Detection method for alarming miner's lamp with methane sensor

Abstract

The invention relates to a method for detecting the methane alarm safety lamp, which can improve the alarm veracity. It comprises following steps: preparing gas samples with upper and lower limits; feeding the gas sample with upper limit to the sensor to be detected; if the result is no, sending the alarm signal as disqualification, then sending the alarm signal as qualification, and removing said gas sample, feeding the gas sample with lower limit to the sensor to be detected; if the result is not, sending the alarm signal as qualification, and sending the alarm signal as disqualification, removing said gas sample, when the two detected results are both qualification, said safety lamp can be used, while any one result is disqualified, the safety lamp should be corrected or maintained. The invention can be used to detect variable methane alarm safety lamps.

Description

Technical field: [0001] The invention relates to an inspection method for a special application of an alarm device, especially an electrochemical inspection method; Background technique: [0002] During the operation of coal mines, gas explosions occur from time to time, which not only cause huge economic losses, but also seriously endanger the lives of people. For this reason, the national standard has set limits and allowable deviations for the methane content in the air in mines. In order to comply with the above regulations, the following measures are taken in production. [0003] 1. Set up fixed monitoring points, install sensors at appropriate positions in the roadway, and transmit their measurement signals to the inspection station. When the amount of methane at this place exceeds the value, necessary measures to ensure production safety can be taken in time to maintain the safety of each sensor The information is accurate, and it is usually stipulated that there is ...

AI Technical Summary

Problems solved by technology

[0004] a. A limited number of fixedly deployed sensors cannot reflect all the conditions in the mine. If the number of distributed points is expanded, the cost of equipment and operation will increase greatly;

[0005] b. There are many factors that affect the accuracy of the sensor, such as sensor poisoning, ambient temperature and humidity, wind speed, vibration, etc. The current method of calibrating once every seven days, in actual implementation, if any day within this interval, the sensor loses its original calibration If the accuracy of the monitoring is not high enough, it will lead to the failure of monitoring. As a result, if the methane content is below the lower limit of the limit value, the alarm will cause downhole confusion and inaction. explosion hazard;

[0006] c. Regardless of whether the sensor is malfunctioning or not, all sensors must be calibrated once within the seven-day period. Among them, for a large number of qualified products, a cumbersome procedure and a high-cost calibration operation will not only waste time, but also be economical. The loss is also a factor that cannot be ignored