JPH1137728A - Method and device for measuring amount of longitudinal movement of rail - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically measure and manage a stroke amount and a creeping amount at a rail joint as well as a creeping amount in a rail immobile section. SOLUTION: A reference plate specified length, which is for reflecting such a ray as a laser beam and is fixed at measurement reference position of a rail 1 and that on a track, an optical sensor 17 such as a laser sensor, which is mounted on a measurement car 8 running on the rail 1, and a calculation process device 18 which, mounted on the measurement car 8, receives the reflection light of such ray as laser beam and processes data, constitute a longitudinal movement amount measuring device for the rail 1. With the use of the device, the stroke amount and the creeping amount of the rail 1 can be measured automatically from the measurement car 8 running on the rail 8, resulting in less man power and more efficient and accurate measurement.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention measures the vertical movement of a rail, which is the amount of expansion and contraction in the length direction of the rail, and automatically measures the deviation and the presence or absence of a margin for the stroke of the rail expansion and contraction joint. Device and method that can be used.

[0002]

2. Description of the Related Art Normally, rails laid on railway tracks are:
It is accompanied by expansion and contraction in the length direction due to temperature change. The expansion and contraction in the length direction due to this temperature change is called rail longitudinal movement. The vertical movement of the rail occurs only within a predetermined length from both ends of one rail toward the middle of the rail. In the central portion of the remaining rails, resistance of the roadbed and the like is received, so that the expansion and contraction operation is hindered, and the expansion and contraction of the rails due to temperature changes do not occur. That is, no vertical movement of the rail occurs in the central portion of the rail, and this portion is called an immobile section. on the other hand,
Within the range of the predetermined length on both ends of the rail, as described above, the rail expands and contracts due to temperature changes, and it is necessary to take measures against this.

For this reason, at both ends of the rail, a tongue rail is provided and a joint is formed so as to be able to expand and contract with the tongue rail, so that the expansion and contraction behavior of the rail does not affect the running of the train. . However, the expansion and contraction behavior of the rail at both ends of the rail is allowed within a certain stroke. They could go in and out, causing derailment. The tong rail is fixed to the roadbed with a rail fastening device so that it does not move, but it is possible that the whole tong rail may move for some reason. It is also necessary to monitor the overall behavior.

Further, even in an immovable section where the rail does not naturally expand or contract, the rail may move for some reason and deviate from the reference position. Such a deviation is called “fu-jin”. The bulging is the result of some axial force acting on the rail. If it exceeds a certain amount, buckling of the rail is accompanied and the train may derail.

For this reason, conventionally, an operator periodically measures the stroke amount and the swaging amount at both ends of the rail and the swaging amount in the immobile section in the manner shown in FIGS. I was watching. FIG. 6 shows a case where the stroke amount and the extension amount of both ends of the rail 1 are measured, and FIG. 7 shows a case where the extension amount in the rail immobile section is measured.

As shown in FIG. 6, the joint at both ends of the rail 1 is a movable side with both ends of the rail 1 being free ends, and the tong rail 2a and the tongue rail 2a fixed between the rails 1 by a rail fastening device. 2b is provided. Before measuring the stroke amount and the bulging amount, the left and right tong rails 2a
At the both ends between the reference piles 2a and 2b, reference piles 3a and 3b indicating a reference position are fixedly erected on a track bed that does not move, and V-notches are stamped on the top surfaces of the reference piles 3a and 3b. And the water thread 4 is stretched between the V notches,
A punch mark 5 is stamped on the tongue rail 2a at a position overlapping with the water thread 4, and a punch mark 6 is stamped on each rail at the joint between the tip of the tongue rails 2a and 2b and both ends of the rail 1. I have.

[0007] The measurement of the stroke amount and the advance amount is performed manually by an operator who goes to the site. First, a water thread 4 is stretched between the V notches on the top surfaces of the reference piles 3a and 3b, and the amount of displacement of the punch mark 5 with respect to the water thread 4 is measured with a ruler or the like, thereby tong rails 2a and 2b.
The amount of fluting is measured. Further, the stroke amount is measured by measuring the amount of displacement between the punch marks 6 at both ends of the rail 1 and the tip of the tongue rail 2a or 2b using a ruler or the like.

[0008] The measurement of the bulging amount in the immobile section of the rail 1 is performed in the same manner as in the case of the tong rails 2a and 2b. That is, as shown in FIG.
The reference stakes 3a and 3b are fixedly erected on a roadbed that does not move at a position on the track corresponding to the illuminated point, and V notches are stamped on the top surfaces of the piles 3a and 3b. A water thread 4 is stretched between the V notches, and a punch mark 7 is stamped on the rail 1 at a position overlapping the water thread 4. The amount of bulging is measured by measuring, using a ruler or the like, the amount of deviation between the water thread 4 stretched between the V notches of the reference piles 3a and 3b and the punch mark 7. Note that these measured data are compared with past measured data, and if the deviation exceeds an allowable range, safety measures such as changing rail settings are taken.

[0009]

However, since the measurement of the stroke amount and the bulging amount of the rail including the tong rail must be performed at intervals of, for example, 500 m, for example, the measurement is performed on the Sanyo Main Line or the Sanyo Shinkansen. Even in one line section, the number of measurement points becomes enormous, and the measurement cycle is short, once every two to three months. In addition, since the water thread 4 is stretched between the V notches of the reference piles 3a and 3b in the measurement at the illuminated point, the water thread 4 is affected by wind and rain.
Has a drawback which causes a measurement error. In addition, the measurement depends on manual labor, which places a heavy burden on workers, requires two workers to stretch the water thread 4, and requires another person to measure with a ruler. People were needed.

[0010]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention has been improved and eliminated from the above-mentioned problems. In this invention, the stroke amount and extension amount at a rail joint and the extension amount at a rail immobile section are automatically determined. It is an object of the present invention to provide a device and a measuring method capable of performing measurement and management in a targeted manner.

According to the first aspect of the present invention, there is provided an apparatus for measuring a vertical movement amount of a rail, comprising: a measurement reference position of the rail; A reference plate for light reflection having a predetermined length fixed at a measurement reference position, an optical sensor mounted on a measurement vehicle running on rails, and processing of data by receiving reflected light of a light beam mounted on the measurement vehicle An apparatus for measuring the vertical movement of a rail, comprising: an arithmetic processing device for performing an arithmetic operation. By using this device, the stroke amount and the bulging amount of the rail can be automatically measured from the measurement vehicle traveling on the rail, so that labor saving can be achieved, and efficient and high-precision measurement is possible.

According to a second aspect of the present invention, there is provided a light-reflecting reference plate set at a predetermined length at a measurement reference position on a rail or a track, and the light-reflecting reference plate is set when passing through each reference plate. The speed of the measuring vehicle is calculated from the length of the reference plate and the passing time, and the average value of the passing speeds of the two reference plates is obtained as the average speed of the measuring vehicle.The average speed of the measuring vehicle and the passing time between the two reference plates Calculating a distance between two measurement reference positions from the reference position and comparing the distance with a preset reference length to measure the vertical movement amount of the rail. It is. In this way, by simply using the light beam to receive the reflected light from the reference plate and processing it,
The stroke amount and the extension amount of the rail can be measured, and there is no influence from wind and rain. That is, accurate measurement can be performed.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below with reference to the embodiments of the invention shown in the drawings. The same reference numerals as those in the conventional case denote the same members. 1 to 5 relate to a first embodiment of the present invention. FIG. 1 (A) is a side view showing a measuring cart 8, and FIG. 1 (B) is a front view thereof. FIG. 2 is a block diagram showing the overall configuration of the present apparatus, and FIG. 3A is a diagram showing reference plates 9 and 10A for measuring the amount of advance in the immobile section of the rail 1.
It is a top view which shows the installation position of 10B, and figure (B) is the same longitudinal cross-sectional view. FIG. 4 shows reference plates 11A and 11B, 12A and 12B, 13, 14A and 14B,
It is a top view which shows the installation position of 15A and 15B. FIG.
4A is a partially enlarged view of FIG. 4, and FIG. 4B is a waveform diagram showing a reception output signal of the light beam.

As shown in FIG. 1, in the present embodiment, a reference pile 16 is installed on a fixed roadbed at a stamped point in a rail immovable section or a railroad line at a rail joint. Reference plates 9 and 13 having a predetermined width and a predetermined length are installed horizontally on reference pile 16. The reference plates 10A, 10B to 15A, 15B having a predetermined width and a predetermined length are also provided on the inner side surfaces of the left and right rails 1, 1. These reference plates 9 to 15A and 15B are formed of a material such as a resin, a steel plate or the like, which can reflect a light beam such as a laser beam and has weather resistance.

The reference plates 9 and 13 attached to the reference pile 16 and the reference plates 10A and 10B to 15A and 15A attached to the inside of the left and right rails 1 and 1, respectively.
On the lower surface side of the measurement vehicle 8 corresponding to the position B, three optical sensors 17, 17A and 17B such as laser sensors are provided as shown in FIGS. . The signals of the optical sensors 17, 17A and 17B are processed by a processing unit 18 shown in the block diagram of FIG.

That is, the optical sensors 17, 17A and 1
The received output signal from 7B is compared with a predetermined reference threshold by the waveform classifier 19 to remove noise components. The separated signal is sent to the time measuring unit 20, and the time interval during which the received signal equal to or larger than the threshold is output is measured. Then, the arithmetic processing unit 21 calculates the distance between the reference plates from the time interval and the length of each reference plate, and outputs the distance to the displacement amount calculation unit 22 and the data recording unit 23. The displacement calculating unit 22 compares the distance between the reference plates obtained this time with the previous distance data, and outputs the displacement 24. If the displacement 24 is equal to or more than a predetermined value, it is necessary to change the setting of the rail.

Next, FIGS. 4A and 4B and FIGS.
24, the displacement amount of the left rail with respect to the traveling direction
The calculation method of will be described. When the measuring vehicle 8 reaches the reference stake 16 at the rail joint, the light beam emitted from the optical sensor 17 strikes the reference plate 13 of the reference stake 16 and is reflected and received by the sensor 17. The output signal is as shown in FIG. When the measuring vehicle 8 passes through the reference plates 14A and 15A attached inside the tong rail 2b and the rail 1 at the joint, the optical sensor 17A
Receives the reflected light, and its waveform is as shown in FIG. 5B. Then, the time during which these waveforms are output and the time interval between these waveforms are measured.

Assuming that the time during which the light reflected from the reference plate 13 of the reference pile 16 is received is T1, the reference plate 13
Since the length L1 is predetermined and known, L1 / L1
From T1, it is possible to know the speed when the measuring vehicle 8 has passed the reference plate 13. When the time during which the light reflected from the reference plate 14A is received is T2, and the length of the reference plate 14A is L2, the speed of the measuring vehicle 8 when passing through the reference plate 14A is calculated from L2 / T2. can do.

Assuming that a time interval between the light beams reflected by the reference plate 13 and the reference plate 14A is received is t1, the distance X between the reference plate 13 and the reference plate 14A is measured. It can be easily obtained by multiplying the average speed when the vehicle 8 passes through both the reference plates 13 and 14A by t1. This distance X is the extension amount of the tong rails 2a and 2b. The operation of X is

[0020]

(Equation 1)

The speed of the vehicle 8 when passing through the reference plate 15A is represented by L3 / T3, where T3 is the time during which the light reflected from the reference plate 15A is received, and L3 is the length of the reference plate 15A. And can be obtained from: for that reason,
The distance Y between the reference plate 14A and the reference plate 15A is represented by t2, where the time interval between the reference plates 14A and 15A during which the light reflected light is received is t2.
It can be easily obtained by multiplying the average speed when passing through A and 15A by t2. This distance Y is the stroke amount of the rail 1. The operation of Y is

[0022]

(Equation 2)

Thus, the exact distance X between each reference plate is obtained.
And Y are obtained, these data are compared with the data obtained last time, and the displacement amount 23 is obtained.
When the displacement amount 23 exceeds a certain allowable range, the setting of the rail is changed. In short, the measuring vehicle 8 can automatically measure the stroke amount and the bulging amount of the rail simply by irradiating the light beam, receiving the reflected light beam from the reference plate, and calculating the receiving time. Therefore, high-precision measurement can be performed without imposing a burden on an operator and without being influenced by weather conditions such as wind and rain. In addition, since the automatic measurement can be performed while the measurement vehicle 8 is running, it is extremely efficient.

Incidentally, the present invention is not limited to the above-described embodiment, and can be appropriately changed. Although the case where the reference plate is installed inside the rail 1 and the tong rails 2a and 2b has been described, the reference plate may be outside. In this case, the optical sensors 17A and 17B of the measurement vehicle 8 also correspond to the outside of the rail. In addition, as a light beam and a light sensor, a laser and a laser sensor are optimal, but in addition, an LED sensor and the like can also be used.
It is not necessary to limit to a particular light beam and a particular sensor.

[0025]

As described above, in the present invention,
A reference plate for light reflection having a predetermined length fixed at the measurement reference position of the rail and the measurement reference position on the track, an optical sensor mounted on a measurement vehicle running on the rail, and a light beam mounted on the measurement vehicle. Since a device that measures the longitudinal movement of the rail is configured with an arithmetic processing device that receives the reflected light and processes and calculates the data, the measurement vehicle irradiates the light beam, receives the light reflected light from the reference plate, It is possible to automatically measure the stroke amount and the bulging amount of the rail only by calculating the reception time. Therefore, even in a line section having a large number of measurement points, highly accurate measurement can be performed without imposing a burden on an operator, very efficiently, and without being affected by weather conditions such as wind and rain.

[Brief description of the drawings]

1 shows a measuring vehicle according to the present invention, wherein FIG. 1 (A) is a side view and FIG. 1 (B) is a front view.

FIG. 2 is a block diagram showing an overall configuration of a measuring device according to the present invention.

FIGS. 3A and 3B are views showing a setting state of a reference plate in a rail immobile section according to the present invention, wherein FIG. 3A is a plan view and FIG. 3B is a rear view.

FIG. 4 is a plan view showing an installation state of a reference plate at a rail joint according to the present invention.

5 (A) is a plan view showing a reference plate and a distance between the reference plates, and FIG. 5 (B) is an output signal of light reflected light. FIG.

FIG. 6 is a plan view showing a procedure for measuring a stroke amount and a protrusion amount at a conventional rail joint.

FIG. 7 is a plan view showing a conventional procedure for measuring the amount of advance in a rail immobile section.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Rail 2a, 2b ... Tong rail 8 ... Measurement vehicle 9, 11A, 11B, 12A, 12B, 13, 14A,
14B, 15A, 15B Reference plate 16 Reference pile 17, 17A, 17B Optical sensor 18 Arithmetic processing unit 19 Waveform classifier 20 Time measuring unit 21 Arithmetic processing unit 22 Displacement calculating unit 23 Data recording unit 24 ... Displacement amount

Claims (2)

[Claims] An apparatus for measuring a vertical movement amount of a rail, comprising: a light-reflecting reference plate having a predetermined length fixed at a measurement reference position of a rail and a measurement reference position on a track;
An optical sensor mounted on a measurement vehicle running on rails,
A longitudinal movement amount measuring device for a rail, comprising: an arithmetic processing device mounted on the measuring vehicle for receiving reflected light of light rays and processing and calculating data. 2. A light-reflecting reference plate set to a predetermined length is installed at a measurement reference position on a rail and a track, and the speed of the measuring vehicle passing through each reference plate is determined by the length of the reference plate. Calculated from the passing time, the average value of the passing speeds of both reference plates is determined as the average speed of the measurement vehicle, and the average speed of the measuring vehicle and the passing time between the two reference plates are used to calculate the average value between the two measurement reference positions. A method of measuring a vertical movement amount of a rail, comprising calculating a distance and measuring a vertical movement amount of the rail by comparing the calculated distance with a preset reference length.