Device for measuring rotation angle by using pull rope sensor
By designing a rope pulling sensor device for rotation angle measurement, the winding path of the rope is controlled, and the measurement accuracy problem when the angle encoder cannot be installed at the center of the slewing position is solved, and high-precision and low-cost rotation angle measurement is achieved.
Patent Information
- Application Number
- CN202422226715.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-11
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-09-11
AI Technical Summary
When the angular encoder cannot be installed at the center of the slewing position, it is difficult to achieve high-precision slewing angle measurement, and the winding error of the pull rope sensor affects the measurement accuracy.
A device for measuring the rotation angle with a draw rope sensor is designed. By setting a wire groove and pin hole on the fixed base, the winding path of the draw rope is controlled to make it close to the standard circumference, so as to accurately convert the rope length to the circumference and realize angle measurement.
This device effectively controls the winding error of the pull rope sensor, ensures high-precision measurement of the rotation angle, and meets the high-precision, low-cost and easy-to-implement angle measurement requirements of new energy and driverless car EMC and EMI performance detection equipment.
Smart Images
Figure CN223021174U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a device for measuring the rotation angle, in particular to a device for measuring the rotation angle with a wire rope sensor. Background Art
[0002] With the rapid development of new energy and driverless vehicle technologies, the market demand for EMC (electromagnetic compatibility) and EMI (electromagnetic interference) performance detection equipment for vehicles supporting advanced driving functions is increasing. During the vehicle testing process, in addition to driving at a certain speed, the vehicle is required to rotate reciprocally 360 degrees following a turntable, and the rotation angle of the turntable rotation mechanism needs to be accurately measured to achieve a precise evaluation of the vehicle performance.
[0003] Currently, for the angle measurement of the rotation mechanism, the prior art realizes it by installing an angle encoder at the rotation center position. When the rotation center position cannot be avoided from being occupied, it is not easy to implement this solution. At the same time, there are no conditions for installing an encoder on the drive motor or borrowing the rotation gear to install an encoder. In such a situation, it is necessary to rely on other devices to achieve the measurement of the rotation angle, and the accuracy and manufacturing cost should also be synchronized with the traditional devices.
[0004] There are also applications in the prior art that use a wire rope sensor to measure the rotation angle, but the winding length error of the wire rope on the rotation circumference directly affects the accuracy of the angle measurement. Summary of the Utility Model
[0005] To solve the above technical problems, the utility model provides a device for measuring the rotation angle with a wire rope sensor. The device effectively controls the winding error of the wire rope sensor, making the winding of the wire rope on the rotation circumference approximately close to a standard circumference, so as to ensure that the released rope length can be converted into the theoretical winding circumference, and then converted into the rotation angle through the conversion formula between the circumference and the angle, ensuring the measurement accuracy of the rotation angle.
[0006] Specifically, the following technical solutions are included:
[0007] The utility model provides a device for measuring the rotation angle with a wire rope sensor, including a fixed base and a rotatable turntable installed on the fixed base. The turntable is fixedly connected with a mounting bracket, and the mounting bracket is provided with a wire rope sensor; an outer circumference of the fixed base close to the turntable is provided with a wire groove, and a wire rope is wound in the wire groove; a pin hole is provided at the fixed base close to the wire groove, and a fixing pin is arranged in the pin hole, and the fixing pin is located in the wire groove; one end of the wire rope is connected with the fixing pin, and the other end is connected with the wire rope sensor.
[0008] In an embodiment of the present utility model, the fixed base is fixed on the ground or the base, and the rotating table is connected to the fixed base through a slewing bearing or a bearing.
[0009] In an embodiment of the present utility model, the fixed base is of a cylindrical structure, and the wire groove is arranged in a circle on the outer periphery of the fixed base.
[0010] In an embodiment of the present utility model, the wire groove is of a circular structure.
[0011] In an embodiment of the present utility model, the pin hole is tangent to the circumferential surface of the bottom of the wire groove.
[0012] In an embodiment of the present utility model, the fixing pin is provided with a groove, and the end of the pulling rope is wound in the groove.
[0013] In an embodiment of the present utility model, the pulling rope between the pulling rope sensor and the wire groove of the fixed base is tangent to the circumferential surface of the bottom of the wire groove.
[0014] In an embodiment of the present utility model, the pulling rope is parallel to the bottom surface of the rotating table.
[0015] The present utility model has the following beneficial effects:
[0016] A device for measuring the slewing angle with a pulling rope sensor provided by the present utility model is simple and practical, and has a low manufacturing cost. The device effectively controls the winding error of the pulling rope sensor, and makes the winding of the pulling rope on the slewing circumference approximately close to a standard circumference, so as to ensure that the released rope length can be converted into the theoretical winding circumference, and then converted into the slewing angle through the conversion formula between the circumference and the angle, ensuring the measurement accuracy of the slewing angle. The device realizes the accurate measurement of the slewing angle by using the pulling rope sensor, and effectively solves the problem of the winding surface error of the pulling rope caused by the installation of the rope head, effectively controlling the angle measurement deviation caused thereby. Moreover, the device can realize the high-precision and low-cost measurement of the slewing angle without occupying the slewing center position and without installing an encoder on the driving motor or the slewing gear, meeting the requirements of new energy and driverless vehicle EMC and EMI performance detection equipment for high-precision, low-cost and easy-to-realize angle measurement. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 is a perspective view of the device for measuring the slewing angle with a pulling rope sensor provided by the present utility model.
[0018] Figure 2 is another perspective view of the device for measuring the slewing angle with a pulling rope sensor provided by the present utility model.
[0019] Figure 3 For Figure 2 an enlarged view of A in
[0020] Figure 4 is a perspective view of the fixing pin provided by the present utility model.
[0021] In the figure: 1, rotating table; 2, fixed base; 3, mounting bracket; 4, cable tension sensor; 5, cable; 6, fixing pin; 7, groove; 8, wire groove; 9, pin hole. Specific embodiments
[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0023] In the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0024] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include the first and second features not being in direct contact but being in contact through other features therebetween. Moreover, the first feature being "above", "above", and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "below", and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.
[0025] Such as Figures 1-4As shown in the figure, the present utility model provides a device for measuring the rotation angle with a cable tension sensor, which includes a fixed base 2 and a rotating table 1 mounted on the fixed base 2 and capable of rotating. The rotating table 1 is fixedly connected with a mounting bracket 3, and the mounting bracket 3 is provided with a cable tension sensor 4. A wire groove 8 is formed on the outer periphery of the fixed base 2 near the rotating table 1, and a cable 5 is wound in the wire groove 8. A pin hole 9 is provided on the fixed base 2 near the wire groove 8, and a fixing pin 6 is arranged in the pin hole 9. The fixing pin 6 is located in the wire groove 8. One end of the cable 5 is connected to the fixing pin 6, and the other end is connected to the cable tension sensor 4.
[0026] In this embodiment, the cable tension sensor 4 is fixed on the rotating table 1 through the mounting bracket 3 and can rotate together with the rotating table 1.
[0027] In some embodiments, the fixed base 2 is fixed on the ground or the base table, and the rotating table 1 and the fixed base 2 are connected by a slewing bearing or a bearing, so as to realize relative rotation.
[0028] In some embodiments, the fixed base 2 is of a cylindrical structure, and the wire groove 8 is arranged in a circle on the outer periphery of the fixed base 2.
[0029] Furthermore, the wire groove 8 is of a circular structure.
[0030] In some embodiments, the pin hole 9 is tangent to the circumferential surface of the bottom of the wire groove 8. Through this setting, the fixing pin 6 can be perpendicular to the circumferential direction of the wire groove 8.
[0031] In some embodiments, the fixing pin 6 is provided with a groove 7, and the end of the cable 5 is wound in the groove 7.
[0032] In some embodiments, the cable 5 between the cable tension sensor 4 and the wire groove 8 of the fixed base 2 is tangent to the circumferential surface of the bottom of the wire groove 8.
[0033] The device for measuring the rotation angle with a cable tension sensor provided by the present utility model effectively controls the winding error of the cable tension sensor 4, makes the winding of the cable 5 on the rotation circumference approximately close to a standard circumference, and ensures the measurement accuracy of the rotation angle.
[0034] In some embodiments, the cable 5 is parallel to the bottom surface of the rotating table 1.
[0035] In this embodiment, the installation requirement of the cable tension sensor 4 is that the cable 5 must be tangent to the circumferential surface of the bottom of the wire groove 8 of the fixed base 2, and the cable 5 is parallel to the bottom surface of the rotating table 1.
[0036] The device for measuring the rotation angle with a pull - rope sensor provided by the utility model can realize the winding of the pull - rope 5 on the wire groove 8 of the fixed base 2, and can ensure that the winding path is infinitely close to a circle, so as to ensure that the released rope length can be converted into the theoretical circumference of the winding circle, and then be converted into the rotation angle through the conversion formula between the circumference and the angle.
[0037] In summary, the device for measuring the rotation angle with a pull - rope sensor provided by the utility model is simple and practical, with low manufacturing cost. The device uses a pull - rope sensor to achieve accurate measurement of the rotation angle, and effectively solves the problem of the winding surface error of the pull - rope caused by the installation of the rope head, and effectively controls the angle measurement deviation caused thereby. Moreover, the device can achieve high - precision and low - cost rotation angle measurement without occupying the rotation center position and without installing an encoder on the driving motor or the rotating gear, meeting the requirements of high - precision, low - cost, and easy - to - implement angle measurement for new energy and driverless vehicle EMC and EMI performance detection equipment.
[0038] The technical features of the above - mentioned embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above - mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.
[0039] The above - mentioned embodiments only express several implementation manners of the utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the utility model, several deformations and improvements can be made, and these all belong to the protection scope of the utility model.
[0040] Specific embodiments are used in this article to elaborate on the principle and implementation manner of the utility model. The description of the above - mentioned embodiments is only used to help understand the method and its core idea of the utility model. It should be pointed out that for those of ordinary skill in the technical field, without departing from the principle of the utility model, several improvements and modifications can be made to the utility model, and these improvements and modifications also fall within the protection scope of the claims of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.
Claims
1. A device for measuring a rotation angle using a draw-wire sensor, characterized in that: It includes a fixed base and a rotating table installed on the fixed base and rotatable, the rotating table is fixedly connected to a mounting bracket, and the mounting bracket is installed with a pull rope sensor; a wire groove is opened on the outer periphery of the fixed base close to one side of the rotating table, and a pull rope is wound in the wire groove; a pin hole is provided on the fixed base close to the wire groove, a fixing pin is provided in the pin hole, and the fixing pin is located in the wire groove; one end of the pull rope is connected to the fixing pin, and the other end is connected to the pull rope sensor.
2. The device for measuring the rotation angle using a draw wire sensor according to claim 1, characterized in that: The fixed base is fixed on the ground or a base, and the rotating platform is connected to the fixed base via a slewing bearing or a bearing.
3. The device for measuring the rotation angle using a draw wire sensor according to claim 2, characterized in that: The fixed base is a cylindrical structure, and the wire groove is arranged in a circle around the outer circumference of the fixed base.
4. The device for measuring the rotation angle using a draw wire sensor according to claim 3, characterized in that: The wire trough is a circular structure.
5. The device for measuring the rotation angle using a draw wire sensor according to claim 4, characterized in that: The pin hole is tangent to the circumferential surface of the groove bottom of the wire groove.
6. The device for measuring the rotation angle using a draw wire sensor according to claim 2, characterized in that: The fixing pin is provided with a groove, and the end of the pull rope is wound in the groove.
7. The device for measuring the rotation angle using a draw wire sensor according to claim 6, characterized in that: The pull rope between the pull rope sensor and the wire groove of the fixed base is tangent to the groove bottom circumferential surface of the wire groove.
8. The device for measuring the rotation angle using a draw wire sensor according to any one of claims 1 to 7, characterized in that: The pull rope is parallel to the bottom surface of the rotating platform.