Intelligent gas sensor technology

A gas sensor belonging to the smart gas sensor is more accurate and more comprehensive in function than an ordinary gas sensor. Smart gas sensor technology to achieve the way the user understands it? Smart gas sensor technology is very complex, the following Xiaobian to tell you about it.

The smart gas sensor is a multifunctional gas sensor that is implemented by using high technology such as MEMS technology, thick film gas sensor manufacturing technology, thick film hybrid integrated circuit technology, computer neural network pattern recognition technology, and single chip microcomputer application. Compared with the traditional gas sensor, the integrated controller/processor enables the sensor to have logic function, two-way communication function or decision function.

Smart gas sensors are divided according to their implementation methods. The most important type is the installation of multiple gas sensors in the detection system, and then configure the corresponding processing circuit to realize intelligence; according to the interaction mode between the sensor system and the outside world, it can be divided into wireless sensors. Network type and wired sensor network type.

China started late in the research of smart gas sensors and technology lags behind. The Hefei Intelligent Machine Research Institute of the Chinese Academy of Sciences applied the technology of thick film gas sensor manufacturing technology, thick film hybrid integrated circuit technology, computer neural network pattern recognition technology, and single chip microcomputer application to research smart gas sensors.

The smart gas sensor implementation combines the gas sensor array with computer technology to form an intelligent gas detection system that consists of a gas-sensing array, a signal processing system, and an output system. A plurality of gas sensors with different sensitivity characteristics are used to form an array, and a gas recognition and concentration monitoring of the mixed gas is performed using neural network pattern recognition technology. The system can quickly and accurately identify gas properties, judge gas types, and sense gas information, and transmit information to the processing system to determine the degree of damage, form a disposal plan, and transmit it to the execution system for execution. At the same time, the type, nature and toxicity of common toxic, harmful, and flammable gases are input into the computer, and an accident handling plan is prepared based on the nature of the gas and entered into the computer. When a leakage accident occurs, the smart gas detection system will work according to the following procedures: enter the site → adsorption gas sample → gas sensor signal → computer identification signal → computer output gas type, nature, toxicity and disposal plan.

Smart gas sensors to achieve wireless, the main ways are:

● Sensors The sensors are connected via ZIGBEE to form a wireless sensor network and integrated into the computer. Then through the computer and GPRS wireless signal sent to the centralized control center, and then form a large sensor network through the Internet.

● Integrate the RFID wireless chip on the sensor, and then transmit the signal directly to the national wireless sensor network receiving station through the RFID wireless chip, and then integrate and connect through the dedicated Internet to form a national-level wireless sensor network.

● Integrate wireless sensors with WI-FI function on the sensor, and connect the Internet directly through the WI-FI network built in each city.

● Integrate the sensor into the GPRS wireless chip, upload the computer through the GPRS network, and upload the Internet to form the sensor network.

● Form a wireless sensor network through the wireless platform of a smart home.