JP2012173254A - Inspection measurement method and apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect only a bracket safely in traveling without erroneously detecting other objects other than the bracket.SOLUTION: An inspection measurement apparatus applies light to the upper surface of a protection board of an electricity supply third rail by using length measurement sensor means loaded on an inspection measurement vehicle, detects displacement on the upper surface of the protection board by receiving reflected light reflected from the protection board and detects a position of a bracket to be a metal fitting for the protection board based on the displacement on the upper surface of the protection board, which is detected by the length measurement sensor means. In addition to the bracket, structures such as bolts are attached to the protection board. In this invention, displacement on the upper surface of the protection board is detected by the length measurement sensor means using laser light and the existence and position of the bracket are detected. Since the displacement detected by the length measurement sensor means corresponds to height from the upper surface of the protection board up to the upper part of the bracket and detection width corresponds to the plate thickness of the bracket, only the bracket is detected by comparing the detected values with reference values indicating the height and width of the bracket.

Description

  The present invention relates to a measuring method and apparatus for measuring the height and separation of an electric power supply third rail based on the position of a mounting plate (arm bracket) of a protective plate, and particularly detects the position of the arm bracket with high accuracy. It is related with the inspection method and apparatus which can be performed.

  A facility such as a subway has a rail (a third rail for supplying electricity) that supplies electricity to a commercial train. There is a metal fitting for electricity supply on the side of the carriage of the business train. The metal train is in contact with the third rail for electricity supply to receive electricity and the business train is running. Therefore, the third rail for supplying electricity may be deformed due to wear or the like, and when the track shape changes, the rate of wear changes accordingly.

  In addition, in order to streamline maintenance and the like, there is an electric power supply third rail inspection device that measures the height and separation of the electric power supply third rail with reference to the traveling rail while traveling. The bracelet becomes a measurement point for measuring each measurement item of the third rail measuring device, and the position on the route can be easily grasped by counting the bracelet. As a method for detecting a brace, the method described in Patent Document 1 is known.

JP-A-5-141947

  The device described in Patent Document 1 detects the arm metal using an ultrasonic sensor, and grasps the position on the route by counting the measurement points and the arm metal for measuring each measurement item. However, since an object other than the arm metal, for example, a mounting bolt made of metal or the like, exists on the protective plate, there is a problem that the arm metal detection method using the ultrasonic sensor is easily erroneously detected. In addition, the arm detection method using an ultrasonic sensor may threaten the vehicle limit, and depending on the running state of the vehicle, the ultrasonic sensor itself may contact the ground side equipment. There was a risk of damaging the side equipment.

  The present invention has been made in view of the above-described points, and provides a measurement method and apparatus that can safely detect only a metal bracelet without erroneously detecting an object other than the metal armor. The purpose is to do.

  The first characteristic of the inspection method according to the present invention is that light is applied to the upper surface of the protective plate of the third rail for power supply using the length measuring sensor means mounted on the inspection vehicle and reflected from the protective plate. The amount of displacement on the upper surface of the protective plate is detected by receiving the reflected light, and the position of the brace that is the mounting bracket of the protective plate is determined based on the amount of displacement on the upper surface of the protective plate detected by the length measuring sensor means. It is to detect. The protection plate has a structure such as a mounting bolt in addition to the arm bracket, and there is a possibility of erroneous detection by a detection method using an ultrasonic sensor. Therefore, in the present invention, the amount of displacement on the upper surface of the protective plate is detected using a length measuring sensor means using laser light, and the presence and position of the armrest are detected.

  A second feature of the inspection method according to the present invention is that, in the inspection method according to the first feature, the arm metal is based on a displacement amount on the upper surface of the protection plate detected by the length measurement sensor means. It is to detect the position of the arm metal by detecting the height and width (plate thickness) of the plate and comparing it with a reference value. This is because the displacement detected by the length measuring sensor means corresponds to the height from the upper surface of the protective plate to the upper part of the armrest, and the detected width corresponds to the thickness of the armrest. By comparing with the reference values indicating the height and width of the arm, only the arm is detected even when a structure other than the arm is present.

  A third feature of the inspection method according to the present invention is that, in the inspection method according to the second feature, the height and width (plate thickness) of the arm metal plate are provided on the axle of the inspection vehicle. The detection is based on the encoder signal. This is to detect the width of the brace based on the sampling pulse output from the encoder in accordance with the traveling of the inspection vehicle.

  A fourth feature of the test method according to the present invention is that, in the test method according to the first feature, the length measuring sensor means is on the upper surface of the protection plate and perpendicular to the traveling direction of the test vehicle. It is to be installed in the inspection vehicle so as to irradiate light to the separated places in various directions. This is because a plurality of measuring sensor means are installed in the inspection vehicle, and the installation state is such that light is irradiated on the upper surface of the protective plate and spaced apart in the direction perpendicular to the traveling direction of the inspection vehicle. is there. The detection accuracy can be improved by taking the logical product of the detection results of the plurality of length measuring sensor means. A plurality may be installed at spaced positions in the traveling direction of the inspection vehicle.

  A fifth feature of the test method according to the present invention is the test method according to the fourth feature, wherein the position of the armrest is detected based on a logical product of detection results of the plurality of length measurement sensor means. Inspection method characterized by doing.

  The first feature of the inspection apparatus according to the present invention is that it is mounted on an inspection vehicle, irradiates light on the upper surface of the protection plate of the third rail for power supply, and receives reflected light reflected from the protection plate. A length measuring sensor means for detecting a displacement amount on the upper surface of the protection plate, and a position of a brace that is a mounting bracket for the protection plate is detected based on the displacement amount on the upper surface of the protection plate detected by the length measurement sensor means. It is provided with a bracelet detecting means. This is an invention of an inspection apparatus corresponding to the first feature of the inspection method. In the present invention, the inspection device is a concept including an inspection device mounted on an inspection vehicle and an inspection vehicle equipped with the inspection device.

  A second feature of the measurement apparatus according to the present invention is that in the measurement apparatus according to the first feature, the amount of displacement on the upper surface of the protective plate detected by the length measurement sensor means is detected by the armature detection means. The height and width (plate thickness) of the arm metal plate are detected based on the above, and the position of the arm metal is detected by comparing it with a reference value. This is an invention of an inspection apparatus corresponding to the second feature of the inspection method.

  According to a third aspect of the inspection apparatus of the present invention, in the inspection apparatus according to the second aspect, the armrest detection means determines the height and width (thickness) of the armrest plate. The detection is based on the signal of the encoder provided on the axle of the inspection vehicle. This is an invention of an inspection apparatus corresponding to the third feature of the inspection method.

  A fourth feature of the inspection apparatus according to the present invention is that, in the inspection apparatus according to the first feature, the length sensor means is on the upper surface of the protection plate and perpendicular to the traveling direction of the inspection vehicle. A plurality of such vehicles are installed in the inspection vehicle so as to irradiate light at spaced locations along a certain direction. This is an invention of an inspection apparatus corresponding to the fourth feature of the inspection method.

  According to a fifth feature of the measurement apparatus of the present invention, in the measurement apparatus according to the fourth feature, the armrest detection means is based on a logical product of detection results of the plurality of length measurement sensor means. The position of the armrest is to be detected. This is an invention of an inspection apparatus corresponding to the fifth feature of the inspection method.

  According to the present invention, there is an effect that it is possible to safely detect only the arm metal while traveling without detecting other objects other than the arm metal.

It is a figure which shows schematic structure of the inspection apparatus which concerns on this invention. It is a figure which shows schematic structure and the operation | movement waveform of a highly accurate armrest detection system using the length measuring sensor for armrest position detection of FIG. It is a figure which shows the operation | movement waveform of FIG.

  FIG. 1 is a diagram showing a schematic configuration of the inspection apparatus according to the present invention. FIG. 1 shows only one of the two traveling rails (the left traveling rail 10L in the figure). Accordingly, the same is provided on the other right rail, but the illustration thereof is omitted in FIG. As shown in FIG. 1, a third rail 12 for electricity supply is provided on an insulator 11 installed at intervals of several meters along the direction in which the vehicle travels (the laying direction of the traveling rail 10L). The third rail 12 for supplying electricity is protected by a protective plate 13 provided on the upper side thereof. The protective plate 13 is fixed with bolts by an L-shaped arm metal 14. Similarly to the insulator 11, the brace 14 is installed at intervals of several meters along the direction in which the vehicle travels (the laying direction of the traveling rail 10L). As shown in FIG. 1, the L-shaped brace 14 is installed so that the short axis direction is parallel to the ground and the long axis direction is perpendicular to the ground. The protective plate 13 is provided between the L-shaped short axis parallel to the ground and the ground, and is provided so as to protect the third rail 12 for electricity supply along the laying direction of the third rail 12 for electricity supply. . FIG. 1 also shows only one side (the left side in the figure) of the third rail 12 for supplying electricity, but depending on the structure such as a branching portion on the track, the side rail may be installed on the right side of the rail. is there.

  In FIG. 1, the inspection apparatus includes length measuring sensors 1 a and 1 b for detecting arm position, a two-dimensional sensor 2 for traveling rail, a two-dimensional sensor 3 for third rail, a length measuring sensor 4 for arm metal horizontal distance, and a protection plate The two-dimensional sensor 5 is used. In the figure, the inspection device on one side of the rail is shown in the same manner as described above, but actually, the inspection device having the same configuration is also provided on the right side. The armature position detection length measuring sensors 1a and 1b irradiate laser light obliquely from the upper side of the armband 14 so that the upper surface position of the L-shaped armature 14 becomes a target, and receive the reflected light. ing. In the figure, two length measuring sensors 1a and 1b for detecting the position of the arm bracket are provided along the width of the arm bracket 14, but one may be used. Details of the measuring method of the armature position detection length measuring sensors 1a and 1b will be described later.

  The traveling rail two-dimensional sensor 2 detects the position of the traveling rail 10 </ b> L serving as a reference for the height and horizontal distance of the third rail 12 for supplying electricity and the like. Since the configuration of the traveling rail two-dimensional sensor is well known, its details are omitted. The two-dimensional sensor 3 for the third rail detects the height from the top surface of the traveling rail 10L as the height TH of the third rail 12 for electricity supply, and from the inner end surface of the traveling rail 10L to the center of the third rail 12 for electricity supply. The distance is detected as a horizontal distance TD. The arm metal horizontal distance measuring sensor 4 detects the distance from the inner end surface of the traveling rail 10L to the inner end surface of the L-shaped arm metal 14 as the arm metal horizontal distance AD. The protective plate two-dimensional sensor 5 uses the height from the top surface of the traveling rail 10L to the lower surface of the protective plate 13 as the height PH of the protective plate 13, and from the inner end surface of the traveling rail 10L to the inside of the protective plate 13 (the traveling rail). 10L side) The distance to the end face is detected as the horizontal distance PD. The armature position detection length sensors 1a and 1b detect the armband 14 using a laser beam. The points measured by the above-described third-rail two-dimensional sensor 3, arm metal horizontal distance measuring sensor 4, and protective plate two-dimensional sensor 5 are determined by the arm metal position detecting length sensors 1 a and 1 b. Each measured value is calculated at the detected location. In FIG. 1, an alternate long and short dash line 17 indicates a vehicle limit of the inspection vehicle (not shown), an alternate long and two short dashes line 18 indicates a building limit, and a dotted line 19 indicates a collector shoe limit.

  FIG. 2 is a block diagram showing a schematic configuration of a high-precision armrest detection system using the armature position detection length measuring sensor of FIG. FIG. 3 is a diagram showing operation waveforms of FIG. As shown in FIG. 2, the arm metal detection system includes arm metal position detection length measuring sensors 1 a and 1 b, an A / D converter 60, an in-vehicle encoder 61, and a CPU 63. The wristwatch detection system in FIG. 2 is incorporated in a system for measuring the third rail 12 for supplying electricity, in particular, in the measurement apparatus according to the present invention. The armature position detection length measuring sensors 1a and 1b constituting the inspection device are mounted and installed on the vehicle body of the inspection vehicle traveling on the traveling rail 10L. The A / D converter 60 converts the analog signals output from the armature position detection length measuring sensors 1a, 1b into digital signals 60a, 60b and outputs them to the CPU 63. The in-vehicle encoder 61 is attached to the axle of the track inspection vehicle and outputs a sampling pulse 61 a corresponding to the rotation of the axle to the CPU 63. The CPU 63 calculates the dimensions (height and width (plate thickness)) of the arm metal plate 14 based on the digital signals 60a and 60b from the A / D converter 60 and the sampling pulse 61a from the in-vehicle encoder 61. Is compared with a reference value of the dimension of the arm metal 14 to determine the presence and position of the arm metal 14. Note that the dimensions (height and width (thickness)) of the arm metal plate 14 serving as a reference value are determined in advance, and the dimensions are stored in an internal memory in the CPU 63.

  As shown in FIG. 1, the armature position detection length measuring sensors 1 a and 1 b that detect the armband 14 are on the third rail 12 side for electric supply and on the upper side of the guard plate 13 ( Installed on the inspection equipment). The armature position detection length measuring sensors 1a and 1b project the laser beams 6a and 6b to the spaced positions on the upper end side of the armband 14, respectively. The armature position detection length measuring sensors 1a and 1b are attached at positions where the laser beams 6a and 6b are located on the upper surface of the protective plate 13 as a target. When an inspection vehicle (not shown) equipped with such an inspection device travels on the traveling rail 10L, the upper surface of the protective plate 13 is irradiated from the armature position detection length measuring sensors 1a and 1b targeting the protective plate 13. The armature position detection length measuring sensors 1a and 1b respectively receive the received laser light. Outputs from the armature position detection length measuring sensors 1a and 1b are converted by the A / D converter 60 and input to the CPU 63 as digital signals 60a and 60b as shown in FIG. At the same time, the sampling pulse 61 a is also input from the in-vehicle encoder 61 to the CPU 63.

  As shown in FIG. 1, the uneven portion of the arm metal 14 is located at the upper surface position of the protection plate 13 at the location where the arm metal 14 exists. At this time, the laser light applied to the upper surface of the protection plate 13 from the armature position detection length measuring sensors 1a and 1b follows the concavo-convex portion of the armband 14 according to the traveling of the inspection vehicle. The armature position detection length measuring sensors 1 a and 1 b output an analog signal corresponding to the laser beam received following the concavo-convex portion of the armband 14 to the A / D converter 60. The A / D converter 60 converts the analog signal into digital signals 60 a and 60 b and outputs the digital signals to the CPU 63. On the other hand, a sampling pulse 61 a corresponding to the traveling of the inspection vehicle is taken into the CPU 63 from the in-vehicle encoder 61. The CPU 63 calculates the height 60h and the width 60w of the pulses of the digital signals 60a and 60b based on the sampling pulse 61a of the in-vehicle encoder 61. The pulse height 60h of the digital signals 60a and 60b indicates the height of the arm metal 14, and the pulse width 60w of the digital signals 60a and 60b is the width (plate thickness) of the arm metal 14. The CPU 63 determines whether or not the height 60h and the width 60w of the arm metal 14 calculated in this way match the dimensions of the arm metal plate stored in the internal memory in advance (whether they are within a predetermined allowable range). ), If they match, it is determined to be a brace 14 and if they do not match, it is determined to be some foreign object. In this embodiment, it has been described that the same signals 60a and 60b are output from the armature position detecting length measuring sensors 1a and 1b, but different signals 60a from the armature position detecting length measuring sensors 1a and 1b, respectively. , 60b, the logical product of the two may be taken. For example, when a pulse having a height of 60h and a width of 60w is detected in the digital signal 60a and no pulse is detected in the digital signal 60b, the digital signal 60a can be determined as a false detection. It is possible to eliminate erroneous detection by taking the logical product of.

  In the above-described embodiment, the case where two armature position detection length measuring sensors are mounted and installed in the inspection vehicle has been described. In the above-described embodiment, the case where two armature position detection length measuring sensors are arranged side by side in a direction perpendicular to the traveling direction of the inspection vehicle has been described. It may be provided. In this case, a pulse waveform having a height of 60 h and a width of 60 w as shown in FIG. 3 appears in the digital signals 60 a and 60 b with a predetermined time difference. If a pulse does not appear with this predetermined time difference, it can be determined that one of the pulses is a false detection. Further, one of the two armature position detection length measuring sensors may be used for detecting the support point of the lever 11 or a length measurement sensor for detecting the support point of the lever 11 may be provided separately. Good.

10L ... running rail,
11 ... Reiko,
12 ... Third rail for power supply,
13 ... Protective plate,
14 ... Brace,
1a, 1b ... Length measuring sensor for detecting arm position,
2 ... 2D sensor for running rail 3 ... 2D sensor for third rail,
4 ... Length measuring sensor for armrest horizontal distance,
5 ... Two-dimensional sensor for protective plate,
60 ... A / D converter,
61 ... In-vehicle encoder,
61a ... Sampling pulse,
63 ... CPU,
17 ... Vehicle limit,
18 ... Architectural limits,
19 ... Collector shoe limit

Claims (10)

A length measuring sensor means mounted on the inspection vehicle is used to irradiate light on the upper surface of the protection plate of the third rail, and to detect the amount of displacement on the upper surface of the protection plate by receiving reflected light reflected from the protection plate. ,
An inspection method comprising: detecting a position of a brace that is a mounting bracket of the protection plate based on a displacement amount on the upper surface of the protection plate detected by the length measurement sensor means.   2. The inspection method according to claim 1, wherein a height and a width (plate thickness) of the arm metal plate are detected based on a displacement amount on the upper surface of the protection plate detected by the length measuring sensor means, An inspection method, wherein the position of the armrest is detected by comparing with a reference value.   3. The inspection method according to claim 2, wherein a height and a width (plate thickness) of the arm metal plate are detected based on a signal of an encoder provided on an axle of the inspection vehicle. Measuring method.   2. The inspection method according to claim 1, wherein the length measurement sensor means irradiates light to a spaced portion in a direction perpendicular to the traveling direction of the inspection vehicle on the upper surface of the protection plate. Inspection method, characterized in that a plurality of vehicles are installed in a car.   5. The inspection method according to claim 4, wherein the position of the armrest is detected based on a logical product of detection results of the plurality of length measurement sensor means. A length measuring sensor means mounted on the inspection vehicle, irradiating light on the upper surface of the protection plate of the third rail, and detecting the amount of displacement on the upper surface of the protection plate by receiving reflected light reflected from the protection plate;
Armature detecting means comprising armrest detecting means for detecting a position of an armrest that is a mounting bracket of the protection plate based on a displacement amount on the upper surface of the protection plate detected by the length measurement sensor means. .   7. The inspection device according to claim 6, wherein the arm metal detecting means is configured such that a height and a width (plate thickness) of the arm metal plate based on a displacement amount on the upper surface of the protection plate detected by the length measuring sensor means. ) And detecting the position of the brace by comparing it with a reference value.   8. The inspection device according to claim 7, wherein the armrest detecting means detects the height and width (plate thickness) of the armrest plate based on a signal of an encoder provided on an axle of the inspection vehicle. Inspection device characterized by doing.   7. The inspection method according to claim 6, wherein the length measurement sensor means irradiates light to a portion of the upper surface of the protection plate that is spaced along a direction perpendicular to the traveling direction of the inspection vehicle. Inspection apparatus characterized by being installed in the inspection vehicle.   10. The inspection device according to claim 9, wherein the arm metal detecting means detects the position of the arm metal based on a logical product of detection results of the plurality of length measuring sensor means. .

Images