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High-temperature resistant quartz flexure accelerometer

An accelerometer and high temperature resistant technology, applied in the direction of measuring acceleration, speed/acceleration/shock measurement, measuring devices, etc., can solve the problems of poor output signal stability, large temperature coefficient of products, and failure to meet the requirements of use, so as to improve stability , good shock resistance

Active Publication Date: 2016-12-14
保定开拓精密仪器制造有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing high-temperature-resistant quartz flexible accelerometers usually have high temperature resistance between 150°C and 180°C, but the temperature coefficient of the product is too large, usually reaching above 1000ppm / °C, and once it exceeds 150°C, the stability of the output signal of the product is poor and cannot meet the requirements. Requirements

Method used

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  • High-temperature resistant quartz flexure accelerometer
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  • High-temperature resistant quartz flexure accelerometer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1 high temperature resistant quartz flexible accelerometer

[0029] See attached figure 1 , the high temperature resistant quartz flexible accelerometer of the present invention comprises meter head 1 and servo circuit 2, meter head 1 and servo circuit 2 form electric connection by wire welding, the shell of servo circuit 2 and the shell 101 of meter head 1 pass laser welding machine Welded together to form a complete machine. The servo circuit 2 is a hybrid integrated circuit.

[0030] The watch head 1 includes a watch core 103, a housing 101 and an isolation ring 102. The watch core 103 is bonded with an isolation ring 102 with a 180°C high temperature resistant adhesive 104, and the isolation ring 102 is fixed to the housing 101 by bonding the 180°C high temperature resistant adhesive 104. Inside.

[0031] The watch movement 103 includes a quartz pendulum assembly, an upper torquer and a lower torquer, the quartz pendulum assembly is placed between the ...

Embodiment 2

[0037] Example 2 Detection of High Temperature Resistance of High Temperature Resistant Quartz Flexible Accelerometer

[0038] The test samples are the high temperature resistant quartz flexible accelerometer of embodiment 1 and the original product.

[0039] The two products in Table 1 are the test data of the original high temperature accelerometer of our company.

[0040] The two products in Table 2 are 4308-006 and 4308-007 in Table 1. Dissect and disassemble the meter head part, and replace the magnetic steel used in the upper and lower torque devices with the changed composition. The rest of the production process and testing methods have not changed. Among them, the original 4308-006 corresponds to the new product number 4312-0006, and the original 4308-007 corresponds to the new product number 4312-0007.

[0041] Detection method:

[0042] Refer to the test method and test data calculation method in 6.3.4 "Four-point overturn test" in the "GJB 1037A Single-axis pendu...

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Abstract

The invention discloses a high-temperature resistant quartz flexure accelerometer, and the flexure accelerometer comprises a meter head and a servo circuit, wherein the meter head and the servo circuit are welded through a wire to form electrical connection. The housing of the servo circuit and the meter head are welded through a laser welding machine to form an integrated machine. The meter head comprises a meter core, a housing, and an isolating ring. The meter core comprises a quartz swinging piece assembly, an upper torquer, and a lower torquer. The upper and lower torquers respectively comprise a magnetic steel, which is a samarium cobalt magnetic steel, wherein the mass ratio of all elements in the samarium cobalt magnetic steels (samarium: cobalt: ferrum: copper: zirconium: praseodymium) is 2: 25: 1.5: 0.1: 0.05: 0.08. According to the invention, the flexure accelerometer can enable the resisted temperature of the flexure accelerometer to be increased to 180 DEG C, and the temperature coefficient of a scale factor (K1) of the flexure accelerometer is controlled to be less than 200ppm / DEG C. Moreover, the flexure accelerometer can work under 200 DEG C for at least four hours.

Description

technical field [0001] The invention relates to the technical field of high-precision measuring instruments, in particular to a high-temperature resistant quartz flexible accelerometer. Background technique [0002] Quartz flexible accelerometer is a force feedback accelerometer, which is most sensitive to physical quantities such as acceleration, speed, distance, swing, tilt, vibration, etc. It is a sensor sensitive to acceleration and one of the important components of inertial navigation system. [0003] The quartz flexible accelerometer consists of a meter head assembly and a servo circuit to form a closed-loop feedback system. It works according to Newton's laws of mechanics, and indirectly measures the acceleration of the carrier by measuring the inertial force on the carrier. The meter head assembly includes three parts: the detection mass assembly, the upper torquer assembly and the lower torquer assembly. The proof-mass assembly consists of a coated quartz swing pl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P15/125
CPCG01P15/125
Inventor 罗定稳
Owner 保定开拓精密仪器制造有限责任公司
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