An electric plug is disclosed which includes a detection circuit, which detects electric current and voltage and removes high frequency noises from power supply; an electric energy measuring and converting circuit, which receives detected signal from the detection circuit and outputs a corresponding electric energy signal; a microprocessor, which proceeds with electric energy signal processing, time counting and data storing processes according to the electric energy signal received from the electric energy measuring and converting circuit; a DC power supply circuit, which provides the necessary working voltage to the electric energy measuring and converting circuit and the microprocessor; and an LCD circuit, which displays electric energy and time data.
7495431 - Electric power cord with digital multimeter - Owned by Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd. (Shenzhen, Guangdong Province,CN) Hon Hai Precision Industry Co., Ltd. (Tu-Cheng, Taipei Hsien,TW)
An electric power cord includes a first plug adapted for connecting to a power source, a second plug adapted for connecting to an electric device, an electric cable, at least one sensor arranged on the electric cable, an meter chip arranged on the electric cable, and a display module arranged on the electric cable. The electric cable electrically connects the first plug and second plug. The at least one sensor collects electric characteristic analog signals of the electric cable. The meter chip receives and converts the analog signals to digital signals. The display module receives the digital signals and displays measured electrical characteristics of the electric device.
