Reflective point type optical-fiber smoke-sensitive fire detector

Abstract

The invention discloses a reflective point type optical-fiber smoke-sensitive fire detector. The reflective point type optical-fiber smoke-sensitive fire detector comprises a front-end detecting part and a background processing part, wherein the front-end detecting part comprises a smoke chamber, a transmitting card frame, a reflecting card frame, a reflecting film, a transmitting optical cable, a receiving optical cable and a hard plastic pipe; the background processing part comprises a light source, a light source modulator and a signal detection processor; the light source is a green-light LED (Light-Emitting Diode); the transmitting optical cable and the receiving optical cable are communication level plastic optical cables; the transmitting optical cable and the receiving optical cable are arranged in the hard plastic pipe, and the transmitting card frame is arranged outside the hard plastic pipe; one end of the transmitting optical cable and one end of the receiving optical cable are level to an opening of the top end of the hard plastic pipe, and the other ends of the transmitting optical cable and the receiving optical cable are respectively connected with the light source and the signal detection processor; the reflecting film is arranged at the side surface of the reflecting card frame; and the transmitting card frame, the reflecting card frame and the hard plastic pipe are externally covered with the same smoke chamber. The design disclosed by the invention not only avoids using of electronic components and is applicable to places with inflammables and explosives and large electromagnetic radiation strength, but also can meet the requirement of a fire-fighting alarm product, and is high in sensitivity, simple in structure and low in installation and maintenance cost.

Description

technical field [0001] The invention relates to an automatic fire alarm device, in particular to a reflective point-type optical fiber smoke detector, which is particularly suitable for eliminating defects of electronic components, reducing costs, improving sensitivity, and facilitating maintenance, and has great practicability . Background technique [0002] At present, the smoke detectors used for automatic fire alarm at home and abroad mainly include three types: photoelectric, ion, and infrared beam (laser). They all have many problems in use, and it is difficult to meet the needs of automatic fire alarm in today's fire protection. [0003] The problem with the photoelectric type is: Because of the electrical signal, it is not suitable for installation in places with flammable, explosive and high electromagnetic radiation intensity, and there are certain potential safety hazards Electronic components are prone to aging, and after aging, they are prone to false alarm...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the defects and problems existing in the prior art of using electronic components to detect smoke, complex structure, and high production and maintenance costs, and to provide a device that prevents electronic components from detecting smoke, has a simple structure, and has low production and maintenance costs. reflective point fiber optic smoke detector

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