2results about How to "Improve distance accuracy" patented technology

This invention provides a novel scanning laser wind-measuring radar, employing a high-stability, narrow-linewidth semiconductor laser as the transmitting device. A high-speed optical switch precisely modulates the continuous laser in the time domain to generate ideal laser pulses. High-power amplifiers and low-noise amplifiers are used to enhance the transmitted power and echo signal quality, significantly compensating for the decrease in atmospheric echo power and improving range resolution and wind speed accuracy. The high-stability, narrow-linewidth laser improves the signal-to-noise ratio through a triple mechanism of increased coherence efficiency, reduced background noise, and sharpened spectral resolution, enabling long-range detection. When using a transceiver telescope system, it avoids a reduction in the scanning field of view due to a decrease in signal-to-noise ratio. The semiconductor laser solution is lighter than fiber lasers, suitable for airborne platforms, and enables miniaturized laser wind-measuring radar equipment. Furthermore, the high-stability, narrow-linewidth semiconductor laser used meets temperature and vibration stability requirements, ensuring the long-term reliability of the wind-measuring radar in field environments.

The present application relates to the technical field of non-contact measurement, and provides a large-range and high-precision eddy current distance measuring sensor, which comprises a base and a top cover plate fixed to the top of the base, the base has a containing cavity, a control circuit board is installed in the containing cavity, the base also has a shielding layer and an eddy current coil circuit board, the shielding layer is formed by splicing at least two shielding plates, a via hole is formed in the center, and the bottom of the base is sealed with sealing glue. The product adopts a large-size eddy current coil circuit board and a reasonable shielding scheme, the shielding layer adopts a splicing form of shielding plates, the product can be actually placed on the ground, has the characteristics of non-contact, large range, high precision and the like, and is suitable for related requirements of railway wagon measurement and use. The product as a whole adopts a compact integrated design, has a clever structure design, is convenient to maintain as a whole, and is convenient to install; the product adopts an integrated sealing glue process, and can withstand extremely severe mechanical and climate environments on a wagon bogie.