a mechanical filter

Abstract

The invention discloses a mechanical filter, which comprises an energy storage part and a fin part, 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. The fluid is subjected to heat treatment such as heating and cooling, and the temperature distribution is uneven. Under the action of gravity, a natural convection flow field is formed in the fluid, and the flow of the fluid generates disturbance signals for temperature detection, especially ultra-low frequency disturbance signals with a period of several minutes. , and it is difficult for the electronic filter to filter out the above-mentioned ultra-low frequency disturbance signal, but the mechanical filter of the present invention can filter out the ultra-low frequency disturbance signal, and the temperature sensor equipped with the filter can accurately detect the temperature of the fluid, and the During the heat treatment process, without the influence of disturbance signal interference, the fluctuation range of the fluid temperature is extremely small, it is easier to stabilize the fluid temperature at the set value, and the time required for temperature stabilization is shorter.

Description

technical field [0001] The invention relates to a filter, in particular to a mechanical filter suitable for filtering ultra-low frequency disturbance signals used in temperature detection, and belongs to the field of signal processing. Background technique [0002] The fluid with uneven temperature distribution, under the action of gravity, produces a natural convection flow field. There are a large number of advection, turbulence, and turbulent flow areas inside the fluid. The configuration distribution of the fluid temperature is like a hilly landform. The temperature distribution is uneven. Fluid flow with uneven temperature distribution produces 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 the temperature of the fluid cannot be accurately measured. During the heat treatment process, the interference of the ...

AI Technical Summary

Problems solved by technology

The flow of fluid with uneven temperature distribution will generate disturbance signal interference to the detection of temperature, 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 causes the overshoot of heating devices such as heaters and air conditioners to amplify the disturbance signal, resulting in large fluctuations in the fluid temperature, making it difficult to stabilize at the set value

Images