CN202903400U - Electromagnetic induction type torque sensor - Google Patents
Electromagnetic induction type torque sensor Download PDFInfo
- Publication number
- CN202903400U CN202903400U CN 201220490022 CN201220490022U CN202903400U CN 202903400 U CN202903400 U CN 202903400U CN 201220490022 CN201220490022 CN 201220490022 CN 201220490022 U CN201220490022 U CN 201220490022U CN 202903400 U CN202903400 U CN 202903400U
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- rotating shaft
- sensor
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- iron core
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Abstract
An electromagnetic induction type torque sensor is provided, a machine casing is provided with a sensor rotation shaft, two ends of the sensor rotation shaft are thicker than a middle part of the shaft, the sensor rotation shaft is fixed with end covers through bearings, rotation operation can be carried out relative to the machine casing, the sensor rotation shaft is concentrically provided outside with an output iron core, an end of the output iron core is fixed with the sensor rotation shaft, the other end of the output iron core is fixed with the sensor rotation shaft through a bearing, and the output iron core can rotate relative to the sensor rotation shaft, the sensor rotation shaft is also concentrically provided outside with an excitation iron core, one end of the excitation iron core is fixed with the sensor rotation shaft, the other end of the excitation iron core is fixed with the output iron core through a bearing, and the excitation iron core can rotate relative to the output iron core. An excitation winding is fixed in the excitation iron core, an output winding is fixed in the output iron core, twp phase windings are both single-phase winding, and leading-out heads are connected with a conjunction box of the machine casing through a slip ring and an electric brush. In usage, two ends of the sensor rotation shaft are respectively and coaxially connected with load and power source, a sensor converts load torque into electric signals for output, the electric signals are directly matched with the load torque, and relatively high measuring precision is obtained.
Description
Technical field
The utility model relates to a kind of torque sensor, relates to more specifically a kind of new construction torque sensor based on electromagnetic induction principle.
Background technology
At present, use more torque sensor on the market and mainly contain two large classes: the first kind is obtained signal (tooth) grid formula torque sensor by magneto-electric induction.The signal of this class sensor output 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 complex structure, and volume is large, and price is high.Second largest class is the torque sensor take resistance strain gage as sensitive element.Torque makes the microdeformation meeting of axle cause that the strain resistance changes, and signal and the torque of electric bridge output are proportional.Such sensor has simple in structure, the little advantage such as lightweight of volume.Its weak point is that its measuring accuracy and paster technique is closely related, and precision is relatively low.
Summary of the invention
The utility model provides a kind of new construction torque sensor based on electromagnetic induction principle, 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.
The purpose of this utility model takes following technical proposals to realize:
A kind of induction torque sensor comprises sensor rotating shaft, casing, end cap, securing member and set bolt, field copper and iron core, output winding and iron core, bearing, terminal box, slip ring and brush, also comprises:
The sensor rotating shaft is arranged in the casing, and the sensor rotating shaft is fixed and can be made rotating operation with respect to casing by bearing and end cap; The concentric peripheral hardware output of sensor rotating shaft is unshakable in one's determination, exports an end unshakable in one's determination and fixes by set bolt and sensor rotating shaft, and the other end is fixed with the sensor rotating shaft by bearing and can be rotated relative to the sensor rotating shaft; The concentric peripheral hardware field core of sensor rotating shaft, field core one end is connected with fastening accessory, and fixes by the rotating shaft of set bolt sensor, and the other end is fixed by bearing and output iron core and can be relative to going out unshakable in one's determination the rotation;
Field core is provided with slot for winding, and field copper is fixed in the groove; The output iron core is provided with slot for winding, and the output winding is fixed in the groove; Field copper and output winding are all simplex winding, and spatially this two phase winding is vertical; Field copper is connected with the terminal box of casing with brush by slip ring with the leading-out end of being connected winding;
Described induction torque sensor, its feature one is: the two ends of described sensor rotating shaft are thicker than center section;
Described induction torque sensor, its feature two is: field copper and output winding are orthogonal, and mutual deviation is 90 ° on the space, and two phase windings and sensor rotating shaft are rotated simultaneously;
Described induction torque sensor, its feature three is: field copper is powered by AC power, and the excitation field of formation is impulsive magnetic field.
Structure described above, induction torque sensor of the present utility model, its principle of work is:
1. the measurement of static torque: field copper passes into alternating current, produces the time dependent excitation field of magnetic potential amplitude; The end that the sensor rotating shaft is stretched out is fixed, and the other end loads static torque.When static torque was zero, deformation did not occur in the sensor rotating shaft, remained unchanged with sensor rotating shaft the two ends field core of fixing and the position of exporting iron core respectively.Field copper and output winding are spatially orthogonal, and excitation field does not have interlinkage with the output winding, and the induced potential of output winding is zero; When static torque is non-vanishing, sensor rotating shaft generation deformation, the relative position of field copper and output winding changes, excitation field and output winding interlinkage, the output winding produces induced potential, and this induced potential is corresponding with the static torque that loads.
2. the measurement of dynamic torque: field copper passes into alternating current, produces the time dependent excitation field of magnetic potential amplitude; Sensor rotating shaft one end connects and joins power source, and an end connects tested load; When load torque is zero, deformation does not occur in the sensor rotating shaft, respectively with the fixing field core in sensor rotating shaft two ends and output unshakable in one's determination with sensor rotating shaft synchronous rotary, its relative position remains unchanged, excitation field does not have interlinkage with the output winding, and the induced potential of output winding is zero; When load torque is non-vanishing, sensor rotating shaft generation deformation, field copper and output winding and sensor rotating shaft synchronous rotary, change has occured in its relative position, excitation field and output winding interlinkage, the output winding produces induced potential, and this induced potential is corresponding with the load torque that loads.
Structure described above, the utility model utilize electromagnetic induction principle to consist of torque sensor, and sensor and load and the coaxial installation of power source (rotating machinery) convert load torque to electric signal output, and the electric signal of output is directly corresponding with load torque.Therefore, easy to use, can be used for the occasion of various measurement dynamic torques and static torque.
Description of drawings
Fig. 1 is the structural representation of the induction torque sensor of the utility model;
Fig. 2 is the cut-open view of the A-A face implemented of Fig. 1.
Embodiment
Further describe the architectural feature of the utility model torque sensor below in conjunction with accompanying drawing.
Fig. 1 is the structural representation of the utility model torque sensor, comprises sensor rotating shaft 1, bearing 2, front end end cover 3, casing 4, securing member 5, bearing 6, field copper 7, field core 8, output iron core 9, output winding 10, bearing 11, securing member 12, terminal box 13, rear end cap 14, brush 15, collector ring 16.
Front end end cover 3 is positioned at the front end of casing 4, and rear end cap 13 is positioned at the rear end of casing 4, and the center of front end end cover 3 and rear end cap 14 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 14.
Output unshakable in one's determination 9 is provided with slot for winding, and output winding 10 places in the groove, and the axis of output winding 10 is vertical with the axis of excitation field.
Implementation of the present utility model 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, field copper 7 places the slot for winding of field core 8, output winding 10 places the slot for winding of output unshakable in one's determination 9, the magnetic circuit in field core 8, output unshakable in one's determination 9 and air gap excitation magnetic field.Field core 8 and output unshakable in one's determination 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, casing 4, rear end cap 14 can be made of metal materials such as aluminium alloys; Field core 8 and output unshakable in one's determination 9 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; Field copper 7 and output winding 10 are electromagnetic enamel-covered wire.
Claims (5)
1. induction torque sensor comprises sensor rotating shaft, casing, end cap, fastening accessory and set bolt, field copper and iron core, output winding and iron core, bearing, slip ring and brush, it is characterized in that:
The sensor rotating shaft is arranged in the described casing, and the sensor rotating shaft is fixed by bearing and end cap, can make rotating operation with respect to casing; The concentric peripheral hardware output of sensor rotating shaft is unshakable in one's determination, exports an end unshakable in one's determination and is connected with fastening accessory, fixes by set bolt and sensor rotating shaft again, and the other end is fixed with the sensor rotating shaft by bearing and can be rotated relative to the sensor rotating shaft; The sensor rotating shaft is outer with one heart establishes field core in addition, and field core one end is connected with fastening accessory, fixes by set bolt and sensor rotating shaft again, and the other end is fixed by bearing and output iron core and can be relative to exporting unshakable in one's determination the rotation;
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;
Described field core is provided with slot for winding, and field copper is fixed in the groove; The output winding is provided with slot for winding, and the output winding is fixed in the groove; Field copper and output winding are all single-phase winding; Field copper is connected with the terminal box of casing with brush by slip ring with the leading-out end of being connected winding.
2. induction torque sensor according to claim 1, it is characterized in that: the two ends of described sensor rotating shaft are thicker than center section.
3. induction torque sensor according to claim 1 is characterized in that: field copper and output winding are orthogonal, and mutual deviation is 90 ° on the space, and two phase windings and sensor rotating shaft are rotated simultaneously.
4. induction torque sensor according to claim 1, it is characterized in that: field copper is powered by AC power, and the excitation field of formation is impulsive magnetic field.
5. induction torque sensor according to claim 1 is characterized in that: field core and output are unshakable in one's determination adopts fe-Ni soft magnetic alloy sheet or the punching of high magnetic conductivity siliconized plate of high magnetic permeability to laminate formation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220490022 CN202903400U (en) | 2012-09-14 | 2012-09-14 | Electromagnetic induction type torque sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220490022 CN202903400U (en) | 2012-09-14 | 2012-09-14 | Electromagnetic induction type torque sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202903400U true CN202903400U (en) | 2013-04-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220490022 Expired - Fee Related CN202903400U (en) | 2012-09-14 | 2012-09-14 | Electromagnetic induction type torque sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202903400U (en) |
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 |
| CN105333982A (en) * | 2015-11-26 | 2016-02-17 | 哈尔滨力盛达机电科技有限公司 | Vertical non-contact electromagnetic induction torque sensor applied to car EPS system |
-
2012
- 2012-09-14 CN CN 201220490022 patent/CN202903400U/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 |
| CN105333982A (en) * | 2015-11-26 | 2016-02-17 | 哈尔滨力盛达机电科技有限公司 | Vertical non-contact electromagnetic induction torque sensor applied to car EPS system |
| CN105333982B (en) * | 2015-11-26 | 2017-10-27 | 哈尔滨力盛达机电科技有限公司 | A kind of vertical non-contact electromagnetic induced torque sensor for automobile EPS |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130424 Termination date: 20130914 |