CN103486958B - The tension installation method of a kind of magnetostrictive displacement sensor and waveguide filament thereof - Google Patents
The tension installation method of a kind of magnetostrictive displacement sensor and waveguide filament thereof Download PDFInfo
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Abstract
The tension installation method of a kind of magnetostrictive displacement sensor and waveguide filament thereof, this sensor comprises position magnet ring, measuring staff, there is joint and electronics storehouse, measuring staff comprises the capping of outer tube end face, outer tube and plastic insulation, waveguide rear end is located in plastic insulation covering, outer tube is located at outside plastic insulation covering, the end of waveguide and outer tube is located in the capping of outer tube end face, waveguide comprises waveguide filament, waveguide filament is located in fiberglass pipe, high temperature wire is provided with outside fiberglass pipe, fiberglass pipe is placed in inner sleeve together with high temperature wire, waveguide filament and high temperature wire are fixed on the tubular rivet of rear end, waveguide filament front end is fixed on the tubular rivet of front end.The present invention also comprises the tension installation method of waveguide filament.Waveguide filament of the present invention is in tensioning state in waveguide always, and flexibility is little, and linearity is high, and do not need external unit to support snap ring, little to the decay of distorting stress intensity of wave, the production debugging time is short, and measuring accuracy is high, reliable operation.
Description
Technical field
The present invention relates to the tension installation method of a kind of magnetostrictive displacement sensor and waveguide filament thereof.
Background technology
Magnetostrictive displacement sensor utilizes magnetostriction principle to intersect generation distorting stress wave pulse signal by two different magnetic fields to come measuring position exactly.Measuring sensor is a waveguide, and the waveguide filament in waveguide is made up of special magnetostriction materials.Measuring process is generation current pulse in the electronics storehouse by sensor, this current impulse is transmitted in waveguide filament, thus produce a circumferential magnetic field outward at waveguide filament, when this magnetic field and be enclosed within the magnetic field that waveguide produces as the position magnet ring of change in location intersect time, due to magnetostrictive effect, can produce a distorting stress wave pulse signal in waveguide filament, this distorting stress wave pulse signal transmits with fixing speed of sound, and very soon detected by electronics storehouse.Because this distorting stress wave pulse signal transmission time in waveguide filament and the distance between position magnet ring to electronics storehouse are directly proportional, by Measuring Time, just can highly precisely determine this distance.
Waveguide filament is the alloy of the materials such as a kind of iron, nickel, rare earth, and when this material is magnetized in magnetic field, can elongate or shorten along direction of magnetization, this phenomenon is called magneto-striction phenomenon.The generation of this phenomenon is because ferromagnetic or ferrimagnetic material, below Curie point, spontaneous magnetization occurs, and forms magnetic domain.In each magnetic domain, lattice is all along magnetization direction generation deformation.When applying external magnetic field, the magnetic domain of material internal random orientation rotates, and reached unanimity in the direction of magnetization of each magnetic domain and externally-applied magnetic field direction, namely the macroeffect that object externally shows elongates or shortens along outer magnetic field direction.
From modulating wave, demodulation is out by useful signal or waveform for signal demodulator.
Flatness refers to the maximum deviation distance between material surface and surface level, is that material is consistent with surface level the measurement index of degree.
Magnetostrictive displacement sensor forms primarily of measuring staff, electronics storehouse and the non-contacting position magnet ring be enclosed within measuring staff.During work, the electronics storehouse of sensor sends a current excitation pulse g to waveguide filament loop, and this pulse can form toroidal magnetic field a around the waveguide filament d in waveguide h.When the magnetic field c that this toroidal magnetic field a and position magnet ring b produces meets, waveguide filament d produces Widemanm effect, form distorting stress ripple e (as shown in Figure 1).Distorting stress ripple to be transmitted back to from the position at magnet ring place, position along waveguide filament in electronics storehouse with the speed of about 2800m/s and to be detected device f and records.Record the mistiming of driving pulse and detector arrangement Received signal strength, in conjunction with the velocity of propagation of distorting stress ripple in waveguide filament, the distance between position magnet ring and reference point can be determined.Magnetostrictive displacement sensor is widely used in metallurgical equipment, wind power generation, engineering machinery, rubber manufacturing machinery, harbour machinery, injection machine, new forms of energy and other industrial automations, for user provide in real time, continuously, reliable, accurate straight-line displacement measures.
The core component waveguide filament of magnetostrictive displacement sensor, its flatness directly affects the measuring accuracy of sensor.In order to the waste caused when reducing transportation cost and reduce production feeding, waveguide filament is all that employing one whole packaged form being rolled into multi-turn transports, but the internal stress produced after volume makes waveguide wire there is certain flexibility, thus have impact on the raising of magnetostrictive displacement sensor measuring accuracy.
In prior art, waveguide filament is fixed in a plastic chamber, re-uses external unit plastic support snap ring and is held up by waveguide filament, keeps extended configuration.There is following defect in it: use and support the fixing waveguide filament of snap ring, its flatness is poor; Directly contact with waveguide filament owing to supporting snap ring, so support the part distorting stress ripple of snap ring meeting absorbing waveguides silk generation, namely decayed stress wave intensity, thus it is higher to the requirement of signal demodulator circuit, make circuit design more complicated, the requirement of software process is higher, increases production difficulty; Product is in vibration environment, can there is the shake of certain frequency between support member and waveguide filament, and measuring accuracy can reduce, and product reliability is deteriorated.
Summary of the invention
The technical problem to be solved in the present invention is, overcome the above-mentioned defect that prior art exists, there is provided one to be conducive to improving waveguide filament flatness, be conducive to reducing the tension installation method of Bending Deformation that waveguide filament produces under gravity and the high magnetostrictive displacement sensor based on waveguide filament tension mode of measuring accuracy and waveguide filament thereof.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of magnetostrictive displacement sensor, comprise position magnet ring, measuring staff, there is joint and electronics storehouse, measuring staff comprises the capping of outer tube end face, outer tube and plastic insulation, waveguide rear end is located in plastic insulation covering, outer tube is located at outside plastic insulation covering, the end of waveguide and outer tube is located in the capping of outer tube end face, waveguide comprises waveguide filament, waveguide filament is located in fiberglass pipe, high temperature wire is provided with outside fiberglass pipe, fiberglass pipe is placed in inner sleeve together with high temperature wire, waveguide filament rear end is provided with rear end damping, rear end damping is fixed by rear end plug, waveguide filament and high temperature wire are fixed on the tubular rivet of rear end.Waveguide filament front end is provided with front end damping, and front end damping is fixed by front end plug, and waveguide filament front end is fixed on the tubular rivet of front end.
Further, described waveguide filament front end is provided with front glue shell, front glue shell is located at outside inner sleeve, front glue shell one end is provided with support, support is connected with front glue shell by screw by one end of support, and the other end is welded and fixed the front end of waveguide filament by front end tubular rivet, and waveguide filament is in the centre of inner sleeve, by nickel sheet, waveguide filament is connected to the circuit board of magnetostrictive displacement sensor at support near the position of front glue shell, props up and be set up in outside the damping of front end.
A kind of tension installation method of waveguide filament of magnetostrictive displacement sensor as previously mentioned: inner sleeve is put into after putting fiberglass pipe in waveguide filament rear end together with high temperature wire, then successively through rear end damping and rear end plug, then waveguide filament and higher temperature line are welded on the tubular rivet of rear end; Waveguide filament front end is successively through front glue shell, support, front end damping, front end plug, again inner sleeve is fixed, then at waveguide filament front end suspention counterweight, make waveguide filament be in tension in inner sleeve, finally waveguide filament is welded on the tubular rivet of front end.
Further, the weight of described counterweight is preferably 1.5kg.
Learn through experiment test, when the weight of counterweight is less than 1.5kg, the pulling force that counterweight produces is too small, cannot reach effect stretching for straight wave guide silk; When the weight of counterweight is greater than 1.5kg, the pulling force that counterweight produces is excessive, causes straight wave guide silk easily broken in subsequent manufacturing processes.
The present invention adopts tension mounting means set wave seal wire, and waveguide filament is in tensioning state in waveguide always, is conducive to the flexibility reducing waveguide filament, eliminates the Bending Deformation of waveguide filament, improve the linearity of waveguide filament, keeps waveguide filament straight.The present invention selects the counterweight of 1.5kg to carry out tension to waveguide filament and installs.In the present invention, waveguide filament is in the middle of waveguide and does not need external unit to support snap ring, be conducive to reducing product structure part to the decay of distorting stress intensity of wave, thus the requirement reduced signal demodulator circuit, make circuit design simpler, like this, both decrease material cost, also shorten the production debugging time, improve measuring accuracy and the functional reliability of product.
Accompanying drawing explanation
Fig. 1 is magnetostrictive displacement sensor principle of work schematic diagram;
Fig. 2 is one embodiment of the invention magnetostrictive displacement sensor one-piece construction schematic diagram;
Fig. 3 is magnetostrictive displacement sensor cross-sectional view embodiment illustrated in fig. 2;
Fig. 4 is the measuring staff cross-sectional view of magnetostrictive displacement sensor embodiment illustrated in fig. 2;
Fig. 5 is the waveguide cross-sectional view of magnetostrictive displacement sensor embodiment illustrated in fig. 2.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
A kind of magnetostrictive displacement sensor, comprise position magnet ring 1, measuring staff 2, electronics storehouse 3 and occur that joint 4(is see Fig. 2, Fig. 3), measuring staff 2 comprises outer tube end face capping 2-1, outer tube 2-2 and plastic insulation covering 2-3(is see Fig. 4), waveguide 2-4 is located at rear end in plastic insulation covering 2-3, outer tube 2-2 is located at outside plastic insulation covering 2-3, outer tube end face capping 2-1 is located at the end of waveguide 2-4 and outer tube 2-2, waveguide 2-4 comprises waveguide filament 2-41, waveguide filament 2-41 is located in fiberglass pipe 2-45, high temperature wire 2-46 is provided with outside fiberglass pipe 2-45, fiberglass pipe 2-45 is placed in inner sleeve 2-47 together with high temperature wire 2-46, waveguide filament 2-41 rear end is provided with rear end damping 2-44, damping 2-44 in rear end is fixed by rear end plug 2-43, waveguide filament 2-41 and high temperature wire 2-46 is welded on the tubular rivet 2-42 of rear end (pad is as shown in A in Fig. 5).Waveguide filament 2-41 front end is provided with front end damping 2-48, and damping 2-48 in front end is fixed by front end plug 2-49, and waveguide filament 2-41 is fixed on front end on the tubular rivet 2-410 of front end (pad is as shown in B in Fig. 5).
Described waveguide filament 2-41 front end is provided with front glue shell 2-411, front glue shell 2-411 is located at outside inner sleeve 2-47, front glue shell 2-411 one end is provided with support 2-412, support is connected with front glue shell 2-411 by screw by one end of support 2-412, the other end is welded and fixed the front end of waveguide filament 2-41 by front end tubular rivet 2-410, waveguide filament 2-41 is made to be in the centre of inner sleeve 2-47, and by nickel sheet, waveguide filament 2-41 is connected to the circuit board of magnetostrictive displacement sensor near the position of front glue shell 2-411 at support 2-412, support 2-412 is located at outside front end damping 2-48.
A kind of tension installation method of waveguide filament of magnetostrictive displacement sensor as previously mentioned: put into inner sleeve 2-47 after waveguide filament 2-41 rear end puts fiberglass pipe 2-45 together with high temperature wire 2-46, then successively through rear end damping 2-44 and rear end plug 2-43, then waveguide filament 2-41 and higher temperature line 2-46 is welded on the tubular rivet 2-42 of rear end; Waveguide filament 2-41 front end is successively through front glue shell 2-411, support 2-412, front end damping 2-48, front end plug 2-49, again inner sleeve 2-47 is fixed, then at waveguide filament 2-41 front end suspention counterweight, make waveguide filament 2-41 be in tension in inner sleeve 2-47, finally waveguide filament 2-41 is welded on the tubular rivet 2-410 of front end.
The weight of described counterweight is 1.5kg.Learn through experiment test, when the weight of counterweight is less than 1.5kg, the pulling force that counterweight produces is too small, cannot reach effect stretching for waveguide filament; When the weight of counterweight is greater than 1.5kg, the pulling force that counterweight produces is excessive, causes straight wave guide silk easily broken in subsequent manufacturing processes.
Claims (4)
1. a magnetostrictive displacement sensor, it comprises position magnet ring, measuring staff, there is joint and electronics storehouse, it is characterized in that, measuring staff comprises the capping of outer tube end face, outer tube and plastic insulation, waveguide rear end is located in plastic insulation covering, outer tube is located at outside plastic insulation covering, the end of waveguide and outer tube is located in the capping of outer tube end face, waveguide comprises waveguide filament, waveguide filament is located in fiberglass pipe, high temperature wire is provided with outside fiberglass pipe, fiberglass pipe is placed in inner sleeve together with high temperature wire, waveguide filament rear end is provided with rear end damping, rear end damping is fixed by rear end plug, waveguide filament and high temperature wire are fixed on the tubular rivet of rear end, waveguide filament front end is provided with front end damping, front end damping is fixed by front end plug, waveguide filament front end is fixed on the tubular rivet of front end.
2. magnetostrictive displacement sensor according to claim 1, it is characterized in that, described waveguide filament front end is provided with front glue shell, front glue shell is located at outside inner sleeve, front glue shell one end is provided with support, support is connected with front glue shell by screw by one end of support, the other end is welded and fixed the front end of waveguide filament by front end tubular rivet, waveguide filament is in the centre of inner sleeve, by nickel sheet, waveguide filament is connected to the circuit board of magnetostrictive displacement sensor at support near the position of front glue shell, props up and be set up in outside the damping of front end.
3. the tension installation method of the waveguide filament of magnetostrictive displacement sensor as claimed in claim 1 or 2, it is characterized in that, after comprising the steps: that waveguide filament rear end is put fiberglass pipe, inner sleeve is put into together with high temperature wire, then successively through rear end damping and rear end plug, then waveguide filament and higher temperature line are welded on the tubular rivet of rear end; Waveguide filament front end is successively through front glue shell, support, front end damping, front end plug, again inner sleeve is fixed, then at waveguide filament front end suspention counterweight, make waveguide filament be in tension in inner sleeve, finally waveguide filament is welded on the tubular rivet of front end.
4. the tension installation method of waveguide filament according to claim 3, it is characterized in that, the weight of described counterweight is 1.5kg.
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| CN107941186A (en) * | 2017-12-13 | 2018-04-20 | 山信软件股份有限公司 | A kind of displacement sensing system |
| CN108594311A (en) * | 2018-06-11 | 2018-09-28 | 中国石油天然气集团公司 | A kind of harmonic source detection device and method based on magnetostriction cable |
| CN108955816B (en) * | 2018-09-28 | 2024-05-14 | 优必得石油设备(苏州)有限公司 | Tension stabilizing device for probe waveguide wire |
| CN109870389A (en) * | 2019-04-12 | 2019-06-11 | 长春工程学院 | Based on magnetostrictive displacement sensor irrigation water coefficient of viscosity detection device and method |
| CN110411328A (en) * | 2019-08-13 | 2019-11-05 | 上海交通大学 | Magnetostrictive displacement sensor |
| CN110375632B (en) * | 2019-08-23 | 2020-10-16 | 河北工业大学 | Magnetostrictive displacement sensor suitable for large temperature range/high temperature environment |
| CN111103200A (en) * | 2019-12-05 | 2020-05-05 | 太原理工大学 | Real-time loading heating leaching test device in CT scanning process |
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Effective date of registration: 20230417 Address after: Room 101, Entrepreneurship Center, Hunan Environmental Protection Technology Industrial Park, No. 199 Zhenhua Road, Yuhua District, Changsha City, Hunan Province, 410014 Patentee after: FIRSTRATE SENSOR CO.,LTD. Address before: No. 52 Xiangzhang Road, Yuhua District, Changsha City, Hunan Province, 410014 Patentee before: HUNAN YUHANG TECHNOLOGY Co.,Ltd. |
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