5results about How to "Realize dynamic measurement" patented technology

The application relates to a wheel-rail position relationship measurement method and system based on a rolling vibration test bench of a rail vehicle, computer equipment and a medium. The method comprises the following steps: S1, measuring displacement variation of each of a wheel and a rail in a movement process; S2, calculating lateral displacement and a plunge angle of each of the wheel and the rail based on the displacement variation; S3, calculating a flange gap of the wheel and the rail in the movement process based on the lateral displacement of each of the wheel and the rail; and S4, when the flange gap is greater than a preset value, calculating equivalent taper between the wheel and the rail based on the flange gap. The method can accurately measure the wheel-rail position relationship through the rolling vibration test bench of the rail vehicle.

This invention provides a dynamic beam quality measurement device based on a fast deflecting mirror and a microlens group, comprising a first fast deflecting mirror, a second fast deflecting mirror, a microlens group, a focusing lens, and a charge-coupled device (CCD) camera arranged sequentially along the optical path. The first fast deflecting mirror reflects the laser beam to be measured onto the second fast deflecting mirror, and the second fast deflecting mirror reflects the laser beam modulated by the first fast deflecting mirror to the centers of different microlenses within the microlens group. The microlens group consists of multiple microlenses. The focusing lens is arranged in the transmission optical path of the microlens group, and the CCD camera is arranged at the focal point of the focusing lens in the transmission optical path of the focusing lens. In this invention, a single image acquired by the CCD camera can capture the distribution of four laser beam spots focused by lenses with different focal lengths. Combined with the high-speed deflection of the two fast reflecting mirrors, dynamic measurement of laser beam quality can be achieved while ensuring measurement accuracy.

The invention belongs to the technical field of gas detection, and particularly relates to a gas concentration measurement method and system based on adaptive wavelength. The measurement method comprises the following steps: obtaining a waveform curve of a to-be-measured gas absorption signal; if the current waveform curve is distorted, the to-be-detected gas is scanned again after the current scanning interval is widened until the newest waveform curve is not distorted, and the newest waveform curve is subjected to convolution processing to obtain a second reasonable curve; and if K3 continuous sampling points greater than a third set threshold exist in the absorption interval of the second reasonable curve, recording the current second reasonable curve as a third reasonable curve, and calculating the current concentration of the gas to be detected according to the third reasonable curve, on the contrary, the scanning interval corresponding to the current second reasonable curve is narrowed, and then the to-be-detected gas is scanned again. According to the invention, high-efficiency and accurate concentration measurement can be carried out on to-be-measured gases with different concentrations.

The present invention discloses a variable acceleration motion simulation test platform for turbine machinery foundation, including a fixed seat, a positioning plate, an oscillation table, a base, an elastic support, and a power assembly. The base is fixed to the ground, and the oscillation table is arranged horizontally above the base at intervals. One side of the oscillation table is connected to the support seat on the base through a bearing, and the other side is connected to the upper surface of the base through an elastic support. The power assembly is installed on the base and connected to the side of the oscillation table close to the elastic support. The positioning plate and the fixed seat are arranged in sequence from bottom to top. The bottom surface of the positioning plate is connected to the upper surface of the oscillation table through bolt one, and the bottom surface of the fixed seat is connected to the upper surface of the positioning plate through bolt two. The turbine machinery is installed on the fixed seat through bolt three. A motion simulation method thereof is also provided. The present invention provides experimental test support for conducting research on the rotor dynamic characteristics of turbine machinery operating on the basis of variable acceleration.

The invention provides a method and device for measuring a liquid jet gas-liquid interface in a closed environment, and relates to the technical field of measurement, and the method comprises the steps: obtaining the position of an ultrasonic detector in a target closed environment, and a reference ultrasonic signal and a target ultrasonic signal detected by the ultrasonic detector in the closed environment; the reference ultrasonic signal and the target ultrasonic signal are ultrasonic signals collected when no jet flow exists in the target closed environment and when jet flow exists in the target closed environment; acquiring a scattering signal and corresponding scattering information based on the reference ultrasonic signal and the target ultrasonic signal; matching a target scatterer size corresponding to the scattering information and the position from a pre-constructed scattering information database in which different scattering information, different positions and corresponding scatterer sizes are stored; the size of the target scatterer is the size of the scatterer generating the jet flow. According to the invention, dynamic measurement of the jet flow gas-liquid interface in the closed combustion chamber can be realized.