2results about How to "Guaranteed ranging accuracy" patented technology

This invention discloses a calibration method, apparatus, device, and storage medium for an obstacle detection system, belonging to the field of vehicle calibration technology. When the vehicle is stationary, the invention controls a calibration obstacle to move along a slide rail. When the obstacle moves to a preset distance from an ultrasonic probe, the ultrasonic probe's frequency sweep function is activated, and the operating frequency of the ultrasonic probe after the sweep function is activated is recorded. The ultrasonic probe is then controlled to detect the obstacle according to the operating frequency, and the detection time and air parameters are recorded. The obstacle detection system is calibrated based on the preset distance, operating frequency, detection time, and air parameters. This provides factory online calibration of the obstacle detection system, adaptive calibration for the parameters of each ultrasonic sensor, and real-time secondary calibration during vehicle use. This improves signal strength and ensures ranging accuracy, thereby enhancing the safety of automatic side door opening and closing.

The invention provides a real-time distance measurement method and device based on a UWB technology in a leveling process, and relates to the technical field of engineering surveying and mapping. According to the technical scheme provided by the invention, the initial cumulative confidence is determined according to the environment type by acquiring the ranging environment parameters, so that ranging environments with different qualities have differentiated confidence starting points. The current data quality is quantified by calculating discrete feature indexes in a continuous sampling period, and the current data quality is converted into a confidence increment value according to a mapping rule table to be accumulated into a target accumulated confidence coefficient. And when the target accumulated confidence reaches the target confidence threshold, sampling is automatically terminated, and target discrete ranging data is screened for distance calculation, so that excessive sampling in a good environment and insufficient sampling in a severe environment are avoided, and the ranging efficiency can be improved on the premise of ensuring the ranging precision corresponding to different measurement environments.