Spot-type smoke-sensing and temperature-sensing fire detector field inspection and calibration method and system

Abstract

The invention relates to a spot-type smoke-sensing and temperature-sensing fire detector field inspection and calibration method, which comprises the following steps of: raising a test cavity, and covering the test cavity outside a fire alarm to be detected; enabling the handheld control end to select a test gear matched with the to-be-tested fire alarm and send an instruction with a corresponding smoke concentration range value and / or a temperature range value to the main controller on the test cavity; after receiving the instruction, enabling the main controller correspondingly to raise the temperature and / or smoke concentration in the test cavity, and start the air return unit to perform smoke uniformizing and / or temperature uniformizing in the test cavity; and enabling the main controller to receive the smoke concentration and / or temperature value, monitored by the detection sensor, of the test cavity, and stopping the rising operation when the smoke concentration and / or temperature value reaches a required range value. The method is simple in structure and good in applicability, can simulate a standard smoke box test environment, can also simulate a temperature rise test standard, and can carry out scientific and accurate quantitative performance test on the fire detector to judge the effective degree of the fire detector.

Description

technical field [0001] The invention relates to the technical field of on-site inspection and calibration of fire-fighting equipment, and more specifically relates to an on-site inspection and calibration method and system for a point-type smoke-sensing and temperature-sensing fire detector. Background technique [0002] At present, the on-site detection method of point-type smoke fire detectors is mainly stick incense and smoke type. The stick incense and smoke type is to use the stick incense to ignite and insert it into the bong, and use the fan in the bong to blow the smoke into the detector maze. , when the smoke reaches a certain threshold, the fire detector will generate an alarm signal to achieve the purpose of the test. [0003] Incense sticks can release a large amount of soot and smoke oil after being ignited, which will adhere to the components and metal mesh in the detector. Using stick incense and smoke for a long time will cause aging and pollution of detector...

AI Technical Summary

Problems solved by technology

However, smoke detectors installed in buildings may become inaccurate after a period of use and require regular inspections. The current standard smoke box is only suitable for the calibration of smoke detectors before installation, and cannot check the smoke detectors in use. Smoke detectors for on-site testing (i.e. online testing)

[0005]The conventional method is to disassemble the smoke detector in use and then take it to the fire department for detection using a standard smoke box, and this detection method is not an online detection , so the smoke detector cannot be calibrated accurately, and often the disassembled smoke detector passes the inspection, but it still fails after reinstallation

On the other hand, the standard smoke box has a large volume and structure, the operation process is complicated and cumbersome, and the detection cost is high, so it is difficult for general grass-roots calibration units to carry out this work;

[0006]In addition, the point-type heat detector function tester is mainly a hot air blower or a lighter, which cannot control the test environment, and the measured data has low reference value

[0007] In summary, the current on-site detection equipment for fire detectors is relatively simple, and only simple qualitative and basic function tests can be performed on fire detectors to preliminarily judge whether the fire detectors are in good condition , but it is impossible to conduct scientific and accurate quantitative performance tests on fire detectors to judge the effectiveness of fire detectors. A method and system for on-site inspection and calibration of point-type smoke and temperature-sensitive fire detectors that can overcome this problem is needed

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