Charge induction method dust concentration detection device with strong anti-interference capability

Abstract

The invention relates to a charge induction method dust concentration detection device with strong anti-interference capability, which belongs to the technical field of dust concentration detection. The device comprises a shell, an inner cylinder, a motor, an inner cover plate, a signal processing circuit, a temperature and humidity sensor, an induction sheet and a shielding sleeve, wherein the induction sheet is attached to the inner wall of the inner cylinder; the shielding sleeve is arranged between the inner wall and the outer wall of the inner cylinder and covers the induction sheet; the signal processing circuit is arranged on the outer wall of the inner cylinder; the temperature and humidity sensor is arranged on the wall of the inner cylinder and used for collecting the temperature of dust passing through the hollow part of the inner cylinder; the inner cover plate covers the signal processing circuit and the temperature and humidity sensor; the shielding sleeve and the inner cover plate are connected with the induction sheet and the negative electrode of the temperature and humidity sensor; the signal processing circuit is connected with the induction sheet and the temperature and humidity sensor and used for processing and analyzing the collected dust electric signals and the temperature and humidity information of the environment. External electromagnetic interference can be eliminated, influence caused by particulate matter flow velocity change is eliminated, and accurate and stable online detection of dust particles is realized.

Description

technical field [0001] The invention belongs to the technical field of dust concentration detection, relates to the design of a dust sensor, in particular to a charge induction method dust concentration detection device with strong anti-interference ability. Background technique [0002] The currently used dust sensors are mainly optical method and electrostatic induction method. The optical method dust concentration sensor has problems such as optical window pollution and pipeline blockage, and requires frequent maintenance. Therefore, it is necessary to develop an electrostatic induction method with the characteristics of maintenance-free, low cost, simple structure, and high sensitivity. Method dust concentration sensor. [0003] The basic principle of electrostatic induction method dust concentration detection technology is based on the electrostatic induction mechanism. The interaction between charged dust particles and electrostatic detection electrodes induces changes...

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Problems solved by technology

According to the current products and the description and usage of the electrostatic induction method dust sensor in the existing literature, the dust concentration detection technology of the electrostatic induction method has the problems of unstable detection results and low detection accuracy, which are mainly caused by the following reasons: (1) The influence of external electromagnetic interference, the changing electromagnetic field of the outside world will have an impact on the detection results, such as the electrostatic interference of the human body, the electromagnetic interference generated by the switch closure, the interference generated by the frequency converter, etc.; With the increase of particle flow rate, the detection result of the sensor will increase, so that the detection error of the electrostatic induction method dust concentration sensor will increase; (3) The temperature and humidity in the environment have an impact on the electrostatic characteristics of particles. If the temperature and humidity of the environment change, the charge carried by the dust particles will change, which will affect the detection results of the sensor.

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