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Signal transmission system for a measurement device

一种传输系统、测量装置的技术，应用在信号传输系统领域，能够解决影响传输、误差等问题

Inactive Publication Date: 2009-07-15
RENISHAW PLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This creates an error between the position of the contact and the position represented by the fixed output, and this error is an unknown variable that cannot be eliminated by calibration
Therefore, in order to maintain the overall accuracy of the probe system, there is the following problem: it must be ensured that any transmission delay caused by the signal transmission system is reproducible, that is, the delay caused by each probe trigger is the same of
There is thus the problem of interception of probe transmissions by receivers of other systems using the same frequency channel
In addition, the presence of radio communication can also affect the transmission

Method used

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  • Signal transmission system for a measurement device
  • Signal transmission system for a measurement device
  • Signal transmission system for a measurement device

Examples

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Embodiment Construction

[0038] figure 1 A touch trigger probe 10 is shown mounted on a spindle 12 of a machine tool. The touch trigger probe 10 has a steerable stylus 14 with a tip 16 that can be brought into contact with a workpiece. The signal transmission system consists of two stations. The probe station 18 is connected to the touch trigger probe and is located on the movable part of the machine tool. The machine station 20 is located in a fixed part 22 of the machine tool structure and is connected to a machine tool controller 24 .

[0039] Data is transmitted between the probe site 18 and the machine site 20 using a spread spectrum radio communication link, in this example a frequency hopping radio communication link, which sends discrete packets of serial binary data.

[0040] The probe site and the machine site hop between different frequencies approximately in sync with each other, and send occasional messages between them to synchronize the two sites. The probe site initiates each exchan...

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Abstract

A transmission system for a measurement device on a coordinate positioning apparatus comprises a first station point mounted on one of the measuring device and the coordinate positioning apparatus; a second station point mounted on another one of the measuring device and the coordinate positioning apparatus; the first station point and the second station point uses a spread spectrum radio link to be communicated; if the signal transmitted by the first station point is not received by the second station point, the first station point re-transmits the signal. The invention also refers to a transmission system for a measurement device on a coordinate positioning apparatus, comprising a first station point mounted on one of the measuring device and the coordinate positioning apparatus; a second station point mounted on another one of the measuring device and the coordinate positioning apparatus; the first station point and the second station point uses a spread spectrum radio link to be communicated; the signal transmitted by the first station point is not received by the second station point, the first station point jumps frequency in different frequencies.

Description

[0001] This application is a divisional application with an application date of December 18, 2003, an application number of 200380107454.9, and an invention title of "Signal Transmission System for Measuring Devices". technical field [0002] The present invention relates to measuring devices for use on coordinate measuring machines, such as coordinate measuring machine (CMM) machine tools, manual coordinate measuring arms, and inspection robots. More particularly, it relates to signal transmission systems used on such measuring devices. Background technique [0003] US Patent No. 4,153,998 describes a trigger probe for determining the position of a workpiece. In use, the probe is moved relative to the workpiece through the machine. The probe has a steerable stylus and transmits a trigger signal when the stylus comes into contact with the workpiece. The trigger signal is indicated by the probe changing from one state to another. The trigger signal is used by the machine's...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B21/00G01B21/04H04B1/713
CPCH04B1/713G01B2210/58G01B21/047G08C17/02
Inventor 马丁·伍利特约翰·斯泰尔斯约翰·利普特罗特
Owner RENISHAW PLC