Contact: Xu Yi Tel: 18073173363 QQ: 946289802 Tel 0731-84931455 E-mail 946289802@139.com official website www.hunanzh.com Hunan KWANG Automation Technology Co., Ltd. is a commitment to the promotion of instruments and agents well-known brands of automated instrumentation Sales, a professional pre-sale and after-sale technical team, customers can be tailored to provide on-site technical services as one integrated company. The company mainly engaged in Finland Metso Metso positioner, Metso meter solution, ABB instrumentation, within ABB inverter board spare, Bailey system spare parts, ABB medium voltage switchgear VD4, ABB positioner, US VALTORC fluid equipment, Metso conventional models are available from stock, the price definitely has the advantage, product quality is guaranteed. So the research and development of intelligent valve positioners imminent. Principles and general locator smart valve positioner to microcontroller core is different. It is used in microcontroller as the core control circuit, which accepts setting the valve opening current signal from the regulator, the use of this signal with the actual opening signal fed back from the position sensor are compared, if the microprocessor to give a deviation signal outputs a corresponding signal to control the actuator. If the feedback signal is greater than the set signal, the control cylinder exhaust; if the feedback signal is smaller than the set signal, the control cylinder intake; if the two signals are equal, the executive body does not move, so as to achieve accurate positioning of the spool. System hardware design chip select ATmega16 AVR microcontroller family for high-performance, low-power eight microprocessors, which use a reduced instruction set, the system is relatively stable, strong processing capability. In addition, it integrates a wealth of peripheral modules,> / D module,; / A module, watchdog circuit, in the use of time greatly reducing the volume of space. Since the AVR family of microcontrollers with ultra-low power consumption, powerful data processing, after taking into account the time required to use a lot of computing in the gray prediction algorithm, considering we chose 100023932 (2010) 0420064203AVR series ATmega16 microcontroller. The chip operating voltage of 4 @ 5 ~ 5 @ 5V, which has 40 pins, asynchronous or synchronous serial communication choose to communicate, there are eight chip 10> / D converter, integrated functionality and cost are more appropriate .