There is a 96-year patent
An energy meter IC card pre-charging device with leakage protection and the ability to prevent electricity theft
Application (patent right) Xing Weihua; Liu Yanqi
An energy meter IC card pre-collection device with functions of leakage protection and elimination of electricity theft, consisting of an energy meter, an IC card holder, a pulse counter, a circuit controller, a line tripper and a fixed It is composed of a shell with screw holes, and is characterized in that: the aluminum plate of the electric energy meter has a color mark; the pulse counter is composed of an infrared light-emitting tube (L2), an infrared receiving tube (L3), and a transmitting and receiving tube base ( 6) and corresponding wires, which can be bonded to the aluminum plate of the electric energy meter head at the position aligned with the color mark. The black Peugeot (12) on the aluminum plate constitutes a signal reading device; the line tripper includes a switch ( 4) The trip coil (13) and button (10) are all installed inside the housing (5). The housing (5) is connected to the distribution board of the energy meter through screws. Inject the plug tightly in the screw hole (15) at one time. The plastic sealing cap (9) with markings; the main circuit board (2) provides the working power of each control circuit by the power circuit connected to the power supply, and the input terminal of the single-chip microcomputer is connected to a power-off detection circuit, an undervoltage detection circuit, and a comparison circuit. The IC card holder is connected to the input terminal of the memory circuit, the comparator circuit is connected to the thyristor circuit and the external interface, and the output of the microcontroller circuit is connected to the alarm circuit.