ЛИНЕЙНЫЙ ДЫМОВОЙ ПОЖАРНЫЙ ИЗВЕЩАТЕЛЬ

摘要

The proposed linear smoke detector can be used in automatic fire alarm systems designed for installation in large rooms. The increase of the optical density of air when smoke is present inside of the detector is detected by the change of the absorption of infrared radiation. The power supply of the detector elements from the two-wire fire alarm loop is provided at low current consumed by the detector, as the emitter of the detector generates short infrared radiation pulses with on-off time ratiomore than 30 000. The pulse power supply of the emitter and the receiver of infrared radiation provides a possibility to reduce the consumed current and indicate the duty operation mode of the detector.