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公开(公告)号：US11846657B2
公开(公告)日：2023-12-19
申请号：US17668383
申请日：2022-02-10
Applicant: KABUSHIKI KAISHA YASKAWA DENKI
Inventor： Hiroyuki Kita
CPC classification number: G01R15/202 , G01R15/146 , G01R19/0092 , G06N7/01
Abstract: A current detection apparatus includes first current detection circuitry configured to detect a current flowing through a conductive wire with a shunt resistor connected to the conductive wire to obtain a first detected current value; second current detection circuitry configured to detect the current with a Hall element to obtain a second detected current value; a storage configured to store a first probability distribution information of the first current detection circuitry and a second probability distribution information of the second current detection circuitry; synthesis circuitry configured to convert the first and second detected current values into first and second probability distributions based on the first and second probability distribution information, respectively, and to synthesize the first and second probability distributions to obtain a synthesized distribution; and estimation circuitry configured to obtain an estimated current value via a maximum likelihood estimation based on the synthesized distribution.
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公开(公告)号：US20180250763A1
公开(公告)日：2018-09-06
申请号：US15906051
申请日：2018-02-27
Applicant: KABUSHIKI KAISHA YASKAWA DENKI
Inventor： Hiroyuki Kita , Masafumi Murakami
CPC classification number: B23K9/0953 , B23K9/0956 , B23K9/1006 , B23K9/173 , B23K31/125 , B23K2101/006
Abstract: An arc welding system includes an arc welding portion that executes an arc welding, an arc welding power supply that supplies a weld voltage and a weld current to the arc welding portion, an analyzer including analyzer circuitry that performs a frequency analysis on a time series waveform of at least one of the weld voltage and the weld current and generates frequency spectral data, and a determiner including determiner circuitry that obtains a welding state of a welding work by the arc welding portion based on the frequency spectral data generated by the analyzer.
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公开(公告)号：US10906116B2
公开(公告)日：2021-02-02
申请号：US15906051
申请日：2018-02-27
Applicant: KABUSHIKI KAISHA YASKAWA DENKI
Inventor： Hiroyuki Kita , Masafumi Murakami
Abstract: An arc welding system includes an arc welding portion that executes an arc welding, an arc welding power supply that supplies a weld voltage and a weld current to the arc welding portion, an analyzer including analyzer circuitry that performs a frequency analysis on a time series waveform of at least one of the weld voltage and the weld current and generates frequency spectral data, and a determiner including determiner circuitry that obtains a welding state of a welding work by the arc welding portion based on the frequency spectral data generated by the analyzer.
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公开(公告)号：US11852693B2
公开(公告)日：2023-12-26
申请号：US17812811
申请日：2022-07-15
Applicant: KABUSHIKI KAISHA YASKAWA DENKI
Inventor： Hiroyuki Kita
CPC classification number: G01R31/58 , G01R31/088
Abstract: A cable deterioration diagnosis device configured to diagnose deterioration of a cable having a plurality of electrical wires including one or more signal wires configured to transmit signals between a first device and a second device, and includes a test signal output unit configured to output a wave-like test signal to a test signal transmitting wire independent of the one or more signal wires among the plurality of electrical wires, a test signal extraction unit configured to extract a received test signal corresponding to the test signal from a signal propagated in a test signal receiving wire independent of the one or more signal wires and the test signal transmitting wire among the plurality of electrical wires, and a deterioration detection unit configured to detect the deterioration of the cable based on the test signal and the received test signal.
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