Smart passive sensing method for light-controlled lamps

Abstract

The invention discloses a smart passive sensing method for light-controlled lamps. The smart passive sensing method includes disposing a pyroelectric infrared sensor array; installing Fresnel lenses on pyroelectric infrared sensors; accumulating output signals of the pyroelectric infrared sensors in the pyroelectric infrared sensors; amplifying the accumulated signals; performing differential operation on the amplified signals; rectifying the signals subjected to the differential operation and outputting the rectified signals; and judging whether objects enter a sensing area or not according to the rectified signals. The output signals of the pyroelectric infrared sensor array are subjected to amplification, differential operation, reverse phase and rectifying operation, so that the positive pulse and negative pulse in the output signals are separated, sensing accuracy is improved, whether people are in the sensing area or not can be accurately judged according to amplitude and width of the output pulse, the ubiquitous problem that motionless people in the sensing area cannot be sensed in the existing passive sensing method for light-controlled lamps is solved, passing-by people in the sensing area can be smartly accurately sensed, and the smart passive sensing method for the light-operated lamps can be used in places such as basements, passageways, corridors and cupboards.

Description

technical field [0001] The invention relates to a sensing method for light-controlled lamps, in particular to a passive sensing method by performing differentiation, rectification and other processing on the output signal of a pyroelectric infrared sensor array. Background technique [0002] In basements, corridors, stairs and other places, light control methods are often used to control the switch of lighting lamps. The light control method mainly uses pyroelectric infrared sensors and Fresnel lenses to detect whether there are moving targets in the lighting area, such as Chinese patent ZL200520118497.3 An inductive LED lamp disclosed in Chinese patent ZL200620014274.7, a solar pyroelectric induction control LED lamp disclosed in Chinese patent ZL200720036738.9, an infrared light-controlled LED induction lighting. These light control methods are only suitable for moving targets. If someone stays in the lighting area for a long time, the light source cannot be kept on normal...

AI Technical Summary

Problems solved by technology

These light control methods are only suitable for moving targets. If someone stays in the lighting area for a long time, the light source cannot maintain the normal open state

In addition, when the ambient temperature is high and close to the body temperature of the human body, the signal sensed by the pyroelectric infrared sensor is small, which affects the normal switching of the light source.

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