矿用气体传感器智能调校系统
发布时间：2018-12-14 02:47
【摘要】：矿用气体传感器作为煤矿安全监控系统中的前端检测元件,能够实时对矿井下各种有毒有害气体浓度进行检测,是煤矿安全监控系统中的关键组成部分,其工作的可靠性和稳定性直接关系到整个安全监控系统能否正常判断矿井下各类有毒有害气的浓度是否超限,进而发出正确的动作命令以确保生产过程中各个环节的安全,目前国内煤矿中使用的气体传感器中的气体敏感元件绝大部分是使用电化学原理和热催化原理制成,由于这类元件的固有特性导致其在使用一段时间后会产生零点漂移和量程漂移等问题,为克服这些问题必须对其进行定期的参数校正。为了更好的服务于煤矿安全监控系统使其能够在第一时间做出正确判断保护操作人员和国家财产的安全,国家计量检定规程以及煤矿安全规程都对气体传感器的调校做出了具体明确的要求。为此依据矿用气体传感器工作原理和调校原理结合煤矿生产过程中的实际需要设计了一种基于C8051F020单片机为核心控制器件的矿用气体传感器智能校验系统,该系统由气路控制模块、气体传感器信号采集模块、红外调校模块、废气处理模块四部分组成,其中气路控制模块主要是完成在对矿用气体传感器调校过程中各种标准浓度气体的分配、自动切换和流量大小的精确控制,气体传感器信号采集模块主要是完成在调校过程中对被调的校批量气体传感器输出的表征浓度的电量信号进行采集为闭环控制提供反馈量,红外调校模块主要完成在调校过程中对传感器发送各种功能参数调校命令,是实现自动调校的关键核心模块,废气处理模块主要是实现调校过程中对调校环境中空气进行净化和无害化处理,保证在对有毒有害类气体传感器调校过程中调教人员的安全和调校用废气的达标排放,依托智能控制技术将四个模块有机结合在一起可以实现对矿用气体传感器进行批量智能调校。目前本系统已经成功试制样机处于试运行阶段,运行结果表明：该系统可以完全实现对矿用气体传感器整个调校过程的闭环控制,同时表现出良好的操控特性,具有调校精度高、抗干扰能力强、稳定性好等优点,有效的解决了有毒有害气体传感器的校正检定问题,为传感器的使用者和检定人员提供了完整可靠的传感器性能参数,实现了矿用气体传感器的无人值守调校。
[Abstract]:As the front-end detection element in the coal mine safety monitoring system, the mine gas sensor can detect the concentration of all kinds of toxic and harmful gases under the mine in real time, and it is a key component of the coal mine safety monitoring system. The reliability and stability of its work is directly related to whether the whole safety monitoring system can correctly judge whether the concentration of all kinds of toxic and harmful gases under the mine is over the limit, and then issue correct action commands to ensure the safety of every link in the production process. At present, most of the gas sensors used in domestic coal mines are made by using the principle of electrochemistry and the principle of thermal catalysis. Due to the inherent characteristics of this kind of elements, they will produce zero drift and range drift after using for a period of time. In order to overcome these problems, it is necessary to carry out periodic parameter correction. In order to better serve the coal mine safety monitoring system, it can make a correct judgment on the safety of the operators and national property at the first time. National metrology verification regulation and coal mine safety regulation have made specific and clear requirements for the adjustment of gas sensors. In this paper, an intelligent calibration system of mine gas sensor based on C8051F020 single chip microcomputer is designed according to the working principle and adjustment principle of mine gas sensor combined with the actual needs in the process of coal mine production. The system consists of four parts: gas path control module, gas sensor signal acquisition module, infrared adjustment module and exhaust gas treatment module. The gas path control module mainly completes the distribution of various standard concentration gases, automatic switching and accurate control of the flow rate in the calibration process of mine gas sensors. The signal acquisition module of gas sensor is mainly used to collect the electricity signal of the concentration of the adjusted batch gas sensor during the calibration process, which can provide feedback for the closed-loop control. The infrared calibration module mainly sends all kinds of functional parameter adjustment commands to the sensor during the calibration process, which is the key module to realize automatic calibration. The exhaust gas treatment module mainly realizes the cleaning and innocuous treatment of the air in the adjusting environment during the adjustment process, and ensures the safety of the personnel and the standard discharge of the exhaust gas in the course of adjusting the toxic and harmful gas sensors. Depending on the intelligent control technology, the four modules can be organically combined to realize batch intelligent calibration of mine gas sensors. At present, the prototype of the system has been successfully trial-produced. The running results show that the system can completely realize the closed-loop control of the whole adjustment process of the mine gas sensor, and at the same time it shows good control characteristics. It has the advantages of high calibration precision, strong anti-interference ability and good stability. It effectively solves the problem of calibration and verification of noxious and harmful gas sensors, and provides the sensor users and inspectors with complete and reliable sensor performance parameters. The unattended adjustment of mine gas sensor is realized.
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TD76;TP212
本文编号：2377767
[Abstract]:As the front-end detection element in the coal mine safety monitoring system, the mine gas sensor can detect the concentration of all kinds of toxic and harmful gases under the mine in real time, and it is a key component of the coal mine safety monitoring system. The reliability and stability of its work is directly related to whether the whole safety monitoring system can correctly judge whether the concentration of all kinds of toxic and harmful gases under the mine is over the limit, and then issue correct action commands to ensure the safety of every link in the production process. At present, most of the gas sensors used in domestic coal mines are made by using the principle of electrochemistry and the principle of thermal catalysis. Due to the inherent characteristics of this kind of elements, they will produce zero drift and range drift after using for a period of time. In order to overcome these problems, it is necessary to carry out periodic parameter correction. In order to better serve the coal mine safety monitoring system, it can make a correct judgment on the safety of the operators and national property at the first time. National metrology verification regulation and coal mine safety regulation have made specific and clear requirements for the adjustment of gas sensors. In this paper, an intelligent calibration system of mine gas sensor based on C8051F020 single chip microcomputer is designed according to the working principle and adjustment principle of mine gas sensor combined with the actual needs in the process of coal mine production. The system consists of four parts: gas path control module, gas sensor signal acquisition module, infrared adjustment module and exhaust gas treatment module. The gas path control module mainly completes the distribution of various standard concentration gases, automatic switching and accurate control of the flow rate in the calibration process of mine gas sensors. The signal acquisition module of gas sensor is mainly used to collect the electricity signal of the concentration of the adjusted batch gas sensor during the calibration process, which can provide feedback for the closed-loop control. The infrared calibration module mainly sends all kinds of functional parameter adjustment commands to the sensor during the calibration process, which is the key module to realize automatic calibration. The exhaust gas treatment module mainly realizes the cleaning and innocuous treatment of the air in the adjusting environment during the adjustment process, and ensures the safety of the personnel and the standard discharge of the exhaust gas in the course of adjusting the toxic and harmful gas sensors. Depending on the intelligent control technology, the four modules can be organically combined to realize batch intelligent calibration of mine gas sensors. At present, the prototype of the system has been successfully trial-produced. The running results show that the system can completely realize the closed-loop control of the whole adjustment process of the mine gas sensor, and at the same time it shows good control characteristics. It has the advantages of high calibration precision, strong anti-interference ability and good stability. It effectively solves the problem of calibration and verification of noxious and harmful gas sensors, and provides the sensor users and inspectors with complete and reliable sensor performance parameters. The unattended adjustment of mine gas sensor is realized.
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TD76;TP212
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