CN111561879A - Detection system and method for extracting steel rail contour curve by infrared laser irradiation - Google Patents
Detection system and method for extracting steel rail contour curve by infrared laser irradiation Download PDFInfo
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- CN111561879A CN111561879A CN202010392601.7A CN202010392601A CN111561879A CN 111561879 A CN111561879 A CN 111561879A CN 202010392601 A CN202010392601 A CN 202010392601A CN 111561879 A CN111561879 A CN 111561879A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61K—AUXILIARY EQUIPMENT SPECIALLY ADAPTED FOR RAILWAYS, NOT OTHERWISE PROVIDED FOR
- B61K9/00—Railway vehicle profile gauges; Detecting or indicating overheating of components; Apparatus on locomotives or cars to indicate bad track sections; General design of track recording vehicles
- B61K9/08—Measuring installations for surveying permanent way
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/0002—Inspection of images, e.g. flaw detection
- G06T7/0004—Industrial image inspection
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/10—Segmentation; Edge detection
- G06T7/13—Edge detection
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/30—Subject of image; Context of image processing
- G06T2207/30108—Industrial image inspection
- G06T2207/30136—Metal
Abstract
The invention discloses a detection system for extracting a steel rail contour curve by infrared laser irradiation, which comprises a hardware module and a software module, wherein the hardware module comprises a PC (personal computer) and a laser contour sensor consisting of a CCD (charge coupled device) camera, 650nm infrared linear laser and an embedded mainboard of an ARM-v7 chip, and the PC is connected with the laser contour sensor; the software module comprises: the USB communication module driver, the command sending module, the data receiving and storing module and the data reading and establishing model module; the invention has low cost, simple structure, strong universality, can be used for detecting directly, can also be used as a vehicle-mounted detection system and a handheld detection system, and the system has the characteristics of easy maintenance and redevelopment.
Description
Technical Field
The invention belongs to the technical field of photoelectric information, and particularly relates to a detection system and a detection method for extracting a steel rail contour curve through infrared laser irradiation.
Background
With the rapid development of high-speed railway transportation in China, high-speed rail transportation is one of the necessary travel modes of people. At present, hundreds of millions of transportation volumes are carried on an eight-horizontal eight-vertical railway network in China every year, and the rails, i.e. the 'foundation stones' transported by high-speed railways, generate quite large loads, and the abrasion to the rails is quite large.
Meanwhile, the business mileage of the high-speed railway in China reaches 3.5 kilometers by 2019, and the high-speed railway line in China still has considerable development in the coming years. Under the huge digital quantity, the abrasion of the steel rail is a non-negligible problem, and the excessively abraded steel rail can form a huge threat to the safety of a running train, so that the steel rail needs to be rapidly, safely and conveniently subjected to loss detection.
Disclosure of Invention
The invention provides a detection system and a detection method for extracting a steel rail contour curve by infrared laser irradiation, which aim to obtain a contour and facilitate the rapid composition of various detection system schemes.
The technical scheme adopted by the invention is as follows:
a detection system for extracting a steel rail contour curve by infrared laser irradiation comprises a hardware module and a software module, wherein the hardware module comprises a PC (personal computer), and a laser contour sensor consisting of a CCD (charge coupled device) camera, 650nm infrared linear laser and an embedded mainboard of an ARM-v7 chip, and the PC is connected with the laser contour sensor;
the software module comprises: the USB communication module driver, the command sending module, the data receiving and storing module and the data reading and establishing model module;
the hardware module scans the outline of the steel rail to obtain initial outline data, and the software module processes and visualizes the outline data obtained by the PC.
Further, an embedded mainboard of an ARM-v7 chip in the laser profile sensor is connected with 650nm infrared laser, and the switch of the laser is controlled by the ARM-v7 chip; the embedded mainboard of the ARM-v7 chip is connected with a CCD camera provided with a 650nm filter, and the ARM-v7 chip controls the CCD camera to acquire images and output data after processing; the PC is connected with the laser profile sensor through the USB communication module drive.
Furthermore, the software in the software module drives the USB communication module to drive and communicate with the laser profile sensor, and at the moment, the software can send a command to the laser profile sensor through the command sending module through the communication; the laser contour sensor acquires data, the data are driven by the USB communication module to be transmitted to software, and the software stores the data to the local through the data receiving and storing module; the software processes local data through a data reading and establishing model module and then models a contour model.
Further, the hardware module may output the contour data acquired at the current position 50 times to the software module within 1 second.
A detection method for extracting a steel rail contour curve by infrared laser irradiation comprises the following steps:
step 1, fixing a laser profile sensor on a steel rail;
step 2, data acquisition:
step 2.1: PC software sends a scanning start command in the command sending module to the laser profile sensor through a USB communication module drive, an ARM-v7 chip receives the command and then controls 650nm infrared laser and a CCD camera to start scanning, the CCD camera transmits pictures recorded at the moment to the ARM-v7 chip, the CCD camera outputs speed transmission data of profile data obtained at the current position for 50 times in every 1 second, until the PC software selects a stop option, and the laser profile sensor stops scanning after sending a stop command to the laser profile sensor;
step 2.2: the laser contour sensor sweeps out a laser line on a steel rail, the laser line has a line width, so that a contour line directly extracted is a very narrow contour surface, an ARM-v7 chip carries out image binarization processing on a transmitted picture, data of a plurality of laser lines are filtered through a mathematical theory of median theorem, and then the laser contour sensor is driven by a USB communication module to obtain an accurate contour line and output the accurate contour line to a PC;
step 3, the laser profile sensor measures the (Z, X) value of each point on the bright line, and the PC stores the data to the local through a data receiving and storing module in the software;
and 4, processing local data by the software through a data reading and establishing model, modeling a contour model, converting the (Z, X) value of each point into the values of the X axis and the y axis of the steel rail section, and displaying the standard contour of the rail head of the steel rail on a screen.
Further, linear laser emitted by the laser profile sensor in the step 1 is parallel to the cross section of the steel rail, the horizontal distance between the laser profile sensor and the highest position of the steel rail is 30cm, the height distance is 30cm, the CCD camera is arranged above the steel rail in a contrast mode, and an included angle in the vertical direction is 45 degrees.
Compared with the prior art, the invention has the following effective effects: the detection system has low cost, simple structure and strong universality, can be used as a vehicle-mounted detection system and a handheld detection system, and can also be directly used for detection; the system has the characteristics of easy maintenance and redevelopment, and the performance of the system can be selected and redeveloped by a subsequent scheme decision maker and a developer.
Drawings
FIG. 1 is a block diagram of a detection system for extracting a rail profile curve by infrared laser irradiation;
FIG. 2 is a flow chart of a detection method for extracting a rail profile curve by infrared laser irradiation;
FIG. 3 is a schematic view of a detection system for extracting a rail profile curve by infrared laser irradiation;
FIG. 4 is a perspective view of a detection system for extracting a rail profile curve by infrared laser irradiation;
FIG. 5 is a schematic view of a laser profile sensor according to the present invention;
FIG. 6 is a graph obtained by modeling PC processes.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, a detection system for extracting a rail profile curve by infrared laser irradiation includes a hardware module and a software module, the hardware module scans a profile of a rail to obtain initial profile data, the software module processes and visualizes the profile data obtained by a PC, and the hardware module can output the profile data obtained at the current position 50 times to the software module within 1 second.
The hardware module comprises a PC (personal computer) and a laser profile sensor consisting of a CCD (charge coupled device) camera, 650nm infrared linear laser and an embedded mainboard of an ARM-v7 chip, wherein the PC is connected with the laser profile sensor through a USB (universal serial bus) 3.0; an embedded mainboard of an ARM-v7 chip in the laser profile sensor is connected with 650nm infrared laser, and the switch of the laser is controlled by the ARM-v7 chip; the embedded mainboard of the ARM-v7 chip is connected with a CCD camera provided with a 650nm filter, and the ARM-v7 chip controls the CCD camera to acquire images and output data after processing. A schematic of the laser profile sensor is shown in fig. 5.
The software module comprises: the USB communication module driver, the command sending module, the data receiving and storing module and the data reading and establishing model module; the software in the software module drives the USB communication module to drive and communicate with the laser profile sensor, and at the moment, the software can send a command to the laser profile sensor through the command sending module through the communication; the laser contour sensor acquires data, the data are driven by the USB communication module to be transmitted to software, and the software stores the data to the local through the data receiving and storing module; the software processes local data through a data reading and establishing model module and then models a contour model.
As shown in fig. 2, a detection method for extracting a rail profile curve by infrared laser irradiation includes the following steps:
step 1, fixing a laser profile sensor on a steel rail, wherein linear laser emitted by the laser profile sensor is parallel to the cross section of the steel rail, the horizontal distance between the laser profile sensor and the highest position of the steel rail is 30cm, the height distance is 30cm, a CCD camera is arranged above the steel rail in a contrast mode, and an included angle in the vertical direction is 45 degrees, as shown in FIGS. 3-4;
step 2, data acquisition and processing:
step 2.1: PC software sends a scanning start command in the command sending module to the laser profile sensor through a USB communication module drive, an ARM-v7 chip receives the command and then controls 650nm infrared laser and a CCD camera to start scanning, the CCD camera transmits pictures recorded at the moment to the ARM-v7 chip, the CCD camera outputs speed transmission data of profile data obtained at the current position for 50 times in every 1 second, until the PC software selects a stop option, and the laser profile sensor stops scanning after sending a stop command to the laser profile sensor;
step 2.2: the laser contour sensor sweeps out a laser line on a steel rail, the laser line has a line width, so that the directly extracted contour line is a very narrow contour surface, an ARM-v7 chip carries out image binarization processing on a transmitted picture, data of a plurality of laser lines are filtered through the mathematical theory of median theorem, and then the laser contour sensor outputs the acquired data to a PC through the drive of a USB communication module;
step 3, the laser profile sensor measures the (Z, X) value of each point on the bright line, and the PC stores the data to the local through a data receiving and storing module in the software;
and 4, processing local data by the software through a data reading and establishing model, modeling a contour model, converting the (Z, X) value of each point into the values of the X axis and the y axis of the steel rail section, and displaying the standard contour of the rail head of the steel rail on a screen, wherein the display map is shown in fig. 6.
Claims (6)
1. A detection system for extracting a steel rail contour curve by infrared laser irradiation is characterized by comprising a hardware module and a software module, wherein the hardware module comprises a PC (personal computer), and a laser contour sensor consisting of a CCD (charge coupled device) camera, 650nm infrared linear laser and an embedded mainboard of an ARM-v7 chip, and the PC is connected with the laser contour sensor;
the software module comprises: the USB communication module driver, the command sending module, the data receiving and storing module and the data reading and establishing model module;
the hardware module scans the outline of the steel rail to obtain initial outline data, and the software module processes and visualizes the outline data obtained by the PC.
2. The detection system for extracting the profile curve of the steel rail through the infrared laser irradiation as claimed in claim 1, wherein the embedded main board of the ARM-v7 chip in the laser profile sensor is connected with 650nm infrared linear laser, and the switch of the laser is controlled through the ARM-v7 chip; the embedded mainboard of the ARM-v7 chip is connected with a CCD camera provided with a 650nm filter, and the ARM-v7 chip controls the CCD camera to acquire images and output data after processing; the PC is connected with the laser profile sensor through the USB communication module drive.
3. The detection system for extracting the steel rail profile curve by infrared laser irradiation as claimed in claim 1, wherein a software driving USB communication module in the software module drives and communicates with the laser profile sensor, and at the moment, the software can send a command to the laser profile sensor through the command sending module through the communication; the laser contour sensor acquires data, the data are driven by the USB communication module to be transmitted to software, and the software stores the data to the local through the data receiving and storing module; the software processes local data through a data reading and establishing model module and then models a contour model.
4. The detection system for extracting the profile curve of the steel rail through infrared laser irradiation as claimed in claim 1, wherein the hardware module can output the profile data acquired at the current position 50 times to the software module within 1 second.
5. A detection method for extracting a steel rail contour curve by infrared laser irradiation is characterized by comprising the following steps:
step 1, fixing a laser profile sensor on a steel rail;
step 2, data acquisition:
step 2.1: PC software sends a scanning start command in the command sending module to the laser profile sensor through a USB communication module drive, an ARM-v7 chip receives the command and then controls 650nm infrared laser and a CCD camera to start scanning, the CCD camera transmits pictures recorded at the moment to the ARM-v7 chip, the CCD camera outputs speed transmission data of profile data obtained at the current position for 50 times in every 1 second, until the PC software selects a stop option, and the laser profile sensor stops scanning after sending a stop command to the laser profile sensor;
step 2.2: the laser contour sensor sweeps out a laser line on a steel rail, the laser line has a line width, so that a contour line directly extracted is a very narrow contour surface, an ARM-v7 chip carries out image binarization processing on a transmitted picture, data of a plurality of laser lines are filtered through a mathematical theory of median theorem, and then the laser contour sensor is driven by a USB communication module to obtain an accurate contour line and output the accurate contour line to a PC;
step 3, the laser profile sensor measures the (Z, X) value of each point on the bright line, and the PC stores the data to the local through a data receiving and storing module in the software;
and 4, processing local data by the software through a data reading and establishing model, modeling a contour model, converting the (Z, X) value of each point into the values of the X axis and the y axis of the steel rail section, and displaying the standard contour of the rail head of the steel rail on a screen.
6. The method for detecting the extraction of the steel rail profile curve through the infrared laser irradiation as claimed in claim 5, wherein the linear laser emitted by the laser profile sensor in the step 1 is parallel to the cross section of the steel rail, the horizontal distance between the laser profile sensor and the highest position of the steel rail is 30cm, the height distance is 30cm, and the CCD camera is arranged above the steel rail in a contrast manner, and the included angle in the vertical direction is 45 degrees.
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| CN202010392601.7A CN111561879A (en) | 2020-05-11 | 2020-05-11 | Detection system and method for extracting steel rail contour curve by infrared laser irradiation |
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| CN202010392601.7A CN111561879A (en) | 2020-05-11 | 2020-05-11 | Detection system and method for extracting steel rail contour curve by infrared laser irradiation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113514003A (en) * | 2021-03-16 | 2021-10-19 | 西安理工大学 | 5G-based laser scanning steel rail abrasion detection system and method |
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Application publication date: 20200821 |