CN220670450U - Measuring device and measuring system for detecting rotational return difference - Google Patents

Measuring device and measuring system for detecting rotational return difference Download PDF

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Publication number
CN220670450U
CN220670450U CN202322401371.8U CN202322401371U CN220670450U CN 220670450 U CN220670450 U CN 220670450U CN 202322401371 U CN202322401371 U CN 202322401371U CN 220670450 U CN220670450 U CN 220670450U
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China
Prior art keywords
difference
measurement
distance
rotatable element
rotation
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CN202322401371.8U
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Chinese (zh)
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张彤
吴昊
叶奇
王小峰
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Fermi Instruments Shanghai Co ltd
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Fermi Instruments Shanghai Co ltd
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Abstract

The present disclosure provides a measurement device and measurement system for detecting rotational return stroke difference, the measurement device comprising: a reflection plate for being mounted on the rotatable member to be measured and rotatable with the rotatable member; a laser range finder for emitting laser light to the reflecting plate before and after rotation of the rotatable member and receiving the laser light reflected from the reflecting plate to detect a distance difference of the reflecting plate, the distance difference being used to calculate a return difference of the rotatable member.

Description

Measuring device and measuring system for detecting rotational return difference
Technical Field
The disclosure relates to the field of measurement technology, and in particular, to a measurement device and a measurement system for detecting a rotation return difference.
Background
When the existing angle optical measuring instrument is used for measuring the return stroke difference of a gear of a non-fully closed loop system, only the return stroke difference of gears or rotating shafts with normal sizes can be measured, and for some smaller gears and rotating shafts (for example, gears or rotating shafts with diameters of 15mm-35 mm), the space for building test equipment is insufficient, so that the test is difficult to carry out. Therefore, the test pinion return stroke difference is difficult to achieve in the prior art, and the test operation is cumbersome.
Disclosure of Invention
The present disclosure provides a measurement device for detecting rotational return difference, comprising: a reflection plate for being mounted on the rotatable member to be measured and rotatable with the rotatable member; a laser range finder for emitting laser light to the reflecting plate before and after rotation of the rotatable member and receiving the laser light reflected from the reflecting plate to detect a distance difference of the reflecting plate, the distance difference being used to calculate a return difference of the rotatable member.
In some embodiments, the longitudinal direction of the reflective plate passes through the center of rotation of the rotatable element.
In some embodiments, the laser rangefinder is configured to measure the first distance before the rotatable element rotates; the laser rangefinder is configured to measure a second distance after rotation of the rotatable element, wherein the distance difference is equal to a difference between the first distance and the second distance, and is configured to calculate a return difference of the rotatable element via a trigonometric function.
In some embodiments, a laser rangefinder includes: a laser for emitting a laser beam; and a sensor for receiving the laser beam reflected from the reflection plate and generating a sensor signal.
In some embodiments, the measuring device for detecting a rotational return difference further comprises: and the measuring controller is connected with the sensor and used for calculating the distance or the distance difference between the reflecting plate and the laser range finder based on the sensor signal and the triangulation principle or the flight time principle, and the measuring controller is also used for calculating the return stroke difference of the rotatable element based on the distance difference.
In some embodiments, the measurement controller is configured to control the laser rangefinder to make the first measurement prior to rotation of the rotatable element; and the measurement controller is for controlling the laser rangefinder to take a second measurement after rotation of the rotatable element.
The present disclosure provides a measurement system comprising: a rotatable element; a rotation controller connected to the rotatable member for controlling rotation of the rotatable member; and a measuring device for detecting a rotational return difference as in any of the examples for measuring a return difference of the rotatable element.
In some embodiments, the rotation controller is used to control one or more rotations of the rotatable element.
In some embodiments, the measurement system further comprises: and the output end of the driving motor is connected with the rotatable element and is used for driving the rotatable element to rotate in the rotation controller.
In some embodiments, the rotation controller is configured to control the drive motor to drive the rotatable element to rotate in a forward or reverse direction based on the return difference to compensate for the return difference.
Measurement devices for detecting rotational return differences according to some embodiments of the present disclosure can provide beneficial technical effects. For example, the measurement device for detecting rotational return stroke differences of some embodiments of the present disclosure can address one or more of the following problems in the conventional art: the method has the advantages that the return stroke difference of the small-size gears and the rotating shafts is difficult to measure, the measuring steps are complicated, and the technical effects of measuring the return stroke difference of gears with more sizes and the rotating shafts, along with simple testing steps, higher testing precision, small calculated amount and high testing efficiency can be realized.
Measurement systems according to some embodiments of the present disclosure can provide beneficial technical effects. For example, the measurement system of some embodiments of the present disclosure can address one or more of the following problems in the conventional art: the small-size gear and the rotating shaft are difficult to measure the return stroke difference, the measuring step is complicated, the return stroke difference cannot be corrected, the technical effects of measuring the return stroke difference of gears with more sizes and the rotating shaft, the testing step is simple, the testing precision is high, and the return stroke difference can be corrected and zeroed according to the measuring result can be achieved.
Drawings
In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is apparent that the drawings in the following description are only one embodiment of the present disclosure, and other drawings may be obtained according to these drawings without inventive effort to those of ordinary skill in the art.
Fig. 1 illustrates a schematic structural diagram of a measurement device according to some embodiments of the present disclosure.
FIG. 2 shows a schematic structural view of a measurement device according to further embodiments of the present disclosure;
FIG. 3 shows a schematic structural view of a measurement device according to further embodiments of the present disclosure;
fig. 4 illustrates a schematic structural diagram of a measurement system according to some embodiments of the present disclosure.
In the above drawings, each reference numeral represents:
100. 2100, 3100 measuring device for detecting rotational return difference
10. 310 reflecting plate
20. 220, 320 laser range finder
21. 321 laser
22. 322 sensor
330. Measurement controller
200. 2200, 3200 rotatable element
300. Rotary controller
400. Driving motor
1000. Measuring system
Detailed Description
Some embodiments of the present disclosure will be described below with reference to the accompanying drawings. It will be apparent that the described embodiments are merely exemplary embodiments of the present disclosure and not all embodiments.
In the description of the present disclosure, it should be noted that the positional or positional relationship indicated by the terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "top", "bottom", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present disclosure. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present disclosure, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "coupled," and "coupled" are to be construed broadly, and may be either a fixed connection or a removable connection, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium; may be a communication between the interiors of the two elements.
Fig. 1 illustrates a schematic structural diagram of a measurement device 100 according to some embodiments of the present disclosure.
As shown in fig. 1, a measuring device 100 for detecting a rotation return difference (hereinafter, simply referred to as a measuring device 100) may include a reflection plate 10 and a laser range finder 20. The reflection plate 10 can be used to be mounted on the rotatable member 200 to be measured and can be rotated with the rotatable member 200. The laser rangefinder 20 can be used to emit laser light to the reflection plate 10 before the rotation of the rotatable member 200 and after the rotation of the rotatable member 200 and receive the laser light reflected from the reflection plate 10 to detect a distance difference before and after the rotation of the reflection plate 10, the distance difference being used to calculate a return stroke difference of the rotatable member 200.
As shown in fig. 1, in some embodiments of the present disclosure, the longitudinal direction of the reflection plate 10 passes through the rotation center of the rotatable member 200. The reflection plate 10 may be fixed to the rotation center of the rotatable member 200 to be rotatable together with the rotatable member 200. The reflection plate 10 can intuitively reflect a return difference generated during rotation of the rotatable member 200, and the reflection plate 10 extends from the rotation center of the rotatable member 200 to facilitate measurement.
As shown in fig. 1, in some embodiments of the present disclosure, a laser rangefinder 20 may include a laser 21 and a sensor 22. The laser 21 can be used to emit a laser beam, and the sensor 22 can be used to receive the laser beam reflected from the reflection plate 10 and generate a sensor signal. The laser 21 emits a laser beam toward the reflecting plate 10, and the reflected beam after the laser beam reaches the reflecting plate 10 is collected by the sensor 22 to generate a sensor signal.
As shown in fig. 1, in some embodiments of the present disclosure, a laser rangefinder 20 can be used to measure a first distance a1 prior to rotation of the rotatable element 200. The laser rangefinder 20 can be used to measure the second distance a2 after rotation of the rotatable element 200. The laser 21 emits a laser beam toward the reflecting plate 10, and the reflected beam after the laser beam reaches the reflecting plate 10 is collected by the sensor 22, generating a sensor signal, and measuring the first distance a1 and the second distance a2 according to the sensor signal and a time-of-flight principle (e.g., laser time-of-flight). Those skilled in the art will appreciate that the laser rangefinder 20 may measure distance in other ways, and the present disclosure is not limited in this regard.
In some embodiments of the present disclosure, L1 is the length of the reflective plate 10, and the distance difference is equal to the difference between the first distance a1 and the second distance a2, and can be used to calculate the return difference of the rotatable element 200 by a trigonometric function, where the calculation formula of the return difference is: arctan [ (a 1-a 2)/L1 ]. For example, the length of the reflecting plate 10 is l1=14 mm, and during the test, the laser rangefinder 20 measures a first distance a1= 5.631mm before the rotatable member 200 rotates, and measures a second distance a2= 5.533mm after the rotatable member 200 rotates once, and the return difference is arctan [ (a 1-a 2)/L1 ] =0.401 °.
In some embodiments of the present disclosure, the first distance a1 and the second distance a2 are measured by the laser rangefinder 20 with the length of the reflection plate 10 fixed, and the backhaul difference is calculated using a trigonometric function, the measurement method is simple, the calculation amount is small, and the measurement efficiency is high. For ease of illustration, in fig. 1 and 3, the first distance a1 and the second distance a2 are shown spaced apart, but it will be understood by those skilled in the art that the first distance a1 and the second distance a2 should coincide with the measuring light path.
In addition, in some embodiments of the present disclosure, the rotation accuracy calculation may be performed by a2 and L1 obtained by multiple measurements, and the calculation formula of the rotation accuracy is: arctan [ (a 1max-a2 min)/L1 ]. For example, the reflection plate length l1=14 mm, and data of the first distance a1 and the second distance a2 measured by the laser rangefinder 20 are shown in table 1.
TABLE 1 measurement data table of first distance a1 and second distance a2
1 2 3 4 5
a1 5.683mm 5.672mm 5.686mm 5.687mm 5.686mm
a2 5.673mm 5.668mm 5.672mm 5.686mm 5.686mm
As shown in table 1, a1max=5.686 mm, a2min= 5.668mm, and the rotation accuracy was arctan [ (a 1max-a2 min)/L1 ] =0.073 °.
Those skilled in the art will appreciate that while in some embodiments of the present disclosure, the laser rangefinder 20 is disposed in the position shown in fig. 1, this is merely exemplary. In some embodiments of the present disclosure rotatable element 200 is a gear, and in other embodiments of the present disclosure rotatable element may be other rotatable elements requiring measurement of return stroke difference, such as rotating shaft 2200 as shown in fig. 2.
The laser rangefinder 220 is adjusted to the position shown in fig. 2 (reflector not shown for convenience), and the measuring device 2100 may measure the return stroke difference of the rotatable element 2200.
Fig. 3 shows a schematic structural view of a measuring device 3100 according to further embodiments of the present disclosure.
As shown in fig. 3, in other embodiments of the present disclosure, the measuring device 3100 may include a reflector 310 and a laser rangefinder 320. The laser rangefinder 320 may include a laser 321 and a sensor 322. The laser 321 can be used to emit a laser beam, and the sensor 322 can be used to receive the laser beam reflected from the reflection plate 310 and generate a sensor signal. The laser 321 emits a laser beam toward the reflection plate 310, and the reflected beam after the laser beam reaches the reflection plate 310 is collected by the sensor 322 to generate a sensor signal.
The laser rangefinder 320 may also include a processor 323. A processor 323 may be coupled to the sensor 322 and can be used to calculate the distance difference of the reflecting plate 310 to the laser rangefinder 320 based on the multiple sensor 322 signals and the triangulation principle. For example, laser rangefinder 320 may take a first measurement before rotatable element 3200 rotates to obtain a first sensor signal, and a second measurement after rotatable element 3200 rotates to obtain a second sensor signal. The first sensor signal and the second sensor signal may include the position of the reflected laser light on the sensor 322 in the first measurement and the second measurement, respectively. Based on the position changes of the first sensor signal and the second sensor signal, the distance difference between the reflective plate 310 and the laser rangefinder 320 between the first measurement and the second measurement can be calculated by the principle of triangulation.
In some embodiments of the present disclosure, the processor 323 may also be used to calculate the distance of the reflective sheet 310 to the laser rangefinder 320 based on the sensor signals and time of flight principles. For example, after laser 321 of laser range finder 320 emits laser light, laser echo detection is performed by sensor 322 and a sensor signal is generated. The distance of the reflecting plate 310 to the laser rangefinder 320 is calculated from the time of flight of the laser light included in the sensor signal from the laser 321 to the reflecting plate 310 and back to the sensor 322.
In some embodiments of the present disclosure, the measurement device 3100 may further comprise a measurement controller 330 for obtaining or calculating a distance difference, and also for calculating a return difference of the rotatable element 3200 based on the distance difference.
In some embodiments of the present disclosure, the measurement controller 330 can be used to control the laser rangefinder 320 to make a first measurement prior to rotation of the rotatable element 3200. And the measurement controller 330 can be used to control the laser rangefinder 320 to make a second measurement after rotation of the rotatable element 3200.
The measurement controller 330 may obtain or calculate a distance difference by calculating the results of the first measurement and the second measurement, and calculate a return difference of the rotatable element 3200 from the distance difference.
Fig. 4 illustrates a schematic diagram of a measurement system 1000 according to some embodiments of the present disclosure.
As shown in fig. 4, the measurement system 1000 may include a rotatable element 200, a rotational controller 300, and a measurement device 100. The rotation controller 300 is connected to the rotatable element 200 and can be used to control the rotation of the rotatable element 200. The measurement device 100 can be used to measure the return difference of the rotatable element 200. The rotary controller 300 can be used to control one or more rotations of the rotatable element 200.
As shown in fig. 4, in some embodiments of the present disclosure, the measurement system 1000 may further include a drive motor 400. An output of the driving motor 400 is connected to the rotatable member 200, and can be used to drive the rotatable member 200 to rotate under the control of the rotation controller 300. The rotation controller 300 can be used to control the driving motor 400 to drive the rotatable element 200 to rotate in the forward or reverse direction based on the return stroke difference to compensate for the return stroke difference. After the rotatable element 200 is operated for a period of time, the return difference of the rotatable element 200 can be measured by the measuring device 100, and after the measurement, the return difference of the rotatable element can be compensated by the rotation controller 300 to ensure the operation of the equipment.
It should be noted that the foregoing is merely exemplary embodiments of the present disclosure and are not intended to limit the present disclosure, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the present disclosure are intended to be included within the scope of the present disclosure.

Claims (10)

1. A measurement device for detect rotation return difference, characterized by comprising:
a reflection plate for being mounted on a rotatable member to be measured and rotatable with the rotatable member;
a laser range finder for emitting laser light to the reflecting plate before rotation of the rotatable member and after rotation of the rotatable member and receiving the laser light reflected from the reflecting plate to detect a distance difference of the reflecting plate, the distance difference being used to calculate a return stroke difference of the rotatable member.
2. The measurement device for detecting a rotational return difference according to claim 1, wherein a longitudinal direction of the reflection plate passes through a rotation center of the rotatable element.
3. The measurement device for detecting rotational return differences as claimed in claim 1, wherein the laser rangefinder is adapted to measure a first distance before the rotatable element is rotated;
the laser rangefinder is configured to measure a second distance after rotation of the rotatable element,
wherein the distance difference is equal to a difference between the first distance and the second distance for calculating a return difference of the rotatable element by a trigonometric function.
4. The measurement device for detect rotational return difference of claim 1, wherein the laser rangefinder comprises:
a laser for emitting a laser beam; and
and a sensor for receiving the laser beam reflected from the reflection plate and generating a sensor signal.
5. The measurement device for detect rotational return difference of claim 4, wherein the laser rangefinder further comprises:
and the processor is connected with the sensor and is used for calculating the distance difference between the reflecting plate and the laser range finder based on a plurality of sensor signals and a triangulation principle or calculating the distance between the reflecting plate and the laser range finder based on the sensor signals and a time-of-flight principle.
6. The measurement device for detect rotational return difference of claim 5, further comprising:
a measurement controller for controlling the laser rangefinder to make a first measurement before the rotatable element rotates; and the measurement controller is configured to control the laser rangefinder to make a second measurement after rotation of the rotatable element, the measurement controller being configured to obtain or calculate the distance difference based on the first measurement and the second measurement, and to calculate a return difference of the rotatable element based on the distance difference.
7. A measurement system, comprising:
a rotatable element;
a rotation controller connected to the rotatable member for controlling rotation of the rotatable member; and
the measurement device for detecting rotational return stroke difference as claimed in any one of claims 1 to 6 for measuring return stroke difference of said rotatable element.
8. The measurement system of claim 7, wherein the rotation controller is configured to control one or more rotations of the rotatable element.
9. The measurement system of claim 8, further comprising:
and the output end of the driving motor is connected with the rotatable element and is used for driving the rotatable element to rotate under the control of the rotation controller.
10. The measurement system of claim 9, wherein the rotation controller is configured to control the drive motor to drive the rotatable element to rotate in a forward or reverse direction based on the return difference to compensate for the return difference.
CN202322401371.8U 2023-09-05 2023-09-05 Measuring device and measuring system for detecting rotational return difference Active CN220670450U (en)

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Application Number Priority Date Filing Date Title
CN202322401371.8U CN220670450U (en) 2023-09-05 2023-09-05 Measuring device and measuring system for detecting rotational return difference

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Application Number Priority Date Filing Date Title
CN202322401371.8U CN220670450U (en) 2023-09-05 2023-09-05 Measuring device and measuring system for detecting rotational return difference

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CN220670450U true CN220670450U (en) 2024-03-26

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