Temperature compensation method and system of microchip tracer

Abstract

The present invention discloses a temperature compensation method and system of a microchip tracer. The method comprises the steps of: obtaining shaft temperature and pressure which are acquired by the microchip tracer in real time; at the current correction time, obtaining a frequency correction parameter set and a pressure correction parameter set which are both corresponding to the temperature from a calibration database; determining actual frequency according to the temperature and the frequency correction parameter set; determining actual pressure according to the temperature, the pressure and the pressure correction parameter set; and determining actual time corresponding to the current correction time according to the actual frequency determined at the current correction time, local frequency of a crystal oscillator in the microchip tracer, a set correction time interval and actual time corresponding to the last correction time. The purpose of performing temperature compensation for pressure acquired by the microchip tracer and time recorded by the microchip tracer without increasing hardware resources is achieved, and the temperature compensation method and system has the characteristics of high reliability and low cost.

Description

technical field [0001] The invention relates to the technical field of oil drilling data detection devices, in particular to a temperature compensation method and system for a microchip tracer. Background technique [0002] Pressure sensors and crystal oscillators are commonly used devices in the development of petroleum instruments, such as downhole pressure gauges and pulse clock signal sources. Both the pressure sensor and the crystal oscillator will be affected by temperature drift, which will cause deviations in the output results. For the case of large changes in the downhole ambient temperature (for example, 0-150°C), this deviation cannot be ignored. Therefore, it is necessary to perform temperature compensation on the above two devices according to the change of temperature, so as to ensure that the output pressure and time errors are reduced to the minimum range. [0003] At present, the temperature compensation method of silicon piezoresistive pressure sensors is...

AI Technical Summary

Problems solved by technology

Due to the large temperature change in the wellbore, the pressure collected by the microchip tracer and the recorded time will be affected by the temperature change and be inaccurate

Implementing the temperature compensation method of the pressure sensor and the crystal oscillator separately through the above two hardware circuits will increase the area and power consumption of the microchip tracer circuit design, so it is not the best temperature compensation method

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