Precise metal zero-length spring temperature coefficient measuring instrument and method thereof

Abstract

The invention discloses a precise metal zero-length spring temperature coefficient measuring instrument and a method thereof, and relates to a performance testing technology of geoscientific instrument core components. According to the measuring instrument, a shell unit is internally provided with an outer heat insulating layer, an outer constant temperature tank, an inner heat insulating layer, a metal Dewar flask and an inner constant temperature tank from outside to inside; a temperature control system arranged outside the shell unit is connected with the outer constant temperature tank and the inner constant temperature tank; a mechanical sensitive probe unit is arranged in the inner constant temperature tank, and a zero-length spring is arranged in the mechanical sensitive probe unit. The measuring instrument can truly simulate the using environment of the zero-length spring, so that the temperature coefficients of the spring can be more precisely and truly measured; the repeatability rate is high, the stability is good and the interference from outside environment is extremely small; the human intervention is less, and the measurement efficiency is improved; the measuring instrument is suitable for measurement of precise metal zero-length spring temperature coefficients.

Description

technical field [0001] The invention relates to performance detection technology of core components of geoscience instruments, in particular to a precision metal zero-length spring temperature coefficient measuring instrument and a method thereof. Background technique [0002] Accurately measuring the acceleration of gravity and its variation plays an important role in the fields of resource exploration, national defense construction and earth science research. High-precision elastic components are now widely used in precision instruments, meters and precision machinery, among which metal zero-length springs are successfully used in gravimeters to accurately measure the acceleration of gravity. The metal zero-length coil spring produced by special processing technology has relatively small size and high sensitivity, can overcome the lateral disturbance of dynamic measurement, and has a very small amount of creep relaxation. It is an ideal elastic element for gravity measurem...

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Problems solved by technology

In recent years, researchers from the Institute of Surveying and Geophysics, Chinese Academy of Sciences have done systematic research on the development of metal zero-length springs, and their comprehensive properties such as creep and zero drift have also met the design requirements, but the temperature coefficient of zero-length springs The measurement is always at a relatively primitive level, and its measurement method is limited to using the air conditioner to control the temperature chan...

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