| DAIHEN CORPORATION Patent applications |
| Patent application number | Title | Published |
|---|
| 20120084037 | HIGH FREQUENCY MEASUREMENT APPARATUS AND CALIBRATION METHOD FOR HIGH FREQUENCY MEASUREMENT APPARATUS - A method for calibrating voltage and current detected by a high frequency measurement apparatus is provided. By the method, a basic calibration parameter for a wide impedance range but with low accuracy and quadrant-specific calibration parameters for highly accurate calibration are calculated. This calculation is performed based, on values obtained by measuring three reference loads and true values of the reference loads. A first calibration unit of the apparatus calibrates the detected voltage and current by using the basic calibration parameter. A quadrant determining unit of the apparatus determines in which quadrant an impedance calculated from the calibrated voltage and current lies. A second calibration unit of the apparatus further calibrates the voltage and current by using a quadrant-specific calibration parameter corresponding to the determination result input from the quadrant determining unit. | 04-05-2012 |
| 20120076245 | SIGNAL DETECTION APPARATUS - A signal detection apparatus detects the frequency of an input signal without using a PLL. The detection apparatus includes a first and a second orthogonalizer, a phase difference calculator and an integrator, to control the variable coefficient a | 03-29-2012 |
| 20120019267 | HIGH FREQUENCY DETECTION DEVICE AND COAXIAL CABLE INCLUDING THE SAME - The present invention provides a high frequency detection device that detects a high frequency voltage signal according to a high frequency voltage generated in a power transmission body. The high frequency detection device includes a substrate and a capacitance conductor fixed to the substrate. The capacitance conductor includes a penetration portion and a capacitor electrode. In the penetration portion, the power transmission body is disposed so as to extend along the penetration portion in a state in which the axial direction of the power transmission body and the substrate are substantially orthogonal. The capacitor electrode is provided to be opposed to the power transmission body. | 01-26-2012 |
| 20110285412 | CURRENT DETECTION PRINTED BOARD, VOLTAGE DETECTION PRINTED BOARD, AND CURRENT/VOLTAGE DETECTOR USING SAME, AND CURRENT DETECTOR AND VOLTAGE DETECTOR - A current detection printed board includes: a board having a penetration hole that penetrates the board; and at least one wire that is formed in a coiled shape having both ends by penetrating the board along the periphery of the penetration hole and alternately connecting a front surface layer and a rear surface layer of the board, wherein, when a conductor, in which an AC current flows, is disposed to pass through the inside of the penetration hole, a current flowing in the wire is output through electromagnetic induction. | 11-24-2011 |
| 20110262251 | WORKPIECE CONVEYING SYSTEM - A workpiece conveying system includes at least three workpiece storage chambers arranged in a predetermined arrangement direction. A conveyance chamber is provided adjacent to the workpiece storage chambers. A workpiece processing chamber is provided adjacent to the conveyance chamber on the side opposite the workpiece storage chambers. First and second workpiece conveying robots are disposed in the conveyance chamber. The workpiece conveying robots are controlled by a controller and convey workpieces between the workpiece processing chamber and the workpiece storage chambers. The first and second workpiece conveying robots are spaced from each other in the arrangement direction. Each workpiece conveying robot conveys a workpiece into and out of at least two of the workpiece storage chambers. | 10-27-2011 |
| 20110252921 | INDUSTRIAL ROBOT - The present invention relates to an industrial robot and aims to provide an industrial robot capable of ensuring a long distance from a rotation axis of an arm to a tool mounting portion and accurately positioning the tool mounting portion by a compact structure. In a swing arm | 10-20-2011 |
| 20110252915 | INDUSTRIAL ROBOT - The present invention is characterized by arranging a flow path | 10-20-2011 |
| 20110238360 | METHOD FOR EVALUATING RELIABILITY OF ELECTRICAL POWER MEASURING DEVICE - A method is provided for evaluating the reliability of an electrical power measuring device for measuring high-frequency electrical power. To build an evaluation system, the measuring device, together with a reference electrical power measuring device, is arranged between a high-frequency power supply device and an artificial reproduction load, which includes an impedance conversion device and a reference load. Using this system, an uncertainty range of an electrical power measured value measured by the measuring device is calculated, according to a prescribed calculation formula, from the electrical power measured value, and a judgment is made as to whether or not the electrical power measured value measured by the measuring device is within the uncertainty range. If it is within the uncertainty range, the measuring device is evaluated as being reliable, while if it is not within the uncertainty range, the measuring device is evaluated as being unreliable. | 09-29-2011 |
| 20110238356 | HIGH-FREQUENCY MEASURING DEVICE AND HIGH-FREQUENCY MEASURING DEVICE CALIBRATION METHOD - A method is provided for calibrating voltage values and current values detected by a high-frequency measuring device. In a first step, a first parameter is calculated based on impedances calculated when the measuring device is connected to a first set of three reference loads and impedances of the first set of three reference loads. In a second step, plasma processing is carried out with the measuring device connected to a load to be measured, and detected voltage and current values are calibrated using the first parameter, and impedances as viewed from a connection point towards the load side are calculated based on the calibrated voltage and current values. In a third step, three impedances that encompass, when displayed on a Smith chart, a narrower range than a range encompassed by the impedances of the first set of three reference loads are determined, where the narrower range includes the impedances calculated in the second step. In a fourth step, a second parameter is calculated based on impedances calculated when the measuring device is connected to a second set of three reference loads respectively having the three impedances and also on impedances of the second set of three reference loads. In a fifth step, the measuring device is connected to the load to be measured, and detected voltage and current values are calibrated using the first parameter and the second parameter. | 09-29-2011 |
| 20110238215 | PROGRAMMING METHOD FOR A ROBOT, PROGRAMMING APPARATUS FOR A ROBOT, AND ROBOT CONTROL SYSTEM - An operator inputs a sensing instruction at a sensing point, which is a rough taught point, in a teaching mode (S | 09-29-2011 |
| 20110234201 | HIGH-FREQUENCY MEASURING DEVICE AND HIGH-FREQUENCY MEASURING DEVICE CALIBRATION METHOD - A method is provided for calibrating a high-frequency, measuring device so as to accurately measure high-frequency parameters within a chamber. A calibration parameter is calculated from impedance of a first set of three reference loads measured by a high-frequency measuring device and the true values of those impedances. A calibration parameter is calculated from an S parameter measured between a connection point where the high-frequency measuring device is connected and the inside of the chamber of a plasma processing device. An impedance within the chamber is calculated from a voltage signal and a current signal calibrated using the above calibration parameters. A second set of three reference loads, which include the impedance calculated in Step | 09-29-2011 |
| 20110222243 | POWER SUPPLY APPARATUS INCLUDING FAN FOR AIR COOLING - A power supply apparatus includes an air path extending longitudinally, a fan that blows air into the air path in a direction intersecting a longitudinal direction of the air path, and a plurality of electronic components arranged in the longitudinal direction. Each of the electronic components is cooled by air passing through the air path. With this configuration, it is possible to efficiently cool the electronic components without compromising the flexibility of arrangement of the various electronic components. Also, a dust removal operation can be readily performed without the possibility of damaging the fan. | 09-15-2011 |
| 20110115466 | CURRENT DETECTION PRINTED BOARD, VOLTAGE DETECTION PRINTED BOARD, CURRENT/VOLTAGE DETECTION PRINTED BOARD, CURRENT/VOLTAGE DETECTOR, CURRENT DETECTOR AND VOLTAGE DETECTOR - A current detection printed board includes: a board having a penetration hole that penetrates the board; and at least one wire that is formed in a coiled shape having both ends by penetrating the board along the periphery of the penetration hole and alternately connecting a front surface layer and a rear surface layer of the board, wherein, when a conductor, in which an AC current flows, is disposed to pass through the inside of the penetration hole, a current flowing in the wire is output through electromagnetic induction. | 05-19-2011 |
| 20110063883 | INVERTER CONTROL CIRCUIT AND INTERCONNECTION INVERTER SYSTEM HAVING THAT INVERTER CONTROL CIRCUIT - An inverter control circuit ( | 03-17-2011 |
| 20110010006 | ROBOT CONTROL SYSTEM - A robot control system has a portable operating device TP and a robot control device RC. The portable operating device TP is actuated by a rechargeable secondary battery and used to operate a robot R. The robot control device RC is capable of wireless communication with the portable operating device TP and performs automatic operation of the robot R based on teaching data provided by the portable operating device TP. The robot control system causes an emergency stop of the robot R when the wireless communication between the portable operating device TP and the robot control device RC is interrupted. The robot control system further includes a charging device CU, a connection monitoring section | 01-13-2011 |
| 20100277843 | HIGH-FREQUENCY POWER SUPPLY SYSTEM - A high-frequency power supply system includes an anomaly detector | 11-04-2010 |
| 20100259247 | CURRENT DETECTION PRINTED BOARD, VOLTAGE DETECTION PRINTED BOARD, CURRENT/VOLTAGE DETECTION PRINTED BOARD, CURRENT/VOLTAGE DETECTOR, CURRENT DETECTOR AND VOLTAGE DETECTOR - A current detection printed board includes: a board having a penetration hole that penetrates the board; and at least one wire that is formed in a coiled shape having both ends by penetrating the board along the periphery of the penetration hole and alternately connecting a front surface layer and a rear surface layer of the board, wherein, when a conductor, in which an AC current flows, is disposed to pass through the inside of the penetration hole, a current flowing in the wire is output through electromagnetic induction. | 10-14-2010 |
| 20100254172 | PWM SIGNAL GENERATOR, AND INVERTER EQUIPPED WITH THIS PWM SIGNAL GENERATOR - The PWM signal generator of the present invention generates a first pulse waveform in which a first on-time ΔT | 10-07-2010 |
| 20100224343 | WORK CARRIER - A work carrier includes a work carrying mechanism, a cooling pipe for cooling the work carrying mechanism by circulation of a coolant, a thermally-conductive elastic member held in contact with the work carrying mechanism and the cooling pipe, and a fixing element for fixing the cooling pipe to the work carrying mechanism. The elastic member is made of aluminum, for example. Before fixed, the elastic member is bent in a cross section perpendicular to the longitudinal direction of the cooling pipe. | 09-09-2010 |
| 20100213181 | Arc Start Control Method - An arc start control method comprises starting advance of a welding wire, and determining that a distal end of a welding wire contacts a base material and short circuit is caused. If a feed torque value is a reference torque value or greater, the welding wire is retracted and the distal end of the welding wire is separated from the base material without generating an arc. If the feed torque value is smaller than the reference torque value the welding wire is retracted and the distal end of the welding wire is separated from the base material and an initial arc is generated between the welding wire and the base material. | 08-26-2010 |
| 20100209217 | WORK TRANSFER APPARATUS - A work transfer apparatus includes a hand mechanism, a scissors lift mechanism, a seat, and a rotary mechanism. The hand mechanism supports and reciprocates a work. The scissors lift mechanism supports the hand mechanism, and moves the hand mechanism vertically, i.e., raises or lowers it. The seat supports the scissors lift mechanism. The rotary mechanism rotates the seat around a vertical axis. The scissors lift mechanism includes a stage on which the hand mechanism is mounted, at least one scissors link, and a lift driver. | 08-19-2010 |
| 20100206852 | Forced Pressure Power Supply Torch - A welding torch | 08-19-2010 |
| 20100196124 | WORK TRANSFER APPARATUS - A work transfer apparatus includes a work carrying mechanism, a driving source that drives the work carrying mechanism, a sealed box that accommodates the driving source in a hermetically sealed state, and a coolant circulation path provided in the sealed box for cooling the driving source. The sealed box includes a box body with an opening, and a partition lid for closing the opening. The partition lid includes an outer plate member and an inner plate member superposed on the outer plate member. The coolant circulation path is disposed at the interface between the outer plate member and the inner plate member. | 08-05-2010 |
| 20100193486 | ARC START CONTROL METHOD - To start consumable electrode arc welding, an initial current is supplied to a welding wire after causing the welding wire to contact a base material and retracting the welding wire from the base material. In this manner, an initial arc is generated. The welding wire is retracted continuously for an initial arc lift period Ti with the initial arc maintained. Afterwards, the initial arc is switched to a steady arc. A predetermined weld pool formation period Tp is set after the initial arc lift period Ti. In the weld pool formation period, a weld pool formation current greater than the initial current is supplied with the initial arc maintained and the welding wire is caused to proceed and fed to the base material. In the weld pool formation period, a weld pool is formed by the initial arc without allowing the welding wire to release droplets and contact the base material. By this method, the initial arc is switched to the steady arc state after the weld pool has been formed. This suppresses generation of spatter caused by transfer of the droplets to the base material. | 08-05-2010 |
| 20100181296 | PULSE ARC WELDING METHOD - A pulse arc welding method is provided for performing welding by causing welding current to flow through a welding wire and a base metal via a power supply tip. The welding current has a pulse cycle made up of a first peak time, a second peak time and a base time. A first peak current is applied during the first peak time, a second peak current, smaller than the first peak current, is applied during the second peak time, and a base current is applied during the base time. When a tip-base distance between an end of the power supply tip and the base metal is smaller or greater than a reference value, the first peak current is increased or decreased in accordance with the difference between the reference value and the tip-base distance. | 07-22-2010 |
| 20100176904 | CURRENT DETECTION PRINTED BOARD, VOLTAGE DETECTION PRINTED BOARD, AND CURRENT/VOLTAGE DETECTOR USING SAME, AND CURRENT DETECTOR AND VOLTAGE DETECTOR - A current detection printed board includes: a board having a penetration hole that penetrates the board; and at least one wire that is formed in a coiled shape having both ends by penetrating the board along the periphery of the penetration hole and alternately connecting a front surface layer and a rear surface layer of the board, wherein, when a conductor, in which an AC current flows, is disposed to pass through the inside of the penetration hole, a current flowing in the wire is output through electromagnetic induction. | 07-15-2010 |
| 20100155383 | AC PULSE ARC WELDING CONTROL METHOD - A control method for AC pulse arc welding performed upon application of cyclic AC welding current is provided. The welding current has a cycle including an electrode negative polarity period and an electrode positive polarity period subsequent to the electrode negative polarity period. In the control method, an electrode negative polarity base current and a subsequent electrode negative polarity peak current are applied during the electrode negative polarity period. The electrode negative polarity base current has an absolute value smaller than a first critical value, and the electrode negative polarity peak current has an absolute value greater than the first critical value. Then, an electrode positive polarity peak current is applied during the electrode positive polarity period. The electrode positive polarity peak current has a value greater than a second critical value. | 06-24-2010 |
| 20100038345 | CONSUMABLE ELECTRODE GAS SHIELD ARC WELDING TORCH AND POWER FEED TIP - A consumable electrode gas shield arc welding torch ( | 02-18-2010 |
| 20090309531 | SERVO MOTOR MONITORING APPARATUS - Disclosed a servo motor monitoring apparatus including: a magnetic pole position calculating member to extract a magnetic pole position signal of the servo motor from a motor drive line connected to the servo motor; a present position signal inputting member to receive an input of a present position signal from the position detecting member attached to the servo motor; and a monitoring member to compare operations of the servo motor based on two types of signals of the magnetic pole position signal and the present position signal of the servo motor, and to output a stop instruction signal for cutting off a power supply to the servo motor when detecting disagreement. | 12-17-2009 |
| 20090058398 | CURRENT/VOLTAGE DETECTION PRINTED BOARD AND CURRENT/VOLTAGE DETECTOR - A printed board, includes: a first shield portion, configured to reduce an influence of an electric field in combination with a casing accommodating the printed board, at least a part of the first shield portion being formed with a plurality of through holes; and a second shield portion, configured to reduce the influence of the electric field in combination with the casing, at least a part of the second shield portion being formed with a plurality of through holes, wherein the second shield portion is arranged alongside of the first shield portion. | 03-05-2009 |
| 20090035114 | Transfer apparatus - A transfer apparatus includes a stationary base, a lift base, a lifting mechanism for vertically moving the lift base, a rotary base mounted to the lift base, a rotating mechanism for rotating the rotary base about a vertical rotation axis, a linear moving mechanism supported by the rotary base, and a work hand supported by the linear moving mechanism. The lifting mechanism includes a slide guide mechanism for vertical movement of the lift base, and first and second screw-feeding mechanisms. Each screw-feeding mechanism includes a rotatable vertical screw shaft, and a nut member provided on the lift base and screwed onto the screw shaft. The first and the second screw-feeding mechanisms are spaced from each other, with the rotation axis of the rotary base being located between the first and the second screw-feeding mechanisms. | 02-05-2009 |
| 20090032513 | Arc welding power source - An arc welding power source supplies a start current, a welding current and a crater current as an output current in accordance with an activating signal supplied from outside. The power source includes a start period setting unit, a crater period setting unit, and a current control unit that controls the output current. The current control unit causes the power source to supply the start current and the welding current consecutively while the activating signal is in an on-state, where the start current is supplied for the start period, and the welding current is supplied for the period following the start period. The current control unit also causes the power source to supply the crater current after the activating signal is turned off, where the crater current is supplied for the crater period. | 02-05-2009 |
| 20090026186 | Pulse arc welding method - In pulse arc welding, a welding wire is fed at a rate corresponding to a current average set value. An arc is struck by passing a peak current for a peak period and a base current for a base period, where the peak and base periods make one pulse period. The arc transfers a droplet from the wire. The peak period includes a first peak period for a first peak current and a second peak period for a smaller second peak current. The first peak period and current are determined so that an arc anode point is formed at the top of the droplet even if the shield gas mixing ratio deviates from a standard value. The second peak period and current are determined so that one droplet is transferred during every pulse period, and beads are formed with no undercuts. | 01-29-2009 |
| 20080279656 | Transfer apparatus - A transfer apparatus includes a stationary base, a swivel rotatably supported by the stationary base, and a linear movement mechanism supported by the swivel and including guide rails. Hands for carrying works are supported by the guide rails and movable along a horizontal straight travel path by the operation of the linear movement mechanism. A heat reflector is provided between the hands and the guide rails. A refrigerant circulation channel includes annular spaces for ensuring constant communication between a passage on the side of the stationary base and a passage on the side of the swivel. The refrigerant circulation channel includes cooling pipes held in contact with the heat reflector. | 11-13-2008 |
| 20080273957 | Transfer apparatus - A transfer apparatus includes a stationary base, a swivel rotatable around a vertical rotation axis, a linear movement mechanism supported by the swivel, a hand supported by the linear movement mechanism for transferring a work along a horizontal path, a driving power source in the stationary base, and a transmission shaft arranged along the rotation axis for transmitting driving force from the driving power source to the linear movement mechanism. The linear movement mechanism includes a driving mechanism and a guide rail for movably supporting the hand. The driving mechanism has a plurality of pulleys, including a driving pulley supported rotatably around a horizontal axis, and an output belt wound around the plurality of pulleys for reciprocal movement within a predetermined section extending parallel to the movement path. The hand is connected to the output belt via a connection member. | 11-06-2008 |
| 20080260503 | Transfer apparatus - A transfer apparatus includes a stationary base, a swivel supported by the stationary base to be rotatable about a vertical axis, a guide member mounted on the swivel, a linear movement mechanism supported by the swivel or the guide member, a hand supported by the linear movement mechanism and moved by the linear movement mechanism for carrying a work along a straight and horizontal travel stroke, a drive source disposed inside the stationary base, and a transmission shaft disposed along the vertical axis to transmit drive power from the drive source to the linear movement mechanism. The swivel includes an upper section and a lower section detachably connected with each other. The upper section has a connecting member supported by the upper section to be rotatable about the vertical axis. The connecting member has a detachable engagement member for engagement with the transmission shaft from the above. | 10-23-2008 |
| 20080237208 | Feed control method for consumable electrode AC arc welding - A feed control method is provided for consumable electrode AC arc welding, in which the welding wire is fed at a predetermined wire feed rate, and a welding voltage applied to an arc is switched in alternation between electrode positive polarity and electrode negative polarity. In the method, a welding current setting signal is generated, and the wire feed rate is set to a first feed rate during a period of the electrode positive polarity, based on both the wire welding characteristics for the electrode positive polarity and the welding current setting signal. Further, the wire feed rate is set to a second feed rate during a period of the electrode negative polarity, based on both the wire welding characteristics for the electrode negative polarity and the welding current setting signal. | 10-02-2008 |
| 20080237172 | Transfer apparatus - A transfer apparatus includes a fixed base, a swivel, a lift mechanism for raising and lowering the swivel relative to the fixed base, a swivel mechanism for turning the swivel about a vertical swivel axis, a linear movement mechanism supported by the swivel, and a hand supported by the linear movement mechanism for transportation of a work along a linear horizontal travel stroke. The lift mechanism includes N (N is an integer equal to or greater than 2) lift members arranged for telescopic expansion and retraction relative to the fixed base. The lift mechanism also includes N lift drive mechanisms each for raising and lowering one of the lift members relative to an immediate lower-stage lift member. The swivel is supported by an uppermost one of the lift members. (FIG. | 10-02-2008 |
| 20080223840 | Squeezing detection control method for consumable electrode arc welding - A squeezing detection control method is provided for consumable electrode arc welding. The method includes a step of detecting a droplet squeezing phenomenon by checking that a change in a voltage or resistance between the consumable electrode and base material reaches a squeezing detection reference value, and a step of executing output control for rapidly decreasing a welding current passing through a short-circuited load when the squeezing phenomenon is detected, so that arc re-striking occurs in a state of low current. The squeezing detection reference value is set to a first value during the electrode positive polarity, and set to a second value during the electrode negative polarity. The second value is different from the absolute value of the first value, and each of the first and the second values is set such that the resultant welding state is satisfactory. (FIG . | 09-18-2008 |
