CN2864680Y - Iron-matrix block amorphous rotation speed sensor - Google Patents
Iron-matrix block amorphous rotation speed sensor Download PDFInfo
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- CN2864680Y CN2864680Y CN 200520145606 CN200520145606U CN2864680Y CN 2864680 Y CN2864680 Y CN 2864680Y CN 200520145606 CN200520145606 CN 200520145606 CN 200520145606 U CN200520145606 U CN 200520145606U CN 2864680 Y CN2864680 Y CN 2864680Y
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Abstract
The utility model relates to an amorphous rotation speed sensor with iron-based block, consisting of a shell, permanent magnet, coil and signal processing circuit, and it is characterized in that the middle of one end near the detected objects in the shell along the radial direction is provided with an amorphous rod of iron-based block, on which is provided with the coil, the two outputs of the coil is connected with the input of the signal processing circuit and there are two permanent magnets, which is relatively arranged to form a stable magnetic circuit in the shell, the level distance between the amorphous rod of iron-based block and the permanent magnet is 2-3mm and the vertical spacing is 0-1mm. It has the advantages that it overcomes the shortcomings of VR sensor and is provided with high sensitivity, and signals within magnetic induction range of more than 3mm are not distorted, with good security; measurement range is wide; high and low temperature resistant performances are excellent; its performances will not be affected in the bad conditions. The utility model has exploited a new field for application of soft magnetic performances of amorphous materials.
Description
Technical field
The utility model relates to a kind of Non-crystalline tachogenerator of iron-base block, belongs to measure rotating object angle, speed pickup.
Background technology
Rotating speed belongs to conventional electrical measurement parameter.Often adopt electro-optical pickoff or magnetoelectric sensor to carry out untouchable measurement when measuring rotating speed.
It is very responsive when photoelectric sensor transmits by rotating disk owing to light to the interference of oil or foul generation, so the function element of photoelectric sensor is designed to seal finely usually, but also have oil or foul enters the sensitizing range in long-term the use, this can influence the measuring accuracy of sensor.Therefore be not suitable for being applied to working under dust, grease and other contaminated environment.
The magneto-electric vehicle speed sensor is the generator of an analog AC signal, and they produce AC signal, is made up of coil and magnetic core with two binding posts usually.Two binding posts of coil are the terminals of sensor output, when the ring-type wing wheel of being made by irony (being sometimes referred to as magnetic group wheel) when rotating through sensor, will produce ac voltage signal in the coil.Magnetoelectric sensor mainly comprises variable-reluctance transducer (VR) and Hall effect speed pickup.The Hall effect speed pickup need consume car body and carry battery power, and can not withstand the environmental limit that VR can stand fully.The operating temperature range of a lot of general telecontrol equipments is from-40 ℃ to 150 ℃, and this has limited the application of Hall effect speed pickup under extreme heat and extremely cold environmental baseline.There are some shortcomings in the VR sensor: sensitivity is low, and the maximal clearance of sensor and transmitting gear (also claiming the magnetic induction distance) has only a few tenths of a mm; When measuring the rotating speed of high speed rotating object, because of installing insecure or being subjected to mechanical vibration, easy and gear bumps, and security is relatively poor, and rugged surroundings adaptability is relatively poor.
Block Fe base amorphous bar is the novel high-performance functional material, has excellent mechanical property, high corrosion-resistant energy and high magnetic conduction, the soft magnetism combination property of low-coercivity.Drop into a large amount of manpower and materials both at home and abroad and develop research in the hope of using in practice.Learn that from U.S. advanced research projects agency (DARPA) website the U.S. just is being devoted to non-crystalline material is applied to the defence and military construction recently, will be on surface car, naval vessels, aircraft, guided missile and the rocket in future this material of widespread use.Non-crystalline material can be widely used in transformer, magnetic head, switching type power supply, magnetic shielding, tension pick-up and other special materials such as invar material, resilient material, absorbing material, cutter material etc. weigh.Be the important rapidly new material of a development, have wide development space.
Summary of the invention
It is higher relatively that the purpose of this utility model provides a kind of sensitivity, and stable performance is simple in structure, and is easy for installation, applicable to various bad working environments conditions, for the seizure and sharp-pointed, the jitter-free Non-crystalline tachogenerator of iron-base block of acquisition pulse of feeble signal.
The purpose of this utility model is realized by following mode:
The utility model comprises shell, permanent magnet, coil, signal processing circuit, it is characterized in that: the middle part near testee one end in the shell radially is provided with iron-base block amorphous rod, coil is located on the iron-base block amorphous barred body, two output terminals of coil connect with the input end of signal processing circuit, permanent magnet is two, arrange the stable magnetic circuit of formation in the enclosure relatively, the horizontal range of iron-base block amorphous rod and permanent magnet is 2-3mm, and vertical interval is 0-1mm.
Above-mentioned permanent magnet can adopt neodymium iron boron, SmCo, the contour performance permanent magnet of samarium iron nitrogen, and it is square, cylindrical that magnet shape can be.It is the iron-base block amorphous alloy system of soft magnet performance excellence that iron-base block amorphous rod can be selected FeAlPCSiB system, FeGaPCSiB system or FeCoNiZrMB for use, and wherein: M represents a kind of among Ti, V, Nb, Ta, Cr, Mo, the W.Diameter can adopt Φ 1-Φ 3mm, can be according to sensor physical dimension and magnet size adjustment.Iron-base block amorphous conduct excellent soft magnetic material, especially high permeance make it be applied to faint Magnetic Sensor becomes possibility: high magnetic permeability can obtain high magnetic flux density, and low coercive force can respond the variation of external magnetic field rapidly.The utility model is selected high performance permanent magnetic materials for use, carries out magnetic Circuit Design, is close to sensor when the motion of the gear teeth (or projection) of measured object gear (magnetic conductive material) during measurement, tooth top and sensor nearest, air gap minimum, magnetic resistance minimum, magnetic flux maximum; The air gap maximum of tooth root and sensor, magnetic resistance maximum, magnetic flux minimum, the motion result of gear causes that magnetic flux changes in time, this induces proportional voltage signal in coil, signal processing circuit becomes input signal into digital waveform (pulse), offers secondary instrument.Sensor outer housing is non-magnetic materials such as magnetism-free stainless steel or copper, is threaded, and can obtain best output signal by the gap of threaded adjusting sensor and measured object transmitting gear.Inner permanent magnetic body, amorphous bar, signal processing circuit add upper plug head and catch (being the non-magnetic material) closed at both ends by resin (resin and fine sand) encapsulation, and overall fixed reaches the antivibration effect.The whole sensor profile is simple, attractive in appearance, and is easy to use, can adjust sensor size according to the practical application condition, measures the parameters such as speed, angle of rotating object.Be installed near the magnet iron-base large-block amorphous because its excellent soft magnet performance, variation to magnetic flux is very responsive, thereby make the maximal clearance (also claiming the magnetic induction distance) of sensor and transmitting gear undistorted greater than 3 millimeters signals, be higher than traditional contactless magnetoelectric transducer far away, the 2.5mm measuring distance of the nanometer magnetosensitive speed probe (patent No. 200310108098.4) of East China Normal University's exploitation increases relatively, therefore stopped when measuring the rotating speed of high speed rotating object and gear bumps, security is good.Iron-base large-block amorphous crystallization temperature is greater than 500 ℃, and high and low temperature resistance is good, and permanent magnet is high temperature resistant to reach 200 ℃; Peripheral circuit is fairly simple; Be quick on the draw, the square-wave pulse signal of output amplitude 〉=10v can be measured the range of speeds of broad; Be particularly useful for the bad working environments condition.
The utility model has the advantages that:
1. simple in structure, attractive in appearance.Magnetic induction distance reaches 3 millimeters, when having prevented measurement and the measured object gear bump, security is good; Consumed power is not saved the energy.
2. heat resistance and freedom from vibration excellence.Iron-base large-block amorphous crystallization temperature is greater than 500 ℃, and the sensor temperature resistant range can reach-50～200 ℃; By resin-encapsulated, whole firm, resistance to shock is good.
3. iron-base large-block amorphous have high permeability and a low-coercivity, can capture weak magnetic signal accurately, and pulse is sharp-pointed, do not have vibration, sensor output pulse amplitude 〉=10V, and measurement range is wide, can reach 4-3500r/min.
4. stable performance is applicable to various bad working environments conditions.The speed probe of the utility model design, heatproof, antivibration, highly sensitive, has the high ratio of performance to price, and Curie temperature height (〉=500 ℃), the following magnetic electricity performance of Curie temperature is not influenced by ambient temperature, but the size of sensor, weight and Hall element quite, can integrated digitized measurement and control, excellent combination property.
Description of drawings
Fig. 1 is the utility model structural representation.
Embodiment
With reference to accompanying drawing 1, the utility model comprises shell 3, permanent magnet 2, coil 5, signal processing circuit, middle part near testee one end in the shell 3 radially is provided with iron-base block amorphous excellent 1, coil 5 is located on the iron-base block amorphous barred body 1, two output terminals of coil connect with the input end of signal processing circuit, and permanent magnet 2 is two, arrange relatively to constitute stable magnetic circuit in shell 3, iron-base block amorphous excellent 1 with the horizontal range of permanent magnet 2 be 2-3mm, vertical interval is 0-1mm.
Embodiment one,
As shown in Figure 1, present embodiment is made up of permanent magnet 2 (2), bulk amorphous alloy rod 1, coil 5, signal processing circuit, lead-in wire 8, shell 3.Adopt the support frame of bakelite 4 as device in shell 3, permanent magnet 2 is selected the high-performance Ne-Fe-B rare earth permanent-magnetic material for use, and diameter is φ 1.5-3mm, length 8-12mm, magnetic field intensity 0.3-0.5T.Bulk amorphous alloy rod 1 is selected for use iron-base block amorphous, diameter phi 1.5mm, and length 6mm, composition are chosen as the FeGaPCSiB non-crystaline amorphous metal.Two permanent magnets 2 are processed into cylindrical being installed on the bakelite according to the magnetic circuit that designs, and stable magnetic field is provided.Bulk amorphous alloy rod 1 is near testee one end, with the permanent magnet horizontal range be 2-3mm, vertical interval is 0-1mm, permanent magnet 2 and bulk amorphous alloy rod 1 usefulness glue are fixed on the circular bakelite 4.Signal processing circuit comprises amplifier 6 and shaping circuit 7,8 offers extension instrument by going between.Iron-base large-block amorphous excellent 1 is installed on the bakelite 4 near gear one end, with the coil 5 composition signal generating sources that twine on it.Because the magnetic permeability μ of bulk amorphous alloy rod 1 is very big, the magnetic permeability of projecting air far away, this just makes most flux concentration to bulk amorphous alloy inside, tooth top and sensor nearest, the air gap minimum, magnetic resistance minimum, the magnetic flux maximum of passing through on the bulk amorphous alloy rod 1; The air gap maximum of tooth root and sensor, the magnetic resistance maximum, the magnetic flux minimum of passing through on the bulk amorphous alloy rod 1, magnetic flux is die-offed, and this will induce proportional voltage signal in coil 5.The rotation of testee gear is every will to produce a pulse through gear teeth of sensor, measures rotating speed with this.Therefore, permanent magnet 2 all will have strict requirement with the gap of position (magnetic Circuit Design), sensor and the transmitting gear of sensor.The signal that obtains is through amplifier 6, the shaping circuit 7 stable square-wave pulse signals of back for amplifying, output pulse amplitude 〉=10V.8 offer instrument by going between.During measurement, gear rotates a circle the identical square-wave pulse signal with the number of teeth of generation.On the shell 3 screw thread is arranged, can regulate the magnetic induction distance according to the real work situation.Two ends are by catch and plug sealing, and inner bakelite 4 and signal processing circuit are fixing by resin and fine sand encapsulation, and the whole sensor profile is simple, attractive in appearance, and is easy to use, in order to measure the speed and the angle of rotating object.Iron-base large-block amorphous soft magnet performance with excellence, it is undistorted to expand 3mm to for the gap of sensor and transmitting gear, has guaranteed security.The installation of bulk amorphous alloy will with the magnetic Circuit Design of permanent magnet coupling, make magnetic flux change maximum in the coil, the signal amplitude of output is big more, reacts sensitive more, measurement range can reach 4-3500r/min.The bulk amorphous alloy crystallization temperature is higher than 500 ℃, and soft magnet performance is unaffected under this temperature, so high and low temperature resistance is good, is applicable under the bad working environments condition and uses.Rely on the variation excitation signal of magnetic flux, do not need consumed power, save the energy.
Embodiment two,
Used permanent magnet material is selected the SmCo high performance permanent magnetic materials for use, is shaped as rectangle, and wide, height is 3-6mm, length 8-12mm, magnetic field intensity 0.3-0.5T.Bulk amorphous alloy rod 1 is selected FeAlPCSiB non-crystaline amorphous metal, diameter phi 1mm, length 6mm for use.Other are with embodiment one.
Embodiment three,
Used permanent magnet material is selected samarium iron nitrogen high performance permanent magnetic materials for use, is shaped as rectangle, and wide, height is 3-6mm, length 8-12mm, magnetic field intensity 0.3-0.5T.Bulk amorphous alloy rod 1 is selected FeCoNiZrNbB non-crystaline amorphous metal, diameter phi 2mm, length 6mm for use.Other are with embodiment one.
Claims (3)
1, a kind of Non-crystalline tachogenerator of iron-base block, comprise shell, permanent magnet, coil, signal processing circuit, it is characterized in that: the middle part near testee one end in the shell radially is provided with iron-base block amorphous rod, coil is located on the iron-base block amorphous barred body, two output terminals of coil connect with the input end of signal processing circuit, permanent magnet is two, arrange relatively in the enclosure and constitute stable magnetic circuit, the horizontal range of iron-base block amorphous rod and permanent magnet is 2-3mm, and vertical interval is 0-1mm.
2, Non-crystalline tachogenerator of iron-base block according to claim 1, it is characterized in that: it is iron-base block amorphous alloy system that iron-base block amorphous rod is selected FeAlPCSiB system, FeGaPCSiB system or FeCoNiZrMB for use, and wherein: M represents a kind of among Ti, V, Nb, Ta, Cr, Mo, the W.
3, Non-crystalline tachogenerator of iron-base block according to claim 1 is characterized in that: the diameter of iron-base block amorphous rod is φ 1.5mm, and length is 6mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520145606 CN2864680Y (en) | 2005-12-02 | 2005-12-02 | Iron-matrix block amorphous rotation speed sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520145606 CN2864680Y (en) | 2005-12-02 | 2005-12-02 | Iron-matrix block amorphous rotation speed sensor |
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| Publication Number | Publication Date |
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| CN2864680Y true CN2864680Y (en) | 2007-01-31 |
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| CN 200520145606 Expired - Fee Related CN2864680Y (en) | 2005-12-02 | 2005-12-02 | Iron-matrix block amorphous rotation speed sensor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305873A (en) * | 2011-05-20 | 2012-01-04 | 航天科技控股集团股份有限公司 | Vehicle speed sensor for motor vehicle |
| CN102854333A (en) * | 2012-09-18 | 2013-01-02 | 哈尔滨工程大学 | Hot-redundant magnetic-electric rotational-speed sensor |
| CN103884859A (en) * | 2014-02-27 | 2014-06-25 | 宁波南车时代传感技术有限公司 | Magnetoelectric velocity transducer with self-checking function |
| CN104155468A (en) * | 2014-08-14 | 2014-11-19 | 新誉集团有限公司 | Magnet induction lantern ring used for measuring rate of rotating shaft of mechanical equipment |
-
2005
- 2005-12-02 CN CN 200520145606 patent/CN2864680Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305873A (en) * | 2011-05-20 | 2012-01-04 | 航天科技控股集团股份有限公司 | Vehicle speed sensor for motor vehicle |
| CN102854333A (en) * | 2012-09-18 | 2013-01-02 | 哈尔滨工程大学 | Hot-redundant magnetic-electric rotational-speed sensor |
| CN103884859A (en) * | 2014-02-27 | 2014-06-25 | 宁波南车时代传感技术有限公司 | Magnetoelectric velocity transducer with self-checking function |
| CN104155468A (en) * | 2014-08-14 | 2014-11-19 | 新誉集团有限公司 | Magnet induction lantern ring used for measuring rate of rotating shaft of mechanical equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Ruike Rare-earth Metallurgy and Functional Materials State Engineering Research Assignor: Baotou Rare Earth Institute Contract fulfillment period: 2008.10.20 to 2013.10.20 Contract record no.: 2008150000016 Denomination of utility model: Iron-matrix block amorphous rotation speed sensor Granted publication date: 20070131 License type: Exclusive license Record date: 20081209 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.10.20 TO 2013.10.20; CHANGE OF CONTRACT Name of requester: RUIKE RARE EARTHS METALLURGY AND FUNCTION MATERIAL Effective date: 20081209 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070131 Termination date: 20121202 |