Heat conduction mechanism for temperature compensation test device of weighting transducer

Abstract

The invention relates to a thermal conduction mechanism of a weighting sensor temperature compensating testing device, which consists of two groups of conduction fastening devices symmetrically arranged on a test platform and having same structure, wherein each conduction fastening device comprises a base, a conduction board, a cooling plate, a fan, an air cylinder, a bracket and a spring, the air cylinder is arranged on the base, the piston rod of the air cylinder is connected with the rear part of the bracket, fastening pieces pass through supporting seats at two sides of the cooling plate to be connected in threaded holes at two sides of the bracket in a screwed way, and springs are also arranged between the supporting seats of the cooling plate and the bracket, the rear part of the cooling plate is provided with the fan, and the front end of the cooling plate is provided with the conduction board; two conduction boards on the two conduction fastening devices correspond to each other, and a distance a for placing a weighting sensor is left between the two conduction boards. The invention can enable the weighting sensor to quickly reach thermal equilibrium of tested temperature while carrying out temperature compensation test to the weighting sensor, thereby saving energy and greatly enhancing the test efficiency of the test.

Description

technical field [0001] The invention relates to a heat conduction mechanism of a weighing sensor temperature compensation testing device, belonging to the technical field of weighing sensor temperature compensation testing. Background technique [0002] Even if the load cell uses the same batch of strain gauges, it will cause errors due to the slight temperature difference between the strain gauges. This temperature difference will affect the bridge zero output and sensitivity of the load cell, thereby affecting the weighing accuracy. Therefore, it is usually necessary to perform temperature compensation on the load cell, and the temperature-compensated load cell can only be loaded into the weighing apparatus after being tested. When performing temperature compensation tests on load cells, it is generally necessary to alternate tests under multiple temperature conditions such as -10°C, 20°C and 40°C. In the test process, the load cell is directly placed in the thermostat of...

AI Technical Summary

Problems solved by technology

During the test, the load cell is directly placed in the thermostat of the test force machine, and the temperature is raised and lowered and kept warm at the above temperatures. After the temperature is balanced, the preload, linearity, repeatability and balance of the loaded weight are performed. The test time for creep characteristics and other tests is generally about 22 hours per piece, and the temperature rise and fall of the load cell and the holding time are about 19 hours. Due to the long auxiliary time of thermal balance, the entire test time is long, not only consumes a lot of energy, Moreover, the production efficiency is low, which is the bottleneck problem of manufacturing load cells at present.

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