Cable bend radius automatic measuring instrument based on laser measurement

Abstract

The application discloses a kind of cable turning radius automatic measuring instrument based on laser measurement, comprising: measuring chassis, angle detection module, swing bar, mobile laser ranging probe, first fixed laser ranging probe, second fixed laser ranging probe and control module, by moving mobile laser ranging probe, three laser ranging probes are aligned simultaneously to be measured wire, to obtain measurement distance, the data measured by three laser ranging probes, the data measured by angle detection module can be calculated to obtain the radius of wire turning, simple operation, and use laser non-contact measurement scheme, avoid the potential risk of measurement personnel high-altitude live working.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wire turning radius measurement, and particularly relates to a cable turning radius automatic measuring instrument based on laser measurement. BACKGROUND

[0002] The power cable routing has corresponding design standards at the beginning of design. If the actual construction routing is not performed according to the design standards, for example, the cable is excessively bent, the cable strength is changed, the cable cannot reach the use strength, and even the heating condition is generated under the normal current operation. In the engineering acceptance, the cable turning radius measurement uses the conventional ruler measurement and the on-site calculation. This method requires that the measurement personnel have professional geometric knowledge, and the human measurement error is large, and the on-site calculation efficiency is low. More than that, the acceptance personnel often simplify the process and directly complete the acceptance by simple visual inspection.

[0003] There is no tool for conveniently using and quickly calculating the cable routing parameters, and it is difficult to judge whether the construction routing turning radius meets the standards. The above problems undoubtedly increase the difficulty of engineering acceptance and leave hidden dangers for line operation.

[0004] The traditional cable radius measurement method is Figure 5 As shown by the Pythagorean theorem: R*R=(R-A)*(R-A)+B*B; in the actual cable turning radius measurement, the traditional method only needs to measure the actual lengths of A and B to obtain the value of R through the first-order quadratic equation.

[0005] The traditional measurement method mainly has the following defects and deficiencies:

[0006] 1. Complex operation. In practice, when measuring the values of A and B, the length of 2B is first calculated, and then the length of A is measured. In the process of measuring A and B, it is necessary to ensure that A and B are perpendicular, and it is necessary to determine the center point to ensure that the center is on the A straight line.

[0007] 2. Time-consuming and laborious, and has a certain danger. In actual complex working conditions, due to the limitation of the terrain and the laying environment of the cable, some cables are laid in the air, and some cables are laid in the underground cable well, which makes the measurement very difficult. The measurement personnel need to climb to the high tower or go down to the well to measure, and most of the time, the measurement needs to be carried out under the voltage, which has a high danger coefficient.

[0008] 3. Low precision. In actual manual measurement, the length and the perpendicular angle are measured by using the tape measure and the protractor, and the manual operation and the environmental restriction will produce a large measurement error.

[0009] 4. Complex calculation. After the measurement is completed, complex first-order quadratic equation operation is still needed, which has a large amount of operation and a huge workload.

[0010] In view of this, there is a need for a laser measurement-based cable turn radius automatic measuring instrument. SUMMARY

[0011] The embodiment of the present application provides a laser measurement-based cable turn radius automatic measuring instrument to at least solve the technical problem of inconvenient measurement of conductor turn radius in the related art.

[0012] The present application provides a laser measurement-based cable turn radius automatic measuring instrument, comprising:

[0013] a measurement base plate;

[0014] an angle detection module arranged at the center of the measurement base plate;

[0015] a swing rod, one end of which is rotationally connected to the angle detection module, and the angle of rotation of the swing rod can be monitored through the angle detection module;

[0016] a mobile laser ranging probe arranged at the other end of the swing rod, the mobile laser ranging probe being connected with a third laser ranging sensor;

[0017] a first fixed laser ranging probe fixedly arranged on the measurement base plate, the first fixed laser ranging probe and the center of the measurement base plate forming a first straight line, the first straight line and the swing rod forming a first included angle, the first fixed laser ranging probe being connected with a first laser ranging sensor;

[0018] a second fixed laser ranging probe fixedly arranged on the measurement base plate and located between the first included angles, the second fixed laser ranging probe being connected with a second laser ranging sensor; and

[0019] a control module arranged on the measurement base plate and electrically connected with the angle detection module, the mobile laser ranging probe, the first fixed laser ranging probe and the second fixed laser ranging probe, for processing data transmitted by the angle detection module, the mobile laser ranging probe, the first fixed laser ranging probe and the second fixed laser ranging probe to obtain a conductor turn radius.

[0020] Optionally, the angle of the first included angle is at least 110°.

[0021] Optionally, the second fixed laser ranging probe and the first fixed laser ranging probe form a second straight line, the second straight line and the first straight line forming a second included angle, and the angle of the second included angle is between 20° and 30°.

[0022] Optionally, the length of the swing rod is less than the distance from the center of the measurement base plate to the edge.

[0023] Optionally, the measuring base disc is a disc.

[0024] Optionally, a plurality of keys are arranged on the measuring base disc, and the plurality of keys are electrically connected with the control module.

[0025] Optionally, the mobile laser ranging probe, the first fixed laser ranging probe and the second fixed laser ranging probe are located at the same level.

[0026] Optionally, a display screen is arranged on the measuring base disc, and the display screen is electrically connected with the control module.

[0027] Optionally, the second fixed laser ranging probe and the first fixed laser ranging probe form a second straight line, and the angle detection module is used for detecting the angle between the second straight line and the swing rod.

[0028] Optionally, a power supply is arranged on the measuring base disc, and the power supply is electrically connected with the control module.

[0029] Optionally, a handle is arranged on the back of the measuring base disc.

[0030] Compared with the prior art, the present application has the following beneficial effects:

[0031] 1. The cable turning radius automatic measuring instrument based on laser measurement comprises a measuring base disc, an angle detection module, a swing rod, a mobile laser ranging probe, a first fixed laser ranging probe, a second fixed laser ranging probe and a control module, the three laser ranging probes are aligned with the measured wire by moving the mobile laser ranging probe, the measurement distance is obtained, the control module calculates the wire turning radius by combining the measured data of the three laser ranging probes and the measured data of the angle detection module, the operation is simple, and the potential risk of high-altitude live work of the measurer is avoided by using the laser non-contact measurement scheme.

[0032] 2. High-precision laser ranging sensors and angle sensors are used, and the measurement accuracy is high (the accuracy of the laser ranging sensor is ±1mm, and the accuracy of the angle sensor is 0.36°).

[0033] 3. The control module is used for calculation and processing, so that the manual calculation work is avoided, and the measurement efficiency is improved.

[0034] 4. The measuring base disc is a disc, which can reduce the weight of the high-altitude load of the worker. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description only represent some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative effort based on these drawings.

[0036] Figure 1 is a front view of a laser measurement-based cable turn radius automatic measuring instrument according to an embodiment of the present application;

[0037] Figure 2 is an oblique view of a laser measurement-based cable turn radius automatic measuring instrument according to an embodiment of the present application;

[0038] Figure 3 is a rear view of a laser measurement-based cable turn radius automatic measuring instrument according to an embodiment of the present application;

[0039] Figure 4 is a circuit structure schematic diagram of a laser measurement-based cable turn radius automatic measuring instrument according to an embodiment of the present application;

[0040] Figure 5 is a traditional cable radius measurement schematic diagram;

[0041] Figure 6 is a measurement schematic diagram of a laser measurement-based cable turn radius automatic measuring instrument according to an embodiment of the present application;

[0042] In the drawings: 1, measurement chassis; 2, angle detection module; 3, swing rod; 4, movable laser ranging probe; 5, first fixed laser ranging probe; 6, second fixed laser ranging probe; 7, control module; 8, first button; 9, second button; 10, display screen; 11, power supply; 12, handle. DETAILED DESCRIPTION

[0043] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The technical solutions in the embodiments of the present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0044] In order to enable persons skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments only represent some embodiments of the present application, and not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort should belong to the scope of protection of the present application.

[0045] It should be noted that the terms "first", "second", and the like in the description and in the claims of the present application and the above-described accompanying drawings are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or apparatus including a series of steps or units does not have to be limited to only those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to the process, method, product, or apparatus.

[0046] Embodiment 1

[0047] According to an embodiment of the present application, an embodiment of a laser measurement-based cable turning radius automatic measuring instrument is provided, as shown in Figures 1-4 The measuring base 1, the angle detection module 2, the swing rod 3, the movable laser ranging probe 4, the first fixed laser ranging probe 5, the second fixed laser ranging probe 6, and the control module 7 are included.

[0048] The measuring base 1 is a disc, i.e., a measuring disc. In addition, the measuring base 1 can also be square, triangular, trapezoidal, etc., and the present application adopts a disc, which has a small volume relative to a square, etc., and is more convenient to place and carry in use, and can better protect the use safety of the user than an angular shape.

[0049] The angle detection module 2 is arranged at the center of the front of the measuring base 1. In the present embodiment, the angle detection module 2 adopts an angle sensor for detection, which is fixedly arranged at the center of the measuring base 1, and the angle detection module 2 is used to detect the angle between the second straight line and the swing rod 3.

[0050] One end of the swing rod 3 is rotationally connected with the angle detection module 2, and the angle detection module 2 can monitor the angle of rotation of the swing rod 3. In the present embodiment, the length of the swing rod 3 is less than the radius of the disc, and one end of the swing rod 3 is rotationally installed on the angle detection module 2.

[0051] The movable laser ranging probe 4 is arranged at the other end of the swing rod 3, and the movable laser ranging probe 4 is connected with the third laser ranging sensor. In the present embodiment, the movable laser ranging probe 4 is arranged below the other end of the swing rod 3, so that the movable laser ranging probe 4 is also located above the measuring base 1, and is located on a same horizontal plane as the first fixed laser ranging probe 5 and the second fixed laser ranging probe 6.

[0052] The first fixed laser ranging probe 5 is fixedly arranged on the front face of the measuring base 1, the first fixed laser ranging probe 5 and the center of the measuring base 1 form a first straight line, the first straight line and the swing rod 3 form a first included angle, and the first fixed laser ranging probe 5 is connected with the first laser ranging sensor. The angle of the first included angle is at least 110°, and the maximum is not more than 130°. In this embodiment, the angle of the first included angle is at least 120°, and the first fixed laser is arranged on the right side of the angle detection module 2. Of course, the fixed angle and the angle after movement can also be set according to the needs.

[0053] The second fixed laser ranging probe 6 is fixedly arranged on the front face of the measuring base 1 and located between the first included angles, and the second fixed laser ranging probe 6 is connected with the second laser ranging sensor. The second fixed laser ranging probe 6 and the first fixed laser ranging form a second straight line, the second straight line and the first straight line form a second included angle, and the angle of the second included angle is between 20° and 30°. In this embodiment, the second fixed laser ranging probe 6 is arranged on the right side of the angle sensor, and the second included angle is 30°.

[0054] The control module 7 is arranged on the measuring base 1, and the control module 7 is electrically connected with the angle detection module 2, the movable laser ranging probe 4, the first fixed laser ranging probe 5 and the second fixed laser ranging probe 6 respectively, and is used for processing the data transmitted by the angle detection module 2, the movable laser ranging probe 4, the first fixed laser ranging probe 5 and the second fixed laser ranging probe 6 to obtain the cable turning radius. In this embodiment, the control module 7 is arranged on the back face of the measuring base 1, and the control module 7 adopts STM32.

[0055] As an optional embodiment, the cable turning radius automatic measuring instrument based on laser measurement further comprises a plurality of keys arranged on the measuring base 1, and the plurality of keys are electrically connected with the control module 7 respectively. The function of each key can be set according to the needs.

[0056] Specifically, in this embodiment, the keys are arranged on the front face of the measuring base 1, including a first key 8 and a second key 9, the first key 8 and the second key 9 are electrically connected with the control module 7 respectively, the first key 8 is a measurement key, and the second key 9 is a data display switching key. Two buttons are used to assist the cable turning radius measurement.

[0057] As an optional embodiment, the cable bending radius automatic measuring instrument based on laser measurement further comprises a display screen 10 arranged on the front of the measuring base 1, the display screen 10 is electrically connected with the control module 7, and the first button 8 and the second button 9 are arranged on the two sides of the display screen 10 respectively. The display screen 10 is a liquid crystal display, for example, an OLED liquid crystal screen. The measured cable bending radius and the arc length data of the measured cable can be displayed on the display screen 10, and the display screen 10 can also be set according to the requirement.

[0058] As an optional embodiment, the cable bending radius automatic measuring instrument based on laser measurement further comprises a power supply 11 arranged on the measuring base 1, and the power supply 11 is electrically connected with the control module 7. The power supply 11 is arranged on the back of the measuring base 1. The power supply 11 is arranged on the back of the measuring base 1. The power supply 11 is arranged on the back of the measuring base 1. The power supply 11 is arranged on the back of the measuring base 1.

[0059] As an optional embodiment, the cable bending radius automatic measuring instrument based on laser measurement further comprises a handle 12 arranged on the back of the measuring base 1. The handle 12 is arranged on the back of the measuring base 1. The handle 12 is arranged on the back of the measuring base 1. The handle 12 is arranged on the back of the measuring base 1. The handle 12 is arranged on the back of the measuring base 1.

[0060] Next, the operation method and working principle of the cable bending radius automatic measuring instrument based on laser measurement in this embodiment are described in detail, so that those skilled in the art can better understand the present application:

[0061] Before measurement, the cable bending radius automatic measuring instrument is leveled, the first button 8 is pressed, the laser points of the first fixed laser ranging probe 5 and the second fixed laser ranging probe 6 are shot on the cable to be measured, then the movable laser ranging probe 4 is slowly adjusted, and the first button 8 is pressed during the adjustment, and the laser point of the movable laser ranging probe 4 is also shot on the cable. The measurement is completed, the processing module calculates the arc length and the cable bending radius according to the measurement principle, and the OLED liquid crystal screen displays the measurement distance length of the three laser ranging probes in the default state. The second button 9 can be pressed to switch the display of the measured cable bending radius and the arc length data of the measured cable.

[0062] The measurement principle is shown in Figure 6 The cable bending radius automatic measuring instrument is placed at point o, and ao, co and bo are measured by the three laser ranging probes. The three side lengths of triangle abc are calculated by the cosine theorem, and the circumscribed radius R is further calculated by the three side lengths of triangle abc. The microcontroller automatically calculates and displays the measurement result.

[0063] The above description is only the preferred embodiment of the present application, and it should be pointed out that those skilled in the art can make some improvements and refinements without departing from the principle of the present application, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. An automatic cable bending radius measuring instrument based on laser measurement, characterized in that, include: Measuring the chassis; An angle detection module is located at the center of the measuring chassis; A pendulum rod, one end of which is rotatably connected to an angle detection module, which can monitor the angle of rotation of the pendulum rod. A mobile laser ranging probe is mounted at the other end of the swing arm, and the mobile laser ranging probe is connected to a third laser ranging sensor; A first fixed laser ranging probe is fixedly mounted on the measuring chassis. The first fixed laser ranging probe and the center of the measuring chassis form a first straight line. The first straight line and the swing arm form a first angle. The first fixed laser ranging probe is connected to a first laser ranging sensor. A second fixed laser ranging probe is fixedly mounted on the measuring chassis and positioned within the first included angle. The second fixed laser ranging probe is connected to the second laser ranging sensor. The control module, which is mounted on the measuring chassis, is electrically connected to the angle detection module, the mobile laser ranging probe, the first fixed laser ranging probe, and the second fixed laser ranging probe, respectively. It is used to process the data transmitted by the angle detection module, the mobile laser ranging probe, the first fixed laser ranging probe, and the second fixed laser ranging probe to obtain the turning radius of the conductor. The angle of the first included angle is at least 110°; The second fixed laser ranging probe and the first fixed laser ranging probe form a second straight line, and the second straight line and the first straight line form a second angle, the angle of which is between 20° and 30°.

2. The automatic cable turning radius measuring instrument based on laser measurement according to claim 1, characterized in that, The length of the pendulum is less than the distance from the center of the measuring chassis to the edge.

3. The automatic cable turning radius measuring instrument based on laser measurement according to claim 1, characterized in that, The measuring chassis is a disc.

4. The automatic cable turning radius measuring instrument based on laser measurement according to claim 1, characterized in that, It also includes multiple buttons mounted on the measuring chassis, each of which is electrically connected to the control module.

5. The automatic cable turning radius measuring instrument based on laser measurement according to claim 1, characterized in that, The mobile laser ranging probe, the first fixed laser ranging probe, and the second fixed laser ranging probe are located at the same level.

6. The automatic cable turning radius measuring instrument based on laser measurement according to claim 1, characterized in that, It also includes a display screen, which is mounted on the measuring chassis and is electrically connected to the control module.

7. The automatic cable turning radius measuring instrument based on laser measurement according to claim 1, characterized in that, The second fixed laser ranging probe and the first fixed laser ranging probe form a second straight line, and the angle detection module is used to detect the angle between the second straight line and the pendulum.

8. The automatic cable turning radius measuring instrument based on laser measurement according to claim 1, characterized in that, It also includes a handle, which is located on the back of the measuring chassis.

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