Beijing Lewei IOT Technologies Co., Ltd.
lewei

3 Phase Energy Monitoring Devices

The utility model relates to a circuit device for a phase detector of a high-voltage three-phase power supply, in particular to a phase detector of a 3 phase energy monitoring devices using a wireless working mode. The device comprises a first sending device, a second sending device and a receiving device; The first sending device and the second sending device have the same circuit structure. They both include a sending antenna, a signal acquisition and processing circuit and a phase signal modulation circuit. The receiving device has a first receiving antenna circuit, a first demodulation circuit, a first low pass filter circuit, a second receiving antenna circuit, a second demodulation circuit, a second low pass filter circuit, a microprocessor and a liquid crystal display driver circuit. The utility model has the advantages of intuitive reading, complete functions, convenient operation and good safety.

The 3 phase energy monitoring devices is characterized as follow: it is composed of a first sending device, a second sending device and a receiving device; The first sending device and the second sending device have the same circuit structure. They both include a sending antenna and a signal acquisition and processing circuit

The energy frequency phase signal output end of the transmitting antenna and the signal acquisition and processing circuit is connected with the energy frequency phase signal input end of the phase signal modulation circuit and the energy frequency phase signal input end of the window comparison circuit. The output end of the modulated low-frequency signal of the phase signal modulation circuit, and is connected with the sending antenna. The sending signal input end of the signal acquisition and processing circuit. The receiving device has a first receiving antenna circuit, a first demodulation circuit, a first low pass filter circuit, a second receiving antenna circuit, a second demodulation circuit, a second low pass filter circuit, a microprocessor and a liquid crystal display driver circuit; The first receiving antenna circuit passes through the first demodulation circuit and the first low pass filter circuit successively, and then it is connected to a signal input end of the micro-processing unit. The second receiving antenna circuit passes through the second demodulation circuit and the second low pass filter circuit successively, and then it is connected to another signal input end of the microprocessor. The display signal output end of the micro-processing unit and is connected to a liquid crystal display drive circuit; In addition, a power circuit is respectively connected with the part of the power input of the microprocessor and the LCD driver circuit.

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