| 摘要 |
PURPOSE: A superimposed pulsating current signal generating apparatus and a sensed signal output apparatus are provided to achieve improved accuracy of detection of a position of electric leakage of a power line of a street lamp by using both AC waveform and DC waveform. CONSTITUTION: A superimposed pulsating current signal generating apparatus comprises an AC power input unit(260), a DC power supply unit, a waveform generating unit(266), a power amplifying unit(269), a pulse signal generating unit(273), a transformer unit(276), and a waveform output unit(280). The AC power input unit is connected to a distribution board so as to receive an AC voltage. The DC power supply unit converts the AC voltage input through the AC power input unit into a DC voltage. The waveform generating unit operates by the DC voltage transmitted by the DC power supply unit, and generates a superimposed pulsating signal having a predetermined frequency. The power amplifying unit boosts up the voltage of the superimposed pulsating signal generated by the waveform generating unit in accordance with the first transform ratio. The pulse signal generating unit operates by the DC voltage transmitted by the DC power supply unit, and converts the superimposed pulsating signal generated by the waveform generating unit and amplified by the power amplifying unit into an intermittent signal. The transformer unit boosts up the superimposed pulsating signal converted into an intermittent signal in accordance with a second transform ratio. The waveform output unit is connected in parallel to a power line of a street lamp, and transmits the superimposed pulsating signal boosted by the transformer unit to the power line of the street lamp. |
