CN2033899U - Magneto-elastic torque transmitter - Google Patents
Magneto-elastic torque transmitter Download PDFInfo
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- CN2033899U CN2033899U CN 87210155 CN87210155U CN2033899U CN 2033899 U CN2033899 U CN 2033899U CN 87210155 CN87210155 CN 87210155 CN 87210155 U CN87210155 U CN 87210155U CN 2033899 U CN2033899 U CN 2033899U
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- soft magnetic
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Abstract
The utility model discloses a magneto-elastic torque sensor making use of magnetostrictive effect. The position of the transmission shaft of a torque pasted on the sheet bands of soft magnetic alloys is uniformly plated one layer of copper, two sets of the sheet bands of soft magnetic alloys are respectively pasted on the copper plating and the sheet bands which form the angle of (+/-) 45 DEG with the transmission shaft of a torque are fully symmetrical, the periphery of the transmission shaft of a torque is correspondingly provided with two sets of field coils and test coils, and the outer layer of the coils is provided with a magnetic outer cover, so the sensitivity and the antijamming capability of the utility model are effectively improved.
Description
The utility model has related to a kind of soft magnetic material magnetostrictive effect of utilizing, and in the noncontact mode, measures the sensor of moment of torsion or torque.Particularly a kind of output level height, good linearity, the magnetically elastic torque sensor that antijamming capability is strong.This magnetically elastic torque sensor can be widely used in measures static state and dynamic torque.
Existing torque sensor is divided three classes: the first kind is the torque sensor of strain chip, and it uses one group of foil gauge as sensitive element.Foil gauge sticks on the moment of torsion transmitter shaft with the form of bridge type return, there is following point in this sensor: when foil gauge is used for rotary system, needs distant action instrument or be used to connect the slip ring device of foil gauge, collector ring belongs to wear-out part, thereby the life-span is short, and maintenance is very difficult simultaneously.Second class is to reverse the torque sensor of angie type, and its uses the magnetic element be installed in two different parts on the transmission shaft or reflecting element as sensitive element, by the measuring difference of phases at two positions is measured moment of torsion.This class sensor bulk is very big, and inconvenience is installed, simultaneously the poor-performing of low speed.The 3rd class is a magnetically elastic torque sensor, and it utilizes the magnetostrictive effect principle of magnetic material to detect moment of torsion.It is made up of magnetizing coil, measurement coil and elastic shaft, and this class sensor can be realized the torque measurement of noncontact mode, and former measuring system is had no adverse effect.A kind of magnetoelastic sensor that is proposed as Jap.P. (clear and 61-42180).But it exists two unavoidable problem: 1. it has vertically pasted the soft magnetic alloy sheet-band of one deck as the stress sensitive element on transmission shaft, and measure coil and have only one group, when the axle square is zero, output signal is non-vanishing, make secondary instrument complicated, increased systematic error.2. for fear of the influence of the magnetic of axis body material for measurement own, it has pasted one deck aluminium flake between strip and axis body material, play shielding action in addition, but barbola work is complicated, be difficult to the concentricity of assurance outside surface, and have internal stress to exist, the accuracy of directly influence mensuration with axle.
Task of the present utility model is that a kind of novel magnetically elastic torque sensor will be provided.It can not be subjected to axis body surface internal stress and uneven influence of the magnetic of axis body own, reaches stable output signal, highly sensitive, the linearity reaches the strong measurement effect of antijamming capability well.
Task of the present utility model is finished as follows:
On the torque transmitting shaft 1 of magnetically elastic torque sensor, the position of pasting soft magnetic alloy sheet-band is coated with layer of copper 2 earlier, plays magnetic screening action, avoids the interference of axis body magnetism of material.On this copper coating, paste respectively two groups fully symmetry, have evenly spaced soft magnetic alloy sheet-band 3,3 ', the number of two groups of soft magnetic alloy sheet-bands is identical, and is symmetrically chevron shapedly mutually, becomes with the axial line of torque transmitting shaft ± the 45 stickup.The amorphous alloy that two groups of soft magnetic alloy sheet-bands in the utility model adopt Fe-Si-B to constitute.In the periphery of above-mentioned soft magnetic alloy sheet-band two groups of garden solenoids of being made up of magnetizing coil 6,7 and magnetic test coil 8,9 are set respectively, magnetizing coil is positioned at the inside of magnetic test coil.Two groups of coils are corresponding with two groups of soft magnetic alloy sheet-bands respectively.Two magnetizing coil series connection are set up constant alternating magnetic field with AC power 11 in the surf zone of torque transmitting shaft 1.Two differential connections of magnetic test coil.Like this, when moment of torsion that torque transmitting shaft bore was zero, magnetic test coil was output as zero; When torque transmitting shaft bears moment of torsion or torque, two groups of soft magnetic alloy sheet-bands bear respectively on the direction of its stickup and draw, compressive stress, its magnetostriction effect increases respectively or reduces, a voltage signal output that is proportional to moment of torsion is just arranged in the differential detection coil like this, and this signal is directly sent into demonstration after the process signal gives processing on the sensor.In addition, be covered with E font magnetic outer cover 10 in the outside of coil, this outer cover is made of the soft magnetic material of high magnetic conductivity, low iron loss, low-coercivity, its soft magnetic alloy sheet- band 3,3 on sticking on torque transmitting shaft ', constitute the closed loop magnetic circuit, improved sensitivity, the linearity and antijamming capability effectively.The utility model manufacture craft is simple, and it can not be subjected to uneven influence of the magnetic of axis body own, reaches stable output signal, measures effect accurately.Also add in this sensor body in addition one group of speed probe of being made up of Hall element and magnet steel gear is installed, can measure the rotating speed of transmission shaft simultaneously.The utility model is widely used in measurement:
The output torque of various power such as a, internal combustion engine, motor, diesel engine.
Required torque when various working machines such as b, compressor, water pump are worked.
C, various lathe required torque in operating process.
Moment of torsion that d, various power-transmission system transmitted and transmission efficiency thereof etc.
Below with reference to accompanying drawing utility model is done to describe in further detail:
Fig. 1 is the utility model principle schematic.
Fig. 2 is the utility model structural representation.
Fig. 3 is that the power supply supply lines of the utility model magnetizing coil and the signal of magnetic test coil output signal give processing circuitry figure.
With reference to Fig. 1, Fig. 2, the utility model leaks on torque drive axis body 1 for fear of magnetic flux, plates layer of copper 2 equably in the torque measurement part of the stickup soft magnetic material of moment of torsion transmitter shaft 1, plays magnetic screening action.In two of the appearance of copper layer parallel ring zones, gardens, respectively with becomes with shaft centre line+directions of 45 ° and-45 ° paste two groups symmetrical fully, have evenly spaced soft magnetic alloy sheet- band 3,3 '.The number of two groups of soft magnetic alloy sheet-bands is identical, and is symmetrically chevron shaped mutually.Soft magnetic alloy sheet-band adopts with Fe-Si-B and constitutes amorphous alloy.Paste the periphery of soft magnetic ribbon at torque transmitting shaft, settle a coil rack 4,5 respectively with one heart, be wound with magnetizing coil 6,7 on each coil rack earlier, and then be wound with magnetic test coil 8,9, magnetizing coil 6,7 series connection, utilize AC power 11 to play excitatory effect, set up stable alternating magnetic field on the torque transmitting shaft surface.Magnetic test coil 8,9 differential connections, detect the variation of magnetic flux in two strips respectively, export a voltage signal that is proportional to moment of torsion, skin at coil rack also surrounds E type magnetic cover 10, magnetic cover 10 is made up of permeability magnetic material, it and the amorphous alloy strip 3,3 ' together that sticks on the torque transmitting shaft 1 constitute the closed loop magnetic circuit, can reduce flux loss, have improved sensitivity, the linearity and the anti-interference of sensor.When moment of torsion that torque transmitting shaft bore was zero, the magnetoconductivity of two strips equated that the induction electromotive force of two magnetic test coils 8,9 equates, is output as zero after the differential connection, has guaranteed the zero-bit output characteristics.When transmission shaft bore as shown in the figure moment of torsion, according to Analysis of materials mechanics, the strip 3 on the left side bore compressive stress in the longitudinal direction, the strip 3 on the right ' bear in the longitudinal direction tension.Because amorphous alloy ribbon has the direct magnetostriction coefficient, bear that magnetoconductivity increases on the direction of tension, the magnetoconductivity of bearing on the direction of compressive stress reduces, the distribution of magnetic flux has lost original balance, be distributed in by magnetizing coil produced the right strip 3 ' on magnetic flux increase, and the magnetic flux of left side strip 3 reduces.Correspondingly the induction electromotive force in the magnetic test coil 8 increases, and induction electromotive force reduces in the magnetic test coil 9, and differential connection just has a voltage signal output later on.In the magnetic test coil 8 in the recruitment of induction electromotive force and the magnetic test coil 9 decrease of induction electromotive force equate, so differential output signal is the twice of single group coil output signal, increased sensitivity.
With reference to Fig. 3: on the torque sensor body, added a signal and given treatment circuit.Two groups of output terminals of measuring coil are connected on the input end that two groups of signals give treatment circuit respectively.The function that this signal gives treatment circuit is will measure the alternation induced voltage that produces in the coil respectively to give and carry out demodulation, filtering earlier, and then carry out differential connection, avoided effectively for this reason since phase shift caused (difference) the total null voltage non-vanishing shortcoming that exists between two groups of alternation induced voltages (DC voltage does not have phase shift, as long as numerical value equates that its difference must be zero).And having solved sensor does not need any subsidiary condition just can directly test clockwise and the moment of torsion of counter-clockwise two kinds of directions.After connecting AC power, magnetizing coil 6,7 just causes excitatory effect, in the surf zone of torque transmitting shaft 1, set up stable alternating magnetic field, thereby the electric potential signal by magnetic test coil 8,9 outputs then gives demodulation, the filtering of processing circuitry through signal respectively, and then carry out differential comparison, directly send into measurement instrument and show.Need not to amplify and directly to send into demonstration because output level is higher, simplified the structure of secondary instrument, so reduced the systematic error of instrument widely.
Claims (5)
1, one contains torque transmitting shaft, soft magnetic alloy sheet-band, magnetizing coil, magnetic test coil, the magnetically elastic torque sensor of magnetic outer cover, it is characterized in that pasting on the torque transmitting shaft soft magnetic ribbon position and be coated with copper capping layer 2 in advance, in two of the appearance of copper layer 2 parallel ring zones, gardens, paste two groups of symmetries fully respectively, have evenly spaced soft magnetic alloy sheet-band 3,3 ', the number of two groups of soft magnetic alloy sheet-bands is identical, and becomes chevron shaped symmetrically; In the periphery that torque transmitting shaft is pasted soft magnetic ribbon, correspondence has been installed two groups of magnetizing coils 6,7 and magnetic test coil 8,9 with one heart, and E font magnetic outer cover 10 has been installed in the periphery of two groups of magnetic test coils.
2, magnetically elastic torque sensor according to claim 1 is characterized in that: soft magnetic alloy sheet-band 3,3 ' respectively becomes with the torque drive shaft centre line ± 45 ° of directions stickups.
3, according to claim 1,2 described magnetically elastic torque sensors, it is characterized in that: said soft magnetic alloy sheet-band is the amorphous alloy that Fe-Si-B system constitutes.
4, according to claim 1,2 described magnetically elastic torque sensors, its feature also is: the signal that described magnetic test coil and can export the direct demodulation of direct current signal gives treating apparatus and links.
5, magnetically elastic torque sensor according to claim 3, its feature also is: the signal that said magnetic test coil and can export the direct demodulation of direct current signal gives treating apparatus and links.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87210155 CN2033899U (en) | 1987-07-15 | 1987-07-15 | Magneto-elastic torque transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87210155 CN2033899U (en) | 1987-07-15 | 1987-07-15 | Magneto-elastic torque transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2033899U true CN2033899U (en) | 1989-03-08 |
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ID=4825128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87210155 Pending CN2033899U (en) | 1987-07-15 | 1987-07-15 | Magneto-elastic torque transmitter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2033899U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101191826B (en) * | 2006-11-30 | 2012-01-11 | 西门子Vdo汽车公司 | Electric solenoid magnetometer |
| CN107628185A (en) * | 2016-07-18 | 2018-01-26 | 行安机电股份有限公司 | Torsion force indicator |
| CN109000835A (en) * | 2018-09-19 | 2018-12-14 | 西安旭彤电子科技股份有限公司 | A kind of dynamic difference formula torque sensor |
| CN109661565A (en) * | 2016-07-25 | 2019-04-19 | 特拉法格股份公司 | For power or the sensing head of torque sensor |
| CN109891186A (en) * | 2016-09-23 | 2019-06-14 | 哈姆林电子(苏州)有限公司 | Integrated form dual rotary position sensor |
| CN111006804A (en) * | 2020-01-14 | 2020-04-14 | 平顶山学院 | Torque measuring device and measuring method thereof |
| CN114992320A (en) * | 2022-06-20 | 2022-09-02 | 中国第一汽车股份有限公司 | Torque distribution calibration system and method |
-
1987
- 1987-07-15 CN CN 87210155 patent/CN2033899U/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101191826B (en) * | 2006-11-30 | 2012-01-11 | 西门子Vdo汽车公司 | Electric solenoid magnetometer |
| CN107628185A (en) * | 2016-07-18 | 2018-01-26 | 行安机电股份有限公司 | Torsion force indicator |
| CN109661565A (en) * | 2016-07-25 | 2019-04-19 | 特拉法格股份公司 | For power or the sensing head of torque sensor |
| CN109891186A (en) * | 2016-09-23 | 2019-06-14 | 哈姆林电子(苏州)有限公司 | Integrated form dual rotary position sensor |
| CN109000835A (en) * | 2018-09-19 | 2018-12-14 | 西安旭彤电子科技股份有限公司 | A kind of dynamic difference formula torque sensor |
| CN109000835B (en) * | 2018-09-19 | 2020-09-11 | 西安旭彤电子科技股份有限公司 | Dynamic differential torque sensor |
| CN111006804A (en) * | 2020-01-14 | 2020-04-14 | 平顶山学院 | Torque measuring device and measuring method thereof |
| CN114992320A (en) * | 2022-06-20 | 2022-09-02 | 中国第一汽车股份有限公司 | Torque distribution calibration system and method |
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