驾驶员酒精浓度检测装置设计(气体传感器)

大连交通大学2012届本科生毕业设计外文翻译

外文原文

1. Gas Sensor

1.1 gas sensor research and development

status sensing technology of information technology Bian Technology, in the aerospace,

military, the environment, security checks and other fields extensive use of gas gas sensor for

real-time monitoring, alarm, and in the food, chemical and other industrial areas also makes

extensive use of gas sensors for gas odor identification. Application of demand-driven gas

sensor technology of rapid growth, in domestic and international research in this area

continued to deepen, has developed many different types of gas sensors, can satisfy different

requirements of the occasion. Put gas sensors and specialized integrated circuit detection

analysis, specific gas to the quantitative detection of semi-quantitative analysis. In these gas

sensors, metal oxide semiconductor gas sensor is a result of the low prices, facilitate the mass

production of the feature, resulting in more applications[11].

Metal oxide semiconductor gas sensor is the use of a semiconductor material particles

specific gas adsorption surface resistivity value changes in the characteristics made, and it is a

resistance-type sensor, most were for the detection of flammable gas targets Resistance value

of its gas and the concentration of gas has some relationship. Traditional structure of the metal

oxide gas sensor is not only larger, and the huge power consumption is very high, In many

occasions, unable to meet the requirements of good, Meanwhile the demand of the market

requirements of the development of gas sensor devices use more convenient, cheaper price,

Therefore micro-sensor research and development is the inevitable direction of the continuous

development of sensor technology for the new generation of gas sensors Development has

laid a solid foundation. Using mature semiconductor microelectronics and thick-film

technology, thin film technology manufacturing gas sensors, micro-devices could be achieved,

Integration, and reduce the power consumption of devices, and sensor devices to enable mass

production, thus reducing the cost, Meanwhile sensor consistency and reliability can be

guaranteed. In the 20th century, since the 1990s, micro-machining (MEMS) technology to the

sensor manufacturing technology changes, MEMS technology used to create the gas sensor

performance has been further improved. Microelectronics Technology usually only for

two-dimensional structure of the manufacture, and the micro-machining technology can be

designed to create a three-dimensional structure of the micro-structure of gas sensors, Power

sensor device to enable a further decline in micro-sensor structure has many excellent

performance, small size, low power dissipation, working temperature can be precisely

measured and controlled, without environmental impact, low-cost mass production, 大连交通大学2012届本科生毕业设计外文翻译

consistency and reliability. Yi and signal acquisition and processing integrated circuits to

achieve intelligent[13].

A single sensor or separation of components due to the long-term stability and

selectivity of the problems unable to satisfactorily meet the requirements of practical

applications; and the other involves the use of sensors great deal of practical problems, to

analyze the object gas is a mixture of ingredients mixture, Mixed gas component

identification has become the gas measurement sensor technology research and development

at the summit. In a single sensor selectivity is relatively easy to improve the situation, can be

used in a number of sensor or change the working conditions of gas sensor signal extraction

feature to solve this discriminant a problem. Will be separate sensor combination comprising

sensor array, This access through the sensor signal from the original single-sensor arrays into

a single parameter of the multi-parameter, increasing the amount of information. At home and

abroad has been made many research units for the sensor array of research and has made great

progress. But only the combination of various sensors, it will be difficult to break narrow plot,

the actual application will be limited. Using micro-structure of the gas sensor easy integration

advantages, a number of gas sensor modules integrated in the same chip, Development of

micro-structure sensor array devices. Micro gas sensor array to meet the emergence of sensor

integration, functional and intelligent development. The species of miniature gas sensor array

has become the gas sensing technology currently a hot one direction, it maintains the structure

of the micro-sensors small size and low power consumption advantages, can effectively