US20090130987A1 - Probe signalling - Google Patents

Probe signalling Download PDF

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Publication number
US20090130987A1
US20090130987A1 US12/285,098 US28509808A US2009130987A1 US 20090130987 A1 US20090130987 A1 US 20090130987A1 US 28509808 A US28509808 A US 28509808A US 2009130987 A1 US2009130987 A1 US 2009130987A1
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United States
Prior art keywords
window
probe
circuit board
parts
signal
Prior art date
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Abandoned
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US12/285,098
Inventor
Christopher J. Daniel
Peter K. Hellier
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Renishaw PLC
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Renishaw PLC
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Application filed by Renishaw PLC filed Critical Renishaw PLC
Priority to US12/285,098 priority Critical patent/US20090130987A1/en
Publication of US20090130987A1 publication Critical patent/US20090130987A1/en
Abandoned legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B21/00Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
    • G01B21/02Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
    • G01B21/04Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness by measuring coordinates of points
    • G01B21/047Accessories, e.g. for positioning, for tool-setting, for measuring probes
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B5/00Measuring arrangements characterised by the use of mechanical techniques
    • G01B5/004Measuring arrangements characterised by the use of mechanical techniques for measuring coordinates of points
    • G01B5/008Measuring arrangements characterised by the use of mechanical techniques for measuring coordinates of points using coordinate measuring machines
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/48Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
    • G01S7/481Constructional features, e.g. arrangements of optical elements
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B2210/00Aspects not specifically covered by any group under G01B, e.g. of wheel alignment, caliper-like sensors
    • G01B2210/58Wireless transmission of information between a sensor or probe and a control or evaluation unit
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00Program-control systems
    • G05B2219/30Nc systems
    • G05B2219/33Director till display
    • G05B2219/33192Radio link, wireless
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00Program-control systems
    • G05B2219/30Nc systems
    • G05B2219/33Director till display
    • G05B2219/33198Laser, light link, infrared
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00Program-control systems
    • G05B2219/30Nc systems
    • G05B2219/50Machine tool, machine tool null till machine tool work handling
    • G05B2219/50137Contact in probe, touch probe to detect contact, touch trigger

Definitions

  • the present invention relates to an improved structure for a probe which utilises transmission of signals, e.g. representing stylus triggering information for measuring physical dimensions.
  • Probes for dimensional measurement have been used without wires for transmitting signals representing coordinates to a fixed base station (e.g. on a machine tool).
  • Signals are known to be transmitted using infrared light, radio waves or inductively, and a number of transmitters and receivers for the signals are generally mounted on an external surface of the probe.
  • One such probe is shown in European Patent No. 337669.
  • This window can be in the form of an annular ring covering a recessed row of transmitters/receivers.
  • the transmitters/receivers need to be mounted to an external surface of the probe inside the window.
  • the present invention provides a measurement probe comprising a housing having a signal transmitter and/or receiver and a circuit board therein and comprising a window transparent to the signal, characterised in that the said transmitter and/or receiver is mounted to the circuit board, adjacent the window.
  • the window is in the form of an annulus.
  • the said transmitter and/or receiver is a plurality of infrared transmitter and receiver components which may be spaced within and around the annulus.
  • the circuit board may be placed within the annular window and may be bent at lines of weakness.
  • the window may be fully or partially transparent to the light and may include a filter and/or visually attractive coating.
  • FIG. 1 shows a general view of a probe of the type used for this invention
  • FIG. 2 shows a section of a first embodiment of a probe according to the invention
  • FIG. 3 shows a perspective view, partially sectioned of the probe shown in FIG. 2 ;
  • FIGS. 4 and 5 show a second embodiment of a probe according to the invention.
  • a probe 1 is shown mounted to a machine.
  • the probe is movable to determine the dimensions of some article 11 .
  • Stylus 9 is used to touch the article 11 and determine physical dimensions.
  • Wireless communication is conducted between probe 1 and base station 10 , the signals therebetween representing a trigger signal upon contact with the article 11 , for example.
  • a plurality of transmitters and/or receivers may be used on the probe to enable uninterrupted communication with the base station. Multiple base stations might be employed, allowing the use of just a single or a few transmitters/receivers in the probe.
  • probe 1 is shown in cross-section.
  • Spigot 2 would in use be mounted to a machine tool shank or the like and measurement stylus 9 would be fitted to stylus holder 3 .
  • Upper and lower housing parts 4 and 5 form the body of the probe, together with a signal-transparent annular portion 6 .
  • a longitudinal axis 20 extends through the housing parts 4 and 5 .
  • Three bolts 7 hold the housing parts 4 and 5 together, and clamp therebetween signal-transparent portion 6 .
  • the annular portion is a borosilicate glass providing a structural element of the probe body and forming a window for infrared light to pass to and from transmitters/receivers 12 / 13 surface mounted to circuit boards 8 within the probe.
  • infrared receivers and transmitters and LEDs are surface mounted to the board 8 and infrared light signals can pass through the window 6 from/to base station 10 directly from or to the boards 8 .
  • the window is shown sealed at its inner surface, but could of course be sealed at its annular end faces. The window provides a means of filtering unwanted light frequencies.
  • FIG. 3 shows a further view of the probe of the present invention, with like numbered parts.
  • FIGS. 4 and 5 show a modified probe. This embodiment is similar to the embodiment shown in FIGS. 2 and 3 . Parts common to the embodiment shown in FIGS. 2 and 3 and the embodiment shown in FIGS. 4 and 5 have like reference numerals.
  • upper and lower housing parts 4 and 5 are joined by a central pillar 14 which does not compress annular glass or plastics window 6 other than to provide a seal (at seals 18 ) around the edges of the window. Therefore, in this embodiment, the window does not form a rigid part of the structure of the probe.
  • Infrared transmitters and receivers 12 / 13 are spaced around the window 6 and are mounted to the surface of a circuit board 8 ′ inside the probe e.g. either affixed (e.g. by soldering) directly to the surface of the board or affixed snugly to the board and held in place by through pins (possibly soldered).
  • Circuit board 8 ′ is a relatively rigid substrate bent into a polygon. Bending of the circuit board is made possible by reducing the thickness of the board at intervals to produce lines of weakness ( 15 FIG. 5 ). The board can then be bent, at the lines of weakness, into the desired shape.
  • FIG. 5 shows a view with upper body 4 removed.
  • Circuit board 8 ′ is shown formed around pillar 14 and overlaps itself in order that a larger area of board can be used.
  • Part 16 of the board 8 ′ is used as a contact area for sprung-loaded pins in the upper body 4 .
  • the pins (not shown) supply power to the board from a battery compartment 17 in the upper body 4 .
  • the probe shown in FIGS. 4 and 5 like the probe shown in FIGS. 2 and 3 has surface mounted electrical components, in particular infrared transmitters and receivers, within the body of the probe and adjacent a window transparent to infrared light.
  • This construction reduces the complexity of the probe, reduces costs, affords a more reliable seal against the ingress of foreign materials e.g. machining coolant, and reduces the risk of accidental damage of the surface mounted components.
  • No flying leads are required for transmitters/receivers which hitherto were mounted off the circuit boards 8 , 8 ′.
  • the glass portion 6 forms part of the structure of the probe so a simpler construction is realised.

Abstract

A measurement probe 1 for a machine tool has a housing 4/5 incorporating a window 6 which allows the optical transmission or receipt of signals from/to infrared transmitters 12 or receivers 13. To obviate the need to mount the transmitter and receiver components on an external surface of the housing, they are surface mounted to a circuit board 8′.

Description

  • This application is a continuation of U.S. patent application Ser. No. 10/856,832, filed Jun. 1, 2004, which is a continuation of U.S. patent application Ser. No. 09/959,206, filed Oct. 22, 2001, which is a National Phase of PCT/GB01/00878, filed Mar. 1, 2001, the entire contents of which are hereby incorporated by reference.
  • The present invention relates to an improved structure for a probe which utilises transmission of signals, e.g. representing stylus triggering information for measuring physical dimensions.
  • Probes for dimensional measurement have been used without wires for transmitting signals representing coordinates to a fixed base station (e.g. on a machine tool).
  • Signals are known to be transmitted using infrared light, radio waves or inductively, and a number of transmitters and receivers for the signals are generally mounted on an external surface of the probe. One such probe is shown in European Patent No. 337669.
  • In hostile conditions these transmitters/receivers can become damaged. Additionally each needs to be sealed against ingress of foreign materials into the probe.
  • One such commercially available probe uses a window to cover and protect infrared transmitters/receivers. This window can be in the form of an annular ring covering a recessed row of transmitters/receivers. The transmitters/receivers need to be mounted to an external surface of the probe inside the window.
  • The present invention provides a measurement probe comprising a housing having a signal transmitter and/or receiver and a circuit board therein and comprising a window transparent to the signal, characterised in that the said transmitter and/or receiver is mounted to the circuit board, adjacent the window.
  • Preferably the window is in the form of an annulus.
  • Preferably the said transmitter and/or receiver is a plurality of infrared transmitter and receiver components which may be spaced within and around the annulus. The circuit board may be placed within the annular window and may be bent at lines of weakness. The window may be fully or partially transparent to the light and may include a filter and/or visually attractive coating.
  • Embodiments of the invention are described herein by way of non-limiting example, with reference to the accompanying drawings where:
  • FIG. 1 shows a general view of a probe of the type used for this invention;
  • FIG. 2 shows a section of a first embodiment of a probe according to the invention;
  • FIG. 3 shows a perspective view, partially sectioned of the probe shown in FIG. 2; and
  • FIGS. 4 and 5 show a second embodiment of a probe according to the invention.
  • Referring to FIG. 1 a probe 1 is shown mounted to a machine. The probe is movable to determine the dimensions of some article 11. Stylus 9 is used to touch the article 11 and determine physical dimensions. Wireless communication is conducted between probe 1 and base station 10, the signals therebetween representing a trigger signal upon contact with the article 11, for example. A plurality of transmitters and/or receivers may be used on the probe to enable uninterrupted communication with the base station. Multiple base stations might be employed, allowing the use of just a single or a few transmitters/receivers in the probe.
  • Referring to FIG. 2 probe 1 is shown in cross-section. Spigot 2 would in use be mounted to a machine tool shank or the like and measurement stylus 9 would be fitted to stylus holder 3. Upper and lower housing parts 4 and 5 form the body of the probe, together with a signal-transparent annular portion 6. As will be appreciated, a longitudinal axis 20 extends through the housing parts 4 and 5. Three bolts 7 hold the housing parts 4 and 5 together, and clamp therebetween signal-transparent portion 6.
  • In this embodiment the annular portion is a borosilicate glass providing a structural element of the probe body and forming a window for infrared light to pass to and from transmitters/receivers 12/13 surface mounted to circuit boards 8 within the probe. In this instance infrared receivers and transmitters and LEDs are surface mounted to the board 8 and infrared light signals can pass through the window 6 from/to base station 10 directly from or to the boards 8. The window is shown sealed at its inner surface, but could of course be sealed at its annular end faces. The window provides a means of filtering unwanted light frequencies.
  • FIG. 3 shows a further view of the probe of the present invention, with like numbered parts.
  • FIGS. 4 and 5 show a modified probe. This embodiment is similar to the embodiment shown in FIGS. 2 and 3. Parts common to the embodiment shown in FIGS. 2 and 3 and the embodiment shown in FIGS. 4 and 5 have like reference numerals.
  • In this embodiment, upper and lower housing parts 4 and 5 (with longitudinal axis 20) are joined by a central pillar 14 which does not compress annular glass or plastics window 6 other than to provide a seal (at seals 18) around the edges of the window. Therefore, in this embodiment, the window does not form a rigid part of the structure of the probe. Infrared transmitters and receivers 12/13 are spaced around the window 6 and are mounted to the surface of a circuit board 8′ inside the probe e.g. either affixed (e.g. by soldering) directly to the surface of the board or affixed snugly to the board and held in place by through pins (possibly soldered). Circuit board 8′ is a relatively rigid substrate bent into a polygon. Bending of the circuit board is made possible by reducing the thickness of the board at intervals to produce lines of weakness (15 FIG. 5). The board can then be bent, at the lines of weakness, into the desired shape.
  • FIG. 5 shows a view with upper body 4 removed. Circuit board 8′ is shown formed around pillar 14 and overlaps itself in order that a larger area of board can be used. Part 16 of the board 8′ is used as a contact area for sprung-loaded pins in the upper body 4. The pins (not shown) supply power to the board from a battery compartment 17 in the upper body 4.
  • The probe shown in FIGS. 4 and 5 like the probe shown in FIGS. 2 and 3 has surface mounted electrical components, in particular infrared transmitters and receivers, within the body of the probe and adjacent a window transparent to infrared light. This construction reduces the complexity of the probe, reduces costs, affords a more reliable seal against the ingress of foreign materials e.g. machining coolant, and reduces the risk of accidental damage of the surface mounted components. No flying leads are required for transmitters/receivers which hitherto were mounted off the circuit boards 8,8′. In the first embodiment, the glass portion 6 forms part of the structure of the probe so a simpler construction is realised.

Claims (20)

1. An apparatus for measurement and for wireless signal communication with a base station, the apparatus comprising:
a housing that include two parts;
a member that connects the two parts;
a signal transparent window that is located between the two parts and extends around the member; and
a circuit board lying at least partially between the member and the window for signal communication with the base station.
2. An apparatus as claimed in claim 1, further comprising at least one of a signal transmitter or a signal receiver for the signal communication with the base station mounted on the circuit board.
3. An apparatus as claimed in claim 2, wherein at least one of a plurality of signal transmitters or a plurality of signal receivers are mounted on the circuit board, wherein the at least one of a plurality of signal transmitters or a plurality of signal receivers are positioned on the circuit board near the window.
4. An apparatus as claimed in claim 2, wherein the at least one of a signal transmitter or a signal receiver is an optical device operable in the infrared spectrum.
5. An apparatus as claimed in claim 1, wherein the window is substantially annular.
6. An apparatus as claimed in claim 1, wherein the window is a filter.
7. An apparatus as claimed in claim 1, wherein the window is compressed between the two housing parts.
8. An apparatus as claimed in claim 1, wherein the window forms a structural element of the probe housing
9. An apparatus as claimed in claim 1, wherein the member connecting the two parts is a pillar joining the two parts.
10. An apparatus as claimed in claim 1, wherein the circuit board is bent around the member and is near the window.
11. An apparatus as claimed in claim 1, wherein a seal is provided between the window and the two housing parts.
12. An apparatus for measurement and for optical wireless signal communication with a base station, the apparatus comprising:
a housing that includes two parts;
a member that connects the two parts;
a substantially annular signal-transparent window that is located between the two parts and extends around the member;
a circuit board; and
at least one of a plurality of transmitters or a plurality of receivers mounted on the circuit board, wherein:
at least a part of the circuit board is positioned between the member and the window,
the part of the circuit board that is positioned between the member and the window has the at least one of a plurality of transmitters or a plurality of receivers mounted thereon, and
the at least one of a plurality of transmitters or a plurality of receivers are positioned near the window for the optical signal communication with the base station.
13. An apparatus according to claim 12, wherein the member comprises three bolts, with the bolts passing through the circuit board.
14. An apparatus according to claim 12 wherein a plurality of transmitters and a plurality of receivers are mounted on the circuit board.
15. A probe for dimensional measurement and for wireless signal communication with a base station, the probe comprising:
a housing that includes two parts;
a window transparent to the signal separating the first and second parts; and
a circuit board adjacent the window for said signal communication with the base station,
wherein the window forms a structural element of the probe housing.
16. A probe for dimensional measurement as claimed in claim 15, wherein the window is compressed between the two housing parts.
17. A probe for dimensional measurement as claimed in 15, wherein the two housing parts are bolted together.
18. A probe for dimensional measurement as claimed in claim 15, wherein the window is annular.
19. A probe for dimensional measurement as claimed in claim 15, wherein the window comprises glass.
20. A probe for dimensional measurement as claimed in claim 15, wherein the window comprises plastic.
US12/285,098 2000-03-04 2008-09-29 Probe signalling Abandoned US20090130987A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US12/285,098 US20090130987A1 (en) 2000-03-04 2008-09-29 Probe signalling

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
GBGB0005166.4A GB0005166D0 (en) 2000-03-04 2000-03-04 Probe signal transmission system
GB0005166.4 2000-03-04
PCT/GB2001/000878 WO2001067033A1 (en) 2000-03-04 2001-03-01 Probe signalling
US09/959,206 US6776344B2 (en) 2000-03-04 2001-03-01 Probe signalling
US10/856,832 US7441707B2 (en) 2000-03-04 2004-06-01 Probe signalling
US12/285,098 US20090130987A1 (en) 2000-03-04 2008-09-29 Probe signalling

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US10/856,832 Continuation US7441707B2 (en) 2000-03-04 2004-06-01 Probe signalling

Publications (1)

Publication Number Publication Date
US20090130987A1 true US20090130987A1 (en) 2009-05-21

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ID=9886912

Family Applications (3)

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US09/959,206 Expired - Lifetime US6776344B2 (en) 2000-03-04 2001-03-01 Probe signalling
US10/856,832 Expired - Lifetime US7441707B2 (en) 2000-03-04 2004-06-01 Probe signalling
US12/285,098 Abandoned US20090130987A1 (en) 2000-03-04 2008-09-29 Probe signalling

Family Applications Before (2)

Application Number Title Priority Date Filing Date
US09/959,206 Expired - Lifetime US6776344B2 (en) 2000-03-04 2001-03-01 Probe signalling
US10/856,832 Expired - Lifetime US7441707B2 (en) 2000-03-04 2004-06-01 Probe signalling

Country Status (7)

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US (3) US6776344B2 (en)
EP (3) EP1477767B1 (en)
JP (2) JP3967592B2 (en)
AT (1) ATE274686T1 (en)
DE (1) DE60105102T2 (en)
GB (1) GB0005166D0 (en)
WO (1) WO2001067033A1 (en)

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JP2006313567A (en) 2006-11-16
ATE274686T1 (en) 2004-09-15
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DE60105102D1 (en) 2004-09-30
EP1477767B1 (en) 2016-05-11
JP3967592B2 (en) 2007-08-29
GB0005166D0 (en) 2000-04-26
US20020158136A1 (en) 2002-10-31
EP1477767A2 (en) 2004-11-17
EP1477767A3 (en) 2005-01-19
EP1477768A3 (en) 2005-04-13
EP1477768B1 (en) 2016-08-24
EP1185838B1 (en) 2004-08-25
WO2001067033A1 (en) 2001-09-13
JP2003526170A (en) 2003-09-02
US20040219886A1 (en) 2004-11-04
DE60105102T2 (en) 2005-01-20
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US6776344B2 (en) 2004-08-17
EP1477768A2 (en) 2004-11-17

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