PID temperature controller and method

Abstract

This invention provides one PID temperature controller and its method, which is applied in fix materials heat conductive effect measurement for control of sealed chamber temperature and comprises sealed indoor temperature sensor, dissipation source and outside computer board card and computer; using sensor to collect sealed chamber temperature signals; then inputting signal into computer board card analogue end for digital filter process and computation process; then using the computation result as control signal sent to discharge source to realize temperature control.

Description

technical field [0001] The invention relates to a PID (proportional-integral-differential) temperature controller and a method, in particular to a controller and a method for controlling and keeping the temperature of a chamber constant during the process of measuring solid heat conduction performance. Background technique [0002] In the research and development and production process of some functional materials, it is necessary to accurately measure the thermal conductivity of the material, that is, the thermal conductivity. At present, the following two measurement methods are mainly used: [0003] 1. Laser scintillation method. This method uses high-energy laser as a heat source to quickly deposit a certain amount of heat on one surface of the sample in a short period of time, and measure the temperature change on the other surface of the sample to measure the thermal diffusivity of the sample, and then calculate the thermal conductivity of the sample material through ...

AI Technical Summary

Problems solved by technology

Ideally, all the heat from the heat source is transferred to the low-temperature heat sink through the sample to be tested, but in practice, some heat is inevitably dissipated from other directions, resulting in measurement errors

[0011] The above method is effective for measuring the thermal conductivity of materials with medium thermal conductivity, such as plastic, epoxy resin, glass, etc. Complexity often leads to inaccurate test results

And there is currently no experimental data to prove that after different materials are combined, the λ value can be accumulated, making the λ value more complicated and uncertain

For example, in the actual measurement of the heat conduction law of composite flooring, this method cannot achieve accurate detection. The most obvious performance is that the experiment has no repeatability

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