22-06-2011 дата публикации
Номер: CN0101649631B
Принадлежит:
The invention relates to a wired remote transmission frequency-conversion water supply system through pressure signals, which comprises a pressure transducer, an intelligent regulator, a frequency-conversion speed controller, a motor, a water pump, a water supply pipeline, and the like, wherein power is supplied to the pressure transducer through a UPS AC power supply via the current terminal of an image current source on the water supply pipeline at the tail water using area of the pressure transducer; pressure signals are transmitted to the intelligent regulator through a telephone cable and the image end with image current in a wired way, and thus, a closed control system is formed. Wired remote transmission frequency-conversion water supply under constant pressure is realized, an image current circuit in the system eliminates the resistance of the wired cable as well as attenuation to the transmission signals after resistance change, the delay of pressure signals in the process oftransmission ...
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