CN103323158A - Brushless type torque sensor based on Hall effect - Google Patents
Brushless type torque sensor based on Hall effect Download PDFInfo
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- CN103323158A CN103323158A CN2013102625440A CN201310262544A CN103323158A CN 103323158 A CN103323158 A CN 103323158A CN 2013102625440 A CN2013102625440 A CN 2013102625440A CN 201310262544 A CN201310262544 A CN 201310262544A CN 103323158 A CN103323158 A CN 103323158A
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Abstract
A brushless type torque sensor based on the Hall effect comprises a sensor rotating shaft, a machine seat, a front end cap, a rear end cap, an excitation sleeve, an excitation iron core, permanent magnet magnetic steel, an output sleeve, an output iron core, a Hall element, an ring transformer, fasteners and a supporting bearing, wherein the sensor rotating shaft, the front end cap and the rear end cap are fixed together through a bearing, the sensor rotating shaft can rotate relative to the machine seat, the excitation sleeve is concentrically arranged outside the rotating shaft, the excitation iron core and the permanent magnet magnetic steel are fixed outside the excitation sleeve, the output sleeve is additionally and concentrically arranged outside the sensor rotating shaft, the output iron core and the Hall element are fixed inside the output sleeve, and the excitation sleeve and the output sleeve are fixed on the two sides of the sensor rotating shaft respectively through fasteners. A power source and an output leading wire of the Hall element are respectively connected with each inner ring winding of the ring transformer via through holes, and each outer ring winding of the ring transformer is connected with a junction box. When the brushless type torque sensor based on the Hall effect is used, the two ends of the sensor rotating shaft are and coaxially connected with load and a power source respectively, a sensor converts a load torque into a corresponding analog signal and outputs the analog signal, and therefore the brushless type torque sensor based on the Hall effect is higher in measuring precision.
Description
Technical field
The present invention relates to a kind of torque sensor, relate to more specifically a kind of brushless torque sensor based on Hall effect.
Background technology
At present in torque measurement, transmitting the class torque sensor uses very extensive, transmission class torque sensor can be divided into optical profile type, photo-electric, magneto-electric, strain-type, condenser type etc. by the producing method of dtc signal, and wherein ripe torque sensor mainly is magneto-electric and strain-type on the market.The magneto-electric torque sensor obtains dtc signal by magneto-electric induction, Germany HBM company, Japan are little wildly to survey device and all there is production in Chinese western Hunan instrucment and meter plant, the essence of sensor output signal is the angular displacement signal that two-way has phase differential, need to carry out combined treatment to signal and just can obtain moment information.It is non-contacting sensor, without wearing and tearing, without friction, can be used for long-term measurement, and weak point is that volume is large, is difficult for installing, and can not measure static moment of torsion; Strain gauge torque transducer is take resistance strain gage as sensitive element, T1 such as German HBM company, T2, the JN338 series sensor of T4 series torque sensor, Beijing three brilliant groups etc., they install four precise resistance/strain sheets in rotating shaft or the elastic shaft that is connected in series with rotating shaft, and connect into the Hui Sidun electric bridge, and torque makes the microdeformation of axle cause that the strain resistance changes, and signal and the torque of electric bridge output are proportional.Sensor can be measured Static and dynamic torque, high-frequency percussion and vibration information, has the little advantage such as lightweight of volume, weak point be the transmission of signal easily be disturbed and loss larger, it is not very high causing measuring accuracy.
Summary of the invention
The invention provides a kind of brushless torque sensor based on Hall effect, the coaxial connection load of difference of sensor rotating shaft two ends and power source during use, sensor converts load torque to electric signal output, this electric signal is directly corresponding with load torque, precision is higher, and can measure static torque or the dynamic torque of rotary system.
Purpose of the present invention takes following technical proposals to realize:
A kind of torque sensor based on Hall effect, comprise support, be positioned at the front end end cover of support front end, be positioned at the rear end cap of support rear end, pass the sensor rotating shaft at front end end cover and rear end cap center, the sensor rotating shaft is fixed with front and rear cover respectively by bearing, can be relatively and support rotate, in addition, also comprise:
Excitatory sleeve, with placing in the support of sensor rotating shaft concentric, the excitatory sleeve outside is provided with protruding key, field core is fixed on the protruding key, there is the gap between the field core, permanent magnetic steel is installed in the gap, adopts anaerobic adhesive that permanent magnetic steel and field core is even glutinous, and permanent magnetic steel and field core are rotated simultaneously with the sensor rotating shaft;
The output sleeve, with placing in the support of sensor rotating shaft, field core concentric, output sleeve inboard is provided with groove, the output iron core is fixed in the groove, have the gap between the output iron core, Hall element is installed in the gap, adopts anaerobic adhesive with Hall element and output glutinous company the unshakable in one's determination, Hall element rotates with the sensor rotating shaft simultaneously with output is unshakable in one's determination, and the output sleeve is provided with via hole;
Securing member is used for respectively field core sleeve and output sleeve unshakable in one's determination and sensor rotating shaft two ends being fixed, and is provided with via hole in the securing member;
Toroidal transformer, for a pair of, ring is unshakable in one's determination in each fixes with the sensor rotating shaft, rotates with the sensor rotating shaft together, is provided with slot for winding, and each outer shroud is unshakable in one's determination to be fixed with support, is provided with slot for winding;
The power supply of Hall element, output lead link to each other around group via in each of output sleeve via hole, securing member via hole and a pair of toroidal transformer respectively, and each outer shroud winding of a pair of toroidal transformer is connected with terminal box.
Structure described above, the torque sensor based on Hall effect of the present invention, its principle of work is:
1. the measurement of static torque: the outer shroud winding of toroidal transformer one passes into alternating current, it is interior around group generation induced potential to pass through magneto-electric induction, because the power supply lead wire of Hall element consists of closed-loop path with the interior of toroidal transformer one around organizing to link to each other by the via hole of output sleeve, then passes into exchange current in the Hall element.The permanent magnetic steel that embeds in field core produces the stationary magnetic field, via field core, air-gap and the output closed-loop path that forms unshakable in one's determination.The end that the sensor rotating shaft is stretched out is fixed, and the other end loads static torque.When static torque is zero, deformation does not occur in the sensor rotating shaft, remain unchanged with sensor rotating shaft the two ends excitatory sleeve of fixing and the initial position of exporting sleeve respectively, be fixed in the permanent magnetic steel of excitatory sleeve and be fixed in the Hall element of exporting the iron sleeve, its initial position is 45 ° of mechanical angles of mutual deviation spatially, the excitatory magnetic field direction that permanent magnetic steel forms is parallel with the direction of current in passing into Hall element, so the output voltage of each Hall element is zero; When static torque is non-vanishing, sensor rotating shaft generation deformation, the initial relative position of permanent magnetic steel and Hall element changes, there is angle in direction of current in excitatory magnetic field direction and each Hall element, then the output voltage of each Hall element is non-vanishing, and be alternating voltage, because the output lead of Hall element is by the via hole of securing member, consist of the closed-loop path with the interior of toroidal transformer two around group, then there is exchange current in the interior of toroidal transformer two around group, outer shroud winding through magneto-electric induction toroidal transformer two produces induced potential again, and this induced potential is corresponding with the static torque that the sensor rotating shaft loads.
2. the measurement of dynamic torque: the outer shroud winding of toroidal transformer one passes into alternating current, it is interior around group generation induced potential to pass through magneto-electric induction, because the power supply lead wire of Hall element consists of closed-loop path with the interior of toroidal transformer one around organizing to link to each other by the via hole of output sleeve, then passes into exchange current in the Hall element.The permanent magnetic steel that embeds in field core produces the stationary magnetic field, via field core, air-gap and the output closed-loop path that forms unshakable in one's determination.The termination propulsion system that the sensor rotating shaft is stretched out, the other end loads dynamic torque.When the dynamic torque square is zero, deformation does not occur in the sensor rotating shaft, respectively with fixing excitatory sleeve and the output sleeve in sensor rotating shaft two ends, and the interior ring iron core of toroidal transformer rotates with the sensor rotating shaft, be fixed in the permanent magnetic steel of excitatory sleeve and be fixed in the Hall element of exporting sleeve, its initial position is 45 ° of mechanical angles of mutual deviation spatially, and the excitatory magnetic field direction is parallel with the direction of current in passing into each Hall element, so the output voltage of each Hall element is zero; When dynamic torque is non-vanishing, sensor rotating shaft generation deformation, the initial relative position of permanent magnetic steel and each Hall element changes, there is angle in the direction of current of excitatory magnetic field direction and each Hall element, then the output voltage of each Hall element is non-vanishing, and be alternating voltage, because the output lead of Hall element is by the via hole of securing member, consist of the closed-loop path with the interior of toroidal transformer two around group, then there is exchange current in the interior of toroidal transformer two around group, outer shroud winding through magneto-electric induction toroidal transformer two produces induced potential again, and this induced potential is corresponding with the dynamic torque that the sensor rotating shaft loads.
Structure described above, the Novel torque sensor that the present invention utilizes Hall effect to consist of, sensor and load and the coaxial installation of power source (rotating machinery) convert load torque to the electric signal output of Hall element, and the electric signal of output is directly corresponding with load torque.Therefore, this sensor is easy to use, can be used for the occasion of various measurement static torque and dynamic torque.
Description of drawings
Fig. 1 is the structural representation that the present invention is based on the Novel torque sensor of Hall effect;
Fig. 2 is the cut-open view of the A-A face implemented of Fig. 1;
Fig. 3 is the principle of work schematic diagram that Fig. 1 implements.
Embodiment
Further describe the architectural feature of torque sensor of the present invention below in conjunction with accompanying drawing.
Fig. 1 is the structural representation of torque sensor of the present invention, comprises that the interior ring iron core of the outer shroud iron core of sensor rotating shaft 1, bearing 2, front end end cover 3, terminal box 4, toroidal transformer one and winding 5, toroidal transformer one and winding 6, securing member 7, bearing 8, output sleeve 9, output are unshakable in one's determination 10, Hall element 11, permanent magnetic steel 12, field core 13, excitatory sleeve 14, bearing 15, securing member 16, toroidal transformer two interior ring iron cores and winding 17, toroidal transformer two outer shroud iron cores and winding 18, rear end cap 19, support 20.
Front end end cover 3 is positioned at the front end of support 20, and rear end cap 19 is positioned at the rear end of support 20, and the center of front end end cover 3 and rear end cap 19 is passed in sensor rotating shaft 1, and bearing 2 places respectively between sensor rotating shaft 1 and front end end cover 3 and the rear end cap 19.
The both sides of sensor rotating shaft 1 are fixed with the interior ring unshakable in one's determination 6 of toroidal transformer one and the interior ring unshakable in one's determination 17 of toroidal transformer two respectively, can rotate simultaneously.
The outer shroud unshakable in one's determination 18 of the outer shroud of toroidal transformer one unshakable in one's determination 5 and toroidal transformer two is fixing with support 20.
The excitatory sleeve 14 of sensor rotating shaft 1 concentric peripheral hardware, field core 13 is fixed on the protruding key in excitatory sleeve 14 outsides, there is the gap between the field core 13, permanent magnetic steel 12 is fixed in the gap, and adopt anaerobic adhesive with field core 13 and 12 glutinous companies of permanent magnetic steel, excitatory sleeve 14 1 ends and securing member 7 are fixing, and fixing with set bolt and sensor rotating shaft 1 again, the other end contacts and can rotate relative to sensor rotating shaft 1 with sensor rotating shaft 1 by bearing 15.
The power outlet of Hall element 11 is at first by exporting the via hole of sleeve 9, link to each other with the interior ring of toroidal transformer one winding 6 unshakable in one's determination, the output lead of Hall element 11 is by the via hole of securing member 16, link to each other with the interior ring of toroidal transformer two winding 17 unshakable in one's determination, toroidal transformer one outer winding 5 unshakable in one's determination is connected outer winding unshakable in one's determination 18 and is connected with terminal box 4 on being fixed on support 20 with toroidal transformer.
Implementation of the present invention is as shown in Figure 2: Fig. 2 is the cut-open view of the A-A face of torque sensor structural representation Fig. 1, permanent magnetic steel 12 and field core 13 are fixed on the excitatory sleeve 14, adopt anaerobic adhesive mutually even glutinous, Hall element 11 and output unshakable in one's determination 10 are fixed on the inboard of output unshakable in one's determination 9, adopt anaerobic adhesive mutually even glutinous, field core 10, output unshakable in one's determination 14 and air gap consist of the magnetic circuit of excitatory magnetic field, excitatory sleeve 14 and output sleeve 9 and sensor rotating shaft 1 concentric.
The material of sensor rotating shaft 1 is the materials such as carbon steel or alloy steel; Front end end cover 3, securing member 7, securing member 16, rear end cap 19, support 20 adopt hard aluminium alloy to make; Excitatory sleeve 14, output sleeve 9 adopt brass to make; Toroidal transformer inner and outer rings iron core, field core 13 and output unshakable in one's determination 10 are to be laminated by the fe-Ni soft magnetic alloy sheet of high magnetic permeability or the punching of high magnetic conductivity siliconized plate to consist of; Permanent magnetic steel 12 is made by rare earth rubidium iron boron sintering.
Torque sensor principle of work schematic diagram among Fig. 1 of the present invention is as shown in Figure 3: when the sensor rotating shaft is not subject to load torque or torsional interaction, the relative position of permanent magnetic steel 12 and Hall element 11 is shown in Fig. 3 (a), wherein dotted line represents the magnetic field line that permanent magnetic steel 12 forms, the equivalent measuring figure of Fig. 3 (a) is shown in Fig. 3 (b), the magnetic direction that permanent magnetic steel 12 forms is parallel with the direction that Hall element 11 passes into alternating current, so the output voltage of Hall element 11 is zero at this moment.
When the sensor rotating shaft is subject to load torque or torsional interaction, the relative position of permanent magnetic steel 12 and Hall element 11 is shown in Fig. 3 (c), wherein dotted line represents the magnetic field line that permanent magnetic steel 12 forms, the equivalent measuring figure of Fig. 3 (c) is shown in Fig. 3 (d), there is angle in the direction that the magnetic direction that permanent magnetic steel 12 forms and Hall element 11 pass into alternating current, suppose that the direction of this moment alternating current i is shown in Fig. 3 (d), according to electrical conductor rule in the hand in magnetic field, the voltage direction that each Hall element 11 produces is shown in Fig. 3 (d), for making the voltage maximum of four Hall element outputs, the connecting line of each Hall element 11 is shown in Fig. 3 (d), and the output voltage of Hall element is e
Ab, the interior of the output lead of Hall element 11 and toroidal transformer two forms the closed-loop path around group, in the loop because e
AbExistence and produce exchange current, according to the magneto-electric induction principle, the outer shroud winding of toroidal transformer two produces corresponding induced potential, is drawn by the terminal box that is fixed on the sensor support.
Claims (10)
1. brushless torque sensor based on Hall effect, comprise support, be positioned at the front end end cover of support front end, be positioned at the rear end cap of support rear end, pass the sensor rotating shaft at front end end cover and rear end cap center, the sensor rotating shaft is fixed with front and rear cover respectively by bearing, and support rotates relatively, in addition, also comprise:
Excitatory sleeve, with placing in the support of sensor rotating shaft concentric, the outside is provided with protruding key, and field core is fixed on the protruding key;
The output sleeve, with placing in the support of sensor rotating shaft, excitatory sleeve concentric, the inboard is provided with caulking groove, and the output iron core is fixed in the caulking groove;
Securing member is used for respectively the two ends of excitatory sleeve and output sleeve and sensor rotating shaft being fixed;
Toroidal transformer, interior ring is unshakable in one's determination to be fixed with the sensor rotating shaft, rotates with the sensor rotating shaft together, is provided with slot for winding, and its outer shroud is unshakable in one's determination to be fixed with support, is provided with slot for winding;
End cap is exposed at the two ends of described sensor rotating shaft, and an end connects power source, and the other end connects tested load, and the two ends of sensor rotating shaft are thicker than center section.
2. torque sensor according to claim 1, it is characterized in that: excitatory sleeve one end is connected with securing member, fix by set bolt and sensor rotating shaft again, the other end by bearing with sensor rotating shaft contact and can rotate relative to the sensor rotating shaft.
3. torque sensor according to claim 1, it is characterized in that: have the gap between the field core, permanent magnetic steel is installed in the gap, adopts anaerobic adhesive that permanent magnetic steel and field core is even glutinous, and permanent magnetic steel and field core are rotated simultaneously with the sensor rotating shaft.
4. torque sensor according to claim 1 is characterized in that: output sleeve one end is connected with securing member, fixes by set bolt and sensor rotating shaft again, and the other end contacts and can rotate relative to excitatory sleeve with excitatory sleeve by bearing.
5. torque sensor according to claim 1, it is characterized in that: have the gap between the output iron core, Hall element is installed in the gap, adopts anaerobic adhesive with Hall element and output glutinous company the unshakable in one's determination, and Hall element rotates with the sensor rotating shaft simultaneously with output is unshakable in one's determination.
6. torque sensor according to claim 1, it is characterized in that: toroidal transformer is a pair of, lay respectively at the both sides of sensor rotating shaft, the inner and outer rings winding is individually fixed in the slot for winding of interior ring iron core and outer shroud iron core, the extension line of each outer shroud winding is connected in the terminal box of fixing with support, respectively in order to connect AC power and output electrical signals.
7. torque sensor according to claim 1, it is characterized in that: be provided with via hole in output iron core and the securing member, export the interior power supply lead wire around group and Hall element that via hole unshakable in one's determination is used for abutment ring shape transformer one, the securing member via hole is used for the interior output lead around group and Hall element of abutment ring shape transformer two.
8. torque sensor according to claim 1, it is characterized in that: the electric current that passes in the Hall element is alternating current.
9. torque sensor according to claim 1 is characterized in that: excitatory sleeve and output sleeve adopt brass to make, and field core and output are unshakable in one's determination all adopts the fe-Ni soft magnetic alloy sheet of high magnetic permeability or the punching of high magnetic conductivity siliconized plate to laminate formation.
10. torque sensor according to claim 1, it is characterized in that: permanent magnetic steel is made by rare earth rubidium iron boron sintering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102625440A CN103323158A (en) | 2013-06-21 | 2013-06-21 | Brushless type torque sensor based on Hall effect |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102625440A CN103323158A (en) | 2013-06-21 | 2013-06-21 | Brushless type torque sensor based on Hall effect |
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| CN103323158A true CN103323158A (en) | 2013-09-25 |
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| CN2013102625440A Pending CN103323158A (en) | 2013-06-21 | 2013-06-21 | Brushless type torque sensor based on Hall effect |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103968984A (en) * | 2014-05-13 | 2014-08-06 | 嘉兴学院 | Self-compensating brushless differential type torque sensor |
| CN104122020A (en) * | 2014-08-06 | 2014-10-29 | 嘉兴学院 | Field programmable gate array (FPGA) based induction phase shift type torque measurement system |
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| JPS56103336A (en) * | 1980-01-23 | 1981-08-18 | Hitachi Ltd | Apparatus for measuring torque ripple of rotator |
| CN101024416A (en) * | 2005-12-21 | 2007-08-29 | 西南大学 | Electric bicycle drive sensing device |
| CN101750175A (en) * | 2010-01-04 | 2010-06-23 | 武汉理工大学 | Torque sensor for detecting single-end deformation of torque rod |
| CN201828366U (en) * | 2010-08-31 | 2011-05-11 | 杭州飞越汽车零部件有限公司 | Non-contact torque measurement device |
| CN202008417U (en) * | 2011-03-31 | 2011-10-12 | 比亚迪股份有限公司 | Non-contact torque sensing device |
| CN202903400U (en) * | 2012-09-14 | 2013-04-24 | 嘉兴学院 | Electromagnetic induction type torque sensor |
| CN203323933U (en) * | 2013-06-21 | 2013-12-04 | 嘉兴学院 | Brushless torque sensor based on Hall effect |
-
2013
- 2013-06-21 CN CN2013102625440A patent/CN103323158A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56103336A (en) * | 1980-01-23 | 1981-08-18 | Hitachi Ltd | Apparatus for measuring torque ripple of rotator |
| CN101024416A (en) * | 2005-12-21 | 2007-08-29 | 西南大学 | Electric bicycle drive sensing device |
| CN101750175A (en) * | 2010-01-04 | 2010-06-23 | 武汉理工大学 | Torque sensor for detecting single-end deformation of torque rod |
| CN201828366U (en) * | 2010-08-31 | 2011-05-11 | 杭州飞越汽车零部件有限公司 | Non-contact torque measurement device |
| CN202008417U (en) * | 2011-03-31 | 2011-10-12 | 比亚迪股份有限公司 | Non-contact torque sensing device |
| CN202903400U (en) * | 2012-09-14 | 2013-04-24 | 嘉兴学院 | Electromagnetic induction type torque sensor |
| CN203323933U (en) * | 2013-06-21 | 2013-12-04 | 嘉兴学院 | Brushless torque sensor based on Hall effect |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103968984A (en) * | 2014-05-13 | 2014-08-06 | 嘉兴学院 | Self-compensating brushless differential type torque sensor |
| CN103968984B (en) * | 2014-05-13 | 2017-01-11 | 嘉兴学院 | Self-compensating brushless differential type torque sensor |
| CN104122020A (en) * | 2014-08-06 | 2014-10-29 | 嘉兴学院 | Field programmable gate array (FPGA) based induction phase shift type torque measurement system |
| CN104122020B (en) * | 2014-08-06 | 2018-05-08 | 嘉兴学院 | Sensing phase shift torch measuring system based on FPGA |
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Application publication date: 20130925 |