct 34 is connected with the bottom of the plurality of mounting holes 33, and the air inlet end of the air duct 34 is connected to the air pump 1; the upper fixture is provided with a plurality of sealing holes 35 extending upward from the bottom surface of the upper fixture, and the sealing holes 35 correspond to the mounting holes 33 one by one. In this way, a plurality of mounting holes 33 are provided on the lower fixture 31 and a plurality of sealing holes 35 are provided on the upper fixture. When in use, the sensor pressure One end of the detection end is inserted into the mounting hole 33, and the other end is inserted into the sealing hole 35 for sealing (the upper clamp is placed on the sensor from top to bottom). The air pressure input by the air pump 1 is transmitted from the airway 34 to the bottom end of the sensor pressure detection end (the end away from the sealing hole 35), thereby completing the pressure supply to the pressure sensor. In addition, a plurality of mounting holes 33 and a plurality of sealing holes 35 are provided on the clamp 3, so that a plurality of pressure sensors can be calibrated at the same time. The plurality of mounting holes 33 and the sealing holes 35 are optimally distributed in a rectangular row, wherein the fixing assembly 32 includes four quick-release structures, which are respectively placed at the four corners of the clamp 3 to fix the upper clamp on the lower clamp 31 and apply downward pressure to the upper clamp.

[0035] refer to Figure 3-6 As shown, in order to facilitate sealing, the upper fixture includes a carrier 36 and a cover plate 37. The cover plate 37 is arranged on the top surface of the carrier 36. The sealing hole 35 passes through the carrier 36. A sealing member is arranged on the top of the sealing hole 35. The upper fixture is provided with a through hole 38 that passes through the upper fixture from bottom to top on one side of each sealing hole 35. In this way, when in use, the carrier 36 is first installed on the sensor pre-placed on the lower fixture 31, and then the sealing member is placed on the top of the pressure detection end of the sensor, and then the cover plate 37 is placed on the carrier 36, so as to facilitate the accurate placement of the sealing member on the pressure detection end of the sensor. The top of the end can reduce the occurrence of seal deviation or falling off during the installation of the fixture. In order to facilitate the observation of the position of the seal after the cover 37 is installed, the cover 37 is made of transparent material, so that the state of the seal can be accurately observed, ensuring the sealing of the top end of the sensor pressure detection end. The top end seal is not only more convenient and has better sealing, but also convenient for plugging and unplugging the sensor (most of the existing technologies use waist sealing, that is, the upper half of the sensor pressure detection end is sealed as a whole), which improves the calibration efficiency of the sensor.

[0036] Further optimization is that, in order to improve the sealing performance of the clamp to the sensor when the temperature changes, the sealing member is an O-type rubber ring 4, and an annular cavity is provided in the O-type rubber ring 4. The annular cavity is filled with a liquid medium that freezes at low temperature. The liquid medium is preferably water. When it is at a low temperature (the lowest temperature can reach minus 40 degrees), the O-type rubber ring 4 will shrink. In order to reduce the deformation of the O-type rubber ring 4, by filling the O-type rubber ring 4 with liquid medium, when the temperature is low, the liquid medium freezes and the volume increases, which limits the deformation of the O-type rubber ring 4, thereby improving the sealing performance of the sensor. In addition, an O-type rubber ring 4 can be provided at the bottom end of the pressure detection end of the sensor to further improve the sealing performance and improve the accuracy of calibration. At the same time, in order to facilitate the positioning and installation of the O-type rubber ring 4 and improve the sealing performance, the cover plate 37 is provided with a groove 39 adapted to the O-type rubber ring 4 directly above each sealing hole 35, and the top of the O-type rubber ring 4 is embedded in the groove 39, which increases the contact area between the O-type rubber ring 4 and the upper clamp and improves the sealing performance.

[0037] refer to Figure 2-3 As shown, in order to avoid insufficient pressure of the fixing component 32 on the cover plate 37, resulting in a gap between the cover plate 37 and the carrier 36, thereby affecting the sealing, the fixing component 32 includes a top head 5 in contact with the upper clamp, and an elastic member is arranged between the top head 5 and the upper clamp. The elastic force of the elastic member is applied from top to bottom to the top of the cover plate 37 to provide pressure compensation, thereby ensuring the sealing between the cover plate 37 and the carrier 36, and a sealing ring is added between the cover plate 37 and the carrier 36 to further improve the sealing.

[0038] Further optimization is to refer to Figure 7 As shown, in order to improve the adaptability of the device, the fixture 3 also includes a plurality of blocking rods 6 for temporarily blocking the mounting holes 33 and the corresponding sealing holes 35, and the bottom end and the top end of the blocking rod 6 are respectively arranged in a mounting hole 33 and a corresponding sealing hole 35. In this way, when the number of sensors to be calibrated is less than the number of mounting holes 33 on the fixture 3, by supplementing the corresponding number of blocking rods 6, the two ends of the blocking rods 6 are respectively placed in the vacant mounting holes 33 and the sealing holes 35, so that the device can calibrate different numbers of sensors.

[0039] refer to Figure 5 As shown, a pressure check valve 7 is provided at the air inlet end of the airway 34, and a pressure relief valve 8 is provided at the air outlet of the airway 34. The pressure check valve 7 ensures that the air pressure in the airway 34 will not leak reversely, and the setting of the pressure relief valve 8 facilitates the rapid pressure relief of the airway 34 and the removal of the sensor.

[0040] In addition to the above embodiments, the present application also has a second embodiment, a sensor data flashing method based on the above embodiments, the steps comprising:

[0041] Insert one end of the pressure detection end of the sensor into the mounting hole 33;

[0042] Place the carrier 36 on the sensor on the upper fixture so that the connecting end of the sensor is inserted into the through hole 38 and the other end of the pressure detection end of the sensor is inserted into the sealing hole 35;

[0043] An O-type rubber ring 4 is placed on the top of the pressure detection end at each sealing hole 35;

[0044] Place the cover plate 37 on the stage 36;

[0045] Fix the upper fixture to the lower fixture 31 through the fixing assembly 32, and then check the position of the O-type rubber ring 4 placed on the top of the pressure detection end of the sensor through the cover plate 37;

[0046] The fixture 3 is placed as a whole in the temperature control box 2;

[0047] Supply air into the airway through the air pump 1 to adjust the air pressure value in the airway;

[0048] Adjust the temperature value in the box through the temperature control box 2;

[0049] The target temperature value is set through the temperature control box 2, and the air pressure value is continuously adjusted according to the air pressure change curve. The flash writing device writes the different air pressure values ​​corresponding to the target temperature into the sensor. For example, the temperature value in the temperature control box is set to -20 degrees, and the air pressure value in the airway is adjusted through the air pump 1. For example, it is adjusted to 5kPa, 10kPa, 15kPa, etc. in sequence, and 5kPa, 10kPa, and 15kPa are written into the sensor respectively under the condition of -20 degrees through the flash writing device, and then the target temperature value is adjusted again, and the air pressure value in the airway is adjusted by the air pump 1 again, and different air pressure values ​​are written into the sensor;

[0050] The temperature control box 2 is polled and adjusted to the target temperature value according to the air pressure change curve (one cycle is performed for each different air pressure value at the same target temperature value), and the flashing device flashes the different air pressure values ​​at the target temperature value into the sensor to complete the sensor data calibration.

[0051] In summary, when in use, the pressure sensor is fixed in the temperature control box 2 by the clamp 3, the pressure sensor is supplied with pressure by the air pump 1, the temperature controller 2 is used to place the pressure sensor at different temperatures for sensor sensing and data calibration, and the air pump 1 is used to place the pressure sensor at different pressures for sensor sensing and data calibration, thereby making the sensor sensing and data calibration more sufficient and improving the product qualification rate.

[0052] The above are only preferred embodiments of the present application, and the present invention is not limited to the above embodiments. It is understood that other improvements and changes directly derived or associated by those skilled in the art without departing from the spirit and concept of the present invention should be considered to be included in the protection scope of the present invention.

Claims

1. An efficient sensor data flashing fixture, characterized in that: include: A lower clamp (31), an upper clamp, and a fixing assembly (32) for fixing the upper clamp on the lower clamp (31) from top to bottom; The lower clamp (31) is provided with a plurality of mounting holes (33) extending downward from the top surface of the lower clamp (31), and an air passage (34) is provided inside the lower clamp (31), the air passage (34) is connected with the bottoms of the plurality of mounting holes (33), and an air inlet end of the air passage (34) is connected with an air pump; The upper clamp is provided with a plurality of sealing holes (35) extending upward from the bottom surface of the upper clamp, and the sealing holes (35) correspond to the mounting holes (33) one by one.

2. According to claim 1, an efficient sensor data flashing fixture is characterized in that: The upper clamp comprises a carrier (36) and a cover plate (37), wherein the cover plate (37) is arranged on the top surface of the carrier (36), the sealing hole (35) passes through the carrier (36), a sealing member is arranged on the top of the sealing hole (35), and a through hole (38) passing through the upper clamp from bottom to top is opened on one side of each sealing hole (35) of the upper clamp.

3. The efficient sensor data flashing fixture according to claim 2, characterized in that: The sealing element is an O-type rubber ring (4), an annular cavity is arranged inside the O-type rubber ring (4), and the annular cavity is filled with a liquid medium.

4. The efficient sensor data flashing fixture according to claim 3, characterized in that: The cover plate (37) is provided with a groove (39) adapted to the O-type rubber ring (4) just above each sealing hole (35).

5. The efficient sensor data flashing fixture according to claim 2, characterized in that: The cover plate (37) is made of a transparent material.

6. The efficient sensor data flashing fixture according to claim 1, characterized in that: The fixing assembly (32) comprises a top head (5) in contact with the upper clamp, and an elastic member is arranged between the top head (5) and the upper clamp.

7. The efficient sensor data flashing fixture according to claim 3, characterized in that: It also includes a plurality of blocking rods (6) for temporarily blocking the mounting holes (33) and the corresponding sealing holes (35), wherein the bottom end and the top end of the blocking rod (6) are respectively arranged in a mounting hole (33) and a corresponding sealing hole (35).

8. The efficient sensor data flashing fixture according to claim 1, characterized in that: A pressure check valve (7) is provided at the air inlet end of the air passage (34).

9. The efficient sensor data flashing fixture according to claim 1, characterized in that: The air outlet of the air passage (34) is provided with a pressure relief valve (8).

10. The efficient sensor data flashing fixture according to claim 2, characterized in that: A sealing ring is provided between the carrier (36) and the cover plate (37).

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