Cable turning radius measuring method and device based on omni-directional laser radar technology

Abstract

The invention discloses a cable turning radius measurement method based on an omnibearing laser radar technology, and the method comprises the following steps: setting a laser radar sensor, and obtaining a measurement point at the outer side of a bent cable; the laser radar sensor measures a first distance from the measuring point to the left arc edge of the bent cable, measures a second distance from the measuring point to the right arc edge of the bent cable, and measures a third distance from the measuring point to the arc edge perpendicular to the bent cable; obtaining a first distance, a second distance and a third distance, and calculating the turning radius of the cable according to the first distance, the second distance and the third distance. According to the invention, data acquisition of the turning radius of the cable and abnormal condition judgment of the turning radius of the cable can be realized automatically, and meanwhile, the method is not influenced by the environment, and is accurate in detection and high in efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of cable turning measurement, and in particular to a cable turning radius measurement method and device based on omnidirectional laser radar technology. Background Art

[0002] During the cable laying process, if the turning radius is too small, the cable may be subjected to excessive bending stress, resulting in damage to the cable insulation layer and conductor. For example, the insulation layer may crack, wear or even break, and the conductor may deform or break. Especially for some cables with larger cross-sections or armored cables, their rigidity is greater and the requirements for the turning radius are more stringent. If the turning radius does not meet the requirements, mechanical damage is more likely to occur, which will affect the normal operation of the cable and even cause electrical failures.

[0003] At present, the commonly used cable turning radius measurement methods mainly include manual measurement, mechanical measurement and optical measurement. Among them, the manual measurement method mainly relies on experienced workers to use tape measures or distance meters to conduct on-site measurements, and then calculate the turning radius. The mechanical measurement method is to use a special measuring instrument to perform physical contact measurement of the cable, such as using a pipe bender or a pipe bender. The optical measurement method is to use optical principles to perform non-contact measurement of the cable, such as using a laser rangefinder or image processing technology. However, these measurement methods have some disadvantages. For example, the laser rangefinder can only measure the distance of a single point and cannot fully cover the shape changes at the cable bend. Therefore, the calculated turning radius has limited accuracy. Manual measurement requires manual measurement of the distance of multiple points one by one and manual calculation of the turning radius, which is inefficient. In addition, for the measurement of cable turning radius in complex environments, such as when there are obstructions or insufficient light, the measurement effect of the laser rangefinder will be greatly affected. Summary of the invention

[0004] The present invention provides a cable turning radius measurement method and device based on omnidirectional laser radar technology, which can realize automatic data collection of the cable turning radius and abnormal condition judgment of the cable turning radius, and is not affected by the environment, with accurate detection and high efficiency. The specific technical solution is as follows:

[0005] A cable turning radius measurement method based on omnidirectional laser radar technology comprises the following steps:

[0006] Setting up the LiDAR sensor to obtain measurement points on the outside of the curved cable;

[0007] The laser radar sensor measures a first distance from a measuring point to a left arc edge of the curved cable, a second distance from a measuring point to a right arc edge of the curved cable, and a third distance from a measuring point to an arc edge perpendicular to the curved cable;

[0008] Obtaining a first distance, a second distance, and a third distance, and calculating a cable turning radius according to the first distance, the second distance, and the third distance;

[0009] Use the following formula to calculate the cable bend radius:

[0010]

[0011] Wherein, R is the cable turning radius; L1 is the first distance; L2 is the second distance; and h is the third distance.

[0012] Preferably, the calculating the cable turning radius according to the first distance, the second distance and the third distance comprises the following steps:

[0013] Select the cable bend radius specification for the cable to be tested;

[0014] Calculate the cable turning radius and obtain the calculation result of the cable turning radius;

[0015] Based on the cable turning radius specifications, determine whether it is within a reasonable range.

[0016] A cable turning radius measuring device based on omnidirectional laser radar technology, comprising a data processing module, a display module, a data acquisition module and a power supply module;

[0017] The data acquisition module includes a first laser radar sensor, a second laser radar sensor and a third laser radar sensor;

[0018] The first laser radar sensor is used to detect a first distance, the second laser radar sensor is used to detect a second distance, and the third laser radar sensor is used to detect a third distance; the data processing module receives distance information of the first distance, the second distance, and the third distance transmitted by the first laser radar sensor, the second laser radar sensor, and the third laser radar sensor;

[0019] The data processing module includes a first processing unit for acquiring a first distance, a second distance, and a third distance; a second processing unit for calculating a cable turning radius according to the first distance, the second distance, and the third distance;

[0020] The display module is used to receive and display the detection information transmitted by the data processing module;

[0021] The power supply module provides electric energy for the data processing module, the display module and the data acquisition module.

[0022] Preferably, it also includes an alarm module; the alarm module receives the alarm information of the data processing module, and the alarm is an audible and visual alarm for issuing an alarm.

[0023] Preferably, it also includes a control module; the control module includes a switch button, a cable specification selection button and a mode switching button; the switch button is used to issue an instruction to the data processing module to start or shut down the device; the cable specification selection button is used to issue an instruction to the data processing module to switch the standard of cable turning radius of different specifications; the mode switching button is used to issue an instruction to the data processing module to switch the working mode.

[0024] Preferably, the display module includes a display screen and a speaker; the display screen is used to display the measurement information of the cable turning radius issued by the data processing module; the speaker is used to voice broadcast the measurement information of the cable turning radius issued by the data processing module.

[0025] Preferably, the first laser radar sensor is arranged on the bottom surface of the lower end of the device, the second laser radar sensor is arranged on the left side of the lower end of the device, and the third laser radar sensor is arranged on the right side of the lower end of the device.

[0026] A computer-readable storage medium is used to store program codes, and the program codes are used to execute the steps of the above-mentioned cable turning radius measurement method based on omnidirectional laser radar technology.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. Improve measurement accuracy

[0029] This cable turning radius measuring device based on omnidirectional laser radar technology uses three laser radar sensors to accurately measure the distance to different positions of the cable. Compared with the traditional laser rangefinder that can only measure the distance of a single point, it can fully cover the shape changes of the cable turning. The data processing module performs accurate calculations based on the three distance information, greatly improving the measurement accuracy of the cable turning radius. It avoids calculation errors caused by incomplete measurements and provides more accurate data support for cable laying and maintenance.

[0030] 2. Improve measurement efficiency

[0031] Compared with manual measurement, this device does not require manual measurement of the distance of multiple points and manual calculation of the turning radius. It can automatically collect distance information and quickly calculate and output the results. This greatly improves the measurement efficiency, saves manpower and time costs, and is especially suitable for large-scale cable laying or scenes that require frequent measurements.

[0032] 3. Adapt to complex environments

[0033] In complex environments, such as when there are obstructions or insufficient light, the measurement effect of traditional laser rangefinders will be greatly affected, while the laser radar technology used in this device has stronger environmental adaptability. The three laser radar sensors can accurately obtain distance information in various complex environments, without being restricted by obstructions and light conditions, ensuring the smooth progress of measurement work and improving the reliability and stability of measurement.

[0034] 4. Automatic measurement and display

[0035] The device realizes automated measurement. The data processing module automatically receives and processes distance information and calculates the cable turning radius. The display module can receive and display detection information in a timely manner, so that users can intuitively understand the measurement results. The automated measurement process without human intervention reduces human errors and improves the accuracy and consistency of the measurement. At the same time, the setting of the display module makes the measurement results easier to read and analyze, which facilitates the evaluation and adjustment of the cable turning radius. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0037] Figure 1 It is the system principle diagram of the present invention;

[0038] Figure 2 The figure is a flow chart of the method of the present invention. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0041] It should also be understood that the terms used in the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0042] It should be further understood that the term "and / or" used in the present description and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0043] Example 1

[0044] A cable turning radius measurement method based on omnidirectional laser radar technology comprises the following steps:

[0045] Setting up the LiDAR sensor to obtain measurement points on the outside of the curved cable;

[0046] The laser radar sensor measures a first distance from a measuring point to a left arc edge of the curved cable, a second distance from a measuring point to a right arc edge of the curved cable, and a third distance from a measuring point to an arc edge perpendicular to the curved cable;

[0047] Obtaining a first distance, a second distance, and a third distance, and calculating a cable turning radius according to the first distance, the second distance, and the third distance;

[0048] Use the following formula to calculate the cable bend radius:

[0049]

[0050] Wherein, R is the cable turning radius; L1 is the first distance; L2 is the second distance; and h is the third distance.

[0051] The use of lidar sensors for measurement has high precision and high speed, and can accurately obtain the cable turning radius, providing reliable data support for cable laying and maintenance.

[0052] Example 2

[0053] This embodiment is different from Embodiment 1 in that the calculation of the cable turning radius according to the first distance, the second distance and the third distance includes the following steps:

[0054] Select the cable bend radius specification for the cable to be tested;

[0055] Calculate the cable turning radius and obtain the calculation result of the cable turning radius;

[0056] Based on the cable turning radius specifications, determine whether it is within a reasonable range.

[0057] First, select the turning radius specification of the cable to be tested. After calculating the cable turning radius, determine whether it is within a reasonable range according to the specification. It can detect and judge according to different cable specifications to ensure that the cable turning radius meets the requirements and improve the quality and safety of cable installation. At the same time, it helps to find out the situation that does not meet the specifications in advance and avoid possible problems in the future.

[0058] The working principle of this embodiment is the same as that of Embodiment 1.

[0059] Example 3

[0060] A cable turning radius measuring device based on omnidirectional laser radar technology, comprising a data processing module, a display module, a data acquisition module and a power supply module;

[0061] The data acquisition module includes a first laser radar sensor, a second laser radar sensor and a third laser radar sensor;

[0062] The first laser radar sensor is used to detect a first distance, the second laser radar sensor is used to detect a second distance, and the third laser radar sensor is used to detect a third distance; the data processing module receives distance information of the first distance, the second distance, and the third distance transmitted by the first laser radar sensor, the second laser radar sensor, and the third laser radar sensor;

[0063] The data processing module includes a first processing unit for acquiring a first distance, a second distance, and a third distance; a second processing unit for calculating a cable turning radius according to the first distance, the second distance, and the third distance;

[0064] The display module is used to receive and display the detection information transmitted by the data processing module;

[0065] The power supply module provides electric energy for the data processing module, the display module and the data acquisition module.

[0066] The first, second and third laser radar sensors in the data acquisition module detect the first distance, the second distance and the third distance respectively, and transmit the distance information to the data processing module. The first processing unit of the data processing module obtains the distance information, and the second processing unit calculates the cable turning radius according to the distance information. The display module receives and displays the detection information transmitted by the data processing module, and the power supply module provides power to each module. Through a special measuring device, automated data acquisition and processing are realized, and the measurement efficiency and accuracy are improved. The display module can intuitively display the measurement results for users to view.

[0067] The working principle of this embodiment is the same as that of Embodiment 1.

[0068] Example 4

[0069] This embodiment differs from the embodiment 3 in that it further comprises an alarm module; the alarm module receives the alarm information of the data processing module, and the alarm is an audible and visual alarm for issuing an alarm.

[0070] The alarm module receives the alarm information from the data processing module, and when the cable turning radius exceeds the reasonable range or other abnormal conditions occur, the sound and light alarm sounds an alarm. By adding the alarm function, users can be reminded of abnormal cable turning radius in time, thereby improving safety and reliability and avoiding potential safety hazards.

[0071] The working principle of this embodiment is the same as that of Embodiment 1.

[0072] Example 5

[0073] This embodiment differs from Embodiment 4 in that it further includes a control module; the control module includes a switch button, a cable specification selection button and a mode switching button; the switch button is used to issue an instruction to start or shut down the device to the data processing module; the cable specification selection button is used to issue an instruction to the data processing module to switch the standard of turning radius of cables of different specifications; the mode switching button is used to issue an instruction to the data processing module to switch the working mode.

[0074] The switch button is used to send a command to the data processing module to start or shut down the device; the cable specification selection button is used to switch the standard instructions for the turning radius of cables of different specifications; the mode switching button is used to switch the working mode instructions. Press the mode switching key to select the corresponding functional mode (laser ranging sensor emits laser mode at the same time; measurement data is voice broadcast; display screen changes backlight mode). The control module makes the operation of the device more convenient and flexible. Users can start and shut down the device according to actual needs, select different cable specifications and working modes, and improve the applicability of the device.

[0075] Example 6

[0076] This embodiment differs from Embodiment 5 in that the display module includes a display screen and a speaker; the display screen is used to display the measurement information of the cable turning radius issued by the data processing module; and the speaker is used to voice broadcast the measurement information of the cable turning radius issued by the data processing module.

[0077] The display screen is used to display the cable turning radius measurement information sent by the data processing module, and the speaker is used to voice broadcast the measurement information. Through the combination of the display screen and the speaker, multiple ways of displaying the measurement results are provided, which facilitates users to obtain information in different scenarios and improves the user experience.

[0078] The working principle of this embodiment is the same as that of Embodiment 1.

[0079] Example 7

[0080] The difference between this embodiment and Embodiment 6 is that the first laser radar sensor is arranged on the bottom surface of the lower end of the device, the second laser radar sensor is arranged on the left side of the lower end of the device, and the third laser radar sensor is arranged on the right side of the lower end of the device.

[0081] The first laser radar sensor is arranged on the bottom surface of the lower end of the device, the second laser radar sensor is arranged on the left side of the lower end of the device, and the third laser radar sensor is arranged on the right side of the lower end of the device, so that the measurement is more accurate and stable. After all data parameters are set, the device is placed at any position on the cable. After 2-3 seconds, the cable turning radius and turning multiple will be displayed on the display screen and the corresponding alarm information will be issued.

[0082] The working principle of this embodiment is the same as that of Embodiment 1.

[0083] Example 8

[0084] A computer-readable storage medium is used to store program codes, and the program codes are used to execute the steps of the above-mentioned cable turning radius measurement method based on omnidirectional laser radar technology.

[0085] In summary, the present invention has the following beneficial effects:

[0086] 1. Improve measurement accuracy

[0087] This cable turning radius measuring device based on omnidirectional laser radar technology uses three laser radar sensors to accurately measure the distance to different positions of the cable. Compared with the traditional laser rangefinder that can only measure the distance of a single point, it can fully cover the shape changes of the cable turning. The data processing module performs accurate calculations based on the three distance information, greatly improving the measurement accuracy of the cable turning radius. It avoids calculation errors caused by incomplete measurements and provides more accurate data support for cable laying and maintenance.

[0088] 2. Improve measurement efficiency

[0089] Compared with manual measurement, this device does not require manual measurement of the distance of multiple points and manual calculation of the turning radius. It can automatically collect distance information and quickly calculate and output the results. This greatly improves the measurement efficiency, saves manpower and time costs, and is especially suitable for large-scale cable laying or scenes that require frequent measurements.

[0090] 3. Adapt to complex environments

[0091] In complex environments, such as when there are obstructions or insufficient light, the measurement effect of traditional laser rangefinders will be greatly affected, while the laser radar technology used in this device has stronger environmental adaptability. The three laser radar sensors can accurately obtain distance information in various complex environments, without being restricted by obstructions and light conditions, ensuring the smooth progress of measurement work and improving the reliability and stability of measurement.

[0092] 4. Automatic measurement and display

[0093] The device realizes automated measurement. The data processing module automatically receives and processes distance information and calculates the cable turning radius. The display module can receive and display detection information in a timely manner, so that users can intuitively understand the measurement results. The automated measurement process without human intervention reduces human errors and improves the accuracy and consistency of the measurement. At the same time, the setting of the display module makes the measurement results easier to read and analyze, which facilitates the evaluation and adjustment of the cable turning radius.

[0095] Those of ordinary skill in the art will appreciate that the units of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition of each example has been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0096] In the embodiments provided by the present invention, it should be understood that the division of units is only a logical function division, and there may be other division methods in actual implementation, for example, multiple units can be combined into one unit, one unit can be split into multiple units, or some features can be ignored, etc.

[0097] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0098] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-0nlyMemory), random access memory (RAM, RandomAccessMemory), mobile hard disk, magnetic disk or optical disk, etc., which can store program code.

[0099] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A cable turning radius measurement method based on omnidirectional laser radar technology, characterized in that: The following steps are involved: Setting up the LiDAR sensor to obtain measurement points on the outside of the curved cable; The laser radar sensor measures a first distance from a measuring point to a left arc edge of the curved cable, a second distance from a measuring point to a right arc edge of the curved cable, and a third distance from a measuring point to an arc edge perpendicular to the curved cable; Obtaining a first distance, a second distance, and a third distance, and calculating a cable turning radius according to the first distance, the second distance, and the third distance; Use the following formula to calculate the cable bend radius: Wherein, R is the cable turning radius; L1 is the first distance; L2 is the second distance; and h is the third distance.

2. According to claim 1, a cable turning radius measurement method based on omnidirectional laser radar technology is characterized in that: The following steps are involved: The method of calculating the cable turning radius according to the first distance, the second distance and the third distance includes the following steps: Select the cable bend radius specification for the cable to be tested; Calculate the cable turning radius and obtain the calculation result of the cable turning radius; Based on the cable turning radius specifications, determine whether it is within a reasonable range.

3. A cable turning radius measuring device based on omnidirectional laser radar technology, characterized in that: It includes a data processing module, a display module, a data acquisition module and a power supply module; The data acquisition module includes a first laser radar sensor, a second laser radar sensor and a third laser radar sensor; The first laser radar sensor is used to detect a first distance, the second laser radar sensor is used to detect a second distance, and the third laser radar sensor is used to detect a third distance; the data processing module receives distance information of the first distance, the second distance, and the third distance transmitted by the first laser radar sensor, the second laser radar sensor, and the third laser radar sensor; The data processing module includes a first processing unit for acquiring a first distance, a second distance, and a third distance; a second processing unit for calculating a cable turning radius according to the first distance, the second distance, and the third distance; The display module is used to receive and display the detection information transmitted by the data processing module; The power supply module provides electric energy for the data processing module, the display module and the data acquisition module.

4. The cable turning radius measuring device based on omnidirectional laser radar technology according to claim 1 is characterized in that: It also includes an alarm module; the alarm module receives the alarm information of the data processing module, and the alarm is an audible and visual alarm for issuing an alarm.

5. The cable turning radius measuring device based on omnidirectional laser radar technology according to claim 1 is characterized in that: It also includes a control module; the control module includes a switch button, a cable specification selection button and a mode switching button; the switch button is used to issue an instruction to start or shut down the device to the data processing module; the cable specification selection button is used to issue an instruction to the data processing module to switch the standard of cable turning radius of different specifications; the mode switching button is used to issue an instruction to the data processing module to switch the working mode.

6. The cable turning radius measuring device based on omnidirectional laser radar technology according to claim 1 is characterized in that: The display module includes a display screen and a speaker; the display screen is used to display the measurement information of the cable turning radius sent by the data processing module; the speaker is used to voice broadcast the measurement information of the cable turning radius sent by the data processing module.

7. The cable turning radius measuring device based on omnidirectional laser radar technology according to claim 1 is characterized in that: The first laser radar sensor is arranged on the bottom surface of the lower end of the device, the second laser radar sensor is arranged on the left side of the lower end of the device, and the third laser radar sensor is arranged on the right side of the lower end of the device.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium is used to store program codes, and the program codes are used to execute the steps of the above-mentioned cable turning radius measurement method based on omnidirectional laser radar technology.

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