JPS5647836A - Coordinate input method of weighing detective coordinate input unit - Google Patents

Coordinate input method of weighing detective coordinate input unit

Info

Publication number
JPS5647836A
JPS5647836A JP12314279A JP12314279A JPS5647836A JP S5647836 A JPS5647836 A JP S5647836A JP 12314279 A JP12314279 A JP 12314279A JP 12314279 A JP12314279 A JP 12314279A JP S5647836 A JPS5647836 A JP S5647836A
Authority
JP
Japan
Prior art keywords
force
coordinate
point
coordinate input
circuit
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.)
Pending
Application number
JP12314279A
Other languages
Japanese (ja)
Inventor
Masao Hotta
Yoshimitsu Oshima
Norio Yokozawa
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP12314279A priority Critical patent/JPS5647836A/en
Publication of JPS5647836A publication Critical patent/JPS5647836A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To compensate fluctuations, etc. of sensitivity and amplification degree of a circuit or a force detector, caused by time aging, and to enhance the coordinate detection accuracy, by making the coefficient of variation equal automatically in case of inputting the coordinate of the force applied point.
CONSTITUTION: When the face place is supported by 3 points, and the force which depresses 1 point of the face plate is applied, the component of force applied to each supporting point is converted to an electric signal by the force detectors 2aW2c, and after it has been made to pass through the processing circuit 3, the coordinate of the force applied point is calculated by the operation circuit 4. When performing the measurement, the unit is made an adjustment mode, force is applied to the center of gravity of a triangle made by 3 supporting points, β2=Va/Vb,β3=V2/Vc is derived by the division circuits 7b, 7c from the outputs Va, Vb, Vc of the processing circuits 3aW3c, and it is stored in the memories 6b, 6c. Subsequently, it is made a coordinate detective mode, and the coefficient of variation is all made equal by multiplying the outputs Vb, Vc of the processing circuit 3b, 3c by the correction value β2, β3 through the multiplication circuit 8b, 8c.
COPYRIGHT: (C)1981,JPO&Japio
JP12314279A 1979-09-27 1979-09-27 Coordinate input method of weighing detective coordinate input unit Pending JPS5647836A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12314279A JPS5647836A (en) 1979-09-27 1979-09-27 Coordinate input method of weighing detective coordinate input unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12314279A JPS5647836A (en) 1979-09-27 1979-09-27 Coordinate input method of weighing detective coordinate input unit

Publications (1)

Publication Number Publication Date
JPS5647836A true JPS5647836A (en) 1981-04-30

Family

ID=14853221

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12314279A Pending JPS5647836A (en) 1979-09-27 1979-09-27 Coordinate input method of weighing detective coordinate input unit

Country Status (1)

Country Link
JP (1) JPS5647836A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5833993A (en) * 1981-08-20 1983-02-28 Brother Ind Ltd Speed instructing device for motor
JPS616727A (en) * 1984-06-20 1986-01-13 Nec Home Electronics Ltd Position calibrating method for coordinate input device
US5614102A (en) * 1990-01-29 1997-03-25 Sakurada; Yasuyuki Method for purifying sewage

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4934247A (en) * 1972-07-28 1974-03-29
JPS5410632A (en) * 1977-06-27 1979-01-26 Toshiba Corp Position matching system for tablet device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4934247A (en) * 1972-07-28 1974-03-29
JPS5410632A (en) * 1977-06-27 1979-01-26 Toshiba Corp Position matching system for tablet device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5833993A (en) * 1981-08-20 1983-02-28 Brother Ind Ltd Speed instructing device for motor
JPH0356755B2 (en) * 1981-08-20 1991-08-29
JPS616727A (en) * 1984-06-20 1986-01-13 Nec Home Electronics Ltd Position calibrating method for coordinate input device
US5614102A (en) * 1990-01-29 1997-03-25 Sakurada; Yasuyuki Method for purifying sewage

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