WELDING ELECTRIC POWER MEASURING METHOD FOR HIGH-FREQUENCY WELDING EQUIPMENT

摘要

PURPOSE:To calculate welding electric power with high accuracy and to stabilize the welding by measuring in a time series the high-frequency voltage and a high-frequency current which change at a high speed to store these in a storage device and afterward, transmitting the stored measured data to an arithmetic unit to calculate these. CONSTITUTION:The high-frequency welding electric power Pw is obtained by an oscillator 1 of a resonance circuit 2. The high-frequency voltage ep and the high-frequency current ip are measured by a high-frequency voltage measuring instrument 7 and a high-frequency current measuring instrument 8 respectively. Since the measured values are temporarily stored in the storage device 9, the arithmetic unit 10 can take in and calculate the measured values regardless of the sampling speed and the general purpose arithmetic unit can be appropriated. Furthermore, since crest values of the high-frequency voltage and current are sampled in a time series, many crest values are calculated and the high-frequency voltage whose crest value is variable can be calculated on the average and the welding electric power is detected with the high accuracy and a welding state can be stabilized.