JP3202406B2 - Diagnosis device for railway rail foundation - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a diagnostic apparatus for automatically diagnosing an abnormality in a railroad rail foundation.

[0002]

2. Description of the Related Art Railroad rail foundations are important for safe driving of vehicles. The structure of such a rail foundation is generally a multi-layered structure consisting of rails, sleepers, gravel, soil, etc., but the bottom soil part is washed away by rainwater, etc. An accident could occur. In order to discover such accidents before they occur, daily visual inspection is performed.

[0003] However, since it is necessary to look around outside the driving time of the vehicle (midnight), the time is limited (several km / km).
hr is the limit) and requires a lot of labor.
In addition, the condition of the soil under the gravel is often invisible by visual inspection, and when it becomes visible, the situation is considerably advanced and it is often too late.

[0004]

In order to automate such an inspection, a diagnostic device using sound or radio waves (radar) has been studied. However, the above-mentioned rail foundation has a multi-layered structure of rails, sleepers, gravel, soil, etc., so that sound waves and radio waves do not sufficiently reach the target, so diagnosis using the above-mentioned sound and radio waves In the device,
There was a problem that an accurate diagnosis could not be made.

An object of the present invention is to solve the above-mentioned problems,
An object of the present invention is to provide a railway rail foundation diagnostic device capable of diagnosing an invisible portion under gravel and capable of performing quantitative, automatic, high-speed, and accurate diagnosis.

[0006]

In order to solve the above-mentioned problems, a diagnostic apparatus for a railway rail foundation according to the present invention comprises: a test carriage steadily traveling on a rail laid on a railway rail foundation; Vibration detection means for detecting at least one of vertical, horizontal, front and rear movements and tilts, and a position detection means for detecting a position on a rail on which the test carriage is traveling; and Abnormality diagnosis means for diagnosing abnormality of the foundation by comparing a vibration component detected by the vibration detection means corresponding to a position detected by the detection means with a normal value detected in advance. . In this case, storage means for storing data for each predetermined section detected by the position detection means is provided, and the abnormality diagnosis means performs comparison and diagnosis for each of the sections.

[0007]

According to the present invention, a vibration detecting means is provided on a test vehicle having a sufficient load by utilizing a phenomenon that when a heavy object passes over the rail, the rail sinks, and the test vehicle is moved at a constant speed. To record the vibration components (movement up and down, left and right and front and back, and inclination of up and down, left and right and front and back, etc.). The vibration component is compared with normal data for each predetermined section detected in advance to determine whether there is an abnormality in the foundation. In addition, since data for each predetermined section is stored in the storage means, and a comparison can be made after adjusting the time axis, diagnosis can be performed efficiently.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments will be described in more detail with reference to the drawings and the like. FIG. 1 is a block diagram showing an embodiment of a railway rail foundation diagnostic device according to the present invention;
FIG. 2 is a plan view showing a test cart used in the diagnostic apparatus of the embodiment of FIG.

As shown in FIG. 1, a diagnostic apparatus 10 of this embodiment includes acceleration sensors 11 and 12, an adder 13, a subtractor 14, an A / D converter 15, a position sensor 16, and a diagnostic unit 1.
7, a storage unit 18 and the like. Diagnostic device 10
Is mounted on the test carriage 20 as shown in FIG. 2, and when the test carriage 20 (heavy object) passes over the rail 32, the rail 32 is laid down by utilizing the phenomenon that the rail 32 sinks. It is intended to diagnose abnormalities in the railway rail foundation that has been used.

The test trolley 20 is a vehicle that steadily travels on a rail laid on a railroad rail foundation. The test cart 20 is provided with four wheels 22 on a cart main body 21 to enable steady running, has a sufficient weight, and has a relatively narrow length of about 3 m between the front and rear wheels 22, for example. It has been set. In FIG. 2, the bogie main body 21 and the wheels 22 are shown by two-dot chain lines in order to make other components easy to see.

The acceleration sensors 11 and 12 are connected to a test cart 20.
Is mounted on the bogie main body 21 for detecting the vertical acceleration of the test bogie 20. Outputs of these acceleration sensors 11 and 12 are supplied to an adder 13 and a subtractor 14.
Connected to each other. The adder 13 calculates the vertical vibration component A by adding the outputs of the acceleration sensors 11 and 12. The subtractor 14 subtracts the outputs of the acceleration sensors 11 and 12 to calculate left and right rotational vibration components B. The displacement or looseness of the rail can be detected based on the rotational vibration component in the left-right direction. The outputs of the adder 13 and the subtractor 14 are converted into digital signals by the A / D converter 15 and then connected to the diagnostic unit 18.

The position sensor 16 is means for detecting a position on the rail 32 on which the test carriage 20 is traveling. Marks are provided at substantially constant intervals in the running direction of the rail 32, and the marks 33 are detected by the position sensor 16.
In this embodiment, a bar code 3
3A is provided, and its position is detected by a barcode reader 16A.

The diagnosis section 18 includes functions such as temporary storage and comparison judgment, and calculates the amount of sinking of the rail 32 based on the acceleration from the acceleration sensors 11 and 12 corresponding to the position detected by the position sensor 16. Then, the abnormality of the railroad rail foundation is diagnosed by comparing it with the normal value. The diagnostic unit 18 compares the measured mark 33 with the next mark 3
3 is temporarily stored and recorded in the recording unit 19 together with the block number as a block signal of one measurement section. Then, the diagnostic unit 18 determines whether or not a signal having the same block number has a large change by comparing with the signal of the previous time, the signal of the previous time, the previous time, and the like, and manages the tendency to obtain a basic looseness. Evaluate the degree of occurrence. Mark 3
The interval of 3 is preferably about several tens of meters to several hundreds of meters. Depending on the performance of the acceleration sensors 11 and 12 and the size of the test cart 20,
It can be selected as appropriate.

It should be noted that, depending on the traveling speed of the test carriage 20,
Although the lengths of the time signals are slightly different, in this case, the signal lengths in the sections may be normalized and then compared. If the traveling speed of the test vehicle 20 is different, the exciting force applied to the rail 32 is also different. However, the permissible speed range can be determined in advance by experiments, and the function of the test vehicle 20 can be run within the speed range. It may be adjusted as follows.

The present invention is not limited to the embodiments described above, and various modifications and changes are possible, which are also included in the present invention. For example, in FIG. 1, the left and right acceleration sensors 11 in FIG.
Although the case where −1 and 12-1 are used has been described as an example, if necessary, similar acceleration sensors 11-2 and 12-1 may be used before and after.
By providing -2, the front and rear rotational vibration components may be detected, or they may be used in combination. It is well known that left and right lateral vibrations are important as quantities related to accidents such as derailment. To detect this amount, one acceleration sensor for detecting vibration in the left-right direction may be provided at the center.

If the position detecting means is detected by a reflection sensor or the like using a gap provided at a joint between the railroad tie and the rail, a nail for fixing the rail to the railroad tie, or the like, there is no need to provide a bar code or the like, so that a simple system can be provided. There are advantages. On the other hand, if a mark 33 having absolute position information such as a number or a bar code is used as the mark 33, by automatically detecting this, the block to be compared is not mistaken, and accurate diagnosis can be performed. it can. When position information such as a railway operation management system can be used, the position information may be used without providing a separate position detecting unit.

The test cart 20 may have a drive source or may be towed by a drive vehicle. Also,
If the measurement can be performed at a sufficiently high speed, it is possible to make a diagnosis during driving of a general vehicle.

[0018]

As described above in detail, according to the present invention, the travel of the test vehicle is performed based on the vertical, horizontal, front and rear movement and tilt vibration components detected by the vibration detecting means provided on the test vehicle. Since the amount of subsidence of the rail to be calculated is calculated, it is possible to diagnose a portion that cannot be seen under the gravel, and it is possible to make a quantitative, automatic, and accurate diagnosis regardless of visual observation or experience. In addition, since the measurement is performed by running the test cart, diagnosis can be performed at high speed. By performing trend management using such a diagnostic device, there is room for taking measures in advance, and so-called predictive maintenance can be performed.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of a railway rail foundation diagnostic device according to the present invention.

FIG. 2 is a plan view showing a test cart used in the diagnostic apparatus of the embodiment of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Diagnostic device 11, 12 Acceleration sensor 13 Adder 14 Subtractor 15 A / D converter 16 Position sensor 17 Diagnostic part 18 Storage part 20 Test trolley 21 Bogie main body 22 Wheel 31 Sleeper 32 Rail 33 Mark

Claims (2)

(57) [Claims] 1. A test vehicle steadily traveling on a rail laid on a rail base for a railway, and a vibration provided on the test vehicle for detecting at least one vibration component of up, down, left, right, front and rear, and inclination. Detecting means, a position detecting means for detecting a position on a rail on which the test cart is traveling, and a vibration component detected by the vibration detecting means corresponding to the position detected by the position detecting means and detected in advance. A railroad rail foundation diagnosis device, comprising: abnormality diagnosis means for diagnosing the foundation abnormality by comparing with a normal value. 2. The apparatus according to claim 1, further comprising storage means for storing data for each predetermined section detected by said position detecting means, wherein said abnormality diagnosing means performs comparison and diagnosis for each of said sections. Diagnostic device for railway rail foundation as described.