A method of operating an activity recognition system includes capturing ambient radio frequency (RF) data by an RF sniffer. The ambient RF data is then received by a processor. The processor reduces noise content of the ambient RF data. Background is then subtracted from the ambient RF data by the processor. The processed ambient RF data is then converted into an image by the processor. The system generates successive images for each one of a plurality of time intervals. An image processing algorithm, stored in a storage medium and executed by the processor, is applied to the plurality of successive images to determine activity recognition.

A unified presence detection and prediction platform that is privacy aware is described. The platform is receives signals from plural sensor devices that are disposed within a premises. The platform produces profiles of entities based on detected characteristics developed from relatively inexpensive and privacy-aware sensors, i.e., non-video and non-audio sensor devices. The platform using these profiles and sensor signals from relatively inexpensive and privacy-aware sensors determines specific identification and produces historical patterns. Also described are techniques that allow users (persons), when authorized, to control remote devices/systems generally without direct interaction with such systems merely by the systems detecting and in instances predicting the specific presence of an identified individual in a location within the premises.

A system for object detection within a monitored zone around a vehicle includes: at least one processor; and memory encoding instructions which, when executed by the processor, cause the system to: detect an object; and suppress an alert associated with detection of the object when a size of the detected object is below a lower size threshold value or above an upper size threshold value.

A device and method for detecting motion with antimasking capability. In one example, the device includes an antenna, a dual-channel reception circuit, and an electronic processor. The dual-channel reception circuit includes a first channel and a second channel. The electronic processor is electrically connected to the dual-channel reception circuit and is configured to receive a first signal from the first channel indicative of motion at a first range, and receive a second signal from the second channel indicative of motion at a second range. At least a portion of the second range is shorter than the first range. Based on the first signal and the second signal, the electronic processor is configured to generate a notification.

Techniques for providing status information of a defined location are described. Data indicative of signal strength associated with radio frequency (RF) signals received by one or more devices communicating via a wireless communications protocol is accessed. A baseline signal strength profile based on the data is determined. The data indicative of signal strength associated with RF signals received by the one or more devices is monitored. Based on a comparison of the monitored data to the baseline signal strength profile, a presence of at least one person in a vicinity of the one or more devices is determined. At least one action based on the determined presence is initiated.

Described is a security sensor comprising two or more sub-sensors for use in a variety of installations where different magnetic fields may be experienced by the security sensor as a result of the variety of installations. One of the sub-sensors may have a low magnetic sensitivity while the other sub-sensor may have a much higher sensitivity to magnetic fields. In operation, one or both sub-sensors are used to determine if a door or a window has been opened.

Systems and methods for adjusting a broadcast pattern of an intrusion detector are provided. Such systems and methods can include a microwave sensor of the intrusion detector broadcasting a detection signal into a secured area in the broadcast pattern, a communication module of the intrusion detector wirelessly receiving a signal adjustment command from a remote device, and a processor and executable control software of the intrusion detector parsing the signal adjustment command and instructing a signal adjuster of the intrusion detector to adjust a sensitivity of the microwave sensor or an amplitude of the detection signal to alter the broadcast area of the broadcast pattern based on information contained in the adjustment command.

Systems and methods for activating and deactivating controlled devices are provided. Such systems and methods can include a microprocessor unit sampling signal data from a smart microwave sensor module to detect a presence of a user within a secured area, using the signal data to track a route of the user within the secured area, and activating or deactivating the controlled devices located within the secured area based on a location of an end of the route. Such systems and methods can include activating the controlled devices when the location of the end of the route is within the secured area and deactivating the controlled devices when the location of the end of the route is not outside of the secured area.

A system, including: a radar including a transmitter and a receiver, the transmitter configured to transmit an electromagnetic wave; a reflector placed a predetermined distance away from the radar, the reflector configured to reflect the transmitted electromagnetic wave back to the receiver; and a control unit coupled to the radar and configured to measure a magnitude of the reflected electromagnetic wave received at the receiver from the reflector by measuring Doppler signal corresponding to the predetermined distance, wherein the control unit is configured to measure a reference value of the magnitude of the reflected electromagnetic wave when no intrusions are occurring, and wherein the control unit is configured to trigger an alarm when the magnitude of the reflected electromagnetic wave changes from the reference value.

A system and method are provided, for sensing an environment. The system and method analyze wireless signals in the environment to determine effects on the wireless signal by the environment during propagation thereof, the effects being indicative of at least one characteristic of the environment.