Sensors (English name: transducer/sensor) is a kind of detection device, can feel the measured information, and will feel information transformation according to certain rule become electrical signal output, or other form of information needed to satisfy the information transmission, processing, storage, display, record and control requirements.

Sensor's features include: miniaturization, digital, intelligent, multi-functional, systematic and network. It is the first step of automatic detection and automatic control. The existence and development of the sensor, let objects have sensory, such as touch, taste and smell let objects become live up slowly. Usually according to its basic cognitive functions are divided into temperature sensor, light sensor, gas sensor, force sensor, magnetic sensor, moisture sensor, acoustic sensor, radiation sensitive element, color sensor and sensor etc. 10 major categories.

The main role

Sensors are widely used in various fields of social development and human life, such as industrial automation, agricultural modernization, space technology, military engineering, robotics, resource development, Marine exploration, medical diagnosis, environmental monitoring, security, transportation, household appliances, etc. [1]

According to forward-looking industry research institute published "China sensor manufacturing industry development prospects and investment forecast analysis report preview" shows that in recent years, domestic sensor applied mainly in machinery manufacturing, household appliances, scientific instruments, medical and health, communications, electronics and automobile, etc.

In order to obtain information from the outside world, people must use sensing sensor

The sensor

Officer. Sensors collect pictures selected (6) and people's own sense organs, alone in the study of natural phenomena and laws and their function in production activities is not enough. In order to adapt to this situation, it needs to sensor. So it can be said that the sensor is the extension of human facial features, also called features.

The arrival of the new technology revolution, the world begin to enter the information age. In the process of the use of information, the first thing to solve is to obtain accurate and reliable information, the sensor is access to natural and production information in the field of the main ways and means. Particle world, longitudinally to observe the celestial evolution for hundreds of thousands of years, short to s instant response. In addition, the understanding of deepening material, develop new energy, new materials such as plays an important role in all sorts of extreme technology research, such as ultra high temperature, temperature, ultra-high pressure and ultra-high vacuum, strong magnetic field, the ultra weak magnetic field, and so on. Obviously, for a large number of human senses can not directly access information, not appropriate to the sensor is not possible. Many barriers to basic science, first is the object information acquisition is difficult, and some new mechanism and the presence of the highly sensitive detection sensor, often lead to breakthroughs in this field. The development of some sensors, tend to be the pioneer of the development of some edge discipline.

Sensor has already penetrated into such as industrial production, the development, Marine exploration, environmental protection, resource investigation, medical diagnosis, biological engineering, and even the protection of cultural relics and extremely extensive areas. It is no exaggeration to say, from the vast space, to the mighty ocean, and all kinds of complicated engineering system, nearly every modern project, is inseparable from the various sensors. [2]

Therefore, sensor technology is important in the economic development, promoting social progress, it is very obvious. All countries in the world attach great importance to the development of this field. Believe in the near future, sensor technology will be a leap, reached new levels commensurate with its important status.

The main features

Sensor's features include: miniaturization, digital, intelligent, multi-functional, systematic and network, it not only promote the transformation and upgrading of traditional industries, but also possible to establish a new industry, becoming the new economic growth point in the 21st century. Miniaturization is built on a microelectronic mechanical system (MEMS) technology, on the basis of has been successfully applied in silicon devices made of silicon pressure sensor.

Proximity sensor project, is instead of non-contact detection approaches such as limit switches, with no contact detection object for testing for the purpose of the floorboard of the sensor.

Proximity sensor project is a member of the sensor in the family is very important, is very extensive application in industry. Although only close to the price of the sensor is not very high, but the factories are batch needs, so close to the sensor is also have very big market. At the mention of proximity sensor, everyone knows a famous figure, like, omron, balluff, etc, these sensors brand is quite a long time to occupy the proximity sensor is very big market.

Proximity sensor engineering project is mainly rely on domestic previous diagram, import brands, omron, balluff, proximity sensors due to the expensive imported, delivery cycle is long so you can't meet the needs of many customers, many domestic factories hoping to find domestic proximity sensor, in this case a lot of sensor manufacturers began to produce a proximity sensor, at first is imported machines and talent to generic import proximity sensor, but with the development of domestic sensor technology, now has many independent brands proximity sensor, to a great extent have been able to meet the needs of the domestic.

The current domestic many factories are using domestic proximity sensor or are trying to use domestic proximity sensor. Close to the sensor is no longer dependent on imported brands.