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CN-122015678-A - Device and method for measuring center distance of thrust rod

CN122015678ACN 122015678 ACN122015678 ACN 122015678ACN-122015678-A

Abstract

The invention relates to a device and a method for measuring the center distance of a thrust rod, and belongs to the field of vehicle component detection. The technical scheme includes that the distance measuring device for the center distance of the thrust rod comprises a box body, a main body platform is arranged in the box body, a jig is arranged on the main body platform, a camera adjusting module is arranged on one side of the jig, two industrial cameras are mounted on the camera adjusting module, a telecentric lens is mounted on the industrial cameras, a light source adjusting module is arranged on the other side of the jig, two parallel light sources are mounted on the light source adjusting module, and the distance measuring device further comprises a control terminal which is electrically connected with the industrial cameras and used for receiving images shot by the industrial cameras and processing and analyzing the images. The control terminal automatically processes the image data, greatly improves the detection efficiency, reduces human errors, ensures the consistency and the accuracy of measurement results, and solves the problems of low efficiency and high cost of the traditional three-coordinate detection.

Inventors

  • QI BIN
  • WANG LICHUANG
  • HOU JINGSEN
  • CHEN MINGZHE
  • GUO HAICHAO

Assignees

  • 中国重汽集团济南汽车部件有限公司

Dates

Publication Date
20260512
Application Date
20260106

Claims (10)

  1. 1. The utility model provides a distance between centers measuring equipment of distance between thrust rod, includes box (1), be equipped with main part platform (2) in box (1), its characterized in that, be equipped with tool (10) on main part platform (2), one side of tool (10) is equipped with camera adjustment module (8), install two industry cameras (4) on camera adjustment module (8), install telecentric lens (5) on industry camera (4), the opposite side of tool (10) is equipped with light source adjustment module (7), install two parallel light sources (6) on light source adjustment module (7), two industry camera (4) and two parallel light sources (6) are just right one by one, and are used for shooting the both ends of thrust rod respectively, still include control terminal (12), control terminal (12) are connected with industry camera (4) electricity for receive the image that industry camera took carries out the processing analysis.
  2. 2. The distance between centers of the thrusting rods measuring apparatus according to claim 1, wherein the light source adjusting module (7) comprises a fixed base (701) and a third slide rail (702), the fixed base (701) and the third slide rail (702) are both mounted on the main body platform (2), and the sliding direction of the third slide rail (702) is parallel to the direction of the thrusting rod in the jig (10), one of the parallel light sources (6) is fixedly mounted on the fixed base (701), and the other parallel light source (6) is movably mounted on the third slide rail (702).
  3. 3. The distance measuring apparatus as claimed in claim 2, wherein the camera adjusting module (8) is identical in structure to the light source adjusting module (7), and one of the industrial cameras (4) is mounted on a fixed base (701) of the camera adjusting module (8) and the other industrial camera (4) is movably mounted on a third slide rail (702) of the camera adjusting module (8) on the camera adjusting module (8).
  4. 4. The distance measuring device for the center distance of the thrust rod according to claim 1, wherein the main body platform (2) is provided with an upper discharging station (14) and a detection station (15), the detection station (15) is located between the parallel light source (6) and the industrial camera (4), the upper discharging station (14) is located at one side of the detection station (15), the upper discharging station (14) and the detection station (15) are jointly provided with a first sliding rail (3) and a transposition driving mechanism (9), and the jig (10) is slidably installed on the first sliding rail (3) and is connected with a moving end of the transposition driving mechanism (9).
  5. 5. The distance measuring device for the center distance of the thrust rod according to claim 4, wherein an in-place sensor (11) is arranged at one end of the first sliding rail (3) corresponding to the detection station.
  6. 6. The distance measuring device for the center distance of the thrust rod according to claim 2, wherein the jig (10) comprises a bottom plate (101) and a top plate (108), a jacking mechanism (103) is arranged between the top plate (108) and the bottom plate (101), a sliding groove (102) is formed in the bottom surface of the bottom plate (101), the sliding groove (102) is in sliding connection with the first sliding rail (3), and a material clamping mechanism (105) is arranged on the top surface of the top plate (108).
  7. 7. The device for measuring the center distance of the thrust rod according to claim 6, wherein the top surface of the bottom plate (101) and the bottom surface of the top plate (108) are respectively provided with a second sliding rail (106), the jacking mechanism (103) comprises four supporting rods (107), the four supporting rods (107) are hinged in a crossed mode, the lower end of one supporting rod (107) hinged with each other is hinged with the bottom plate (101), the upper end of the other supporting rod is connected with the second sliding rail (106) positioned on the top plate (108) in a sliding mode, the lower end of the other supporting rod is hinged with the second sliding rail (106) positioned on the bottom plate (101) and connected with a linear motor (104), the other end of the other supporting rod is connected with the top plate (108) in a hinged mode, four corners of the bottom plate (101) are respectively provided with a stabilizing block (1010), telescopic rods (109) are mounted on the stabilizing blocks (1010), and the upper ends of the four telescopic rods (109) are respectively connected with four corners of the top plate (108).
  8. 8. The distance between centers of the thrust rods measuring device according to claim 6, wherein a fourth slide rail (1051) is installed on the top surface of the top plate (108), the fourth slide rail (1051) is perpendicular to the first slide rail (3), the material clamping mechanism (105) is slidably installed on the fourth slide rail (1051), and the material clamping mechanism comprises four clamping blocks (1052), and the four clamping blocks (1052) are arranged opposite to each other in pairs and are respectively used for clamping two ends of the thrust rods.
  9. 9. The method for measuring the center distance of the thrust rod is characterized by comprising the following steps of: S1, placing a thrust rod workpiece on a jig (10) of an upper and lower material working station (14), and moving the jig (10) to a detection working station (15) by a transposition driving mechanism (9); S2, after the in-place sensor (11) detects that the jig (10) is in place, the parallel light source (6) is turned on, and the industrial camera shoots the upper part of the spherical pin of the thrust rod; S3, the control terminal (12) performs size judgment; s4, the transposition driving mechanism (9) drives the jig (10) to move back to the loading and unloading station (14), the thrust rod tool is taken down, and then the steps S1-S3 are repeated.
  10. 10. The distance measuring method according to claim 9, wherein step S3 includes: S31, after an in-place sensor detects that a jig is in place, a parallel light source is started, an industrial camera shoots the upper part of a spherical pin assembly, an obtained upper projection image is a contour projection of the spherical pin assembly under the irradiation of the parallel light source, then straight line fitting is carried out on contour side lines on the projection image, the contour side lines are lines formed on the projection image by the contour edge of the spherical pin assembly, and are basic basis for subsequent calculation; S32, selecting four appointed side lines, calculating a central line through two of the side lines, and calculating the distance between the other side line and the central line; S33, selecting four appointed side lines on a projection diagram of the spherical pin assembly, wherein the four side lines respectively correspond to edge contour lines of different directions of the spherical pin assembly, two side lines are a group of opposite side lines, the other two side lines are another group of side lines of different directions, a central line is calculated through the group of opposite side lines, the central line is a symmetrical datum line of the spherical pin assembly and is used for positioning a datum position, then the vertical distance between one side line in the other group of side lines and the central line is calculated, the vertical distance reflects the offset degree of the side line relative to the symmetrical datum, the rest side line in the other group of side lines is shifted outwards by an appointed hole position distance H, the appointed hole position distance H is a preset standard distance of a spherical pin mounting hole of a thrust rod, a new side line is formed after shifting, the intersection point of the new side line and the corresponding side line is a datum measuring point, four datum measuring points P1, P2, P3 and P4 are sequentially constructed according to the same method, and correspond to the center corresponding positions of upper and lower mounting holes of the spherical pin assembly respectively and are used as core reference points for calculating the center distances; S34, calculating angle deviation values corresponding to four reference measurement points according to the vertical distance between the side line and the central line, the designated hole site distance H and the preset standard size parameter of the thrust rod, which are obtained in the step S33, wherein the preset standard size parameter comprises the standard width and the preset reference length of the spherical pin assembly, and the angle deviation values reflect the angle deviation degree of the actual reference point relative to the standard position and correct the position deviation; S35, calculating straight line distances between the reference measuring points P1 and P2 and between the reference measuring points P3 and P4 respectively, wherein the actual distances respectively correspond to the upper mounting holes and the lower mounting holes of the spherical pin assembly, the actual distances are direct measurement data, and after two distance values are obtained, calculating an average value of the two values, wherein the average value is the center distance dimension of the thrust rod, namely the final standard distance between the centers of the spherical pin mounting holes at the two ends of the thrust rod.

Description

Device and method for measuring center distance of thrust rod Technical Field The invention relates to the field of vehicle component detection, in particular to a device and a method for measuring the center distance of a thrust rod. Background The thrust rod is a core component of a suspension system of the heavy commercial vehicle, the running stability and the safety of the vehicle are directly affected by the size of the center distance of the thrust rod, and different types of suspensions need to be matched with the thrust rod with a specific center distance, so that the center distance detection is a key quality control link in the production process of the thrust rod. Along with the improvement of the requirements of heavy commercial vehicle industry on the consistency of product quality, high-efficiency and accurate measurement means of the center distance of the thrust rod are required to support mass production. The high-precision detection of the center distance of the thrust rod in the current industry mainly depends on a three-coordinate measuring device, and the detection method of the equipment comprises the steps of contacting the inner wall of a spherical pin mounting hole of the thrust rod and a key profile surface point by point through a precision probe, collecting coordinate data of a large number of discrete points, fitting, modeling and calculating the data through special software, and finally deducing the center distance size. The scheme has the obvious technical defects that equipment purchase and maintenance cost is high, production cost of enterprises is greatly increased, detection flow is complex, single-piece detection needs to take a long time to collect data and operate, rapid detection requirements in a batch production scene cannot be met, operation needs to be controlled by professional technicians, equipment flexibility is insufficient, rapid response to detection requirements of thrust rods with different specifications is difficult, and production efficiency improvement is severely restricted. The problems of contradiction between high precision and high efficiency, unbalance between high cost and practicality of the existing three-coordinate detection scheme cannot meet the actual requirements of heavy commercial vehicle manufacturing industry on synchronous optimization of production efficiency and product quality. Disclosure of Invention The invention provides a device for measuring the center distance of a thrust rod, aiming at the problems of low efficiency and high cost existing in the existing three-coordinate detection method for detecting the center distance of the thrust rod. In order to solve the problems, the technical scheme includes that the device for measuring the center distance of the thrust rod comprises a box body, a main body platform is arranged in the box body, a jig is arranged on the main body platform, a camera adjusting module is arranged on one side of the jig, two industrial cameras are installed on the camera adjusting module, a telecentric lens is installed on the industrial cameras, a light source adjusting module is arranged on the other side of the jig, two parallel light sources are installed on the light source adjusting module, the two industrial cameras and the two parallel light sources are opposite to each other one by one and are respectively used for shooting two ends of the thrust rod, and the device further comprises a control terminal which is electrically connected with the industrial cameras and is used for receiving images shot by the industrial cameras and processing and analyzing the images. The control terminal automatically processes the image data without manual conversion, greatly improves the detection efficiency, reduces human errors, ensures the consistency and the accuracy of a measurement result, and solves the problems of low detection efficiency and high cost of the traditional three-coordinate detection. As an optimal implementation scheme of distance between centers of the thrust rods, the light source adjusting module comprises a fixed base and a third sliding rail, wherein the fixed base and the third sliding rail are both installed on the main body platform, the sliding direction of the third sliding rail is parallel to the direction of the thrust rods in the jig, one parallel light source is fixedly installed on the fixed base, and the other parallel light source is movably installed on the third sliding rail. The movable parallel light source adjusts the distance between the fixed light source and the third slide rail, so that the distance can be adapted to the thrust rods with different length specifications, the uniform irradiation of the light source to the spherical pin assemblies at the two ends of the thrust rods is ensured, the problem of imaging blurring caused by the size difference of workpieces is avoided, the stability and the definition of image acquisition are improved, and a high-qualit