CN2065757U - Counter magnetostrictive torque transducer - Google Patents
Counter magnetostrictive torque transducer Download PDFInfo
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- CN2065757U CN2065757U CN 89214499 CN89214499U CN2065757U CN 2065757 U CN2065757 U CN 2065757U CN 89214499 CN89214499 CN 89214499 CN 89214499 U CN89214499 U CN 89214499U CN 2065757 U CN2065757 U CN 2065757U
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- torque sensor
- magnetic
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- converse magnetostriction
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Abstract
The utility model relates to a counter magnetostrictive torque transducer, which comprises a shaft-communicated style and an attachable style. A sheet band of soft-magnetic alloy of an amorphous state which is pasted on the surface of a shaft is used as a sensing element, the outside of the utility model is provided with a finger-inserting type measuring head, and two pairs of coils of excitation and measurement are sheathed on the upper cover of the counter magnetostrictive torque transducer. The utility model takes advantage of the magnetostrictive effect of the sensing element to test the sizes and directions of a torque, which overcomes the defects existing in the prior art that the size of the sensor is big, the output of the zero position is high, the closed degree of a magnetic field is low, etc. The utility model can be used for the tests of the torque which is in the condition of quiescence or rotation, and the counter magnetostrictive torque transducer has multiple functions. A computer can be externally connected with the utility model to offer parameters such as the torque, the speed of rotating, the power of turning, instantaneous values, average values, values, etc.
Description
The utility model belongs to a kind of converse magnetostriction torque sensor, and the moment of torsion that can be applicable to static or rotation status detects.The utility model provides two kinds of structural shapes: axle general formula and attached type.The former connects with measured axle and carries out the moment of torsion detection; The latter is installed in the measured axis outside in non-contacting mode and tests.
The axle general formula torque sensor of existing practicability is divided into two big classes from the signal transmission in form, and a class is a contact measurement, and two classes are non-cpntact measurements.Contact measurement is to utilize foil gauge to detect the electrostrictive strain signal of measured axis, draws signal by the sliding conduction ring, and its major defect is that the wearing and tearing of conducting ring have limited the application of this class sensor when surveying the turning axle moment of torsion.The second class non-contact measurement torque sensor can be divided into torsion angle measurement and converse magnetostriction again and measure two kinds.Wherein the torsion angle survey sensor is done the axle of sensor longly usually, and thinner shortcoming is that volume is big to improve sensitivity, and weight is big, and coefficient safe in utilization is low.
The converse magnetostriction torque sensor that grew up in recent years utilizes counter magnetostriction effect to detect, but general ferromagnetism axle magnetostriction coefficient λ S is little, λ S=10
-6Frequency characteristic is low, so the sensitivity of sensor is low, volume and weight is bigger.For example the general measure torque range is that the torque sensor weight of 20Kgm is in (10+n)～n * 10Kg(1＜n＜10).
The patent that part notification number CN2033899U is arranged recently discloses a kind of novel converse magnetostriction torque sensor, and as shown in Figure 1, it utilizes amorphous soft magnetic alloy sheet (5) (λ S=10～100 * 10
-6) stick on the measurement axis (6) as sensitive material.Coil is enclosed within on the measurement axis, and internal diameter is very big, (4) expression magnetizing coil among the figure, and two branch roads of coil are measured in (1), (2) expression, and (3) are common ports.Magnetic flux distributes vertically, because the sectional area of axle is much larger than the cutting plane of alloy sheet, most of magnetic flux can't be closed, cause zero-bit output height and sensitivity is low, usually reach zero-bit output than high 2 orders of magnitude of useful signal, cause signal to detect difficulty,, be vulnerable to disturb and cause the reading instability because magnetic circuit is long.The axle of different-diameter just has the coil of different-diameter and the magnetic cover of different sizes in addition, and sensitive material " people " font on axle is glued the method complex process, has improved the complete machine cost.
In some occasion, for example the torque monitoring of equipment such as rolling mill, propeller for vessels main shaft, large-scale engineering machinery is unsuitable for common axle general formula torque sensor.And the domestic amorphous products still of attached type torque sensor, external product can increase number of the edition referring to " instrumentation technology " 87.This sensor is after utilizing tested transmission shaft to be turned round, and the surperficial all directions magnetoconductivity of axle changes and detects moment of torsion, promptly utilizes counter magnetostriction effect.Because general axis is very little generally at λ S=10 with the magnetostriction coefficient λ S of ferrimagnet
-6About, and because the thermal treatment and the composition segregation of axial wood cause the surperficial λ S of axle inhomogeneous.Transmission shaft in the running, the easy measured head of stray magnetic field picks up, and causes output to disturb, the material of axle also has considerable influence to measuring.Its measuring head adopts the double gate type magnetic core in addition, the closed degree in magnetic field is poor, cause the Distribution of Magnetic Field complexity, outer stray field is big, often electrical null position occurs and mechanical zero is inconsistent, if produce by batch, the properties of product consistance is poor, its zero-bit output when moment of torsion (no signal output) is bigger, and above 1～2 order of magnitude of signal, unfavorable signal detects usually.For avoiding interference, must adopt the nonferromagnetic shell.
The purpose of this utility model is to provide a kind of magnetic circuit that has overcome existing torque sensor defective shorter, and antijamming capability is stronger, and outer stray field seldom, sensor performance is not influenced by axial wood, volume is little, and is in light weight, but the flexible torque sensor of overload capacity contrary magnetic stronger and a tractor serves several purposes.
For overcoming the shortcoming of existing torque sensor, the technical solution adopted in the utility model is: stick on the cylindrical of general formula torque sensor transmission shaft or on the measured axis cylindrical of attached type torque sensor with an amorphous soft magnetic ribbon, alloy thin band and axis normal, in the alloy thin band outside finger-inserting type measuring head is installed, its bottom is a closo, a pair of excitatory magnetic pole and a pair of measurement magnetic pole are over against alloy thin band and symmetrical distribution, be with coil on the magnetic pole, set up magnetic field by the electric current that is added in the coil, as shown in Figure 2, A, B is a magnetizing coil, C, D is for measuring coil, R
AC, R
AD, R
BD, R
BCThe expression magnetic resistance, since symmetry, magnetic bridge road balance, four equivalent magnetic resistances equate, measurement coil C, the last electromotive force of D equate that difference is zero, when transmission shaft has been executed moment of torsion, cause tension and compression stress on the alloy band, thereby cause in the magnetic bridge road in the two opposite groups magnetic resistance one group of increase, one group of minimizing, make and measure the size that the last electromotive force of coil C, D produces difference, its size moment of torsion that embodiment adds, its direction has been indicated the direction of moment of torsion.
The scheme that the utility model adopts, magnetic circuit is short, and antijamming capability is strong, and the magnetic field in the axle greatly reduces, and sensor performance is not influenced by axial wood.Inserting finger-type ferrite measuring head bottom in addition be closo, helps the magnetic bridge balance, exports (zero position output value only is the several times of torque signal value) and helps signal and detect thereby make measuring head have less zero-bit.Moreover outer stray field seldom, and shell can needn't be considered magnetic shielding by multiple made.Adopt this structure, be convenient to make, material there is not specific (special) requirements, volume is little, (measuring the following sensor weight of moment of torsion 100Kgm all below 10Kg) in light weight overload capacity strong (200%), a tractor serves several purposes, external computing machine can provide: moment of torsion, rotating speed, turn to, parameter and instantaneous value and mean value, maximum value etc. such as power.
Accompanying drawing 1 is existing torque sensor structure principle chart;
Accompanying drawing 2 is fundamental diagrams of the present utility model;
Accompanying drawing 3 is the utility model embodiment--axle general formula converse magnetostriction torque sensor structural drawing;
Accompanying drawing 4 is the utility model embodiment--attached type converse magnetostriction torque sensor structural drawing.
The utility model is described in further detail below in conjunction with two embodiment:
One, axle general formula converse magnetostriction torque sensor:
As shown in Figure 3, on the transmission shaft (1) of torque sensor, perpendicular to axis, paste an amorphous soft magnetic ribbon (2) along circumference, its material is a Co-Si-B system, in the alloy thin band outside one or many finger-inserting type measuring heads (5) are housed, its bottom is the closed magnetic circuit of bowl formula, also can adopt ring-type and sheet.The material of measuring head is a ferrite.Over against alloy thin band be symmetrically distributed a pair of excitatory magnetic pole (3) and a pair of measurement magnetic pole (4), be with coil on the magnetic pole, measuring head is fixed on shell (6) inwall, and shell and transmission shaft (1) have guaranteed that by bearing (7) supporting the gap of measuring head and alloy band is even.Between the measuring head adjacent pole, install additional and regulate magnetic core (8), the magnetic circuit balance is played the fine setting effect, with the compensation foozle.Be fixed with optoelectronic switch (9) on the shell, light barrier (10) be housed on the axle can be used as speed probe and the moment of torsion gating signal when deciding the angle sampling.In order further to improve even angle, many measuring heads can be set in the enclosure, suitably connect, the signal output amplitude can be improved and total output the end of a thread number needn't be changed.
Two, attached type converse magnetostriction torque sensor:
As shown in Figure 4, the surface of measured axis (1) with axially become 90 one section of degree stickup or all amorphous soft magnetic ribbons (2) as sensitive element, its arranged outside one finger-inserting type measuring head (3) is made by ferrite, four magnetic poles are arranged, all over against the alloy band, and keep uniform gap, be with coil (4), (5) on the magnetic pole, in a pair of coil (5) of plus pole, add excited signal, set up magnetic field, its external magnetic circuit is mainly to form in the alloy band, comprises four equivalent magnetic resistance R
AD, R
BC, R
AC, R
BD(see figure 2), when measured axis was not subjected to moment of torsion, four magnetic resistance equated, magnetic bridge road balance, the magnetic potential difference of measuring interpolar are zero, and the induced potential of measuring coil equates, when axle was subjected to torsional interaction, the axle surface produced torsional deformation, was reflected in and produced compression stress and drawing stress (Fig. 2) on the alloy thin band on the different directions, cause that magnetoconductivity changes, change four equivalent magnetic resistance values, and then make increase of measurement coil electromotive force, a minimizing, when torque direction changed, electromotive force increase and decrease trend was opposite.Reflected the size of moment of torsion by the size of potential difference values, the direction of difference has reflected the direction of moment of torsion.The magnetostriction coefficient of the Co-Si-B series non-crystalline state alloy that the utility model uses is λ S=10～100 * 10
-6, than the λ S=10 of common axle with ferrimagnet
-6Big 2～3 orders of magnitude.Simultaneously the magnetic permeability of alloy band is also much larger than common ferrimagnet, do not enlarged the scope of application thereby not influenced by the magnetic characteristic of axial wood.This amorphous alloy can be operated in 5～50KHZ, makes the volume of sensor do very for a short time, has now made the sensor of tens grammes per square metres.The measuring head bottom is a closed magnet in addition, and magnetic resistance is little, and stray field is little, and it is good to produce consistency of performance by batch.Because the magnetic circuit symmetry is good, the zero-bit output that does not add moment of torsion is very low, with torque signal in a numbers of poles, help signal and detect.Its shell (6) also can be regulated screw core (7) for a small amount of uneven setting of magnetic circuit that the free size deviation causes by multiple made (ferromagnetic and non-ferromagnetic all can) between adjacent windings, Distribution of Magnetic Field is regulated on a small quantity.Mechanical zero is overlapped fully with electrical null position.When being used for super thick, also can adopt along axle cylindrical different angles several sensors are installed, signal is carried out overall treatment, both can improve sampling frequency, can improve reliability, homogeneity again.
Claims (6)
1, a kind of converse magnetostriction torque sensor comprises two kinds of patterns of a general formula and attached type, uses amorphous soft magnetic alloy as sensitive element, carry out excitatory respectively and detection with two groups of coils, it is characterized in that its amorphous soft magnetic alloy sensitive element is to make strip shape, and sticks on:
On the transmission shaft of a, axle general formula converse magnetostriction torque sensor;
B, attached type converse magnetostriction torque sensor by on the side shaft;
In the said amorphous soft magnetic ribbon outside finger-inserting type measuring head is housed, a pair of excitatory magnetic pole and a pair of measurement magnetic pole, be with coil on the magnetic pole, and face alloy thin band and be symmetrical distribution, the fine setting screw core of compensation magnetic balance is housed between adjacent windings.
2, converse magnetostriction torque sensor as claimed in claim 1 is characterized in that, it is alloy that its amorphous soft magnetic ribbon can adopt Co-Si-B.
3, converse magnetostriction torque sensor as claimed in claim 1 or 2 is characterized in that, the circumference that said amorphous soft magnetic ribbon can use a section or a whole loop material to paste spool along institute is pasted perpendicular to axis.
4, converse magnetostriction torque sensor as claimed in claim 3 is characterized in that, the bottom of said finger-inserting type gauge head is bowl-shape closed magnetic circuit, also can adopt ring-type, sheet.
5, converse magnetostriction torque sensor as claimed in claim 4 is characterized in that, the material of said finger-inserting type gauge head can be a ferrite.
6, converse magnetostriction torque sensor as claimed in claim 5 is characterized in that, said finger-inserting type gauge head can adopt single or multiple connections.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89214499 CN2065757U (en) | 1989-07-31 | 1989-07-31 | Counter magnetostrictive torque transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89214499 CN2065757U (en) | 1989-07-31 | 1989-07-31 | Counter magnetostrictive torque transducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2065757U true CN2065757U (en) | 1990-11-14 |
Family
ID=4870277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89214499 Withdrawn CN2065757U (en) | 1989-07-31 | 1989-07-31 | Counter magnetostrictive torque transducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2065757U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101975548A (en) * | 2010-09-26 | 2011-02-16 | 上海交通大学 | Sensor for detecting high-precision corner and torque of precision mechanism |
| CN101720424B (en) * | 2007-04-14 | 2012-03-07 | 谢夫勒两合公司 | Shaft arrangement having a rolling bearing |
| CN101960274B (en) * | 2008-02-28 | 2012-10-03 | 本田技研工业株式会社 | Magneto-strictive torque sensor, method for manufacturing the same, and electric power steering system |
| CN105899922A (en) * | 2014-01-14 | 2016-08-24 | 舍弗勒技术股份两合公司 | Arrangement for measuring a force or a torque on a machine element |
| CN106679560A (en) * | 2016-12-02 | 2017-05-17 | 安徽沃巴弗电子科技有限公司 | Electromagnetic induction type torque angle sensor |
| CN108562388A (en) * | 2018-04-23 | 2018-09-21 | 哈尔滨工业大学 | A kind of contactless torque measuring device based on counter magnetostriction effect |
| CN111416211A (en) * | 2020-03-31 | 2020-07-14 | 西安交通大学 | Ultralow frequency magnetoelectric antenna based on inverse magnetoelectric effect and preparation method thereof |
| CN115031877A (en) * | 2022-06-09 | 2022-09-09 | 哈尔滨工业大学（深圳） | Method for detecting stress magnitude and stress direction of steel wire rope |
-
1989
- 1989-07-31 CN CN 89214499 patent/CN2065757U/en not_active Withdrawn
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101720424B (en) * | 2007-04-14 | 2012-03-07 | 谢夫勒两合公司 | Shaft arrangement having a rolling bearing |
| CN101960274B (en) * | 2008-02-28 | 2012-10-03 | 本田技研工业株式会社 | Magneto-strictive torque sensor, method for manufacturing the same, and electric power steering system |
| CN101975548A (en) * | 2010-09-26 | 2011-02-16 | 上海交通大学 | Sensor for detecting high-precision corner and torque of precision mechanism |
| CN101975548B (en) * | 2010-09-26 | 2012-09-05 | 上海交通大学 | Sensor for detecting high-precision corner and torque of precision mechanism |
| CN105899922A (en) * | 2014-01-14 | 2016-08-24 | 舍弗勒技术股份两合公司 | Arrangement for measuring a force or a torque on a machine element |
| CN105899922B (en) * | 2014-01-14 | 2019-08-13 | 舍弗勒技术股份两合公司 | For measuring the device of power or torque on machine element |
| CN106679560A (en) * | 2016-12-02 | 2017-05-17 | 安徽沃巴弗电子科技有限公司 | Electromagnetic induction type torque angle sensor |
| CN106679560B (en) * | 2016-12-02 | 2020-03-17 | 安徽沃巴弗电子科技有限公司 | Electromagnetic induction type torque angle sensor |
| CN108562388A (en) * | 2018-04-23 | 2018-09-21 | 哈尔滨工业大学 | A kind of contactless torque measuring device based on counter magnetostriction effect |
| CN111416211A (en) * | 2020-03-31 | 2020-07-14 | 西安交通大学 | Ultralow frequency magnetoelectric antenna based on inverse magnetoelectric effect and preparation method thereof |
| CN111416211B (en) * | 2020-03-31 | 2021-08-13 | 西安交通大学 | Ultralow frequency magnetoelectric antenna based on inverse magnetoelectric effect and preparation method thereof |
| CN115031877A (en) * | 2022-06-09 | 2022-09-09 | 哈尔滨工业大学（深圳） | Method for detecting stress magnitude and stress direction of steel wire rope |
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| C06 | Publication | ||
| PB01 | Publication | ||
| 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 |