Patent ID: 6597287
Filing Date: 2003-07-22
Classification: G01J,G08B

Abstract:
Movement sensor device with a pyroelectric sensor adjusted to operate in daylight, and an electronic evaluation device connected downstream of the sensor and designed to generate a control signal (S) as a reaction to a detector signal of the sensor relative to a threshold value, wherein the electronic evaluation device comprises means for measuring a daylight-ambient luminosity, and compensating means designed in such a way that they carry out a compensating threshold value change in the threshold value and/or a compensating change in the detector signal as a reaction to a predetermined change in the daylight-ambient luminosity, the electronic evaluation device being designed in such a way that the compensating means only act if a change in the daylight-ambient luminosity is more than 1,000 lux in a band-pass filter-like response range of the sensor.