A device and method for measuring the center distance between the two ear holes in space

Abstract

The present invention discloses a device for measuring the center distance between the two ear holes in space. The device includes a multi-dimensional adjustment platform, a rotary support arranged on the multi-dimensional adjustment platform, and two connecting rods connected to the rotary support. A rotary encoder is provided at the connection of the two connecting rods, and laser displacement sensors are provided at the other ends of the two connecting rods. The laser emitted by the laser displacement sensor hits a target ball on the two ear holes whose center distance is to be measured. Both the laser displacement sensor and the rotary encoder are signal-connected to a data acquisition and processing module, and the data acquisition and processing module is signal-connected to a human-computer interaction module. This device solves the problems of limited measurement space and low accuracy of contact measurement at present, and can achieve rapid distance measurement. In addition to being applicable to the measurement of the spatial distance between two ear holes, there are also various application scenarios. The part to be measured can be positioned at the spatial point by installing a target ball, and then this device can be used for measurement. Therefore, it has good application prospects.

Description

Technical Field

[0001] The present invention relates to the field of non-contact measurement, and particularly to a device and method for measuring the center distance between two ear holes in space. Background Art

[0002] With the invention of lasers, lasers play an important role on the stage of the human world. Lasers, with their good coherence, high brightness, and good directivity, are widely used in the field of measurement, especially in the field of non-contact measurement, where information about the object to be measured can be obtained without contacting the surface of the object to be measured. Compared with contact measurement, non-contact measurement has a wider range of application scenarios, higher integration, and faster measurement speed.

[0003] Since the measurement of the spatial distance between two ear holes belongs to in-machine measurement and the measurement space in the ear hole area is limited, it is not convenient for large instruments such as coordinate measuring machines to work. Therefore, it is more difficult to install an actuator between the two ear holes. Usually, it is necessary to repeatedly install and disassemble to adjust the length of the actuator so that it can be reliably installed on the two ear holes, which causes great inconvenience to the assembly operation and reduces the work efficiency. Summary of the Invention

[0004] In view of the above situation, the present invention provides a non-contact laser-based measurement method, which can solve problems such as limited measurement space and low accuracy of contact measurement in the prior art, and achieve the rapid measurement of the spatial distance between the wing surface and the zero-position two ear holes. At the same time, this device can be applied to the measurement of various spatial distances.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A device for measuring the center distance between two ear holes in space, the device includes a multi-dimensional adjustment platform, a rotary support arranged on the multi-dimensional adjustment platform, and two connecting rods connected to the rotary support. A rotary encoder is provided at the connection of the two connecting rods, and laser displacement sensors are provided at the other ends of the two connecting rods. The laser emitted by the laser displacement sensor hits a target ball on the two ear holes whose center distance is to be measured. Both the laser displacement sensor and the rotary encoder are signal-connected to a data acquisition and processing module, and the data acquisition and processing module is signal-connected to a human-computer interaction module.

[0007] Further, the target ball is fixed on a target seat of the two ear holes.

[0008] Further, the multi-dimensional adjustment platform includes a one-dimensional coarse and fine adjustment rotary table. A guide rail is provided on the one-dimensional coarse and fine adjustment rotary table, and a slider is provided on the guide rail. The upper end of the slider is fixedly connected to a one-dimensional fine adjustment translation table, and the upper end of the one-dimensional fine adjustment translation table is fixedly connected to the rotary support.

[0009] Further, the rotary support includes a bearing seat and a rotating shaft connecting two connecting rod brackets. The two connecting rod brackets are respectively connected to the connecting rods, and a rotary encoder is provided on the rotating shaft.

[0010] Further, hydraulic telescopic rods are provided on both of the two connecting rods, and the other ends of the hydraulic telescopic rods are respectively connected to a one-dimensional fine-tuning translation stage.

[0011] Further, the multi-dimensional adjustment platform is fixed on a triangular bracket.

[0012] A method for measuring the center distance between two ear holes in space specifically includes the following steps:

[0013] Step 1: Install the measuring device and adjust the height of the triangular bracket so that the distance between the laser displacement sensor and the target ball is within the range of the laser displacement sensor.

[0014] Step 2: Coarsely adjust the one-dimensional fine-tuning translation stage fixedly connected thereto through the guide rail and the slider moving on the guide rail to adjust the position of the laser displacement sensor so that the laser hits near the center of the target ball of the calibration piece.

[0015] Step 3: Lock the length of the hydraulic telescopic rod and finely adjust the one-dimensional fine-tuning translation stage and the one-dimensional coarse and fine-tuning rotary stage so that the laser accurately hits the center of the target ball of the calibration piece.

[0016] Step 4: The data acquisition and processing module acquires and processes the output signals of the laser displacement sensor and the rotary encoder to obtain the distances between the two laser displacement sensors and the target ball of the calibration piece and their angular values.

[0017] Step 5: Repeat steps 4 to 6 twice to respectively measure the data between the other two target balls of the calibration pieces.

[0018] Step 6: According to the measured values of the three target balls of the calibration pieces and the standard values of the target balls of the calibration pieces, calculate the accurate lengths of the two measuring arms.

[0019] Step 7: Repeat steps 4 to 6, replace the target ball of the calibration piece in the steps with the space double ear holes, and calculate the distance value of the space double ear holes through software according to the cosine theorem of the triangle combined with the target ball radius compensation.

[0020] Step 8: The human-computer interaction module displays the final measurement result.

[0021] Beneficial effects:

[0022] The device and method for measuring the center distance between the two ear holes in space provided by the present invention, through the above technical solution, solve the problems of limited measurement space and low contact measurement accuracy in the prior art, and can achieve rapid distance measurement. In addition to being applicable to the measurement of the space distance between the two ear holes, there are also various application scenarios. As long as the part to be measured can locate the position of the space point by installing a target ball, this device can be used for measurement. Therefore, it has good application prospects. Brief Description of the Drawings

[0023] Figure 1 is a schematic structural diagram of the present invention.

[0024] In the figure: 1 - two ear holes; 2 - target ball; 3 - laser; 4 - laser displacement sensor; 5 - multi-dimensional adjustment platform; 51 - one-dimensional coarse and fine adjustment rotary table; 52 - guide rail; 53 - slider; 54 - one-dimensional fine adjustment translation table; 6 - connecting rod; 7 - hydraulic telescopic rod; 8 - rotary encoder; 9 - rotary support; 91 - bearing seat; 92 - connecting rod support; 93 - rotating shaft; 10 - data acquisition and processing module; 11 - human-computer interaction module; 12 - triangular support. Detailed Embodiment

[0025] The present invention will be further described below in conjunction with the drawings and embodiments.

[0026] As Figure 1 shown, the device for measuring the center distance between the two ear holes in space provided by the present invention, the device includes a multi-dimensional adjustment platform 5, a rotary support 9 arranged on the multi-dimensional adjustment platform 5, and two connecting rods 6 connected to the rotary support 9. A rotary encoder 8 is provided at the connection of the two connecting rods 6, and laser displacement sensors 4 are provided at the other ends of the two connecting rods 6.

[0027] The laser 3 emitted by the laser displacement sensor 4 hits the target ball 2 on the two ear holes 1 whose center distance is to be measured, generating a laser spot at the center of the target ball 2. The two ear holes 1 have two ear pieces, and the target ball 2 is installed on the target seat of the two ear holes 1. The position of the center of the target ball 2 is used to represent the position of the two ear holes 1. The laser displacement sensor 4 is used to measure the distance between the laser displacement sensor 4 and the surface of the target ball 2.

[0028] The multi-dimensional adjustment platform 5 is fixed on the triangular bracket 12. The multi-dimensional adjustment platform 5 includes a one-dimensional coarse and fine adjustment rotary table 51. A guide rail 52 is provided on the one-dimensional coarse and fine adjustment rotary table 51. A slider 53 is provided on the guide rail 52. The upper end of the slider 53 is fixedly connected to a one-dimensional fine adjustment translation table 54. The upper end of the one-dimensional fine adjustment translation table 54 is fixedly connected to a rotary support 9. The one-dimensional fine adjustment translation table 54 can coarsely and finely adjust the spatial position of the measuring device in the X-axis direction through the guide rail 52 and the slider 53. The one-dimensional coarse and fine adjustment rotary table 51 is fixed on the triangular bracket 12 to support the measuring device to maintain its stability and can coarsely and finely adjust the spatial position of the measuring device in the Z-axis direction through the lifting of the triangular bracket 12.

[0029] The rotary support 9 includes a bearing seat 91 and a rotating shaft 93 connecting two connecting rod brackets 92. The two connecting rod brackets 92 are respectively connected to the connecting rod 6. A rotary encoder 8 is provided on the rotating shaft 93. Hydraulic telescopic rods 7 are provided on both of the two connecting rods 6. The other ends of the hydraulic telescopic rods 7 are both connected to the one-dimensional fine adjustment translation table 54, which can assist in supporting the connecting rod 6 and adjusting the angular position of the connecting rod 6. The center of the connecting rod 6 is on the same straight line as the measuring laser 3 and is connected to the connecting rod bracket 92 and the hydraulic telescopic rod 7 for adjusting the spatial positions of the two laser displacement sensors 4 and connecting their data lines to the data acquisition and processing module 10 after leading them out through the inside of the connecting rod 6.

[0030] Both the laser displacement sensor 4 and the rotary encoder 8 are signal-connected to the data acquisition and processing module 10. The data acquisition and processing module 10 is signal-connected to the human-computer interaction module 11. The data acquisition and processing module 10 collects and processes the output signals of the laser displacement sensor 4 and the rotary encoder 8, calculates the measurement result according to the cosine theorem relationship, and performs radius compensation on the measurement result for the target ball 2 to obtain the spatial distance between the wing surface and the zero-position double ear hole 1.

[0031] The human-computer interaction module 11 is used for human-computer interaction, controlling the entire measuring device to perform measurement work and display and output the measurement result.

[0032] A method for measuring the center distance of spatial double ear holes has the following steps:

[0033] Step 1: Install the measuring device and adjust the height of the triangular bracket 12 so that the distance between the laser displacement sensor 4 and the calibration target ball 2 is within the range of the laser displacement sensor 4.

[0034] Step 2: Coarsely adjust the one-dimensional fine adjustment translation table 54 fixedly connected thereto through the guide rail 52 and the slider 53 moving on the guide rail 52 to adjust the position of the laser displacement sensor 4 so that the laser 3 hits near the center of the calibration target ball 2.

[0035] Step 3: Lock the length of the hydraulic telescopic rod 7, and finely adjust the one-dimensional fine-tuning translation stage 54 and the one-dimensional coarse-fine-tuning rotary stage 51 to accurately hit the center of the calibration target ball 2 with the laser 3;

[0036] Step 4: The data acquisition and processing module 10 acquires and processes the output signals of the laser displacement sensor 4 and the rotary encoder 8 to obtain the distances between the two laser displacement sensors 4 and the calibration target ball 2 and their angular values;

[0037] Step 5: Repeat steps 4 to 6 twice to respectively measure the data between the other two calibration target balls 2;

[0038] Step 6: Calculate the accurate lengths of the two measuring arms according to the measured values of the calibration target balls 2 in three times and the standard values of the calibration target balls 2;

[0039] Step 7: Repeat steps 4 to 6, replace the calibration target ball 2 in the steps with the spatial double ear hole 1, and calculate the distance value of the spatial double ear hole 1 through software by combining the cosine theorem of a triangle with the radius compensation of the target ball 2;

[0040] Step 8: The human-computer interaction module 11 displays the final measurement result.

[0041] Regarding the limitations on the protection scope of the present invention, those skilled in the art should understand that based on the technical solutions of the present invention, various modifications or deformations that can be made by those skilled in the art without creative efforts are still within the protection scope of the present invention.

Claims

1. A device for measuring the center distance between the two ear holes in space, characterized in that, the device includes a multi-dimensional adjustment platform (5), a rotary support (9) arranged on the multi-dimensional adjustment platform (5), and two connecting rods (6) connected to the rotary support (9). A rotary encoder (8) is provided at the connection of the two connecting rods (6), and laser displacement sensors (4) are provided at the other ends of the two connecting rods (6). The laser (3) emitted by the laser displacement sensor (4) hits the target ball (2) on the two ear holes (1) with the center distance to be measured. The laser displacement sensors (4) and the rotary encoder (8) are both connected to the data acquisition and processing module (10) in a signal manner. The data acquisition and processing module (10) is connected to the human-computer interaction module (11) in a signal manner. The multi-dimensional adjustment platform (5) includes a one-dimensional coarse and fine adjustment rotary table (51). A guide rail (52) is provided on the one-dimensional coarse and fine adjustment rotary table (51). A slider (53) is provided on the guide rail (52). The upper end of the slider (53) is fixedly connected to a one-dimensional fine adjustment translation table (54). The upper end of the one-dimensional fine adjustment translation table (54) is fixedly connected to the rotary support (9). The target ball (2) is fixed on the target seat of the two ear holes (1). The rotary support (9) includes a bearing seat (91) and a rotating shaft (93) connecting two connecting rod brackets (92). The two connecting rod brackets (92) are respectively connected to the connecting rods (6). The rotary encoder (8) is provided on the rotating shaft (93). Hydraulic telescopic rods (7) are provided on the two connecting rods (6). The other ends of the hydraulic telescopic rods (7) are both connected to the one-dimensional fine adjustment translation table (54).

2. The device for measuring the center distance between the two ear holes in space according to claim 1, characterized in that, the multi-dimensional adjustment platform (5) is fixed on a triangular bracket (12).

3. A method for measuring the center distance between the two ear holes in space using the device according to claim 1, characterized in that, it has the following steps: Step 1: Install the measuring device, adjust the height of the triangular bracket (12) so that the distance between the laser displacement sensor (4) and the target ball (2) of the calibration piece is within the range of the laser displacement sensor (4); Step 2: Coarsely adjust the one-dimensional fine adjustment translation table (54) fixedly connected thereto through the guide rail (52) and the slider (53) moving on the guide rail (52) to adjust the position of the laser displacement sensor (4) so that the laser (3) hits near the center of the target ball (2) of the calibration piece; Step 3: Lock the length of the hydraulic telescopic rod (7), finely adjust the one-dimensional fine adjustment translation table (54) and the one-dimensional coarse and fine adjustment rotary table (51) so that the laser (3) accurately hits the center of the target ball (2) of the calibration piece; Step 4: The data acquisition and processing module (10) acquires and processes the output signals of the laser displacement sensors (4) and the rotary encoder (8) to obtain the distances between the two laser displacement sensors (4) and the target ball (2) of the calibration piece and their angular values; Step 5: Repeat steps 4 to 6 twice to respectively measure the data between the other two target balls (2) of the calibration pieces; Step 6: Calculate the accurate lengths of the two measuring arms based on the measured values of the calibration target ball (2) and the standard values of the calibration target ball (2). Step 7: Repeat Steps 4 to 6, replace the calibration target ball (2) in the steps with the spatial double ear hole (1), and calculate the distance value of the spatial double ear hole (1) through software according to the cosine theorem of a triangle in combination with the radius compensation of the target ball (2). Step 8: The human-computer interaction module (11) displays the final measurement result.

Images