CN217689001U - Rotating speed measuring device - Google Patents
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- CN217689001U CN217689001U CN202220132968.XU CN202220132968U CN217689001U CN 217689001 U CN217689001 U CN 217689001U CN 202220132968 U CN202220132968 U CN 202220132968U CN 217689001 U CN217689001 U CN 217689001U
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- 238000012360 testing method Methods 0.000 claims description 9
- 230000008859 change Effects 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 7
- 230000001939 inductive effect Effects 0.000 claims description 5
- 230000003068 static effect Effects 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000033001 locomotion Effects 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000004804 winding Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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Abstract
The utility model relates to a motor field, in particular to rotational speed measuring device angular adjustment structure. The rotating speed measuring device comprises a tested device and an eddy current sensor; the tested device at least comprises a tested rotating speed part, and a plurality of rotating axes of the tested rotating speed part are positioned on the same axis; the eddy current sensor comprises an eddy current coil part, an eddy current induction part and a data processor, wherein the eddy current coil part and the eddy current induction part are respectively fixedly arranged on a first tested rotating speed part and a reference part of the first tested rotating speed part, and the eddy current coil part and the eddy current induction part are arranged on the same rotating axis and can generate positions with regular changes of induced electromotive force when in relative rotation motion; the data processor is disposed on the vortex coil portion or a component that is stationary relative to the vortex coil portion and is in communication with the vortex coil portion. The device has small volume and simple structure, and solves or partially solves the problems of large volume and complex structure of the rotating speed measuring device in the prior art.
Description
Technical Field
The utility model relates to a motor field, concretely relates to rotational speed measuring device.
Background
When measuring the relative rotation speed of two shafts, at present, an angle sensor is usually mounted on each of the two shafts, and then the relative position and relative rotation speed information of the two shafts are obtained by measuring the difference between the position information or rotation speed information of the two angle sensors. As one of the angle sensors, a reluctance resolver is commonly used for measuring relative rotation speeds of two shafts of a dual-rotor motor.
However, in the prior art, the reluctance type rotary transformer mainly comprises a stator, a rotor, an excitation winding, a sine winding, a cosine winding and the like, a special decoding chip is required to calculate position information, two reluctance type rotary transformers are adopted when the relative rotating speed of two shafts is measured, the system is large in size and complex in structure, and the reluctance type rotary transformer is not suitable for places with small spatial positions.
SUMMERY OF THE UTILITY MODEL
Therefore, the utility model provides an angular adjustment structure solves or partially solves among the prior art rotational speed measuring device problem bulky, that the structure is complicated.
In order to achieve the above purpose, the technical scheme of the utility model is realized like this:
a rotational speed measuring device comprises a device to be measured and an eddy current sensor;
the tested device at least comprises a tested rotating speed part, and a plurality of rotating axes of the tested rotating speed part are positioned on the same axis;
the eddy current sensor comprises an eddy current coil part, an eddy current induction part and a data processor, wherein the eddy current coil part and the eddy current induction part are respectively and fixedly arranged on a first measured rotating speed part and a reference part of the first measured rotating speed part, and the eddy current coil part and the eddy current induction part are arranged on the same rotating axis and can generate positions with induced electromotive force regular change when in relative rotation motion; the data processor is disposed on the eddy current coil portion or a component that is stationary relative to the eddy current coil portion and is in communication with the eddy current coil portion.
Optionally, the eddy current coil part comprises an excitation coil and a signal coil thereon;
the signal coils comprise sine coils and cosine coils, the difference between the phase angles of the sine coils and the phase angles of the cosine coils is 90 degrees, and the sine coils and the cosine coils are connected in an anti-series mode;
the excitation coil and the signal coil are both in communication connection with the data processor.
Optionally, the excitation coil and the signal coil are printed on a circuit board.
Optionally, the eddy current induction part is a metal plate having a plurality of blades.
Optionally, the device under test comprises a first rotating part and a second rotating part;
the eddy current coil portion is fixed coaxially with the first rotating portion, and the eddy current sensing portion is fixed coaxially with the second rotating portion.
Optionally, the device under test is a dual rotor motor;
the eddy current coil part is fixedly connected to an inner rotor shaft or an inner rotor shaft of the dual-rotor motor, the eddy current coil part rotates along with the inner rotor shaft and coaxially, the eddy current induction part is fixedly connected to an outer rotor shaft or an outer rotor shaft of the dual-rotor motor, and the eddy current induction part rotates along with the outer rotor shaft and coaxially;
or, the eddy current coil part is fixedly connected to an outer rotor or an outer rotor shaft of the dual-rotor motor, the eddy current coil part rotates along with the inner rotor shaft and coaxially, the eddy current induction part is fixedly connected to the outer rotor or the outer rotor shaft of the dual-rotor motor, and the eddy current induction part rotates along with the outer rotor shaft and coaxially.
Optionally, the eddy current induction part is a metal plate target part with a plurality of blades and fixed on the side wall of the outer rotor of the double-rotor motor.
Optionally, the device further comprises a signal output part, and the signal output part transmits the rotating speed difference value to an external signal processing system.
Optionally, the signal output part comprises a slip ring structure, the slip ring structure is fixedly connected with the eddy current coil part, and a transmission line of an induction signal generated by the eddy current coil part is led out from a rotating position to the signal processing system through the slip ring.
Optionally, the slip ring is a disc slip ring comprising a slip ring stator and a slip ring rotor;
the slip ring stator is fixedly arranged on the tested device body, the slip ring stator and the eddy current coil part are coaxially fixed, and the slip ring stator and the slip ring rotor rotate coaxially. The utility model discloses a rotating speed measuring device, the measured equipment at least includes a measured rotating speed part, when the measured equipment has two or more measured rotating speed parts, the rotating axis of the measured rotating speed part is on the same axis; the eddy current sensor comprises an eddy current coil part and an eddy current induction part, wherein the eddy current coil part is fixedly arranged on the first measured rotating speed part or a rotating shaft of the first measured rotating speed part, and the eddy current induction part is fixedly arranged on the reference part of the first measured rotating speed part or the rotating shaft of the reference part, so that the rotating speed of the eddy current coil part is the same as that of the rotating shaft of the first measured rotating speed part, and the deflection angle of the eddy current induction part is the same as that of the rotating shaft of the reference part; or the eddy current sensing part is fixedly arranged on the first measured rotating speed part or the rotating shaft of the first measured rotating speed part, and the eddy current coil part is fixedly arranged on the reference part of the first measured rotating speed part or the rotating shaft of the reference part, so that the rotating speed of the eddy current sensing part is the same as that of the rotating shaft of the first measured rotating speed part, and the deflection angle of the eddy current coil part is the same as that of the rotating shaft of the reference part; the eddy current coil part and the eddy current induction part are arranged on the same rotating axis and can generate positions with regular change of induced electromotive force when in relative rotation motion; the data processor is arranged on the eddy current coil part or a part which is relatively static with the eddy current coil part, is in communication connection with the eddy current coil part, and receives and processes data information generated by relative movement of the eddy current coil part and the eddy current induction part so as to calculate the rotating speed of the equipment to be tested. When the reference part relative rotation speed measuring device is static, the measured rotation speed is the absolute speed of the first measured rotation speed part; when the reference portion relative rotation speed measuring device is in rotational motion, the measured rotation speed is the relative rotation speed of the first measured rotation speed portion and the reference portion. In addition, the device can also measure the relative deflection angle and other information of the measured rotating speed part and the reference part. Compared with the reluctance type rotary transformer in the prior art, the rotating speed measuring device of the utility model adopts the eddy current sensor, has small volume and simple structure, can measure the relative rotating speed of two shafts by only one group, reduces the complexity and cost of the system, has strong environmental adaptability, and can be suitable for the high-grade severe environment of vehicles; in addition, the rotating speed measuring device does not have the problems of time lag, error accumulation and the like, and the measurement is more real-time and accurate.
The above description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented according to the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more obvious and understandable, the following detailed description of the present invention is given.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of the overall structure of the rotation speed measuring device of the present invention;
fig. 2 is a schematic view of the installation of the rotation speed measuring device according to the present invention;
fig. 3 is a schematic view of the structure of the sensing portion of the present invention;
FIG. 4 is a left side view of FIG. 3;
fig. 5 is a schematic structural view of the eddy current coil part of the present invention;
fig. 6 is a left side view of fig. 5.
Description of reference numerals: 1-tested equipment, 11-tested equipment body, 12-first tested rotating speed part, 13-reference part, 14-first rotating shaft, 15-second rotating shaft, 2-electric eddy current sensor, 21-eddy current coil part, 22-eddy current induction part, 211-first sine coil, 212-second sine coil, 213-first cosine coil, 214-second cosine coil, 215-excitation coil, 216-signal coil, 3-signal output part, 31-slip ring rotor and 32-slip ring stator.
Detailed Description
The technical solutions of the present invention will be described more clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
As shown in fig. 1 to 6, an embodiment of the present application discloses a rotational speed measuring apparatus, which is characterized by comprising a device under test 1 and an eddy current sensor 2; the device to be tested at least comprises a rotating speed part to be tested, and a plurality of rotating axes of the rotating speed part to be tested are positioned on the same axis; the eddy current sensor comprises an eddy current coil part 21, an eddy current induction part 22 and a data processor, wherein the eddy current coil part 21 and the eddy current induction part 22 are respectively and fixedly arranged on a first measured rotating speed part 12 and a reference part 13 of the first measured rotating speed part 12, and the eddy current coil part 21 and the eddy current induction part 22 are arranged on the same rotating axis and can generate positions with regular changes of induced electromotive force during relative rotation; the data processor is disposed on the eddy current coil part 21 or a component that is stationary relative to the eddy current coil part 21, and is communicatively connected to the eddy current coil part 21.
Specifically, as shown in fig. 1 to 6, the device under test at least includes one rotating speed portion, and when the device under test has two or more rotating speed portions, the rotating axes of the rotating speed portions are located on the same axis; the eddy current sensor comprises an eddy current coil part 21 and an eddy current sensing part 22, wherein the eddy current coil part 21 is fixedly arranged on the first measured rotating speed part 12 or the first rotating shaft 14 of the rotating shaft of the first measured rotating speed part 12, the eddy current sensing part 22 is fixedly arranged on the reference part 13 of the first measured rotating speed part 12 or the second rotating shaft 15 of the rotating shaft of the reference part 13, therefore, the rotating speed of the eddy current coil part 21 is the same as that of the rotating shaft of the first measured rotating speed part 12, and the deflection angle of the eddy current sensing part 22 is the same as that of the rotating shaft of the reference part 13; alternatively, the eddy current sensing unit 22 is fixedly mounted on the first measured rotating speed unit 12 or the rotating shaft of the first measured rotating speed unit 12, and the eddy current coil unit 21 is fixedly mounted on the reference unit 13 of the first measured rotating speed unit 12 or the rotating shaft of the reference unit 13, so that the rotating speed of the eddy current sensing unit 22 is the same as the rotating speed of the rotating shaft of the first measured rotating speed unit 12, and the deflection angle of the eddy current coil unit 21 is the same as the deflection angle of the rotating shaft of the reference unit 13; the eddy current coil part 21 and the eddy current induction part 22 are arranged on the same rotation axis and can generate a position where the induced electromotive force changes regularly when the eddy current coil part and the eddy current induction part rotate relatively; the data processor is arranged on the eddy current coil part 21 or a part which is relatively static with the eddy current coil part 21, is in communication connection with the eddy current coil part 21, and receives and processes data information generated by the relative motion of the eddy current coil part 21 and the eddy current induction part 22 so as to calculate the rotating speed of the device to be tested. When the reference portion 13 is stationary with respect to the rotation speed measuring device, the measured rotation speed is the absolute speed of the first measured rotation speed portion 12; when the reference portion 13 is in rotational motion relative to the rotational speed measuring device, the measured rotational speed is the relative rotational speed of the first measured rotational speed portion 12 and the reference portion 13. In addition, the device can also measure information such as the relative deflection angle of the first measured rotation speed part 12 and the reference part 13. Compare with the reluctance type resolver among the prior art, the utility model discloses a rotational speed measuring device adopts eddy current sensor, and is small, simple structure, and only needs a set of diaxon relative rotation speed that can measure, has reduced the complexity and the cost of system.
As shown in fig. 2 to 5, in one embodiment, the eddy current coil portion 21 includes an excitation coil 215 and a signal coil 216 thereon; the signal coil 216 includes a first sine coil 211, a second sine coil 212, a first cosine coil 213 and a second cosine coil 214, the sine coil and the cosine coil have a phase angle of 90 degrees, and the sine coil and the cosine coil are connected in an anti-series manner; the excitation coil 215 and the signal coil 216 are both communicatively coupled to the data processor.
Specifically, if an induced electromotive force is generated in the first sine coil 211 and the second sine coil 212, the first cosine coil 213, and the first cosine coil 214 when an excitation current passes through the excitation coil 215, and there is no eddy current induction portion on the excitation coil 215, since the output signals of the first sine coil 211 and the second sine coil 212 are connected in anti-series, the voltage is compensated, and the signal is zero output on each pair of terminals. If the exciting coil 215 has an eddy current inducing portion, the eddy current inducing portion 22 induces eddy current under the action of the exciting magnetic field, and causes the magnetic flux density in the areas of the first sine coil 211 and the second sine coil 212, and the first cosine coil 213 and the second cosine coil 214 to decrease, and an imbalance is generated in the voltage of the anti-series coil section. The amplitude and polarity of the final output voltage change with the rotation position of the eddy current induction part 22, and the data processor receives and processes the corresponding data, so that the measurement of the rotation speed and the angle can be realized.
As shown in fig. 2 to 5, the exciting coil 215 and the signal coil 216 are printed on a circuit board.
Specifically, the excitation coil 215 and the signal coil 216 are adjustable in wire thickness and coil size, and can be printed on a circuit board, and are particularly suitable for devices with a small installation space.
In one embodiment, the eddy current inducing part 22 is a metal plate having a plurality of blades.
Specifically, the eddy current induction unit 22 is a metal plate having a plurality of blades, and when the eddy current induction unit 22 and the eddy current coil unit 21 move relative to each other, the magnetic induction lines of the eddy current coil unit 21 cut by the respective blades cause a change in induced electromotive force.
As shown in fig. 2 to 5, the device under test includes a first rotating part and a second rotating part; the eddy current coil portion 21 is fixed coaxially with the first rotating portion, and the eddy current induction portion 22 is fixed coaxially with the second rotating portion.
It is understood that the first rotating part corresponds to the first measured rotating speed part 12, the second rotating part corresponds to the reference part 13, the eddy current coil part 21 is coaxially fixed with the first rotating part, and the eddy current sensing part 22 is coaxially fixed with the second rotating part, so that the rotating speed of the eddy current coil part 21 is the same as the rotating speed of the rotating shaft of the first rotating part, and the deflection angle of the eddy current coil part 21 is the same as the deflection angle of the first rotating part; the rotational speed of the eddy current sensor 22 is the same as the rotational speed of the second rotating member, and the deflection angle of the eddy current sensor 22 is the same as the deflection angle of the second rotating member. When the first rotating part and the second rotating part have different rotating speeds, the regular change of induced electromotive force can be generated, and the data processor receives the signal transmitted by the eddy current coil part 21 and calculates the relative rotating speeds of the first rotating part and the second rotating part.
As shown in fig. 2 to 5, in one embodiment, the device under test is a dual-rotor motor; the eddy current coil part 21 is fixedly connected to an inner rotor shaft or an inner rotor shaft of the dual-rotor motor, the eddy current coil part 21 rotates with the inner rotor shaft coaxially, the eddy current induction part 22 is fixedly connected to an outer rotor shaft or an outer rotor shaft of the dual-rotor motor, and the eddy current induction part 22 rotates with the outer rotor shaft coaxially; or, the eddy current coil part 21 is fixedly connected to an outer rotor or an outer rotor shaft of the dual-rotor motor, the eddy current coil part 21 rotates with the inner and outer rotor shafts coaxially, the eddy current induction part 22 is fixedly connected to the outer rotor or the outer rotor shaft of the dual-rotor motor, and the eddy current induction part 22 rotates with the outer rotor shaft coaxially.
It is understood that the inner rotor of the two-rotor motor corresponds to a first rotating portion, the outer rotor of the two-rotor motor corresponds to a second rotating portion, the eddy current coil portion 21 is coaxially fixed with the inner rotor, and the eddy current induction portion 22 is coaxially fixed with the outer rotor, so that the rotation speed of the eddy current coil portion 21 is the same as that of the rotating shaft of the inner rotor, and the deflection angle of the eddy current coil portion 21 is the same as that of the inner rotor; the rotation speed of the eddy current induction part 22 is the same as that of the outer rotor rotation shaft, and the deflection angle of the eddy current induction part 22 is the same as that of the outer rotor. When the rotation speeds of the inner rotor and the outer rotor are different, regular change of induced electromotive force can be generated, and the data processor receives signals transmitted from the eddy current coil part 21 and calculates the relative rotation speeds of the inner rotor and the outer rotor.
In one embodiment, the eddy current induction part 22 is a metal plate target part with a plurality of blades fixed on the side wall of the outer rotor of the dual-rotor motor.
Specifically, the eddy current induction unit 22 includes a metal plate having a plurality of blades, and when the eddy current induction unit 22 and the eddy current coil unit 21 move relative to each other, the magnetic induction lines of the eddy current coil unit 21 cut by the respective blades cause a change in induced electromotive force.
In an embodiment, the rotation speed measuring device further comprises a signal output part 3, and the signal output part transmits the rotation speed difference value to an external signal processing system.
It will be appreciated that the signal output 3 may transmit data directly or via a data processor to an external signal processing system, which may process the data for display or other applications.
In an embodiment, the signal output part 3 includes a slip ring structure, the slip ring structure is fixedly connected with the eddy current coil part 21, and a transmission line of the induction signal generated by the eddy current coil part 21 is led out from a rotating position to the signal processing system through the slip ring, so that the influence on a physical line of signal transmission while the signal is output can be minimized.
In an embodiment, the slip ring is a disc slip ring comprising a slip ring stator 32 and a slip ring rotor 31; the slip ring stator 32 is fixedly arranged on the tested device body 11, the slip ring stator 32 and the eddy current coil part 21 are coaxially fixed, and the slip ring stator 32 and the slip ring rotor 31 rotate coaxially.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious changes and modifications can be made without departing from the scope of the invention.
Claims (10)
1. A rotating speed measuring device is characterized by comprising a device to be measured (1) and an eddy current sensor (2);
the device (1) to be tested at least comprises a rotating speed part to be tested, and a plurality of rotating axes of the rotating speed part to be tested are positioned on the same axis;
the eddy current sensor (2) comprises an eddy current coil part (21), an eddy current induction part and a data processor, wherein the eddy current coil part (21) and the eddy current induction part are respectively and fixedly arranged on a first measured rotating speed part and a reference part of the first measured rotating speed part, and the eddy current coil part (21) and the eddy current induction part are arranged on the same rotating axis and can generate a position for inducing the regular change of electromotive force during relative rotation; the data processor is arranged on the vortex coil part (21) or a component which is relatively static with the vortex coil part (21), and is connected with the vortex coil part (21) in a communication way.
2. A rotation speed measuring apparatus according to claim 1, wherein the eddy current coil portion (21) includes an excitation coil (215) and a signal coil (216) thereon;
the signal coil (216) comprises a sine coil and a cosine coil, the sine coil and the cosine coil have a phase angle difference of 90 degrees, and the sine coil and the cosine coil are connected in an anti-series manner;
the excitation coil (215) and the signal coil (216) are both communicatively coupled to the data processor.
3. A rotation speed measuring apparatus according to claim 2, wherein the exciting coil (215) and the signal coil (216) are printed on a circuit board.
4. A rotation speed measuring apparatus according to claim 1, wherein the eddy current inducing portion (22) is a metal plate having a plurality of blades.
5. Rotational speed measuring device according to claim 1, characterized in that the device under test (1) comprises a first and a second rotating part;
vortex coil portion (21) with first rotating part is fixed with the axle center, vortex response portion (22) with second rotating part is fixed with the axle center.
6. A rotation speed measuring device according to claim 5, characterized in that the device under test (1) is a double rotor motor;
the eddy current coil part (21) is fixedly connected to an inner rotor or an inner rotor shaft of the dual-rotor motor, the eddy current coil part (21) rotates coaxially with the inner rotor shaft, the eddy current induction part (22) is fixedly connected to an outer rotor or an outer rotor shaft of the dual-rotor motor, and the eddy current induction part (22) rotates coaxially with the outer rotor shaft;
or, the eddy current coil part (21) is fixedly connected to an outer rotor or an outer rotor shaft of the dual-rotor motor, the eddy current coil part (21) rotates coaxially with the outer rotor shaft, the eddy current induction part (22) is fixedly connected to the outer rotor or the outer rotor shaft of the dual-rotor motor, and the eddy current induction part (22) rotates coaxially with the outer rotor shaft.
7. A rotation speed measuring apparatus according to claim 6, wherein the eddy current induction portion (22) is a metal plate target portion having a plurality of blades fixed to a side wall of an outer rotor of the double rotor motor.
8. A rotation speed measuring device according to any one of claims 1-7, characterized by further comprising a signal output (3), the signal output (3) being adapted to transmit the rotation speed difference to an external signal processing system.
9. A rotational speed measuring device according to claim 8, characterized in that the signal output part (3) comprises a slip ring structure, which is fixedly connected with the eddy current coil part (21), through which slip ring a transmission line of the induced signal generated by the eddy current coil part (21) is led out from a rotational position to the signal processing system.
10. A rotational speed measuring device according to claim 9, characterized in that the slip ring is a disc slip ring comprising a slip ring stator (32) and a slip ring rotor (31);
the slip ring stator (32) is fixedly arranged on the tested device (1) body, the slip ring stator (32) and the eddy current coil part (21) are coaxially fixed, and the slip ring stator (32) and the slip ring rotor (31) rotate coaxially.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220132968.XU CN217689001U (en) | 2022-01-18 | 2022-01-18 | Rotating speed measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220132968.XU CN217689001U (en) | 2022-01-18 | 2022-01-18 | Rotating speed measuring device |
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| Publication Number | Publication Date |
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| CN217689001U true CN217689001U (en) | 2022-10-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220132968.XU Active CN217689001U (en) | 2022-01-18 | 2022-01-18 | Rotating speed measuring device |
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| CN (1) | CN217689001U (en) |
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- 2022-01-18 CN CN202220132968.XU patent/CN217689001U/en active Active
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