Electric leakage induction alarm
The utility model discloses an electric leakage induction alarm comprising an AC voltage induction circuit, an MCU high-precision ADC chip, a voice circuit and a power supply module. The AC voltage induction circuit comprises a frequency magnetic induction coil used for inducing 50HZ AC, an operatio...
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Zusammenfassung: | The utility model discloses an electric leakage induction alarm comprising an AC voltage induction circuit, an MCU high-precision ADC chip, a voice circuit and a power supply module. The AC voltage induction circuit comprises a frequency magnetic induction coil used for inducing 50HZ AC, an operational amplifier circuit and a logic phase signal circuit. The frequency magnetic induction coil is connected to the MCU high-precision ADC chip through the operational amplifier circuit and the logic phase signal circuit. The MCU high-precision ADC chip is also electrically connected with a voice circuit and a power supply module. When in use, the frequency magnetic induction coil is used for inducing sine waves of alternating current frequency of 50HZ, the operational amplifier circuit and the logic phase signal circuit are used for synchronously feeding back induced signals to the MCU high-precision ADC chip, and the MCU high-precision ADC chip is used for analyzing whether an induced magnetic field is an alternati |
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