2 results about "Correlation equation" patented technology

This invention discloses a method for visually measuring the wind speed of an airflow field. The measurement method includes six steps: placing a constant-power electric heating plate with a temperature higher than that of the airflow in the path of the airflow to be measured; using a thermal imager to photograph the airflow in front of the constant-power electric heating plate to obtain a thermal image of the temperature distribution of the constant-power electric heating plate during heat exchange; exporting the temperature values ​​from the image; using a hot-wire anemometer to detect the air speed at a specific point; fitting a correlation equation using the temperature and velocity values ​​at the specific point; exporting the temperature and coordinate values ​​of N or all pixels in the temperature distribution image of the electric heating plate, and substituting them into the correlation equation to obtain the velocity values ​​at each point in the airflow field. This allows for a direct visualization of the velocity distribution and range of the measured airflow field. This invention can accurately acquire the velocity field of the airflow, and the method is applicable to the velocity field detection of various complex airflows, and can accurately determine the diffusion range of a gas jet.

This invention relates to a method for fitting transmission line loss using linear regression, comprising the following steps: obtaining loss factors corresponding to multiple discrete frequency points based on the characteristic data of the substrate used in the transmission line; establishing a correlation equation between the loss factor and frequency using a linear regression algorithm, and configuring the correlation equation as a dynamic loss factor parameter in the transmission line simulation model; performing transmission line loss simulation through the configured simulation model to achieve full-band fitting of transmission line loss. This invention utilizes the dynamic correlation equation between the loss factor and frequency to avoid simulation deviations caused by fixed value settings, significantly improving the reliability of transmission line loss simulation results and achieving a high degree of consistency between simulated data and measured transmission line loss data within the target frequency band. This invention can construct dynamic loss factor parameters based solely on official substrate characteristic data and a linear regression algorithm, with a simple operation process, low implementation cost, and rapid application by circuit designers.