NL8303746A - Shaft distortion measuring unit using strain gauges - mounted on rotating shaft and linked to static indicating equipment via FM radio link for detection of torsion, compression or bending - Google Patents
Shaft distortion measuring unit using strain gauges - mounted on rotating shaft and linked to static indicating equipment via FM radio link for detection of torsion, compression or bending Download PDFInfo
- Publication number
- NL8303746A NL8303746A NL8303746A NL8303746A NL8303746A NL 8303746 A NL8303746 A NL 8303746A NL 8303746 A NL8303746 A NL 8303746A NL 8303746 A NL8303746 A NL 8303746A NL 8303746 A NL8303746 A NL 8303746A
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- NL
- Netherlands
- Prior art keywords
- deformation
- shaft
- fractions
- linked
- bending
- Prior art date
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Classifications
-
- 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
- G01L1/2206—Special supports with preselected places to mount the resistance strain gauges; Mounting of supports
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- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/02—Rotary-transmission dynamometers
- G01L3/04—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft
- G01L3/10—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating
- G01L3/108—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving resistance strain gauges
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
Description
» ί - <- < Μ Κοη/ΗΗ,3Techno i -1-»Ί - <- <Μ Κοη / ΗΗ, 3Techno i -1-
Inrichting voor het meten van vervorming van een as.Device for measuring deformation of an axis.
De uitvinding betreft een inrichting volgens de aanhef van conclusie 1.The invention relates to a device according to the preamble of claim 1.
Een dergelijke inrichting is bekend uit het Amerikaanse octrooischrift 3.850.030. Daarbij bestaan vervormings-5 fracties uit plaatselijke verzwakte secties van een staaf, die daardoor als een drieledig vervormingslichaam is op te vatten, waarvan de als scharnieren uitgevoerde vervormings-fracties de drie leden onderling scharnierbaar verbinden. De onderlinge hoekverdraaiing tussen de leden is de kenmerkende 10 meetwaarde voor het bepalen van de torsievervorming van de as. Bij torsievervorming van de as en een desbetreffend onderling zwenken van de leden van het vervormingselement neemt de vereiste lengte van het vervormingselement tussen zijn verbindingsfracties toe, zodat flinke krachten op het 15 vervormingselement en zijn bevestigingsmiddelen worden uitgeoefend, die de meting nadelig kunnen beïnvloeden.Such a device is known from US patent 3,850,030. In this case, deformation fractions consist of locally weakened sections of a rod, which can therefore be regarded as a three-part deformation body, the deformation fractions of which are formed as hinges and hinge the three members together. The mutual angular rotation between the members is the characteristic measurement value for determining the torsional deformation of the shaft. In case of torsional deformation of the shaft and a relative pivoting of the members of the deformation element, the required length of the deformation element increases between its connecting fractions, so that considerable forces are exerted on the deformation element and its fastening means, which can adversely affect the measurement.
De uitvinding heeft ten doel de nauwkeurigheid van de meting te vergroten.The object of the invention is to increase the accuracy of the measurement.
Daartoe is elke vervormingsfractie in hoofdzaak 20 U-vormig. Zeer praktische uitvoeringsvormen van de inrichting volgens de uitvinding zijn nader in de conclusies 2 en 3 aangeduid.For this purpose, each deformation fraction is substantially U-shaped. Very practical embodiments of the device according to the invention are further indicated in claims 2 and 3.
De inrichting volgens de uitvinding is niet alleen toepasbaar voor het meten van de torsievervorming maar ook 25 voor het meten van buig- en/of compressievervorming van de as.The device according to the invention is not only applicable for measuring the torsional deformation, but also for measuring bending and / or compression deformation of the shaft.
De uitvinding zal in de hierna volgende beschrijving aan de hand van een tekening worden verduidelijkt.The invention will be elucidated in the following description with reference to a drawing.
In de tekening stellen schematisch voor: 30 De figuren 1 en 4 een zijaanzicht van een as met telkens een andere inrichting volgens de uitvinding, figuur 2 op grotere schaal een aanzicht van detail II van figuur 1, figuur 3 een schakelschema van op de inrichting 35 volgens de uitvinding aangesloten apparatuur, en figuur 5 op grotere schaal een aanzicht van detail 8303746 -2- t $ V van figuur 4.In the drawing schematically represent: Figures 1 and 4 a side view of an axle with a different device according to the invention, figure 2 on a larger scale, a view of detail II of figure 1, figure 3 a circuit diagram of the device 35 equipment connected according to the invention, and figure 5 is a larger-scale view of detail 8303746 -2-t $ V of figure 4.
Op een roterend gelegerde as 1 is een inrichting 2 aangebracht, die twee vervormingselementen 3 omvat. Elk ver-vormingselement 3 heeft twee paar, elk tot een gesloten lus 5 onderling verbonden vervormingsfracties 5 die aan weerszijden van een ermee verbonden tand 6 van een verbindingsfractie 7 en tussen de ermee verbonden tanden 8 van een verbindingsfractie 9 zijn opgesteld. De verbindingsfracties 7 en 9 verbinden de vervormingsfracties 5 met bevestigingsfracties 10, 10 die middels door pasgaten 12 van de bevestigingsfracties 10 gestoken passchroeven 11 stevig verbonden zijn aan de onderling middels bouten 13 verbonden helften van op de as 1 geklemde klemmanchetten 14.A device 2, which comprises two deformation elements 3, is arranged on a rotationally alloyed shaft 1. Each deformation element 3 has two pairs, each connected to a closed loop 5, by deformation fractions 5 arranged on either side of an associated tooth 6 of a connection fraction 7 and between the associated teeth 8 of a connection fraction 9. The connecting fractions 7 and 9 connect the deformation fractions 5 to fastening fractions 10, 10 which are firmly connected by means of adjusting screws 11 passed through pass holes 12 of the fastening fractions 10 to the halves of clamping sleeves 14 clamped to the shaft 1 mutually connected by bolts 13.
De klemmanchetten 14 zijn op uit elkaar gelegen 15 bevestigingszones 15 van de as 1 aangebracht. Aan de buitenzijde van de ü-vormige vervormingsfracties 5 zijn rekstrook-jes 4 aangebracht op die plaats, waar de buigvervorming van de vervormingsfracties 5 het grootst is. De op de vervormingsfracties 5 uitgeoefende vervormingskrachten K en twee 20 maal 1/2K, vervormen de lussen gemakkelijk, zodat de vervorming van de verbindingsfracties 7 en 9 nihil is en de vervorming van de as 1 ter plaatse van de vervormingszones 16 bij de rekstrookjes 4 zeer goed tot uitdrukking komt. De vervormingszones 16 worden met behulp van hefbomen 17 met een 25 flinke lengte op buiging belast bij verhoudingsgewijs geringe kracht K. Bij een bekende radius £, waarop het vervormings-element 3 ten opzichte van de hartlijn 18 van de as 1 is aangebracht bij een bekende afstand t^ tussen inwendige mesranden 19 van de klemmanchetten 14 kan uit de buigvervorming van de 30 vervormingsfracties 5 de torsievervorming van de as 1 en daarmee het op de as 1 uitgeoefende torsiemoment nauwkeurig worden afgeleid.The clamping sleeves 14 are arranged on spaced apart mounting zones 15 of the shaft 1. Strain gauges 4 are provided on the outside of the ü-shaped deformation fractions 5 at the location where the bending deformation of the deformation fractions 5 is greatest. The deformation forces K and two 20 times 1 / 2K applied to the deformation fractions 5 easily deform the loops, so that the deformation of the connection fractions 7 and 9 is nil and the deformation of the shaft 1 at the deformation zones 16 at the strain gauges 4 is very well expressed. The deformation zones 16 are loaded on bending by means of levers 17 with a considerable length at relatively small force K. At a known radius £, on which the deformation element 3 is arranged with respect to the axis 18 of the shaft 1 in a known distance t ^ between internal knife edges 19 of the clamping sleeves 14, the torsional deformation of the shaft 1 and thus the torque applied to the shaft 1 can be accurately derived from the bending deformation of the deformation fractions 5.
Daartoe zijn de rekstrookjes 4a, 4b, 4c en 4d in de in figuur 3 getekende opstelling in een meetbrug opgenomen 35 die aangesloten is op een door een voedingsbron 21 gevoede, met de as 1 mee roterende FM modulator 22 die draadloos is gekoppeld met een op een presenteerinrichting 24 aangesloten 8303746 -3- -V . -¾ statische demodulator 23.For this purpose, the strain gauges 4a, 4b, 4c and 4d are included in a measuring bridge in the arrangement shown in figure 3, which is connected to an FM modulator 22 fed by a power source 21 and rotating with the axis 1, which is wirelessly coupled to an a display device 24 connected 8303746 -3- -V. -¾ static demodulator 23.
Bij de inrichting 32 van de figuren 4 en 5 zijn twee vervormingselementen 33 aanwezig die ten opzichte van de vervormingselementen 3 afwijken, doordat de richting van het 5 samenstel van vier vervormingsfracties 35 in de figuren 4 en 5 over 90" staat verdraaid ten opzichte van de in de figuren 1 en 2 getoonde richting. Met deze vervormingselementen 33 is daardoor zowel de compressievervorming als de buigvervorming van de as 1 te meten. Daartoe hebben de verbindingsfracties 10 37 en 39 de in figuur 5 getoonde vorm.In the device 32 of figures 4 and 5, two deformation elements 33 are present which deviate from the deformation elements 3, in that the direction of the assembly of four deformation fractions 35 in figures 4 and 5 is rotated by 90 "relative to the direction shown in Figures 1 and 2. As a result, these deformation elements 33 can measure both the compression deformation and the bending deformation of the shaft 1. For this purpose, the connecting fractions 37 and 39 have the shape shown in Figure 5.
83037468303746
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL8303746A NL8303746A (en) | 1983-10-31 | 1983-10-31 | Shaft distortion measuring unit using strain gauges - mounted on rotating shaft and linked to static indicating equipment via FM radio link for detection of torsion, compression or bending |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL8303746 | 1983-10-31 | ||
| NL8303746A NL8303746A (en) | 1983-10-31 | 1983-10-31 | Shaft distortion measuring unit using strain gauges - mounted on rotating shaft and linked to static indicating equipment via FM radio link for detection of torsion, compression or bending |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL8303746A true NL8303746A (en) | 1985-05-17 |
Family
ID=19842639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL8303746A NL8303746A (en) | 1983-10-31 | 1983-10-31 | Shaft distortion measuring unit using strain gauges - mounted on rotating shaft and linked to static indicating equipment via FM radio link for detection of torsion, compression or bending |
Country Status (1)
| Country | Link |
|---|---|
| NL (1) | NL8303746A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3591363A1 (en) * | 2018-07-05 | 2020-01-08 | Hamilton Sundstrand Corporation | Piezo torque tube strain gauge with piezo generator |
| WO2020236671A1 (en) * | 2019-05-17 | 2020-11-26 | Massachusetts Institute Of Technology | Devices and methods for monitoring health and performance of a mechanical system |
-
1983
- 1983-10-31 NL NL8303746A patent/NL8303746A/en not_active Application Discontinuation
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3591363A1 (en) * | 2018-07-05 | 2020-01-08 | Hamilton Sundstrand Corporation | Piezo torque tube strain gauge with piezo generator |
| US20200011750A1 (en) * | 2018-07-05 | 2020-01-09 | Darrell E. Ankey | Piezo torque tube strain gauge with piezo generator |
| WO2020236671A1 (en) * | 2019-05-17 | 2020-11-26 | Massachusetts Institute Of Technology | Devices and methods for monitoring health and performance of a mechanical system |
| CN114144646A (en) * | 2019-05-17 | 2022-03-04 | 麻省理工学院 | Apparatus and method for monitoring health and performance of a mechanical system |
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| A1B | A search report has been drawn up | ||
| BV | The patent application has lapsed |