Aircraft cable bending radius measuring tool

Abstract

According to the aircraft cable bending radius measuring tool, a handheld grip is arranged at the top of a body frame, a capacitive grating displacement sensor and an electronic processing unit are arranged in the body frame, a liquid crystal display screen and operation buttons which are used for being connected with the electronic processing unit are arranged in the middle of the body frame, and a connecting plate is arranged on the lower portion of the body frame. An angle sensor connected with the electronic processing unit is installed in the connecting plate and connected with one end of a left measuring arm and one end of a right measuring arm, and the other end of the left measuring arm and the other end of the right measuring arm can move back and forth towards the left end and the right end. The end, connected with the capacitive displacement sensor, of the middle measuring arm is embedded in the body frame, the other end of the middle measuring arm can stretch out and draw back in the axis direction of the middle measuring arm, and the capacitive displacement sensor is connected with the electronic processing unit. And the tail ends of the left measuring arm, the middle measuring arm and the right measuring arm are respectively provided with a contact probe. The method is simple to operate, high in applicability and high in measurement precision.

Description

Technical Field

[0001] This invention relates to the field of aircraft cable assembly technology, and in particular to a tool for measuring the bending radius of aircraft cables. Background Technology

[0002] The quality of aircraft cable laying and installation is crucial to flight safety, and the cable bending radius is an important parameter for inspecting the quality of cable laying and installation. According to design specifications, the bending radius of aircraft cables after laying and installation should not be less than 2 to 3 times the cable diameter. Currently, aircraft cable laying and installation often uses visual inspection or radius gauge measurement. Visual inspection relies entirely on the subjective experience of inspectors, which cannot meet the high precision and high quality requirements of the aviation industry. On the other hand, radius gauge measurement is cumbersome, inefficient, difficult to quantify accurately, and not applicable to measuring all cable bending conditions. Summary of the Invention

[0003] The technical problem solved by this invention is to provide a tool for measuring the bending radius of aircraft cables, so as to solve the problems in the background art mentioned above.

[0004] The technical problem solved by this invention is achieved by the following technical solution: A tool for measuring the bending radius of aircraft cables includes a handheld handle, operation buttons, an LCD screen, a connecting plate, a left measuring arm, a middle measuring arm, an angle sensor, a main frame, and a right measuring arm. The handheld handle is located at the top of the main frame, which houses a capacitive displacement sensor and an electronic processing unit. The LCD screen and operation buttons, connected to the electronic processing unit, are located in the middle of the main frame. The operation buttons include power on / off, brightness adjustment, unit switching, data hold, and function conversion. The connecting plate, located at the bottom of the main frame, houses an angle sensor connected to the electronic processing unit. The angle sensor is connected to one end of the left and right measuring arms, allowing the other ends of the left and right measuring arms to reciprocate to the left and right. The middle measuring arm, connected to the capacitive displacement sensor, is embedded in the main frame at one end, and its other end can extend and retract along its axis. The capacitive displacement sensor is connected to the electronic processing unit. Contact probes are located at the tail ends of the left, middle, and right measuring arms to ensure smooth sliding on the cable and prevent cable damage.

[0005] In this invention, the main frame and the hand grip are an integrated structure.

[0006] In this invention, a Type C interface is provided on one side of the main frame to enable data transmission.

[0007] In this invention, a battery compartment for installing lithium batteries is provided within the main frame.

[0008] In this invention, the intermediate measuring arm is a telescopic arm.

[0009] In this invention, the coordinates of any three points on the cable are collected by the left measuring arm, the middle measuring arm and the right measuring arm, and the bending radius of the cable is calculated by using the principle that three points determine a circle.

[0010] Beneficial effects: This invention uses three probes to contact the cable harness contour (highest point, lowest point, and measuring point) and apply a slight and consistent contact force to directly obtain the cable bending radius. The digital display result is intuitive and requires no table lookup or calculation. It is simple to operate, highly applicable, and has high measurement accuracy, effectively avoiding measurement errors caused by operator mistakes. At the same time, the middle measuring arm is a telescopic arm with an unfolded size of no more than 300mm, which is suitable for operation in the confined spaces of most aircraft, effectively filling the industry gap where traditional calipers cannot directly measure the bending radius of aircraft cables. Attached Figure Description

[0011] Figure 1 This is a front view of a preferred embodiment of the present invention.

[0012] Figure 2 This is a side view of a preferred embodiment of the present invention.

[0013] Figure 3 This is a top view of a preferred embodiment of the present invention.

[0014] Figure 4 This is a schematic diagram of the left measuring arm, middle measuring arm, and right measuring arm before and after measurement in a preferred embodiment of the present invention. Detailed Implementation

[0015] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below with reference to specific illustrations.

[0016] See Figures 1-3The illustrated aircraft cable bending radius measuring tool includes a handheld handle 1, operation buttons 2, an LCD screen 3, a connecting plate 4, a left measuring arm 5, a middle measuring arm 6, a contact probe 7, an angle sensor 8, a flathead screw 9, a main frame 10, a Type-C interface 11, a battery compartment 12, and a right measuring arm 13. The handheld handle 1 is located at the top of the main frame 10. A capacitive displacement sensor and an electronic processing unit are housed within the main frame 10. The LCD screen 3, connected to the electronic processing unit, is located in the middle of the main frame 10. Operation buttons are located above and below the LCD screen 3 on the main frame 10, and these buttons are for power on / off, brightness adjustment, unit switching, data hold, and function conversion. The connecting plate 4 is located at the bottom of the main frame 10, and a flathead screw is used to connect the connecting plate 4. An angle sensor 8 is installed on the left measuring arm 5 and one end of the right measuring arm 13. The other end of the left measuring arm 5 and the right measuring arm 13 can move back and forth to the left and right. The middle measuring arm 6 is embedded in the main frame at one end connected to the capacitive displacement sensor. The other end of the middle measuring arm 6 can extend and retract along its axis. The capacitive displacement sensor is connected to the electronic processing unit. At the same time, contact probes 7 are respectively set at the tail ends of the left measuring arm 5, the middle measuring arm 6, and the right measuring arm 13 to ensure smooth sliding on the cable and avoid scratching the cable.

[0017] In this embodiment, the main frame 10 and the hand grip 1 are an integral structure.

[0018] In this embodiment, a Type C interface 11 is provided on one side of the main body frame 10 to realize data transmission.

[0019] In this embodiment, a battery compartment 12 for installing lithium batteries is provided inside the main body frame 10, and the lithium batteries can be charged through the Type C interface 11.

[0020] In this embodiment, the intermediate measuring arm 6 is a telescopic arm.

[0021] In this embodiment, the principle of determining a circle by three points is adopted. The coordinates of any three points on the cable are collected by the left measuring arm 5, the middle measuring arm 6, and the right measuring arm 13, and then the bending radius of the cable is calculated. Figure 4 As shown, the measurement method is as follows: Point A (left side point): fixed length by left measuring arm 5 And angle sensor 8 to determine position ; Point B (right side point): fixed length by right measuring arm 13 And angle sensor 8 to determine position ; Point C (midpoint): The original length of the middle measuring arm 6 minus the extension / retraction amount. ( The original length of the intermediate measuring arm 6; The displacement of the intermediate measuring arm 6 is determined, and the angle remains unchanged due to structural constraints. Taking the original position of the middle measuring arm 6 as the origin, the coordinates of point C after measurement can be calculated as follows: The coordinates of point A are The coordinates of point B are ; Let the coordinates of point A be... The coordinates of point B are The coordinates of point C are Therefore, we get:

[0022] Calculate the distance between the three points:

[0023] Calculate the area of ​​a triangle :

[0024] Calculate the radius of a circle :

[0025] This allows us to obtain the bending radius of the cable.

[0026] The specific embodiments described herein are merely illustrative examples of the present invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or adopt similar methods to replace them, but without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

Claims

1. A tool for measuring the bending radius of aircraft cables, comprising a handheld handle, an operation button, an LCD display, a connecting plate, a left measuring arm, a middle measuring arm, an angle sensor, a main frame, and a right measuring arm, characterized in that, A handgrip is located at the top of the main frame. A capacitive displacement sensor and an electronic processing unit are housed within the main frame. An LCD screen and operation buttons for connection to the electronic processing unit are located in the middle of the main frame. A connecting plate is located at the bottom of the main frame, housing an angle sensor connected to the electronic processing unit. The angle sensor is connected to one end of the left and right measuring arms, allowing the other ends of the left and right measuring arms to reciprocate to the left and right. The middle measuring arm, with one end connected to the capacitive displacement sensor embedded within the main frame, has the other end capable of extending and retracting along its axis. The capacitive displacement sensor is connected to the electronic processing unit. Contact probes are located at the tail ends of the left, middle, and right measuring arms.

2. The aircraft cable bending radius measuring tool according to claim 1, characterized in that, The main frame and the hand grip are integrated into one structure.

3. The aircraft cable bending radius measuring tool according to claim 1, characterized in that, A Type-C interface is provided on one side of the main frame.

4. The aircraft cable bending radius measuring tool according to claim 1, characterized in that, The main frame contains a battery compartment for installing lithium batteries.

5. The aircraft cable bending radius measuring tool according to claim 1, characterized in that, The middle measuring arm is a telescopic arm.

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