Electromagnetic energy charging clamp meter

An electromagnetic energy charging clamp meter for inducing current from a test wire, comprising:

• an electromagnetic induction unit (2) electrically connected to a test wire (1) which generates a corresponding induced current according to changes in an electromagnetic field of the test wire (1);
• an automatic switching unit (3) electrically connected to the electromagnetic induction unit (2) and having a measurement terminal (30) and a charging terminal (31);
• a two-stage gear switching unit (4) electrically connected to the measurement terminal (30) of the automatic switching unit (3) and having a low-range measurement (40) and a high-range measurement (41);
• an AC/DC conversion unit (43) electrically connected to the two-stage gear switching unit (4) so as to convert the AC voltage from the two-stage gear switching unit (4) into DC voltage;
• a microprocessor calculation unit (5) electrically connected to the AC/DC conversion unit (43) so as to receive an output from the AC/DC conversion unit (43) and having a charging control output device (50) and a measurement control output device (51), where the charging control output device (50) is electrically connected to the automatic switching unit (3), and the measurement control output device (51) is electrically connected to the two-stage gear switching unit (4);
• a rectification unit (6) electrically connected to the charging terminal (31) of the automatic switching unit (3) so as to rectify the AC voltage from the automatic switching unit (3) into DC voltage;
• an energy storage unit (7) electrically connected to the rectification unit (6) so as to receive the DC voltage from the rectification unit (6) and convert the received DC voltage into a fixed voltage and store fixed voltage in a charging unit (70), and
• a rechargeable battery (72) electrically connected to the charging unit (70) so as to receive the fixed voltage from the charging unit (70) and provide power to the microprocessor calculation unit (5) through a DC/DC conversion unit (73).