Abstract: A grid interconnection system for a power grid includes: a storage battery; a power conversion device that converts power from the storage battery into AC; and an interconnection control device that supplies power from a commercial power supply to a load and supplies power from the power conversion device to the load when the commercial power supply fails. When the commercial power supply is restored, the interconnection control device starts supply of power from the commercial power supply to the load, and stops supply of power from the power conversion device to the load after the supply of power from the commercial power supply to the load is started.

Abstract: A welding power supply device includes an inverter for converting DC power into AC power outputted to a welding load, and a voltage circuit for superimposing a restriking voltage on an output to the welding load when the polarity of output current of the inverter switches. The voltage circuit includes a restriking capacitor charged with the re-striking voltage, a charging circuit to charge the capacitor with the restriking voltage, and a discharging circuit to discharge the voltage in the capacitor. The charging circuit includes a DC power supply and a booster to boost DC voltage from the DC power supply. The charging circuit charges the restriking capacitor in first and second states. In the first state, the DC voltage from the DC power supply is directly applied to the re-striking capacitor. In the second state, DC voltage boosted by the booster is applied to the restriking capacitor.

Abstract: A point group data synthesis apparatus includes: an image acquisition unit that acquires a plurality of images including a working target; a point group acquisition unit that acquires, for each of the images, point group data on a camera coordinate system with reference to a camera that photographs the images; a detection unit that detects each position on the camera coordinate system of a visual characteristic point commonly included in the respective images; a user coordinate system setting unit that sets a user coordinate system with reference to the position on the camera coordinate system of the characteristic point detected for each of the images; a coordinate conversion unit that converts, for each of the images, the point group data on the camera coordinate system into point group data on the user coordinate system; and a point group synthesis unit that synthesizes the point group data on the user coordinate system converted for each of the images together.

Abstract: Provided is a marker position registration device that can prevent an axial direction in a coordinate system from being erroneously registered when a position in a marker is to be registered. The marker position registration device includes a display control unit that causes an input form to be displayed, the input form allowing coordinates in a robot coordinate system corresponding to a specific portion of an industrial robot when the specific portion indicates a specific position in a marker to be input in association with a position identifier for specifying the specific position which is assigned to the marker and a registration unit that registers the specific position in the robot coordinate system on the basis of a content input to the input form.

Abstract: A high frequency power supply alternately outputs a first AC voltage and a second AC voltage to a plasma generator. The amplitudes of the first AC voltage and the second AC voltage are different from each other. An impedance adjustment device is disposed in midway of the transmission line of the first AC voltage and the second AC voltage. When the AC voltage output from the high frequency power supply is switched to a first AC voltage, a microcomputer changes the capacitance of a variable capacitor circuit to a first target value. When the AC voltage output from the high frequency power supply is switched to a second AC voltage, the microcomputer changes the capacitance of the variable capacitor circuit to a second target value.

Abstract: An impedance adjustment device includes a variable capacitor unit. A microcomputer changes the capacitance value of the variable capacitor unit by switching on or off PIN diodes included in n capacitor circuits separately. Thus, the impedance on the plasma generator side when viewed from a high frequency power supply is adjusted. When changing the capacitance value of the variable capacitor unit to a target capacitance value, the microcomputer changes the capacitance value to a relay capacitance value different from the target capacitance value. The microcomputer changes the capacitance value to the target capacitance value after the capacitance value is changed to the relay capacitance value.

Abstract: A high-frequency power supply device generates a high-frequency signal, periodically controls the amplitude or phase of the generated high-frequency signal, and outputs high-frequency power, magnitude of which is controlled on the basis of the high-frequency signal, amplitude or phase of which has been controlled. The high-frequency power supply device controls the amplitude or phase of the high-frequency signal such that the magnitude of the high-frequency power is a first level in a first period of a control cycle and is a second level in a second period of the control cycle which is different from the first period. The second level is lower than the first level. The high-frequency power supply device gradually decreases or increases at least one of the second level and the ratio of the length of the first period to the length of the control cycle, and gradually increases or decreases the first level.

Abstract: Proposed are techniques for simplifying the process of suppressing an increase in a reflected wave Pr due to IMD. A high-frequency power supply system for providing high-frequency power to a load includes: a bias power supply for supplying a bias power having a first frequency; a source power supply for supplying a high-frequency output having a second frequency higher than the first frequency and being frequency modulated with the first frequency; and a matching device including an impedance matching circuit for acquiring the bias power and the frequency modulated high-frequency output and achieving impedance matching between the source power supply and the load. The source power supply, in response to a trigger signal for timing having the first frequency, detects a reflected wave while causing a modulation start phase and a modulation amount gain to be varied, and determines an optimum modulation start phase and modulation amount gain that minimize the reflected wave.

Abstract: An arc welding control method for controlling welding in which a material of a welding wire is aluminum or an aluminum alloy, and a feed speed Fw of the welding wire is alternately switched between a forward feed period and a reverse feed period to repeat a short circuit period and an arc period, a welding current Iw is controlled so that an average value of maximum values of the welding current Iw during the short circuit period is 150 A or less. A reverse feed peak value Wrp during the reverse feed period is set so that an average value of time lengths of the short circuit period is 7 ms or less. Accordingly, the current value can be reduced when the short circuit is released and the lengthening in the short circuit period can be prevented, so that the spatter generation amount can be reduced.

Abstract: A robot teaching system includes: a robot position and attitude calculation unit that calculates positions and attitudes of a robot corresponding to respective teaching instructions and points between the respective teaching instructions included in a working program for operating the robot; an imaginary robot information generation unit that generates imaginary robot information corresponding to the respective teaching instructions and the points between the respective teaching instructions on a basis of the positions and attitudes of the robot; a teaching instruction selection unit that selects at least one of the respective teaching instructions included in the working program; and a display unit that displays the imaginary robot information on a basis of the selected teaching instruction. The robot teaching system is able to easily confirm the position and attitude of the robot in an arbitrary teaching instruction of the working program.

Abstract: The durability and detection accuracy of a sensor unit may possibly decrease due to radiation heat generated from work pieces while they are welded together. A sensor device 1 includes a sensor unit 2, a housing case 3, and a shielding member 5. The sensor unit 2 is a device for measuring the shapes of the work pieces W or the distance to the work pieces W. The housing case 3 houses the sensor unit 2 and has formed therein a pass-through portion 36a for laser beam projection and a pass-through portion 36b for detection that pass a laser beam L1 from a laser beam projection unit 21 and a laser beam L2 directed to a detection unit 22, respectively. The shielding member 5 is attached to the housing case 3, and shields radiation heat directed toward the lower surface of the housing case 3 among radiation heat generated while the work pieces W are welded together. The shielding member 5 is made of a material with lower thermal conductivity than that of the housing case 3.

Abstract: An arc welder includes a welding power supply, a forward/reverse welding wire feeder, and a controller for the power supply and the wire feeder. Welding is implemented by repeating unit welding steps each including a short circuit stage with the welding wire and a base material being short-circuited and an arc stage with an arc being generated between the wire and the material. A transition period continues from a starting point of the arc stage till the wire feeding rate reaches a forward maximum. An average welding current is defined as an average of the welding current during the short circuit and arc stages. Within the transition period, the controller sets a current suppression period during which welding current is smaller than the average welding current. Transition period length T0 and current suppression period length T1 are set to satisfy the inequality 0<T1/T0?0.8.

Abstract: A robot teaching system includes: a photographing unit that photographs an image including a welding target and a marker installed on an industrial robot; a camera coordinate system setting unit that sets a camera coordinate system on a basis of the marker included in the image; an operation path setting unit that sets an operation path of the industrial robot on a basis of a welding position of the welding target included in the image in the camera coordinate system; and a program generation unit that generates a working program, while converting the set operation path from the camera coordinate system into a robot coordinate system set in a robot control apparatus on a basis of a position of the marker installed on the industrial robot. The robot teaching system generates a working program allowing appropriate welding at a welding position.

Abstract: Provided is a marker detection apparatus able to easily detect the position of a marker and a robot teaching system using the same. A marker detection apparatus includes: a three-dimensional plane detection unit that detects a three-dimensional plane serving as a plane in a three-dimensional space on a basis of point group data acquired by a 3D camera; a two-dimensional plane image generation unit that projects point group data constituting the detected three-dimensional plane in a perpendicular direction based on the three-dimensional plane, thereby generating a two-dimensional plane image; a marker detection unit that detects a marker from the generated two-dimensional plane image; and a marker position calculation unit that, for the detected marker included in the two-dimensional plane image, calculates three-dimensional coordinates on the three-dimensional plane.

Abstract: Provided is a marker detection apparatus able to detect the position of a marker with high accuracy and a robot teaching system using the same.

Abstract: A power supply system includes multiple power supply devices including a first power supply device and a second power supply device that are connected in common to a load. The first power supply device calculates control information for controlling voltage or current to be output to the load and source information for obtaining the control information, and controls the output to the load based on the calculated control information while transmitting the source information to the second power supply device. The second power supply device receives the source information transmitted from the first power supply device, calculates control information based on the received source information, and controls the output to the load while detecting current to be output from itself to the load and transmitting current information to the first power supply device.

Abstract: A measurement device that performs a predetermined measurement task together with a plurality of other measurement devices is provided. This measurement device is provided with a sampling phase generator for generating a sampling phase for instructing a timing of sampling, and a communication unit for communicating with at least one of the plurality of other measurement devices. The communication unit transmits the sampling phase generated by the sampling phase generator to at least one of the plurality of other measurement devices. The sampling phase generator is configured to generate a third sampling phase, using an operation that is based on a generated first sampling phase and a second sampling phase received by the communication unit from at least one of the plurality of other measurement devices.

Abstract: Provided is a welding program production system that can increase efficiency of a welding operation by a welding robot. The welding program production system includes a display control unit that causes a plurality of candidate welding lines detected on the basis of an image of a photographed object to be welded to be displayed in superimposed relation on the image, an input receiving unit that receives an input to select the welding lines from among the plurality of candidate welding lines and an input to specify a welding order and a welding direction for each of the selected welding lines, and a program production unit that produces a welding program on the basis of the specified welding order and welding direction.

Abstract: The work program production system includes a photographing unit that photographs an image including an object to be welded, a coordinate system setting unit that sets a user coordinate system based on a marker included in the image photographed by the photographing unit, a point-group-data plotting unit that detects a specific position of the marker on the basis of the image, sets the detected specific position on point group data acquired by a distance measurement sensor that measures a distance to the object to be welded, and plots, in the user coordinate system, the point group data to which coordinates in the user coordinate system using the set specific position as an origin are given, and a program production unit that produces a welding program so as to allow a welding robot virtually placed in the user coordinate system to perform a welding operation on the basis of the point group data plotted in the user coordinate system, while avoiding interference with the point group data.