CN104390984A - Rolling wheel type intelligent rail flaw detection method based on optical-electro-mechanical-hydraulic integration - Google Patents

Abstract

The invention discloses a roller-type rail intelligent flaw detection method based on electromechanical-optical-liquid integration. The technical solution adopted by the present invention to solve the technical problem is: when the flaw detection vehicle moves at a certain speed on the rail, the rollers equipped with probes rotate at a given speed in the opposite direction to the running speed of the flaw detection vehicle. All are equipped with three rollers, and each roller is equipped with a probe. The difference between the probes on adjacent rollers is 120 degrees. Using the speed of the rollers relative to the flaw detection vehicle can obtain higher detection speed and efficiency. The probe has photothermal modulation and wireless transmission functions. When the probe moves above the rail, it will emit laser light. When the laser hits the rail, it will generate heat. This heat will close the damage (such as tiny cracks) in the rail, so that The excited surface wave signal produces obvious peak changes, which are wirelessly transmitted to the control system on the car, and then the location and shape of the rail damage can be determined.

Description

An Intelligent Flaw Detection Method for Roller Rail Based on Mechatronics, Optical and Liquid Integration

technical field

The invention relates to a new method for detecting the damage of steel rails in service.

Background technique

Rail flaw detection vehicle (hereinafter referred to as flaw detection vehicle) has already replaced manual flaw detection equipment in developed countries abroad, and has become the main means of detecting rail damage in service. Due to the advantages of high sensitivity, fast detection speed and accurate positioning of ultrasonic detection of rail fatigue cracks and other internal defects, domestic and foreign flaw detection vehicles have adopted ultrasonic flaw detection technology for internal crack detection, which is limited by the detection mode and ultrasonic technology. The speed is generally 10~70 km/h. Most of the flaw detection vehicles in North America adopt the stop operation method, that is, after the flaw detection vehicle discovers suspicious damage, it needs to stop and have the operator of the flaw detection vehicle conduct an on-site review. After confirmation, mark it and notify the railway maintenance department. The average detection speed is more than 40 below km/h.

Contents of the invention

In order to overcome the deficiencies of the above-mentioned flaw detection vehicle, the present invention provides a new flaw detection method, which can continuously detect the damage of the rail on site with high efficiency.

The technical solution adopted by the present invention to solve the technical problem is: in order to overcome the deficiency that the existing traditional flaw detection equipment cannot efficiently and continuously detect rail damage on site, the principle of the present invention is that when the flaw detection vehicle moves at a certain speed on the rail, The rollers equipped with probes rotate at a given speed in the opposite direction to the running speed of the flaw detection vehicle. There are three rollers on both sides of the flaw detection vehicle, and each roller is equipped with a probe. The difference between the probes on adjacent rollers is 120 degrees. The speed of the roller relative to the flaw detection vehicle can obtain higher detection speed and efficiency. The probe has photothermal modulation and wireless transmission functions. When the probe moves above the rail, it will emit laser light. When the laser hits the rail, it will generate heat. This heat will close the damage (such as tiny cracks) in the rail, so that The excited surface wave signal produces obvious peak changes, which are wirelessly transmitted to the control system on the car, and then the location and shape of the rail damage can be determined.

Compared with prior art, the beneficial effect of the present invention is:

(1) It can efficiently and continuously detect the internal and surface damage of the rail on site, which improves the traditional stop operation method.

(2) The biggest difference between the present invention and the prior art is that compared with the traditional rail flaw detection car, the relative speed of the rollers is used to greatly improve the flaw detection speed and flaw detection efficiency. The detection speed of the traditional flaw detection car is generally 40km/h. The detection speed of the present invention can reach at least 100km/h.

(3) The choice of components in the circuit design pursues the friendly coordination of performance and price, making the control system highly cost-effective and stable and reliable. It not only ensures that the system has high measurement accuracy but also can reduce the cost.

(4) When the flaw detection vehicle is tested on the track, the data can be transmitted to the host computer in real time, and the rail damage distribution can be displayed in real time through the data processing software of the host computer.

Description of drawings

Figure 1 is a schematic diagram of the overall appearance of the present invention.

Fig. 2 is an overall internal schematic diagram of the present invention.

Fig. 3 is a schematic diagram of the flaw detection device of the present invention.

Fig. 4 is a schematic diagram of the probe of the present invention

Reference signs: antenna 1, housing 2, bottom plate 3, front wheel 4, gravity sensor 5, rear wheel 6, rear shock absorber 7, motor Ι8, side frame 9, power supply 10, motor ΙΙ11, gear Ι12, front shock absorber Device 13, probe 14, roller 15, control system 16, hydraulic system 17, gear box 18, brake disc Ι 19, gear Ι Ι 20, roller 21, chain 22, brake disc Ι Ι 23.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the present invention will be described in further detail:

As shown in accompanying drawing 1, accompanying drawing 2, the composition of the present invention comprises shell, front and rear wheels, vehicle frame, motor, gear box, roller, probe, power supply, hydraulic pump.

Embodiment 1. A method for intelligent flaw detection of roller-type rails based on electromechanical-optical-liquid integration,

It consists of front and rear wheels, frame, motor, gearbox, sensor, probe, brake disc, hydraulic pump, and power supply; among them: two rear wheels (6) and gearbox (18) are installed on the rear axle, and the gearbox Among them, the top end cover is connected to the upper end cover through the top bolts, there are two pairs of gears in the gearbox, two-stage speed change, the motor Ι (8) is suspended on the beam through the motor hanger on the frame, and the power supply (10) is fixed on the On the vehicle frame bottom plate, the rear shock absorber (7) is connected with the rear axle through the lower end, and the upper end is connected with the vehicle frame.

Embodiment 2. A roller-type rail intelligent flaw detection method based on electromechanical-optical-liquid integration, wherein: the gravity sensor (5) is installed on the shell (2) of the flaw detection vehicle to check whether the flaw detection vehicle is running smoothly, and the front wheels (4 ), the front shock absorber (13) forms the guiding system by the front axle.

Embodiment 3. A roller-type rail intelligent flaw detection method based on electromechanical-optical-liquid integration, wherein: the flaw detection equipment is composed of a roller (15), a roller (21) and a probe (14), and is installed on both sides of the flaw detection vehicle. There are three rollers, each roller is equipped with a probe, and the difference between the probes on adjacent rollers is 120 degrees. Using the speed of the rollers relative to the flaw detection vehicle can obtain higher detection speed and efficiency. The flaw detection probe on the roller will emit laser light to the rail at a certain speed to detect the damage inside.

Embodiment 4. A roller-type rail intelligent flaw detection method based on electromechanical-optical-liquid integration, wherein: the control box is composed of a single-chip microcomputer, an A/D conversion chip, a display screen, a keyboard, a relay, and a box body, and the sensor communicates with the control box through a signal line. The port on the A/D conversion chip in the box is connected, the A/D conversion chip is connected to the single-chip microcomputer, the output port of the single-chip microcomputer is connected to a relay, and the relay interface is connected to the electromagnet interface of the electromagnetic reversing valve in the hydraulic pump station through a line, and the whole constitutes a complete closed loop.

Working method of the present invention is as follows:

Before the damage detection of the rail, put the flaw detection car on the rail safely and stably, and the operator checks the circuit of the flaw detection car and whether the oil circuit is normal. Set an initial test speed or test time before starting the test. The test will start after the car reaches the specified speed or time. After the car starts, the gravity sensor will monitor the running status of the car at all times and change the measurement through the direct control of the single-chip microcomputer or the host computer. The driving speed of the car can be displayed on the LCD in real time, such as the speed of the car, the test time, the distribution of the damage location, etc., and the measured data can be uploaded to the host computer through the communication interface. Through the relative speed of the rollers relative to the flaw detection vehicle, the detection speed, distance and efficiency of the flaw detection vehicle can be greatly improved.

The roller-type rail intelligent flaw detection equipment using this intelligent flaw detection method has reliable mechanical protection and electrical protection devices, the whole machine is light in weight, small in size, fast and convenient in the flaw detection process, and safe and reliable in work.

The present invention has been exemplarily described above in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above-mentioned method, as long as various modifications of the method concept and technical solutions of the present invention are adopted, or directly applied to other fields without improvement. Occasions, all within the protection scope of the present invention.

Claims (4)

1. one kind based on the liquid integrated roller type intelligent steel rail inspection car of dynamo-electric light, this inspection car is made up of three parts, drive clamping device, failure detector, control device, be made up of front and back wheel, vehicle frame, motor, gear case, sensor, brake disc, hydraulic pump, power supply; It is characterized in that: two trailing wheels (6), gear casees (18) are arranged on rear axle, wherein in gear case, top end cover is connected to upper end cover by top bolt, two pairs of gears are had in wheel box, two-stage speed change, motor Ι (8) is hung on crossbeam by the motor hanger on vehicle frame, and power supply (10) is bolted on frame panel, rear shock absorber (7) is connected with rear axle by bottom, upper end connecting vehicle frame.

2. a kind of roller type intelligent steel rail inspection car liquid integrated based on dynamo-electric light according to claim 1, it is characterized in that: gravity sensor (5) is arranged on inspection car shell (2), be used for checking whether inspection car runs steady, and front-wheel (4), front vibration damper (13) form guidance system by front axle.

3. a kind of roller type intelligent steel rail inspection car liquid integrated based on dynamo-electric light according to claim 1 and 2, it is characterized in that: flaw detection equipment is made up of roller (15), roller bearing (21) and probe (14), three rollers are all housed in inspection car both sides, a probe each roller is equipped with, probe difference 120 degree in adjacent rollers, utilizes the speed of roller overall flaw detection car can obtain higher speed of detection, efficiency; Flaw detection probe on roller will with certain speed to rail Emission Lasers, the damage of detection the inside.

4. a kind of roller type intelligent steel rail inspection car liquid integrated based on dynamo-electric light according to claim 1 and 2, it is characterized in that: control enclosure is made up of single-chip microcomputer, A/D conversion chip, display screen, keyboard, relay, box body, sensor is connected with A/D conversion chip upper port in control enclosure by signal wire, A/D conversion chip is connected with single-chip microcomputer, single-chip microcomputer delivery outlet is connected with relay, relay interface is connected with the electromagnet interface of solenoid directional control valve in hydraulic power unit by circuit, the closed loop that overall composition one is complete.