Dust concentration calibrating system and method suitable for photoelectric method dust concentration detector

Abstract

The invention provides a dust concentration calibrating system and method suitable for a photoelectric method dust concentration detector. The system comprises a power device, a dust prefabricating feeding device, a temperature transmitter, a pressure transmitter and a detector calibrating node device. The power device is used for providing power for circulation of gas containing dust. The dust prefabricating feeding device is used for preparing a dust sample with the known mass into dust gas with the prefabricating concentration, feeding the dust gas into the system and compensating for leakage gas. The temperature transmitter is used for measuring the temperature of the dust gas in the dust concentration calibrating system. The pressure transmitter is used for measuring the pressure of the dust gas in the dust concentration calibrating system. The detector calibrating node device is used for installing the dust concentration detector and measuring the leakage amount of the gas containing dust when the dust concentration detector is replaced. According to the dust concentration calibrating system and method suitable for the photoelectric method dust concentration detector, the calibrating steps of a traditional dust concentration detector are simplified, the detection efficiency is improved, and a precise calibrating result is obtained.

Description

technical field [0001] The invention relates to the calibration of a dust concentration detector, in particular to a dust concentration calibration system and method suitable for a photoelectric dust concentration detector. Background technique [0002] The method of measuring dust concentration based on optoelectronics has been widely used at present. Since my country's dust detection instrument industry started later than foreign countries, and the development level of high-end dust testers is relatively backward, the quality performance of related products is still relatively large compared with the international advanced level. gap. Although the results obtained by the method based on the determination of the quality of the filter membrane are relatively accurate, the test process is complicated, the duration is long, and the cost of building a calibration system is high, and the calibration efficiency is relatively low. For the dust detector using the fast photoelectric...

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Problems solved by technology

[0002] The method of measuring dust concentration based on optoelectronics has been widely used at present. Since my country's dust detection instrument industry started later than foreign countries, and the development level of high-end dust testers is relatively backward, the quality performance of related products is still relatively large compared with the international advanced level. gap

Although the results obtained by the method based on the quality measurement of the filter membrane are relatively accurate, the test process is complicated, the duration is long, and the cost of building a calibration system is high, and the calibration efficiency is relatively low

For the dust detector using the fast photoelectric detection method, there is currently a lack of a practical calibration system that is easy to promote. When the dust measuring instrument leaves the factory, the general manufacturer only does the test on linearity and repeatability, and finally it must be compared with the result of the quality measurement of the filter membrane. In contrast, relatively accurate results can be obtained only after the K value is calibrated. This method is inconvenient and is not conducive to the improvement of the industry level of photoelectric measuring dust detectors.

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