Smoke detector sensitivity detecting device based on obscuration principle

Abstract

The invention belongs to fire safety detecting equipment, relating to a smoke detector sensitivity detecting device based on the obscuration principle. The device provided by the invention is structurally characterized by comprising a testing loop, an aerosol generator, an air flow control fan and a processor, wherein the testing loop is composed of a testing barrel, a reflow tube, a testing room and a transparent smoke cup; and a smoke concentration detecting system based on the dimming principle is arranged in the testing room, and is composed of an alignment optical system, an absorption pool, a photoelectric detector and a galvanometer. When the device provided by the invention is used for detecting, aerosol smoke enters the absorption pool, the photoelectric detector receives the absorbed light intensity information after an incident light is absorbed and attenuated by the aerosol in the absorption pool, an obscuration coefficient can be obtained through the data processing, then the detected smoke concentration is obtained to be displayed on the liquid crystal display of the processor and compared with a standard concentration of a smoke detector alarm, the quantitative detection on the flexibility of the smoke detector can be realized depends on the alarming of an audible and visible alarm.

Description

technical field [0001] The invention novelly provides a smoke detector sensitivity detection device based on the light reduction principle, which belongs to fire safety detection equipment. Background technique [0002] With the enhancement of people's awareness of fire safety, automatic fire alarm systems are widely used in various buildings. Therefore, it is very necessary to regularly detect and maintain the sensitivity of smoke detectors in fire alarm systems to ensure their normal operation. . The usual way to test the smoke detector is to use the burning incense stick as the smoke source, and use the air pump or fan to introduce the smoke into the smoke sensing chamber of the smoke detector through a specific flue for testing. However, the disadvantages of this method are mainly as follows: 1. During the intermittent period of the detection process, because there is not enough oxygen, the incense stick is easy to extinguish, which brings difficulties to the detection,...

AI Technical Summary

Problems solved by technology

However, the disadvantages of this method are mainly as follows: 1. During the intermittent period of the detection process, because there is not enough oxygen, the incense stick is easy to extinguish, which brings difficulties to the detection, and the detection efficiency is low; 2. The speed of rising smoke is not easy to control , and the smoke rise time is long; 3. The sensitivity of the system can only be detected qualitatively. When the smoke does not reach the alarm concentration, it cannot accurately judge whether the performance of the smoke detector is intact; 4. The smoke oil is easy to adhere to The inner wall of the flue is not easy to clean

Images