Development trends and future prospects of gas sensors

Today, the field of oxygen detection instruments is in a period of rapid development of the industrial chain. Strong reliability, high sensitivity, long service life, trace element combustible gas detection are the goals of gas sensor technology progress, and the technological advancement of the Internet of Things is also a necessity for today's social and economic development.

1. Develop and design new gas-sensitive materials

New gas-sensitive materials are an important prerequisite for the further development of sensor technology. The scientific research on new gas-sensitive materials in our country pays more attention to the scientific research on semiconductor devices, structural ceramics and organic chemical high-analytical raw materials. Among them, the scientific research on semiconductor devices focuses on hydroxides and hydroxides and their hydroxides. Improving the gas-sensing properties of semiconductor materials mainly involves the use of mixtures to adjust the properties. For example, some organic chemical gas chemicals are added to the semiconductor device to improve the sensitivity of the sensor. Some methods are to add metal catalysts to the sensor. , this method can also adjust the overall selectivity of the gas-sensitive copy and adjust the response activity.

2. Miniaturization of gas sensors, intelligent systems, multi-purpose

With the continuous development of science and technology in our country, the level of sensor manufacturing technology has been greatly improved. Therefore, the processing speed of gas sensors is getting higher and higher, coupled with the improvement of China's micromechanical equipment and microelectronics technology, the volume of the sensor is getting smaller and smaller. MEMS technology integrates integrated circuit chips and sensors, which enables gas sensors to have the following advantages: reduced weight, smaller volume, high accuracy, low performance loss, good tolerances, etc. Especially after the completion of full automation technology, productivity has been greatly improved, and product costs have also been reduced.

The development of intelligent instrument systems is embodied in the microcontroller embedded in the gas sensor, which enables the gas sensor to have fault indication and automatic correction functions. In addition, the use of neuron networks and fuzzy theory in software development enables gas sensors to identify gas types and concentration values. For example, the new multi-channel flammable gas detection electronic nose is based on the liquid distribution image displayed by infrared cyclones and uses carbon dioxide lasers. The generator can handle more than 70 kinds of gases within the range of 9 meters to 11 meters.

Multi-purpose development means that the gas sensor detector can detect multiple parameters and complete the inspection and identification of various waste gases. For example, different CPUs are placed on a chip to complete the detection of various gas temperatures, temperatures, pressures, and air flow rates, thereby displaying the characteristics of the measured gas in a clinical environment. Show it in a more comprehensive way.

3. Integration of gas sensors and technologicalization of the Internet of Things

The future development direction of oxygen detectors is to use one instrument to detect a variety of gases. For example, photoionization testing instruments can detect a variety of volatile organic compounds; the portable multi-type oxygen detector produced by IST in the United Kingdom Nearly a thousand gas components can be detected. In addition, in recent years, major cities in China have been making every effort to build new smart cities. During the 13th Five-Year Plan period, China will also set up more than 100 new smart city demonstration sites.