A system for detecting a fire or overheating event includes a heat detector, an optical fiber, a photodetector, and a processing unit. The pneumatic heat detector includes a sealed chamber sealed with a diaphragm having an initial position, and the optical fiber is in operable communication with the diaphragm. The optical fiber includes a Fiber Bragg Grating (FBG). The optical signal generator is configured to emit an optical signal with into the optical fiber. The photodetector is configured to receive a reflected optical signal from the FBG. The processing unit is configured to correlate the reflection wavelength of the reflected optical signal with a temperature of the heat detector.

The present disclosure relates to vape detection systems and methods. In various embodiments, a vape detection system includes a light source, a detector, and a controller. The light source is configured to emit light that includes a predetermined wavelength that is absorbable by a constituent of vape. The detector is configured to detect light resulting from the emitted light. The controller is in communication with the light source and the detector and is configured to control the light source to emit the light including the predetermined wavelength, control the detector to detect light resulting from the emitted light, and determine, based on absorption spectroscopy and based on a change between the emitted light and the detected light, that the constituent of vape is present.

The invention relates to the field of security, more particularly, to a lighting system with monitoring and alarm function. the illuminating module can supply sufficient light for the monitoring are of the monitoring module, so as to improve the clarity of the monitoring data collected by the monitoring module, and the mobile terminal can control the monitoring module and the illuminating module by the control instruction remotely, to provide convenience for user's remote operation; in addition, the mobile terminal can acquire the illuminating information and the monitoring data easily, which realizes user's remote monitoring, and facilities users to grasp the situation of monitoring area, and when huge amount of smog appears or some human activities appearing at a region that should have no people in monitoring area during monitor process, it will promptly reminds uses, which provides a good security effect.

The invention relates to the field of security, more particularly, to a lighting system with monitoring and alarm function. the illuminating module can supply sufficient light for the monitoring are of the monitoring module, so as to improve the clarity of the monitoring data collected by the monitoring module, and the mobile terminal can control the monitoring module and the illuminating module by the control instruction remotely, to provide convenience for user's remote operation; in addition, the mobile terminal can acquire the illuminating information and the monitoring data easily, which realizes user's remote monitoring, and facilities users to grasp the situation of monitoring area, and when huge amount of smog appears or some human activities appearing at a region that should have no people in monitoring area during monitor process, it will promptly reminds uses, which provides a good security effect.

External conditions, e.g., smoke, temperature, humidity, humidity, pressure, flow rate, etc., affects a sensor's characteristics, wherein the sensor provides a current output representative of its characteristics as affected by the external conditions. The current output of the sensor is coupled to a sample and hold capacitor for a precision time period thereby charging the sample and hold capacitor to a voltage proportional to current provided by the sensor over the precision time period. The voltage on the sample and hold capacitor is converted to a digital representation and a determination is made whether the external condition represents an alarm situation, e.g., smoke detected from a fire.

External conditions, e.g., smoke, temperature, humidity, humidity, pressure, flow rate, etc., affects a sensor's characteristics, wherein the sensor provides a current output representative of its characteristics as affected by the external conditions. The current output of the sensor is coupled to a sample and hold capacitor for a precision time period thereby charging the sample and hold capacitor to a voltage proportional to current provided by the sensor over the precision time period. The voltage on the sample and hold capacitor is converted to a digital representation and a determination is made whether the external condition represents an alarm situation, e.g., smoke detected from a fire.

A system and method for cleaning the fire detection sensor of a fire detection device, such as a smoke detector, includes flowing halocarbon liquid over the fire detection sensor. A pump continuously recirculates the halocarbon liquid between a sensor holder and a reservoir, while a cleaning action is applied by an agitator to the fire detection sensor while it is under a stream of the liquid or in a bath of the liquid. The halocarbon liquid is typically an industrial electronics cleaner such as Novec™, which removes dirt, dust, grease and oil from the fire detection sensor without harming electronic components.

Various methods, systems, and devices for identifying a condition of a battery-powered device are presented. For example, a device may include a smoke detection sensor that detect smokes and, in response to detecting smoke, generate a smoke detection signal. The device may include test circuitry that tests an aspect of the battery-powered device. The device may include an audio output device that outputs a sound in response to the test circuitry determining a particular condition is present. The device may include a proximity detector that monitors for a wave movement of an object within a distance of the battery-powered device and generates a proximity detection signal when the proximity detector detects the wave movement performed by the object within the distance of the smoke detector device.

Various methods, systems, and devices for identifying a condition of a battery-powered device are presented. For example, a device may include a smoke detection sensor that detect smokes and, in response to detecting smoke, generate a smoke detection signal. The device may include test circuitry that tests an aspect of the battery-powered device. The device may include an audio output device that outputs a sound in response to the test circuitry determining a particular condition is present. The device may include a proximity detector that monitors for a wave movement of an object within a distance of the battery-powered device and generates a proximity detection signal when the proximity detector detects the wave movement performed by the object within the distance of the smoke detector device.

Disclosed is a smoke detector comprising: a housing including a base, the base including a planar surface configured for being positioned against and attached to a ceiling, a printed circuit board (PCB) comprising a substantially planar shape with a front surface and an opposing back surface spaced in a thickness direction T, and a plurality of perimeter edges including a bottom edge and an opposing top edge spaced in a height-wise direction H, a first side edge and an opposing second side edge spaced in a transverse direction, wherein the top edge comprises a first projection extending in the height-wise direction away from the top edge, the first projection including a first temperature sensor height-wise spaced from the top edge, and the PCB is mounted to the housing so that the front surface of the PCB is perpendicular to the planar surface of the base.