Vehicle distance warning for drivers - using radar waves for monitoring vehicle in front with transmit and receive aerial effective within specified range

摘要

The system serves as an aid to maintain appropriate distance from a preceding vehicle (A). The latter is monitored by the following vehicle (B). For this purpose a radar beam (5) is reflected from the front vehicle and transmitted again forward as an echo beam (E). The electronic evaluation of the radar transit differences takes place in a microprocessor (2.1) of the front vehicle. This evaluation considers various parameters, such as measuring sensor actual values, the vehicle speed, temperature, and traffic conditions. The evaluation results in optical and/or acoustic signal transmission, when the following vehicle is at permitted distance, or less than that, from the front vehicle. The system may be applied to stationary obstacles.