FR2385087A1 - Automatic mass measurement balance - uses opto-electronic detection of movement of moire fringes resulting from mechanical movement - Google Patents

Automatic mass measurement balance - uses opto-electronic detection of movement of moire fringes resulting from mechanical movement

Info

Publication number
FR2385087A1
FR2385087A1 FR7708510A FR7708510A FR2385087A1 FR 2385087 A1 FR2385087 A1 FR 2385087A1 FR 7708510 A FR7708510 A FR 7708510A FR 7708510 A FR7708510 A FR 7708510A FR 2385087 A1 FR2385087 A1 FR 2385087A1
Authority
FR
France
Prior art keywords
movement
moire fringes
platform
balance
mass measurement
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
FR7708510A
Other languages
French (fr)
Other versions
FR2385087B1 (en
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.)
Pitney Bowes Inc
Original Assignee
Pitney Bowes 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 Pitney Bowes Inc filed Critical Pitney Bowes Inc
Priority to FR7708510A priority Critical patent/FR2385087A1/en
Publication of FR2385087A1 publication Critical patent/FR2385087A1/en
Application granted granted Critical
Publication of FR2385087B1 publication Critical patent/FR2385087B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G23/00—Auxiliary devices for weighing apparatus
    • G01G23/18—Indicating devices, e.g. for remote indication; Recording devices; Scales, e.g. graduated
    • G01G23/36—Indicating the weight by electrical means, e.g. using photoelectric cells
    • G01G23/361—Indicating the weight by electrical means, e.g. using photoelectric cells using photoelectric cells

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

A mass is measured in a balance in which an optoelectronic system detects movement caused by the mass. This movement causes modulation of light to produce movement of moire fringes which is sensed by an optoelectronic system. A balance (10) has a platform (14) to support a load and which moves vertically on a plunger (16) on which crank arms (18, 20) are mountd to pivot to produce linear movement of the platform. A moire optoelectronic transducer (38) slides n vertical guide shafts (34, 36) between base pieces (26, 28) on the detector (12). Platform movement is transferred by a shaft (52) to move the transducer. This modulates light beam to cause movemnt of moire fringes measured by photoele ctric cells.
FR7708510A 1977-03-22 1977-03-22 Automatic mass measurement balance - uses opto-electronic detection of movement of moire fringes resulting from mechanical movement Granted FR2385087A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7708510A FR2385087A1 (en) 1977-03-22 1977-03-22 Automatic mass measurement balance - uses opto-electronic detection of movement of moire fringes resulting from mechanical movement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7708510A FR2385087A1 (en) 1977-03-22 1977-03-22 Automatic mass measurement balance - uses opto-electronic detection of movement of moire fringes resulting from mechanical movement

Publications (2)

Publication Number Publication Date
FR2385087A1 true FR2385087A1 (en) 1978-10-20
FR2385087B1 FR2385087B1 (en) 1982-08-20

Family

ID=9188403

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7708510A Granted FR2385087A1 (en) 1977-03-22 1977-03-22 Automatic mass measurement balance - uses opto-electronic detection of movement of moire fringes resulting from mechanical movement

Country Status (1)

Country Link
FR (1) FR2385087A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB921490A (en) * 1960-11-04 1963-03-20 Oertling Ltd Improvements in or relating to balances for fine weighing
US3757126A (en) * 1972-08-28 1973-09-04 Bendix Corp Input stage amplifier gain and balance method of setting moire fringe transducer reading head skew angle and
US3867037A (en) * 1973-08-29 1975-02-18 Dynamics Res Corp Linear motion encoder
US3923110A (en) * 1975-02-12 1975-12-02 Leonard Sa Ets Precision displacement measuring device for an electronic read-out platform scale

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB921490A (en) * 1960-11-04 1963-03-20 Oertling Ltd Improvements in or relating to balances for fine weighing
US3757126A (en) * 1972-08-28 1973-09-04 Bendix Corp Input stage amplifier gain and balance method of setting moire fringe transducer reading head skew angle and
US3867037A (en) * 1973-08-29 1975-02-18 Dynamics Res Corp Linear motion encoder
US3923110A (en) * 1975-02-12 1975-12-02 Leonard Sa Ets Precision displacement measuring device for an electronic read-out platform scale

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NV2270/76 *

Also Published As

Publication number Publication date
FR2385087B1 (en) 1982-08-20

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Legal Events

Date Code Title Description
ST Notification of lapse