This disclosure relates to a method of detecting an occupancy state of a living space for controlling lighting apparatus. The method comprises using a motion sensor to send wave signal and detect echoed signal reflected from a moving human body and using a control circuitry operated with a software program to analyze the echoed signal for establishing a numerical value account. In referring to preset parameters, the software program judges the echoed signal by analyzing time duration and frequency pattern of the echoed signal as an incoming motion, an outgoing motion or a local random motion, such that the numerical value account is accordingly updated to represent actual occupant number for activating the controller circuitry to turn on or turn off the lighting apparatus.

A method of detecting an occupancy state of a living space for controlling the on/off performance of a lighting apparatus. The method using a microwave motion sensor to detect a motion intrusion, wherein a microcontroller with program codes analyzes a time duration and a frequency pattern of the echoed microwave signal generated by the motion intrusion in the living space. The method using an occupancy counting APP to record, wherein an updated numerical value represents the number of occupants remaining in the living space for operating the illumination. The echoed microwave signal is judged with the frequency pattern being lower or higher than the frequency pattern of the microwave signal transmitted to adjust the numerical value. When the microwave motion sensor is operated with a frequency level below 20 GHz, a microwave confining device is required to limit a detecting capacity of the microwave motion sensor.

A method of detecting an occupancy state of a living space for controlling the on/off performance of a lighting apparatus. The method using a microwave motion sensor to detect a motion intrusion, wherein a microcontroller with program codes analyzes a time duration and a frequency pattern of the echoed microwave signal generated by the motion intrusion in the living space. The method using an occupancy counting APP to record, wherein an updated numerical value represents the number of occupants remaining in the living space for operating the illumination. The echoed microwave signal is judged with the frequency pattern being lower or higher than the frequency pattern of the microwave signal transmitted to adjust the numerical value. When the microwave motion sensor is operated with a frequency level below 20 GHz, a microwave confining device is required to limit a detecting capacity of the microwave motion sensor.

A microwave motion sensor has a circuit assembly for intrusion detection in a predetermined space. The microwave motion sensor comprising a control unit, a microwave sensing unit and a microwave confining unit. The microwave sensing unit, for transmitting and receiving a microwave signal, is separated in structure but electrically coupled to the control unit. The microwave confining unit, for managing a detection zone of the microwave signal, has an accommodating space formed inside the microwave confining unit, and the microwave sensing unit being disposed inside the accommodating space. Wherein the circuit assembly is divided into the control unit and the microwave sensing unit, the scope of the detection zone of the microwave signal varies based on the shape of the microwave confining unit and the shape of the microwave confining unit varies based on the predetermined space.

Systems, methods, and devices for an intrusion detection system are described herein. For example, one or more embodiments include transmitting a DSSS signal, receiving a reflected DSSS signal from a target, correlating the reflected DSSS signal and the transmitted DSSS signal, and determining a distance to the target based on the correlation between the reflected DSSS signal and the transmitted DSSS signal.