JPS6421323A - Load detection circuit for load cell type electronic scale - Google Patents

Load detection circuit for load cell type electronic scale

Info

Publication number
JPS6421323A
JPS6421323A JP62177745A JP17774587A JPS6421323A JP S6421323 A JPS6421323 A JP S6421323A JP 62177745 A JP62177745 A JP 62177745A JP 17774587 A JP17774587 A JP 17774587A JP S6421323 A JPS6421323 A JP S6421323A
Authority
JP
Japan
Prior art keywords
bridge circuit
load
strain gauges
detection circuit
cell type
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
JP62177745A
Other languages
Japanese (ja)
Other versions
JP2683633B2 (en
Inventor
Kazufumi Naito
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.)
Ishida Scales Manufacturing Co Ltd
Original Assignee
Ishida Scales Manufacturing Co 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 Ishida Scales Manufacturing Co Ltd filed Critical Ishida Scales Manufacturing Co Ltd
Priority to JP62177745A priority Critical patent/JP2683633B2/en
Priority to KR1019880008894A priority patent/KR970001610B1/en
Priority to EP88306570A priority patent/EP0299806B1/en
Priority to DE8888306570T priority patent/DE3879303T2/en
Publication of JPS6421323A publication Critical patent/JPS6421323A/en
Priority to US07/377,743 priority patent/US4951765A/en
Application granted granted Critical
Publication of JP2683633B2 publication Critical patent/JP2683633B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Measurement Of Force In General (AREA)
  • Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)

Abstract

PURPOSE:To lower power consumption of a bridge circuit, by forming a half bridge circuit with several strain gauges mounted on a straining body to detect a load. CONSTITUTION:Four strain gauges 2Ra and 2Rb stuck on a straining body form a half bridge circuit A and a connection point P between the strain gauges 2Ra and 2Rb is connected to a reference potential point COM through switches SW1 and SW2 for selecting a measuring mode and a drift correction mode. When such a half bridge circuit is formed, a synthetic resistance (r) amounts to 4R with Ra=Rb=R and operation is possible at a lower power than with a full bridge circuit. A temperature compensation resistance Rs provided on the straining body is connected to an operational amplifier B2 through a buffer B1 with respect to the strain gauge thereby enabling temperature compensation for a span irrelevant to a resistance value of the bridge circuit A.
JP62177745A 1987-07-16 1987-07-16 Load detection circuit for load cell type electronic balance Expired - Lifetime JP2683633B2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP62177745A JP2683633B2 (en) 1987-07-16 1987-07-16 Load detection circuit for load cell type electronic balance
KR1019880008894A KR970001610B1 (en) 1987-07-16 1988-07-16 Load detector circuit
EP88306570A EP0299806B1 (en) 1987-07-16 1988-07-18 Weighing device employing strain gauges
DE8888306570T DE3879303T2 (en) 1987-07-16 1988-07-18 WEIGHING APPARATUS WITH ELASTIC MEASURING STRIP.
US07/377,743 US4951765A (en) 1987-07-16 1989-07-10 Load detector circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62177745A JP2683633B2 (en) 1987-07-16 1987-07-16 Load detection circuit for load cell type electronic balance

Publications (2)

Publication Number Publication Date
JPS6421323A true JPS6421323A (en) 1989-01-24
JP2683633B2 JP2683633B2 (en) 1997-12-03

Family

ID=16036385

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62177745A Expired - Lifetime JP2683633B2 (en) 1987-07-16 1987-07-16 Load detection circuit for load cell type electronic balance

Country Status (1)

Country Link
JP (1) JP2683633B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7599644B2 (en) 2006-09-27 2009-10-06 Canon Kabushiki Kaisha Process cartridge and image forming apparatus that eliminates charge from the surface of a photosensitive member upstream of a sealing member contact portion

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7599644B2 (en) 2006-09-27 2009-10-06 Canon Kabushiki Kaisha Process cartridge and image forming apparatus that eliminates charge from the surface of a photosensitive member upstream of a sealing member contact portion

Also Published As

Publication number Publication date
JP2683633B2 (en) 1997-12-03

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Legal Events

Date Code Title Description
R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

EXPY Cancellation because of completion of term