High-speed grating performance testing device

Abstract

The utility model relates to the technical field of grating performance testing, and particularly discloses a high-speed grating performance testing device, which comprises a testing motor, an output shaft of the testing motor is provided with a grating disc to be tested; a reference encoder which is installed on the test motor and is used for measuring the actual rotation amount of the test motor; the shading part is used for carrying a light-emitting element and a light-sensitive element to be detected; the moving assembly is used for carrying the shading cloth part and can drive the shading part to do linear translational motion along the X axis, the Y axis and the Z axis in the three-dimensional space; the temperature control part is used for wrapping the shading part and changing the temperature in the shading part; the test host is electrically connected with the reference encoder and the photosensitive element; according to the utility model, measurement errors at different installation distances can be obtained, the measurement precision of the high-speed grating encoder applied to the high-speed environment measurement work in the later period is ensured, and the production quality of the high-speed grating encoder is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of grating performance testing, in particular to a high-speed grating performance testing device. Background Art

[0002] The grating encoder is a sensor that converts the mechanical geometric displacement on the output shaft into pulses or digital quantities through photoelectric conversion. It is widely used in the measurement of speed, distance, angle, and position.

[0003] The grating encoder is mainly composed of a grating disk, a light-emitting element and a photosensitive element. The grating disk is installed on the rotating shaft of the grating encoder to act as a rotor, and the light-emitting element and the photosensitive element are installed on the housing of the encoder to act as a stator. The grating disk is a disk engraved with regular light-transmitting and opaque lines. The rotation of the grating disk can block the intermittent illumination of the light source on the photosensitive element. The light flux received by the photosensitive element changes synchronously with the light-transmitting lines, and the output waveform is shaped into a pulse signal. By calculating the changes in these pulse signals, the displacement of the device can be accurately measured and controlled.

[0004] Grating encoders are often used in speed measurement of high-speed rotating motors. In the production of grating encoders, high installation accuracy is required for each component in the grating encoder used for highly rotating measurement operations. How to simulate the real high-speed working environment and obtain the installation tolerance range of the components in the grating encoder is a technical problem that needs to be solved urgently. Utility Model Content

[0005] In view of the above problems, the utility model provides a high-speed grating performance testing device, the purpose of which is to ensure the installation accuracy and measurement accuracy of the high-speed grating encoder.

[0006] In order to achieve the above-mentioned invention object, the technical solution adopted by the utility model is as follows:

[0007] Provided is a high-speed grating performance test device, comprising: a test motor, the output shaft of the test motor is equipped with a grating disk to be tested; a reference encoder, installed on the test motor and used for measuring the actual rotation amount of the test motor; a shading component, used for carrying a light-emitting element and a photosensitive element to be tested; a moving component, used for carrying a shading cloth component, capable of driving the shading component to perform linear translational motion along an X-axis, a Y-axis and a Z-axis in a three-dimensional space; a temperature control component, used for wrapping the shading component and changing the temperature inside the shading component; and a test host, electrically connected to the reference encoder and the photosensitive element.

[0008] Furthermore, the moving component includes: a slide rail, including a first slide rail, a second slide rail and a third slide rail, which are installed along the X-axis, the Y-axis and the Z-axis respectively; a moving platform, including a first platform, a second platform and a third platform, which are slidably installed on the first slide rail, the second slide rail and the third slide rail respectively; wherein the second platform is fixedly arranged on the first platform, the third platform is fixedly arranged on the second platform, and the shading component is arranged on the third platform; a screw drive component is used to drive the first platform, the second platform and the third platform to move along the first slide rail, the second slide rail and the third slide rail respectively.

[0009] Furthermore, the device also includes: a mounting block and a brake block, the mounting block is arranged on the mobile platform, and the brake block is arranged on the mounting block through a threaded connection.

[0010] Furthermore, the device also includes a handle, which is arranged at one end of the brake block for a user to hold.

[0011] Furthermore, the temperature control component includes: a box body, which is arranged on the shading component and is used to cover the light-emitting element and the photosensitive element to be detected; a conveying pipeline, which is arranged in the box body and is disc-mounted on the outer surface of the shading component; a plurality of mounting holes, which are opened on the box body and connected to the conveying pipeline; a conveying pump, which is connected to the conveying pipeline and is used to convey the heat transfer medium into the conveying pipeline.

[0012] Furthermore, the box body comprises: a main box body and a cover plate, and the cover plate is detachably mounted on the main box body by means of buckles.

[0013] The beneficial effects of the utility model are as follows: in the utility model, the moving component can drive the shading component to perform linear translational motion along the X-axis, Y-axis and Z-axis in three-dimensional space, so as to drive the light-emitting element and the photosensitive component to change their relative positions with the grating disk, obtain the measured rotation amount of the photosensitive component within different installation distances, and obtain the measurement error at different installation distances; by comparing the measurement error with the design tolerance, the installation tolerance range between the light-emitting element, the photosensitive element and the grating disk can be obtained, thereby ensuring the measurement accuracy of the high-speed grating encoder used in high-speed environmental measurement work in the later stage, and ensuring the production quality of the high-speed grating encoder. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A three-dimensional diagram of the overall structure of the testing device provided in an embodiment of the present application.

[0015] Figure 2 for Figure 1 A partial enlarged schematic diagram of part A.

[0016] Figure 3 This is a front view of the overall structure of the testing device provided in an embodiment of the present application.

[0017] Among them, 1. test motor; 2. reference encoder; 3. shading component; 41. first slide rail; 42. second slide rail; 43. third slide rail; 51. first platform; 52. second platform; 53. third platform; 54. mounting block; 55. brake block; 56. handle; 61. main box; 62. cover plate; 63. mounting hole; 71. drive motor; 72. lead screw. DETAILED DESCRIPTION

[0018] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0019] Reference Figure 1 and 3 As shown, an embodiment of the present application discloses a high-speed grating performance testing device, comprising: a test motor 1, the output shaft of the test motor 1 is equipped with a grating disk to be tested; a reference encoder 2, installed on the test motor 1, for measuring the actual rotation amount of the test motor 1; a shading component 3, for carrying the light-emitting element and the photosensitive element to be detected; a moving component, for carrying a shading cloth component, capable of driving the shading component 3 to perform linear translational motion along the X-axis, Y-axis and Z-axis in three-dimensional space; a temperature control component, for wrapping the shading component 3 and changing the temperature inside the shading component 3; a test host, electrically connected to the reference encoder 2 and the photosensitive element.

[0020] During the specific test, the rotating shaft with the grating disk is first installed on the output shaft of the test motor 1 through a coupling, and then the moving component is started to drive the shading component 3 close to the grating disk to be tested; then the light-emitting element and photosensitive element to be tested are installed on the shading component 3 through screws and are located on both sides of the grating disk. Finally, the test motor 1 is started to rotate, and the test host collects and obtains the test data.

[0021] It is worth mentioning that during the test, the moving component is started intermittently, and the moving component drives the shading component 3 to perform linear translational motion along the X-axis, Y-axis and Z-axis in the three-dimensional space (it can be axial movement along the grating disk or radial movement along the grating disk), thereby driving the light-emitting element and the photosensitive component to change their relative positions with the grating disk, and obtaining the measured rotation amount of the photosensitive component within different installation distances.

[0022] Among them, the test host can obtain the actual rotation amount of the output shaft of the test motor 1 through the reference encoder 2, and the test host can also obtain the measured rotation amount through the photosensitive element. By comparing the actual rotation amount with the test rotation amount, the measurement error of the photosensitive element to be tested can be obtained.

[0023] It can be understood that by comparing the measured rotation of the photosensitive component obtained at different installation distances with the actual rotation obtained by the reference encoder 2, the measurement error at different installation distances can be obtained; by comparing the measured error with the design tolerance, the installation tolerance range between the light-emitting element, the photosensitive element and the grating disk can be obtained, thereby ensuring the measurement accuracy of the high-speed grating encoder used in high-speed environmental measurement work in the future and ensuring the production quality of the high-speed grating encoder.

[0024] Specifically, the moving component includes: a slide rail, including a first slide rail 41, a second slide rail 42 and a third slide rail 43, which are respectively installed along the X-axis, the Y-axis and the Z-axis; a moving platform, including a first platform 51, a second platform 52 and a third platform 53, which are respectively slidably installed on the first slide rail 41, the second slide rail 42 and the third slide rail 43; wherein the second platform 52 is fixedly arranged on the first platform 51, the third platform 53 is fixedly arranged on the second platform 52, and the shading component 3 is arranged on the third platform 53; a screw drive component, which is used to drive the first platform 51, the second platform 52 and the third platform 53 to move along the first slide rail 41, the second slide rail 42 and the third slide rail 43, respectively, to flexibly change the relative position between the light-emitting element and the photosensitive component and the grating disk, and increase the test range.

[0025] Reference Figure 2 As shown, taking the first platform 51 as an example, the screw drive assembly includes: a drive motor 71 and a screw 72, the screw 72 is installed parallel to the first slide rail 41, the screw 72 and the first platform 51 are connected in transmission, and the drive motor 71 drives the screw 72 to rotate to drive the first platform 51 to slide along the first slide rail 41, thereby driving the first platform 51 to move along the X-axis; similarly, the drive installation method of the second platform 52 and the third platform 53 can be obtained, which will not be repeated here.

[0026] Preferably, a dovetail groove is provided on the mobile platform, and the slide rail is arranged in the dovetail groove; the device also includes: a mounting block 54 and a brake block 55, the mounting block 54 is provided on the mobile platform, and the brake block 55 is provided on the mounting block 54 through a threaded connection. When the mobile platform moves to the specified position, the user can twist the brake block 55 to change the distance that the brake block 55 protrudes from the mounting block 54 until the mobile platform is pressed against the slide rail to prevent the mobile platform from sliding during the test and causing measurement deviation.

[0027] Furthermore, the device also includes a handle 56, which is arranged at one end of the brake block 55 for a user to hold.

[0028] Furthermore, the temperature control component includes: a box body, which is arranged on the shading component 3 and is used to cover the light-emitting element and the photosensitive element to be detected; a conveying pipeline, which is arranged in the box body and is disc-mounted on the outer surface of the shading component 3; a plurality of mounting holes 63, which are opened on the box body and connected to the conveying pipeline; a conveying pump, which is connected to the conveying pipeline and is used to convey the heat transfer medium into the conveying pipeline.

[0029] By delivering heat transfer media of different temperatures into the delivery pipeline through a delivery pump, the temperature inside the box can be flexibly changed, thereby changing the ambient temperature of the light-emitting element, grating disk and photosensitive element, simulating the real high-temperature and high-speed working environment in the engine / reducer, so as to obtain more refined test data and improve the reliability of the test data.

[0030] It is worth mentioning that the heat transfer medium can be either water or air.

[0031] Furthermore, the box body includes: a main box body 61 and a cover plate 62, and the cover plate 62 is detachably mounted on the main box body 61 by means of buckles, so as to facilitate the user to disassemble and assemble the photosensitive element and the light-emitting element to be detected.

[0032] It should be understood by those skilled in the art that, although preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they are aware of the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention. Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the equivalent technology of the claims of the present invention, the present invention is also intended to include these modifications and variations.

Claims

1. A high-speed grating performance test device, characterized in that: include: A test motor (1), wherein the output shaft of the test motor (1) is equipped with a grating disk to be tested; A reference encoder (2) is mounted on the test motor (1) and is used to measure the actual rotation amount of the test motor (1); A light shielding component (3) used for carrying the light emitting element and the photosensitive element to be detected; A mobile component, used for carrying the shading cloth component, capable of driving the shading component (3) to perform linear translational motion along an X-axis, a Y-axis and a Z-axis in a three-dimensional space; A temperature control component, used for wrapping the shading component (3) and changing the temperature inside the shading component (3); The test host is electrically connected to the reference encoder (2) and the photosensitive element.

2. The high-speed grating performance testing device according to claim 1, characterized in that: The mobile components include: The slide rails include a first slide rail (41), a second slide rail (42) and a third slide rail (43), which are installed along the X axis, the Y axis and the Z axis respectively; The mobile platform comprises a first platform (51), a second platform (52) and a third platform (53), which are slidably mounted on the first slide rail (41), the second slide rail (42) and the third slide rail (43), respectively; wherein the second platform (52) is fixedly arranged on the first platform (51), the third platform (53) is fixedly arranged on the second platform (52), and the light shielding component (3) is arranged on the third platform (53); The lead screw drive assembly is used to drive the first platform (51), the second platform (52) and the third platform (53) to move along the first slide rail (41), the second slide rail (42) and the third slide rail (43) respectively.

3. The high-speed grating performance testing device according to claim 2, characterized in that: Also includes: The mounting block (54) and the brake block (55) are provided. The mounting block (54) is provided on the mobile platform, and the brake block (55) is provided on the mounting block (54) through a threaded connection.

4. The high-speed grating performance testing device according to claim 2, characterized in that: It also includes a handle (56) which is arranged at one end of the brake block (55) for a user to hold.

5. The high-speed grating performance testing device according to claim 1, characterized in that: Temperature control components include: A box body, arranged on the light shielding component (3), used for covering the light emitting element and the photosensitive element to be detected; The delivery pipeline is arranged in the box body and is mounted in a disc-like manner on the outer surface of the light-shielding component (3); A plurality of mounting holes (63) are formed on the box body and connected to the delivery pipeline; The delivery pump is connected to the delivery pipeline and is used to deliver the heat transfer medium into the delivery pipeline.

6. The high-speed grating performance testing device according to claim 5, characterized in that: The box includes: A main box body (61) and a cover plate (62), wherein the cover plate (62) is detachably mounted on the main box body (61) by means of buckles.

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