Portable shafting circle grating precision automatic detection device and method of photoelectric theodolite

Abstract

The application relates to a portable shaft system circular grating precision automatic detection device and method of a photoelectric theodolite, which comprises a high-precision level, a detector rotor adapter, a shaft system rotor yoke, a high-precision detector, a detector connecting ring, a shaft system connecting ring, a shaft system centering chuck, a circular grating transition ring, a circular grating, a to-be-detected shaft system stator and a to-be-detected shaft system rotor. The platform adopted in the application can be adjusted through a coupling tooling piece to adapt to various circular grating models, the installation method is simple, and the platform is not limited by space. The tower difference is adjusted through a high-precision level and a three-leg lifting platform, automatic detection is realized along with the rotation of the photoelectric theodolite, the detection time is greatly shortened, precision detection of different sampling frequencies can be realized along with the change of the rotation speed of the photoelectric theodolite, sampling points are increased by improving the sampling frequency, human eye detection errors are eliminated, and the detection precision is improved.

Description

Technical Field

[0001] This invention relates to the field of photoelectric theodolite technology, and in particular to a portable automatic detection device and method for the accuracy of the axis circular grating of a photoelectric theodolite. Background Technology

[0002] Currently, the main circular grating inspection devices, whether for newly purchased or already installed on photoelectric theodolites, all utilize a combination of a polyhedron and an autocollimator collimator. The polyhedron is fixed to the theodolite plane, and levelness and coaxiality are ensured by adjusting the end runout and radial runout using a micrometer. Parallel light emitted from the collimator illuminates each face of the polyhedron and is reflected to the photoelectric receiver of the collimator. By reading the deviation value of the collimator, the angular deviation of each face of the polyhedron is determined, thus measuring the accuracy of the circular grating.

[0003] Existing circular grating inspection devices use a combination of a polyhedron and an autocollimator collimator for inspection, which has the following drawbacks: the inspection device has stringent requirements, needing sufficient space to install the polyhedron and collimator; the inspection process requires multiple rotations, repeatedly passing through the collimator and micrometer to monitor parameters such as tower eccentricity; the sampling points are limited, with the currently used 24-sided polyhedron providing only 24 sampling points; the sampling process requires observing and reading the deviation on each face of the 24-sided polyhedron, resulting in a long inspection time; and manual rotation is required for inspection. Summary of the Invention

[0004] The present invention aims to solve the technical problems in the prior art by providing a portable automatic detection device and method for the accuracy of the axis circular grating of an optoelectronic theodolite.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0006] A portable automatic detection device for the accuracy of a circular grating in an optoelectronic theodolite includes: a high-precision level, a detector rotor adapter, a shaft rotor fork, a high-precision detector, a detector connecting ring, a shaft connecting ring, a shaft centering chuck, a circular grating transition ring, a circular grating, a shaft stator to be inspected, and a shaft rotor to be inspected.

[0007] The high-precision level is fixed on the detector rotor adapter to control the entire detection device to be parallel to the axis of the shaft system; the detector rotor adapter is fixedly connected to the internal rotating part of the high-precision detector, the detector rotor adapter is fixedly connected to the shaft system rotor fork, and the shaft system rotor fork is fixedly connected to the shaft system rotor to be tested.

[0008] The stator part of the high-precision detector is connected to the detector connecting ring, and the centering of the two is achieved through the inner and outer stop structures;

[0009] The detector connecting ring and the shaft connecting ring are connected by a ball head and a ball head seat, and the axis of the detector connecting ring coincides with that of the shaft connecting ring;

[0010] The shaft connecting ring is placed on the stator of the shaft to be inspected, and the two are centered by the shaft centering chuck;

[0011] The detector connecting ring is equipped with three circumferentially distributed adjusting screws, which are used to adjust the tilt angle of the detector connecting ring by adjusting the depth of screwing into the threaded hole on the shaft connecting ring.

[0012] The circular grating is fixedly connected to the circular grating transition ring, and the circular grating transition ring is fixedly connected to the stator of the shaft system under test;

[0013] The rotational motion of the rotor of the shaft system under test can be transmitted to the rotor part of the high-precision detector through the rotor fork of the shaft system and the rotor adapter of the detector.

[0014] A quick-locking device is fixed to the side of the shaft connecting ring; after the detector connecting ring is adjusted to a suitable angle, the spring pin configured on the quick-locking device is moved so that it is embedded in the pin groove in the axial direction of the detector connecting ring, thereby achieving complete constraint between the detector connecting ring and the shaft connecting ring.

[0015] The automatic detection method of the portable axis circular grating accuracy automatic detection device for the above-mentioned photoelectric theodolite includes the following steps:

[0016] Step 1: Install the circular grating transition ring and the circular grating sequentially onto the stator of the shaft system to be inspected;

[0017] Step 2: Install the quick-locking device on the shaft connecting ring; place the shaft connecting ring on the shaft stator to be inspected, and use the shaft centering chuck to center and fix the two.

[0018] Step 3: Center the high-precision detector and the detector connecting ring stop and connect them together with screws; then align the ball head of the detector connecting ring with the ball head of the shaft connecting ring to achieve centering, and install the three adjusting screws and springs on the detector connecting ring;

[0019] Step 4: Connect the high-precision level and shaft rotor fork to the detector rotor adapter, and then connect the detector rotor adapter to the internal rotor of the high-precision detector; adjust the waist-shaped hole of the shaft rotor fork so that its other end is accurately fixed on the shaft rotor to be inspected.

[0020] Step 5: Rotate the rotor of the shaft system to be tested and observe the changes in the value of the high-precision level. Rotate the three adjusting screws on the detector connecting ring respectively, and repeat the above operation until the value of the high-precision level reaches the ideal value. After the adjustment is completed, move the spring pin on the quick locking device to make it embed into the pin groove in the axial direction of the detector connecting ring, so as to achieve complete constraint between the detector connecting ring and the shaft connecting ring.

[0021] Step 6: Zero the high-precision detector and the circular grating under test at any angle. As the photoelectric theodolite rotates, it achieves synchronous rotation and outputs two sets of angle values ​​in real time. These values ​​are sent to the display screen via serial port for observation of the deviation between the two sets of angle values. Data can also be recorded and data curves plotted by the host computer as the instrument rotates.

[0022] Step 7: After the test is completed, the data collected by the host computer is used to calculate the error curve. The linear compensation method is used for accuracy compensation. After the accuracy is verified and meets the index, the spring pin on the quick-locking device is moved to realize the overall disassembly of the automatic testing device.

[0023] In the above technical solution, the number of shaft rotor forks is at least two.

[0024] In the above technical solution, the number of quick-locking devices is at least two.

[0025] The present invention has the following beneficial effects:

[0026] The portable axis circular grating accuracy automatic detection device and method for photoelectric theodolites of the present invention utilizes a platform that can adapt to various circular grating models by adjusting the coupling tooling. The installation method is simple and not limited by space. A high-precision level and a three-legged lifting platform are used to adjust the tower difference. Automatic detection is achieved as the photoelectric theodolite rotates, greatly shortening the detection time. With different rotation speeds of the photoelectric theodolite, different sampling frequencies can be used to achieve accuracy detection. By increasing the sampling frequency, the number of sampling points is increased, and human eye detection errors are eliminated, thereby improving detection accuracy. Attached Figure Description

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0028] Figure 1 This is a two-dimensional schematic diagram of the portable axis circular grating accuracy automatic detection device for the photoelectric theodolite of the present invention.

[0029] Figure 2 This is a three-dimensional schematic diagram of the portable axis circular grating accuracy automatic detection device for the photoelectric theodolite of the present invention.

[0030] Figure 3This is a schematic diagram of the detection process of the portable axis circular grating accuracy automatic detection method for the photoelectric theodolite of the present invention.

[0031] The reference numerals in the figure are:

[0032] 1-High-precision level; 2-Detector rotor adapter; 3-Shaft rotor shift fork; 4-High-precision detector; 5-Detector connecting ring; 6-Shaft connecting ring; 7-Shaft centering chuck; 8-Circular grating transition ring; 9-Circular grating; 10-Shaft stator to be inspected; 11-Shaft rotor to be inspected; 12-Quick locking device. Detailed Implementation

[0033] The inventive concept of this invention is as follows: This invention aims to invent a detachable and easy-to-install circular grating accuracy detection device for photoelectric theodolites. It uses a Heidenhain RON285C encoder as a high-precision detector. Since the models of photoelectric theodolites are different, the corresponding models and sizes of the circular gratings to be tested are also different.

[0034] The device of the present invention can adapt to various circular grating models by adjusting the coupling tooling. It can adjust the level of the reference encoder by using a lifting platform and a high-precision level sensor. After adjusting some parameters, the angle information can be displayed on the screen, and the data can be recorded by the host computer for curve drawing and error calculation. With different rotation speeds of the photoelectric theodolite, different sampling frequencies can be used for accuracy detection.

[0035] The present invention will now be described in detail with reference to the accompanying drawings.

[0036] like Figure 1 and 2 As shown, the portable automatic detection device for the accuracy of the circular grating of the photoelectric theodolite of the present invention includes: a high-precision level 1 fixed on the detector rotor adapter 2, used to control the parallelism of the entire detection device with the axis of the axis system. The detector rotor adapter 2 is fixedly connected to the internal rotating part of the high-precision detector 4 by screws. The detector rotor adapter 2 is also fixedly connected to the axis system rotor fork 3 by screws, and the axis system rotor fork 3 is fixedly connected to the axis system rotor 11 to be tested by screws. This allows the rotational motion of the axis system rotor 11 to be tested to be transmitted to the rotor part of the high-precision detector 4 through the axis system rotor fork 3 and the detector rotor adapter 2. The number of axis system rotor forks 3 is at least two.

[0037] The stator of the high-precision detector 4 is connected to the detector connecting ring 5 by screws evenly distributed around its perimeter, and the centering of the two is achieved through an inner and outer stop structure. The detector connecting ring 5 and the shaft connecting ring 6 are connected by a ball head and a ball head seat, and their axes are ensured to coincide through strict tolerance requirements. The detector connecting ring 5 is equipped with three circumferentially distributed adjusting screws. By adjusting the depth of the three screws screwed into the threaded holes on the shaft connecting ring 6, the tilt angle of the detector connecting ring 5 can be adjusted. At least two quick-locking devices 12 are provided on both sides of the shaft connecting ring 6. The quick-locking devices 12 are fixed to the shaft connecting ring 6 by screws. After the detector connecting ring 5 is adjusted to a suitable angle, the spring pins on the quick-locking devices 12 are moved to engage with the pin grooves in the axial direction of the detector connecting ring 5, achieving complete constraint between the detector connecting ring 5 and the shaft connecting ring 6.

[0038] The shaft connecting ring 6 is placed on the shaft stator 10 to be inspected, and the two are centered by the shaft centering chuck 7. The circular grating 9 is fixedly connected to the circular grating transition ring 8, and the circular grating transition ring 8 is fixedly connected to the shaft stator 10 to be inspected.

[0039] refer to Figure 3 For example, the portable axis circular grating accuracy automatic detection method of the photoelectric theodolite of the present invention includes the following steps:

[0040] Step 1: Install the circular grating transition ring 8 and the circular grating 9 sequentially on the stator 10 of the shaft system to be inspected;

[0041] Step 2: Install the two quick-locking devices 12 on the shaft connecting ring 6; place the shaft connecting ring 6 on the shaft stator 10 to be inspected, and use the shaft centering chuck 7 to center and fix the two.

[0042] Step 3: Center the high-precision detector 4 and the detector connecting ring 5 and connect them together with screws; then align the ball head of the detector connecting ring 5 with the ball head of the shaft connecting ring 6 to achieve centering, and install the three adjusting screws and springs on the detector connecting ring 5.

[0043] Step 4: Connect the high-precision level 1 and the shaft rotor fork 3 to the detector rotor adapter 2, and then connect the detector rotor adapter 2 to the internal rotor of the high-precision detector 4; adjust the waist-shaped holes of the two shaft rotor forks 3 respectively, so that the other end is accurately fixed on the shaft rotor 11 to be inspected;

[0044] Step 5: Rotate the rotor 11 of the shaft system to be tested and observe the change in the value of the high-precision level 1. Rotate the three adjusting screws on the detector connecting ring 5 respectively, and repeat the above operation until the value of the high-precision level 1 reaches the ideal value. After the adjustment is completed, move the spring pins on the two quick locking devices 12 to make them embed into the pin grooves in the axial direction of the detector connecting ring 5, so as to achieve complete constraint between the detector connecting ring 5 and the shaft connecting ring 6.

[0045] Step 6: Zero the high-precision detector 4 and the circular grating 9 under test at any angle. As the photoelectric theodolite rotates, it achieves synchronous rotation and outputs two sets of angle values ​​in real time. These values ​​are sent to the display screen via serial port for observation of the deviation between the two sets of angle values. The host computer can also record data and plot data curves as the rotation progresses. While achieving automatic detection, different sampling data frequencies can be implemented to improve detection accuracy as the rotation speed of the photoelectric theodolite varies.

[0046] Step 7: After the test is completed, the data collected by the host computer is used to calculate the error curve through the step algorithm. After the accuracy is compensated by the linear compensation method, and the accuracy is verified to meet the index, the entire test device can be disassembled by simply moving the spring pins on the two quick locking devices 12. This is convenient, quick and can meet the high-precision test of any axis circular grating of any size in any scenario.

[0047] The portable axis circular grating accuracy automatic detection device and method for photoelectric theodolites of the present invention utilizes a platform that can adapt to various circular grating models by adjusting the coupling tooling. The installation method is simple and not limited by space. A high-precision level and a three-legged lifting platform are used to adjust the tower difference. Automatic detection is achieved as the photoelectric theodolite rotates, greatly shortening the detection time. With different rotation speeds of the photoelectric theodolite, different sampling frequencies can be used to achieve accuracy detection. By increasing the sampling frequency, the number of sampling points is increased, and human eye detection errors are eliminated, thereby improving detection accuracy.

[0048] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A portable automatic detection device for the accuracy of the circular grating in an optoelectronic theodolite, characterized in that, include: High-precision level (1), detector rotor adapter (2), shaft rotor shift fork (3), high-precision detector (4), detector connecting ring (5), shaft connecting ring (6), shaft centering chuck (7), circular grating transition ring (8), circular grating (9), shaft stator under test (10), shaft rotor under test (11); The high-precision level (1) is fixed on the detector rotor adapter (2) to control the entire detection device to be parallel to the axis of the shaft system; the detector rotor adapter (2) is fixedly connected to the internal rotating part of the high-precision detector (4), the detector rotor adapter (2) is fixedly connected to the shaft system rotor fork (3), and the shaft system rotor fork (3) is fixedly connected to the shaft system rotor (11) to be inspected; The stator part of the high-precision detector (4) is connected to the detector connecting ring (5), and the centering of the two is achieved through the inner and outer stop structures; The detector connecting ring (5) and the shaft connecting ring (6) are connected by a ball head and a ball head seat, and the axis of the detector connecting ring (5) and the axis of the shaft connecting ring (6) coincide. The shaft connecting ring (6) is placed on the shaft stator (10) to be inspected, and the two are centered by the shaft centering chuck (7); The detector connecting ring (5) is provided with three circumferentially distributed adjusting screws, which are used to adjust the tilt angle of the detector connecting ring (5) by adjusting the depth of screwing into the threaded hole on the shaft connecting ring (6); The circular grating (9) is fixedly connected to the circular grating transition ring (8), and the circular grating transition ring (8) is fixedly connected to the stator (10) of the shaft system to be inspected; The rotational motion of the rotor (11) of the shaft system under test can be transmitted to the rotor part of the high-precision detector (4) through the rotor fork (3) of the shaft system and the rotor adapter (2) of the detector. A quick-locking device (12) is fixed to the side of the shaft connecting ring (6); after the detector connecting ring (5) is adjusted to a suitable angle, the spring pin configured on the quick-locking device (12) is moved so that it is embedded in the pin groove in the axial direction of the detector connecting ring (5) to achieve complete constraint between the detector connecting ring (5) and the shaft connecting ring (6).

2. The portable automatic detection device for the accuracy of the circular grating of the photoelectric theodolite according to claim 1, characterized in that, The number of the shaft rotor forks (3) is at least two.

3. The portable automatic detection device for the accuracy of the circular grating of the photoelectric theodolite according to claim 1, characterized in that, The number of the quick-locking devices (12) is at least two.

4. An automatic detection method applicable to the portable axis circular grating accuracy automatic detection device of the photoelectric theodolite as described in claim 1, characterized in that, Includes the following steps: Step 1: Install the circular grating transition ring (8) and the circular grating (9) sequentially on the stator (10) of the shaft system to be inspected; Step 2: Install the quick locking device (12) on the shaft connecting ring (6); place the shaft connecting ring (6) on the shaft stator (10) to be inspected, and use the shaft centering chuck (7) to center and fix the two. Step 3: Center the high-precision detector (4) and the detector connecting ring (5) together with screws; then align the ball head of the detector connecting ring (5) with the ball head of the shaft connecting ring (6) to achieve centering, and install the three adjusting screws and springs on the detector connecting ring (5); Step 4: Connect the high-precision level (1) and the shaft rotor fork (3) to the detector rotor adapter (2), and then connect the detector rotor adapter (2) to the internal rotor of the high-precision detector (4); adjust the waist-shaped hole of the shaft rotor fork (3) so that its other end is accurately fixed on the shaft rotor (11) to be inspected; Step 5: Rotate the rotor (11) of the shaft system to be tested, observe the change in the value of the high-precision level (1), rotate the three adjusting screws on the detector connecting ring (5) respectively, and repeat the above operation until the value of the high-precision level (1) reaches the ideal. After adjustment, move the spring pin on the quick locking device (12) to insert it into the pin groove in the axial direction of the detector connecting ring (5) to achieve complete constraint between the detector connecting ring (5) and the shaft connecting ring (6); Step 6: Zero the high-precision detector (4) and the circular grating (9) under test at any angle. The photoelectric theodolite rotates synchronously and outputs two sets of angle values ​​in real time. The values ​​are sent to the display screen through the serial port to observe the deviation between the two sets of angle values. The host computer can record the data and draw the data curve as the instrument rotates. Step 7: After the test is completed, the data collected by the host computer is used to calculate the error curve. The linear compensation method is used for accuracy compensation. After the accuracy is verified and the index is met, the spring pin on the quick locking device (12) is moved to realize the overall disassembly of the automatic testing device.

5. The automatic detection method according to claim 4, characterized in that, The number of the shaft rotor forks (3) is at least two.

6. The automatic detection method according to claim 4, characterized in that, The number of the quick-locking devices (12) is at least two.

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