Controllable jet-propelled sensor device and calibration method and system thereof

Abstract

The invention discloses a controllable jet-propelled sensor device. The controllable jet-propelled sensor device comprises a sensing device body with one or more gas sensors. An airflow channel is formed in the probe end of the sensing device body. An air suction device is arranged in the airflow channel and used for being controlled to operate so as to guide external airflow to flow through the airflow channel. The airflow channel is provided with an outlet pipe for generating impact airflow to an external monitored environment. The diameter of the outlet pipe is smaller than that of the airinlet of the airflow channel. The sensor device can accelerate external airflow to pass through the probe end of the sensor, shorten the sensing time of the sensor and improve the sensing efficiency.The self-calibration function is achieved, testing calibration of the sensor is conducted through quantitative release of testing gas, the situation that the sensitivity of the sensor drifts over timecan be calibrated easily, and the monitoring sensitivity is improved. The invention further provides a self-calibration method and system. The monitoring accuracy of the sensor is improved, the maintenance cost of the sensor is reduced, and the service life of the sensor is prolonged.

Description

technical field [0001] The invention relates to the technical field of sensor monitoring, in particular to a controllable jet sensor device and a calibration method and system thereof. Background technique [0002] Gas sensors are sensors used to detect the composition and content of gases; some of their important applications are for the impact and hazard monitoring of various gases on industrial production, family / social security, environmental monitoring and medical care, so people are sensitive to gas Sensitivity, performance and lifetime of the sensor put forward higher and higher requirements. [0003] Especially in the field of pipe gallery monitoring and management, it is necessary to set up a variety of gas sensors to monitor the smoke, methane, carbon dioxide, hydrogen sulfide gas, carbon monoxide and other gases in the pipe gallery in real time to ensure the safe operation of the pipe gallery facilities. [0004] Under normal circumstances, the above-mentioned va...

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Problems solved by technology

[0005] 1. Slow induction monitoring: Due to the long pipe gallery and large space, in order to save construction costs, the internal gas sensor groups often have problems with insufficient layout or insufficient sensitivity of the sensing performance; at the same time, the gas flow in the pipe gallery is poor, When a fire breaks out in a certain corner of the pipe gallery, or a harmful gas leaks in a certain area / position, it takes a long time for the gas to flow naturally to the sensor position, which may delay the best fire protection, maintenance, rescue and even escape timing, causing immeasurable harm and loss;

[0006] 2. Performance failure: Common failures of sensors mainly include accuracy degradation, drift deviation and fixed deviation; when the sensor has an accuracy degradation failure, the measurement accuracy will be lower and lower, and the measurement performance will be worse and worse, which directly affects the normal operation of the sensor Use; drift fault is that as time goes by, the difference between the actual value and the measured value of the sensor is getting larger and larger; the fixed deviation is that the difference between the actual value and the measured value of the sensor is a constant constant, which belongs to the low processing accuracy of the sensor itself The above-mentioned various faults are likely to make the sensor detection data inaccurate, and then have a negative impact on the online monitoring of the pipe gallery

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