JPH0445603B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for recording measurement data measured by a track inspection vehicle.

[Conventional technology] Track inspection vehicles that inspect the condition of railway tracks include large-scale vehicles that travel at high speeds over long distances, and those that travel at low speeds over short sections such as rural railway sections. There is a simple type that performs inspection, and the former has already been automated using electronic technology. On the other hand, even in the latter type of simple type, the displacement sensors and recording devices used have recently been changed from conventional mechanical types to electronic types, improving measurement accuracy and speed. At the same time, in order to decipher and manage the inspection data, in addition to directly reading the records on chart paper onboard the vehicle, methods are being advanced in which the inspection data is recorded on magnetic tape and then processed by computer on the ground. There is.

Now, when recording data obtained through inspection, it is essential to include the point where the data was generated, that is, the length of the track. For this reason, conventionally, a pulse generator directly connected to the axle generates pulses at fixed distance intervals (hereinafter referred to as distance pulses), and these pulses are counted to calculate the distance traveled, and a distance mark or distance value is used. The measurement data is recorded on chart paper or on magnetic tape.

Figure 4 is a block diagram showing the outline of a conventional inspection system using a microcomputer for a simple inspection vehicle.The inspection data output from the track inspection device 1 is output from the distance pulse generator 2. It is input to the microcomputer 4 via the interface 3 together with the output distance pulse. The microcomputer 4 performs predetermined processing of the measurement data and adds necessary items.
At the same time, the travel distance is obtained by integrating the distance pulses, and these are recorded or recorded on chart paper or magnetic tape, respectively.

In order to use the measurement data recorded on the magnetic tape described above, it is necessary to edit it for each section in charge of the track maintenance department. This section will hereinafter be referred to as an edit section. Additionally, there are sections of the track that do not require inspection, and these sections are hereinafter referred to as excluded sections. These edited sections and excluded sections are checked by a computer against their respective actual lengths and running lengths, and depending on the match, are edited or excluded. In addition, at the measurement start point, branch point, or turning point of the track, the actual distance is set in the distance counter according to the comparison between the previous actual distance and the travel distance. These will be explained below using figures.

In Figure 5a, 9 is a railway line, 9a, 9b,
9c and 9d show examples of editing sections, with points A,
B, H, and D are boundary points. In the figure, if the measurement is performed in the direction of the arrow, point A indicates section 9a.
When the measurement of section 9b is completed and the next section 9b is started, the measurement data of section 9a is edited. Section 9
9b' in b is an exclusion section, and the measurement data during this period is excluded from editing. Next, the track branches at point RO, and when the inspection progresses in the direction of section 9c, it is the same as the case at point A, but when it goes in the direction of branch line 9d, the starting point is point RO. Since the distance is changed to (0), it is necessary to reset the distance counter at an appropriate position near the point RO.

FIG. 5b shows a double-track section 10, and point E is a boundary point of the edited section and a branch point of a crossover line 11 to the track in the opposite direction. Now, if the inspection is performed back in the direction of the arrow, up line 1
After completing 0a, the inspection vehicle moves to the down track 10b via the crossover track 11. The crossover line 11 is an excluded section, and the down line 10b starts from the measurement starting point. Here, since the distance between points E and H is different, it is necessary to correct or set the distance counter. It should be noted that in the up and down directions, it is necessary to add the counters in the opposite manner, that is, to add in one direction and to subtract in the other direction.

[Problems to be solved] The above-mentioned transfer of measurements at boundary points of editing sections, editing of measurement data for each editing section, removal of data in excluded sections, and transfer of inspection at branching or turning points, etc. Traditionally, the start and duration settings are
The inspector visually checks the distance indicator 7 in Fig. 4 and presses the operation button 8 every time it reaches a predetermined value.
It was a manual process in which the necessary information was entered into a microcomputer by operating a computer. However, since there are a large number of locations where such operations are required, and the operations must be accurate and quick, manual operation has reached its limit, and there has been a desire to automate this process.

[Object of the Invention] An object of the present invention is to solve the above-mentioned problem in a simple inspection vehicle, that is, to automate the manual operation of the operation buttons required for inspection and editing. However, this automation cannot be achieved solely through software processing by a computer. For this purpose, it is necessary to accurately maintain the value of the distance counter that is accumulated from the distance pulse. This is of course desirable even in a manual system, but the speed is also low, and even if there is an error in the distance counter, the problem can be solved by stopping the machine or other expedient methods, but if it is automated, the speed will improve. Therefore, it goes without saying that accurate measurements are necessary.

Here, regarding the accuracy of distance pulses, the basic wheel rotation speed is affected by wear of the wheel diameter over time, and wheel slippage at curved sections, etc., which causes irregularities in pulse intervals. Therefore, the distance traveled indicated by the distance counter is inaccurate.

Next, as described above, since the starting point is changed at a branching point or turning point, it is necessary to newly set the distance.

The purpose of this invention is to solve the above-mentioned section-by-section editing problems, create an automated system, and provide a track inspection data recording method that enables high-speed inspection. be.

[Means for solving the problems] The characteristics of the trajectory inspection data collection method of the present invention are as follows.
Place the starting point detection plate common to the distance correction detection plate at a distance that exceeds the maximum measurement error of the distance counter at a certain interval between the distance correction detection plates and at branch points of railway lines, turning points of multiple sections, and other points. A storage device is provided on the track corresponding to the measurement start point such as , and stores the actual distance on the track on which the start point detection plate is installed, and a detection plate detects the distance correction detection plate. The starting point detection plate is detected by the device in the same way as the distance correction detection plate, and the track inspection device performs a certain test determined by comparing the travel distance indicated by the distance counter with the distance stored in the storage device. Regarding the starting point of measurement, the actual distance of the starting point detecting plate is read out from the storage device in response to a detection signal from the detecting plate detector of the starting point detecting plate and set in the distance counter.

[Operation] In the present invention, the distance correction detection plate and the starting point detection plate are provided as a common plate, and are detected by the same detector. In this case, it is necessary to identify the distance correction detection plate and the starting point detection plate. In order to make this distinction, the signal from the start point detection plate and the signal from the distance correction detection plate are distinguished based on where in the running distance the detection signal is generated. Therefore, first, in order to make the travel distance indicated by the distance counter, which is a distance counter, accurate, the distance is corrected using a point signal. That is,
Distance correction detection plates are installed at appropriate intervals (for example, 500 m) on the track, and the distance correction signals that are sequentially detected by the detection plate detector installed on the inspection vehicle while the vehicle is running are input into the computer. This is to correct the error of the distance counter using software.

In this case, the point detection method may be either optical or electromagnetic.

Next, in this invention, the means for setting the distance value on the distance counter is set at branch points of the track, turning points of double-track sections, and other points (hereinafter, for convenience, these points are referred to as measurement starting points). ) is provided with a starting point detection plate, which is detected by the above-described point detector on the vehicle, and the detection signal is input to the microcomputer. The microcomputer uses the detection signal to set actual distances at those points, which are stored in advance in a storage device, in a distance counter.

Now, as mentioned above, the detection plate detector on the inspection car is used in common for the distance correction detection plate and the inspection start point detection plate installed on the track, so the detection signal for both of them is It is necessary to identify the Therefore, the inventor of the present invention investigated and studied the actual situation regarding the error of the distance counter, and obtained the following results. In other words, this error is usually within a few meters at most for an actual distance of 500 meters, so if the starting point detection plate is installed at a distance of about 20 meters from the correction detection plate, for example, By comparing the actual distance traveled with the traveling distance, the actual distance can be obtained for the branching point, turnaround point, and other points of the track that are the starting points of the inspection. It becomes possible to reliably identify the two. As described above, a major feature of the present invention is that a common detection plate detector is used for both, and that both signals are discriminated by software processing by a microcomputer.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings.

Figure 1 is a block diagram of the main equipment in the track inspection data recording method according to the present invention.
14 is a measurement starting point such as a boundary point of an edited section, a branch point of a track, a turning point of a double track section, or other points;
The numbers of the start and end points of the excluded section and the respective actual distance values are stored in advance.

12 is an optical reflector provided on the track; 13
is an optical detector installed on the inspection vehicle opposite to this. FIG. 2 a corresponds to FIG. 5 a,
This is to explain the arrangement of the optical reflectors 12 in this invention, and distance correction reflectors 12a are installed every 500M from the line starting point. Furthermore, although the measurement starting point reflection plate 12b is not provided at a general boundary point, in this case, point A is provided as the measurement starting point. For section 9d of the branch line, a starting point reflector 12b is provided at an appropriate position near branch point RO as one of the inspection starting points. Here, for the above-mentioned reason, the reflector 12b is separated from the reflector 12a.
They must be separated by at least 20 meters, and for this purpose, the measurement starting point must be selected to meet this condition.

Figure 2b corresponds to the double track section in Figure 5b, and the reflector 12a is installed every 500M as above.
It is installed on both the up and down lines. Further, a reflection plate 12b is installed at the turning point. Second
Similar to Figure a, the reflector 12b is connected to the reflector 12a.
Must be separated by at least 20 meters.

FIG. 3 is a flowchart showing a processing procedure for recording trajectory measurement data by the microcomputer 4 of the present invention, which will be explained below using FIG. 1 and FIGS. 2a and 2b together.

In FIG. 3, it is assumed that the microcomputer 4 has started to be used, initial settings have been made, and the inspection vehicle is running. During this time, distance pulses are input every fixed distance (20) and the distance is counted by the distance counter to calculate the distance traveled (21) and displayed on the distance display 7. Note that this display 7 is displayed in meters, and it goes without saying that it is updated sequentially as the vehicle travels.

It is now assumed that the measurement starts from section 9b in FIG. 2a. First, section 9 before point A
The value of the distance counter is corrected by detecting the distance correction reflector 12a at the final position of a. Next, the measurement start switch is turned on. With this input,
Next, when the measurement start point reflector 12b at point A is detected by the optical detector 13, the inspection start point signal obtained by the detection of the start point reflector 12b installed at point A is The signal is input to the computer 4 (18), and based on this signal, the numerical value of the actual distance to point A stored in the ROM 14 is read out according to the travel distance indicated by the distance counter and is set in the distance counter (19). ).

Next, when the inspection vehicle comes to the position of the distance correction reflector 12a, a distance correction signal is input (22), so that the traveling distance value becomes an integral multiple of 500M corresponding to that position. Then, the fractions are rounded up or down to be corrected (23). In this way, since the travel distance on the counter is made to match the actual distance every 500 meters, there is no accumulation of errors even when measurements are made over long distances, and the error is kept within a few meters at most.

Next, regarding the measurement data, the data continuously obtained during the run is written on the magnetic tape 6 along with the value of the distance traveled on the counter (28). Now, when the travel distance matches the actual distance at the start point of the excluded section 9b' stored in the ROM (24), data removal to the magnetic tape is started (25), and then the excluded section is When the end point of 9b' is reached (26), the removal is completed (27) and the writing routine (28) is entered again.

Now, as the measurement progresses, the microcomputer 4 compares the running distance with the actual distance in the ROM 14.
When the traveling distance matches the actual distance of the boundary point B of the editing section stored in the ROM (29), the measurement data editing routine 30 is entered, and editing is performed for the editing section 9b. After this, unless the entire section has been measured (33), the routine returns to (20) and repeats the same steps as described above. In addition, when the inspection vehicle comes to the turning point RO or the turning point HO, it will check the distance and return from (31), (32) to (18) and wait for the inspection start point signal. . I have already mentioned what happens after this.

As mentioned above, in microcomputer 4,
When reaching the measurement start point such as branch point RO, the distance is compared, in other words, the value of the distance counter and the ROM are checked.
The measurement starting point is selected by comparing it with the actual distance in ROM 14, and by obtaining the detection signal for that measurement starting point, the actual distance at that point stored in the ROM 14 is displayed in the distance counter. It is set. Steps (31) and (32) in FIG. 3 are stages of the above-mentioned process verification process by the microcomputer 4, and are stored in the ROM 14 in correspondence with the measurement starting point selected in this verification process. In the next step (18), the actual distance measured is received as a measurement start point signal (detection signal of the start point reflector 12b), and in accordance with the measurement start point signal (detection signal of the start point reflector 12b) is sent to the distance counter in step (19). The actual distance on the track is set. In this case, since the microcomputer 4 performs distance matching matching processing, the distance counter is It is necessary to install the starting point reflector 12b a distance beyond the maximum measurement error of .
Note that there are cases where a detection signal from the starting point reflector 12b is received at the testing starting point and the actual length is read out from the ROM 4 in response to the detection signal, such as the testing starting point A in the case of starting the testing.

By the way, as stated at the beginning, the numerical value of the distance of the track increases or decreases depending on the direction of travel of the inspection vehicle, so the operation of the distance counter must be adjusted accordingly. In this invention, information on the traveling direction (upward or downward) is inputted into the microcomputer 4 using the operation button shown at 8 in FIG. 1 (35). However, it is of course possible to automate the switching of the traveling direction by providing the inspection vehicle with an appropriate sensor for detecting its traveling direction and inputting its output signal to a microcomputer.

In the above description, since the microcomputer 4 performs distance verification, editing of measurement data, etc. using ordinary computer technology, it will not be described here.

[Effects of the Invention] As can be understood from the above explanation, in the track inspection data recording method according to the present invention, the error that occurs in the travel distance obtained by counting distance pulses is set for every fixed distance (500M). The error in the travel distance can be made extremely small by correcting the travel distance by using a correction signal obtained by detecting the distance correction reflector with a detector on the inspection vehicle. In addition, at the inspection start point, branch point, or turning point, the inspection start point reflector installed at that position is detected by the same detector as above, and the obtained inspection start signal is stored in the ROM in advance. The actual distance measured at that point is set in the distance counter, which allows the correct distance to be recorded on the magnetic tape along with the measurement data.

As mentioned above, the travel distance indicated by the travel distance counter is corrected every 500M, and the error is extremely small. A major feature of this invention is that by selecting the starting point so that it is larger than the maximum value of the error occurring in This is extremely effective for simple inspection vehicles.

Next, regarding the editing of the measurement data, by matching the travel distance with the distance of the edited section stored in the ROM, the measurement data is edited for each edited section and the next section is edited. It is a matter of transition,
Setting the distance at the starting point and switching between editing sections, which were previously done manually, are all automated, making it possible to record measurement data accurately and efficiently. It is highly effective, with improvements being measured.

[Brief explanation of the drawing]

FIG. 1 is a block configuration diagram of the orbit inspection data recording method according to the present invention, FIGS. 2a and 2b are diagrams showing the installation positions of the optical reflectors in FIG. 1,
FIG. 3 is a flowchart outlining the processing procedure by the microcomputer in FIG.
Figure 4 is a block diagram of the track inspection data recording method in a conventional simple track inspection vehicle, and Figure 5a.
5 is a diagram showing edited sections of inspection data, their boundary points, removed sections, and branch lines, and FIG. 5b is a diagram showing crossover lines and inspection start points in double track sections. 1... Orbit detection device, 2... Distance pulse generator, 3
...Interface, 4...Microcomputer,
5...chart recorder, 6...magnetic tape device, 7...
Length indicator, 8...operation button, 9...railway, 9a,
9b, 9c, 9d...editing section, 9b'...exclusion section,
DESCRIPTION OF SYMBOLS 10... Double track section, 10a... Up line, 10b... Down line, 11... Crossover line, 12... Optical reflector, 12a...
Distance correction reflector, 12b...Inspection starting point reflector, 1
3...Optical detector, 14...ROM, A, B, C,
D... Boundary point of editing section, H... Track junction, H...
Measurement starting point.

Claims (1)

[Claims] 1. On the track inspection car, there is a track inspection device, a distance pulse generator that generates distance pulses at fixed distance intervals according to the rotation of the axle, a distance counter, and a distance measurement device on the track from the starting point of the distance of the track. distance correction detection plates arranged at regular intervals, edits the measurement data obtained by the track measuring device, counts the distance pulses by the distance counter, and calculates the travel distance; In the track inspection data recording method, the distance is corrected by detecting the distance correction detection plate, and the measurement data and the distance traveled are recorded together in an external storage device. A starting point detection plate common to the distance correction detection plate is placed at a branch point of a track, a turning point of multiple sections, or any other point, separated by a distance exceeding the maximum measurement error of the distance counter at a fixed interval of the correction detection plate. A storage device is provided on the track corresponding to a measurement start point such as , and stores an actual distance on the track on which the start point detection plate is installed, and detects the distance correction detection plate. The detection plate detector detects the starting point detection plate in the same way as the distance correction detection plate, and the trajectory inspection device compares the running distance indicated by the distance counter with the distance stored in the storage device. With respect to the certain measurement start point determined by the above, the actual distance of the start point detection plate is read out from the storage device according to a detection signal from the detection plate detector of the start point detection plate, and the distance counter is read out from the storage device. A track inspection data collection method characterized by setting.