Pressure sensor for multi-way valve accelerated life test

Abstract

The invention discloses a pressure sensor for a multi-way valve accelerated life test. The pressure sensor comprises a base, wherein a supporting block is arranged in the base; a wafer is arranged above the supporting block; an electrode interlayer is arranged above the wafer; the upper end of the base is sleeved with a shell; a mass block is arranged above the electrode interlayer; the supportingblock comprises a lower connecting block and an upper connecting block; a dehumidification box is arranged between the lower connecting block and the upper connecting block; a base connecting base isarranged outside the upper end of the base; and sealing pads are arranged on the inner sides of the upper end of the base connecting base and the lower end of the shell. The dehumidification box is arranged to contain a drying agent to absorb moisture in the sensor, and therefore the service life of the pressure sensor is effectively prolonged; and meanwhile, the dehumidification box and the supporting block are in limiting connection through an upper limiting ring and a lower limiting ring, and therefore the dehumidification box can be replaced.

Description

Technical field[0001]The invention belongs to the technical field of sensors, and more specifically, relates to a pressure sensor for accelerated life test of a multi-way valve.Background technique[0002]The accelerated life test of the multi-way valve is to test the service life of the multi-way valve through the test. The accelerated life test refers to the use of statistical models related to the physical failure law on the basis of reasonable engineering and statistical assumptions. The reliability information obtained in the accelerated environment is converted to obtain a reproducible numerical estimation of the reliability characteristics of the specimen under the rated stress level. The accelerated life test adopts accelerated stress to carry out the life test of the specimen, thereby shortening the test time, improving the test efficiency, and reducing the test cost. Its research makes it possible to evaluate the reliability of high-reliability and long-life products. Accord...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the above-mentioned deficiencies in the background technology, to provide a multi-way valve accelerated life test pressure sensor, to solve the problem that part of the voltage material used in the piezoelectric pressure sensor proposed in the above-mentioned background technology should not be wet, so it needs A series of moisture-proof measures are taken in a complete set, which increases the cost of use

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