JPH11325820A - Obstacle position measuring equipment of railway line - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a simple equipment constitution which can be mounted on rails by one worker, and measure construction gauge in a noncontact manner by using a laser sensor and a rotary encoder. SOLUTION: An obstacle position measuring equipment 1 of railway line is constituted of a truck 2 for measurement which is installed on rails 6a of railway line so as to be able to run; a laser sensor 11 which is rotatably attached on the truck 2 for measurement, a measuring part 3 of a rotary encoder 12 detecting a rotation angle of the laser sensor 11; and a controlling part 4 which performs signal processing of data from the measuring part 3, calculates distance of an object to be measured from a rail surface and its height, and displays and stores the distance and the height.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for measuring the distance and height of an object to be measured from a rail surface in a non-contact manner by using a laser sensor mounted on a measuring carriage traveling on a rail. The present invention relates to an apparatus for measuring an obstacle position on a railway track.

[0002]

2. Description of the Related Art A railway track has a platform for getting on and off a train, a roof thereof, and other various structures. In order to ensure the safety of trains and passengers, the distance from the rail surface and the height of these structures are determined as building limits. The positional relationship between building limits and structures
It may be changed due to remodeling work of the home and its roof, replacement work of rails and sleepers, etc. Before and after these works, and of course, at other times, Is typically measured.

[0003] By the way, as a conventional primitive method for measuring a building limit, a worker sets a right angle ruler on a rail surface as a reference and presses a right angle side of the right angle ruler to a platform. The distance from the center of the rail and the height are read by an operator.

As another conventional method, as a means for mechanizing the right angle ruler, an arm which can move forward and backward and can move up and down on a measuring cart is attached, and an attachment is attached to a tip portion of the arm, and this is attached to the upper end of the platform. In some cases, the height position of the attachment at that time and the position away from the center of the rail are read from a scale attached to the arm.

Further, as another conventional method, Japanese Patent Laid-Open Publication No.
There is a technique described in Japanese Patent No. 288519. According to this prior application, one projector for irradiating light having a specific peak wavelength, and two image receiving systems including a wavelength band selection mirror for the peak wavelength, a transmission filter, a light transmission filter, and two image receiving cameras are prepared. As one optical unit, and this optical unit is arranged on both sides and the ceiling of the measuring vehicle such that the fields of view of the respective image-receiving cameras overlap within the construction limit. The two sets of image receiving systems of each optical unit have their fields of view overlapping, so that obstacles within the architectural limit are simultaneously received by the two sets of image receiving cameras while traveling, and the background features are within the field of view. The object is received by each receiving camera. Then, the wavelength component of the image receiving camera is identified by a filter as light having a specific peak wavelength and reflected light of natural light,
Further, by processing this data, an obstacle within the building limit and a feature in the background are identified, and a distance interval to the obstacle within the building limit is calculated.

[0006]

According to a method in which an operator applies a right angle ruler to a rail surface and an object to be measured and measures the distance from the rail surface and the height, an operator holding the right angle ruler on the rail side; It requires at least three workers: a worker holding the object to be measured, such as a home, and a worker who reads a numerical value, and the number of workers is large for simple tasks. In addition, in this method, measurement must be performed every 5 m at a home or the like, and the number of operations is extremely large.
There are drawbacks that the burden on the worker increases and the post-processing of the measured data requires enormous effort.

In the conventional method in which the method based on the right angle ruler is mechanized, a running motor for the measuring cart, an arm reciprocating mechanism, an elevating mechanism, and the like are required, so that the weight of the entire apparatus becomes heavy, and the apparatus is placed on rails. More than three workers were required to transfer the material. In addition, in this case, there is a disadvantage that a great deal of labor is required for post-processing of the measured data.

Further, in the case of the above-mentioned prior art, it is necessary to separately manufacture a measuring vehicle separately, and it is necessary to arrange a large number of optical units on both sides and a ceiling of the measuring vehicle so as to overlap each other. However, there is a disadvantage that the entire cost becomes extremely enormous. In addition, when a measurement vehicle is used as described above, adjustment with a train schedule and a meeting with a station are required, and there is a disadvantage that measurement work becomes large.

[0009]

SUMMARY OF THE INVENTION The present invention has been improved and eliminated in view of the above-mentioned problems, and can be transferred to a rail by one worker, and can be performed by one laser sensor and a rotary encoder. An object of the present invention is to provide a railroad track obstacle position measuring device having a simple device configuration capable of measuring a building limit in a non-contact manner.

[0010] In order to solve the above-mentioned problems, the present invention employs a measuring truck mounted on a rail of a railway line so as to be able to run on the rail, and a rotating truck mounted on the measuring truck. A freely mounted laser sensor and a measuring unit of a rotary encoder that detects the rotation angle thereof, and data processing from the measuring unit is processed by signal processing to calculate the distance and height of the object to be measured from the rail surface, and calculate this. An obstacle position measuring device for a railway track, comprising a control unit for displaying and storing.
By using a laser sensor and a rotary encoder mounted on a measurement cart, it is possible to automatically measure the distance and height of the measurement object from the rail surface in a non-contact manner. In addition, the components are simpler, the cost can be greatly reduced, and the burden on the operator who handles the device can be reduced.

According to a second aspect of the present invention, there is provided the railroad track obstacle position measuring device according to the first aspect, wherein the measuring cart, the measuring unit, and the control unit can be separated from each other. The measuring unit and the control unit are simply mounted on the measuring cart, and furthermore, since they are configured to be separable, the measuring cart can be a frame made of aluminum alloy or the like.
Therefore, the weight of the entire apparatus is reduced, and even one worker can transfer the apparatus onto the rail. Therefore, it is possible to perform the work of measuring the building limit without adjusting the train schedule.

According to a third aspect of the present invention, the control unit displays and stores the distance and height of the object to be measured from the rail surface and can simultaneously input position information of the object to be measured. Or an obstacle position measuring device for a railway line described in 2. In addition to the measurement data, data for specifying the position of the measurement object can be input at the same time and can be stored and stored, so that post-processing of the data is extremely simple.

[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. 1 to 4 relate to an embodiment of the present invention. FIG. 1A is a plan view showing the entire obstacle position measuring device, and FIG. 1B is a front view thereof. FIG. 2A is a view of the measuring unit viewed from a side surface (a direction perpendicular to the rail).
FIG. (B) is a drawing viewed from the front (the traveling direction of the rail). FIG. 3 is a plan view of the control unit, and FIG. 4 is a drawing for explaining the principle of measurement. As shown in FIG. 1A and FIG. 1B, an obstacle position measuring device 1 according to this embodiment
Is composed of a measuring cart 2, a measuring unit 3, and a control unit 4.

The measurement cart 2 is formed by forming a frame 5 made of an aluminum alloy angle iron (angle material) or the like into a frame, and is urged by a spring 7 to a position corresponding to one of the rails 6a. One wheel 8 is mounted, and two wheels 9a and 9b are mounted at predetermined intervals at positions corresponding to the rail 6b on the other side. Measurement unit 3
In FIG. 1, a rotatable laser sensor 11, a rotary encoder 12 for detecting a rotation angle of the laser sensor 11, and a stepping motor 13 for rotating the laser sensor 11 are attached to a supporting member 10 having a housing. The housing-like support member 10 is detachably attached to the center position of the frame 5 of the measurement cart 2 via a fastening member 14 such as a bolt. The laser sensor 11 has a light projecting portion 11a and a light receiving portion 11b for laser light,
The reflected light from the object to be measured of the laser beam emitted from the light projecting unit 11a is received by the light receiving unit 11b, and the distance to the object to be measured is measured by detecting a deviation in the wavelength of the laser beam. I have.

The control unit 4 also calculates the distance and height of the object to be measured from the rail surface calculated based on signals from the laser sensor 11 and the rotary encoder 12, the name of the section where the object to be measured exists, position data, etc. Display 1 for displaying
5 and an operation unit 1 for inputting a section name, position data, etc.
6 and a storage unit (not shown) for storing these data. The control unit 4 includes a frame 5 of the measurement cart 2.
It is designed to be attached to the upper surface of a support stand 17 which is detachably installed via a fastening member 14 such as a bolt, so that the worker can check data in a standing posture,
The height is set to be convenient for operation.

Next, the operation of the thus constructed railway track obstacle position measuring apparatus 1 will be described. First, the measuring cart 2 and the measuring unit 3 are moved to the place where the object to be measured exists.
Is transported with the control unit 4 separated. Each of these components is extremely lightweight, weighs at most about 20 kg even for the entire apparatus, and can be carried and carried by an operator. Therefore, for example, when measuring the building limit of the platform and the roof of the station, each component of the apparatus 1 is separately carried to the measurement start point position at the end of the platform, and the measurement cart 2 is railed at the measurement start point position. 6a and 6
b. At this time, the wheel 8 on one side is urged by the spring 7 to the left in FIG. 1B, so that the flanges of the wheels 8 and 9a, 9b come into close contact with the left and right rails 6a, 6b as a reaction force. The center of the measuring cart 2 is aligned with the centers of the left and right rails 6a and 6b. If the orbit has a cant,
It shows a posture corresponding to that cant.

Thereafter, the measuring unit 3 and the control unit 4 are fixed to the frame 5 of the measuring cart 2 via bolts 14 and the like. The measurement unit 3 is attached to the center position of the measurement cart 2. Therefore, when the measuring unit 3 is attached to the measuring trolley 2, the rail 6a is automatically set.
The rotation center position of the laser sensor 11 is set to be on the center line of the laser beam 6 and 6b. Finally, the laser sensor 1
When 1 and the output terminal of the rotary encoder 12 are connected to the input terminal of the control unit 4, the preparation for measurement is completed. The power source of these devices is a battery system which is convenient for carrying.

When the setting of the obstacle position measuring device 1 is completed in this way, as shown in FIG. 4, a reflector 19 is installed at the upper end of the platform 18, and the reflector 19 has the same level as the upper end position of the platform. The laser beam is emitted from the laser sensor 11 to the white line provided at the position while changing the angle of the laser sensor 11 by the stepping motor 13. Then, the reflected light is received, and the distance r to the reflection plate 19 is measured.
This distance r is the distance from the center of the rail even when the track is canted. Accordingly, by detecting the angle of the laser sensor 11 at that time with the rotary encoder 12, the angle θ from the rail center to the rail surface with respect to the rail surface can be obtained.
Therefore, the distance D from the rail center of the rail surface to the tip of the platform 18 can be obtained by D = r · cos θ.
The height H to the tip of 8 can be obtained by H = r · sin θ. These calculations are automatically performed by the central processing unit incorporated in the control unit 4 and displayed on the display unit 15. At this time, it is possible to simultaneously input the station name, the measurement position, and the like, and the measurement data and the specification of the measurement position are stored in the memory unit. Similarly, at the same measurement position, the distance r to the roof is measured by the laser sensor 11, the angle θ at that time is detected by the rotary encoder 12, and these signals are processed by the control unit 4, whereby the rail on the rail surface is processed. The distance D from the center and the height H are calculated, displayed and stored.

Thereafter, the measuring cart 2 is moved to the next measuring point, the distance D from the center of the rail of the platform 18 and the roof and the height H are calculated and displayed and stored in the same manner, and this is repeated. The intended measurement operation is completed. After the measurement work is completed, the data stored in the control unit 4 is printed out as necessary, read into a personal computer, or transferred to another computer or the like using a line, and is designed in advance. For example, comparison with data is performed. In this case, since all of the measured data are stored, it is not necessary to make a new entry or input to a computer, which is extremely easy. On the other hand, after the measurement operation is completed, the measuring unit 3 and the control unit 4
And the measuring cart 2 is also removed from the rails 6a and 6
b. Then, it can be carried and carried by a worker, and can be easily stored in a predetermined storage place or the like.

Incidentally, the present invention is not limited to the above-described embodiment, and can be appropriately changed. For example, when measuring the tip of the home 18, the reflecting plate 18 is used. However, if the home has a structure in which the laser beam is sufficiently reflected, the reflecting plate 18 can be omitted. It is also possible to measure the distance D from the rail center of the rail surface and the height H in a non-contact manner for structures other than the home and its roof.

[0021]

As described above, in the present invention,
A measuring truck installed movably on rails of a railway track, a laser sensor rotatably mounted on the measuring truck, and a measuring unit of a rotary encoder for detecting the rotation angle thereof; The signal processing of the data calculates the distance and height of the object to be measured from the rail surface, and the control unit that displays and stores the data constitutes a railroad track obstacle position measuring device. And the angle signal from the rotary encoder make it possible to automatically measure the distance and height of the object to be measured from the rail surface in a non-contact manner. Cost savings,
The burden on workers handling this can be greatly reduced.

In the present invention, the measuring cart, the measuring unit, and the control unit can be separated from each other, so that they can be assembled at the measuring site and each of the components is extremely lightweight. Since the apparatus is composed of members, the entire apparatus can be constructed with a weight of at most about 20 kg, and it can be carried and carried by one worker and transferred to a rail. Therefore, it is possible to perform the work of measuring the building limit without adjusting the train schedule.

Further, according to the present invention, the control unit can display and store the distance and the height of the object to be measured from the rail surface, and can simultaneously input the position information of the object to be measured. In addition, data for specifying the position of the object to be measured can be input at the same time and can be stored and stored, so that post-processing of the data is extremely simple.

[Brief description of the drawings]

FIG. 1 relates to an embodiment of the present invention, in which FIG. 1 (A) is a plan view showing an entire obstacle position measuring device, and FIG. 1 (B) is a front view thereof.

FIGS. 2A and 2B relate to an embodiment of the present invention, in which FIG. 2A is a drawing of a measuring unit viewed from a side surface (a direction orthogonal to a rail), and FIG. ).

FIG. 3 is a plan view of a control unit according to one embodiment of the present invention.

FIG. 4 is a drawing for explaining the measurement principle of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Obstacle position measuring device 2 ... Measurement trolley 3 ... Measuring part 4 ... Control part 5 ... Frame 6a, 6b ... Rail 8, 9a, 9b ... Wheel 11 ... Laser sensor 12 ... Rotary encoder 13 ... Stepping motor 15 ... Display Part 16 ... Operation part 18 ... Station platform 19 ... Reflector

Continued on the front page (72) Inventor Hideaki Emoto 2-4-2, Shibata, Kita-ku, Osaka-shi Inside West Japan Railway Company (72) Inventor Toru Igarashi 1-7-20-502 Sumiyoshi 1-chome, Ikeda-shi, Osaka

Claims (3)

[Claims] 1. A measuring truck installed movably on rails of a railway track, a laser sensor rotatably mounted on the measuring truck, and a measuring unit of a rotary encoder for detecting a rotation angle of the laser sensor. An obstacle position measuring device for a railway track, comprising: a control unit that calculates a distance and a height of an object to be measured from a rail surface by performing signal processing on data from the measuring unit, and displays and stores the calculated distance and height. 2. The railway track obstacle position measuring device according to claim 1, wherein the measuring cart, the measuring unit, and the control unit can be separated from each other. 3. The control section displays and stores the distance and height of the object to be measured from the rail surface, and can simultaneously input positional information of the object to be measured.
An obstacle position measuring device for a railway track according to claim 1.