CN113465801A - Non-contact magnetic coupling torque sensor - Google Patents
Non-contact magnetic coupling torque sensor Download PDFInfo
- Publication number
- CN113465801A CN113465801A CN202110933586.7A CN202110933586A CN113465801A CN 113465801 A CN113465801 A CN 113465801A CN 202110933586 A CN202110933586 A CN 202110933586A CN 113465801 A CN113465801 A CN 113465801A
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- circuit board
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- stator
- rotating shaft
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- 230000008878 coupling Effects 0.000 title claims abstract description 21
- 238000010168 coupling process Methods 0.000 title claims abstract description 21
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 21
- 230000003321 amplification Effects 0.000 claims description 4
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 150000003071 polychlorinated biphenyls Chemical class 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/02—Rotary-transmission dynamometers
- G01L3/04—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft
- G01L3/10—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating
- G01L3/101—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving magnetic or electromagnetic means
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The invention relates to the technical field of torque sensors, in particular to a non-contact magnetic coupling torque sensor, which comprises a stator, a rotor and a rotating shaft, wherein the rotating shaft is used for being connected with an external driving mechanism; the end face, close to the stator, of the rotor is provided with a first circuit board, the end face, close to the rotor, of the stator is provided with a second circuit board, and magnetic coupling is formed between the first circuit board and the second circuit board. The invention aims to provide a non-contact magnetic coupling torque sensor, which solves the problem that the traditional non-contact torque sensor is low in precision and reliability.
Description
Technical Field
The invention relates to the technical field of torque sensors, in particular to a non-contact magnetic coupling torque sensor.
Background
At present, torque sensors are classified into two categories, namely dynamic torque sensors and static torque sensors, wherein the dynamic torque sensors can be called torque sensors, torque rotating speed sensors, non-contact torque sensors, rotating torque sensors and the like, the torque sensors are used for detecting torsion torque on various rotating or non-rotating mechanical parts, and the torque sensors convert physical changes of torsion into accurate electric signals. The non-contact torque sensor consists of a stator and a rotor, and the sensor is arranged on the rotor; through a coil coupling mode, the stator wirelessly supplies power to the rotor, and the rotor wirelessly transmits data to the stator; the stator and the rotor are both provided with coils, and the coils (enameled wires) are wound on a special framework (made of aluminum, iron or magnetic materials); because the winding coil is high in cost, difficult to install, large in occupied space and large in framework weight, the rotating inertia of the rotating shaft is large, and the measuring accuracy and reliability of the sensor are affected.
Disclosure of Invention
In order to overcome the defects and shortcomings in the prior art, the invention aims to provide a non-contact magnetic coupling torque sensor, which solves the problem that the traditional non-contact torque sensor is low in precision and reliability.
The invention is realized by the following technical scheme:
a non-contact magnetic coupling torque sensor comprises a stator, a rotor and a rotating shaft, wherein the rotating shaft is used for being connected with an external driving mechanism, the rotor is coaxially and rotatably connected with the rotating shaft, and the stator and the rotor are arranged at intervals; the end face, close to the stator, of the rotor is provided with a first circuit board, the end face, close to the rotor, of the stator is provided with a second circuit board, and magnetic coupling is formed between the first circuit board and the second circuit board.
The stator and the rotor are both in a cylinder structure.
The other end face of the rotor extends outwards to form a protruding part, and the side wall of the protruding part is provided with a plurality of through holes arranged at equal intervals; and a counting assembly for detecting the through holes is arranged above the rotating shaft.
Wherein the counting assembly is a reflective optical sensor.
Wherein, one side of the stator is provided with a groove.
The sensor further comprises a shell, two bearings are arranged on the shell, and the bearings are respectively sleeved at two ends of the rotating shaft.
The sensor also comprises a third circuit board, wherein the third circuit board is provided with an electric connector electrically connected with the third circuit board; the third circuit board is electrically connected with the second circuit board.
And a sealing ring is arranged between the electric connecting port and the shell.
Wherein, the pivot is equipped with the ground connection piece that is used for ground connection.
Wherein, the grounding piece is a screw.
The first circuit board comprises a first coil, a modulation and demodulation module, a pressure sensor, an amplification module and a wireless transmitting module, and the second circuit board comprises a second coil, a wireless power supply module and a wireless receiving module; the first coil is respectively and electrically connected with the wireless receiving module and the wireless power supply module, the first coil is magnetically coupled with the second coil, the second coil is respectively and electrically connected with the wireless data sending module, the modulation and demodulation module and the pressure sensor, and the amplifying module is electrically connected with the pressure sensor.
The invention has the beneficial effects that:
the problem of traditional non-contact torque sensor precision and reliability lower is solved: according to the non-contact magnetic coupling torque sensor, the first circuit board and the second circuit board are arranged on the stator and the rotor, wireless power supply of the second circuit board to the first circuit board is achieved through magnetic coupling between the first circuit board and the second circuit board, meanwhile, the rotor transmits wireless data to the stator, and the torque value detected by the current sensor can be read out by reading the data on the stator and calculating the data through a corresponding control algorithm. Compared with the traditional torque sensor, the invention does not need to use a winding coil and a framework, realizes the same effect through magnetic coupling between circuit boards, and solves the problem of lower precision and reliability of the traditional non-contact torque sensor.
Drawings
The invention is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be obtained on the basis of the following drawings without inventive effort.
Fig. 1 is a schematic perspective view of the present invention.
Fig. 2 is a schematic structural diagram of the rotating shaft, the stator and the rotating shaft.
Fig. 3 is a cross-sectional view of the present invention.
FIG. 4 is a schematic view of the magnetic coupling of the present invention.
Fig. 5 is a circuit diagram of the first circuit board and the second circuit board.
Fig. 6 is a circuit diagram of an amplifying module.
Reference numerals
A stator-100, a second circuit board-101, a groove-102, a rotor-200, a first circuit board-201, a protrusion-202, a through hole-203, a rotation shaft-300, a grounding piece-301, a counting assembly-400, a housing-500, a bearing-501, a third circuit board-502, an electric connection port-503, a sealing ring-504,
the device comprises a first coil-601, a modulation and demodulation module-602, a pressure sensor-603, an amplification module-604, a wireless transmission module-605, a second coil-606, a wireless power supply module-607 and a wireless receiving module-608.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
It should be noted that the structures shown in the drawings are only used for matching the disclosure of the present invention, so as to be understood and read by those skilled in the art, and are not used to limit the conditions of the present invention, so that the present invention has no technical significance, and any modifications or adjustments of the structures should still fall within the scope of the technical contents of the present invention without affecting the function and the achievable purpose of the present invention.
As shown in fig. 1 to 4, a non-contact magnetic coupling torque sensor includes a stator 100, a rotor 200 and a rotating shaft 300, wherein the rotating shaft 300 is used for connecting with an external driving mechanism, the rotor 200 is coaxially and rotatably connected with the rotating shaft 300, and the stator 100 and the rotor 200 are arranged at intervals; one end face of the rotor 200 close to the stator 100 is provided with a first circuit board 201, one end face of the stator 100 close to the rotor 200 is provided with a second circuit board 101, and magnetic coupling is formed between the first circuit board 201 and the second circuit board 101. The principle of magnetic coupling of the first circuit board 201 and the second circuit board 101 is shown in fig. 4.
In the present embodiment, the first circuit board 201 and the second circuit board 101 are PCBs.
Specifically, according to the non-contact magnetic coupling torque sensor, the first circuit board 201 and the second circuit board 101 are arranged on the stator 100 and the rotor 200, wireless power supply of the second circuit board 101 to the first circuit board 201 is achieved through magnetic coupling between the first circuit board 201 and the second circuit board 101, meanwhile, the rotor 200 transmits wireless data to the stator 100, and the torque value detected by the current sensor can be read out by reading the data on the stator 100 and calculating the data through a corresponding control algorithm. Compared with the traditional torque sensor, the invention does not need to use a winding coil and a framework, realizes the same effect through magnetic coupling between circuit boards, and solves the problem of lower precision and reliability of the traditional non-contact torque sensor.
Specifically, the first circuit board 201 includes a first coil 601, a modulation and demodulation module 602, a pressure sensor 603, an amplification module 604 and a wireless transmission module 605, and the second circuit board 202 includes a second coil 606, a wireless power supply module 607 and a wireless receiving module 608; the first coil 601 is electrically connected with the wireless receiving module 608 and the wireless power supply module 607, the first coil 601 is magnetically coupled with the second coil 606, the second coil 606 is electrically connected with the wireless data transmitting module, the modulation and demodulation module 602 and the pressure sensor 603, and the amplifying module 604 is electrically connected with the pressure sensor 603.
Taking this embodiment as an example, the first coil 601 and the second coil 606 of this embodiment do not need to be wound around the frame, so the thickness of the first circuit board and the thickness of the second circuit board of this embodiment are thinner, which can save the cost; as shown in fig. 5 and 6, the pressure sensor 603 is preferably a strain gauge, and external torque is transmitted to the pressure sensor through the rotating shaft 300603, the pressure sensor 603 generates pressure deformation, the resistance value of the pressure sensor 603 changes, a small voltage signal mV is generated, the small voltage signal mV is amplified by the amplifying module 604 to be a large voltage signal V, the large voltage signal V is converted into a digital signal by analog-to-digital conversion of the ADC, and the torque value is obtained by reading the digital information through the processor MCU. In particular, the method comprises the following steps of,
the formula for calculating mV is shown above.
Specifically, the stator 100 and the rotor 200 are both cylindrical structures, so that the space of the sensor is saved.
Specifically, a protrusion 202 is formed on the other end surface of the rotor 200 and extends outwards, and a plurality of through holes 203 are formed in the side wall of the protrusion 202 at equal intervals; a counting assembly 400 for detecting the through hole 203 is arranged above the rotating shaft 300. Reading through holes 203 with equal distances on the surface of the counting assembly 400 to assist in counting; when the rotating shaft 300 rotates, the counting assembly 400 realizes a counting function, generates a pulse square wave signal and outputs the pulse square wave signal, and calculates the rotating speed. Preferably, the counting assembly 400 is a reflective optical sensor.
Specifically, one side of the stator 100 is provided with a groove 102, which is convenient for taking the first circuit board 201.
Specifically, the sensor further includes a housing 500, the housing 500 is provided with two bearings 501, and the bearings 501 are respectively sleeved at two ends of the rotating shaft 300. The housing 500 can protect the devices inside the sensor, and the bearing 501 can ensure the stability of the rotating shaft 300 during rotation.
Specifically, the sensor further comprises a third circuit board 502, wherein the third circuit board 502 is provided with an electrical connection port 503 electrically connected with the third circuit board 502; the third circuit board 502 is electrically connected to the second circuit board 101. In this embodiment, the electrical connection port 503 is an 8pin male connector, and the torque value of the sensor can be read by using a corresponding instrument through electrical connection and matching with an 8pin female connector of the same type.
Specifically, a seal ring 504 is provided between the electrical connection port 503 and the housing 500, so that the sealing property in the sensor can be increased.
Specifically, the rotating shaft 300 is provided with a grounding member 301 for grounding, and since the material of the rotating shaft 300 is usually stainless steel or other alloy materials, tin or tin wires cannot be welded to the rotating shaft 300; in addition, the pressure sensor 603 and the circuit board are mounted on the rotating shaft 300, and the anti-interference capability of the sensor can be improved by arranging the grounding piece 301. Preferably, the grounding member 301 is a screw.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. A contactless magnetically-coupled torque sensor, characterized by: the motor comprises a stator (100), a rotor (200) and a rotating shaft (300), wherein the rotating shaft (300) is used for being connected with an external driving mechanism, the rotor (200) is coaxially and rotatably connected with the rotating shaft (300), and the stator (100) and the rotor (200) are arranged at intervals;
one end face, close to the stator (100), of the rotor (200) is provided with a first circuit board (201), one end face, close to the rotor (200), of the stator (100) is provided with a second circuit board (101), and magnetic coupling is formed between the first circuit board (201) and the second circuit board (101).
2. A contactless magnetically-coupled torque sensor according to claim 1, wherein: the stator (100) and the rotor (200) are both of cylindrical structures.
3. A contactless magnetically-coupled torque sensor according to claim 1, wherein: a convex part (202) is arranged on the other end face of the rotor (200) in an outward extending mode, and a plurality of through holes (203) are arranged on the side wall of the convex part (202) at equal intervals; and a counting assembly (400) for detecting the through hole (203) is arranged above the rotating shaft (300).
4. A contactless magnetically-coupled torque sensor according to claim 3, wherein: the counting assembly (400) is a reflective optical sensor.
5. A contactless magnetically-coupled torque sensor according to claim 1, wherein: one side of the stator (100) is provided with a groove (102).
6. A contactless magnetically-coupled torque sensor according to claim 1, wherein: the sensor further comprises a shell (500), two bearings (501) are arranged on the shell (500), and the bearings (501) are respectively sleeved at two ends of the rotating shaft (300).
7. A contactless magnetically-coupled torque sensor according to claim 6, wherein: the sensor further comprises a third circuit board (502), the third circuit board (502) is provided with an electric connecting port (503) electrically connected with the third circuit board (502); the third circuit board (502) is electrically connected with the second circuit board (101).
8. A contactless magnetically-coupled torque sensor according to claim 7, wherein: and a sealing ring (504) is arranged between the electric connecting port (503) and the shell (500).
9. A contactless magnetically-coupled torque sensor according to claim 1, wherein: the rotating shaft (300) is provided with a grounding piece (301) for grounding, and the grounding piece (301) is a screw.
10. A contactless magnetically-coupled torque sensor according to claim 1, wherein: the first circuit board (201) comprises a first coil (601), a modulation and demodulation module (602), a pressure sensor (603), an amplification module (604) and a wireless transmission module (605), and the second circuit board (202) comprises a second coil (606), a wireless power supply module (607) and a wireless receiving module (608);
the first coil (601) is respectively and electrically connected with the wireless receiving module (608) and the wireless power supply module (607), the first coil (601) is magnetically coupled with the second coil (606), the second coil (606) is respectively and electrically connected with the wireless data transmitting module, the modulation and demodulation module (602) and the pressure sensor (603), and the amplifying module (604) is electrically connected with the pressure sensor (603).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110933586.7A CN113465801A (en) | 2021-08-14 | 2021-08-14 | Non-contact magnetic coupling torque sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110933586.7A CN113465801A (en) | 2021-08-14 | 2021-08-14 | Non-contact magnetic coupling torque sensor |
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| Publication Number | Publication Date |
|---|---|
| CN113465801A true CN113465801A (en) | 2021-10-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110933586.7A Pending CN113465801A (en) | 2021-08-14 | 2021-08-14 | Non-contact magnetic coupling torque sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115752842A (en) * | 2022-11-28 | 2023-03-07 | 汉中精测电器有限责任公司 | Non-contact torque sensor |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6084368A (en) * | 1996-06-24 | 2000-07-04 | Siemens Aktiengesellschaft | Arrangement for the contactless inductive transmission of electric measurement values and/or electric energy between a rotor and a stator |
| JP2004127276A (en) * | 2002-09-09 | 2004-04-22 | Ntn Corp | Wireless sensor system and bearing device with wireless sensor |
| US20040155649A1 (en) * | 2002-09-04 | 2004-08-12 | Gerold Kloos | Speed measuring system |
| JP2009053048A (en) * | 2007-08-27 | 2009-03-12 | Jtekt Corp | Torque detector |
| CN201983887U (en) * | 2010-12-09 | 2011-09-21 | 天津市松正电动汽车技术股份有限公司 | Non-contact torque sensor and electric power-assisted steering system |
| CN102735866A (en) * | 2012-07-06 | 2012-10-17 | 蔡洪文 | Photoelectric counter pulse-based method for measuring rotation speed difference of two shafts |
| CN109084926A (en) * | 2018-08-08 | 2018-12-25 | 武汉理工大学 | Torque of rotating shaft measurement method and system based on wireless technology |
| CN211553150U (en) * | 2019-07-04 | 2020-09-22 | 东莞市南力测控设备有限公司 | Non-contact torque sensor |
| CN112345135A (en) * | 2019-08-09 | 2021-02-09 | 上海天沐自动化仪表有限公司 | Non-contact dynamic torque sensor |
| CN212645955U (en) * | 2020-08-21 | 2021-03-02 | 上海微创医疗器械（集团）有限公司 | Dynamic torque measuring device and surgical robot |
-
2021
- 2021-08-14 CN CN202110933586.7A patent/CN113465801A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6084368A (en) * | 1996-06-24 | 2000-07-04 | Siemens Aktiengesellschaft | Arrangement for the contactless inductive transmission of electric measurement values and/or electric energy between a rotor and a stator |
| US20040155649A1 (en) * | 2002-09-04 | 2004-08-12 | Gerold Kloos | Speed measuring system |
| JP2004127276A (en) * | 2002-09-09 | 2004-04-22 | Ntn Corp | Wireless sensor system and bearing device with wireless sensor |
| JP2009053048A (en) * | 2007-08-27 | 2009-03-12 | Jtekt Corp | Torque detector |
| CN201983887U (en) * | 2010-12-09 | 2011-09-21 | 天津市松正电动汽车技术股份有限公司 | Non-contact torque sensor and electric power-assisted steering system |
| CN102735866A (en) * | 2012-07-06 | 2012-10-17 | 蔡洪文 | Photoelectric counter pulse-based method for measuring rotation speed difference of two shafts |
| CN109084926A (en) * | 2018-08-08 | 2018-12-25 | 武汉理工大学 | Torque of rotating shaft measurement method and system based on wireless technology |
| CN211553150U (en) * | 2019-07-04 | 2020-09-22 | 东莞市南力测控设备有限公司 | Non-contact torque sensor |
| CN112345135A (en) * | 2019-08-09 | 2021-02-09 | 上海天沐自动化仪表有限公司 | Non-contact dynamic torque sensor |
| CN212645955U (en) * | 2020-08-21 | 2021-03-02 | 上海微创医疗器械（集团）有限公司 | Dynamic torque measuring device and surgical robot |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115752842A (en) * | 2022-11-28 | 2023-03-07 | 汉中精测电器有限责任公司 | Non-contact torque sensor |
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Application publication date: 20211001 |