JPS62178603A - Method for measuring traverse unevenness quantity of road surface - 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 The present invention is capable of measuring the amount of cross-sectional unevenness of a road surface, such as the amount of ruts and the amount of labeling, on paved roads, runways, etc.
This invention relates to a method for measuring the amount of transverse unevenness on a road surface while driving a measuring vehicle.

Conventionally, as a method for measuring the amount of transverse unevenness of a paved road surface, that is, the state of rutting, there is a method using a straight ruler or a water system.

This method involves setting a 3.6 m straight ruler or water system to the width of the lane, reading the height to the road surface on a scale at 20 crn pitch, and drawing the shape of the ruts. An improved version of this is the transverse glofilometer.

In this system, a measuring wheel moves on a reference stand and is linked to a recording device to record the shape of the rut.

The method of calculating the rut depth at each point is the same as the straight edge or water system method, but while these methods read the rut value directly on site, the transverse profilometer uses a drawing on a piece of paper. You can read it from the shape of the ruts.

In these methods, the devices themselves are relatively inexpensive and can be easily handled. However, there are disadvantages in that the measurement requires personnel and is time consuming.

Ruts can be measured for each lane at intervals of 50 to 100 m to evaluate road surface properties, but when measuring the amount of unevenness on a road surface for maintenance and repair of the pavement surface, , it is necessary to take measurements at 20m intervals, which requires a lot of effort.

There is also a method using a rut measuring vehicle. This method involves mounting a laser beam projection device or streak projection device on the vehicle and a photographing device that photographs the projection of the laser beam onto the road surface, and continuously photographs the ruts while driving. The interpretation of the photographic results is done by computer processing. This method has the advantage of being quick to measure, can be used to calculate the volume of rutted areas when performing maintenance and repair, and can accurately determine the amount of leveling. However, these devices are expensive because they use special optical equipment, and require a dedicated measuring vehicle to mount them.

You will also need a highly advanced computer. Furthermore, since the photographing is performed by projecting onto the road surface from a laser beam projection device or a line projection device, the work must be carried out at night. Therefore, it has the disadvantage of being too expensive to measure and maintain.

Furthermore, the above-mentioned measurement methods all measure the amount of traverse unevenness with respect to the lane width so that the vehicle can cross the lane correctly.

The present invention does not require as much expense as a rut measuring vehicle, is simpler than methods using straight rulers, water systems, or transverse profilometers, and does not require labor or time to measure the amount of transverse unevenness of a road surface. The purpose of this study is to provide a method for measuring.

In addition, the present invention provides a reference stand that extends in the horizontal direction on a stand supported by a vehicle or a movable stand connected to the rear of the vehicle, and that the reference stand is movable left and right in response to electric signals to measure the distance to the road surface. Using a measuring car equipped with an unevenness measuring device, a distance measuring wheel, and a transmitter and recorder that synchronizes with the distance measuring wheel and transmitting an electric signal to start the road surface unevenness measuring device, The distance to the road surface is determined by driving the road surface unevenness measurement device on the reference stand using the electric signal from the transmitter that is sent out at each measuring distance interval of the lane while driving uniformly on the lane of the road. A method of measuring a road surface diagonally across the road surface, recording these measured values on a recorder corresponding to the position of the lane width, and calculating the amount of rutting etc. based on these measured values. The gist of this paper is a method for measuring the amount of transverse unevenness.

The present inventor has developed a simple measuring device that can be manufactured without the expense of conventional high-grade rut measuring vehicles, has low running costs and maintenance costs, and is capable of using a straight ruler, water-based method, or transverse profilometer. We have been promoting the development of devices that do not require human labor or time, and are safe from traffic when taking measurements.

For example, a reference frame (e.g.,
We created a prototype measuring vehicle equipped with a measuring device that measures the distance to the road surface by moving the standard from side to side using electrical pulse signals and moving the standard from side to side using electrical pulse signals.

The left and right ends of the reference stand are foldable, and when expanded, it spans the width of the lane (approximately 3.sm).While moving the measuring device from one end of this expanded reference stand to the other, The distance from the vehicle to the road surface is measured in terms of lane width. As measuring devices, two methods were considered: a grounding method that uses a grounding wheel to measure distance by moving the grounding wheel up and down, and a non-contact method that uses laser light or ultrasonic waves.

However, when measuring the amount of ruts on the road surface for lanes, etc., please refer to the Road Maintenance and Repair Guidelines (published by the Japan Road Association).
Accordingly, the standard for measuring the amount of rutting is to measure the width of the lane so that it crosses the lane correctly, so the measuring device is moved from one end to the other on the reference stand like the measuring vehicle above. However, with measuring vehicles equipped with a mechanism for measuring the distance to the road surface, the only way to measure distances was to stop the measuring vehicle.

The present inventor has discovered that the amount of ruts on lanes of roads, etc. tends to continue uniformly. Furthermore, since the measurement distance interval for the amount of ruts is relatively long, even if the measuring vehicle described above is used to measure diagonally across the lane width, the measured value will be different from the conventional standard method (crossing the lane). (measure to cross correctly)
A good correlation was obtained with the measured values obtained by the method, and we inferred that it could be put to practical use.We measured the slope of the slope while driving the measurement vehicle on many lanes of the road, and at the same time, we measured the slope of the slope using the conventional standard method. We have also measured and compared the amount of rutting, and it has been confirmed that there is a very good correlation between them and that they are sufficiently reliable for practical use.

In this way, the method of the present invention could be established.

The method of the present invention will be explained below.

An overview of the measuring vehicle used to carry out the method of the present invention is as follows:
Shown in FIGS. 1 and 2. The measurement vehicle is of a type in which a mobile platform is towed by a vehicle. FIG. 1 is a side view of the measuring vehicle, and FIG. 2 is a rear view of the movable frame of the measuring vehicle as seen from the rear.

In the figure, (1) is a vehicle, and for example, a microbus, light van, passenger car, small truck, etc. can be used. (2) is a movable frame. A beam (4) is fixed to the rear part of the movable frame (2) via a support stand (3). Both sides of the beam (4) are foldable.

An unevenness sensor support stand (5) is mounted on the beam (4) so as to be movable left and right.

(6) is attached to the unevenness sensor support (5) by a pulley (slider) so that the unevenness sensor support (5) can move freely left and right on the beam (4). (7) is a servo motor for driving the unevenness amount sensor support base (5) left and right, and is mounted on the support base (3). (8) (8)... is a gear, which is arranged on the beam (4) and has a chain (9) stretched thereon, and is driven by a servo motor (accompanied by the chain (9) for rotation of force). A portion of the unevenness sensor support (5) is fixed to this moving chain (9), and as the chain (9) moves, the unevenness sensor support (5) rotates. is designed to move. (1 (I is a measuring wheel, which is supported by the unevenness sensor support stand (5) via bearing α11 so as to move up and down. az is a wheel for measuring displacement. The measuring wheel αυ bearing I
The measuring wheel (II) is installed in the measuring wheel (II) to measure the vertical movement. Also, az is a shaft, which fully supports the bearing αυ, and the shaft αJ is rotatably mounted on the unevenness amount sensor support stand (5) via the bearing Ull. The diameter of the measuring wheel αO needs to be somewhat large in order to allow the measuring wheel to run smoothly on the road surface, and it is better to exceed at least 20 crn.Actually, a diameter of 30 α is used. Unless the diameter is large enough, it will be difficult to measure while driving due to uneven road surfaces.

A5 is a mileage measuring wheel, which uses the support wheel of the movable pedestal (2), but a fifth wheel may be separately provided on the movable pedestal (2) and used. (+61 is an oscillator that emits a pulse signal. 07) is a trip counter, and QID
It is an ld controller. Controller Qe(d,
The servo motor (7) is fully activated at predetermined travel distance intervals based on the distance signal from the trip counter (17), and the unevenness amount sensor support (5) is fully moved. Also, the displacement amount from the displacement measuring device α2 is calculated and transmitted to the recorder α9.

The recorder α9 may be an XY recorder, or may be a data recorder capable of recording on a floppy disk or tape.

Moreover, an apparatus using these in combination may also be used. Distance signals and road surface unevenness signals can be recorded directly on magnetic tape, floppy disks, etc., or sent to an XY recorder, display, etc. through a computer such as a personal computer.
It can be output to a printer, etc. Since data processing is easy, it is also easy to calculate the amount of rutting and leveling. Furthermore, it is also easy to consider the measurement of adjacent lanes in a corresponding manner. Furthermore, the amount of ruts across the lane width can be plotted or integrated by an integrated wave kXY recorder or computer so that the lane width is divided into two, and the amount of ruts can be illustrated or integrated.

When measuring using a measuring vehicle, the vehicle travels along the lane at a uniform speed while emitting pulse signals at predetermined distance intervals, and moving the unevenness sensor support (5) left and right on the beam (4).
The vertical displacement of the measuring wheel α■ is measured by the displacement measuring device α2 and recorded on the recorder (l'l) through the controller 08.While the measuring vehicle is running, the amount of transverse unevenness of the road surface is measured. While the unevenness sensor support (5) moves from one end of the beam (4) to the other end ν times, the measuring vehicle moves forward, and the measuring wheel aO crosses the lane width diagonally. .

In this case, the measuring wheel (the wheel support rod extends obliquely so that the wheel 11 can run smoothly, and its bearing Ql) can be rotated by the shaft αJ.

There are two stopper switch rods on each end of the beam (4).
One to three of them are attached, and when the unevenness amount sensor support stand (5) reaches the position, it can be stopped automatically, and furthermore, the direction can be changed and driven. All these are controlled by controller aS.

The measurement results obtained by the method of the present invention and the conventional standard method (this
Next, we will explain the results of comparison with the measurement results obtained using the water-based method.

The running speed of the unevenness amount sensor support stand (5) of the measurement vehicle on the beam (4) can be varied, and the maximum speed is 2 m/sec.

In the embodiment of the method of the present invention, one holder for the unevenness amount sensor (5
), the traveling speed was f 1 m and 7 seconds.

The running speed of the measuring vehicle is 0 Km/h, 5 Km/h and 2
There were three speeds of 0 km/h. OK m/h means to stop and measure. Assuming that the width of the lane is f 3 m, at the speed of the measuring vehicle at 20 km/h, the measuring vehicle will travel approximately 16.7 m while the measuring wheel α0 crosses the lane width all times.

FIGS. 3 and 4 are plan views of one lane of a road, showing an overview of the measurement method and matching method of the method of the present invention and the standard method.

In the figure, a indicates a lane, and ml, m2, . . . indicate lines measured by the method of the present invention (hereinafter referred to as side lines).

Sl, S2, . . . indicate lateral lines according to the standard method.

In FIG. 3, the positions of the survey lines s0, s2, etc. according to the standard method pass through the center of the survey lines m□, m2, etc. according to the method of the present invention, so that they cross lane a correctly.

As shown in Fig. 4, the comparison is made by measuring lines Sn' and s according to the standard method so as to divide the side line according to the method of the present invention into three equal parts;
/ 2 was measured, and the average value was compared with the measured value (recorded on a recorder) of the measured value of the survey line mn according to the method of the present invention, which was measured corresponding to a position on a line that correctly crosses the lane width. An example of a measured value 'tXY recorder according to the method of the present invention is shown in FIG.

FIG. 5 is a cross-sectional view of the amount of rutting across the recorded lane width. In the figure, b is the measured cross-sectional shape line of the road surface. C is the base line of the road surface. Dl and D2 are the amount of rutting.

The amount of rutting between the method of the present invention and the standard method was compared using the following equation.

C=F(d)-D 5.C is the difference in the amount of rutting between the two measurement methods.
F (d) is the amount of rut created by the method of the present invention;
D is the amount of rutting (mm) determined by the standard method, and the larger value of D□ and D2 was taken. The measurement results (measurement distance interval 20 m) are shown in Table 1.

Table 1 Variable distribution of traveling speed and IcI V is the traveling speed of 0, 5, and 20 (Km/h) N is the degree or more, so when the traveling speed of the measuring vehicle is less than 20 Km/h,
The measured values of both measurement methods agree very well and can be put to practical use.

The above measurement results are just one example, but good correlations can be obtained for many roads and can be put to practical use.

Furthermore, since the measurement according to the method of the present invention can be performed while the vehicle is running, the measurement distance interval can be closely selected depending on the traveling speed.

Furthermore, if the traveling speed is reduced, the amount of road surface leveling can be accumulated practically.

In the example above, the amount of unevenness f on the road surface was input directly to the XY recorder, but it is also possible to record it on a floppy disk or magnetic tape and process it electronically to calculate the amount of ruts and leveling. You can also record the images. Then these't
It can also be input into an xy recorder.

Although the method of the present invention shows an example of a grounding method using a measuring wheel, results similar to those of the example can be obtained using a non-contact measuring system such as a laser beam method or an ultrasonic method. In the method of the present invention, the accuracy of measurement can be further improved by equipping the measuring device with a vibration meter to eliminate vibration errors and by improving the measuring device.

Although the method of the present invention is different from the standard measurement method as described above, the measurement results are within a practically acceptable range. According to the method of the present invention, labor and costs are significantly reduced compared to conventional methods, and safety is ensured.

Furthermore, the method of the present invention allows a measuring vehicle to be prepared relatively easily,
Since the measuring method is simple and the running and maintenance costs are low, it has excellent and beneficial effects, such as being widely applicable to road surveys in wide areas such as prefectural roads and municipal roads.

[Brief explanation of drawings]

Figures 1 and 2 show an overview of the measuring vehicle used to carry out the method of the present invention. Figure 1 is a side view of the measuring vehicle, and Figure 2 is a rear view of the movable frame of the measuring vehicle. It is. 3 and 4 are plan views of lanes showing an overview of the measuring method and matching method of the method of the present invention and the standard method. Fifth
The figure is a cross-sectional view of the amount of rutting across the recorded lane width. In the figure, 1... Vehicle 2... Moving frame 3... Support stand 4... Beam 5... Unevenness amount sensor support stand 6... Sliding wheel 7... Servo motor 8... Gear 9... Chain 10... Measuring wheel 11... Shaft Bearing 12... Displacement measuring device
13...Shaft 14...Bearing 1
5... Mileage measurement wheel 16... Transmitter
17... Trip counter 18... Controller 19... Recorder 20... Stopper switch a... Lane m... Side track S by the method of the present invention... Side track b by the standard method... The measured cross-sectional shape line C of the road surface is the base line of the road surface, and D is the amount of rutting.

Claims (1)

[Claims] A road surface unevenness measuring device is installed on a pedestal supported by the vehicle or a movable pedestal connected to the rear of the vehicle, and is equipped with a reference stand that extends in the lateral direction. A measuring car is equipped with a distance measuring wheel and a transmitter and recorder that synchronizes with the distance measuring wheel to emit an electric signal to start the road surface unevenness measuring device. The distance to the road surface is measured diagonally across the width of the lane by driving the road surface unevenness measurement device on the reference stand by the electric signal from the transmitter that is transmitted at each distance measurement interval of the lane as the vehicle travels. This system measures the amount of cross-sectional unevenness of a road surface, records these measured values on a recorder corresponding to the position of the lane width, and calculates the amount of ruts, etc. based on these measured values. How to measure.