CN210014751U - Measuring device for detecting rotation angle of shaft - Google Patents
Measuring device for detecting rotation angle of shaft Download PDFInfo
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- CN210014751U CN210014751U CN201920440758.5U CN201920440758U CN210014751U CN 210014751 U CN210014751 U CN 210014751U CN 201920440758 U CN201920440758 U CN 201920440758U CN 210014751 U CN210014751 U CN 210014751U
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Abstract
The utility model relates to an axle detects technical field, a measuring device for detecting axle turned angle is provided, this measuring device includes the base, locate the pivot of being surveyed on the base, locate in the pivot of being surveyed and with the synchronous pivoted master gear of the pivot of being surveyed, the slave gear of being connected with master gear transmission, a first sensing element for perception master gear turned position, a second sensing element for the perception follows gear turned position and be used for receiving first sensing element and second sensing element data and utilize piecewise function algorithm to calculate the analysis and processing unit of being surveyed pivot turned angle. The utility model provides a measuring device for be used for detecting axle turned angle utilizes two sensing units, adopts piecewise function algorithm to calculate axle turned angle simultaneously, and the measurement range is big, has both overcome the limited defect of single sensing unit range small measurement range, also improves measurement accuracy.
Description
Technical Field
The utility model relates to an axle detects technical field, especially provides a measuring device for detecting axle turned angle.
Background
In mechanical structures, it is a common requirement to measure the angle of a rotating object. However, the angle measurement ranges are different, and it is sometimes necessary to measure an angle smaller than 360 degrees, and sometimes necessary to measure an angle larger than 360 degrees.
In many mechanical use scenarios, it is necessary to measure the rotational angle position of a rotating object by means of a combination of a device and a sensor unit, in particular a rotational angle measurement of more than 360 degrees, which allows a contactless arrangement of the sensor unit and the rotating device by means of an analog rotational angle sensor.
Conventional sensing units are classified into optical sensors, inductive sensors, magnetic sensors, and optical sensors according to the sensing method, and optical sensors are generally used to obtain high angle measurement accuracy. The optical sensor has the advantage of high precision, but in order to ensure the precision of the optical sensor, a high-precision coding track must be matched, so that the cost is relatively high. Meanwhile, the optical sensor is sensitive to dirt, and a corresponding sealing structure is required to be arranged. This not only increases the cost, but also increases the size of the device by manufacturing the code disk.
Due to the progress of signal processing technology of magnetic action, the aspect of magnetic sensors is gradually developed into a more mainstream solution, but the magnetic action element is greatly influenced by temperature, and the precision under a high-temperature environment cannot be guaranteed.
The inductive sensing unit, including the rotary transformer, has the advantages of relatively low environmental requirements and guaranteed precision, but the arrangement and design of the sensing unit are complex. Moreover, the measuring range of the induction type sensor is less than 360 degrees, and the angle measurement of the large-angle rotation cannot be carried out.
The existing device for measuring the angle has various modes, wherein, in the existing common method and device for detecting the rotating angle of an object which rotates more than 360 degrees, the detected rotating object and the other two rotatable objects are adopted to rotate in a matching way, all three gears are designed into known tooth numbers, the two matched gears detect the real-time angle by two sensors with magnetic action, and meanwhile, the rotating angle of the detected rotating object is clearly calculated according to the algorithm of the ratio of the detected rotating object and the gears. In the structure, two sensor units are adopted to adopt a principle function, and are combined with the gear device, so that the angle measurement of more than 360 degrees is realized flexibly. Meanwhile, because the sensors are all used for measuring on the auxiliary gear, the transmission clearance inevitably affects the final measuring result, and the measuring precision of the device is difficult to be improved to be within 1 degree; meanwhile, the sensing unit with the gear transmission magnetic action is sensitive to the temperature environment, and the precision of the device is reduced in the high-temperature environment.
To solve this problem, some prior art methods use different sensors for combined measurement, and an evaluation unit for receiving the signals of the two different sensors and for providing information about the angle of rotation of the shaft of the rotary motion on the basis of the vernier principle. However, by adopting a vernier algorithm, the target measurement range and the scalar difference have a linear relationship, the measurement error is large, and the precision is low.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a measuring device for detecting axle turned angle aims at solving the inductive sensor measuring range among the prior art little, adopts vernier algorithm measuring error great, the technical problem that the precision is low.
In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides a measuring device for detecting axle turned angle, includes the base, locates measured pivot on the base, locate measured pivot on and with the synchronous pivoted master gear of measured pivot, with the slave gear that master gear transmission is connected, be used for the perception master gear rotational position's first sensing element, be used for the perception from gear rotational position's second sensing element and be used for receiving first sensing element with second sensing element data and utilize piecewise function algorithm to calculate measured pivot turned angle's analysis and processing unit.
Further, the first sensing unit includes an electric sensing element disposed on the main gear and movable with the main gear, a stator coil disposed on the base, and an electric sensing circuit electrically connected to the coil, wherein the shaft to be measured is disposed in the stator coil, and the electric sensing circuit is electrically connected to the analysis processing unit.
Further, the electric induction elements are multiple and are uniformly distributed on the main gear.
Further, the induction angle range of each electric induction element is 0-120 degrees.
Further, the slave gear is a magnetic part, the second sensing unit is a magnetic induction element capable of inducing the rotation of the magnetic part, and the magnetic induction element is electrically connected with the analysis processing unit.
Further, the induction angle range of the magnetic induction element is 0-360 degrees.
Further, the gear speed reducing mechanism is arranged between the main gear and the auxiliary gear.
Further, the gear reduction mechanism includes a first transmission gear that meshes with the master gear, and a second transmission gear that is disposed coaxially with the first transmission gear and meshes with the slave gear.
Further, the number of teeth of the first transmission gear is larger than that of the second transmission gear.
The utility model has the advantages that:
the utility model provides a measuring device for be used for detecting axle turned angle utilizes two sensing units, adopts piecewise function algorithm to calculate axle turned angle simultaneously, and the measurement range is big, has both overcome the limited defect of single sensing unit range small measurement range, also improves measurement accuracy.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is a schematic structural diagram of a measuring device for detecting a rotation angle of a shaft according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a measuring device for detecting a rotation angle of a shaft according to an embodiment of the present invention.
Fig. 3 is a flowchart of a measuring method for detecting a rotation angle of a shaft according to an embodiment of the present invention;
wherein, in the figures, the respective reference numerals:
1-measured rotating shaft, 11-base, 21-main gear, 22-auxiliary gear, 23-gear speed reducing mechanism, 231-first transmission gear, 232-second transmission gear, 31-first sensing unit, 32-second sensing unit, 41-analysis processing unit.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Example one
Referring to fig. 1, a measuring device for detecting a rotation angle of a shaft according to a first embodiment of the present invention includes a base 11, a shaft 1 to be measured disposed on the base 11, a main gear 21 disposed on the shaft 1 to be measured and rotating synchronously with the shaft 1 to be measured, a slave gear 22 in transmission connection with the main gear 21, a first sensing unit 31 for sensing a rotation position of the main gear 21, a second sensing unit 32 for sensing a rotation position of the slave gear 22, and an analyzing and processing unit 41 for receiving data of the first sensing unit 31 and the second sensing unit 32 and calculating a rotation angle of the shaft 1 to be measured by using a piecewise function algorithm.
In the measuring device for detecting the shaft rotation angle provided in the present embodiment, the first sensing unit 31 is used for measuring the current angle value Xa of the main gear 21, that is, the current angle value Xb of the shaft 1 to be measured, the second sensing unit 32 is used for measuring the current angle value Xb of the slave gear 22, and the analysis processing unit 41 calculates the multi-turn rotation angle β of the shaft 1 to be measured by using the piecewise function algorithm according to Xa and Xb.
Specifically, the first sensing unit 31 includes an electric sensing element (not shown in the figure) disposed on the main gear 21 and movable with the main gear 21, a stator coil (not shown in the figure) disposed on the base 11, and an electric sensing circuit electrically connected to the coil, wherein the measured rotating shaft 1 is disposed in the stator coil, and the electric sensing circuit is electrically connected to the analysis processing unit 41.
In the present embodiment, the plurality of electric sensing elements are uniformly distributed on the main gear 21, so that the main gear 21 can detect the value Xa at each rotation position, and the problem that the rotation angle β can not be detected when exceeding the sensing angle range due to the limited range of a single electric sensing element can be avoided.
Further, the slave gear 22 is a magnetic member, the second sensing unit 32 is a magnetic induction element capable of inducing rotation of the magnetic member, and the magnetic induction element is electrically connected to the analysis processing unit 41. In this embodiment, magnetic induction element and magnetic part cooperation, simple structure, simple to operate, Xb can also obtain great measuring range simultaneously, is favorable to increasing the maximum value of cycle number N. Furthermore, in the present embodiment, the first sensing unit 31 and the second sensing unit 32 use different sensors, i.e. the measurement principles are different, so as to avoid mutual interference during the measurement process.
In this embodiment, the range of the induction angle of the magnetic induction element is 0 ° to 360 °, which is beneficial to increasing the N value, and further improves the maximum range β m of the multi-turn rotation angle.
Example two
Referring to fig. 2, in the present embodiment, a gear reduction mechanism 23 is added between the master gear 21 and the slave gear 22, which is a further improvement on the second embodiment.
Specifically, the gear reduction mechanism 23 includes a first transmission gear 231 that meshes with the master gear 21, and a second transmission gear 232 that is disposed coaxially with the first transmission gear 231 and meshes with the slave gear 22. In this embodiment, the first transmission gear 231 and the second transmission gear 232 rotate coaxially to decelerate and transmit the rotation of the master gear 21 to the slave gear 22, so that the structure is simple and the occupied volume is small. In this embodiment, the number of teeth Y1 of the first transmission gear 231 is greater than the number of teeth Y2 of the second transmission gear 232, and the transmission ratio of the first transmission gear and the second transmission gear is Y1/Y2.
When the gear reduction mechanism 23 is not provided, the number of teeth a of the main gear 21 is set, and the angular range of the first sensing unit is set to be X from the number of teeth B of the gear 22, then the range of the measured rotating shaft 1 is X × a (both a and B are prime numbers, and there is no common divisor therebetween), after the gear reduction mechanism 23 is provided, the range of the measured rotating shaft is X × a × Y1/Y2, compared with the original range X × a, the range is increased, and further the measurement range of the multi-turn rotating angle β is further increased.
Other structures in this embodiment are the same as those in the first embodiment, and are not described herein.
Referring to fig. 3, an embodiment of the present invention further provides a measuring method for detecting a rotation angle of a shaft, including the following steps:
s1, arranging a main gear 21 on the measured rotating shaft 1, and arranging a slave gear 22 meshed with the main gear 21, wherein the number of teeth of the main gear 21 is A, and the number of teeth of the slave gear 22 is B; a first sensing unit 31 for sensing the rotation position of the master gear 21 is arranged on the circumference of the master gear 21, the angular range of the first sensing unit 31 is X, and a second sensing unit 32 for sensing the rotation position of the slave gear 22 is arranged on the slave gear 22;
in this step, specifically, the first sensing unit 31 includes an electric sensing element (not shown in the figure) disposed on the main gear 21 and capable of moving with the main gear 21, a stator coil (not shown in the figure) disposed on the base 11, and an electric sensing circuit electrically connected to the coil, wherein the measured rotating shaft 1 is disposed in the stator coil, and the electric sensing circuit is electrically connected to the analysis processing unit 41.
In the present embodiment, the plurality of electric sensing elements are uniformly distributed on the main gear 21, so that the main gear 21 can detect the value Xa at each rotation position, and the problem that the rotation angle β can not be detected when the sensing angle range X is exceeded due to the limited range of a single electric sensing element can be avoided by distributing the plurality of electric sensing elements on the main gear 21.
Furthermore, the secondary gear 22 is a magnetic member, the second sensing unit 32 is a magnetic induction element capable of inducing rotation of the magnetic member, and the magnetic induction element is electrically connected with the analysis processing unit 41. in the embodiment, the magnetic induction element is matched with the magnetic member, the structure is simple, the installation is convenient, moreover, in the embodiment, the first sensing unit 31 and the second sensing unit 32 adopt different sensors, namely, the two sensors have different measurement principles, so that mutual interference in the measurement process is avoided, the induction angle range of the magnetic induction element is 0-360 degrees, and thus, the value of N is increased, and further, the maximum range β m of the multi-turn rotation angle is increased.
S2, obtaining a current angle value Xa of the main gear 21 relative to the initial position by using the first sensing unit 31, obtaining a current angle value Xb of the slave gear 22 relative to the initial position by using the second sensing unit 32, and obtaining the number of rotations N of the measured spindle 1 by using a formula Xb-Xa B/a;
and S3, calculating the rotation angle β of the measured rotating shaft for multiple circles according to the formula β -X N + Xa.
For example, when the number of teeth a of the main gear 21 is 5, the number of teeth B of the slave gear is 37, and the main gear 21 rotates by 1 tooth, the rotation angle of the measured spindle 1 is 8 °, and the maximum rotation angle range of the measured spindle 1 is 5 × 37 × 8 — 1480 °.
When the main gear 21 rotates 5 teeth, that is, 1 turn, the measured rotating shaft 1 also rotates 1 turn, and at this time, the angular range X of the first sensing unit 31 is equal to 40 °, so that 360/40 equal to 9 first sensing units 31 are uniformly arranged on the measured rotating shaft 1.
When Xa is 0 and Xb is 0, N is 0;
when the current angle value Xa of the first sensing unit 31 is 40 °, that is, when the measured rotating shaft 1 rotates 1 turn, it is determined as 0, and at this time, the second sensing unit 32 corresponds to an Xb value, so that when the measured rotating shaft 1 rotates different turns within the range of the maximum rotation angle range 0 ° to 1480 °, it corresponds to different Xb values, and there are 37 Xb values at most, that is, it is divided into 37 segments, so that when Xa and Xb are known according to the measurement of the first sensing unit 31 and the second sensing unit 32, it is possible to obtain different turns N of the measured rotating shaft 1 by back-pushing according to the formula Xb-Xa B/a.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. A measuring device for detecting a rotation angle of a shaft, characterized in that: the device comprises a base, a tested rotating shaft arranged on the base, a main gear arranged on the tested rotating shaft and synchronously rotating with the tested rotating shaft, a driven gear in transmission connection with the main gear, a first sensing unit used for sensing the rotating position of the main gear, a second sensing unit used for sensing the rotating position of the driven gear, and an analysis processing unit used for receiving data of the first sensing unit and the second sensing unit and calculating the rotating angle of the tested rotating shaft by using a piecewise function algorithm.
2. The measuring device for detecting a shaft rotation angle according to claim 1, characterized in that: the first sensing unit comprises an electric sensing element arranged on the main gear and capable of moving along with the main gear, a stator coil arranged on the base and an electric sensing circuit electrically connected with the coil, the measured rotating shaft is arranged in the stator coil, and the electric sensing circuit is electrically connected with the analysis processing unit.
3. The measuring device for detecting a shaft rotation angle according to claim 2, characterized in that: the electric induction elements are distributed on the main gear evenly.
4. A measuring device for detecting a rotation angle of a shaft according to claim 3, wherein: the induction angle range of each electric induction element is 0-120 degrees.
5. The measuring device for detecting a shaft rotation angle according to claim 1, characterized in that: the secondary gear is a magnetic part, the second sensing unit is a magnetic induction element capable of inducing the rotation of the magnetic part, and the magnetic induction element is electrically connected with the analysis processing unit.
6. The measuring device for detecting a shaft rotation angle according to claim 5, characterized in that: the induction angle range of the magnetic induction element is 0-360 degrees.
7. The measuring device for detecting a shaft rotation angle according to any one of claims 1 to 6, characterized in that: the gear speed reducing mechanism is arranged between the main gear and the auxiliary gear.
8. The measuring device for detecting a shaft rotation angle according to claim 7, characterized in that: the gear reduction mechanism comprises a first transmission gear meshed with the main gear and a second transmission gear which is coaxially arranged with the first transmission gear and meshed with the driven gear.
9. The measuring device for detecting a shaft rotation angle according to claim 8, characterized in that: the number of teeth of the first transmission gear is larger than that of the second transmission gear.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920440758.5U CN210014751U (en) | 2019-04-02 | 2019-04-02 | Measuring device for detecting rotation angle of shaft |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920440758.5U CN210014751U (en) | 2019-04-02 | 2019-04-02 | Measuring device for detecting rotation angle of shaft |
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| CN210014751U true CN210014751U (en) | 2020-02-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110044252A (en) * | 2019-04-02 | 2019-07-23 | 武汉理岩控制技术有限公司 | A kind of measuring device and measuring method for detection axis rotational angle |
| CN111897032A (en) * | 2020-08-11 | 2020-11-06 | 湖北生态工程职业技术学院 | Unknown precision correction method for tipping bucket type water quantity sensor based on unit time |
-
2019
- 2019-04-02 CN CN201920440758.5U patent/CN210014751U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110044252A (en) * | 2019-04-02 | 2019-07-23 | 武汉理岩控制技术有限公司 | A kind of measuring device and measuring method for detection axis rotational angle |
| CN111897032A (en) * | 2020-08-11 | 2020-11-06 | 湖北生态工程职业技术学院 | Unknown precision correction method for tipping bucket type water quantity sensor based on unit time |
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