CN201247067Y - Magnetic-sensitive sensor - Google Patents
Magnetic-sensitive sensor Download PDFInfo
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- CN201247067Y CN201247067Y CNU2008200408468U CN200820040846U CN201247067Y CN 201247067 Y CN201247067 Y CN 201247067Y CN U2008200408468 U CNU2008200408468 U CN U2008200408468U CN 200820040846 U CN200820040846 U CN 200820040846U CN 201247067 Y CN201247067 Y CN 201247067Y
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Abstract
The utility model relates to a magneto-sensitive sensor, which comprises an integral skeleton, a sensitive wire, a coil, an embedding component and an outer shell, wherein the integral skeleton comprises a core frame and lead wires, wherein the lead wires are fixed on the core frame, an axial slot which is threaded through a middle axial body is arranged on the core frame, the sensitive wire is placed in the slot, two ends of the coil are respectively connected with two lead wires on the integral skeleton, the outer shell is wrapped outside the integral skeleton and the coil, the embedding component is infused in a gap between the integral skeleton and the outer shell through encapsulating materials, since the slot type structure is adopted, a through slot structure is not adopted, thereby the manufacture difficulty of the core frame is lowered, which is beneficial for mass production, the skeleton is manufactured into a whole, two ends of the coil are directly connected with the lead wires, the sensor structure is simplified, the structure of the sensor is more compact, the volume of the sensor is reduced, and the reliability of the sensor is improved.
Description
Technical field
The utility model relates to a kind of magneto-dependent sensor.
Background technology
The formation of general zero power consumptive magneto-dependent sensor comprises responsive silk, coil, skeleton, outer lead etc., and from the sensor construction that prior art is seen, it is cylindric how skeleton is made with plastics.The right cylinder axial centre is provided with a through hole, and responsive silk is embedded in the through hole.Coil is wrapped in the right cylinder periphery by fine enamelled wire and forms, and the enameled wire two ends are connected with outer lead by a transition printed board.In addition, disclosed a kind of sensor in Chinese patent LZ03226193.4, its structure is comparatively complicated, various parts need be through repeatedly assembling, this sensor also is provided with two magnet rings in the coil both sides simultaneously, its objective is in order to assemble and to strengthen external magnetic field, play the effect that improves the sensor output amplitude, but manufacturing process more complicated and volume are bigger.
Mainly have the following disadvantages in the prior art: (1) leaves enough winding spaces in order to give the skeleton periphery, generally requires the skeleton axis body to be designed to thin as far as possible and grows, and for example diameter is no more than 1.2mm; Simultaneously, in order to make responsive silk enough big magnetoelectricity conversion efficiency is arranged, the length-diameter ratio of responsive silk requires to be about 30～50 usually.If responsive filament diameter is 0.3mm, longly be 10mm, then be equivalent on the skeleton of diameter 1.2mm, a long 10mm, to open the through hole of the about 0.35mm of an internal diameter, long 10mm, and the skeleton two ends also to be provided with washer, this difficulty on technology is quite big.In the actual production,, often need to increase the skeleton volume, just increase sensor bulk in order to solve the perforate problem.(2) each part need be through repeatedly assembling, and production efficiency is low, poor reliability.
Summary of the invention
Goal of the invention: the purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of simple in structure, magneto-dependent sensor that volume is little, easily manufactured is provided.
Technical scheme: a kind of magneto-dependent sensor, it comprises monoblock type skeleton, responsive silk, coil, embedding part, shell, the monoblock type skeleton comprises core frame and lead-in wire, lead-in wire is fixed on the core frame, have an axial pass trough that connects the intermediate shaft body on the core frame, responsive silk is placed in the groove, and coil links to each other with lead-in wire two ends on the monoblock type skeleton, shell is wrapped in monoblock type skeleton, coil outside, and the embedding part is poured in the slit between monoblock type skeleton and the shell by Embedding Material and forms.
Described responsive silk is a magnetic bi-stable alloy wire, and responsive silk is fixed in the groove with insulating varnish.
The core frame of described monoblock type skeleton is that xsect is rectangle, square or circular I shape frame, and groove is positioned on the central axis of middle axis body of core frame of monoblock type skeleton.
Wire bonds or injection moulding are fixed on the both ends or one end of the core frame of monoblock type skeleton, and the coil two ends are welded on respectively on two lead-in wires.
Do not need to use power supply during working sensor, it can convert magnetic signal to electric signal as a small generator, can be media with magnetic field also, converts mechanical energy to electric energy.But it is again different with generator magnetoelectricity transfer principle and characteristics.Generator utilizes the coil winding cutting magnetic line to generate electromotive force, and the induced electromotive force size is relevant with the rotating speed of rotating magnetic field, and for obtaining useful electromotive force, high speed rotating is wanted in magnetic field; And this magneto-dependent sensor is to utilize in the sensor responsive silk direction of magnetization instant reverse, generates electromotive force in coil.Whether whether responsive silk direction of magnetization overturns, only relevant greater than responsive silk shell remanent magnetism with externally-applied magnetic field intensity, and irrelevant with changes of magnetic field speed, so this magneto-dependent sensor can detect the magnetic field of extremely low pace of change.
Beneficial effect: (1) because the core frame adopts groove formula structure, rather than use through-hole type, thereby has reduced the difficulty of processing of core frame, helps batch process.(2) because core frame and lead-in wire are beforehand with formula skeleton in aggregates, and directly the coil two ends are connected with outer lead, have removed transition printing edition, so just simplified sensor construction, make sensor construction compact more, reduce sensor bulk, improved sensor reliability.
Description of drawings
Fig. 1 is the cut-open view of the utility model embodiment one.
Fig. 2 is the front view of the monoblock type skeleton among Fig. 1.
Fig. 3 is the left view of Fig. 2.
Fig. 4 is the cut-open view of the utility model embodiment two.
Fig. 5 is the front view of the monoblock type skeleton among Fig. 3.
Fig. 6 is the upward view of Fig. 5.
The utility model will be further described with reference to the accompanying drawings and in conjunction with the embodiments.
As shown in Figure 1, the magneto-dependent sensor of embodiment one comprises: monoblock type skeleton 1, responsive silk 2, coil 3, embedding part 4, shell 5.Shown in Fig. 2,3, monoblock type skeleton 1 comprises I-shaped core frame of flat and lead-in wire, the core frame of monoblock type skeleton 1 is made one with ceramic casting technique, prefabricated ceramal pad on the core frame two ends, lead-in wire is zinc-plated phosphor-bronze wire, also can use copper core plastics flexible cord as required, two lead-in wires are welded on respectively on two pads.Have a groove that runs through axis body in the middle of the core frame on the axis body, be used to place responsive silk 2.Responsive silk 2 is made by magnetic bi-stable alloy wire, filament length 10mm, and diameter 0.3mm has magnetoelectricity conversion performance preferably.Responsive silk 2 usefulness insulating varnishes are fixed on the groove that is arranged on the middle axis body center line of core frame.Coil 3 usefulness diameters are that the enameled wire coiling of 0.03mm forms, totally 6000 circles.The enameled wire two ends are welded on respectively on two pads of core frame, are connected with two lead-in wires.Embedding part 4 is formed by the embedding of Embedding Material epoxy resin, and shell 5 usefulness high-temperature engineering plastics are injection molded.Embedding part 4 and shell 5 protect magneto-dependent sensor core body and solder joint fully, avoid sensor corrosion to occur in using, break, fall fault such as lead-in wire.
Under the magneto-dependent sensor of present embodiment triggered in 5mT (milli tesla) magnetic field, the output voltage pulse amplitude reached 4 volts, about 20～30 μ S of pulsewidth, DC internal resistance 900～1000 Ω, sensor bulk is little, and the reliability height, is suitable for using under humidity, corrosive atmosphere.
As shown in Figure 4, the magneto-dependent sensor of embodiment two comprises: monoblock type skeleton 1, responsive silk 2, coil 3, embedding part 4, shell 5.Shown in Fig. 5,6, monoblock type skeleton 1 comprises that xsect is circular I-shaped core frame and lead-in wire, the core frame is made one with Shooting Technique and core frame, lead-in wire is zinc-plated phosphor-bronze wire, two lead-in wires directly are fixed on an end of core frame when injection moulding, have a groove that runs through axis body on the middle axis body of core frame, be used to place responsive silk 2.Responsive silk 2 is made by magnetic bi-stable alloy wire, filament length 10mm, and diameter 0.3mm has magnetoelectricity conversion performance preferably.Responsive silk 2 usefulness insulating varnishes are fixed in the groove of middle axis body of core frame.Coil 3 usefulness diameters are that the enameled wire coiling of 0.03mm forms, totally 5000 circles, and coil 3 two ends are welded on respectively on the roots of two lead-in wires.Embedding part 4 is formed by the epoxy resin embedding, and shell 5 usefulness aluminium alloy sheets are stamped to form.Embedding part 4 and shell 5 protect sensor core and solder joint fully, avoid sensor corrosion to occur in using, break, fall fault such as lead-in wire.
Under the present embodiment sensor triggered in 5mT (milli tesla) magnetic field, the output voltage pulse amplitude reached 4 volts, about 20～30 μ S of pulsewidth, and DC internal resistance 800～900 Ω, sensor bulk is little, and the reliability height, is suitable for using under hot environment.
The utility model provides a kind of thinking and method of magneto-dependent sensor; the method and the approach of this technical scheme of specific implementation are a lot; the above only is a preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle, can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.The all available prior art of each component part not clear and definite in the present embodiment is realized.
Claims (7)
1, a kind of magneto-dependent sensor, it is characterized in that: it comprises monoblock type skeleton (1), responsive silk (2), coil (3), embedding part (4), shell (5), monoblock type skeleton (1) comprises core frame and lead-in wire, lead-in wire is fixed on the core frame, have the axial pass trough of a perforation intermediate shaft body on the core frame, responsive silk (2) is placed in the groove, coil (3) two ends respectively with monoblock type skeleton (1) on two the lead-in wire link to each other, shell (5) is wrapped in monoblock type skeleton (1), coil (3) outside, embedding part (4) are poured in the slit between monoblock type skeleton (1) and the shell (5) by Embedding Material and form.
2, magneto-dependent sensor according to claim 1 is characterized in that: described responsive silk (2) is a magnetic bi-stable alloy wire.
3, magneto-dependent sensor according to claim 1 and 2 is characterized in that: responsive silk (2) is fixed in the groove with insulating varnish.
4, magneto-dependent sensor according to claim 1 is characterized in that: the core frame of described monoblock type skeleton (1) is that xsect is rectangle, square or circular I shape frame.
5, magneto-dependent sensor according to claim 1 is characterized in that: groove is positioned on the central axis of middle axis body of core frame of monoblock type skeleton (1).
6, magneto-dependent sensor according to claim 1 is characterized in that: wire bonds or injection moulding are fixed on the both ends or one end of the core frame of monoblock type skeleton (1), and coil (3) two ends are welded on respectively on two lead-in wires.
7, magneto-dependent sensor according to claim 6 is characterized in that: coil (3) is by pad and wire bonds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200408468U CN201247067Y (en) | 2008-07-29 | 2008-07-29 | Magnetic-sensitive sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200408468U CN201247067Y (en) | 2008-07-29 | 2008-07-29 | Magnetic-sensitive sensor |
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| Publication Number | Publication Date |
|---|---|
| CN201247067Y true CN201247067Y (en) | 2009-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200408468U Expired - Fee Related CN201247067Y (en) | 2008-07-29 | 2008-07-29 | Magnetic-sensitive sensor |
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| CN (1) | CN201247067Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101975591A (en) * | 2010-09-27 | 2011-02-16 | 上海交通大学 | Integrated magnetic elasticity sensor |
| CN102306329A (en) * | 2011-05-27 | 2012-01-04 | 南京艾驰电子科技有限公司 | Passive sensor and sensing method thereof |
-
2008
- 2008-07-29 CN CNU2008200408468U patent/CN201247067Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101975591A (en) * | 2010-09-27 | 2011-02-16 | 上海交通大学 | Integrated magnetic elasticity sensor |
| CN102306329A (en) * | 2011-05-27 | 2012-01-04 | 南京艾驰电子科技有限公司 | Passive sensor and sensing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090527 Termination date: 20120729 |