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Pressure transmitter based on laser resistance-adjusting temperature compensation technology

A technology of temperature compensation and laser resistance adjustment, which is applied in the direction of fluid pressure measurement, fluid pressure measurement, and instruments using liquid as a pressure-sensitive medium, and can solve problems such as inaccurate pressure sensing values ​​of pressure sensors and errors in pressure measurement

Inactive Publication Date: 2021-03-12
陕西航宇星测科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problem of inaccurate pressure sensing value of the pressure sensor and error in pressure measurement due to thermal expansion and contraction of silicone oil when the temperature of the liquid changes in the prior art. Pressure transmitter with resistance temperature compensation technology

Method used

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  • Pressure transmitter based on laser resistance-adjusting temperature compensation technology
  • Pressure transmitter based on laser resistance-adjusting temperature compensation technology
  • Pressure transmitter based on laser resistance-adjusting temperature compensation technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1, with reference to Figure 1-4 , the pressure transmitter based on laser trimmed resistance temperature compensation technology includes a fixed pipe 1, the top of the fixed pipe 1 is fixedly connected with a connecting pipe 2, both ends of the fixed pipe 1 are connected with flanges 12, and the connecting pipe 2 A pressure sensor 3 is fixedly connected inside, the connecting pipe 2 is connected with an isolation diaphragm 5 through a connecting mechanism 4, the end of the connecting pipe 2 far away from the fixed pipe 1 is connected with a controller 6, and the connecting pipe 2 is filled with silicone oil;

[0026] Connection mechanism 4 comprises two supporting blocks 401, threaded rod 402, driving motor 403, moving block 404, threaded hole 405, fixed cylinder 406, fixed ring 407, oil tank 408, oil pipe 409, electric control telescoping rod 410, piston 411 and temperature Inductor 412, two support blocks 401 are fixedly connected on the inner tube wall o...

Embodiment 2

[0027] Embodiment 2 is on the basis of embodiment 1 such as Figure 4 As shown, the outer wall of its fixed cylinder 406 away from the moving block 404 is fixedly connected with a T-shaped slider 7, and the inner tube wall of the connecting pipe 2 corresponding to the position of the T-shaped slider 7 is provided with a T-shaped chute 8, T Type slide block 7 is slidably connected in T-shaped chute 8, makes fixed cylinder 4016 more stable, is difficult for shaking.

Embodiment 3

[0028] Embodiment 3 is such as on the basis of embodiment 2 Figure 4 As shown, the end of its T-shaped slider 7 close to the bottom of the T-shaped chute 8 is provided with a ball groove 9, and the ball groove 9 is rollingly connected with a ball 10, and the end of the ball 10 away from the groove bottom of the ball groove 9 passes through the ball groove. The notch of 9 is also rollingly connected to the bottom of the T-shaped chute 8, so that the T-shaped slide block 7 moves more smoothly and is not easy to block.

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Abstract

The invention relates to the technical field of pressure transmitters, and discloses a pressure transmitter based on a laser resistance-adjusting temperature compensation technology, and the pressuretransmitter comprises a fixed pipe, the top of the fixed pipe fixedly communicates with a connecting pipe, two ends of the fixed pipe are connected with flange plates, and the connecting pipe is internally and fixedly connected with a pressure sensor. The connecting pipe is connected with an isolation diaphragm through a connecting mechanism, the connecting pipe is far away from the fixed pipe andconnected with a controller, the connecting pipe is filled with silicone oil, the connecting mechanism comprises two supporting blocks, a threaded rod, a driving motor, a moving block, a threaded hole, a fixed cylinder, a fixed ring, an oil tank, an oil pipe, an electric control telescopic rod, a piston and a temperature sensor, and the supporting blocks are fixedly connected to one side of the connecting pipe. According to the invention, when the silicone oil expands with heat and contracts with cold, part of the silicone oil can be extracted or supplemented, and the space between the pressure sensor and the isolation diaphragm is filled with the silicone oil, so that the silicone oil does not influence the pressure sensing value of the pressure sensor due to expansion with heat and contraction with cold, and pressure sensing is more accurate.

Description

technical field [0001] The invention relates to the technical field of pressure transmitters, in particular to a pressure transmitter based on laser resistance adjustment temperature compensation technology. Background technique [0002] A pressure transmitter is a device that converts pressure into a pneumatic signal or an electric signal for control and remote transmission. It can convert physical pressure parameters such as gas and liquid felt by the load cell sensor into a standard electrical signal for supply Indicating alarms, recorders, regulators and other secondary instruments are used for measurement, indication and process regulation. The pressure transmitter uses liquid pressure to make the isolation diaphragm move and deform. The pressure sensor senses pressure through silicone oil. [0003] After searching, the Chinese Patent Publication No. CN208383374U discloses a pressure transmitter, which improves the overall performance of the pressure transmitter, has th...

Claims

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Application Information

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IPC IPC(8): G01L19/04G01L7/18
CPCG01L7/18G01L19/04
Inventor 张拴祥
Owner 陕西航宇星测科技有限公司
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