JPS6288098A - Running car discriminator in multiple lanes - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a device for identifying vehicles in each lane at a predetermined position in the longitudinal direction of the bridge in a bridge such as a highway bridge having multiple lanes. .

[Prior art]

When measuring the stress and deformation of each part of a road bridge under a certain loading condition on a road bridge in service, general traffic is temporarily shut off and a static load of a given size is applied to a given position on the road bridge. It is common to carry out a loading test.

However, on expressway bridges, etc., where it is required to perform the above measurements without interfering with normal traffic as much as possible, changes in each part of the bridge when a vehicle passes are dynamically measured using the normal passing vehicle as the load. A method of measuring is adopted. In this case, for road bridges with multiple lanes, the traveling position of passing vehicles is one of the main factors in the mechanical phenomena that occur in each part of the bridge, so it is necessary to determine the traveling path of passing vehicles, which will be the applied load. .

Conventionally, in road bridges such as expressway bridges having multiple lanes, devices for discriminating running vehicles in each lane at a predetermined position in the longitudinal direction of the bridge have been used to identify running lanes 9 and 9, as shown in FIGS. 10 and 11. The pavement 0 in the overtaking lane 8 is cut to a predetermined depth to form a groove 11 having a rectangular planar shape, a loop coil 12 is accommodated in the groove 11, and a filler 13 such as resin mortar is filled. Loop coil 12
A loop coil-embedded vehicle discriminating device is known that uses a detection device to detect a change in inductance of the loop coil 12 when a vehicle passes over the loop coil, thereby discriminating a vehicle in each lane.

However, in the case of the vehicle identification device of 2005, in order to install the loop coil, the pavement of the road is cut to create a groove, the loop coil is housed in the groove, and then the groove is filled with filler. If it is installed on a road that is in service, it will have a heavy impact on traffic, and if it is installed on a road that is currently in service, it will have a negative impact on traffic. There is a risk of malfunction due to nearby metal objects or strong magnetic fields.

Further, as shown in FIG. 12, columns 14 are fixed to the outer side of the driving lane 9 and the outer side of the passing lane 8, and a support beam 15 is cantilevered to each column 14 at a height of 5 m or more from the road surface. The ultrasonic wave transmitting/receiving spatula P1 is fixed at the tip of each support beam 15 above the center in the width direction of the driving lane 9 and the passing lane 8.
6 is installed, and the center of the road surface width direction from the ultrasonic wave transmitting/receiving head 16 periodically radiates ultrasonic pulses toward the road surface, and by detecting the time difference of the reflected waves, an ultrasonic wave that distinguishes between the road surface and the vehicle is generated.・ξ Lux reflection type vehicle identification device # is known.

However, in the case of this vehicle identification device, large-scale columns and support beams are required to install the ultrasonic wave transmitting/receiving head at a high place, which increases the construction cost and takes a long time. Furthermore, for safety and aesthetic reasons, it is often impossible to install the pillars, support beams, etc. In addition, the sensing distance (distance between the ultrasonic transmitting/receiving head and the detected vehicle) is relatively short (approximately 6 m), and it takes effort to adjust the sensing range, and the ultrasonic transmitting/receiving head is expensive. There is a problem.

Furthermore, as shown in FIG. 13, a support t18+r9 is fixed in a cantilever manner to the side of the bucket bridge 17 constructed above the expressway bridge 1 above the center of the driving lane and the passing lane, There is also known an ultrasonic reflection type vehicle discriminating device in which all ultrasonic wave transmitting/receiving heads 16 are attached to the tip of each support beam 18 and 19, but there is a problem that it cannot be installed unless there is a purchasing bridge.

1 [Object and structure of the invention] The object of the present invention is to provide a driving vehicle discrimination device for multiple lanes that can advantageously solve the above-mentioned problem. A first light emitter 2 and a first light receiver 6 constituting a first photoelectric switch are installed on one side and the other side of the road bridge 1 in the width direction.
A second light emitter 4 and a second light receiver 5, which constitute the entire second photoelectric switch, are installed, and the optical path 6 of the first photoelectric switch and the optical path 7 of the second photoelectric switch are located near the boundary between adjacent lanes. The first light receiver 6 and the second light receiver 5 are arranged so as to intersect in an X-shape, and the first light receiver 6 and the second light receiver 5 are connected to a light reception cutoff order discrimination device. be..

〔Example〕

Next, the present invention will be explained in detail using illustrated examples.

1 to 8 show an embodiment of the present invention, showing a road bridge 1 having 9 driving lanes and 8 overtaking lanes.
A first light emitter 2 is disposed at the rear in the vehicle running direction, and a second light emitter 4 is disposed at the front in the vehicle running direction at one side in the middle direction of the road bridge 1.
The other side in the width direction (i.e., the first light receiver 6 is disposed at the front in the vehicle running direction, and the second light receiver 5 is disposed at the rear in the vehicle running force direction, and each light emitting device 2.
4 and each light receiver 385 are each fixed to the base plate 20 with bolts, and the vertical height adjustment screw 21 fixed to the base plate 20 is attached to the ten end of the support rod 22 made of a metal tube. A lock nut 24 is screwed into the fixed female threaded member 26, and a lock nut 24 is screwed into the screw 21, and the light emitter and each light receiver are arranged at a level lower than the level of the upper part of the vehicle. There is.

A seat plate 25 fixed to the lower end of the support rod 22 is placed on the upper side of the road bridge 1, and the support rod 22 is brought into contact with the outer surface of the guardrail 26, and the inner surface of the guardrail 26 is provided with a support metal fitting. 27 are brought into contact with each other, and the upper and lower ends of the support fitting 27 and the support rod 22 are fastened together with the U-shaped belt 28, and the first light emitter 2 is directed toward the first light receiver B. The first photoelectric switch emits a light beam, and the first light emitter 2 and the first light receiver 3 constitute a first photoelectric switch.

The second light emitter 4 emits a light beam toward the second light receiver 5, and the second light emitter 4 and the second light receiver 5 constitute a second photoelectric switch, and the optical path 6 of the first nine light switch and The optical path 7 of the second photoelectric switch is inclined with respect to the vehicle traveling direction and intersects in an X shape near the boundary between the driving lane 9 and the overtaking lane 8, and each of the light receivers 3 and 5 is arranged as shown in FIG. As shown, different voltages are generated when the light beam from the light emitter 2.4 is being received and when the light is not being received.

FIG. 5 shows an example of a device for determining the order of light receiving and blocking and recording measurement data, in which the first amplifier 29 connected to the first light receiver B and the second amplifier 29 connected to the second light receiver 5 are shown. Drawer 6
0 is connected to the input part of the A/D converter, and electrical measuring elements 61 consisting of electrical displacement meters, accelerometers, strain meters, etc. are attached to a large number of measured positions on the road bridge 1. , each measurement element 31 is connected to the input part of an A/D converter 36 via a measurement signal amplifier 62, and a processing control device 64 consisting of an electronic computer is connected to the A/D converter 63. An external recording device 35 consisting of a floppy disk is connected to the output section of the processing control device 34, and the
The D converter 33 and the processing control device 64 constitute a light receiving/blocking order determining device.

The signal voltage detected by each of the light receivers 6.5 is amplified by an amplifier 29.30 and sent to the A/D converter 63, and the signal voltage detected by each of the measurement elements 31 is The measurement signal is amplified by the amplifier 32 and sent to the A/D converter 33.
Converts an analog signal (voltage signal) from 0.32 to a digital signal. The number of signals to be processed, processing speed, processing start, processing end, etc. are controlled by the processing control device 34.

Further, the processing control device 64 generally includes an o-ner/L,
It is called a core computer or mini computer, and it inputs data from external devices.

It has functions such as outputting data to external devices, performing numerical calculations, and controlling the operation of external devices.

At short time intervals, for example, Hoo −+o seconds, the output signals of the first amplifier 29 and the second amplifier 30 are sent to the processing controller 34 via the A/D converter 33, and the output signals of each amplifier 2
By comparing the output signal values of 9.30 from time to time, the order in which the light reception and cutoff of each light receiver 3.5 is detected is detected, and the time point at which the vehicle passes and the lane are determined.

Figure 7 shows a state in which the light reception of the second light receiver 5 is cut off after the light reception of the first light receiver B is cut off. indicates that it has passed. Moreover, FIG. 8 shows a state in which the light reception of the first light receiver 3 is cut off after the light reception of the second light receiver 5 is cut off, and in this case, the vehicle has passed through the driving lane 9 where the driving lane discrimination device is installed. It is shown that.

When the processing control device 34 detects the desired driving state, the processing control device 34 controls the A/D converter 3.
3, the data from each measurement signal amplifier 32 is also taken into the processing control device 34 ((((() The data is recorded on the recording device 65, and then the data recorded on the external recording device 35 is analyzed.

FIG. 9 shows another example of the light receiving/blocking order determination and measurement data recording device, in which the first amplifier 29, the second amplifier 30, and each measurement signal amplifier 62 are connected to the data recorder 3.
6, and a waveform recording device 37 is connected to the output section of the data recorder 36, and the signals from the first amplifier 29 and the second amplifier 30 for identifying a traveling vehicle, The measurement signals from each measurement signal amplifier 62 are continuously recorded on a magnetic tape for a certain period of time in a data recorder 36, and the signals recorded on the magnetic tape are drawn on a recording paper 38 in a waveform recording device 67. Based on the waveforms of the signals from the first amplifier 29 and the second amplifier 60 drawn on the recording paper 38, the passing point and lane of the vehicle are determined as described above, and each measurement signal amplifier 32 and the waveforms of the signals from the first amplifier 29 and the second amplifier 60, the relationship between the passing points and lanes of the vehicle and the measurement results is analyzed.

As shown in FIG. The sixth amplifier 41 installed and connected to the sixth light receiver 40 is
/ It may be connected to the input section of the D converter 36 or the data recorder 36.

In this way, the traveling speed, vehicle length, etc. of the vehicle can be detected.

〔Effect of the invention〕

According to this invention, the first light emitter 2 and the first light receiver constituting the first photoelectric switch, and the second photoelectric switch are installed on a part of the width direction and the other side of the road bridge 1 having multiple lanes. A second light emitter 4 and a second light receiver 5 are installed, and the optical path 6 of the first photoelectric switch and the optical path 7 of the second photoelectric switch intersect in an X shape near the boundary between adjacent lanes. Since the first light receiver 6 and the second light receiver 5 are connected to a light reception cutoff order determining device, by determining the light reception cutoff order of the first light receiver 3 and the second light receiver 5, At a predetermined location on a road bridge 1 with multiple lanes, it is possible to easily determine 1/ζ whether a vehicle has passed through the lane in question, and it can be used in combination with all inexpensive 2m light emitters and light receivers. In addition to being able to separate the vehicle f WJ, the emitters and receivers can be installed at low-level positions on both sides of the road bridge, so there is no need to install deep pillars and support beams as in the conventional case, which reduces construction costs. It is inexpensive, does not disturb the aesthetics, and can be installed without traffic restrictions.Furthermore, the photoelectric switch, which consists of a light emitter and a light receiver, has a longer sensing distance than an ultrasonic transmitting/receiving head. Effects such as ease of use can be obtained.

[Brief explanation of drawings]

1 to 8 show an embodiment of the present invention, in which FIG. 1 is a plan view showing the arrangement of a light emitter and a light receiver in a road bridge, and FIG. 2 is a vertical front view thereof; FIG. 6 is a partially longitudinal front view showing the support state of the emitter and receiver, FIG. 4 is a side view thereof, FIG. The figure shows the output voltage when the receiver receives light and when the light reception is cut off.
FIG. 8 and FIG. 8 are diagrams showing the order of light receiving and blocking of the first light receiver and the second light receiver. FIG. 9 is a diagram showing another example of the light receiving/blocking order determination and measurement data recording device. 10th
The figure is a plan view showing an example of a conventional vehicle discrimination device.
The figure is a sectional view taken along the line A-A in FIG. 10, FIG. 12 is a front view showing another example of a conventional vehicle discriminating device, and FIG. 13 is a front view showing another example of a conventional vehicle discriminating device. FIG. In the figure, 1 is a road bridge, 2 is a first light emitter, 6 is a first light receiver, 4 is a second light emitter, 5 is a second light receiver, 6 and Z are optical paths, 8 is a passing lane, and 9 is a Travel lane, 20 is plywood, 21
2 is a height adjusting screw, 22 is a support rod, 23 is a female screw member, 2
4 is a lock nut, 26 is a guardrail, 27 is a support fitting, 28 is a U-shaped bolt, 29 is a first amplifier, 60 is a second
61 is an electric measuring element, filter 2 is a measurement signal amplifier, 33 is an A/D converter, 64 is a processing control device, 35 is an external recording device, 36 is a data recorder, 67 is a waveform recording device , 68 is a recording paper, 39 is a sixth light emitter, 40 is a third light receiver, and 41 is a third amplifier.

Claims (1)

[Claims] A first light emitter 2 and a first light receiver 3 constituting a first photoelectric switch and a second light emitting device constituting a second photoelectric switch are installed on one side and the other side in the width direction of a road bridge 1 having multiple lanes. 4 and a second light receiver 5 are installed, and the optical path 6 of the first photoelectric switch and the optical path 7 of the second photoelectric switch are arranged so as to intersect in an X shape near the boundary between adjacent lanes. A traveling vehicle discrimination device for a plurality of lanes, characterized in that the first light receiver 3 and the second light receiver 5 are connected to a light reception cutoff order discrimination device.