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Micro temperature-compensating servo circuit for quartz accelerometer

A technology of accelerometer and servo circuit, applied in speed/acceleration/shock measurement, acceleration measurement, measurement device, etc., which can solve problems such as acceleration measurement deviation, error, and impact on acceleration test accuracy, and achieve the effect of improving test accuracy

Active Publication Date: 2014-09-17
EAST CHINA INST OF OPTOELECTRONICS INTEGRATEDDEVICE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the difference in the use environment and working hours, the ambient temperature has a greater impact on the accelerometer, which will inevitably cause certain errors, so that when used in some areas and environments, the measurement of the acceleration will deviate, thus affecting the acceleration. test accuracy

Method used

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  • Micro temperature-compensating servo circuit for quartz accelerometer

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Embodiment 1

[0017] Embodiment one: see attached figure 1 shown.

[0018] A small temperature-compensated quartz accelerometer servo circuit for matching quartz flexible accelerometers. It includes a servo circuit, a temperature sensor to detect the temperature of the operating environment of the quartz flexible accelerometer.

[0019] The servo circuit includes a power supply part, a differential capacitance detection part connected to the quartz flexible accelerometer, a pre-amplification part connected to the differential capacitance detection part, a transconductance amplification part connected to the pre-amplification part, and a The correction network part of the negative feedback closed-loop system is formed between the transconductance amplification part and the preamplification part. The output end of the transconductance amplification part is connected with the electromagnetic torquer of the quartz flexible accelerometer.

[0020] The input terminal of the temperature sensor ...

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Abstract

The invention relates to a micro temperature-compensating servo circuit for a quartz accelerometer for being matched with a quartz flexure accelerometer. The micro temperature-compensating quartz accelerometer servo circuit comprises a servo circuit, wherein the servo circuit further comprises a temperature sensor for detecting working environment temperature of the quartz flexure accelerometer. The servo circuit is provided with a temperature sensor, so that the servo circuit can detect the real environment temperature of the quartz accelerometer and output a current signal which is in direct proportion to the environment temperature to a following signal processing unit for compensating and correcting so as to reduce the influence of environment temperature on the accelerometer and improve the test accuracy of the accelerometer.

Description

technical field [0001] The invention relates to a thick-film servo circuit applied to a quartz flexible accelerometer, in particular to an integrated thick-film servo circuit in which the quartz flexible accelerometer adds an ambient temperature detection function and outputs accurate values ​​for compensation and correction. circuit. Background technique [0002] At present, for the test of higher precision acceleration, the quartz flexible accelerometer is mainly used. Its matching servo circuit is mainly composed of discrete components, PCB board level and thick film integrated circuit. Among them, the circuit and accelerometer using thick film integration can be assembled together, making the system smaller and more reliable. [0003] However, due to the difference in the use environment and working hours, the ambient temperature has a greater impact on the accelerometer, which will inevitably cause certain errors, so that when used in some areas and environments, the m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01P15/00
Inventor 卢剑寒李波聂月萍张剑周峻霖刘鹏
Owner EAST CHINA INST OF OPTOELECTRONICS INTEGRATEDDEVICE