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US 2014/0151558 A1Published application
Occupancy sensor
AssigneeOSRAM GmbH
InventorsEnrico Bortot, Christian Cecchetti, Stefan Hackenbuchner, Uwe Liess, Torsten Mannke
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Abstract
An occupancy sensor with the following components is disclosed: a sensing probe to detect occupancy of a space monitored by the sensor and to produce a corresponding sensing signal; a comparator, including a voltage divider defining a comparison value, against which the sensing signal is compared to detect occupancy; and a voltage sensing means to sense a feed voltage applied to the sensor, where changes in the feed voltage to the sensor induce a change in the comparison value.
Claims17
An occupancy sensor including:
- a sensing probe to detect occupancy of a space monitored by the sensor and produce a corresponding sensing signal,
- a comparator including a voltage divider defining a comparison value against which said sensing signal is compared to detect said occupancy,
- a voltage sensing means to sense a feed voltage applied to the sensor, wherein changes in said feed voltage induce a change in said comparison value,
- said voltage divider including at least one resistor selectively switchable to counter changes induced in said comparison value by changes in said feed voltage.
1 more element
Dependencies are inferred from the claim text.