Arrangement for recognizing and monitoring velocity of nature bodies and object of conveyer for persons, has circuitry provided with high frequency amplifier, antenna and controller, where arrangement is operated in closed field of antenna

摘要

The arrangement has a circuitry (10) with an adjustable oscillator (16) for generating electromagnetic signals. The circuitry is provided with a high frequency amplifier (18), a measuring four-pole network (24), an antenna (12) i.e. commercial wireless local area network antenna, and a controller with a controlling unit, where the arrangement is operated in a closed field of the antenna. A radiation characteristic of the antenna is measurably changed by nature bodies and/or objects, and an output signal produced by the controller is displayed on a display device.