Dynamic high-pressure calibration device of flat type pressure sensor

Abstract

The invention discloses a dynamic high-pressure calibration device of a flat type pressure sensor. The dynamic high-pressure calibration device of the flat type pressure sensor comprises a drop hammer hydraulic type high-pressure generating device and a sealed loading device of the flat type pressure sensor, wherein the drop hammer hydraulic type high-pressure generating device comprises a motor assembly, a support assembly, a steel wire rope, a magnet assembly, a heavy hammer, a pressure generator assembly and a standard pressure sensor. The sealed loading device of the flat type pressure sensor comprises a counter-force support, a calibration base, hydraulic oil, a sealing pad, the calibrated flat type pressure sensor, a pressing block, a jack and an oil pump. The hydraulic oil in a cavity of the pressure generator assembly is communicated with the hydraulic oil in a cavity of the calibration base through a connecting pipe, and pressure generated by the pressure generator assembly is transferred to the pressure sensing face of the calibrated flat type pressure sensor through the hydraulic oil delivery connecting pipe. The dynamic high-pressure calibration device of the flat type pressure sensor can achieve dynamic high-pressure calibration of the flat type pressure sensor by adopting the sealed loading device based on a drop hammer hydraulic calibration method.

Description

technical field [0001] The invention belongs to the technical field of measurement and testing, and in particular relates to a dynamic high-voltage calibration technology and device for a flat pressure sensor. Background technique [0002] In engineering protection, weapon development, explosion mechanics and other research fields, it is often necessary to carry out dynamic high pressure measurement of hundreds of MPa. Large-range pressure sensors used in these occasions must be calibrated before on-site measurement to obtain dynamic and static indicators such as sensitivity and frequency response of the sensor or the entire sensing system. For the commonly used pressure sensor with threaded structure, it can be directly connected to the base body of the pressure generator through the thread during calibration. However, in situations where it is inconvenient or impossible to use threaded structures for pressure measurement, such as explosion pressure measurements in rock so...

AI Technical Summary

Problems solved by technology

However, in situations where it is inconvenient or impossible to use threaded structures for pressure measurement, such as explosion pressure measurements in rock soil, concrete media, and other non-metallic materials, pressure sensors with flat structures are widely used. Due to the relationship between the shape of the sensor and the lead wire , how to apply pressure on the sensitive surface of the sensor during calibration has always been a difficult problem during calibration

At present, the inventor has not seen any device or research report that can be used for dynamic high pressure calibration of flat pressure sensors

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