CN2526851Y - Nano-magnetic sensitive rotating speed sensor - Google Patents
Nano-magnetic sensitive rotating speed sensor Download PDFInfo
- Publication number
- CN2526851Y CN2526851Y CN 01239317 CN01239317U CN2526851Y CN 2526851 Y CN2526851 Y CN 2526851Y CN 01239317 CN01239317 CN 01239317 CN 01239317 U CN01239317 U CN 01239317U CN 2526851 Y CN2526851 Y CN 2526851Y
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- China
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- ratchet
- sensing unit
- axle
- axis
- permanent magnet
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Abstract
The utility model relates to a nano-magnetic sensitive rotating speed sensor which comprises a base 10, a socket 11, a pin-out 12, a permanent magnet 14, a magnetic sensitive part 131, a forme 130 and a shell 20, wherein the magnetic sensitive part 131 is a coil of which the core comprises nano-magnetic material; an integrated circuit which comprises an oscillation and magnifying shaping circuit and is connected with the coil is arranged on the forme 130. The utility model has the advantages of simple structure, low cost, high reliability, long service life, broad operating temperature range, good frequency response, etc. The utility model is suitable as a sensor for measuring the rotating speed of car engines, electric motors, steam turbine shafts. The utility model is a novel rotating speed sensor.
Description
The utility model relates to a kind of nanometer magnetosensitive speed probe, belongs to the technical field of magnetosensitive sensing and tachometry.
A kind of magnetosensitive speed probe is arranged in the background technology, contain base, socket, leading foot, magnetic position-sensing unit, housing, axis hole, magnet-wheel, axle, packing ring.Magnet-wheel is by the nonmagnetic substance manufacturing, has several (as 4 pairs) to be bumped into the cylindricality permanent magnet of wheel face in the mode that is distributed in wheel rim and runs through wheel face near wheel rim, or makes the garden dish with ferrite and magnetize and make magnet-wheel.Have axis hole on the housing.One end of axle is fixed together through the core of axis hole, packing ring and magnet-wheel, form to limit magnet-wheel and can only do the mechanism of pivoting with respect to housing.The magnetic position-sensing unit is installed on the base.Base and housing are fixed together, and form the mechanism that magnetic pole skims over the magnetic position-sensing unit when magnet-wheel rotates.But magnetic position-sensing unit Hall element, its Vcc, Vout are connected with three leading foots respectively with 0 end.During work, the axle and the rotating shaft to be measured of sensor link together, and the plug of counter inserts the socket of sensor, and the Vcc of this element, Vout and 0 end obtain the power supply from counter.Magnet-wheel rotates with rotating shaft to be measured, whenever rotates a circle 8 positive pulses of Vout end output.Counter shows the rotations per minute (rpm) of rotating shaft to be measured, i.e. rotating speed.The shortcoming of Hall magnetosensitive speed probe is: the thermal sensitivity of this element causes must comprising temperature-compensation circuit with the magnetoelectricity change-over circuit of this element coupling, has increased the complicacy of circuit; This element sensitivity is low, and the wheel face that requires magnet-wheel is as far as possible near this element, and part has wearing and tearing slightly in addition, can have influence on the operate as normal of sensor, the poor reliability of sensor, and the life-span is short.The magnetic position-sensing unit is tongue tube also, and two pins of this pipe are connected with two leading foots respectively as Vcc and Vout end.Dried at ordinary times spring disconnects.During work, magnet-wheel rotates with rotating shaft to be measured, whenever rotates a circle, closed 8 times of dried spring, 8 positive pulses of Vout end output.Counter shows the rpm of rotating shaft to be measured.The shortcoming of dried spring magnetosensitive speed probe is: the frequency response of dried spring is poor, easily produces mechanical fatigue, and the life-span is short, and remanent magnetism makes dried spring remain closed poor reliability in the time should disconnecting sometimes.
The purpose of this utility model is to release a kind of nanometer magnetosensitive speed probe that part is simple in structure, reliable in addition, frequency response is good and the life-span is long.
Fig. 1 is a structural representation of the present utility model.Fig. 2 is that the circuit of nanometer magneto-dependent sensor 13 of the present utility model connects block diagram, wherein, the magnetosensitive vibration is arranged on the printing forme 130 and amplify the shaping electricity slightly, magnetic position-sensing unit 131 and magnetosensitive oscillatory circuit are formed magnetic sensitive vibrator (see number of patent application for details be 99113797.3 Chinese invention patent application specification), the output terminal of this oscillator is connected to waveform amplifying circuit and shaping circuit commonly used, and this magnetosensitive vibration and amplification and rectification circuit now have been developed into special-purpose integrated circuit.Fig. 3 is the structural representation of a kind of modification of the utility model, and wherein ratchet 34 is different with the form of ratchet 33 combinations.Fig. 4 is the sectional view at A-A place among Fig. 3.Fig. 5 is the synoptic diagram of the another kind of structure of permanent magnet 14, and wherein permanent magnet 14 adopts horsehoe magnet, and two magnetic poles of this magnet are aimed at magnetosensitive sense part 131.
Existing accompanying drawings structure of the present utility model and operation principle.
Above-mentioned purpose is achieved by adopting high-sensitive nanometer magneto-dependent sensor and following array structure.A kind of nanometer magnetosensitive speed probe, contain base 10, socket 11, leading foot 12, permanent magnet 14, magnetic position-sensing unit 131, printing forme 130, housing 20, axis hole 21, axle 31, packing ring 32, ratchet 33, magnetic position-sensing unit 131 is coils that in-core contains nano magnetic material, the integrated circuit that is connected with this coil and contain vibration and amplification and rectification circuit is arranged on the printing forme 130, the Vcc of this integrated circuit, Vout is connected with three leading foots 12 respectively with 0 end, magnetic position-sensing unit 131 and printing forme 130 are formed nanometer magneto-dependent sensor 13, one end of axle 31 is fixed together through the core of axis hole 21 and packing ring 32 and ratchet 33, axle 31, packing ring 32 and ratchet 33 are formed wheel 30, the axis of axle 31 is vertical with ratchet 33, the other end of axle 31 passes from housing 20, wheel 30 is formed restriction ratchet 33 with housing 20 and can only be done with respect to the mechanism of housing 20 around the axis rotation of axle 31, it is characterized in that, it also contains ratchet 34, the manufactured materials of ratchet 34 is soft irons, ratchet 34 is distributed in the edge of ratchet 33 in the mode vertical with ratchet 33, and permanent magnet 14 is bar shaped or horsehoe magnet, and permanent magnet 14 and magnetic position-sensing unit 131 are parallel to each other with their axis and the mode vertical with base 10 is fixed on the base 10, housing 20 and base 10 close-fittings are formed the axis of axle 31 and the axis of permanent magnet 14 and magnetic position-sensing unit 131 and are occupied conplane and parallel to each other together, restriction ratchet 34 can only be from the mechanism that sensing unit 15 passes through.
A kind of modification of the present utility model, it is characterized in that, ratchet 34 occupies same plane with ratchet 33, housing 20 and base 10 close-fittings together, the axis of forming axle 31 occupy conplane with the axis of permanent magnet 14 and magnetic position-sensing unit 131 and the former and back both are orthogonal, limiting ratchet 34 can only be from the mechanism that sensing unit 15 passes through.
Embodiment.Ratchet 34 both can be vertical with ratchet 33, also can occupy same plane with ratchet 33.Main part in addition has following size or index: the diameter of ratchet 33 is 17mm, the length of ratchet 34 and thickness are respectively 10mm and 1mm, the pawl of ratchet 34 is counted P=8, permanent magnet 14 is the cylindrical bar shaped magnet that Surface field intensity, diameter and length are respectively 300mT, 3mm and 5mm, and the width of sensing unit 15 is 2.5mm.
Principle of work.When utilizing the utility model to measure the rotating speed of engine shaft, being connected of axle 31 and housing 20 and engine shaft and support and being connected of socket 11 and counter, described identical with background technology.The utility model obtains power supply from counter from Vcc and 0 end.Ratchet 33 rotates with rotating shaft to be measured, whenever rotates a circle, and P ratchet 34 makes the magnetic flux in this district be subjected to P blocking-up by sensing unit 15, and the utility model transmits P positive pulse by the Vout end to counter.Counter is measured the number n that the utility model is exported pulse p.s. earlier; Then, obtain the rotating speed (rpm) of engine shaft: rotating speed=60n/P with following formula; At last tachometer value is shown from display.Because nanometer magneto-dependent sensor 13 is the sensors that utilize nano microcrystalline material giant magnetoresistance effect to be developed into, its sensitivity is high, so the Surface field intensity of permanent magnet 14 can be weak to several mT, the width of sensing unit 15 still can be done very widely.The wider width of sensing unit 15 can be brought following benefit: the physical construction of sensor is simple, and is easy to process, reduced production cost, reliability height and long service life.In addition, nanometer magneto-dependent sensor 13 also has following two outstanding advantages: operating temperature range is wide, between-100～+ 120 ℃; Frequency response is good, up to 100KHz.To sum up, compare with background technology, the utility model has following advantage:
1. simple in structure, production cost is low;
2. reliability height;
3. long service life;
4. operating temperature range is wide, between-100～+ 120 ℃;
5. frequency response is good, up to 100KHz.
The utility model is particularly suitable for measuring the sensor of the rotating speed of motor car engine, motor and turbine shaft, be a purposes wide, can produce great economic benefit and rising novel rotating speed product sensor.
Claims (3)
1. nanometer magnetosensitive speed probe, contain base 10, socket 11, leading foot 12, permanent magnet 14, magnetic position-sensing unit 131, printing forme 130, housing 20, axis hole 21, axle 31, packing ring 32, ratchet 33, magnetic position-sensing unit 131 is coils that in-core contains nano magnetic material, the integrated circuit that is connected with this coil and contain vibration and amplification and rectification circuit is arranged on the printing forme 130, the Vcc of this integrated circuit, Vout is connected with three leading foots 12 respectively with 0 end, magnetic position-sensing unit 131 and printing forme 130 are formed nanometer magneto-dependent sensor 13, one end of axle 31 is fixed together through the core of axis hole 21 and packing ring 32 and ratchet 33, axle 31, packing ring 32 and ratchet 33 are formed wheel 30, the axis of axle 31 is vertical with ratchet 33, the other end of axle 31 passes from housing 20, wheel 30 is formed restriction ratchet 33 with housing 20 and can only be done with respect to the mechanism of housing 20 around the axis rotation of axle 31, it is characterized in that, it also contains ratchet 34, the manufactured materials of ratchet 34 is soft irons, ratchet 34 is distributed in the edge of ratchet 33 in the mode vertical with ratchet 33, and permanent magnet 14 is bar shaped or horsehoe magnet, and permanent magnet 14 and magnetic position-sensing unit 131 are parallel to each other with their axis and the mode vertical with base 10 is fixed on the base 10, housing 20 and base 10 close-fittings are formed the axis of axle 31 and the axis of permanent magnet 14 and magnetic position-sensing unit 131 and are occupied conplane and parallel to each other together, restriction ratchet 34 can only be from the mechanism that sensing unit 15 passes through.
2. nanometer magnetosensitive revolution speed sensing receiver according to claim 1, it is characterized in that, ratchet 34 occupies same plane with ratchet 33, housing 20 and base 10 close-fittings together, the axis of forming axle 31 occupy conplane with the axis of permanent magnet 14 and magnetic position-sensing unit 131 and the former and back both are orthogonal, limiting ratchet 34 can only be from the mechanism that sensing unit 15 passes through.
3. nanometer magnetosensitive speed probe according to claim 1 and 2, it is characterized in that, main part in addition has following size or index: the diameter of ratchet 33 is 17mm, the length of ratchet 34 and thickness are respectively 10mm and 1mm, the pawl of ratchet 34 is counted P=8, permanent magnet 14 is the cylindrical bar shaped magnet that Surface field intensity, diameter and length are respectively 300mT, 3mm and 5mm, and the width of sensing unit 15 is 2.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01239317 CN2526851Y (en) | 2001-05-15 | 2001-05-15 | Nano-magnetic sensitive rotating speed sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01239317 CN2526851Y (en) | 2001-05-15 | 2001-05-15 | Nano-magnetic sensitive rotating speed sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2526851Y true CN2526851Y (en) | 2002-12-18 |
Family
ID=33651779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01239317 Expired - Fee Related CN2526851Y (en) | 2001-05-15 | 2001-05-15 | Nano-magnetic sensitive rotating speed sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2526851Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102243250A (en) * | 2011-03-29 | 2011-11-16 | 李明生 | Speedometer for steam turbine |
| CN103529234A (en) * | 2013-09-30 | 2014-01-22 | 江阴众和电力仪表有限公司 | Device for detecting revolution speed of nuclear-stage main pump |
| CN107356782A (en) * | 2017-08-21 | 2017-11-17 | 优利德科技(中国)有限公司 | Utilize the device and method of electromagnetic induction device detection engine speed |
| CN109416377A (en) * | 2016-07-15 | 2019-03-01 | 阿尔卑斯电气株式会社 | Current sensor |
-
2001
- 2001-05-15 CN CN 01239317 patent/CN2526851Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102243250A (en) * | 2011-03-29 | 2011-11-16 | 李明生 | Speedometer for steam turbine |
| CN103529234A (en) * | 2013-09-30 | 2014-01-22 | 江阴众和电力仪表有限公司 | Device for detecting revolution speed of nuclear-stage main pump |
| CN109416377A (en) * | 2016-07-15 | 2019-03-01 | 阿尔卑斯电气株式会社 | Current sensor |
| CN107356782A (en) * | 2017-08-21 | 2017-11-17 | 优利德科技(中国)有限公司 | Utilize the device and method of electromagnetic induction device detection engine speed |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |