A pressure sensor temperature measurement method

Abstract

The invention relates to the field of measurement, in particular to a pressure sensor temperature measurement method, comprising the following steps: a piezoresistive pressure sensor diaphragm is directly in contact with a medium, and simultaneously collects pressure signals and temperature signals; and extracts expected parameters of the temperature signal frequency band expansion; Calculating frequency band extension filtering parameters according to the expected parameters; filtering the temperature signal point by point; storing the filtered data of the temperature signal back to the data storage module. The present invention uses a single sensor to complete the acquisition and measurement of temperature and pressure at the same time. Compared with the traditional downhole pressure gauge temperature measurement scheme, the temperature induction is faster, which ensures the synchronization of temperature and pressure measurement; the diaphragm of the pressure sensor is directly connected with the external medium The contact ensures the heat conduction efficiency of temperature measurement; the digital filtering of the temperature signal expands the temperature measurement frequency band and increases the temperature measurement capability for pressure gauges with large thermal inertia.

Description

technical field [0001] The invention relates to the measurement field, in particular to a pressure sensor temperature measurement method. Background technique [0002] For the field of downhole electronic downhole pressure gauges in oil and gas fields, the pressure gauges at home and abroad all need to measure the pressure quickly and accurately at the same time. [0003] Existing schemes for manometers to measure temperature all use independent temperature sensors. The temperature sensors are either set inside the manometer or integrated in the front probe. The temperature sensor is set on the internal circuit of the metal cavity of the pressure gauge. The external heat change needs to pass through the heat conduction of the medium and the pressure gauge shell, and the heat radiation of the air inside the shell can reach the temperature sensor. The temperature measurement requires heat conduction, and the induction lags; the temperature sensor Integrated with the front pro...

AI Technical Summary

Problems solved by technology

The temperature sensor is set on the internal circuit of the metal cavity of the pressure gauge. The external heat change needs to pass through the heat conduction of the medium and the pressure gauge shell, and the heat radiation of the air inside the shell can reach the temperature sensor. The temperature measurement requires heat conduction, and the induction lags; the temperature sensor Integrated with the front probe, temperature and pressure measurements still have asynchronous measurement, which affects the temperature drift correction accuracy of pressure

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