CN105571477A - Magnetic core component of linear displacement sensor - Google Patents
Magnetic core component of linear displacement sensor Download PDFInfo
- Publication number
- CN105571477A CN105571477A CN201610144729.5A CN201610144729A CN105571477A CN 105571477 A CN105571477 A CN 105571477A CN 201610144729 A CN201610144729 A CN 201610144729A CN 105571477 A CN105571477 A CN 105571477A
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- CN
- China
- Prior art keywords
- protecting pipe
- magnetic core
- linear movement
- movement pick
- connecting rod
- 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.)
- Pending
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F3/00—Cores, Yokes, or armatures
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
The invention relates to a sensor used for measuring linear displacement and is applied to the field of aerospace, and particularly relates to a magnetic core component of a linear displacement sensor. The magnetic core is a smooth cylinder of which the two ends have no connecting holes. The magnetic core is externally provided with a sheath tube. Flexible buffer material is arranged between the magnetic core and the sheath tube. Glue is poured into small gaps between the flexible buffer material and the internal wall of the sheath tube by a vacuum glue pouring mode, and excess glue on the surface is removed by using a grinding mode after glue is cured so that processing difficulty of the magnetic core of the linear displacement sensor can be reduced and production cost can be reduced finally; consistency and impact resisting capacity of the linear displacement sensor can be enhanced, and mean free error time, reliability and system safety can be increased; and disassembling, maintenance and repairing of an aerospace vehicle caused by the linear displacement sensor can be reduced.
Description
Technical field
The present invention relates to a kind of sensor for measuring straight-line displacement being applied to aerospace field, being specifically related to a kind of core assembly of linear movement pick-up.
Background technology
At aerospace field, dismounting, the maintenance of parts are very numerous and diverse, difficult, expensive.So harsher to the consistance of product, reliability requirement, compared to the product for civilian use, industrial products, mean free error time also will be grown many, and various environmental experiment requires also strict many, and in impact experiment, the peak accelerator of harsh grade reaches 500-1000m/s
2.
Substantially, linear movement pick-up comprises two primary clusterings: mover assembly, stator assembly; Namely mover assembly is the movable part of linear movement pick-up, is generally mounted on the part of certain rectilinear movement, mover assembly is made up of carriage release lever, one or more core assembly; Namely stator assembly is the fixed part of linear movement pick-up, and be generally mounted on certain pedestal, stator assembly has the parts such as shell, coil block, cable, the position at mover assembly place can be changed into electric signal and export to external circuit.
As shown in Figure 1: substantially, the common core assembly of non-this patent is assembled and is rigidly connected formed by connecting rod, magnetic core, plug; Under normal circumstances, there is connecting hole at the two ends of magnetic core, are convenient to be connected with connecting rod, plug and fix.
Generally, the coil block inside of stator assembly includes a primary coil and two secondary coils, by inputting a driving voltage exchanged to primary coil, so latter two secondary coil can export induced voltage respectively, by two secondary coil differential concatenations, then can export a differential voltage.
Generally, line level sensor is the magnetic circuit reluctance change being changed coil block by the change of magnetic core displacement, first two secondary coil mutual induction amount changes in coil block are caused, then the output induced voltage of two secondary coils is caused to change, finally the differential voltage change exported, the output differential voltage change of usual linear movement pick-up and the linear relation of displacement of magnetic core.
In theory, the position of magnetic core is in the middle position of coil block, i.e. zero-bit place, the mutual induction amount of two secondary coils is identical, and namely the output induced voltage of two secondary coils is identical, and corresponding differential output voltage is zero.
If the connecting hole size at magnetic core two ends is inconsistent, then can cause: the mutual induction amount of two secondary coils in zero-bit place is not identical, so the output induced voltage of latter two secondary coil is not identical yet, now differential output voltage and non-vanishing, this voltage is zero-bit offset voltage, due to the existence of zero-bit offset voltage, finally cause linear movement pick-up in the precise decreasing at zero-bit place.
If wish that zero-bit offset voltage is less, then magnetic core must have very high consistance, be in particular in: the diameter of all magnetic core two ends connecting hole, the degree of depth all require unanimously, and there is very strict size tolerance requirements, bring very large difficulty to the machining of magnetic core, add the core production manufacturing cost of linear movement pick-up simultaneously for this.
Substantially, the Material selec-tion of magnetic core is very crucial, generally be chosen as permalloy, cobalt-base alloys, non-crystaline amorphous metal, ingot iron, ferrite etc., and known most of magnetic material magnetic property after running into impact, collision there will be irreversible change, the precision of final effect string displacement transducer, the even reduction of hydraulic performance decline, reliability and security of system.
Substantially, a loose and environment that resistance is less is needed between the core assembly of linear movement pick-up and coil block, be convenient to mover assembly and do straight-line displacement campaign relative to stator assembly, due to the existence of machining precision and rigging error, core assembly inevitably produces friction with coil block in moving process, and long-term friction can cause the magnetic core in core assembly to wear and tear, final also can the precision of effect string displacement transducer, and cause the reduction of hydraulic performance decline, reliability and security of system.
The present invention mainly deals with problems from the angle analysis of the core assembly of linear movement pick-up.
Summary of the invention
One aspect of the present invention, be a cylinder by Magnetic Core Design, two ends do not have connecting hole, this design reduces the difficulty of processing of magnetic core, decrease the production cost of magnetic core, most importantly: by improving the consistance of magnetic core, and then improve the consistance of all linear movement pick-ups.
Another aspect of the present invention, increases a protecting pipe outward at magnetic core, and after long-term use, what be worn can be only protecting pipe, and is not core body, and this design adds mean free error time and the life-span of linear movement pick-up.
Another aspect of the present invention, increases flexible buffer material between magnetic core and protecting pipe, re-uses glue and fills fixing, carry out apparatus with shock absorbing with this, reduces to impact, collide direct impact on magnetic core, improves the ability of linear movement pick-up shock resistance, collision.
The technical solution adopted for the present invention to solve the technical problems is: select suitable nonmagnetic substance, be processed into connecting rod, connecting rod has the Step Shaft that length, diameter are appropriate; Select suitable magnetic material, be processed into cylindrical magnetic core, length, the diameter of magnetic core are appropriate, again by flexible buffer material suitable for magnetic core surface mount after thermal treatment; Select suitable nonmagnetic substance, be processed into plug, length, the diameter of plug are appropriate; Select suitable nonmagnetic substance tubing, the diameter of tubing is appropriate, is processed into protecting pipe, and the length of protecting pipe is appropriate, then bores one or more fabrication hole in the position that protecting pipe outer wall is appropriate; First the Step Shaft of connecting rod is filled in the left side of protecting pipe, then be welded and fixed; Then the magnetic core being pasted with flexible buffer material is filled in protecting pipe from right side; Again plug is filled in the right side of protecting pipe, then be welded and fixed; By the fabrication hole on protecting pipe, by the mode of vacuum glue pouring, glue is poured into the fine gap of flexible buffer material and protecting pipe inwall, treat that glue curing uses grinding method later, remove excess surface glue, make the surface aesthetic of core assembly, reduce surfaceness simultaneously.
The invention has the beneficial effects as follows: by orderly production, the assembling of each parts, the final magnetic core difficulty of processing reducing linear movement pick-up, reduces production cost; Improve the consistance of linear movement pick-up; Improve the impact resistance of linear movement pick-up; Increase the mean free error time of linear movement pick-up; Increase reliability and the security of system of linear movement pick-up; The dismounting of the aerospace vehicle that minimizing causes due to linear movement pick-up, maintenance, repair.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the common core assembly explosive view of non-this patent.
Fig. 2 is two remaining linear movement pick-up structural drawing.
Fig. 3 is the mover assembly structural drawing of two remaining linear movement pick-up.
Fig. 4 is the core assembly explosive view using this patent.
Fig. 5 is the core assembly structural drawing using this patent.
Fig. 6 is the partial enlarged drawing based on Fig. 5.
Fig. 7 is single remaining linear movement pick-up structural drawing.
Fig. 8 is four remaining linear movement pick-up structural drawing.
Any possible when, same reference numerals will be used in all figure to indicate same or analogous parts.
Label declaration.
1. connecting rod.
External thread on 1a. connecting rod.
Step Shaft on 1b. connecting rod.
2. magnetic core.
3. plug.
4. protecting pipe.
Fabrication hole on 4a. protecting pipe.
The weld of 4b. protecting pipe and connecting rod.
The weld of 4c. protecting pipe and plug.
5. flexible buffer material.
6. glue.
10. core assembly.
20. carriage release levers.
The core assembly of 11. single remaining linear movement pick-ups.
The carriage release lever of 21. single remaining linear movement pick-ups.
The core assembly of 12. 4 remaining linear movement pick-ups.
The carriage release lever of 22. 4 remaining linear movement pick-ups.
The mover assembly of 100. pairs of remaining linear movement pick-ups.
The stator assembly of 200. pairs of remaining linear movement pick-ups.
The mover assembly of 101. single remaining linear movement pick-ups.
The stator assembly of 201. single remaining linear movement pick-ups.
The mover assembly of 102. four remaining linear movement pick-ups.
The stator assembly of 202. four remaining linear movement pick-ups.
Embodiment
As shown in Figure 2: in one embodiment, two remaining linear movement pick-up is made up of the mover assembly (100) of a two remaining linear movement pick-up and the stator assembly (200) of a two remaining linear movement pick-up.
As shown in Figure 3: the mover assembly (100) of two remaining linear movement pick-up is assemblied by two core assemblies (10) and a carriage release lever (20); Concrete method is: the external thread (1a) on connecting rod is fitted on carriage release lever (20), then circumference soldering is fixed (welding manner includes but not limited to: Laser Welding (LBW), EBW (electron beam welding), argon arc welding).
As shown in Figure 4: get suitable nonmagnetic substance (suitable nonmagnetic substance includes but not limited to: stainless steel, titanium alloy, copper, aluminium), be processed into the connecting rod (1) that length, diameter are appropriate, the left end of connecting rod (1) is the external thread (1a) on connecting rod, and the right-hand member of connecting rod (1) is the Step Shaft (1b) on connecting rod.
As shown in Figure 4: (suitable magnetic material includes but not limited to: permalloy to get suitable magnetic material, cobalt-base alloys, non-crystaline amorphous metal, ingot iron, ferrite) be processed into length, the magnetic core (2) that diameter is appropriate, re-use grinding method, the diameter of magnetic core (2) is processed into a point-device size, then destressing thermal treatment, finally by the flexible buffer material (5) of magnetic core (2) surface mount suitable material, (the flexible buffer material of suitable material includes but not limited to: Kapton Tape, polyvinyl fluoride heat-shrink tube, fluororubber heat-shrink tube).
As shown in Figure 4: get suitable nonmagnetic substance (suitable nonmagnetic substance includes but not limited to: stainless steel, titanium alloy, copper, aluminium), the plug (3) that length, diameter are appropriate is processed into.
As shown in Figure 4: get suitable nonmagnetic substance (suitable nonmagnetic substance includes but not limited to: stainless steel, titanium alloy, copper, aluminium) tubing, the diameter of tubing is appropriate, be processed into the appropriate protecting pipe of length (4), bore the fabrication hole (4a) on one or more protecting pipe in the position that protecting pipe (4) outer wall is appropriate.
As shown in Figure 5: by connecting rod (1) and protecting pipe (4) assembling; Concrete method is: the left side Step Shaft (1b) on connecting rod being filled in protecting pipe (4), fixes (welding manner includes but not limited to: Laser Welding (LBW), EBW (electron beam welding), argon arc welding) at weld (4b) circumference soldering of protecting pipe and connecting rod.
As shown in Figure 5: by magnetic core (2) and protecting pipe (4) assembling; Concrete method is: filled in from the right side of protecting pipe (4) by the magnetic core (2) of sticking flexible padded coaming (5).
As shown in Figure 5: by plug (3) and protecting pipe (4) assembling; Concrete method is: filled on the right side of plug (3) from protecting pipe (4), fixes (welding manner includes but not limited to: Laser Welding (LBW), EBW (electron beam welding), argon arc welding) at weld (4c) circumference soldering of protecting pipe and plug.
As shown in Figure 6: now there is one deck flexible buffer material (5) on the surface of magnetic core (2), but still there is tiny gap between flexible buffer material (5) and protecting pipe (4), if there is no filling material, magnetic core (2) is in a unsure state, magnetic core (2) can do tiny rocking in protecting pipe (4), finally can have an impact to the precision of linear movement pick-up; In order to eliminate this impact, need by the fabrication hole (4a) on protecting pipe, use the mode of vacuum glue pouring, by the glue (6) (glue of suitable material includes but not limited to: epoxy resin, silica gel, polyurethane) of suitable material by this tiny gap filling, treat that magnetic core (2), protecting pipe (4), flexible buffer material (5) are namely in the state of being rigidly connected later in glue (6) solidification.
As shown in Figure 5: now connecting rod (1), plug (3), protecting pipe (4) surface because weld stay crator, encapsulating residual glue, a lot of harmful effect is produced to the quality of linear movement pick-up; First: had a strong impact on the presentation quality of linear movement pick-up; Secondly: the surfaceness of core assembly (10) is larger, in use, the mover assembly (100) of two remaining linear movement pick-up is caused to slide difficult relative to the stator assembly (200) of two remaining linear movement pick-up, friction increases, the precision of final effect string displacement transducer and serviceable life; In order to eliminate this impact, need to use grinding method, the crator on the core assembly (10) of two remaining linear movement pick-up surface, the residual whole grinding of glue is clean, this operation reduces the surfaceness of core assembly (10) to a great extent, allow the mover assembly (100) of the two remaining linear movement pick-up of line relative to the stator assembly (200) of two remaining linear movement pick-up slip easily, non-resistance, final serviceable life of improving linear movement pick-up.
Now the present embodiment completes, pass through the present embodiment, core assembly (10) all parts are all rigidly connected, fixing, and magnetic core (2) is by protecting pipe (4), flexible buffer material (5), glue (6) protection; Protecting pipe (4), as outermost rigid material, can be resisted certain impulsive force and indeformable, bending, can bear friction, wearing and tearing simultaneously for a long time, play the effect protecting magnetic core (2); Flexible buffer material (5) is as flexible material, and the impulsive force that protecting pipe (4) can be subject to absorbs, decomposition; Protecting pipe (2) can be connected with flexible buffer material (5) by glue (6), fixing, also can play the effect of absorptions, decomposition impulsive force simultaneously.
As shown in Figure 7: in another embodiment, single remaining linear movement pick-up needs the mover assembly (101) of a single remaining linear movement pick-up and the stator assembly (201) of a single remaining linear movement pick-up; Wherein, the mover assembly (101) of single remaining linear movement pick-up comprises the carriage release lever (21) of a single remaining linear movement pick-up and the core assembly (11) of a single remaining linear movement pick-up.
As shown in Figure 8: In yet another embodiment, four remaining linear movement pick-ups need the mover assembly (102) of four remaining linear movement pick-ups and the stator assembly (202) of four remaining linear movement pick-ups; Wherein, the mover assembly (102) of four remaining linear movement pick-ups comprises the carriage release lever (22) of four remaining linear movement pick-ups and the core assembly (12) of four four remaining linear movement pick-ups.
Claims (9)
1. the core assembly of a linear movement pick-up, by connecting rod (1), magnetic core (2), plug (3), protecting pipe (4), flexible buffer material (5), glue (6) is processed in order, assembly, it is characterized in that: there is protecting pipe (4) on the right side of connecting rod (1), connecting rod (1) and protecting pipe (4) are welded and fixed, there is magnetic core (2) protecting pipe (4) inside, there is plug (3) on the right side of protecting pipe (4), protecting pipe (4) and plug (3) are welded and fixed, magnetic core (2) external pasting has flexible buffer material (5), the gap filling glue (6) of flexible buffer material (5) and protecting pipe (4), whole core assembly (10) grinding is bright and clean.
2. the core assembly of a kind of linear movement pick-up according to claim 1, it is characterized in that: connecting rod (1) is processed by suitable nonmagnetic substance, all sizes are all appropriate, and the left end of connecting rod (1) has the external thread (1a) on connecting rod; The right-hand member of connecting rod (1) has the Step Shaft (1b) on connecting rod.
3. the core assembly of a kind of linear movement pick-up according to claim 1, is characterized in that: magnetic core (2) is processed by suitable magnetic material, and shape is right cylinder, and all sizes are all appropriate; After magnetic core (2) roughing becomes right cylinder, be finish-machined to point-device size by grinding method; Magnetic core (2) after finishing needs through destressing thermal treatment.
4. the core assembly of a kind of linear movement pick-up according to claim 1, is characterized in that: plug (3) is processed by suitable nonmagnetic substance, and all sizes are all appropriate.
5. the core assembly of a kind of linear movement pick-up according to claim 1, is characterized in that: protecting pipe (4) is formed by suitable nonmagnetic substance tubular object extruding, and all sizes are all appropriate; There is the fabrication hole (4a) on one or more protecting pipe the appropriate position of outer wall of protecting pipe (4).
6. the core assembly of a kind of linear movement pick-up according to claim 1, is characterized in that: the material of flexible buffer material (5) is appropriate, needs to be pasted onto on magnetic core (2) face of cylinder.
7. the core assembly of a kind of linear movement pick-up according to claim 1, it is characterized in that: the Step Shaft (1b) on connecting rod fills in the left side of protecting pipe (4), be then welded and fixed at the weld (4b) of protecting pipe and connecting rod; The inside of protecting pipe (4) filled in by the magnetic core (2) of sticking flexible padded coaming (5); Plug (3) fills in the right side of protecting pipe (4), is then welded and fixed at the weld (4c) of protecting pipe and plug.
8. the core assembly of a kind of linear movement pick-up according to claim 1, it is characterized in that: the magnetic core (2) of sticking flexible padded coaming (5) and the inwall fine gap of protecting pipe (4), need by the fabrication hole (4a) on protecting pipe, adopt vacuum glue pouring mode to be filled by glue (6) full.
9. the core assembly of a kind of linear movement pick-up according to claim 1, it is characterized in that: the crator that core assembly (10) has welding to stay, the residual glue of encapsulating, outside surface unsightly and coarse, need to be cleaned out by grinding method, obtain a bright and clean and appearance that roughness is lower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610144729.5A CN105571477A (en) | 2016-03-15 | 2016-03-15 | Magnetic core component of linear displacement sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610144729.5A CN105571477A (en) | 2016-03-15 | 2016-03-15 | Magnetic core component of linear displacement sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105571477A true CN105571477A (en) | 2016-05-11 |
Family
ID=55881885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610144729.5A Pending CN105571477A (en) | 2016-03-15 | 2016-03-15 | Magnetic core component of linear displacement sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105571477A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114396863A (en) * | 2022-01-24 | 2022-04-26 | 厦门乃尔电子有限公司 | Wide-range dual-redundancy linear displacement sensor |
| CN114440813A (en) * | 2022-02-07 | 2022-05-06 | 厦门乃尔电子有限公司 | Rotor structure of series dual-redundancy linear displacement sensor and adjusting method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3513408A (en) * | 1968-08-01 | 1970-05-19 | Tri Metrics | Displacement transducer oscillator with movable tapered magnetic core |
| JP2002090106A (en) * | 2000-09-18 | 2002-03-27 | Nippon Soken Inc | Differential transformer type displacement sensor |
| CN102012491A (en) * | 2010-11-22 | 2011-04-13 | 西北工业大学 | Single core flux gate and flux gate double-shaft sensor |
| CN202102872U (en) * | 2011-06-02 | 2012-01-04 | 河南森源电气股份有限公司 | Annular iron core protection structure for cast mutual inductor |
| CN203615885U (en) * | 2013-12-10 | 2014-05-28 | 中国航空工业第六一八研究所 | Mover structure of long-stroke linear displacement sensor |
| CN203895256U (en) * | 2014-06-26 | 2014-10-22 | 山东泰开电力电器有限公司 | Novel cast current transformer iron core buffer device |
| CN205537489U (en) * | 2016-03-15 | 2016-08-31 | 北京星空建腾电子科技有限公司 | Linear displacement sensor's magnetic core subassembly |
-
2016
- 2016-03-15 CN CN201610144729.5A patent/CN105571477A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3513408A (en) * | 1968-08-01 | 1970-05-19 | Tri Metrics | Displacement transducer oscillator with movable tapered magnetic core |
| JP2002090106A (en) * | 2000-09-18 | 2002-03-27 | Nippon Soken Inc | Differential transformer type displacement sensor |
| CN102012491A (en) * | 2010-11-22 | 2011-04-13 | 西北工业大学 | Single core flux gate and flux gate double-shaft sensor |
| CN202102872U (en) * | 2011-06-02 | 2012-01-04 | 河南森源电气股份有限公司 | Annular iron core protection structure for cast mutual inductor |
| CN203615885U (en) * | 2013-12-10 | 2014-05-28 | 中国航空工业第六一八研究所 | Mover structure of long-stroke linear displacement sensor |
| CN203895256U (en) * | 2014-06-26 | 2014-10-22 | 山东泰开电力电器有限公司 | Novel cast current transformer iron core buffer device |
| CN205537489U (en) * | 2016-03-15 | 2016-08-31 | 北京星空建腾电子科技有限公司 | Linear displacement sensor's magnetic core subassembly |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114396863A (en) * | 2022-01-24 | 2022-04-26 | 厦门乃尔电子有限公司 | Wide-range dual-redundancy linear displacement sensor |
| CN114440813A (en) * | 2022-02-07 | 2022-05-06 | 厦门乃尔电子有限公司 | Rotor structure of series dual-redundancy linear displacement sensor and adjusting method thereof |
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Application publication date: 20160511 |