Pressure sensor with double redundancies and high reliability

Abstract

The invention relates to a pressure sensor with double redundancies and high reliability, which comprises a pressure conversion joint, two silicon pressure sensitive cores, two compensation circuits of the silicon pressure sensitive cores, two electric signal amplification processing boards, a stainless steel shell, an electric connector and potting silica gel, wherein the two silicon pressure sensitive cores are welded in the pressure conversion joint; the two compensation circuits of the silicon pressure sensitive cores are respectively connected with the two silicon pressure sensitive cores through connecting cables; the two electric signal amplification processing boards are respectively connected with output signals of the two compensation circuits of the silicon pressure sensitive cores; processing signals of the electric signal amplification processing boards are transmitted out from the aerial electric connector through the output ends of the circuits; the pressure conversion joint, the stainless steel shell and the aerial electric connector are welded into a whole body; and the silica gel is potted in the whole body. The invention has the advantages of small volume, light weight, full stainless steel watertight structure, pressure resistance, salt mist prevention, electromagnetic interference resistance, overpressure impact resistance, high frequency response, high comprehensive precision, small temperature error and the like.

Description

technical field [0001] The invention relates to a double-redundancy high-reliability pressure sensor for measuring the fluid pressure of aircraft and special machine oil supply system, lubrication system, hydraulic system, gas compression system, etc. The measurement medium is gas, hydraulic oil and other fluids, which belongs to the pressure sensor technology field. Background technique [0002] In the current aircraft, special machines and key control processes, there are many pressure physical quantities measured in the fuel supply system, lubrication system, hydraulic system, and gas compression system; conventional pressure sensors can only perform a single measurement of the system under test. Due to the importance of measurement, safety and reliability requirements, it is usually required to install two pressure sensors at the same pressure point to ensure that when one pressure sensor fails, the other can work normally, because the two sensors exist Due to the diffe...

AI Technical Summary

Problems solved by technology

[0002] In the current aircraft, special machines and key control processes, there are many pressure physical quantities measured in the fuel supply system, lubrication system, hydraulic system, and gas compression system; conventional pressure sensors can only perform a single measurement of the system under test

Due to the importance of measurement, safety and reliability requirements, it is usually required to install two pressure sensors at the same pressure point to ensure that when one pressure sensor fails, the other can work normally, because the two sensors exist Due to the difference in performance, and due to the different positions installed in the measurement system, the result will bring systematic errors to the measurement; and the installation space requirement is relatively large; this requires a dual-redundant high-reliability pressure sensor

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