A low-temperature test bench for sensor equipment

Abstract

The invention discloses a low-temperature testboard of sensor equipment. The testboard is characterized by comprising a thermostat, an integrated tool bench and a pre-loading device; the thermostat isinternally provided with a liquid helium pool, and the integrated tool bench is positioned in the liquid helium pool; the pre-loading device comprises a vacuum tube, a transmission unit and a force loading control unit, the transmission unit is positioned in the vacuum tube, the force loading control unit is connected with the transmission unit and is in sealing connection with the vacuum tube, and the vacuum tube is in sealing connection with a top opening of the thermostat via a flange; and the outmost layer of the integrated tool bench includes a vacuum box, the vacuum box is in sealing connection with the vacuum tube of the pre-loading device, the vacuum box is internally provided with a test tool for installing the sensor equipment to be tested, and the transmission unit in the vacuum tube is connected with the test tool. According to the testboard, test is low in cost, high in efficiency and convenient to operate, and low-temperature sensor performance is easy to measure under continuous temperature change.

Description

technical field [0001] The invention relates to a low-temperature test bench for sensor equipment, which belongs to the technical fields of particle accelerator and superconducting low temperature. Background technique [0002] The sensor low temperature test bench is an important part of superconducting low temperature technology and equipment research. It is a test platform system composed of various materials. Its design working temperature is generally divided into several temperatures such as 80K, 4.2K and 2K. The main function is to test the performance of the sensor applied at low temperature, simulate the working state of the sensor at low temperature through the low temperature test platform, and analyze whether its performance meets the actual situation. Work requirements, provide technical reference for the actual engineering application of sensors; and can carry out research and development tests of new low temperature sensors and low temperature materials on thi...

AI Technical Summary

Problems solved by technology

[0008] (1) This thermostat has a large volume and requires a large amount of liquid helium for the test, which increases the cost of the test; there are many vacuum-sealed interfaces and the assembly is complicated; the cycle required for cooling and rewarming is long

Because this kind of test needs to inject liquid helium into the liquid helium tank of the superconducting cavity for cooling test, it is necessary to cool down the superconducting cavity, liquid helium tank, sensor installation and fixed structure, etc., resulting in an increase in the cost of liquid helium required for the test, and a shorter test cycle. Relatively long, and the cooling rate is difficult to control

[0009] (2) It is necessary to integrate low-temperature motors, piezoelectric ceramics, pressure sensors, etc. to meet the loading and monitoring conditions during the test, and the three low-temperature sensor devices cannot be tested separately;

[0010] (3) The loading force and displacement range of the sensor are limited: since the loading force of the sensor is provided by the superconducting cavity as a load, the elastic coefficient of the superconducting cavity is constant, and the stretching amount is limited. If the stretching displacement is too large, it will lead to superconducting plastic deformation

[0011] The above three points have affected the large-scale testing of cryogenic motors, piezoelectric ceramics and pressure sensors to a certain extent. The testing costs are high, the efficiency is low, and there are certain equipment safety hazards, which are not conducive to the large-scale development and application of superconducting accelerators.

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