초록 ▼

A multiple sensing technology-based occupancy sensor. Ultrasonic and infrared sensors are used to produce first and second occupancy estimator signals that are combined using a fusion based detection algorithm to produce a combined estimator signal. The combined estimator is then used to switch elec

A multiple sensing technology-based occupancy sensor. Ultrasonic and infrared sensors are used to produce first and second occupancy estimator signals that are combined using a fusion based detection algorithm to produce a combined estimator signal. The combined estimator is then used to switch electrical loads when the combined estimator signal is above a predetermined threshold. The result is an occupancy sensor that has a very high probability of occupancy detection and a low probability of false tripping.

대표청구항 ▼

[ What is claimed is:] [1.] An occupancy based load controller, comprising:a plurality of occupancy sensors for producing a respective plurality of occupancy estimator signals, each occupancy estimator signal existing at more than two signal levels that are related to a level of motion within a spac

[ What is claimed is:] [1.] An occupancy based load controller, comprising:a plurality of occupancy sensors for producing a respective plurality of occupancy estimator signals, each occupancy estimator signal existing at more than two signal levels that are related to a level of motion within a space detected by the respective occupancy sensor;a programmable microprocessor connected to said plurality of occupancy sensors, for calculating a composite occupancy estimator from said plurality of occupancy estimator signals, and for comparing said composite occupancy estimator to a composite activation threshold; anda controllable load energizing device responsive to said microprocessor, operable to automatically energize an electrical load when said microprocessor determines that said composite occupancy estimator is greater than said composite activation threshold.