CN104019929B - Based on the Shaft Torque on-line testing method that current vortex relative displacement is measured - Google Patents
Based on the Shaft Torque on-line testing method that current vortex relative displacement is measured Download PDFInfo
- Publication number
- CN104019929B CN104019929B CN201410259311.XA CN201410259311A CN104019929B CN 104019929 B CN104019929 B CN 104019929B CN 201410259311 A CN201410259311 A CN 201410259311A CN 104019929 B CN104019929 B CN 104019929B
- Authority
- CN
- China
- Prior art keywords
- displacement
- arm
- damping
- reference arm
- rotating shaft
- 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.)
- Active
Links
Abstract
The present invention relates to a kind of Shaft Torque on-line testing method measured based on current vortex relative displacement, by snap ring, displacement measurement arm and Shifted Reference arm, supplemental support, damping-constraining Qi Deng mechanism, the measurement of torque of rotating shaft will be converted to the measurement to 2 relative displacements on axle dexterously.Relative displacement is measured and is adopted reflective electric vortex displacement transducer, there is the ability of the rugged surroundings such as anti-dust, greasy dirt, smog, humidity, and there is very high displacement measurement resolution and precision, Zero positioning can be carried out at any time, and carry out forward and reverse on-line testing, be particularly suitable for that the diameter of axle is large, rigidity is strong, torsion angle is little especially, the situation of work under bad environment uses.The present invention, simultaneously by aggregate measures such as ladder beam, restriction damping layer, supplemental support and free end addition of constraints dampers, reduces the impact of vibration on test result to greatest extent, improves measuring accuracy.
Description
Technical field
The present invention relates to a kind of torsion-testing method, particularly a kind of Shaft Torque on-line testing method measured based on current vortex relative displacement.
Background technology
Torsion-testing is the requisite contents such as various Machinery Products Development, quality inspection, optimal control, monitoring of working condition and fault diagnosis.Conventional torque of rotating shaft measuring method mainly contains strain-type and corner-type.Strain type adopts the classic method of pasting foil gauge at rotating shaft surface, suitable circuit is utilized to obtain signal, then analyzing and processing is carried out, this kind of sensor is because of in the torque measurement being widely used in static state and low speed rotation system with low cost and easy and simple to handle, shortcoming is humidity, temperature, vibration etc. can affect sensor life-span and functional reliability, and need the reliable power supply properly settled in rotating condition and signal transmission issues.Corner type essence is that indirect inspection moment of torsion is carried out at the torsional deflection angle by measuring axle, generally non-cpntact measurement can be realized, but because the rigidity of general rotating shaft is all very large, the actual torsional deflection angle produced is very little, is the key of corner-type torsion-testing method to the Measurement accuracy at machine microdeformation angle.
Through finding the literature search of prior art, the main method of existing measurement axle torsional deflection be by axle vertically certain distance two groups of grating be installed (hold grid, magnetic grid, grating) sensor, phase differential by measuring two pulse signals when axle rotates resolves torsional deflection angle and the moment of torsion of axle, paper as the people such as Chinese patent " the photo-electric reflection type dynamic torque method of testing CN201210388605.3 of equal diameter rotating shaft " and Ji little Jun deliver " a kind of design basis ground motion of axle torsional deflection dynamic measurement system ", the color mark sensor of responsive rotating speed and action torque is formed with reflective laser gauge head and the colour code band made on the rotary shaft, the phase differential of two pulse signals is detected by FPGA counting principle.The shortcoming of this method of testing be difficult to when being onsite application keep initial zero position constant, reliability is poor, poor anti jamming capability, measuring accuracy is limited.
Through finding the literature search of prior art, Chinese patent " torsional angle deformation measurer (CN200520034454.7) " and " the laser measuring device for measuring CN91222479.7 of torsion angle " individually disclose the method adopting dial gauge and laser measuring device for measuring to measure shaft distortion angle, but this mode can only be used for the test of the torsion angle of static shaft, be not suitable for turning axle and use.
Summary of the invention
The present invention be directed to the problem of the in-site measurement difficulty of larger rotation shaft dynamic torque, propose a kind of Shaft Torque on-line testing method measured based on current vortex relative displacement, axle torsional deflection is measured by eddy current displacement sensor, and then the method for testing of indirect inspection Shaft Torque, be especially applicable to larger rotation shaft and the use of severe industry spot
.
Technical scheme of the present invention is: a kind of Shaft Torque on-line testing method measured based on current vortex relative displacement, specifically comprises the steps:
1) torsion-testing apparatus measured based on relative displacement is set up: comprise tested rotating shaft, left and right snap ring, supplemental support, displacement measurement arm, reference arm, damping-constraining device, eddy current displacement sensor and metering circuit;
Left and right snap ring is individually fixed in the two ends of tested axle of walking around, and supplemental support is positioned at both left and right snap rings centre position, is installed in tested rotating shaft; The butt end of displacement measurement arm and reference arm connects firmly respectively by left and right snap ring and tested rotating shaft, together rotates with rotating shaft;
The other end taper end of displacement measurement arm and reference arm is freely placed in supplemental support, becomes free end, time static, displacement measurement arm and reference arm parallel to each other, and simultaneously parallelly turning shaft axis with survey, during motion, the free end of displacement measurement arm and reference arm can be free to slide along support cambered surface; The free end face of displacement measurement arm installs reflective electric vortex displacement transducer on reference arm, and the free end face of reference arm installs copper induction disk to displacement measurement arm place, forms the reference point to eddy displacement sensor;
Outside the free end of displacement measurement arm and reference arm, identical damping-constraining device is set respectively, the shell of damping-constraining device is fixed in supplemental support, eddy current displacement sensor is arranged on the free end of displacement measurement arm, forms with reference arm free end the relative reference point measuring displacement;
2) metering circuit is fixed in tested rotating shaft, output drive, to eddy current sensor, obtains the output signal of sensor, static or when not having a torque load in rotating shaft, the output correspondence system zero-bit of eddy current displacement sensor, demarcates system zero point;
3) during work there is torsional deflection in tested rotating shaft under by torque load effect, drive displacement measurement arm and reference arm generation relative movement, on eddy current displacement sensor and reference arm, the relative distance of copper disk reference point changes, under positive torque or reactive torque effect, eddy current displacement sensor signal exports and the proportional relation voltage signal of displacement, metering circuit Real-time Collection eddy current displacement sensor signal;
4) be vertically directly proportional to torque load to axial displacement, scale-up factor determines by measuring component, and metering circuit calculates real-time torque load data according to collection signal, wirelessly sends.
Described damping-constraining device alternative mechanical damping or fluid damping, select damper performance parameter according to measurement range and resolution requirement.
Institute's displacement measurement arm is identical with reference arm structure, have employed the ladder beam structure of high rigidity, and girder construction surface arranges restriction damping layer and viscoelastic layer, and when being subject to effect of vibration, damping layer generation detrusion makes the energy of mechanical vibration change into heat energy.
Supplemental support on described measured axis connects firmly a pair damping-constraining device, a pair damping-constraining device one end is fixed in supplemental support, and the other end is fixed on gage beam and reference arm.
Beneficial effect of the present invention is: the present invention is based on the Shaft Torque on-line testing method that current vortex relative displacement is measured, and is not used in traditional strain or phase differential test thinking, and is converted to the measurement of displacement.Compared with prior art, eddy current displacement sensor has very strong link adaptive faculty, has the ability of the rugged surroundings such as anti-dust, greasy dirt, smog, humidity, is thus applicable to severe industry spot and uses, have very high reliability and long-time stability; Eddy current displacement sensor has very high displacement measurement resolution and precision, and commercial sensor is easy in small-range scope the measuring accuracy reaching 0.01um.Thus the high precision measurement of the small torsional deflection of large-diameter size is applicable to; Calibration and the zero correction of test macro easily realize, and can carry out Zero positioning at any time in a static condition, be different from phase-difference type measuring method, must could calibrate zero-bit under the unloaded rotating condition of axle.
Accompanying drawing explanation
Fig. 1 is measuring principle schematic diagram of the present invention;
Fig. 2 is the torsion-testing scheme schematic diagram that the present invention is based on relative displacement measurement;
Fig. 3 is reference arm structural representation of the present invention;
Fig. 4 is damping-constraining device of the present invention and connection diagram thereof;
Fig. 5 is metering circuit functional block diagram of the present invention.
Embodiment
Measuring principle schematic diagram of the present invention as shown in Figure 1, for two somes A, the B of L in a distance in rotating shaft, when axle rotates with certain torque load, A, B 2 can produce relative torsional deflection.The relative torsional deflection angle θ that axial distance L produces:
θ=ML／JG
In formula: J is the polar moment of inertia in measured axis cross section; M is torque load; G is axle shear elasticity.
Because deformation angle θ is very little, the relation between it and vertical and axial displacement deformation Δ s can be equivalent to:
So relative displacement Δ s is directly proportional to moment of torsion, wherein k is by the scale-up factor measuring component decision, can carry out in advance testing and demarcating.Therefore indirectly testing torque load M can be carried out by test relative displacement Δ s.
Under this guidance of principle, Fig. 2 gives the torsion-testing scheme schematic diagram measured based on relative displacement, comprises tested rotating shaft 1, left and right snap ring 2 and 3, supplemental support 4, displacement measurement arm 5, reference arm 6, damping-constraining device 7, eddy current displacement sensor 8 and metering circuit 9.
Left and right snap ring 2,3 is fixed on the two ends of tested rotating shaft 1, and supplemental support 4 is positioned at both left and right snap rings 2,3 centre position, is installed in tested rotating shaft 1; The butt end of displacement measurement arm 5 and reference arm 6 connects firmly respectively by left and right snap ring 2,3 and tested rotating shaft 1, together rotates with rotating shaft.The other end (taper end) of displacement measurement arm 5 and reference arm 6 is freely placed in supplemental support 4, time static, displacement measurement arm 5 and reference arm 6 parallel to each other, and simultaneously parallel axle 1 axis of walking around with survey, during motion, the free end (taper end) of displacement measurement arm 5 and reference arm 6 can be free to slide along support cambered surface.The free end (taper end) of displacement measurement arm 5 installs reflective electric vortex displacement transducer 8 on reference arm 6, and the free end (taper end) of reference arm 6 installs copper induction disk 9 towards displacement measurement arm 5 place, forms the reference point to eddy displacement sensor 8.In order to overcome the measuring error because mechanical vibration cause, identical damping-constraining device 7 is set respectively outside the free end of displacement measurement arm 5 and reference arm 6.The shell of damping-constraining device 7 to be fixed in supplemental support 4 (in supplemental support 4, damping-constraining device 7 is installed at the moving range place that the free end of displacement measurement arm 5 and reference arm 6 is placed in supplemental support 4, can be used for the measuring error overcome because mechanical vibration cause), damping-constraining device 7 can adopt mechanical damping or fluid damping, needs according to measurement range and resolution requirement choose reasonable damper performance parameter.Eddy current displacement sensor 8 is arranged on the free end of displacement measurement arm 5, forms with reference arm 6 free end the relative reference point measuring displacement.Metering circuit 10 is fixed in tested rotating shaft 1, is responsible for encouraging eddy current sensor 8, obtains the output signal of sensor 8, it is wirelessly sent after conditioning, modulation.
In order to overcome the impact of shafting vibration on test result, for displacement measurement arm 5 and reference arm 6, except arranging except damping-constraining device 7 at its free end, reference arm structural representation as shown in Figure 3, have employed the ladder beam structure of high rigidity in shape, and damping-constraining Rotating fields is set on its surface, namely at the additional restriction damping layer (aluminium or carbon fiber) with homalographic in base layer structure surface and viscoelastic layer (bonded adhesives) (in the layering of ladder beam body structure surface), when being subject to effect of vibration, damping layer generation detrusion thus make the energy of mechanical vibration change into thermal energy consumption to dissipate, reach the object effectively reducing resonance.The free end of reference arm 6 arranges the copper disk of a surfacing as vortex induction district, and disk diameter is 3-5 times of sensor diameter; The structure of displacement measurement arm 5 is identical with reference arm 6, just copper disk position displacement transducer 8 is replaced, and makes the copper disk 9 of the displacement transducer 8 of displacement measurement arm 5 and reference arm 6 just right; Both effective lengths are also identical, when effective length is for rotating, axial length is exactly displacement measurement arm 5 and the snap ring 3 point of fixity distance to displacement transducer 8 to displacement measurement arm 5, is exactly reference arm 6 and the snap ring 2 point of fixity distance to copper disk 9 center to reference arm 6; Displacement transducer 8 adopts range ability to be 1mm, measuring accuracy reaches the KD2306 high precision electro eddy displacement sensor of 0.1 μm, it has the ability of the rugged surroundings such as anti-dust, greasy dirt, smog, humidity, operating temperature range-55 DEG C-105 DEG C, is applicable to severe industry spot and uses.As shown in Figure 4, supplemental support 4 structure connected firmly on measured axis is crucial parts, both can bracing displacement gage beam 5 and reference arm 6, displacement measurement arm 5 and reference arm 6 can not be made again to depart from, a pair damping-constraining device 7 one end is fixed in supplemental support 4, the other end is fixed on gage beam 5 or reference arm 6, and the free end of displacement measurement arm and reference arm all flexibly connects with damper, for suppressing the vertically opposite vibration of gage beam 5 and reference arm 6.
During work there is torsional deflection in tested rotating shaft 1 under by torque load effect, drive displacement measurement arm 5 and reference arm 6 that relative movement occurs, thus eddy current displacement sensor 8 is changed with the relative distance of copper disk 9 reference point on reference arm 6, under positive torque or reactive torque effect, this relative distance increases or reduces, and eddy current displacement sensor 8 exports and the proportional relation voltage signal of displacement.Static or when not having a torque load, the output correspondence system zero-bit of eddy current displacement sensor 8, so can demarcate zero point system at any time easily in rotating shaft 1.
As shown in Figure 5, the power module, Signal-regulated kinase, signal acquisition module, the wireless transport module that comprise of metering circuit 10.The voltage signal that eddy current displacement sensor 8 exports, after filtering conditioning and A/D conversion, is transferred out by CC1100 micropower wireless data transmission module.Whole metering circuit is by microprocessor MSP430 cooperation control.Power supply can adopt battery or slip ring form.
Claims (4)
1., based on the Shaft Torque on-line testing method that current vortex relative displacement is measured, it is characterized in that, comprise the steps:
1) torsion-testing apparatus measured based on relative displacement is set up: comprise tested rotating shaft, left and right snap ring, supplemental support, displacement measurement arm, reference arm, damping-constraining device, eddy current displacement sensor and metering circuit;
Left and right snap ring is individually fixed in the two ends of tested rotating shaft, and supplemental support is positioned at both left and right snap rings centre position, is installed in tested rotating shaft; The butt end of displacement measurement arm and reference arm connects firmly respectively by left and right snap ring and tested rotating shaft, together rotates with tested rotating shaft;
The other end taper end of displacement measurement arm and reference arm is freely placed in supplemental support, becomes free end, time static, displacement measurement arm and reference arm parallel to each other, and being parallel to tested shaft axis simultaneously, during motion, the free end of displacement measurement arm and reference arm can be free to slide along support cambered surface; The free end face of displacement measurement arm installs reflective electric vortex displacement transducer on reference arm, and the free end face of reference arm installs copper induction disk to displacement measurement arm place, forms the reference point of eddy displacement sensor;
Outside the free end of displacement measurement arm and reference arm, identical damping-constraining device is set respectively, the shell of damping-constraining device is fixed in supplemental support, eddy current displacement sensor is arranged on the free end of displacement measurement arm, forms with reference arm free end the relative reference point measuring displacement;
2) metering circuit is fixed in tested rotating shaft, output drive is to eddy current displacement sensor, obtain the output signal of eddy current displacement sensor, static or when there is no a torque load in tested rotating shaft, the output correspondence system zero-bit of eddy current displacement sensor, demarcates system zero point;
3) during work there is torsional deflection in tested rotating shaft under torque load effect, drive displacement measurement arm and reference arm generation relative movement, on eddy current displacement sensor and reference arm, the relative distance of copper disk reference point changes, under positive torque or reactive torque effect, eddy current displacement sensor signal exports and the proportional relation voltage signal of displacement, metering circuit Real-time Collection eddy current displacement sensor signal;
4) displacement perpendicular to axial direction is directly proportional to torque load, and scale-up factor determines by measuring component, and metering circuit calculates real-time torque load data according to collection signal, wirelessly sends.
2. according to claim 1 based on the Shaft Torque on-line testing method that current vortex relative displacement is measured, it is characterized in that, described damping-constraining device alternative mechanical damping or fluid damping, select damper performance parameter according to measurement range and resolution requirement.
3. according to claim 1 based on the Shaft Torque on-line testing method that current vortex relative displacement is measured, it is characterized in that, institute's displacement measurement arm is identical with reference arm structure, have employed the ladder beam structure of high rigidity, girder construction surface arranges restriction damping layer and viscoelastic layer, when being subject to effect of vibration, damping layer generation detrusion makes the energy of mechanical vibration change into heat energy.
4. according to claim 1 based on the Shaft Torque on-line testing method that current vortex relative displacement is measured, it is characterized in that, supplemental support in described tested rotating shaft connects firmly a pair damping-constraining device, a pair damping-constraining device one end is fixed in supplemental support, and the other end is separately fixed on gage beam and reference arm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410259311.XA CN104019929B (en) | 2014-06-11 | 2014-06-11 | Based on the Shaft Torque on-line testing method that current vortex relative displacement is measured |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410259311.XA CN104019929B (en) | 2014-06-11 | 2014-06-11 | Based on the Shaft Torque on-line testing method that current vortex relative displacement is measured |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104019929A CN104019929A (en) | 2014-09-03 |
| CN104019929B true CN104019929B (en) | 2016-02-03 |
Family
ID=51436809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410259311.XA Active CN104019929B (en) | 2014-06-11 | 2014-06-11 | Based on the Shaft Torque on-line testing method that current vortex relative displacement is measured |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104019929B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104330198B (en) * | 2014-11-11 | 2016-08-24 | 中国船舶重工集团公司第七0四研究所 | Torque calibration measurement apparatus based on flexible support |
| CN105783764A (en) * | 2016-05-30 | 2016-07-20 | 中国船舶重工集团公司第七0四研究所 | Fiber bragg grating strain sensor calibrating device |
| CN109307471B (en) * | 2018-11-13 | 2020-08-21 | 福建福清核电有限公司 | Zero calibration method for displacement sensor of main water supply pump shaft of nuclear power station |
| CN112129440B (en) * | 2020-09-22 | 2022-04-29 | 陈会良 | Bob torque sensor |
| CN113390607B (en) * | 2021-05-14 | 2023-03-24 | 东方电气集团科学技术研究院有限公司 | Non-contact displacement testing method for flow-induced vibration of tube bundle structure |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86100336A (en) * | 1985-02-27 | 1987-01-07 | 巴马格·巴默机器制造股份公司 | The fibre tension measurement mechanism that has the fiber detector that to make elastic movement |
| US5083468A (en) * | 1987-09-02 | 1992-01-28 | Robert Bosch Gmbh | Device for measuring rotation angle and/or torque |
| CN101329155A (en) * | 2008-07-31 | 2008-12-24 | 中国核动力研究设计院 | Electric vortex type displacement clip |
| CN202119583U (en) * | 2011-01-24 | 2012-01-18 | 徐宗保 | Eddy type force moment sensor |
| CN102620873A (en) * | 2012-03-08 | 2012-08-01 | 陕西理工学院 | Double-eccentric dynamic torque and rotation speed sensor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080106627A (en) * | 2007-06-04 | 2008-12-09 | 주식회사알피엠텍 | The measurement system by using non-contact displacement sensors for torque and axial load |
-
2014
- 2014-06-11 CN CN201410259311.XA patent/CN104019929B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86100336A (en) * | 1985-02-27 | 1987-01-07 | 巴马格·巴默机器制造股份公司 | The fibre tension measurement mechanism that has the fiber detector that to make elastic movement |
| US5083468A (en) * | 1987-09-02 | 1992-01-28 | Robert Bosch Gmbh | Device for measuring rotation angle and/or torque |
| CN101329155A (en) * | 2008-07-31 | 2008-12-24 | 中国核动力研究设计院 | Electric vortex type displacement clip |
| CN202119583U (en) * | 2011-01-24 | 2012-01-18 | 徐宗保 | Eddy type force moment sensor |
| CN102620873A (en) * | 2012-03-08 | 2012-08-01 | 陕西理工学院 | Double-eccentric dynamic torque and rotation speed sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104019929A (en) | 2014-09-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104019929B (en) | Based on the Shaft Torque on-line testing method that current vortex relative displacement is measured | |
| US10641592B2 (en) | Ultra-light and ultra-accurate portable coordinate measurement machine with enhanced precision joints | |
| US9803973B1 (en) | Ultra-light and ultra-accurate portable coordinate measurement machine | |
| CN105277129A (en) | Dynamic noncontact rail gauge measuring system and method thereof | |
| CN103743338B (en) | There is sphere revolution runout error and compensate laser tracking measurement system and the compensation method thereof of function | |
| CN103115726B (en) | Rotating parts and components dynamic balance method based on strain | |
| CN104330198B (en) | Torque calibration measurement apparatus based on flexible support | |
| CN103344195B (en) | A kind of swing-arm profilometry gauge head of sensor rotation is to heart calibrating installation | |
| CN106643655B (en) | Gravity type fiber bragg grating inclination sensor | |
| CN105444949A (en) | Moment-of-inertia test bench based on torque sensor | |
| CN104154881A (en) | Measuring method for parallelism error of shaft hole end face of telescope four-way | |
| CN203688576U (en) | Fiber Bragg grating dynamic anemoclinograph | |
| CN105181195B (en) | Torque of rotating shaft and rotating speed measurement method | |
| CN107290085A (en) | The slight torque calibrating measuring device held based on elastic lifting | |
| CN104653408B (en) | The equipment and corresponding rotor blade that rotor blade for detecting wind power equipment deforms | |
| CN204165525U (en) | A kind of wireless detection device of crane box type girder web wave degree | |
| CN204064527U (en) | Based on the Shaft Torque online testing device that current vortex relative displacement is measured | |
| CN106123809A (en) | A kind of sub-rad level angle-measuring equipment | |
| CN102901487B (en) | Reluctance type inclination angle sensor | |
| CN110081839B (en) | Fiber bragg grating wide-range inclination sensor with cam structure | |
| CN208432333U (en) | A kind of table top assembly | |
| CN106595531A (en) | High-precision self-temperature-compensation FBG (fiber bragg grating) rotating angle sensor and method thereof | |
| CN205879132U (en) | Inferior rad level angle measurement device | |
| CN109916276A (en) | The concentric measuring instrument of high pressure rotor inner hole | |
| CN207197712U (en) | The slight torque calibrating measuring device held based on elastic lifting |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |