| 摘要 |
In a remote reading system to read values displayed in a remote local office in a central office, the local office is provided with a digit wheel, a plurality of permanent magnets arranged on one side of the digit wheel in accordance with predetermined decimal - binary codes and a plurality of passive oscillators closely adjacent the digit wheel, a predetermined number of the passive oscillators being assigned to one bit of the codes whereas the central office is provided with a single oscillator of variable frequency or a plurality of oscillators of different frequencies assigned to the passive oscillators, a plurality of filter receivers responsive to oscillation frequencies of the passive oscillators, a binary-decimal converter for the outputs from the filter receivers, means to display the output from the converter, and a modulator. Each of the passive oscillators operates to resonate to a frequency assigned thereto and sent from the central office when the passive oscillator comes to face one of the permanent magnets and the different oscillation frequencies are applied from the central office simultaneously to the passive oscillators in the local office through the modulator which connects the passive oscillators with the filter receivers to read in the central office the digits in the digit wheel.
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