A hydrogen concentration detector

Abstract

The invention discloses a hydrogen concentration detector, which is a hydrogen concentration detector based on the hydrogen sensitive element disclosed in the invention patent CN102180518B, including a hydrogen sensitive resistance sensor, a voltage divider circuit, a noise reduction filter circuit, an A / D conversion circuit, a single chip microcomputer and Control circuit, liquid crystal display circuit, alarm circuit, temperature and humidity acquisition circuit, clock circuit and serial port communication circuit; A / D conversion circuit includes ADS1256 module, temperature and humidity acquisition circuit includes temperature and humidity sensor DHT11 module; serial port communication circuit is used to communicate with the host computer Communication, to transmit the test results to the host computer for archiving and data analysis. The invention corrects the actually measured hydrogen concentration, combined with environmental temperature and humidity factors, and obtains the real hydrogen concentration value. The hydrogen concentration detector has the characteristics of high working temperature, long life, high sensitivity, short response time and good stability.

Description

technical field [0001] The invention relates to a hydrogen concentration detector, in particular to a hydrogen concentration detector based on niobium pentoxide nanowires to prepare hydrogen sensitive elements, and belongs to the technical field of hydrogen concentration sensing and measurement and control instruments. Background technique [0002] Hydrogen is a kind of renewable green energy, and it is more and more favored by people because of its non-pollution, high energy density and wide application range, and has been widely used in chemical, aerospace, military and other industries. However, hydrogen is a flammable and explosive gas, and it needs to be strictly controlled to prevent its leakage during use. Therefore, it is very important to study high-performance hydrogen sensors and their detection devices. [0003] At present, there are still many technical problems in the hydrogen sensors used in the market. For example, semiconductor-type hydrogen sensors need to ...

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Problems solved by technology

[0004] ① Cannot produce a response linearly related to hydrogen sensitive concentration in a wide hydrogen concentration range, the sensitivity is not high enough, and the response time is long;

[0005] ②The influence of temperature, humidity, pressure, etc. cannot be well resolved;

[0006] ③ Poor stability

[0008] On the other hand, due to the influence of ambient temperature and humidity, there is a certain error between the actual value and the true value of the hydrogen concentration during measurement. The existing hydrogen concentration detection instruments do not consider the influence of this aspect, so it is necessary to carry out real-time measurement of the hydrogen concentration. fix

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