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Sensor device and method for operating a sensor device

  • US 6,597,287 B1
  • Filed: 09/28/2000
  • Issued: 07/22/2003
  • Est. Priority Date: 04/15/1998
  • Status: Expired due to Term
First Claim
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1. 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.

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