Mechanical filter

Abstract

The invention discloses a mechanical filter. The mechanical filter comprises an energy storage part and a fin part, wherein the energy storage part and the fin part are fixed, and a temperature measuring part suitable for temperature measurement is arranged on the energy storage part. A fluid is subjected to heat application treatment such as heating and refrigeration, temperature distribution isnot uniform, a natural convection flow field is formed in the fluid under the action of gravity, the flowing of the fluid generates a disturbance signal to temperature detection, particularly to an ultralow-frequency disturbance signal with a period reaching the several-minute magnitude, the ultralow-frequency disturbance signal is difficult to filter out through an electronic filter, the mechanical filter can filter out the ultralow-frequency disturbance signal, a temperature sensor equipped with the filter can accurately detect fluid temperature, the interference influence of the disturbancesignal is avoided in the heat application treatment process, then fluctuation amplitude of the fluid temperature is extremely small, so that the fluid temperature is more easily stabilized at a set value, and temperature stabilization is shorter in required time.

Description

technical field [0001] The invention relates to a filter, in particular to a mechanical filter suitable for filtering out ultra-low frequency disturbance signals applied to temperature detection, and belongs to the field of signal processing. Background technique [0002] In the fluid with uneven temperature distribution, under the action of gravity, a natural convection flow field is generated. There are a large number of advection, turbulence and turbulent flow areas inside the fluid. The temperature distribution is uneven. The fluid flow with uneven temperature distribution produces disturbance signal interference to the detection of temperature, forming an ultra-low frequency disturbance signal with a period as high as several minutes, and the electronic filter is difficult to filter out and cannot accurately measure the temperature of the fluid. During the heat treatment process, the disturbance of the disturbance signal makes the heater, air conditioner and other heat...

AI Technical Summary

Problems solved by technology

Fluid flow with uneven temperature distribution will generate disturbance signal interference to temperature detection, forming an ultra-low frequency disturbance signal with a period as high as several minutes, and it is difficult for electronic filters to filter out, so it is impossible to accurately measure the temperature of the fluid

During the heat treatment process, the interference effect of the disturbance signal makes the heater, air conditioner and other heating devices overshoot and amplifies the disturbance signal, resulting in large fluctuations in the fluid temperature, making it difficult to stabilize at the set value

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