CA2024527A1 - Acoustic digitizing system - Google Patents

Acoustic digitizing system

Info

Publication number
CA2024527A1
CA2024527A1 CA2024527A CA2024527A CA2024527A1 CA 2024527 A1 CA2024527 A1 CA 2024527A1 CA 2024527 A CA2024527 A CA 2024527A CA 2024527 A CA2024527 A CA 2024527A CA 2024527 A1 CA2024527 A1 CA 2024527A1
Authority
CA
Canada
Prior art keywords
acoustic
indicator
receivers
oscillations
transmission device
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.)
Granted
Application number
CA2024527A
Other languages
French (fr)
Other versions
CA2024527C (en
Inventor
Ian R. Gilchrist
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.)
Cyber Scientific Inc
Original Assignee
Ian R. Gilchrist
Cyber Scientific Inc.
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 Ian R. Gilchrist, Cyber Scientific Inc. filed Critical Ian R. Gilchrist
Priority to CA002124181A priority Critical patent/CA2124181A1/en
Priority to CA002124180A priority patent/CA2124180A1/en
Publication of CA2024527A1 publication Critical patent/CA2024527A1/en
Application granted granted Critical
Publication of CA2024527C publication Critical patent/CA2024527C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/043—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using propagating acoustic waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO 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
    • G01S11/00—Systems for determining distance or velocity not using reflection or reradiation
    • G01S11/14—Systems for determining distance or velocity not using reflection or reradiation using ultrasonic, sonic, or infrasonic waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO 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
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/18—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using ultrasonic, sonic, or infrasonic waves
    • G01S5/30—Determining absolute distances from a plurality of spaced points of known location
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
    • G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
    • G06F3/03545—Pens or stylus
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S367/00—Communications, electrical: acoustic wave systems and devices
    • Y10S367/907—Coordinate determination

Abstract

An acoustic position sensing apparatus is described which determines the position of an indicator in relation to a datum surface or volume. The apparatus comprises an acoustic point source transmission device mounted on the indicator for transmitting a sequence of periodic acoustic oscillations, and a plurality of acoustic point receivers positioned about the datum surface for receiving the acoustic oscillations. Comparators are connected to each acoustic receiver for converting the received acoustic oscillations to square waves having logical up and down levels. A register or other time determining circuit is coupled to each comparator and receives at least a leading portion of a square wave and provides an output if it determines that the portion exhibits one of the aforesaid logical levels for a predetermined time duration. A processor is responsive to the outputs from the registers to find the position of the indicator.

The acoustic point source transmission device is configured both as a linear stylus and as a planar "puck", both having at least a pair of acoustic transmitters. The apparatus employs, for two dimensional position detection, at least three acoustic receivers arranged in a non-linear fashion. A three dimensional position detector system is described which employs four receivers, three of which are oriented in one plane and a fourth in another plane.
CA002024527A 1989-09-26 1990-09-04 Acoustic digitizing system Expired - Fee Related CA2024527C (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CA002124181A CA2124181A1 (en) 1989-09-26 1990-09-04 Acoustic digitizing system
CA002124180A CA2124180A1 (en) 1989-09-26 1990-09-04 Acoustic digitizing system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/412,885 US4991148A (en) 1989-09-26 1989-09-26 Acoustic digitizing system
US07/412,885 1989-09-26

Related Child Applications (2)

Application Number Title Priority Date Filing Date
CA002124181A Division CA2124181A1 (en) 1989-09-26 1990-09-04 Acoustic digitizing system
CA002124180A Division CA2124180A1 (en) 1989-09-26 1990-09-04 Acoustic digitizing system

Publications (2)

Publication Number Publication Date
CA2024527A1 true CA2024527A1 (en) 1991-03-27
CA2024527C CA2024527C (en) 1995-02-14

Family

ID=23634880

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002024527A Expired - Fee Related CA2024527C (en) 1989-09-26 1990-09-04 Acoustic digitizing system

Country Status (5)

Country Link
US (1) US4991148A (en)
EP (1) EP0420500B1 (en)
JP (1) JPH03146891A (en)
CA (1) CA2024527C (en)
DE (1) DE69030908D1 (en)

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Also Published As

Publication number Publication date
DE69030908D1 (en) 1997-07-17
CA2024527C (en) 1995-02-14
US4991148A (en) 1991-02-05
EP0420500B1 (en) 1997-06-11
JPH03146891A (en) 1991-06-21
EP0420500A2 (en) 1991-04-03
EP0420500A3 (en) 1992-02-12

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