A system, method and apparatus for monitoring a barrier. The barrier sensor refrains from transmitting an alarm signal to a receiver when the barrier sensor determines that the barrier has been placed into an open position and that a human being is inside the premises in proximity to the human detection device. Further, the barrier sensor transmits an alarm signal to a receiver when the barrier sensor determines that the barrier has been moved from the open position and that a human being is not inside the premises in proximity to the barrier.

A smoke detector system is provided. The smoke detector system includes a smoke detection element. The smoke detector system further includes an internal air quality (IAQ) sensor. The IAQ sensor is disposed and configured to confirm whether an alarm issued by the smoke detection element is real or a false alarm.

Disclosed is a device for detecting the fall of a person, comprising at least one matrix thermal sensor (2), preferably a matrix thermopile sensor.

A smoke and temperature detection system includes a plurality of fiber optic cables terminating in a plurality of nodes positioned to monitor a fire or smoke condition at one or more protected spaces, and a temperature detection fiber optic cable having a plurality of fiber Bragg gratings arrayed along the temperature detection fiber optic cable. A control system is operably connected to the plurality of fiber optic cables and to the temperature detection fiber optic cable. The control system includes a first light sensitive device configured to receive a scattered light signal from the plurality of fiber optic cables, and a second light sensitive device configured to receive a reflected light signal from the fiber Bragg gratings. The control system is configured to detect a temperature at the fiber Bragg gratings based on one or more properties of the reflected light signal received at the second light sensitive device.

A fire detection system includes a transmitter including a light source that sends an optical signal and a receiver including a detector that detects the optical signal sent from the light source through a predetermined light propagation section, a signal processing unit that calculates at least one of a first gas concentration, a first smoke concentration, and a first temperature in the light propagation section based on the optical signal, a sensor that acquires at least one of a second gas concentration, a second smoke concentration, and a second temperature in the surroundings, and a determiner that determines whether there is a fire by comparing at least one of the first gas concentration, the first smoke concentration, and the first temperature with at least one of the second gas concentration, the second smoke concentration, and the second temperature in the surroundings.

An improved system and method for detecting smoke using a sensor is disclosed. The method can comprise the steps of storing in memory a plurality of smoke signatures, wherein each of the smoke signatures relates to how the sensor senses one of a plurality of particulates, each of the plurality of particulates indicative or non-indicative of a fire, and receiving current data from the sensor. Moreover, the method can comprise the steps of comparing the current data with the plurality of smoke signatures to determine if the current data matches any of the plurality of smoke signatures, and initiating an alarm sequence based at least in part on a determination as to whether the current data matches a smoke signature related to a fire-indicative particulate of the plurality of particulates.

A headgear-based sports signaling system which includes a controller capable of transmitting electronic signals to receivers mounted in or on sports headgear, and wherein the receivers control lights or other displays in or on the sports headgear to signal events that have occurred during game play. In some configurations, the controller is a whistle with airflow detection which transmits signals to the headgear when airflow is detected in the whistle.

A fire detection system includes a heat detector configured to monitor a fire detection volume; a smoke detector configured to monitor the fire detection volume; and an occupancy sensor configured to detect the presence of at least one person within the fire detection volume. The fire detection system is configured to monitor for the presence of a fire within the fire detection volume using the heat detector and the smoke detector responsive to determining, using the occupancy sensor, that the fire detection volume is unoccupied. The fire detection system is configured to monitor for the presence of a fire within the fire detection volume using the heat detector and not using the smoke detector responsive to determining, using the occupancy sensor, that the fire detection volume is occupied.

It is provided a method for determining when a break-in attempt is in process. The method is performed in a break-in determiner and comprises the steps of: determining that a first vibration condition is tme when a vibration parameter associated with a barrier is greater than a first threshold, wherein the first vibration parameter is obtained from measurements from an accelerometer; determining whether an acceptable activity condition is tme or not, such that the acceptable activity condition is true only when there is an auxiliary signal indicating acceptable activity comprising determining that the acceptable activity condition is tme only when a time difference between determining that the first vibration condition is true and receiving the auxiliary signal is less than a threshold duration; and determining that a break-in attempt is in process when the first vibration condition is tme and the acceptable activity condition is false.

Adjusting communication channels used by camera to communicate with a base station are described. In one aspect, characteristics of communication channels can be determined and the operation of the camera can be adjusted to use a communication channel based on a comparison of the characteristics of multiple communication channels.