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CN-122015675-A - Visual detection device for circumferential salient points of wire harness terminal and centering constraint method

CN122015675ACN 122015675 ACN122015675 ACN 122015675ACN-122015675-A

Abstract

The invention discloses a visual detection device for circumferential salient points of a wire harness terminal, wherein the end part of a detected wire harness is the wire harness terminal, the wire harness terminal comprises a terminal head and a terminal tail, the terminal tail is cylindrical and coaxial with the detected wire harness, a plurality of circumferential salient points are arranged on the periphery of the terminal head in a circumferential array, the visual detection device comprises an industrial camera, an annular light source is arranged in front of a lens of the industrial camera, a wire harness clamp is arranged in front of the annular light source, the wire harness clamp comprises a fixing clamp block and a lifting clamp block, a wire harness passing hole is formed between the fixing clamp block and the lifting clamp block, a terminal centering constraint unit is arranged between the wire harness clamp and the annular light source, and coaxiality of the wire harness terminal and the lens is improved.

Inventors

  • SUN XUN
  • XIE JINGWEI
  • FANG YUYANG
  • WANG JIN

Assignees

  • 德维嘉汽车电子系统(无锡)有限公司

Dates

Publication Date
20260512
Application Date
20260112

Claims (8)

  1. 1. The utility model provides a circumference bump vision detection device of pencil terminal, is pencil terminal (37) by the tip of measuring pencil (1), pencil terminal (37) include terminal head (3) and terminal tail (2), and terminal tail (2) are the cylinder with measuring pencil (1) coaxial, and the periphery of terminal head (3) is circumference array and is provided with a plurality of circumference bumps (33); The device is characterized by comprising an industrial camera (7), wherein an annular light source (5) is arranged in front of a lens (6) of the industrial camera (7), and a wire harness clamp (34) is arranged in front of the annular light source (5); The wire harness clamp (34) comprises a fixed clamping block (9) and a lifting clamping block (4), a wire harness passing hole (11) is formed between the fixed clamping block (9) and the lifting clamping block (4), and a terminal centering constraint unit is arranged between the wire harness clamp (34) and the annular light source (5).
  2. 2. The device for visually inspecting a circumferential protruding point of a wire harness terminal according to claim 1, wherein the terminal centering constraint unit comprises a first constraint line (16 a), a second constraint line (16 b) and a third constraint line (16 c), the first constraint line (16 a), the second constraint line (16 b) and the third constraint line (16 c) intersect with each other at an axial view along a lens (6), an equilateral triangle surrounding constraint opening (13) is formed in a position where the three intersect with each other, and an axial line of the lens (6) passes through a geometric center of the equilateral triangle surrounding constraint opening (13).
  3. 3. The visual inspection device for circumferential protruding points of a wire harness terminal according to claim 2, wherein in the inspection state, the outer peripheral surface of the terminal tail (2) is tangent to three inner sides of an equilateral triangle surrounding binding opening (13).
  4. 4. The visual inspection device for circumferential protruding points of a wire harness terminal according to claim 3, wherein the terminal centering constraint unit further comprises an equilateral triangle frame (12), and a first gravity wheel (15 a), a second gravity wheel (15 b) and a third gravity wheel (15 c) are respectively arranged at three vertex angles of the equilateral triangle frame (12).
  5. 5. The device for visually inspecting a circumferential bump of a wire harness terminal according to claim 4, wherein the first gravity wheel (15 a) comprises a first fixed shaft (19 a), a first inner ring (21 a) and a first outer ring (20 a), the first fixed shaft (19 a) is fixed at the vertex angle of the equilateral triangle frame (12), the first inner ring (21 a) is sleeved outside the first fixed shaft (19 a) through a bearing, the first outer ring (20 a) is coaxial with the first inner ring (21 a), the first outer ring (20 a) and the first inner ring (21 a) are integrally connected through a first fan-shaped counterweight (22 a), and the first fan-shaped counterweight (22 a) is arranged on the left side of the first outer ring (20 a); The second gravity rotating wheel (15 b) comprises a second fixed shaft (19 b), a second inner ring (21 b) and a second outer ring (20 b), wherein the second fixed shaft (19 b) is fixed at the vertex angle of the equilateral triangle frame (12), the second inner ring (21 b) is sleeved outside the second fixed shaft (19 b) through a bearing, the second outer ring (20 b) is coaxial with the second inner ring (21 b), and the second outer ring (20 b) and the second inner ring (21 b) are integrally connected through a second sector counterweight (22 b), and the second sector counterweight (22 b) is arranged at the left side of the second outer ring (20 b); the third force rotating wheel (15 c) comprises a third fixed shaft (19 c), a third inner ring (21 c) and a third outer ring (20 c), wherein the third fixed shaft (19 c) is fixed at the vertex angle of the equilateral triangle frame (12), the third inner ring (21 c) is sleeved outside the third fixed shaft (19 c) through a bearing, the third outer ring (20 c) is coaxial with the outside of the third inner ring (21 c), and the third outer ring (20 c) and the third inner ring (21 c) are integrally connected through a third sector counterweight (22 c), and the third sector counterweight (22 c) is arranged at the left side of the third outer ring (20 c); The first constraint line (16 a) is in a horizontal state when being stretched, the left end of the first constraint line (16 a) is fixedly connected with a first telescopic device (14 a) extending along the length direction, the right end of the first constraint line is fixedly connected with a first outer ring (20 a), and the extension line of the first constraint line (16 a) passes through the center of the first outer ring (20 a); The upper part of the second constraint line (16 b) is in a rightward inclined state when being tightened, the right upper end of the second constraint line (16 b) is fixedly connected with a second telescopic device (14 b) extending along the length direction, the left lower end of the second constraint line is fixedly connected with a second outer ring (20 b), and the extension line of the second constraint line (16 b) passes through the center of the second outer ring (20 b); the upper part of the third constraint line (16 c) is in a leftward inclined state when being tightened, the right lower end of the third constraint line (16 c) is fixedly connected with a third telescopic device (14 c) extending along the length direction, the left upper end of the third constraint line is fixedly connected with a third outer ring (20 c), and the extension line of the third constraint line (16 c) passes through the center of the third outer ring (20 c).
  6. 6. The visual inspection device for circumferential bumps of a wire harness terminal as set forth in claim 5, wherein: The device also comprises a first adjusting wheel (14 a), a second adjusting wheel (14 b) and a third adjusting wheel (14 c), wherein the first adjusting wheel (14 a), the second adjusting wheel (14 b) and the third adjusting wheel (14 c) are driven to rotate by respective driving motors (14); The outer contours of the first adjusting wheel (14 a), the second adjusting wheel (14 b) and the third adjusting wheel (14 c) are all a circle of constant-speed spiral contour surfaces (15); the constant velocity spiral profile surfaces (15) of the first (14 a), second (14 b) and third (14 c) adjusting wheels are tangential to the upper sides (31) of the first (22 a), second (22 b) and third (22 c) sector weights, respectively.
  7. 7. The method of operation of a visual inspection device for circumferential bumps of a wire harness terminal as set forth in claim 5, wherein: in the initial state, the wire harness passing opening (11) is in a relatively open state, and the first telescopic device (14 a), the second telescopic device (14 b) and the third telescopic device (14 c) respectively apply a pull-back force F to the first constraint line (16 a), the second constraint line (16 b) and the third constraint line (16 c) together; Step two, synchronously controlling the first telescopic device (14 a), the second telescopic device (14 b) and the third telescopic device (14 c) to extend outwards for a certain distance; Thirdly, a wire harness terminal (37) of the detected wire harness (1) passes through the wire harness passing opening (11) along the axial direction and continues to advance along the axial direction until a terminal tail (2) of the wire harness terminal (37) reaches the enclosing range of the equilateral triangle enclosing binding opening (13); Controlling the first telescopic device (14 a), the second telescopic device (14 b) and the third telescopic device (14 c) to do shrinkage action, and respectively applying a pull-back force F to the first constraint line (16 a), the second constraint line (16 b) and the third constraint line (16 c); And fifthly, the industrial camera (7) shoots an end image of the wire harness terminal (37) along the coaxial axis visual angle through the lens (6), and whether the data such as the outer diameter circle data, the outer contour fitting degree, the deviation degree, the coaxiality and the like of a circle of circumference Xiang Tudian (33) of the outer circumference of the terminal head (3) meet the conditions or not is analyzed through the vision system.
  8. 8. The method of operating a visual inspection device for circumferential bumps of a wire harness terminal as set forth in claim 6, wherein: in the initial state, the wire harness passing opening (11) is in a relatively open state, and the first telescopic device (14 a), the second telescopic device (14 b) and the third telescopic device (14 c) respectively apply a pull-back force F to the first constraint line (16 a), the second constraint line (16 b) and the third constraint line (16 c) together; At the moment, the first adjusting wheel (14 a), the second adjusting wheel (14 b) and the third adjusting wheel (14 c) are respectively controlled to rotate clockwise by the same angle, so that constant-speed spiral profile surfaces (15) on the peripheries of the first adjusting wheel (14 a), the second adjusting wheel (14 b) and the third adjusting wheel (14 c) respectively force the first gravity rotating wheel (15 a), the second gravity rotating wheel (15 b) and the third gravity rotating wheel (15 c) to rotate clockwise by a certain angle around the axis, the first telescopic device (14 a), the second telescopic device (14 b) and the third telescopic device (14 c) adaptively extend out for a certain length, and simultaneously, a pull-back force F is applied to the first constraint line (16 a), the second constraint line (16 b) and the third constraint line (16 c) together, and further, the inscribed circle of the equilateral triangle enclosing constraint opening (13) is enlarged to be just consistent with the outer diameter of the terminal tail (2) at the moment; Step two, synchronously controlling the first telescopic device (14 a), the second telescopic device (14 b) and the third telescopic device (14 c) to extend outwards for a certain distance; Thirdly, a wire harness terminal (37) of the detected wire harness (1) passes through the wire harness passing opening (11) along the axial direction and continues to advance along the axial direction until a terminal tail (2) of the wire harness terminal (37) reaches the enclosing range of the equilateral triangle enclosing binding opening (13); Controlling the first telescopic device (14 a), the second telescopic device (14 b) and the third telescopic device (14 c) to do shrinkage action, and respectively applying a pull-back force F to the first constraint line (16 a), the second constraint line (16 b) and the third constraint line (16 c); And fifthly, the industrial camera (7) shoots an end image of the wire harness terminal (37) along the coaxial axis visual angle through the lens (6), and whether the data such as the outer diameter circle data, the outer contour fitting degree, the deviation degree, the coaxiality and the like of a circle of circumference Xiang Tudian (33) of the outer circumference of the terminal head (3) meet the conditions or not is analyzed through the vision system.

Description

Visual detection device for circumferential salient points of wire harness terminal and centering constraint method Technical Field The invention belongs to the field of wire harness detection. Background As shown in fig. 1, the end part of a typical detected wire harness is a wire harness terminal 3, the wire harness terminal 37 comprises a terminal head 3 and a terminal tail 2, a plurality of circumferential protruding points 33 are arranged on the periphery of the terminal head 3 in a circumferential array, the plurality of circumferential protruding points 33 have the function that after the terminal head 3 is inserted into a corresponding jack, acting forces are generated between the plurality of circumferential protruding points 33 and elastic sheets in the jack, the effect of stable conduction and limiting is achieved, and the electrical performance stability of the wire harness terminal 37 in an inserted state is improved. However, the harness clamp 34 only ensures that the clamped part of the detection harness 1 is strictly coaxial with the axis of the lens 6, and the harness terminal 37 at the tail end of the detected harness 1 may not coincide with the axis of the lens 6 due to external reasons such as gravity, self-bending of the harness and the like, so that a slight coaxiality error exists, and thus, the detection error is caused. Disclosure of Invention The invention aims to overcome the defects in the prior art, and provides a visual detection device for circumferential salient points of a wire harness terminal and a centering constraint method, which improve the coaxiality of the wire harness terminal and a lens. The technical scheme is that in order to achieve the purpose, the visual detection device for the circumferential salient points of the wire harness terminal comprises a wire harness terminal, wherein the end part of a detected wire harness is the wire harness terminal, the wire harness terminal comprises a terminal head and a terminal tail, the terminal tail is in a cylindrical shape coaxial with a detected wire harness, a plurality of circumferential salient points are arranged on the periphery of the terminal head in a circumferential array mode, the visual detection device comprises an industrial camera, an annular light source is arranged in front of a lens of the industrial camera, a wire harness clamp is arranged in front of the annular light source, the wire harness clamp comprises a fixing clamp block and a lifting clamp block, a wire harness passing hole is formed between the fixing clamp block and the lifting clamp block, and a terminal centering constraint unit is arranged between the wire harness clamp and the annular light source. The terminal centering constraint unit comprises a first constraint line, a second constraint line and a third constraint line, the first constraint line, the second constraint line and the third constraint line are mutually intersected in the view angle along the axis of the lens, an equilateral triangle surrounding constraint opening is formed in the mutually intersected position of the first constraint line, the second constraint line and the third constraint line, and the axis of the lens passes through the geometric center of the equilateral triangle surrounding constraint opening. Further, in the detection state, the outer peripheral surface of the terminal tail is tangent to three inner side edges of the equilateral triangle enclosing constraint opening. Further, the terminal centering constraint unit further comprises an equilateral triangle frame, and a first gravity rotating wheel, a second gravity rotating wheel and a third gravity rotating wheel are respectively arranged at three vertex angles of the equilateral triangle frame. Further, the first gravity rotating wheel comprises a first fixed shaft, a first inner ring and a first outer ring, wherein the first fixed shaft is fixed at the vertex angle of the equilateral triangle frame, the first inner ring is sleeved outside the first fixed shaft through a bearing, the first outer ring is coaxial with the first inner ring, and the first outer ring and the first inner ring are integrally connected through a first sector counterweight; The second gravity rotating wheel comprises a second fixed shaft, a second inner ring and a second outer ring, wherein the second fixed shaft is fixed at the vertex angle of the equilateral triangle frame, the second inner ring is sleeved outside the second fixed shaft through a bearing, the second outer ring is coaxial with the second inner ring, and the second outer ring and the second inner ring are integrally connected through a second fan-shaped counterweight; the third force rotating wheel comprises a third fixed shaft, a third inner ring and a third outer ring, wherein the third fixed shaft is fixed at the vertex angle of the equilateral triangle frame, the third inner ring is sleeved outside the third fixed shaft through a bearing, the third ou