Internal sensor market development and in various industrial applications

Internal sensor market development and in various industrial applications




Internal sensor market has yet to be developed, particularly in high-current sensor technology, lagging far behind international standards. However, as economic development, whether it is rail transport, or wind power and other new energy industries will spur demand for the development of sensor technology more and more sensors manufacturers sights on rail transport, new energy and other industries.



The wind industry to promote the development of traditional sensor technology



From the early days of human development, they put a wind power as an energy source to use, with the scientific and technological development, people have begun to use wind power more accurately.



Germany, Schleswig - Holstein is located between the North Sea and the Baltic Sea, even in the case of small wind, Rexroth produced by wind turbines can still run. If the wind changes from northwest to north 8 degrees, wind measurement instrument will be the sensor to the signal transmission to the control system to control the yaw drive to the cabin positioned to the right place. Wind measurement instrument including wind speed, wind direction sensors and sensors, along with the development of wind power industry to develop. In general, wind speed sensor should meet the measurement range of 0 ~ 60 m / s, the error range of 0.5 m / s within the working environment temperature should meet the local temperature conditions. The wind sensor should meet the measurement range of 0 ~ 360 degrees, an accuracy of 2.5 degrees within the working environment temperature should meet the local temperature conditions.



Institute of Electrical Engineering Chinese Academy of Sciences researcher Li Jianlin new energy group, "said the wind industry for measuring high voltage, large current sensors, vibration sensors, temperature, humidity, wind, and pressure sensors will be to promote product applications." which, because of current sensors is the wind turbine converters are essential components in the wind power industry, the application is particularly important. In some power inverter, the small and PCB installed with a current sensor is widely used. These sensors are part of the converter closed-loop control can ensure that the inverter quick response.



When the inverter and generator at the same time the use of intelligent power control, you can ensure that after the wind turbines to start a very wide range of wind speeds within the network to provide continuous power, until the wind turbines in the ceiling when you shut down until. In order to drive the best location, each converter in continuous current sensor will measure the quality of the circuit controller, and the response time and ultimately by the current sensor to determine the design and performance. This is a small current rating of the closed-loop current sensors are widely used in wind power industry causes. In addition to excellent linearity and accuracy, the closed-loop current sensor itself with a high bandwidth and fast response time and so on.



Li Jianlin pointed out that the domestic market has yet to be current sensor development, especially high-current sensor technology, lagging far behind international standards. As the domestic high-current sensor technology is relatively immature, the domestic wind power machine manufacturers in the procurement of high-current sensor, most would choose to imported products, due to the price of imported products is often higher than the price of domestic products, which to some extent, an increase the production cost pressure. In the small current sensor technology, the domestic technological level and international level there is not much difference.



As domestic wind power more than in "Three North" (north, northeast, northwest), and coastal areas, climate is relatively poor, therefore wind turbine performance requirements of the sensor higher, especially for heating function, earthquake resistance, anti - high-frequency electromagnetic interference, anti-reverse polarity (connect), and wind direction indicators such as ability to shock and vibration requirements of the sensor is far higher than the general performance indicators, while the tidal power station unit also requires sensors have good anti-corrosion water .



Li Jianlin told reporters, sensor applications in wind power industry, wind power is not confined to industry, on China's power industry, the use of sensors so many occasions. In the power plant, power stations mainly use pressure sensors, temperature sensors, flow sensors, mainly used in the field of power transmission voltage sensors, current sensors. They generally fall into technical level is not high but require a higher reliability and stability of common sensors, and require a higher level of technology of light sensors are now applied in the power sector is also less.



As the power plant, power plants are generally the sensor unit equipment vendors to choose from, so a relatively large internal sensor applications. Transmission field is different, the relative power generation, because the sensor is relatively small one-time investment, all the regional power grid when you select the brand is not very sensitive to price, but also to use some relatively new technology that can improve power transmission, and so the foreign brands of sensors applications are more common. "



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