Device and method for detecting misconnection of electric meters

A device for detecting electric meter misconnection, comprising a master detection device and a slave detection device,

• wherein the master detection device is connected to electric meters in an electric well;
• the master detection device comprises:
• a master RS485 communication circuit, a master high-frequency signal generation circuit, a master signal modulation circuit, a master key, a master main control chip, a master E2PROM and a master signal line trap;
• the slave detection device comprises:
• a high-frequency carrier signal detection circuit, a high-frequency carrier signal demodulation circuit, a slave data processing module, a slave main control chip and a slave E2PROM connected in sequence;
• an input terminal of the master RS485 communication circuit is connected to the electric meters, an output terminal of the master RS485 communication circuit is connected to the master main control chip, and the master RS485 communication circuit is configured to acquire communication address information of the electric meters;
• an input terminal of the master high-frequency signal generation circuit is connected to the master main control chip, and an output terminal of the master high-frequency signal generation circuit outputs high-frequency signals of different frequencies generated by the master high-frequency signal generation circuit;
• the master signal modulation circuit is configured to:
• encode the communication address information of the electric meters acquired by the master RS485 communication circuit to generate a self-defined protocol and encoded information;
• acquire the high-frequency signals of different frequencies generated by the master high-frequency signal generation circuit;
• modulate the self-defined protocol into the high-frequency signals to obtain high-frequency carrier signals;
• and feed the high-frequency carrier signals into outlet terminals of the electric meters, wherein the high-frequency carrier signals comprise a first high-frequency carrier signal transmitted to a power grid and a second high-frequency carrier signal transmitted to a user air switch;
• the master key is connected to the master main control chip and is configured to input a preset high-frequency carrier signal frequency;
• the master E2PROM is connected to the master main control chip and is configured to store the communication address information of the electric meters and the preset high-frequency carrier signal frequency;
• the master signal line trap is connected to the electric meters and is configured to absorb the first high-frequency carrier signal and a high-frequency interference signal transmitted from the power grid to the outlet terminals of the electric meters;
• the high-frequency carrier signal detection circuit is provided with a detection antenna and is configured to:
• detect the second high-frequency carrier signal adjacent to the user air switch;
• amplify the detected second high-frequency carrier signal to obtain a third high-frequency carrier signal;
• and transmit the third high-frequency carrier signal to the high-frequency carrier signal demodulation circuit;
• the high-frequency carrier signal demodulation circuit is configured to demodulate the third high-frequency carrier signal to obtain a target high-frequency carrier signal frequency, and acquire the preset high-frequency carrier signal frequency and the encoded information transmitted by the master detection device;
• the slave data processing module is connected to the slave main control chip and is configured to perform a protocol analysis on the encoded information and the second high-frequency carrier signal according to the self-defined protocol to obtain the communication address information of the electric meter corresponding to users;
• and
• the slave E2PROM is connected to the slave main control chip and is configured to store the preset high-frequency carrier signal frequency, the target high-frequency carrier signal frequency, and the communication address information of the electric meter obtained by the slave data processing module.