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GB2361764A - Linear optical transducer - Google Patents

Linear optical transducer Download PDF

Info

Publication number
GB2361764A
GB2361764A GB0010015A GB0010015A GB2361764A GB 2361764 A GB2361764 A GB 2361764A GB 0010015 A GB0010015 A GB 0010015A GB 0010015 A GB0010015 A GB 0010015A GB 2361764 A GB2361764 A GB 2361764A
Authority
GB
United Kingdom
Prior art keywords
transducer
spindle
linear optical
stainless steel
register
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB0010015A
Other versions
GB0010015D0 (en
Inventor
Nicholas John Dunmow
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
N D DESIGN
Original Assignee
N D DESIGN
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by N D DESIGN filed Critical N D DESIGN
Priority to GB0010015A priority Critical patent/GB2361764A/en
Publication of GB0010015D0 publication Critical patent/GB0010015D0/en
Publication of GB2361764A publication Critical patent/GB2361764A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
    • G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

A linear optical transducer comprises a graduated filter (1) mounted on top of a spindle (5). When the spindle is subjected to any pressure, the graduated filter will pass between a light source (3) and a photoresistive cell (2). As the light intensity changes, the photoresistive cell will register a change of resistance. This will register as an increase or decrease in ohms on an analogue or digital meter. A spring (4) is fitted inside a stainless steel tube around the spindle (5) and supplies a positive pressure to the movement of the transducer. The spindle may be placed in contact with a surface to monitor displacement of the surface. The transducer may be made of stainless steel and plastic to withstand exposure to the elements, and have a high temperature cable fitted.

Description

1, 2361764 Optical linear transducer
Description of Optical Transducer
The Optical Transducer has been designed from stainless steel and plastic, as most of the intended applications will be exposed to the elements. High temperature cable can be fitted to allow use in a wider range of conditions.
Intended Applications The intended applications will vary depending upon the user. Some uses are: Measuring stress movements in bridges Road surface movement in diverse weather Movement in structures during and after construction How it operates Using part 7 drawing as a guide the outer case is attached to a fixing point relevant to the user, with the spindle gently pressing against the surface to be monitored. When the surface moves, the spindle is forced into the outer-case moving the graduated filter between the photo- resistive cell and the light source. The intensity of the light changes and the photo-resistive cell monitor's a change.
This change can be seen as a plus or minus reading in ohms on a digital meter.
To calculate the distance travelled a maximum compression reading is made and then divided by the maximum distance travelled. This will give an accurate and reliable linear scale. One of the benefits of this method of measurement is the transducer can be monitore ' d from a great distance and the transducer can be turned off without fear of resetting itself when switched back on.
The transducer has a graduated filter mounted on top of a spindle. When the spindle is subjected to any pressure the graduated filter will pass between a light source and a photo resistive cell. As the light intensity changes the photo resistive cell will register a change. This change can be seen as an increase or decrease in olun's on an analogue or digital meter.
A spring is fitted inside the stainless steel tube around the stainless steel spindle, which supplies a positive pressure to the movement of the transducer.
7

Claims (1)

  1. Claims Linear Optical Transducer
    1. A transducer that operates in a linear axis that measures distance of movement, when spindle depressed.
    A transducer as claimed in claim 1 where the distance is determined by the graduated filter moving between a light source and a photo resistive cell.
    ai m 3. A transducer as cl 'rned in claims 1 and 2 where the resistance ' olims can be converted into distance 4. A transducer as clainied in any preceding claims which is made of metal and plastics that withstand extreme temperatures
GB0010015A 2000-04-26 2000-04-26 Linear optical transducer Withdrawn GB2361764A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0010015A GB2361764A (en) 2000-04-26 2000-04-26 Linear optical transducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0010015A GB2361764A (en) 2000-04-26 2000-04-26 Linear optical transducer

Publications (2)

Publication Number Publication Date
GB0010015D0 GB0010015D0 (en) 2000-06-14
GB2361764A true GB2361764A (en) 2001-10-31

Family

ID=9890448

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0010015A Withdrawn GB2361764A (en) 2000-04-26 2000-04-26 Linear optical transducer

Country Status (1)

Country Link
GB (1) GB2361764A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104827008A (en) * 2015-05-19 2015-08-12 大连华锐重工集团股份有限公司 Temperature displacement coupling device for real-time monitoring of crystallizer copper plate in on-line mode

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4572607A (en) * 1982-02-03 1986-02-25 Idr Enterprises, Inc. Displacement transducer using a movable light shield moved within a predetermined range for linear detector output
GB2173898A (en) * 1983-04-26 1986-10-22 Central Electr Generat Board Apparatus for optically measuring a displacement
US5017771A (en) * 1989-11-20 1991-05-21 The Boeing Company Position sensor using optical fibers and a variable filter
GB2245973A (en) * 1990-06-06 1992-01-15 Stefanos George Koudis Level monitoring using fibre-optic links
US5329114A (en) * 1992-12-31 1994-07-12 United Technologies Corporation Actuator with an optical position sensor using linear attenuators
US5376785A (en) * 1992-10-02 1994-12-27 Chin; Philip K. Optical displacement sensor utilizing optical diffusion
US5386291A (en) * 1992-11-25 1995-01-31 Mitutoyo Corporation Displacement sensor including a heat insulating member partitioning the moving scale and the semiconductor laser
US5420413A (en) * 1992-12-31 1995-05-30 United Technologies Corporation Actuator with an optical position sensor using a variable magnetic field

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4572607A (en) * 1982-02-03 1986-02-25 Idr Enterprises, Inc. Displacement transducer using a movable light shield moved within a predetermined range for linear detector output
GB2173898A (en) * 1983-04-26 1986-10-22 Central Electr Generat Board Apparatus for optically measuring a displacement
US5017771A (en) * 1989-11-20 1991-05-21 The Boeing Company Position sensor using optical fibers and a variable filter
GB2245973A (en) * 1990-06-06 1992-01-15 Stefanos George Koudis Level monitoring using fibre-optic links
US5376785A (en) * 1992-10-02 1994-12-27 Chin; Philip K. Optical displacement sensor utilizing optical diffusion
US5386291A (en) * 1992-11-25 1995-01-31 Mitutoyo Corporation Displacement sensor including a heat insulating member partitioning the moving scale and the semiconductor laser
US5329114A (en) * 1992-12-31 1994-07-12 United Technologies Corporation Actuator with an optical position sensor using linear attenuators
US5420413A (en) * 1992-12-31 1995-05-30 United Technologies Corporation Actuator with an optical position sensor using a variable magnetic field

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104827008A (en) * 2015-05-19 2015-08-12 大连华锐重工集团股份有限公司 Temperature displacement coupling device for real-time monitoring of crystallizer copper plate in on-line mode
CN104827008B (en) * 2015-05-19 2017-01-11 大连华锐重工集团股份有限公司 Temperature displacement coupling device for real-time monitoring of crystallizer copper plate in on-line mode

Also Published As

Publication number Publication date
GB0010015D0 (en) 2000-06-14

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)