DE20016638U1 - Interface between analog-digital converter and strain gauge (DMS) for measuring strains on solids - Google Patents

Interface between analog-digital converter and strain gauge (DMS) for measuring strains on solids

Info

Publication number
DE20016638U1
DE20016638U1 DE20016638U DE20016638U DE20016638U1 DE 20016638 U1 DE20016638 U1 DE 20016638U1 DE 20016638 U DE20016638 U DE 20016638U DE 20016638 U DE20016638 U DE 20016638U DE 20016638 U1 DE20016638 U1 DE 20016638U1
Authority
DE
Germany
Prior art keywords
strain gauge
resistors
bridge
analog
interface
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.)
Expired - Lifetime
Application number
DE20016638U
Other languages
German (de)
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE20016638U priority Critical patent/DE20016638U1/en
Publication of DE20016638U1 publication Critical patent/DE20016638U1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
    • G01B7/18—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge using change in resistance
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
    • G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
    • G01L1/225—Measuring circuits therefor
    • G01L1/2262—Measuring circuits therefor involving simple electrical bridges

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Description

BeschreibungDescription

Schnittstelle zwischen Dehn-Mess-Streifen und AuswertgerätInterface between strain gauge and evaluation device

Zur DMS-Messung werden Brückenschaltungen, je nach Messaufgabe von Hand erstellt ( gelötet) und dadurch unlösbar mit dem DMS verbunden.. Somit ist für jede Messung eine eigene Messbrücke anzufertigen.For strain gauge measurements, bridge circuits are created by hand (soldered) depending on the measuring task and are thus permanently connected to the strain gauge. A separate measuring bridge must therefore be made for each measurement.

Durch den, von den Antragstellern entwickelten, frei zu konfigurierenden Brückenaufbau, ist es möglich auf die Lötarbeit zu verzichten.The freely configurable bridge structure developed by the applicants makes it possible to dispense with soldering work.

Dies ist mit der in 2 beschriebenen Messbrücke möglich.This is possible with the measuring bridge described in 2.

Durch die Verwendung der Brückenschaltung lassen sich mehrere Messungen mit einem Messaufbau erzielen. Dadurch ist eine Zeiteinsparung möglich. Mehrere Messmethoden ( Dehnung, Biegung und Weitere Grossen ) sind mittels umlegen von Schaltern an der Messbrücke möglich.By using the bridge circuit, several measurements can be achieved with one measuring setup. This saves time. Several measuring methods (stretching, bending and other quantities) are possible by switching switches on the measuring bridge.

• · f ·· f ·

zu Fig.1to Fig.1

Pos.Nr.Pos.No. BezeichnungDesignation 11 Versorgungspannung
für die Brücken-schaltungSupply voltage
for the bridge circuit 22 Abgreifen der
Mess-spannung als
Eingangs-signal für den Analog-
DigitalwandlerTapping the
Measuring voltage as
Input signal for the analog
Digital converter 33 MasseDimensions 44 Wechselschalter
Umschalten zwischen DMS und
Messwiderstand
(120 &OHgr;)Changeover switch
Switching between DMS and
Measuring resistance
(120 Ω) 55 Anzuschliessender Dehn-Mess-
StreifenConnectable strain gauge
Stripes

zu Fig.2to Fig.2

Pos.Nr.Pos.No. BezeichnungDesignation 11 PC zur MessdatenauswertungPC for measurement data evaluation 22 Analog-DigitalwandlerAnalog-digital converter 33 Objekt der
Gebrauchmusterschutzanmeldung
(Schnittstelle) Object of the
Utility model protection application
(Interface) 44 DMS an zu messendem Objekt
appliziertStrain gauge on object to be measured
applied

Claims (2)

1. Wheatstonesche Brückenschaltung zur DMS-Messung dadurch gekennzeichnet, dass zwei Widerstände in reihe geschaltet sind, und diese wiederum mit zwei weiteren, ebenfalls in reihe gaschalteten, parallel geschaltet sind. Zwischen den beiden parallel geschalteten Widerstandspaaren lässt sich eine Spannung messen, wenn an den parallelen Widerstandspaaren eine Quellspannung angebracht ist. Ist einer oder mehrere der Widerstände veränderbar, so ist diese Veränderung mit der Wheatstoneschen Brückenschaltung feststellbar. Diesen Effekt macht man sich in der DMS- Technik zu nutze, in der der veränderliche Widerstand durch den Dehn-Mess-Streifen darstellt wird. Es gibt in der DMS-Technik verschieden Arten von Brückenschaltungen, sie unterscheiden sich in der Anzahl der DMS (1 bis 4)in der Schaltung. 1. Wheatstone bridge circuit for strain gauge measurement, characterized in that two resistors are connected in series, and these in turn are connected in parallel with two others, also connected in series. A voltage can be measured between the two pairs of resistors connected in parallel if a source voltage is applied to the parallel pairs of resistors. If one or more of the resistors can be changed, this change can be detected using the Wheatstone bridge circuit. This effect is used in strain gauge technology, in which the variable resistance is represented by the strain gauge strip. There are various types of bridge circuits in strain gauge technology, which differ in the number of strain gauges ( 1 to 4 ) in the circuit. 2. Messbrücke nach Schutzanspruch 1 dadurch gekennzeichnet, dass die DMS (Fig. 1 Nr. 5) in der Brückenschaltung nicht unlösbar mit den unveränderlichen Widerständen verbunden sind. Es sind 4 Steckplätze für DMS vorhanden, die Brückenkonfiguration (Viertel-, Halb-, Vollbrückenschaltung) ist durch Schalter (Fig. 1 Nr. 4) einzustellen. Die Spannungsversorgung wird über Leiter 1 und 3 (Fig. 1) hergestellt. 2. Measuring bridge according to claim 1, characterized in that the strain gauges ( Fig. 1 No. 5) in the bridge circuit are not permanently connected to the fixed resistors. There are 4 slots for strain gauges, the bridge configuration (quarter, half, full bridge circuit) can be set using switches ( Fig. 1 No. 4). The voltage supply is established via conductors 1 and 3 ( Fig. 1).
DE20016638U 2000-09-09 2000-09-09 Interface between analog-digital converter and strain gauge (DMS) for measuring strains on solids Expired - Lifetime DE20016638U1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE20016638U DE20016638U1 (en) 2000-09-09 2000-09-09 Interface between analog-digital converter and strain gauge (DMS) for measuring strains on solids

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE20016638U DE20016638U1 (en) 2000-09-09 2000-09-09 Interface between analog-digital converter and strain gauge (DMS) for measuring strains on solids

Publications (1)

Publication Number Publication Date
DE20016638U1 true DE20016638U1 (en) 2001-05-31

Family

ID=7946971

Family Applications (1)

Application Number Title Priority Date Filing Date
DE20016638U Expired - Lifetime DE20016638U1 (en) 2000-09-09 2000-09-09 Interface between analog-digital converter and strain gauge (DMS) for measuring strains on solids

Country Status (1)

Country Link
DE (1) DE20016638U1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101329161B (en) * 2007-06-22 2011-10-05 上海自动化仪表股份有限公司 Multifunctional static strain indicator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101329161B (en) * 2007-06-22 2011-10-05 上海自动化仪表股份有限公司 Multifunctional static strain indicator

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Legal Events

Date Code Title Description
R086 Non-binding declaration of licensing interest
R207 Utility model specification

Effective date: 20010705

R156 Lapse of ip right after 3 years

Effective date: 20040401