JP3107115B2 - Orbit inspection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a track inspection apparatus capable of detecting an irregular track of a railway line and obtaining an actual shape representing the amount of track deformation, and more particularly to improving the reliability of the inspection result. It is an object of the present invention to provide a trajectory inspection device capable of performing the above.

[0002]

2. Description of the Related Art Orbital alignment is measured mainly by a thread tension type crossing method by hand, or by using an orbital inspection device, and linearity is generally managed by the arrow value. . In actual measurement, inspection points A, B, C... Are selected at equal intervals on the rail to be measured, and a straight line (referred to as a chord) connecting the inspection points A and C is separated from point B in the horizontal direction ( This is a method of measuring B, C, D,... While sequentially moving these. As the inspection method, there are a manual method and a method automatically performed by an inspection vehicle.

However, the inspection value data string obtained by this method indicates the relative amount of the displacement of the center point with respect to the preceding and following base points, and does not represent the actual linearity of the trajectory. Therefore, when performing orbital alignment work, the amount of adjustment at each measurement point must be calculated manually by an expert or by using a curve adjustment calculator. From the standpoint of a person who performs track maintenance, it is desired to display a real linear shape representing the actual track shape.

[0004] When converting a measured value data sequence (positive arrow value) into a real linear data sequence, the measured value is required to be as close as possible to the true value, and errors must be mixed. For this reason, conventionally, a method has been adopted in which the measurement is repeated a plurality of times for the same trajectory, and the measured values are compared with each other to detect and exclude the protrusion value.

[0005]

Conventionally, a method of repeatedly performing inspection and measurement on the same trajectory a plurality of times, comparing the inspection value data strings with each other at each inspection point, and detecting and excluding protrusion values. Therefore, if the allowable value is α, the measured value (the value of the arrow)
Is within the range of α, it is taken in as a normal value. However, even if the Masaya value is limited to the range of α,
When converted to a real linear form, there is a problem that a large error different from the actual one occurs.

[0006] That is, in the trajectory where the inspection values at each inspection point should be all 0 (straight line) like the normal values shown in FIG.
Assuming that the inspection value data strings shown in FIGS. 5B and 5C are obtained, the maximum value of the inspection values shown in FIGS. And converted to a real linear data sequence. When the normal value shown in FIG. 5A is converted into a real line, it becomes a straight line as shown in FIG. 6A. However, when the straight arrow data sequence shown in FIG. 5B is converted to a real linear shape, the straight arrow value α is converted to a linear shape that continues inclining rightward and downward from the detected inspection point infinitely as shown in FIG. 6B. . Further, when FIG. 5C is converted into a real linear form, as shown in FIG. 6C, it is converted into a real linear form having a deformation amount of the maximum value α.

The inspection errors shown in FIGS. 5B and 5C are errors that happen to occur during the inspection, but are overlooked because the error values are within the allowable range, and are taken in as the inspection values. As a result, it is determined that a large error has occurred after the conversion into the real linear form. Conventionally, the conversion to the actual linear form is performed by bringing the inspection data back from the site, and if it is found that the conversion to the real linear form involves a large error, it is necessary to return to the site and perform the inspection again. Therefore, there is a disadvantage in that it is troublesome and the cost required for inspection is high.

[0008] An object of the present invention is that even if an unexpected measurement error is mixed during the measurement, the error can be detected on the spot, so that the measurement can be re-executed immediately, and thus the detection can be performed immediately. An object of the present invention is to provide a trajectory inspection device capable of improving the reliability of a measurement result.

[0009]

According to the present invention, a real linear conversion means is constituted by an arithmetic processing unit, and a predetermined range of a trajectory is sequentially and continuously measured by a threading type crossing method, and a yaw value data sequence is obtained. obtain. Simultaneously with the completion of the inspection, the inspection result is converted into a real linear, and the converted real linear data string is stored in the storage means for each of the inspection points.

[0010] A second measurement is performed, and the yaw value data sequence obtained by the second measurement is converted into a real linear data sequence, stored in storage means, and the first real linear data sequence is stored in the storage means. The real linear data sequence of the second time is compared for each inspection point,
An inspection point whose difference exceeds an allowable value is detected, and the inspection point is displayed as a defective inspection point. Re-measurement is performed only for the defective measurement point where a large error has occurred. For the third measurement data and the other measurement points, the first or second measurement data is used and the third real linear data is obtained. Get. The first real linear data sequence, the third real linear data sequence, and 2
The third real linear data sequence is compared with the third real linear data sequence for each test point, and if any one falls within the allowable range, the third real linear data sequence is stored as normal real linear data. Leave.

If the third actual linear data sequence does not fall within the allowable range, the fourth actual linear data sequence is obtained by performing the fourth inspection for the detection point where an error has occurred. The fourth real linear data sequence is compared with the first to third real linear data sequences, and if the comparison result is within the allowable value for all the inspection points, the fourth real linear data sequence is left in the storage means. When a test point that does not fall within the allowable value is detected, the same procedure is repeated to obtain a real linear data sequence with higher reliability.

Therefore, according to the present invention, since the result converted to the real linear data string is compared, a comparison without error can be performed, and a highly reliable inspection result can be obtained.

[0013]

FIG. 1 shows an embodiment of a track inspection apparatus according to the present invention. In the figure, reference numeral 10 denotes input means. This input means 1
0 performs an operation of sequentially inputting the deviation amount of the trajectory detected by the thread tension type intersection method to the arithmetic processing unit 20. FIG. 2 and FIG. 3 show a schematic configuration of the input means 10. 2 and 3 show a three-wheel inspection vehicle. The inspection vehicle is provided with a frame 31 running on the rail to be measured 30, a stay 34 which is passed from the frame 31 to the opposite rail 32, and has a support wheel 32 attached to a tip end thereof, It can be constituted by wheels 35, 36 attached before and after.

Displacement detectors 11, 12, and 13 constituting the input means 10 are provided at the front, rear, and center of the frame 31. The displacement detectors 11, 12, and 13 are, for example, a linear displacement detector of a differential transformer type, and a guide roller that moves the end of the movable rod of the linear displacement detector by pressing the end of the movable rod against the rail surface of the rail to be measured. The guide roller can be constituted by a spring for elastically pressing against the rail surface of the rail to be measured.

These three displacement detectors 11, 12, 13
Are A, B, and A with respect to the measured rail 30 as shown in FIG.
Touch the point C and find the value of the right arrow at the point B by the threaded crossing method. Assuming that the displacement measurement values of the respective displacement detectors 11, 12, and 13 are a, b, and c, the inspection value at point B (the right arrow value)
To obtain _Vb , _Vb = b- (a + c) / 2.

This operation is performed by the arithmetic processing unit 20 shown in FIG.
It is performed in. The measurement signals from the respective displacement detectors 11, 12, and 13 are amplified by an amplifier 15 as shown in FIG. Any one of the measurement signals of each of the displacement detectors 11, 12, and 13 sampled and held by each sample and hold circuit 16 is selected by a multiplexer 17, and the selected sample and hold value is input to an AD converter 18 and AD The data is converted and input to the arithmetic processing unit 20.

The input means 10 includes displacement detectors 11, 12,.
A distance measurement signal transmitter 14 is provided outside the device 13. In the distance measuring signal transmitter 14, a roller provided at the center of the frame 31 is rolled into contact with the head surface of the rail 30 to be measured, and the turntable is rotated with the progress of the inspection car, and the transparent plate formed on the periphery of the turntable is rotated. It can be constituted by a structure in which a pulse signal is transmitted by intermittently supplying light to the optical switch through the hole. With this structure, the inspection vehicle can be kept at a fixed distance, for example, 1 m.
The pulse can be output one by one from the ranging signal transmitter 14 every time the motor moves by m. The pulse output from the ranging signal transmitter 14 is input to the arithmetic processing unit 20 to accumulate the traveling distance of the inspection vehicle and to perform processing for specifying each inspection point. For example, in order to take a measuring point every 0.625 meters as in the simple orbit actual shape measuring device proposed in Japanese Patent Application No. 61-246968, it is necessary to perform a process of detecting a true arrow every time 625 pulses are counted. Good. Input means 10
Is also provided with a keyboard 19, and a desired operation can be input from the keyboard 19.

When the yaw value is measured by hand, a yaw value data string is input from the keyboard 19. The arithmetic processing unit 20 can be constituted by, for example, a microcomputer. As is well known, the microcomputer 20 includes a central processing unit 21 called a CPU.
, A ROM 22 for storing programs and the like, a RAM 23 for temporarily storing fetched data and the like, and an input port 2
4, the output port 25 and the like.

According to the present invention, a real linear conversion means for converting the amount of trajectory deviation inputted from the input means 10 into a real linear by the arithmetic processing unit 20, and each of the inspections converted to a real linear by the real linear conversion means. Storage means for sorting and storing the actual linear data string of the trajectory at the point according to the number of measurements; reading means for reading the actual linear data string of the trajectory at each inspection point for each number of measurements stored in the storage means; Comparing means for comparing the actual linear quantity for each of the measurement points read by the reading means for each number of measurements, and determining means for determining whether or not the comparison result compared by the comparing means is within a predetermined range And

The real linear conversion means can be constituted by a real linear conversion program written in the ROM 22, for example. Therefore, the storage area of the real linear conversion program is denoted by reference numeral 22A, and the portion denoted by reference numeral 22A is referred to as real linear conversion means 22A. Real linear conversion means 22
The real linear transformation program constituting A is, for example, “Japanese Patent Application No. 62-133809: Simple name and orbit actual shape measuring device” or “Japanese Patent Application No. 63-24” already proposed by the present applicant.
No. 8837: Name, orbital real linear conversion method ".

For a method of converting a sequence of positive values detected by the threading type crossing method into a real linear data sequence, refer to the specifications of these prior applications. In the present invention, the real linear data sequence converted from the true value data sequence to the real linear by the real linear conversion means 22A is sorted and stored according to the number of times of inspection, and the real linear data sequence obtained from the first inspection result is stored. 2. The actual linear data sequence obtained from the second inspection result is compared with each of the inspection points for each inspection point, and the inspection point whose comparison result exceeds the allowable value is detected, and the inspection point exceeding the allowable value is detected. Is displayed on the display unit 40, and re-measurement of the measurement point is encouraged.

For this reason, in the ROM 22, in addition to the actual linear conversion means 22A, a program constituting means for sorting from the storage means and reading out from the storage means, a program constituting comparison means, and the comparison result being within an allowable range. Areas 22B and 22C for storing programs for determining whether to enter
22D is provided. Therefore, these areas 22B, 22C,
22D will be referred to as reading means, comparing means, and determining means.

The storage means is the RAM 23 or the external storage device 5
0. 2 and 3
Is run along the test rail 30 to perform the first test. The inspection vehicle is at a predetermined distance, for example, 0.
Every time the vehicle travels for 625 meters, a positive arrow value is measured. The first-time arrow value inspection data sequence is taken into the RAM 23 in accordance with the order of each inspection point. The first yaw value inspection data sequence taken into the RAM 23 is converted into a real linear data sequence by the real linear conversion means 22A. This real linear data string is written into the external storage device 50 as necessary.

Next, the second time arrow data is read from the input means 10 into the RAM 23. The second straight arrow data sequence is converted into a real linear data sequence by the real linear conversion means 22A. After converting the second yaw value inspection data string into a real linear data string, the reading means 22B reads the first real linear data string from the external storage device 50, for example, and outputs the data to the comparison means 22C for each inspection point. To compare the first and second real linear data.

As a result of the comparison, when the difference between the actual linear data at each inspection point falls within the range of the allowable value, the judgment means 22
D indicates that all the inspection data is correct, and the real linear data sequence obtained in the first measurement or the real linear data sequence obtained in the second measurement is stored in the external storage as normal inspection data. 5
In addition to writing to 0, data is output to the printer 60 as necessary.

A difference occurs between the actual linear data sequence obtained by the first measurement and the real linear data sequence obtained by the second measurement at any of the measurement points. Is exceeded, the determination means 22D displays the inspection point on the display 40, and also causes the printer 60 to perform printing if necessary. When the inspection point at which a large error is detected is displayed, the operator performs inspection of the inspection point and the inspection points before and after the inspection point within a predetermined range. The right arrow data and the first or second right arrow data obtained by this inspection are combined according to the order of the inspection points, and edited into one right arrow data. This right arrow inspection data sequence is used as the right arrow inspection data sequence obtained by the third inspection. The 3rd time Yaya value inspection data sequence was converted to a real linear data sequence,
The second real linear data sequence is compared for each inspection point. As a result of this comparison, if all the inspection points fall within the allowable values, then 1
The real linear data sequence 12 obtained by the third or third measurement is written to the external storage device 50 as regular data.

If a detection point that does not fall within the allowable range is detected, the detection point number is displayed on the display 40 and printed by the printer 60. When an inspection point number that does not fall within the allowable value is detected, the operator runs the inspection vehicle again at the displayed inspection point and before and after the inspection point, and executes the fourth right arrow inspection at the defective inspection point. I do. The fourth arrow measurement data and, for example, the first or second arrow measurement data sequence are combined to obtain a full arrow measurement data sequence for all the measured steps. This right arrow data line is referred to as the fourth right arrow data line.

When the fourth measurement data of the right arrow value is obtained,
The data is converted into a real linear data sequence by the real linear conversion means 22A.
This data sequence is defined as a real linear data sequence obtained by the fourth measurement. The real linear data sequence obtained by the fourth measurement is compared with the real linear data obtained by the first, second, and third measurement. If the actual linear data at any number of times and all the measurement points fall within the permissible range by this comparison, the real linear data sequence obtained by the fourth measurement or the real linear data sequence of the comparison partner is converted to the normal real linear data. The data is written to the external storage device 50 as a data string. At the same time, it is possible to cause the printer 60 to print regular real linear data as needed.

If the comparison result does not fall within the allowable range even after the fourth measurement, the fifth measurement is performed and the same processing is performed. Thereafter, this operation is repeated until the comparison result falls within the allowable value. FIG. 7 shows a schematic configuration of a program for operating the arithmetic processing unit 20. In the step, the first inspection is performed, and the inspection data sequence is converted into a real linear data sequence A. The second inspection is performed in the step. The inspection data sequence is converted into a real linear data sequence B. In the step, the real linear data sequence A obtained by the first measurement and the real linear data sequence B obtained by the second measurement are compared. The determination is made in steps. If the difference between A and B falls within the allowable value at all the inspection points, writing is performed in the external storage device 50 in a step, and the process ends.

As a result of the judgment, if a detection point that does not fall within the allowable value is detected, the defective detection point is displayed in step. In the step, the inspection data is obtained again from the defective inspection point. This inspection data is combined with the first or second inspection data, edited into a series of inspection data strings, and converted into a real linear data string. After the conversion, return to the step and compare the first real linear data sequence and the second real linear data sequence, and determine the comparison result in the step. If the value is within the permissible value, writing is performed in steps and the process is terminated. If a test point that does not fall within the allowable value in any of the comparison results with the real linear data sequence is detected, the test point is displayed and step
Is repeated.

[0031]

As described above, according to the present invention, the straight arrow inspection data sequence detected by the threading type crossing method is converted into the real linear data sequence by the real linear conversion means 22A, and this operation is performed at least two times. The actual linear data sequence obtained by the two inspections is compared for each inspection point, and it is confirmed that all the comparison results fall within the allowable values. Because of the configuration, the reliability of this real linear data sequence is high. Therefore, there is an advantage that the real linear data train can be used immediately at the site and the orbit adjustment work can be performed efficiently.

In the above-described embodiment, the real linear conversion means, the reading means, the comparing means, and the judging means are configured to be stored in the ROM 22. However, as another method, a program for previously configuring each of these means in the external storage device 50 is used. May be prepared, and the program may be read into the RAM 23 and executed. In addition, the inspection vehicle may have a structure in which a displacement detector is provided only in the center of the frame 31 and guide rollers are attached to the front and rear.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention.

FIG. 2 is a plan view showing an example of an inspection vehicle used in the embodiment of the present invention.

FIG. 3 is a side view of FIG. 2;

FIG. 4 is a view for explaining an inspection method of the inspection vehicle shown in FIGS. 2 and 3;

FIG. 5 is a diagram showing an example of a yaw value data sequence.

FIG. 6 is a diagram showing an example in which the arrow value data sequence shown in FIG. 5 is converted into a real linear data sequence.

FIG. 7 is a flowchart for explaining the operation of the main part of the track inspection device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Input means 20 Arithmetic processing unit 22A Real linear conversion means 22B Reading means 22C Comparison means 22D Judgment means

Continuation of the front page (58) Fields investigated (Int. Cl. ⁷ , DB name) G01B 21/00-21/32 B61K 1/00-13/04 E01B 27/00-37/00

Claims (1)

(57) [Claims] 1. A. First Embodiment B. input means for sequentially inputting the deviation amount of the trajectory detected by the thread tension type crossing method as a yaw value data sequence; B. real-linear conversion means for converting the yaw value data sequence input from the input means into a real linear data sequence; D. storage means for sorting and storing the actual linear data sequence of the trajectory at each inspection point converted into the actual linear form by the actual linear transformation means according to the number of times of measurement; E. reading means for reading a real linear data string of the trajectory at each inspection point for each number of measurements stored in the storage means; B. comparing means for comparing the actual linear data at each inspection point for each number of inspections read by the reading means; G. determining means for determining whether or not the comparison result compared by the comparing means is within a predetermined range; When the determination means detects that the comparison result is out of the predetermined range, a track display device configured to display the inspection point is provided.