A measuring target for precision detection of a ship

Abstract

The utility model provides a kind of measuring target for ship precision detection, including target handle and target pole, the target handle and the target pole detachably connect, at least four target points are spaced apart from top to bottom and are provided on the target handle, target tip is provided on the end of the target pole away from the target handle, the target tip and the target heart of at least four the target points are located on the same straight line.The measuring target for ship precision detection of the utility model, more detection points on target, not easy to block, convenient to use;Simple structure, easy to make;Convenient maintenance, easy-wear parts can be adjusted, replaced, and the cost of production and use is low.

Description

Technical Field

[0001] This utility model belongs to the field of shipbuilding technology, and specifically relates to a measuring target for ship precision testing. Background Technology

[0002] Concealed targets are used to measure the accuracy of concealed points on ships. However, after prolonged use, these targets wear out significantly, the target paper becomes blurry, the target tip becomes thicker due to wear, the pointing becomes less precise, and the magnetic support is damaged. The aging and wear of the equipment make it far less convenient and flexible to use than before. Concealed targets are also expensive. Therefore, how to reduce the cost of using concealed targets is an urgent problem to be solved. Utility Model Content

[0003] To address the aforementioned problems, this utility model provides a measuring target for ship precision testing. The target has numerous testing points, is not easily obstructed, and is convenient to use; it has a simple structure, is easy to manufacture, is easy to maintain, and its vulnerable parts can be adjusted and replaced, resulting in low manufacturing and operating costs.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A measuring target for ship accuracy testing includes a target handle and a target rod, the target handle and the target rod being detachably connected. At least four target points are spaced apart from top to bottom on the target handle, and a target tip is provided at the end of the target rod away from the target handle. The target tip and the center of the target points are located on the same straight line.

[0006] Furthermore, a locking buckle extending axially away from the target handle is connected to one end of the target handle near the target rod. The locking buckle has a hollow structure, and the upper end of the target rod extends into the locking buckle and is detachably connected to the locking buckle.

[0007] Furthermore, multiple sets of circularly distributed threaded holes are provided on the side wall of the locking buckle from top to bottom, and bolts are screwed into the threaded holes, with the bolts abutting against the side wall of the target rod.

[0008] Furthermore, a groove is provided at the position opposite to the threaded hole to accommodate the end of the bolt.

[0009] Furthermore, the depth of the groove is not less than 0.5 mm.

[0010] Furthermore, the number of threaded holes is two sets. The distance between the central axis of the threaded hole located near the target handle and the upper end face of the locking buckle is 1 / 4 of the length of the locking buckle. The distance between the central axis of the threaded hole located near the target rod and the lower end face of the locking buckle is 1 / 4 of the length of the locking buckle.

[0011] Furthermore, a first annular scale line is provided on the lower side wall of the target rod, and the vertical distance between the first annular scale line and the target tip is 50mm.

[0012] Furthermore, a second annular scale line is provided on the upper side wall of the target rod, and the vertical distance between the second annular scale line and the lower end face of the locking buckle is 10mm.

[0013] Furthermore, a reflective sheet is fixed on the side of the target handle, and the target point is located on the reflective sheet.

[0014] This utility model provides a measuring target for ship precision testing. It features angle adjustment, easy adjustment and repair of wear, high precision, reusability, and long service life. Its main advantages include portability, simple structure, ease of manufacture, convenient use, the ability to replace vulnerable parts for multiple uses, and low cost. Its widespread use can save costs and improve work efficiency for companies. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the measuring target for ship accuracy testing described in this utility model.

[0016] Figure 2 This is a schematic diagram showing the connection between the locking buckle and the target rod described in this utility model.

[0017] Among them, 1-target handle, 2-target rod, 3-locking buckle, 4-bolt, 101-target point, 201-target tip, 202-first annular scale line, 203-second annular scale line. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0019] like Figures 1-2 As shown, a measuring target for ship precision testing includes a target handle 1 and a target rod 2, which are detachably connected. At least four target points 101 are spaced apart from top to bottom on the target handle 1. A reflective sheet is fixed on the side of the target handle 1, and the target points 101 are located on the reflective sheet. A target tip 201 is provided at the end of the target rod 2 away from the target handle 1, and the target tip 201 and the target center of the at least four target points 101 are located on the same straight line.

[0020] To facilitate the setting of multiple target points 101 and ensure that each target point 101 is clearly visible, in this embodiment, the overall design length of the measuring target is 371mm and the width is 42mm. The target handle 1 is relatively long, corresponding to a larger number of detection points (bullseye). In field use, as long as any two bullseyes are visible, the invisible detection points can be measured, thus making it less likely to be obstructed and more convenient to use.

[0021] More importantly, the target handle 1 and the target rod 2 are separable. The target rod 2 is the most easily damaged part during use. If the target rod 2 is severely damaged, it can be replaced directly. The other parts can be used normally. If there is slight wear, the length of the target rod 2 can be adjusted to continue using it. This can extend the service life as much as possible and reduce the cost of use.

[0022] In this embodiment, a locking buckle 3 is connected to one end of the target handle 1 near the target rod 2, extending axially away from the target handle 1. The locking buckle 3 has a hollow structure, and the upper end of the target rod 2 extends into the locking buckle 3 and is detachably connected to the locking buckle 3. Multiple sets of circularly distributed threaded holes are provided on the side wall of the locking buckle 3 from top to bottom, and bolts 4 are screwed into the threaded holes. The bolts 4 abut against the side wall of the target rod 2.

[0023] More specifically, the target rod 2 and the target handle 1 are connected by four bolts 4 in the top and bottom directions, for a total of eight bolts 4. These eight bolts 4 can adjust the concentricity of the target tip 201 and the target center. If the target rod 2 is slightly bent, it can still be used as long as the target tip 201 and the target center are aligned. There are no strict requirements for the straightness of the target rod 2, and the material requirements are not very high. As a result, the target rod 2 is easy to find and there are many replacement products. In addition, if the target rod 2 is bent slightly by human intervention, these bolts 4 can be adjusted to achieve the required concentricity, and it can still be used.

[0024] Understandably, of these eight bolts, the upper bolt 4 primarily serves for fine-tuning and fixing, while the lower bolt 4 allows for a slightly larger adjustment range, but also provides a fixing function once adjusted. No similar product features such a convenient design.

[0025] Furthermore, a groove is provided at the position opposite to the threaded hole to accommodate the end of the bolt 4; the depth of the groove is not less than 0.5 mm. This arrangement ensures the contact area and contact roughness between the bolt 4 and the target rod 2.

[0026] Furthermore, the distance between the central axis of the threaded hole located near the target handle 1 and the upper end face of the locking buckle 3 is 1 / 4 of the length of the locking buckle 3, and the distance between the central axis of the threaded hole located near the target rod 2 and the lower end face of the locking buckle 3 is 1 / 4 of the length of the locking buckle 3.

[0027] Furthermore, a first annular scale line 202 is provided on the lower side wall of the target rod 2, and the vertical distance between the first annular scale line 202 and the target tip 201 is 50mm. A second annular scale line 203 is provided on the upper side wall of the target rod 2, and the vertical distance between the second annular scale line 203 and the lower end face of the locking buckle 3 is 10mm. The depth of the first annular scale line 202 and the second annular scale line 203 is about 0.2mm, and the width is about 0.2mm.

[0028] Understandably, the second annular scale line 203 is used to detect the length change from the target tip 201 to the scale line, while the first annular scale line 202 is used to detect the length change caused by the loosening of the target handle 1 and the target rod 2. These two length changes directly affect the accuracy of the target, facilitating timely verification and adjustment.

[0029] When manufacturing the measuring target described in this utility model, five crosshair lines are engraved on the center of the front of the target handle 1 (the side with the reflector attached), with each line spaced 50mm apart. All the crosshairs are on a straight line. This is to facilitate the replacement of worn target paper on the target surface.

[0030] The target handle 1 and the locking buckle 3 are to be welded together. When welding, the center of the target handle 1 should be aligned with the center of the locking buckle 3 with a 0.3mm margin. This 0.3mm margin is to ensure that the target center after the target paper is attached is on the same line as the center of the locking buckle 3 (the thickness of general target paper is about 0.3mm). The more precise the connection is, the easier the subsequent adjustment will be.

[0031] During welding, welding should be done alternately on both sides to minimize welding deformation. Adjustments can also be made to correct deformation before the target cools down. The target rod 2 is approximately 125mm long and 6mm in diameter, with the target tip 201 on the rod 2 being approximately 10mm long. During use, the target body is fixed by the target rod 2 and the magnetic support. The target body must not wobble during use, and the aiming at the bullseye should be as precise as possible when using a total station.

[0032] After completion, the above data errors are first verified using a high-precision machined ruler and vernier calipers and adjusted to within the acceptable range. Then, a total station is used for verification, and the coordinate data of the two target centers and target tip 201 are measured in permutation and combination. Each group needs to be measured more than 3 times. Then, the average error value of the accuracy data is taken, and then fine-tuned in combination with the test data until the error is controlled within 1mm before it can be used. The eight bolts 4 that fix the target rod 2 need to be adjusted multiple times to achieve the concentricity requirement between the target center and target tip 201.

[0033] Those skilled in the art should understand that the above description is merely a specific embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A measuring target for ship accuracy inspection, characterized in that, It includes a target handle and a target rod, which are detachably connected. At least four target points are provided on the target handle from top to bottom, and a target tip is provided at the end of the target rod away from the target handle. The target tip and the center of the target of the at least four target points are located on the same straight line.

2. The measuring target for ship accuracy testing according to claim 1, characterized in that, A locking buckle extending axially away from the target handle is connected to one end of the target handle near the target rod. The locking buckle has a hollow structure, and the upper end of the target rod extends into the locking buckle and is detachably connected to the locking buckle.

3. The measuring target for ship accuracy testing according to claim 2, characterized in that, Multiple sets of circularly distributed threaded holes are provided on the side wall of the locking buckle from top to bottom, and bolts are screwed into the threaded holes, with the bolts abutting against the side wall of the target rod.

4. The measuring target for ship accuracy testing according to claim 3, characterized in that, A groove is provided at the position opposite to the threaded hole to accommodate the end of the bolt.

5. The measuring target for ship accuracy inspection according to claim 4, characterized in that, The depth of the groove is not less than 0.5 mm.

6. The measuring target for ship accuracy testing according to any one of claims 3 to 4, characterized in that, The number of threaded holes is two sets. The distance between the central axis of the threaded hole located near the target handle and the upper end face of the locking buckle is 1 / 4 of the length of the locking buckle. The distance between the central axis of the threaded hole located near the target rod and the lower end face of the locking buckle is 1 / 4 of the length of the locking buckle.

7. The measuring target for ship accuracy testing according to claim 6, characterized in that, A first annular scale line is provided on the lower side wall of the target rod, and the vertical distance between the first annular scale line and the target tip is 50mm.

8. The measuring target for ship accuracy inspection according to claim 7, characterized in that, A second annular scale line is provided on the upper side wall of the target rod, and the vertical distance between the second annular scale line and the lower end face of the locking buckle is 10mm.

9. The measuring target for ship accuracy testing according to claim 1, characterized in that, A reflective sheet is fixed on the side of the target handle, and the target point is located on the reflective sheet.

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