CN103486958A - Magnetostrictive displacement sensor and tensioning mounting method of waveguide wire thereof - Google Patents
Magnetostrictive displacement sensor and tensioning mounting method of waveguide wire thereof Download PDFInfo
- Publication number
- CN103486958A CN103486958A CN201310459160.8A CN201310459160A CN103486958A CN 103486958 A CN103486958 A CN 103486958A CN 201310459160 A CN201310459160 A CN 201310459160A CN 103486958 A CN103486958 A CN 103486958A
- Authority
- CN
- China
- Prior art keywords
- waveguide
- waveguide filament
- rear end
- pipe
- filament
- 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
Links
Images
Landscapes
- Transmission And Conversion Of Sensor Element Output (AREA)
- Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
Abstract
The invention provides a magnetostrictive displacement sensor and a tensioning mounting method of a waveguide wire thereof. The sensor comprises a position magnetic ring, a measuring rod, a wire outlet connector and an electronic bin, wherein the measuring rod comprises an outer sleeve pipe end face sealing cover, an outer sleeve pipe and a plastic insulation sleeve, the rear end of a waveguide pipe is arranged in the plastic insulation sleeve, the outer sleeve pipe is arranged outside the plastic insulation sleeve, the outer sleeve pipe end face sealing cover is arranged on the end portion of the waveguide pipe and the end portion of the outer sleeve pipe, the waveguide pipe comprises a waveguide wire which is arranged in a glass fiber pipe, a high-temperature lead is arranged outside the glass fiber pipe, the glass fiber pipe and the high-temperature lead are arranged in an inner sleeve pipe, the waveguide wire and the high-temperature lead are fixed at a rear end hollow rivet, and the front end of the waveguide wire is fixed on a front end hollow rivet. The invention further provides the tensioning mounting method of the waveguide wire. The waveguide wire in the waveguide pipe is in a tensioned state all the time, the bending degree is small, the straight degree is high, a clamping ring does not need to be supported by an external device, attenuation of torsional stress wave strength is small, product debugging time is short, measuring precision is high, and work is reliable.
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 come measuring position exactly by a distorting stress wave pulse signal of the crossing generation of two different magnetic fields.Measuring sensor is a waveguide, and the waveguide filament in waveguide is to be made by special magnetostriction materials.Measuring process is by generation current pulse in the electronics storehouse of sensor, this current impulse is transmitted in waveguide filament, thereby produce a circumference magnetic field outside waveguide filament, when this magnetic field with when being enclosed within on waveguide magnetic field that the position magnet ring as change in location produces and intersecting, due to magnetostrictive effect, can produce a distorting stress wave pulse signal in waveguide filament, the speed of sound transmission of this distorting stress wave pulse signal to fix, and by the electronics storehouse, detected very soon.Transmission time due to this distorting stress wave pulse signal in waveguide filament and position magnet ring are directly proportional to the distance between the electronics storehouse, 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, when this material is magnetized in magnetic field, can elongate or shorten along direction of magnetization, and this phenomenon is called magneto-striction phenomenon.The generation of this phenomenon is because spontaneous magnetization occurs below Curie point for ferromagnetic or ferrimagnetic material, 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 the direction of magnetization of each magnetic domain and externally-applied magnetic field direction are reached unanimity, and 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 be consistent with the surface level measurement index of degree of material.
Magnetostrictive displacement sensor mainly is comprised of measuring staff, electronics storehouse and the non-contacting position magnet ring that is enclosed within on measuring staff.During work, the electronics storehouse of sensor sends a current excitation pulse g to the waveguide filament loop, forms toroidal magnetic field a around the waveguide filament d of this pulse meeting in waveguide h.When the magnetic field c that this toroidal magnetic field a and position magnet ring b produce meets, produce the Widemanm effect on waveguide filament d, form distorting stress ripple e (as shown in Figure 1).The distorting stress ripple is transmitted back in the electronics storehouse and is detected device f along waveguide filament from the position at magnet ring place, position with the speed of about 2800m/s and records.Record the mistiming that driving pulse and detector arrangement receive signal, the velocity of propagation in conjunction with the distorting stress ripple in waveguide filament, can determine the distance between position magnet ring and reference point.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 the user provides in real time, continuous, reliable, accurate straight-line displacement is measured.
The core component waveguide filament of magnetostrictive displacement sensor, its flatness directly affects the measuring accuracy of sensor.The waste caused in order to reduce transportation cost and to reduce the production feeding, waveguide filament is all to adopt one whole packaged form that is rolled into multi-turn to be transported, but the internal stress produced after volume makes waveguide wire exist certain flexibility, thereby has affected 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 waveguide filament is held up, and keeps extended configuration.There is following defect in it: use and support the fixing waveguide filament of snap ring, its flatness is poor; Owing to supporting snap ring, with waveguide filament, directly contact, so support the part distorting stress ripple that snap ring meeting absorbing waveguides silk produces, the stress wave intensity has decayed, thereby the requirement to the signal demodulator circuit is higher, make circuit design more complicated, the requirement that software is processed is higher, has strengthened production difficulty; , in vibration environment, can there be the shake of certain frequency in product between support member and waveguide filament, measuring accuracy can reduce, the product reliability variation.
Summary of the invention
The technical problem to be solved in the present invention is, overcome the above-mentioned defect that prior art exists, a kind of waveguide filament flatness that is conducive to improve is provided, is conducive to reduce the magnetostrictive displacement sensor based on the waveguide filament tension mode that Bending Deformation that waveguide filament produces under Action of Gravity Field and measuring accuracy are high and the tension installation method of waveguide filament thereof.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of magnetostrictive displacement sensor, comprise the position magnet ring, measuring staff, joint and electronics storehouse appear, measuring staff comprises the capping of outer tube end face, outer tube and plastic insulation, the waveguide rear end is located in plastic insulation covering, outer tube is located at the plastic insulation covering outside, 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, the fiberglass pipe outside is provided with high temperature wire, fiberglass pipe is placed in inner sleeve together with high temperature wire, the waveguide filament rear end is provided with the rear end damping, the rear end damping is fixed by the rear end plug, waveguide filament and high temperature wire are fixed on the tubular rivet of rear end.The waveguide filament front end is provided with the front end damping, and the front end damping is fixed by the front end plug, and the waveguide filament front end is fixed on the front end tubular rivet.
Further, described waveguide filament front end is provided with front glue shell, front glue shell is located at the inner sleeve outside, front glue shell one end is provided with support, one end of support is connected support by screw with front glue shell, the other end is welded and fixed the front end of waveguide filament by the front end tubular rivet, the centre of waveguide filament in inner sleeve, position at the close front glue shell of support is connected to waveguide filament by the nickel sheet circuit board of magnetostrictive displacement sensor, props up and is set up in the front end damping outside.
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 the waveguide filament rear end together with high temperature wire, then pass successively rear end damping and rear end plug, then waveguide filament and higher temperature line are welded on the tubular rivet of rear end; The 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 in inner sleeve in tension, finally waveguide filament is welded on the front end tubular rivet.
Further, the weight of described counterweight is preferably 1.5kg.
Through experiment test, learn, when the weight of counterweight is less than 1.5kg, the pulling force that counterweight produces is too small, can't reach the effect stretching the straight wave guide silk; When the weight of counterweight is greater than 1.5kg, the pulling force that counterweight produces is excessive, causes the straight wave guide silk easily broken in follow-up manufacture craft.
The present invention adopts tension mounting means set wave seal wire, and waveguide filament always in tensioning state, is conducive to reduce the flexibility of waveguide filament in waveguide, eliminates the Bending Deformation of waveguide filament, improves the linearity of waveguide filament, keeps waveguide filament straight.The present invention selects the counterweight of 1.5kg to strain installation to waveguide filament.In the present invention, waveguide filament is in the middle of waveguide and do not need external unit to support snap ring, be conducive to reduce the decay of product structure part to the distorting stress intensity of wave, thereby reduced the requirement to the signal demodulator circuit, make circuit design simpler, like this, both reduced material cost, also shorten the production debugging time, improved measuring accuracy and the functional reliability of product.
The 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;
The measuring staff cross-sectional view that Fig. 4 is magnetostrictive displacement sensor embodiment illustrated in fig. 2;
The waveguide cross-sectional view that Fig. 5 is 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 referring to 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(are referring to Fig. 4), waveguide 2-4 is located at rear end in plastic insulation covering 2-3, outer tube 2-2 is located at the plastic insulation covering 2-3 outside, 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, the fiberglass pipe 2-45 outside is provided with high temperature wire 2-46, 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 fixes by rear end plug 2-43, waveguide filament 2-41 and high temperature wire 2-46 are welded in rear end tubular rivet 2-43 upper (pad is as shown in A in Fig. 4).Waveguide filament 2-41 front end is provided with front end damping 2-48, and front end damping 2-48 fixes by front end plug 2-49, and waveguide filament 2-41 front end is fixed in front end tubular rivet 2-410 upper (pad is as shown in B in Fig. 4).
Described waveguide filament 2-41 front end is provided with front glue shell 2-411, front glue shell 2-411 is located at the inner sleeve 2-47 outside, front glue shell 2-411 mono-end is provided with support 2-412, the end of support 2-412 is connected support by screw with front glue shell 2-411, the other end is welded and fixed the front end of waveguide filament 2-41 by front end tubular rivet 2-410, make the centre of waveguide filament 2-41 in inner sleeve 2-47, and by the nickel sheet, waveguide filament 2-41 is connected to the circuit board of magnetostrictive displacement sensor in the position of the close front glue shell 2-411 of support 2-412, support 2-412 is located at the front end damping 2-48 outside.
A kind of tension installation method of waveguide filament of magnetostrictive displacement sensor as previously mentioned: inner sleeve 2-47 is put into after putting fiberglass pipe 2-45 in waveguide filament 2-41 rear end together with high temperature wire 2-46, then pass successively rear end damping 2-44 and rear end plug 2-43, then waveguide filament 2-41 and higher temperature line 2-46 are 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 in inner sleeve 2-47 in tension, finally waveguide filament 2-41 is welded on front end tubular rivet 2-410.
The weight of described counterweight is 1.5kg.Through experiment test, learn, when the weight of counterweight is less than 1.5kg, the pulling force that counterweight produces is too small, can't reach the effect stretching waveguide filament; When the weight of counterweight is greater than 1.5kg, the pulling force that counterweight produces is excessive, causes the straight wave guide silk easily broken in follow-up manufacture craft.
Claims (4)
1. a magnetostrictive displacement sensor, it comprises the position magnet ring, measuring staff, joint and electronics storehouse appear, it is characterized in that, measuring staff comprises the capping of outer tube end face, outer tube and plastic insulation, the waveguide rear end is located in plastic insulation covering, outer tube is located at the plastic insulation covering outside, 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, the fiberglass pipe outside is provided with high temperature wire, fiberglass pipe is placed in inner sleeve together with high temperature wire, the waveguide filament rear end is provided with the rear end damping, the rear end damping is fixed by the rear end plug, waveguide filament and high temperature wire are fixed on the tubular rivet of rear end, the waveguide filament front end is provided with the front end damping, the front end damping is fixed by the front end plug, the waveguide filament front end is fixed on the front end tubular rivet.
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 the inner sleeve outside, front glue shell one end is provided with support, one end of support is connected support by screw with front glue shell, the other end is welded and fixed the front end of waveguide filament by the front end tubular rivet, the centre of waveguide filament in inner sleeve, position at the close front glue shell of support is connected to waveguide filament by the nickel sheet circuit board of magnetostrictive displacement sensor, props up and is set up in the front end damping outside.
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: the waveguide filament rear end is put to fiberglass pipe, put into inner sleeve together with high temperature wire, then pass successively rear end damping and rear end plug, then waveguide filament and higher temperature line are welded on the tubular rivet of rear end; The 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 in inner sleeve in tension, finally waveguide filament is welded on the front end tubular rivet.
4. the tension installation method of waveguide filament according to claim 3, is characterized in that, the weight of described counterweight is 1.5kg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310459160.8A CN103486958B (en) | 2013-09-30 | 2013-09-30 | The tension installation method of a kind of magnetostrictive displacement sensor and waveguide filament thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310459160.8A CN103486958B (en) | 2013-09-30 | 2013-09-30 | The tension installation method of a kind of magnetostrictive displacement sensor and waveguide filament thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103486958A true CN103486958A (en) | 2014-01-01 |
| CN103486958B CN103486958B (en) | 2016-03-23 |
Family
ID=49827379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310459160.8A Active CN103486958B (en) | 2013-09-30 | 2013-09-30 | The tension installation method of a kind of magnetostrictive displacement sensor and waveguide filament thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103486958B (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105674866A (en) * | 2016-01-13 | 2016-06-15 | 南京南瑞集团公司 | Low deadband magnetostriction displacement sensor |
| 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 |
| CN108955816A (en) * | 2018-09-28 | 2018-12-07 | 优必得石油设备(苏州)有限公司 | A kind of pulling force stabilising arrangement on probe waveguide filament |
| CN109779612A (en) * | 2017-11-14 | 2019-05-21 | 中国石油化工股份有限公司 | A kind of carbon beam hoisting system underground pump dynagraoph test device and method |
| 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 |
| CN110375632A (en) * | 2019-08-23 | 2019-10-25 | 河北工业大学 | A kind of magnetostrictive displacement sensor suitable for big temperature range/hot environment |
| CN110411328A (en) * | 2019-08-13 | 2019-11-05 | 上海交通大学 | Magnetostrictive displacement sensor |
| 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 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1470853A (en) * | 2003-06-20 | 2004-01-28 | 天津大学 | Self-rating and temperature-drift-removable magnetostriction level sensor |
| CN201059954Y (en) * | 2007-07-10 | 2008-05-14 | 鞍山维盛机电有限公司 | Magnetic telescopic displacement sensor |
| US20100207612A1 (en) * | 2009-02-13 | 2010-08-19 | Asm Automation Sensorik Messtechnik Gmbh | Flat profile with mounting grooves |
| CN201688892U (en) * | 2010-04-22 | 2010-12-29 | 北京航天金泰星测技术有限公司 | Digital magnetostrictive liquid level sensor |
| CN203501971U (en) * | 2013-09-30 | 2014-03-26 | 湖南宇航科技有限公司 | Magnetostrictive displacement sensor based on waveguide wire tension manner |
-
2013
- 2013-09-30 CN CN201310459160.8A patent/CN103486958B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1470853A (en) * | 2003-06-20 | 2004-01-28 | 天津大学 | Self-rating and temperature-drift-removable magnetostriction level sensor |
| CN201059954Y (en) * | 2007-07-10 | 2008-05-14 | 鞍山维盛机电有限公司 | Magnetic telescopic displacement sensor |
| US20100207612A1 (en) * | 2009-02-13 | 2010-08-19 | Asm Automation Sensorik Messtechnik Gmbh | Flat profile with mounting grooves |
| CN201688892U (en) * | 2010-04-22 | 2010-12-29 | 北京航天金泰星测技术有限公司 | Digital magnetostrictive liquid level sensor |
| CN203501971U (en) * | 2013-09-30 | 2014-03-26 | 湖南宇航科技有限公司 | Magnetostrictive displacement sensor based on waveguide wire tension manner |
Non-Patent Citations (1)
| Title |
|---|
| 蒋洪等: "高精度快速刀具伺服系统中的超磁致伸缩致动器结构设计与控制研究", 《中国西部科技》 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105674866A (en) * | 2016-01-13 | 2016-06-15 | 南京南瑞集团公司 | Low deadband magnetostriction displacement sensor |
| CN109779612A (en) * | 2017-11-14 | 2019-05-21 | 中国石油化工股份有限公司 | A kind of carbon beam hoisting system underground pump dynagraoph test device and method |
| CN109779612B (en) * | 2017-11-14 | 2023-12-01 | 中国石油化工股份有限公司 | Downhole pump work diagram testing device and method for carbon rod lifting system |
| 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 |
| CN108955816A (en) * | 2018-09-28 | 2018-12-07 | 优必得石油设备(苏州)有限公司 | A kind of pulling force stabilising arrangement on probe waveguide filament |
| 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 |
| CN110375632A (en) * | 2019-08-23 | 2019-10-25 | 河北工业大学 | A kind of magnetostrictive displacement sensor suitable for big temperature range/hot 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103486958B (en) | 2016-03-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103486958B (en) | The tension installation method of a kind of magnetostrictive displacement sensor and waveguide filament thereof | |
| CN101504446B (en) | Thin film type structural magnetofluid-sonic surface wave integrated magnetic transducer | |
| KR100684691B1 (en) | Apparatus for generating and sensing torsional vibrations using magnetostriction, and method of generating and sensing torsional vibrations using the same | |
| CN101504445B (en) | Back-trough type structural magnetofluid-sonic surface wave integrated magnetic transducer | |
| US11209472B2 (en) | Fully distributed magnetic adsorption multi-parameter sensing cable | |
| CN201955128U (en) | Magnetostriction liquid level meter | |
| CN107843758A (en) | A kind of two die drawings cone fibre optic current sensor and preparation method | |
| CN106772133A (en) | A kind of space magnetic field sensor based on micro-nano fiber and preparation method thereof | |
| CN104101307A (en) | Fibre bragg grating reinforcement strain gauge capable of measuring temperature and strain simultaneously | |
| CN103760504B (en) | A kind of optical fiber Bragg raster space magnetic field intensity sensor based on giant magnetostrictive material and using method thereof | |
| CN201166698Y (en) | Detector for measuring pulse intense magnetic field | |
| CN105954362A (en) | Ultrasonic guided wave generator for rapid detection of pipeline | |
| CN203501971U (en) | Magnetostrictive displacement sensor based on waveguide wire tension manner | |
| CN109342789A (en) | A kind of all-fiber current sensor and preparation method thereof | |
| CN207081405U (en) | A kind of high-precision magneto strictive sensor | |
| CN205484407U (en) | Optic fibre bragg grating high frequency acceleration sensor | |
| CN207540633U (en) | A kind of liquid level detection device | |
| CN104849688B (en) | Pulsed E field measurement system signal injects scaling method | |
| CN108196208B (en) | Super magnetostriction magnetic field sensor based on novel miniature fiber bragg grating sensor | |
| CN103364054B (en) | A kind of signal follower method and device improving magnetic striction wave guide range hole | |
| CN203881409U (en) | Magnetostriction level gauge | |
| CN204008561U (en) | Guided wave sensor based on magnetostrictive effect | |
| CN203024724U (en) | Displacement detector | |
| CN102608380B (en) | Self-induced photoelectric mixed current transformer | |
| CN113267237B (en) | Magneto-electric composite material detection device of magnetostrictive liquid level meter |
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 | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
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. |