Invention Grant
- Patent Title: Device and method for coordinate measurement
- Patent Title (中): 用于坐标测量的装置和方法
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Application No.: US11597445Application Date: 2005-04-15
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Publication No.: US07367133B2Publication Date: 2008-05-06
- Inventor: Rainer Hagl , Herbert Reiter , Erich Strasser
- Applicant: Rainer Hagl , Herbert Reiter , Erich Strasser
- Applicant Address: DE Traunreut
- Assignee: Dr. Johannes Heidenhain GmbH
- Current Assignee: Dr. Johannes Heidenhain GmbH
- Current Assignee Address: DE Traunreut
- Agency: Kenyon & Kenyon LLP
- Priority: DE102004026022 20040527; DE102005011285 20050311
- International Application: PCT/EP2005/003966 WO 20050415
- International Announcement: WO2005/119173 WO 20051215
- Main IPC: G01B7/008
- IPC: G01B7/008

Abstract:
In a device and a method for coordinate measurement, a probe head generates a switching signal in response to contact with a workpiece. The device includes position-measuring units for each coordinate axis to be measured, with the aid of which the relative position of the probe head is measurable; and a processing unit, which operates in a discrete-time manner in time intervals of a controller clock signal. For coordinate measurement, position-measuring values are measured in time intervals of a probing clock signal, which is generated by a probing clock generator and has a higher frequency than a controller clock signal of a processing unit. The position-measuring values are stored in a position-data memory. A time span between a pulse of the controller clock signal and the occurrence of the switching signal at the switching probe head is measured in a time-measuring unit. With the aid of the measured time span, the position value in the position-data memory closest to the time of the switching signal is ascertained in the processing unit or in the position-measuring units.
Public/Granted literature
- US20070245584A1 Device and Method for Coordinate Measurement Public/Granted day:2007-10-25
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