Patents by Inventor Toshimichi Urakawa
Toshimichi Urakawa has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11820007Abstract: An abnormality detection device of detecting an abnormality of a robot which executes an operation such as welding on a target object, includes a control unit including a signal input unit to which a detection signal is input, the detection signal being obtained when a state of the robot is detected by a sensor, so that the control unit detects an abnormality of the robot in accordance with the detection signal. The control unit outputs a control signal to the robot so as to execute an integrated action in which a necessary action necessary for detecting an abnormality is added to a predetermined action in which the operation is not executed on the target object. The control unit detects the abnormality of the robot in accordance with the detection signal detected when the integrated action is executed.Type: GrantFiled: May 11, 2018Date of Patent: November 21, 2023Assignee: Nissan Motor Co., Ltd.Inventors: Yasuhiro Tanaka, Toshimichi Urakawa, Toru Takagi, Satoru Hirose
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Patent number: 11518034Abstract: A malfunction determination method for a production machine including a motor as a driving source of a rotating mechanism acquires sensor data of a sensor for detecting a condition of the production machine, determines whether the production machine has an operation stop period during which the production machine has stopped its operation for a predetermined period of time or longer in accordance with an operation history of the production machine, sets a malfunction determination suspension period for suspending a malfunction determination of the production machine when determined to have the operation stop period, in accordance with a length of the operation stop period, and determines whether the production machine has a malfunction in a period other than the malfunction determination suspension period.Type: GrantFiled: December 26, 2017Date of Patent: December 6, 2022Assignee: Nissan Motor Co., Ltd.Inventors: Yasuhiro Tanaka, Toshimichi Urakawa, Toru Takagi, Minoru Tomikashi
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Publication number: 20210191346Abstract: An abnormality detection device of detecting an abnormality of a robot which executes an operation such as welding on a target object, includes a control unit including a signal input unit to which a detection signal is input, the detection signal being obtained when a state of the robot is detected by a sensor, so that the control unit detects an abnormality of the robot in accordance with the detection signal. The control unit outputs a control signal to the robot so as to execute an integrated action in which a necessary action necessary for detecting an abnormality is added to a predetermined action in which the operation is not executed on the target object. The control unit detects the abnormality of the robot in accordance with the detection signal detected when the integrated action is executed.Type: ApplicationFiled: May 11, 2018Publication date: June 24, 2021Applicant: Nissan Motor Co., Ltd.Inventors: Yasuhiro Tanaka, Toshimichi Urakawa, Toru Takagi, Satoru Hirose
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Patent number: 10899023Abstract: A failure diagnosis device applicable to a mechanical device provided with motors independent of One another as sources to drive motion axes, respectively, and configured to acquire a moving position of each motion axis and a disturbance torque value applied to the motion axis every predetermined period, and to diagnose a failure of the mechanical device, includes a failure diagnosis unit configured to diagnose the motion axis as a failure when the disturbance torque value is larger than a predetermined failure determination threshold, and a re-determination unit configured to conduct re-determination of the failure on the motion axis, which is diagnosed as the failure by the failure diagnosis unit, based on a previous maintenance record and a previous inspection result.Type: GrantFiled: May 29, 2015Date of Patent: January 26, 2021Assignee: Nissan Motor Co., Ltd.Inventors: Masaki Kuno, Toshimichi Urakawa, Toru Takagi
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Publication number: 20200331145Abstract: A malfunction determination method for a production machine including a motor as a driving source of a rotating mechanism acquires sensor data of a sensor for detecting a condition of the production machine, determines whether the production machine has an operation stop period during which the production machine has stopped its operation for a predetermined period of time or longer in accordance with an operation history of the production machine, sets a malfunction determination suspension period for suspending a malfunction determination of the production machine when determined to have the operation stop period, in accordance with a length of the operation stop period, and determines whether the production machine has a malfunction in a period other than the malfunction determination suspension period.Type: ApplicationFiled: December 26, 2017Publication date: October 22, 2020Applicant: Nissan Motor Co., Ltd.Inventors: Yasuhiro Tanaka, Toshimichi Urakawa, Toru Takagi, Minoru Tomikashi
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Patent number: 10766151Abstract: A failure diagnosis device applicable to a mechanical device provided with a motor as a source to drive a motion axis, and configured to acquire a moving position of the motion axis and a disturbance torque value applied to the motion axis every predetermined period, and to diagnose that a failure is occurring when the disturbance torque value is larger than a failure determination threshold, includes a disturbance torque selector configured to calculate a change from a reference value of each of the acquired disturbance torque values, and to accumulate the disturbance torque values except each disturbance torque value having the change from the reference value equal to or larger than a predetermined threshold, and a failure diagnosis unit configured to diagnose a failure of the mechanical device by using the disturbance torque values accumulated by the disturbance torque selector.Type: GrantFiled: May 22, 2015Date of Patent: September 8, 2020Assignee: Nissan Motor Co., Ltd.Inventors: Masaki Kuno, Toshimichi Urakawa
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Publication number: 20180154530Abstract: A failure diagnosis device applicable to a mechanical device provided with a motor as a source to drive a motion axis, and configured to acquire a moving position of the motion axis and a disturbance torque value applied to the motion axis every predetermined period, and to diagnose that a failure is occurring when the disturbance torque value is larger than a failure determination threshold, includes a disturbance torque selector configured to calculate a change from a reference value of each of the acquired disturbance torque values, and to accumulate the disturbance torque values except each disturbance torque value having the change from the reference value equal to or larger than a predetermined threshold, and a failure diagnosis unit configured to diagnose a failure of the mechanical device by using the disturbance torque values accumulated by the disturbance torque selector.Type: ApplicationFiled: May 22, 2015Publication date: June 7, 2018Applicant: NISSAN MOTOR CO., LTD.Inventors: Masaki Kuno, Toshimichi Urakawa
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Publication number: 20180147735Abstract: A failure diagnosis device applicable to a mechanical device provided with. motors independent of One another as sources to drive motion axes, respectively, and configured to acquire a moving position of each motion axis and a disturbance torque value applied to the motion axis every predetermined period, and to diagnose a failure of the mechanical device, includes a failure diagnosis unit configured to diagnose the motion axis as a failure when the disturbance torque value is larger than a predetermined failure determination threshold, and a re-determination unit configured to conduct re-determination of the failure on the motion axis, which is diagnosed as the failure by the failure diagnosis unit, based on a previous maintenance record and a previous inspection result.Type: ApplicationFiled: May 29, 2015Publication date: May 31, 2018Applicant: NISSAN MOTOR CO., LTD.Inventors: Masaki Kuno, Toshimichi Urakawa, Toru Takagi