A small satellite high frequency cable length measurement tool

Abstract

In order to solve the problem of insufficient length measurement means in the existing high-frequency cable storage acceptance process, the utility model provides a high-frequency cable length measuring tool, comprising: a base and a dial; the base comprises a square bottom and a round table, and the round table is arranged above the square bottom; the dial is marked with scales around the circumferential direction, and the dial and the round table of the base have the same diameter; a pin is installed at the center of the dial, and the bottom of the pin is installed at the center of the round table of the base, and the dial rotates on the round table through the pin.

Description

Technical Field

[0001] The utility model relates to a small satellite high-frequency cable length measuring tool, belonging to the field of measurement. Background Art

[0002] Small satellites use high-frequency cables to connect related stand-alone devices to transmit high-frequency signals for satellite-to-ground communications. The quality of high-frequency cables plays a vital role in the success or failure of satellites. After the stand-alone manufacturer completes the production of high-frequency cables, they are delivered to the overall unit for cable acceptance, and length measurement is one of the key acceptance indicators. Since the positions of each stand-alone device in the entire satellite layout are different, the length of each high-frequency cable is also different. High-frequency cables are semi-rigid cables with hard materials. It is strictly forbidden to straighten them directly in a spiral. When unfolding, they must be unfolded in the opposite direction of the winding. There are strict requirements for the number of bends of high-frequency cables, generally not more than 5 times. Each cable is in a coiled state when it is delivered. When measuring with a ruler, the cable must be unfolded and laid flat on the inspection table. The existing inspection table is only 2.5m long, and it is very easy for the cable to be damaged during the length measurement process. Therefore, it is necessary to design a tool for measuring the length to complete the length measurement while keeping the high-frequency cable in a coiled state. Utility Model Content

[0003] The technical problem to be solved by the utility model is: in order to solve the problem of insufficient length measurement means in the existing high-frequency cable storage acceptance process, the utility model provides a tooling for measuring the length of high-frequency cables of small satellites with strong versatility and flexible use.

[0004] The technical solution adopted by the utility model is: a high-frequency cable length measuring tool, comprising: a base and a dial;

[0005] The base comprises a square bottom and a round platform, wherein the round platform is arranged above the square bottom;

[0006] The scale plate is marked with scales around the circumference, and the scale plate and the truncated cone of the base have the same diameter; a pin is installed at the center of the scale plate, and the bottom of the pin is installed at the center of the truncated cone of the base, and the scale plate rotates on the truncated cone through the pin.

[0007] Furthermore, the circumference of the frustum of the base is 1 m.

[0008] Furthermore, the base is made of anti-static foam.

[0009] Furthermore, the scale plate is made of anti-static foam with a thickness of 5 mm.

[0010] Furthermore, the pins are blunt-tip metal pins and are all located in antistatic foam.

[0011] Furthermore, the high-frequency cable length measuring tool can add a spacer between the frustum and the dial to expand the measuring range.

[0012] Furthermore, the circumferential outer wall of the truncated table is coated with antistatic plastic.

[0013] Furthermore, a hole is provided on the circumferential outer wall of the truncated cone at a position corresponding to the 0 scale, and the length of the hole is 15 mm, the width is 10 mm, and the depth is 55 mm.

[0014] Furthermore, an antistatic plastic layer is provided between the truncated table of the base and the scale plate.

[0015] Furthermore, the base adopts a color different from the outer sheath of the high-frequency cable.

[0016] The advantages of the utility model compared with the prior art are:

[0017] (1) The length measuring tool of the utility model can measure the length of the cable without unfolding the cable, thereby preventing the cable from being damaged during the unfolding and coiling process, minimizing the number of cable bends, ensuring product quality and reducing the operating risks of inspectors.

[0018] (2) The utility model can be used in the acceptance stage of high-frequency cables entering storage to measure the length of the cables without opening the original cable coils.

[0019] (3) The values ​​marked on the length measuring tool of the utility model are all marked after length verification with actual cables of the same diameter. When measuring long cables, the error is small and the values ​​are accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is the tooling diagram for measuring the length of high-frequency cables;

[0021] Figure 2 This is a schematic diagram of the high-frequency cable length measurement tool;

[0022] Figure 3 This is a schematic diagram of the use of a common high-frequency cable length measurement tool;

[0023] Figure 4 Schematic diagram for measuring right-angle bend high-frequency cable. DETAILED DESCRIPTION

[0024] The utility model is described in conjunction with the accompanying drawings.

[0025] like Figure 1 , Figure 2As shown, the high-frequency cable length measuring tool mainly includes two parts: a base 1 and a dial 2. The base 1 with a circle at the bottom is placed on the inspection table, the dial 2 with the length information marked on the circumference is concentric with the frustum 3 of the base 1 and has the same diameter, the pin 4 passes through the center of the circle of the dial 2 and is connected to the base 1, and the dial 2 can rotate on the frustum 3.

[0026] like Figure 3 As shown, after taking the high-frequency cable out of the packaging box, it is coiled and placed on the outer wall of the cone 3 of the base 1. By taking advantage of the high-frequency cable's relatively hard and elastic characteristics, the two ends of the cable can be slightly pulled to make it close to the outer wall of the cone 3. The dial 2 is rotated so that its 0 position is flush with one end of the cable. The number of complete turns of the cable is counted (the circumference of the cone 3 is 1m), and then the number is added to the reading on the dial (2) at the other end of the cable to obtain the actual measured length of the cable.

[0027] To ensure the safety of high-frequency cable transportation, the cables are all coiled in the packaging box with a circumference greater than 1m. The base 1 uses an anti-static foam combination with a bottom and an upper circle, and the dial 2 uses a 5mm thick white anti-static foam to prevent static electricity from damaging the cable during the measurement process. The pin 4 is a blunt metal pin and is completely located in the foam to prevent damage to the cable and personnel during the measurement. The initial height of the frustum 3 of the base 1 is 20mm, which can measure cables with a length of less than 4m. If longer cables are encountered, a pad can be added between the frustum and the dial to expand the range. The outer wall of the frustum 3 of the base 1 is covered with a layer of anti-static plastic, and the surface is smooth to reduce friction with the high-frequency cable.

[0028] like Figure 4 As shown, the outer circumferential wall of the truncated table 3 at position 0 is provided with a hole 5 of 15 mm in length, 10 mm in width and 55 mm in depth, which is used to measure high-frequency cables with right-angle elbows. The right-angle elbow part is directly inserted into the hole, which can measure the elbow length and prevent the elbow from being damaged during the cable adjustment process. It can also be used to fix the head of an ordinary straight high-frequency cable at position 0. A layer of anti-static plastic is placed between the truncated table of the base 1 and the dial 2 to reduce the friction when the dial 2 is rotated.

[0029] The circumference of the dial of the length measuring tool is 1m, and the number of winding circles is the whole meter value, which is easy to calculate.

[0030] The exposed parts of the length measuring tool are all made of soft materials without edges and corners, and there is no risk of damage to cables and personnel.

[0031] The tooling has a small appearance, light weight, and is easy to operate. A plurality of measuring toolings of the utility model can be arranged on one inspection table to enable multiple people to work simultaneously, thereby improving the efficiency of cable acceptance.

[0032] The base 1 and the dial 2 are made of antistatic foam. The base 1 is 40 mm thick and has a certain strength. The base 1 is made of pink foam, which forms a clear contrast with the color of the cable sheath (generally blue, green and black) and is easy to observe.

[0033] The size of the right-angle elbow is generally 55mm long (including the protective cap 5mm), and the deep hole 5 is processed on the outer wall of the base cone, such as Figure 1 As shown, it provides an interface for measuring right-angle elbow cables, such as Figure 4 The outer circumference of the truncated cone of the base 1 is covered with anti-static plastic to reduce the friction between the high-frequency cable and the truncated cone and reduce the friction resistance when the dial is rotated.

[0034] After the high-frequency cable measuring tool 7 is assembled, it is placed flat on the inspection table 6 with the 0 position of the platform facing forward. After taking the high-frequency cable 8 out of the product packaging box, it is directly placed on the round table 3 of the tool in a coiled state. The two ends of the high-frequency cable are properly tightened so that they are all close to the outer wall of the round table. The dial 2 is rotated so that its 0 position is aligned with one end of the high-frequency cable. The number of full turns of the cable winding is recorded as a, and the value b on the dial at the other end is read and recorded. The length of the high-frequency cable L = 1000a + b (mm) is added. After the measurement is completed, the cable can be easily removed by releasing the tight state for subsequent inspection items.

[0035] When measuring a cable with a right-angle elbow, insert the right-angle elbow into the hole near position 0 before properly tightening the cable. When you feel the protective cap on the cable head completely touches the bottom of the hole, it indicates that the elbow size is 50mm. Follow the ordinary cable measurement method to complete the cable length measurement.

[0036] The parts of the present invention that are not described in detail belong to the well-known technologies for those skilled in the art.

Claims

1. A high-frequency cable length measuring tool, characterized in that: include: A base (1) and a dial (2); The base (1) comprises a square bottom and a round platform (3), wherein the round platform (3) is arranged above the square bottom; The dial (2) is marked with scales in a circumferential direction, and the dial (2) and the truncated cone (3) of the base (1) have the same diameter; a pin (4) is installed at the center of the dial (2), and the bottom of the pin (4) is installed at the center of the truncated cone (3) of the base (1), and the dial (2) rotates on the truncated cone (3) through the pin (4).

2. A high-frequency cable length measuring tool according to claim 1, characterized in that: The circumference of the truncated cone (3) of the base (1) is 1 m.

3. A high-frequency cable length measuring tool according to claim 1, characterized in that: The base (1) is made of anti-static foam.

4. A high-frequency cable length measuring tool according to claim 1, characterized in that: The scale plate (2) is made of antistatic foam with a thickness of 5 mm.

5. A high-frequency cable length measuring tool according to claim 1, characterized in that: The pins (4) are blunt-headed metal pins and are all located in the antistatic foam.

6. A high-frequency cable length measuring tool according to claim 1, characterized in that: The high-frequency cable length measuring tool can add a spacer between the round table (3) and the scale plate (2) to expand the measuring range.

7. A high-frequency cable length measuring tool according to claim 1, characterized in that: The circumferential outer wall of the truncated table (3) is coated with antistatic plastic.

8. The high-frequency cable length measuring tool according to claim 1, characterized in that: A hole (5) is arranged on the circumferential outer wall of the truncated cone (3) at a position corresponding to the 0 scale mark, and the hole (5) has a length of 15 mm, a width of 10 mm and a depth of 55 mm.

9. A high-frequency cable length measuring tool according to claim 1, characterized in that: An antistatic plastic cloth layer is provided between the truncated cone of the base (1) and the scale plate (2).

10. The high-frequency cable length measuring tool according to claim 1, characterized in that: The base (1) adopts a color different from the outer sheath of the high-frequency cable.

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