Passive cooling device for linear variable differential transformer type displacement sensor (LVDT)

Abstract

The invention discloses a passive cooling device for a linear variable differential transformer type displacement sensor (LVDT), belongs to the field of instrument detection, and solves the problems that in an existing fire test process, the LVDT is reduced in measuring precision and even is burnt out due to long-time working in a high-temperature environment. The LVDT is inserted into the inner wall from one side of a measuring rod; the lower wall and the lower end surface of a guide rod of the LVDT are located on the same plane; then the upper portion of a shell of the LVDT is fixed on a static reference object; two iron wires are used for binding a main body to the static reference object which fixes the LVDT through two nuts; then a water inlet pipe communicates with a water faucet through a fire-resistant armored hose; the water outlet pipe communicates with a drainage pipe through a fire-resistant armored hose; a fire test is carried out; after the fire test is started, water isinjected into the main body 1 through the water inlet pipe 2; and hot water in the main body 1 is discharged through the water outlet pipe 3, so that the purpose of taking away heat in the main body 1is achieved, and then the LVDT is cooled. The device has the advantages of being easy to operate, convenient to assemble and disassemble, time-saving, labor-saving and reusable.

Description

technical field [0001] The invention relates to a passive cooling device for a differential transformer type displacement sensor (LVDT), belonging to the field of instrument detection. Background technique [0002] Differential Transformer Displacement Transducer (LVDT) is a sensor that converts the measured displacement into an electrical signal. It can not only be used to measure the relative displacement between objects, the length change of objects and the geometric dimensions of parts; it can also be used to measure The deformation (displacement) of various models, test pieces, rock mass, concrete, metal or non-metallic material components under the action of force or temperature change; at the same time, it can also measure various physical quantities that are converted into linear displacement in advance , such as pressure, force, tension, liquid level changes, etc. It can measure not only static displacement, but also dynamic displacement. In addition, LVDT can out...

AI Technical Summary

Problems solved by technology

[0004] The present invention proposes a passive cooling device for a differential transformer type displacement sensor (LVDT) in order to solve the problem that the LVDT works in a high temperature environment for a long time in the existing fire test process, and the measurement accuracy decreases or even burns out.

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