Online detecting device for response threshold value of smoke fire detector

Abstract

The invention relates to a portable online detecting device for the response threshold value of a smoke fire detector. The portable online detecting device comprises a smoke box lifting jack, a smoke box assembly and a data input / output human-computer interface system. The smoke fire detector is judged to be invalid when the known attenuation coefficient value of smoke concentration and the response threshold value of the smoke fire detector are larger than 0.05dBm<-1> while the smoke fire detector sends a fire alarm signal. The device is suitable for being used as a detecting device for the response threshold value of a smoke fire detector, which is used by a general basic checking unit; the using response threshold value of the smoke fire detector can be checked without dismounting the using smoke fire detector, so that the problem for checking the using response threshold value is solved, the fire safety is favorably ensured, and the situation that the response threshold value can not be checked through a forced safety check item in public places is also broken through.

Description

technical field [0001] The invention relates to a fire detector response threshold on-line detection device, in particular to a portable smoke-sensing fire detector response threshold on-line detection device. Background technique [0002] The smoke detector is a detector made by using the principle that the smoke generated in the event of a fire absorbs or blocks the light. When a fire occurs, smoke enters the detection chamber of the detector, and due to the action of smoke particles, the light emitted by the light-emitting element on the detector is scattered, and this scattering is received by the light-receiving element on the detector to generate a photosensitive current, thereby realizing The smoke signal is converted into an electrical signal, and the detector can judge the smoke concentration according to the size of the electrical signal and then send out an alarm signal. In general, the performance parameters of smoke detectors should be inspected and tested one ...

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)

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. However, because this detection method is not on-line detection, it cannot be accurately calibrated for the smoke detector, and often occurs when it is disassembled. After the smoke detector passed the inspection, but it still failed 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. It is difficult for general grass-roots calibration units to carry out this work.

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