CN106199041A - Non-chip-shaped inductance type revolution speed measuring is popped one's head in - Google Patents
Non-chip-shaped inductance type revolution speed measuring is popped one's head in Download PDFInfo
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- CN106199041A CN106199041A CN201510226988.8A CN201510226988A CN106199041A CN 106199041 A CN106199041 A CN 106199041A CN 201510226988 A CN201510226988 A CN 201510226988A CN 106199041 A CN106199041 A CN 106199041A
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Abstract
The one non-chip-shaped inductance type revolution speed measuring probe that the present invention proposes, is filled, in combining including a shape iron core and armature thereof and be placed in metal circular shell, the sensing assembly that thing is fixing.Door shape iron core iron core footmuff enters two non-circular cylindrical magnetic plug assembly (11), coil block is that circle copper enamel-covered wire curl is around in the window of non-circular cylindrical hollow insulation framework, and coil periphery forms independent sensing assembly equipped with the radiation-resistant glass layer (10) containing lead metal and radiotolerant polysulfones implant；Two lead-in wires of two coils constituting inductance series winding are welded in 2 feet of electric connector socket, 3rd foot of socket (1) is unsettled, the iron core end face of sensing assembly is close to shell inner face, in testing, the number of times that the most tested rotor of number of times that the armature upper surface of survey sensing end face (4) and armature combination (5) is mutually met rotates is revolution.The present invention solves the problem that rotary shaft larger vibration causes rotor sensitive surface to contact with each other with probe body sensitive surface.
Description
Technical field
The present invention is about being mainly used in rotating the inductance type tachometric survey probe that object rotating speed advance data revolution measures, scope of particularly measuring is 30r/min～3000r/min rotating speed, and probe body sensitive surface is about 4mm with armature sensitive surface maximum spacing, the non-chip-shaped probe that can use in the environment having certain neutron irradiation intensity.
Background technology
Feature and the advantages such as inductance type transducer is simple and reliable for structure with it, resolution is high, the highest to environmental requirement, output is relatively big, capacity of resisting disturbance is strong, it is usually used in measuring the non electrical quantities such as displacement, pressure, flow, vibration, the long-distance transmissions of information can be realized, record, show and control, be widely used in industrial automation control system in scientific research, industrial detection.But there is exchange zero signal, be unsuitable for high frequency kinetic measurement, its sensitivity, the linearity and measurement scope mutually restrict；The response of sensor own frequency is low, is not suitable for quick kinetic measurement.Inductance type transducer is generally speaking divided into three major types, and one is the self-inductance sensor utilizing self-inductance, and two is the differential transformer transducer according to mutual inductance principle, and three is the eddy current sensor utilizing vortex principle.The principle of inductance type revolution speed sensing is similar with the principle of magnetoelectric tachometric transducer.It is all to constitute by coil, iron core, Magnet, or be directly integrated as magnetosensitive tachometric survey chip.Electromagnetic induction principle is all used to realize testing the speed.Tested mechanical quantity, such as displacement, pressure etc. are converted to inductance or voltage signal.Its non-sensitive part is exactly the inductance component with variable magnetic induction.For accomplishing to measure function, mostly use changing the flow of QI-blood gap type structure, using air gap as operating variable, changed by working gas gap, the magnetic resistance causing magnetic circuit changes, so that the inductance of inductance component changes, so they belong to variable reluctance (or claiming space-changeable type) sensor.
In prior art, domestic existing many products, but it mainly uses chip-shaped, generator principle type (cutting magnetic line generation induced potential) or transformer principle type.The measuring probe of chip-shaped sensor, does not the most consider the impact of neutron irradiation, applies in the environment of neutron irradiation highly difficult.Using chip-shaped revolution speed measuring probe such as integrated signal modulate circuit and △-Σ type a/d converter, also mistor makees sensing element, is not suitable for the place that neutron irradiation is more serious.Then two types, the voltage analog amplitude of output frequency and output is all affected by rotating speed, some products are for improving product susceptiveness, and working gas gap is designed to less, rotor sensitive surface can be caused to contact with each other with probe body sensitive surface because of the larger vibration of rotary shaft.And present invention probe, though still belonging to space-changeable type inductance sensor, but it only takes air gap infinity and set a distance two states, and tested rotating speed only affects body and armature meet number of times, i.e. rotating speed only affects frequency.And each equidistant meet does not interferes with the size of body maximum induction amount between body and armature, rotating speed size only affects the time length that maximum induction amount exists, and this probe can bear more serious neutron irradiation, and, measuring distance, up to about 4mm, the most not yet finds similar products.
Summary of the invention
It is an object of the invention to the weak point existed for prior art.There is provided a kind of and there is the life-span long without wear out failure, the non-chip-shaped inductance type revolution speed measuring probe of more serious neutron irradiation, long-distance transmission can be born.
The purpose of the present invention can be reached by following measures.A kind of non-chip-shaped inductance type revolution speed measuring probe, the door shape iron core 12 being made including a soft magnetic materials and armature combination 5 thereof, outer face is by as the sensing shell of end face 4 of probe body be placed in metal circular shell 2, and it is filled the sensing assembly that thing is fixing, it is characterized in that: door shape iron core 12 iron core footmuff enters two non-circular cylindrical magnetic plug assemblies 11, coil block 11 circle copper enamel-covered wire is around in the window of non-circular cylindrical hollow insulation framework 14 in the shape of a spiral, coil periphery forms independent sensing assembly equipped with the radiation-resistant glass layer 10 containing lead metal and radiotolerant polysulfones implant；Two lead-in wires 7 of two coils constituting inductance series winding are welded in 1 foot and 2 feet of electric connector socket 1,3rd foot of socket 1 is unsettled, the iron core end face of sensing assembly is close to shell 2 inner face, in testing, the number of times that the most tested rotor of number of times that the armature upper surface 6 of survey sensing end face 4 and armature combination 5 is mutually met rotates, namely revolution.
The present invention has the effect that compared to prior art
1. the present invention surveys the revolution of the secondary rotor can tested in (30～3000) r/min rotating speed that sensing end face 4 is mutually met with the armature upper surface 6 of armature combination 5, rotor sensitive surface and probe body sensitive surface distance are up to about 4mm, so, rotor sensitive surface would not be caused to contact with each other with probe body sensitive surface because of the larger vibration of rotary shaft；
2. chipless class components and parts in probe, are amenable to the irradiation of the rays such as relatively persistent erection of the penis.The rectangle armature 16 that soft magnetic materials is made, can improve resolution when armature 16 is met with probe body 3.The present invention tested rotating speed of popping one's head in only affects probe body and armature meet number of times, i.e. rotating speed only affect frequency.And each equidistant meet does not interferes with the size of probe body maximum induction amount between probe body and armature, rotating speed size only affects the time length that maximum induction amount exists.And this probe can bear more serious neutron irradiation；
3. coil periphery is equipped with the screen layer containing lead metal and radiotolerant polysulfones implant, and therefore coil is amenable to the irradiation of the rays such as relatively persistent erection of the penis.Polysulfones radiation hardness filler 9 can reduce the ray such as γ and neutron to the injury of sensing assembly etc. the fastness of strengthening sensing assembly fixed position；
4. this probe signal can long-distance transmission without distortion.Coil block 11 of the present invention circle copper enamel-covered wire is around in the window of non-circular cylindrical hollow insulation framework 14 in the shape of a spiral, in the cable 100m length that probe is accessed bifilar shielding twisted wire, the significant change of probe body inductance will not be caused, it is ensured that long-distance transmission undistorted；
5. the life-span is long.Coil block 11 of the present invention circle copper enamel-covered wire is around in the window of non-circular cylindrical hollow insulation framework 14 in the shape of a spiral, and coil periphery forms independent sensing assembly equipped with the radiation-resistant glass layer 10 containing lead metal and radiotolerant polysulfones implant；Two lead-in wires 7 of two coils constituting inductance series winding are welded in 1 foot and 2 feet of electric connector socket 1, and the 3rd foot of socket 1 is unsettled, and the iron core end face of sensing assembly is close to shell 2 inner face, belong to non-contact type work series products, without wear out failure.
The present invention uses non-chip-shaped inductance type revolution speed measuring probe to evade the weakness of some other probe, it is achieved that the non-chip-shaped inductance type revolution speed measuring probe that can use in the environment having certain neutron irradiation intensity.
Accompanying drawing explanation
Fig. 1 is the appearance schematic diagram of the present invention non-chip-shaped inductance type revolution speed measuring probe.
Fig. 2 is the structure cutaway view of Fig. 1.
Fig. 3 is the structure chart of Fig. 2 sensing assembly.
Fig. 4 is Fig. 2 coil block organigram.
Fig. 5 is the sectional view of Fig. 2 iron core 12.
Fig. 6 is the ultimate principle figure of the present invention.
In figure: 1. socket, 2. shell, 3. probe body, 4. probe body sensing end face, 5. armature combination, 6. armature upper surface, 7. lead-in wire, 8. installs version, 9. radiation hardness filler, 10. radiation-resistant glass, 11. coil blocks, 12. iron cores, 13. tapered end holding screws, 14. skeletons, 15. armature seats, 16 armature, 17 magnetic lines of force.
Detailed description of the invention
Further illustrate the present invention below in conjunction with the accompanying drawings with embodiment, but the most therefore limit the present invention among described scope of embodiments.
Refering to Fig. 1, Fig. 2.Non-chip-shaped inductance type revolution speed measuring is popped one's head in, the door shape iron core 12 being made including a soft magnetic materials and armature combination 5 thereof, and it is made up of probe body 3 and an armature combination 5.Armature combination 5 is made up of Fig. 4 armature 16 and armature seat 15, and the armature 16 of strip is spot-welded together with armature seat 15.Armature is made by soft magnetic materials.Probe body sensitive surface and armature sensitive surface maximum spacing are less than 4mm.Armature seat is made by the rustless steel without magnetic conductivity；Armature combination is installed, is fixed on rotor use by the stud on armature seat.Magnetic plug assembly 11 is wound in insulation framework 14 by circle copper enamel-covered wire and is formed.For improving resolution when armature 16 and probe body 3 are met, the opening of two feet of door shape iron core 12, all it is shaped with the section of stretching out of small stair.Probe body 3 has the circular housing 2 of an orthohexagonal ring flange having S=21, by the sensing assembly being made up of radiation-resistant glass 10, coil block 11, iron core 12 etc. in its head.It is pushed against the inner surface of shell 2 end by tapered end holding screw 13 and polysulfones radiation hardness filler 9.The installing plate 8 being welded in shell, acts the effect supporting tapered end holding screw 13.After two lead-in wires 7 of sensing assembly weld with two contact pins of socket 1 respectively, socket 1 is connected together with shell 2 seal weld；And armature combination 5 by an armature seat 15 and thickness be 2.6mm-3mm, the armature 16 of long 10mm-11mm, a width of 5mm welds together and forms.Probe body can be fixed on tested rotor as rotating object as fixed body, armature.In view of in test, for preventing probe body from colliding with armature, design armature upper surface can be about 4mm with the spacing distance of probe body.
Probe body it can be when electric current flows through its internal coil, stable inductance can be produced, and the inductance of about 5mH can be had when its sensing end face 4 is with armature upper surface 4mm apart, and can tell number of times when armature 16 is met with probe body 3 exactly when armature rotates in fixed axis with 30r/min～3000r/min rotating speed.
Probe body it by a socket 1, with hexagon ring flange cylinder blanket 2, install version 13, magnetosensitive inductive component being fixed on shell inner cylinder of 8, tapered end holding screw form.Magnetic susceptibility assembly is made a shape iron core 12 by the magnetic conductor of a soft magnetism and is inserted in two non-circular cylindrical helical coil blocks 11 of iron core foot respectively, and the radiation-resistance mask 10 of coil block periphery and radiation hardness filler 9 form.Two coil blocks are connected by going between, and form two coil series windings, then are connected with socket by other end lead-in wire 7 extraction.Coil block is mainly made up of a skeleton, a coil and corresponding two lead-in wires.After coil is passed through electric current, magnetic field can be produced around coil, have the iron core of magnetic conductor, the magnetic induction in this magnetic field can be made to increase.The sensing assembly end face 4 of this probe body 3 combine with armature in armature upper surface 6, the two is set a distance when geo-stationary and is similar to be parallel to each other, and therefore, during whole meet, inductance amplitude is similar to horizontal linear.When the two carries out relative rotary motion, armature enters in the coverage of probe body magnetic field, and probe body coil inductance becomes big, otherwise, the inductance of probe body coil diminishes.Probe body coil inductance becomes number of times big, that diminish, determines the meet number of times of sensing end face and armature, thus reaches the purpose of System of Rotating about Fixed Axis object revolution speed measuring.Owing to probe body undertakes signal output function, so, probe body is more suitable as fixed body, and armature can be fixed on tested rotor as rotating object.In view of in test, for preventing probe body from colliding with armature, design armature upper surface can be about 4mm with the spacing distance of probe body.
Remove outside six square flange dishes, remaining is cylindric, profile active section external diameter can be 14.5mm, connection screw thread is M18 × 1, and outlet section external diameter is 19mm, and remaining is cylindrical outer shape active section, connection screw thread is fine thread, outlet section external diameter determines according to user interface, and it can suitably change profile diameter according to the thickness of radiation-resistant glass, it is simple to processing.Meanwhile, it is close with domestic proximity transducer shape of product, it is simple to domestic component sharing, reduces manufacturing cost.In figure, sensing assembly is one of core of product, its sensing assembly end face against the outer surface of bottom surface be the measuring point of probe body and armature mounting distance, be also and induction point that armature is met.Fig. 3 is shown in by sensing assembly primary structure.It is fixed on the door shape iron core 12 of soft magnetic materials by coil block 11 glue, and coil block 11 is that circle copper enamel-covered wire curl is around in the window of non-circular cylindrical hollow insulation framework 14, such as Fig. 4.Each one bar lead-in wire 7 of two coils welds together, and makes the inductance of two coils form series winding.The remaining other end two lead-in wire 7 extraction, standby；The radiation-resistant glass layer 10 made with metal stereotype wraps coil block outer surface, sticks with glue agent and works temporarily and clung by screen layer interface, forms independent sensing assembly.Being loaded by sensing assembly in shell 2, iron core end face pushes against the inner surface of probe body sensing end face.Filling is filled out radiation hardness filler 9 and is fixed by sensing assembly.Spare lead wire 7 is passed installing plate 8, installing plate is put into shell 2, with laser, installing plate is welded together with outer casing inner wall；Pushing against iron core 12 with tapered end holding screw 13, screw fixed by glue.Lead-in wire 4 and standby two lead-in wires 7 are welded on the corresponding pin of socket 1.Weld together melting sealed with the outer surface of shell 2 for the outer surface of socket 1 appropriate section.Product completes.
As shown in Figure 6, the ultimate principle of the present invention is: when coil in electric current flowing through coil assembly 11, can produce magnetic field around coil, and the magnetic resistance of soft magnet core 12 is minimum, form optimal magnetic circuit, representing optimal magnetic circuit with the magnetic line of force 17, coil passes through iron core, enters armature 16 magnet being made by soft magnetic materials through air-gap (working gas gap), it is then passed through air-gap, enter the iron core of coil outer rim, overlap with magnetic line of force starting point, form magnetic line of force Guan Bi.Air-gap therein is working gas gap.When working gas gap changes, the inductance of coil will change: when armature 16 is close to the end face 4 of probe body, and the inductance of coil becomes big, otherwise, diminish.According to this rule, by the number of times that test coil inductance is either large or small, it is known that armature 16 and the meet number of times of probe body 3 end face 4.Accordingly, it is made the present invention.
Claims (10)
1. a non-chip-shaped inductance type revolution speed measuring probe, door shape iron core (12) being made including a soft magnetic materials and armature combination (5) thereof, outer face is by the shell of the sensing end face (4) as probe body with in being placed in metal circular shell (2), and it is filled the sensing assembly that thing is fixing, it is characterized in that: door shape iron core (12) iron core footmuff enters two non-circular cylindrical magnetic plug assembly (11), coil block (11) circle copper enamel-covered wire is around in the window of non-circular cylindrical hollow insulation framework (14) in the shape of a spiral, coil periphery forms independent sensing assembly equipped with the radiation-resistant glass layer (10) containing lead metal and radiotolerant polysulfones implant；Two lead-in wires (7) of two coils constituting inductance series winding are welded in 1 foot and 2 feet of electric connector socket (1), 3rd foot of socket (1) is unsettled, the iron core end face of sensing assembly is close to shell (2) inner face, in testing, survey sensing end face (4) number of times that the mutual the most tested rotor of number of times met rotates with the armature upper surface (6) of armature combination (5), namely revolution.
Non-chip-shaped inductance type revolution speed measuring the most according to claim 1 is popped one's head in, it is characterised in that armature combination (5) is made up of armature (16) and armature seat (15), and the armature (16) of strip is spot-welded together with armature seat (15).
Non-chip-shaped inductance type revolution speed measuring the most according to claim 1 is popped one's head in, it is characterised in that the opening of two feet of door shape iron core (12) is all shaped with the section of stretching out of small stair.
Non-chip-shaped inductance type revolution speed measuring the most according to claim 1 is popped one's head in, it is characterised in that probe body (3) is pushed against the inner surface of shell (2) end by tapered end holding screw (13) and polysulfones radiation hardness filler (9).
Non-chip-shaped inductance type revolution speed measuring the most according to claim 1 is popped one's head in, it is characterized in that, magnetic susceptibility assembly is made a shape iron core (12) by the magnetic conductor of a soft magnetism and is inserted in two non-circular cylindrical helical coil blocks (11) of iron core foot respectively, and the radiation-resistance mask (10) of coil block periphery and radiation hardness filler (9) form.
Non-chip-shaped inductance type revolution speed measuring the most according to claim 1 is popped one's head in, it is characterized in that, sensing assembly end face (4) and the armature upper surface (6) in armature combination, the two is set a distance when geo-stationary and is similar to be parallel to each other；When the two carries out relative rotary motion, armature enters in the coverage of probe body magnetic field, and probe body coil inductance becomes big, otherwise, the inductance of probe body coil diminishes, and probe body coil inductance becomes number of times big, that diminish, determines the meet number of times of sensing end face and armature.
Non-chip-shaped inductance type revolution speed measuring the most according to claim 1 is popped one's head in, it is characterized in that, coil passes through iron core, enters armature (16) magnet being made by soft magnetic materials through air-gap, being then passed through air-gap and enter the iron core of coil outer rim, overlap formation magnetic line of force Guan Bi with magnetic line of force starting point.
Non-chip-shaped inductance type revolution speed measuring the most according to claim 1 is popped one's head in, it is characterised in that probe body, is fixed on tested rotor as rotating object as fixed body, armature, and armature upper surface is 3mm-4mm with the spacing distance of probe body.
Non-chip-shaped inductance type revolution speed measuring the most according to claim 1 is popped one's head in, it is characterised in that probe body sensitive surface and armature sensitive surface maximum spacing are less than 4mm.
Non-chip-shaped inductance type revolution speed measuring the most according to claim 1 is popped one's head in, it is characterised in that sensing assembly end face against the outer surface of bottom surface be probe body and the measuring point of armature mounting distance and the induction point met with armature.
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| CN201510226988.8A CN106199041A (en) | 2015-05-06 | 2015-05-06 | Non-chip-shaped inductance type revolution speed measuring is popped one's head in |
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| CN201510226988.8A CN106199041A (en) | 2015-05-06 | 2015-05-06 | Non-chip-shaped inductance type revolution speed measuring is popped one's head in |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110045424A (en) * | 2019-04-23 | 2019-07-23 | 重庆石墨烯研究院有限公司 | A kind of graphene proximity sensor |
| CN111829575A (en) * | 2019-04-18 | 2020-10-27 | 南京库尔卡传感科技有限公司 | Speed and temperature integrated sensor |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101421628A (en) * | 2006-05-05 | 2009-04-29 | 威伯科有限公司 | Inductive sensor |
| CN201672930U (en) * | 2010-05-04 | 2010-12-15 | 成都凯天电子股份有限公司 | Small inductance type circular sensor with safe strength at installation parts |
| US20110260713A1 (en) * | 2008-10-30 | 2011-10-27 | Mathias Schleyer | Impulse transmitter and method for producing same |
| CN202025014U (en) * | 2011-04-15 | 2011-11-02 | 桂林电器科学研究院 | Monitoring device for steel belt carrier roller operation of slobbering machine |
| CN103839655A (en) * | 2012-11-26 | 2014-06-04 | 徐秧年 | Inductance module |
| CN104567951A (en) * | 2015-01-27 | 2015-04-29 | 成都凯天电子股份有限公司 | Dual-redundancy inductance type proximity sensor |
-
2015
- 2015-05-06 CN CN201510226988.8A patent/CN106199041A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101421628A (en) * | 2006-05-05 | 2009-04-29 | 威伯科有限公司 | Inductive sensor |
| US20110260713A1 (en) * | 2008-10-30 | 2011-10-27 | Mathias Schleyer | Impulse transmitter and method for producing same |
| CN201672930U (en) * | 2010-05-04 | 2010-12-15 | 成都凯天电子股份有限公司 | Small inductance type circular sensor with safe strength at installation parts |
| CN202025014U (en) * | 2011-04-15 | 2011-11-02 | 桂林电器科学研究院 | Monitoring device for steel belt carrier roller operation of slobbering machine |
| CN103839655A (en) * | 2012-11-26 | 2014-06-04 | 徐秧年 | Inductance module |
| CN104567951A (en) * | 2015-01-27 | 2015-04-29 | 成都凯天电子股份有限公司 | Dual-redundancy inductance type proximity sensor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111829575A (en) * | 2019-04-18 | 2020-10-27 | 南京库尔卡传感科技有限公司 | Speed and temperature integrated sensor |
| CN110045424A (en) * | 2019-04-23 | 2019-07-23 | 重庆石墨烯研究院有限公司 | A kind of graphene proximity sensor |
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