With the progress of science and technology, the current agricultural facilities (also known as factory farming) for solving the problem of automation, science and technology has become a new industry of agriculture. Facility agriculture is with the aid of greenhouse and its supporting device to regulate and control crop production environmental conditions of new agricultural production mode, is an effective hand segment of agriculture from natural constraints, is to regular the revolutionary development of agriculture, is of high yield, high efficiency, high quality and technology intensive agriculture. Abroad in recent years, such as Israel, the Netherlands and other countries in the facility agriculture research and production has reached a high level. Our country in recent years, as the main body of the plastic greenhouse and greenhouse facilities agriculture is developing rapidly, but compared with foreign, widespread low content of science and technology, production level in labor intensity and low benefit. Therefore, an urgent need to technical improvement, in order to improve the overall level of facility agriculture in China.

In order to achieve a high level of facility agriculture and agriculture, rural areas and farmers services, involves the key technology of information acquisition method is one of the most important key technologies. Therefore, developing agriculture with high ratio of performance facilities sensor is the top priority. As the sensor technology the development direction of the new century, I think the attaches great importance to the sensor in the application of facility agriculture is imperative, it is also a heavy one way to promote the industrialization of sensor.

Facility agriculture with the variety of sensors is more, according to the score the test parameters, mainly has the following kinds:

Temperature and humidity: (1) the growth of crops has close relationship with temperature and humidity, plastic greenhouse control parameters, temperature and moisture degree of detection and control is one of the main parameters.

(2) the FDR soil moisture sensors: crops need water, how to infuse water in facility agriculture, do not affect crop growth and waste of water resources is of vital importance. Soil moisture detection, need to use soil moisture sensors. At present the widespread adoption of FDR principle of soil moisture sensors by four pin type stainless steel needle as part monitoring sensor.

(3) : NDIR infrared CO2 crop growth and development cannot leave the photosynthesis, and photosynthesis are associated with CO2, so control the concentration of CO2, is conducive to crop growth and development.

(4) light: the facility agriculture, the cultivation management automation systems with a light source for artificial light, completely without sunlight, USES the light sensor to detect and control of light intensity, make crops can get uniform illumination.

(5) the soil nutrient, soil nutrient depends on fertilization, fertilization can not only improve crop yield, but also can avoid too fat and cause unnecessary loss. The determination of soil nutrients including soil organic matter, pH, n, p, k and exchangeable calcium and magnesium. Determination of soil nutrient, widely used in ion, biological sensors.

Due to the facility agriculture with sensor is play a role in the system, so the performance of the sensor must meet the following requirements:

(1) long-term stability with sensor using the environment of agricultural facilities more severe than industrial, such as high temperature, high humidity. Sensing device to a higher long-term stability, therefore, need to solve the key technology involved in the stability of the sensor including material, process, etc.

(2) to adapt to the system requirements the essence of the facility agriculture is to realize the artificial regulation and control of crop growth environment conditions, is through a closed loop system. So the performance of the sensor should be adapted to control system. Especially the consistency of the stationing, long distance sensor sensitivity of sensor, the sensor response time, etc., so as to make the system truly rapid response and control environment and efficient work.

(3) good price performance ratio due to large amount, so must demand, its price is low, otherwise difficult to promote.

Due to the low level of agricultural modernization in our country, agricultural facilities just started, so for the sake of the development of facilities agriculture, must from the sensor production in the process of exploration, reduce costs as far as possible, in order to meet the performance requirements.

The development in the application of the new strategy, I think should be in mobilizing the enthusiasm of sensor production enterprises at the same time, but also to prevent the rush and low levels of repetition. Sensitive electronic industry association, therefore, should have a unified planning, to carry on the macroeconomic regulation and control, make the sensors applied in facility agriculture development step by step, in an orderly way to sustainable development.