Metering device and metering method

A metering device comprising:

• a Hall sensor configured to output a Hall voltage generated by a magnetic field generated from a power supply line;
• an analog-digital converter configured to receive a voltage signal between a minimum voltage value and a maximum voltage value to convert the voltage signal into a digital signal and output the digital signal;
• an output adjustment unit connected between the Hall sensor and the analog-digital converter, and configured to amplify and output the Hall voltage when the Hall voltage output from the Hall sensor is smaller than the minimum voltage value and output adjustment information that adjusted the Hall voltage;
• and
• a control unit connected to the analog-digital converter and the output adjustment unit, and calculate the digital signal output from the analog-digital converter and the adjustment information output from the output adjustment unit to calculate wattage.

A metering device comprising:

• a Hall sensor configured to output a Hall voltage generated by a magnetic field generated from a power supply line;
• an analog-digital converter configured to receive a voltage signal between a minimum voltage value and a maximum voltage value to convert the voltage signal into a digital signal and output the digital signal;
• an output adjustment unit connected between the Hall sensor and the analog-digital converter, and configured to attenuate and output the Hall voltage when the Hall voltage output from the Hall sensor is larger than the maximum voltage value, amplify and output the Hall voltage when the Hall voltage output from the Hall sensor is smaller than the minimum voltage value, and output adjustment information that adjusted the Hall voltage;
• and
• a control unit connected to the analog-digital converter and the output adjustment unit, and calculate the digital signal output from the analog-digital converter and the adjustment information output from the output adjustment unit to calculate wattage.

A metering method using a metering apparatus comprising a Hall sensor, an analog-digital converter configured to receive a voltage signal between a minimum voltage value and a maximum voltage vale to convert the voltage signal into a digital signal to output the digital signal, an output adjustment unit, and a control unit, the method comprising:

• (A) providing a magnetic field generated from a power supply line to a Hall sensor and outputting a Hall voltage;
• (B) attenuating and outputting the Hall voltage when the Hall voltage is larger than the maximum voltage value, and amplifying and outputting the Hall voltage when the Hall voltage is smaller than the minimum voltage value;
• (C) converting the signal output in step (B) into a digital signal and outputting the digital signal;
• and
• (D) reflecting adjustment information that attenuated or amplified the Hall voltage in step (B) and calculating wattage as the digital signal output in step (C).