Patents by Inventor Tsung-Ling HWANG
Tsung-Ling HWANG 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: 9956661Abstract: A feedback control numerical machine tool and a method thereof are provided. The machine tool includes at least two spindles, an acoustic frequency detecting module, at least two spindle position detecting modules, and a control module. The spindles machine a workpiece. The acoustic frequency detecting module detects an acoustic frequency of the spindles when machining the workpiece. The spindle position detecting modules detects position information of the spindles when machining the workpiece. The control module acquires the acoustic frequency and the position information of the spindles, monitors whether any of the spindles chatters according to the acoustic frequency of the spindles, and performs chattering avoidance to the spindle that chatters according to the position information of the spindles. As such, the present disclosure performs chattering monitoring to a plurality of spindles and avoids the chattering immediately.Type: GrantFiled: December 24, 2014Date of Patent: May 1, 2018Assignee: Industrial Technology Research InstituteInventors: Tsung-Ling Hwang, Tzuo-Liang Luo, Chin-Te Lin, Shuo-Peng Liang, Ta-Jen Peng
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Patent number: 9833868Abstract: A chatter avoidance method and device is provided, including steps of: providing a stable operating condition plot; partially removing a first layer of a workpiece with a predetermined first removal depth according to a safe removal depth of the stable operating condition plot and sensing a chatter caused by the removal operation; if no chatter is sensed, completing the removal operation, otherwise, continuing to partially remove the first layer with a second removal depth less than the predetermined first removal depth; and determining a minimum removal depth according to the removal operation, and removing a last layer of the workpiece with a last removal depth less than or equal to the minimum removal depth, allowing the workpiece to have a target thickness. The disclosure prevents a chatter from continuously occurring without requiring a shut-down and thereby maintains a desired production rate.Type: GrantFiled: December 16, 2015Date of Patent: December 5, 2017Assignee: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Tsung-Ling Hwang, Chin-Te Lin, Shuo-Peng Liang, Ta-Jen Peng, Jen-Ji Wang, Tzuo-Liang Luo
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Publication number: 20170100810Abstract: A chatter avoidance method and device is provided, including steps of: providing a stable operating condition plot; partially removing a first layer of a workpiece with a predetermined first removal depth according to a safe removal depth of the stable operating condition plot and sensing a chatter caused by the removal operation; if no chatter is sensed, completing the removal operation, otherwise, continuing to partially remove the first layer with a second removal depth less than the predetermined first removal depth; and determining a minimum removal depth according to the removal operation, and removing a last layer of the workpiece with a last removal depth less than or equal to the minimum removal depth, allowing the workpiece to have a target thickness. The disclosure prevents a chatter from continuously occurring without requiring a shut-down and thereby maintains a desired production rate.Type: ApplicationFiled: December 16, 2015Publication date: April 13, 2017Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Tsung-Ling HWANG, Chin-Te LIN, Shuo-Peng LIANG, Ta-Jen PENG, Jen-Ji WANG, Tzuo-Liang LUO
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Publication number: 20160144474Abstract: A feedback control numerical machine tool and a method thereof are provided. The machine tool includes at least two spindles, an acoustic frequency detecting module, at least two spindle position detecting modules, and a control module. The spindles machine a workpiece. The acoustic frequency detecting module detects an acoustic frequency of the spindles when machining the workpiece. The spindle position detecting modules detects position information of the spindles when machining the workpiece. The control module acquires the acoustic frequency and the position information of the spindles, monitors whether any of the spindles chatters according to the acoustic frequency of the spindles, and performs chattering avoidance to the spindle that chatters according to the position information of the spindles. As such, the present disclosure performs chattering monitoring to a plurality of spindles and avoids the chattering immediately.Type: ApplicationFiled: December 24, 2014Publication date: May 26, 2016Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Tsung-Ling Hwang, Tzuo-Liang Luo, Chin-Te Lin, Shuo-Peng Liang, Ta-Jen Peng
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Patent number: 9305326Abstract: An exemplary embodiment describes a method for tile elimination, including: reading in data of a new tile; reading signature values corresponding to the new tile from a signature value repository; generating signature values for the new tile; comparing the read signature values and the generated signature values of the same tile to determine whether the two sets of signature values being identical; when the two sets of signature values being identical, copying the new tile directly from a tile frame buffer without rendering; otherwise, updating the signature value repository with the generated signature values replacing the stored signature values; rendering the tile; and updating the tile frame buffer with the newly rendered tile.Type: GrantFiled: December 26, 2013Date of Patent: April 5, 2016Assignee: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Tsung-Ling Hwang, Shau-Yin Tseng, Tai-Hua Lu
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Publication number: 20150187123Abstract: An exemplary embodiment describes a method for tile elimination, including: reading in data of a new tile; reading signature values corresponding to the new tile from a signature value repository; generating signature values for the new tile; comparing the read signature values and the generated signature values of the same tile to determine whether the two sets of signature values being identical; when the two sets of signature values being identical, copying the new tile directly from a tile frame buffer without rendering; otherwise, updating the signature value repository with the generated signature values replacing the stored signature values; rendering the tile; and updating the tile frame buffer with the newly rendered tile.Type: ApplicationFiled: December 26, 2013Publication date: July 2, 2015Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Tsung-Ling HWANG, Shau-Yin TSENG, Tai-Hua LU