CN203323933U - Brushless torque sensor based on Hall effect - Google Patents
Brushless torque sensor based on Hall effect Download PDFInfo
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- CN203323933U CN203323933U CN2013203756420U CN201320375642U CN203323933U CN 203323933 U CN203323933 U CN 203323933U CN 2013203756420 U CN2013203756420 U CN 2013203756420U CN 201320375642 U CN201320375642 U CN 201320375642U CN 203323933 U CN203323933 U CN 203323933U
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Abstract
The utility model relates to a brushless torque sensor based on a Hall effect. The brushless torque sensor based on the Hall effect comprises a sensor rotation shaft, a support, a front and back end cap, an excitation sleeve, excitation cores, permanent magnetic steels, an output sleeve, output cores, Hall elements, a ring-shaped transformer, fasteners and a matching bearing, wherein the sensor rotation shaft is fixed with the front and back end cap through a bearing and can rotate relative to the support, the sensor rotation shaft is externally provided with the excitation sleeve concentrically, the excitation cores and the permanent magnetic steels are fixed at an outer side of the excitation sleeve, the sensor rotation shaft is further externally provided with the output sleeve concentrically, the output cores and the Hall elements are fixed at an inner side of the output sleeve, the excitation sleeve and the output sleeve are respectively fixed at two sides of the sensor rotation shaft through the fasteners, power sources and output leading wires of the Hall elements are respectively connected with each inner-ring winding of the ring-shaped transformer through through-holes, and each outer-ring winding of the ring-shaped transformer is respectively connected with a wiring box. During use, two ends of the sensor rotation shaft are coaxially connected with a load and a power source respectively, a load torque is converted by a sensor into a corresponding simulation electrical signal which is outputted, and the brushless torque sensor based on the Hall effect has relatively high 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, transmit the application of class torque sensor 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 on market, more ripe torque sensor is mainly magneto-electric and strain-type.The magneto-electric torque sensor obtains dtc signal by magneto-electric induction, Germany HBM company, Japan are little wildly surveys 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 be take resistance strain gage as sensitive element, T1 as German HBM company, T2, the JN338 series sensor of T4 series torque sensor, Beijing San Jing group etc., they install four precise resistance/strain sheets on 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, during use, sensor rotating shaft two ends coaxially connect respectively load and power source, 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, through 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 being placed in support of sensor rotating shaft concentric, the excitatory sleeve outside is provided with protruding key, field core is fixed on protruding key, there is gap between field core, permanent magnetic steel is arranged in gap, adopts anaerobic adhesive that permanent magnetic steel and field core are adhered, and permanent magnetic steel and field core are rotated with the sensor rotating shaft simultaneously;
The output sleeve, with being placed in support of sensor rotating shaft, field core concentric, output sleeve inboard is provided with groove, the output iron core is fixed in groove, have gap between the output iron core, Hall element is arranged in gap, adopts anaerobic adhesive that Hall element and output iron core are adhered, Hall element rotates with the sensor rotating shaft with output is unshakable in one's determination simultaneously, and the output sleeve is provided with via hole;
Securing member, for respectively field core sleeve and output sleeve unshakable in one's determination and sensor rotating shaft two ends being fixed, and be provided with via hole in securing member;
Toroidal transformer, for a pair of, in each, ring is unshakable in one's determination fixes with the sensor rotating shaft, with the sensor rotating shaft, rotates 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 are connected 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, via hole due to the power supply lead wire of Hall element by the output sleeve and toroidal transformer one interior around the group formation closed-loop path that is connected, pass into exchange current in Hall element.The permanent magnetic steel embedded in field core produces 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, with sensor rotating shaft the two ends excitatory sleeve of fixing and the initial position of exporting sleeve, remain unchanged 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, the output voltage of each Hall element is non-vanishing, and be alternating voltage, due to the output lead of Hall element by the via hole of securing member, form closed-loop path with the interior of toroidal transformer two around group, 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, 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, via hole due to the power supply lead wire of Hall element by the output sleeve and toroidal transformer one interior around the group formation closed-loop path that is connected, pass into exchange current in Hall element.The permanent magnetic steel embedded in field core produces 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 together 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, the output voltage of each Hall element is non-vanishing, and be alternating voltage, due to the output lead of Hall element by the via hole of securing member, form closed-loop path with the interior of toroidal transformer two around group, 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, 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 form, 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.
The accompanying drawing explanation
Fig. 1 is the structural representation that the present invention is based on the Novel torque sensor of Hall effect;
The cut-open view that Fig. 2 is the A-A face implemented of Fig. 1;
Fig. 3 (a) is not permanent magnetic steel and Hall element relative position schematic diagram during torque suspension of sensor axis;
The equivalent measuring schematic diagram that Fig. 3 (b) is Fig. 3 (a);
Fig. 3 (c) is permanent magnetic steel and Hall element relative position schematic diagram while for sensor axis, being subject to torque;
The equivalent measuring schematic diagram that Fig. 3 (d) is Fig. 3 (c).
Embodiment
Further describe the architectural feature of torque sensor of the present invention below in conjunction with accompanying drawing.
The structural representation that Fig. 1 is torque sensor of the present invention, comprise 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, the interior ring iron core of toroidal transformer two 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 sensor rotating shaft 1 is through front end end cover 3 and rear end cap 19De center, and bearing 2 is placed in respectively between sensor rotating shaft 1 and front end end cover 3 and 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 the concentric peripheral hardware of sensor rotating shaft 1, field core 13 is fixed on the protruding key in excitatory sleeve 14 outsides, there is gap between field core 13, permanent magnetic steel 12 is fixed in gap, and adopt anaerobic adhesive that field core 13 and permanent magnetic steel 12 are adhered, excitatory sleeve 14 1 ends and securing member 7 are fixing, more fixing with set bolt and sensor rotating shaft 1, and the other end contacts and can rotate relative to sensor rotating shaft 1 with sensor rotating shaft 1 by bearing 15.
The concentric peripheral hardware output of sensor rotating shaft 1 sleeve 9, the inboard of output sleeve 9 is fixed in output unshakable in one's determination 10, there is gap between output unshakable in one's determination 10, Hall element 11 is fixed in gap, and the employing anaerobic adhesive will export iron core 10 and Hall element 11 is adhered, output sleeve 9 one ends and securing member 16 are fixing, more fixing with set bolt and sensor rotating shaft 1, the other end contacts and can rotate relative to excitatory sleeve 14 with excitatory sleeve 14 by bearing 8, and output sleeve 9 is provided with via hole.
The power outlet of Hall element 11 is at first by the via hole of output sleeve 9, with the interior ring of toroidal transformer one winding 6 unshakable in one's determination, be connected, the output lead of Hall element 11 is by the via hole of securing member 16, with the interior ring of toroidal transformer two winding 17 unshakable in one's determination, be connected, the outer winding 5 unshakable in one's determination of toroidal transformer one is connected with the terminal box 4 on being fixed on support 20 with the outer winding 18 unshakable in one's determination of toroidal transformer two.
Specific embodiment of the invention is as shown in Figure 2: the cut-open view of the A-A face that Fig. 2 is torque sensor structural representation Fig. 1, permanent magnetic steel 12 and field core 13 are fixed on excitatory sleeve 14, adopt anaerobic adhesive mutually to be adhered, 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 to be adhered, field core 10, output unshakable in one's determination 14 and air gap form 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 and formed by the fe-Ni soft magnetic alloy sheet of high magnetic permeability or the punching of high magnetic conductivity siliconized plate; Permanent magnetic steel 12 is made by rare earth rubidium iron boron sintering.
Torque sensor principle of work in Fig. 1 of the present invention is as shown in Fig. 3 (a), 3 (b), 3 (c), 3 (d): 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 as 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 as 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 now the output voltage of Hall element 11 is zero.
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 as 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 as 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 as shown in Fig. 3 (d), according to electrical conductor rule in hand in magnetic field, the voltage direction that each Hall element 11 produces is as shown in Fig. 3 (d), for making the voltage maximum of four Hall element outputs, the connecting line of each Hall element 11 is as shown in Fig. 3 (d), the output voltage of Hall element is e
ab, the interior of the output lead of Hall element 11 and toroidal transformer two forms closed-loop path around group, in loop due to 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, by the terminal box be fixed on the sensor support, is drawn.
Claims (10)
1. the 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, through 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 being placed in support of sensor rotating shaft concentric, the outside is provided with protruding key, and permanent magnetic steel and field core are fixed on the excitatory sleeve outside;
The output sleeve, with being placed in support of sensor rotating shaft, excitatory sleeve concentric, inboard is provided with caulking groove, and Hall element and output iron core are fixed on output sleeve inboard;
Securing member, for fixing the two ends of excitatory sleeve and output sleeve and sensor rotating shaft respectively;
Toroidal transformer, interior ring is unshakable in one's determination to be fixed with the sensor rotating shaft, with the sensor rotating shaft, rotates 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, then fixes by set bolt and sensor rotating shaft, 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 gap between field core, permanent magnetic steel is arranged in gap, adopts anaerobic adhesive that permanent magnetic steel and field core are adhered, and permanent magnetic steel and field core are rotated with the sensor rotating shaft simultaneously.
4. torque sensor according to claim 1 is characterized in that: output sleeve one end is connected with securing member, then fixes by set bolt and sensor rotating shaft, 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: between the output iron core, have gap, Hall element is arranged in gap, adopts anaerobic adhesive that Hall element and output iron core are adhered, and Hall element rotates with the sensor rotating shaft with output is unshakable in one's determination simultaneously.
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 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: in output iron core and securing member, be provided with via hole, export the interior power supply lead wire around group and Hall element of via hole unshakable in one's determination for abutment ring shape transformer one, the securing member via hole is 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 passed in 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 |
|---|---|---|---|
| CN2013203756420U CN203323933U (en) | 2013-06-21 | 2013-06-21 | Brushless torque sensor based on Hall effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203756420U CN203323933U (en) | 2013-06-21 | 2013-06-21 | Brushless torque sensor based on Hall effect |
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| Publication Number | Publication Date |
|---|---|
| CN203323933U true CN203323933U (en) | 2013-12-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013203756420U Expired - Fee Related CN203323933U (en) | 2013-06-21 | 2013-06-21 | Brushless torque sensor based on Hall effect |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103323158A (en) * | 2013-06-21 | 2013-09-25 | 嘉兴学院 | Brushless type torque sensor based on Hall effect |
| 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 |
-
2013
- 2013-06-21 CN CN2013203756420U patent/CN203323933U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103323158A (en) * | 2013-06-21 | 2013-09-25 | 嘉兴学院 | Brushless type torque sensor based on Hall effect |
| 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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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131204 Termination date: 20140621 |
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| EXPY | Termination of patent right or utility model |