JPH0735522A - Method of measuring profile of cross-section of paved road surface with the use of laser - Google Patents

Abstract

PURPOSE:To provide a method of measuring a profile of the cross-section of a paved road surface, which can be safely and simply carried out with a high degree of accuracy. CONSTITUTION:In a method of measuring a profile of the cross-section of a paved road surface, laser beams are directed onto a paved road surface 1 from a predetermined position on one side part of the paved road with the use of a laser oscillating device 3, and are spotted on a line crosswise of the paved road surface 1 so as to form a visual light cut-section. Further, a horizontal angle and a depression angle of the light cut-section o the paved road surface at a measuring point, from a position in the normal direction with respect to the light cut-section with the use of an angle measuring device 4, from a second predetermined position on the side part of the paved road surface which is remote from the first predetermined position by a predetermined distance. Thereby, the crosswise shape of the paved road surface are calculated from the predetermined distance, the horizontal angle and the depression angle, and are displayed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paved road surface cross-profile measuring method for measuring the cross-sectional shape of a paved road surface such as a general road and a national highway.

[0002]

2. Description of the Related Art In general roads, high-speed national roads, etc., rutting on paved road surfaces has become a problem due to the increase in size and weight of vehicles accompanying the increase in traffic volume. Particularly, as a technique for measuring a rut on a road surface while a vehicle is traveling (in service), there are a non-contact method and a contact method.

As a non-contact method, a special measurement vehicle is used for measurement. However, the special measuring vehicle is low in efficiency because it can measure only one lane at a time.

On the other hand, as a contact method, traffic regulation is applied and rutting is measured by a profile meter or leveling by a level, and the danger, a lot of labor, and a time limitation due to the traffic regulation are imposed.

[0005]

In order to solve such a problem, it is conceivable to use a laser beam of the line irradiation method which is used in the conventional non-contact method, but a light cutting surface is formed in the daytime. If it has a sufficient output, it may affect the human body and cannot be used as it is on a general road because of safety and health problems for traveling vehicles and measuring personnel.

Therefore, even if a laser beam is used to measure the cross-sectional shape of a paved road surface such as an expressway, it must be able to solve all the following problems. (1) It is easy to handle and can be measured from outside the road. (2) There are no traffic restrictions when measuring. (3) One measurement distance can cover three lanes (about 10.5 m). (4) The measurement accuracy of the relative height of ruts should be within 2 mm. (5) The safety of using the device during measurement is ensured.

It is an object of the present invention to provide a method for measuring a paved road surface profile profile capable of solving all the above-mentioned problems.

[0008]

A method of measuring a paved road surface crossing profile according to the present invention is a method of measuring a paved road surface from a predetermined position on a side portion of the paved road surface toward a paved road surface by using a laser oscillator equipped with a light concentrator. A laser beam is radiated in a crosswise direction on a line or a point to form a light cutting surface, and an angle measuring device is used to measure the light on the paved road surface from a point normal to the light cutting surface. It is characterized in that the horizontal angle and the depression angle of the measurement point on the cut surface are measured, and the shape in the transverse direction of the paved road surface is calculated and displayed based on the fixed distance between the devices and the horizontal angle and the depression angle.

[0009]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

FIG. 1 of the accompanying drawings is a schematic view showing a method for measuring a paved road surface profile profile according to the present invention. In order to carry out the method for measuring the paved road surface profile of the present invention, three devices are mainly required. That is, the laser oscillating device 3 with the focusing device and the angle measuring device 4
And a personal computer.

First, the laser oscillating device 3 with a light concentrating device will be described. This device 3 is a device for forming a light cutting surface on the paved road surface 1 for which rutting is to be measured, and will be described later. In the present embodiment, a He-Ne laser having a wavelength of 630 nm is included among the lasers in the visible wide range, and the laser is within an angle range of 0 ° to about 85 ° with respect to the vertical direction with respect to the paved road surface 1. Laser beam can be emitted.

Next, the angle-measuring device 4 will be described. The device 4 is a measuring point (laser brilliance trace) on the light cutting surface formed on the paved road surface 1 by the above-described laser oscillating device 3 with a condenser. 5) An apparatus for collimating P from one point in the direction normal to the light cutting surface by a collimating telephoto lens and measuring the horizontal angle and the depression angle with reference to the direction normal to the light cutting surface.

The personal computer is operated by a measurer and operates in accordance with the calculation / display procedure of the cross-sectional shape to perform calculation based on the measured values of the horizontal angle and the depression angle measured by the side angle device 4 described above. Then, the shape in the transverse direction of the paved road surface is calculated and displayed.

FIG. 2 of the accompanying drawings is a view for explaining the measuring principle of the method for measuring a profile on a paved road surface according to the present invention. Hereinafter, the measurement principle of the present invention will be described with particular reference to FIG.

First, in FIG. 2, reference numeral E is the same as in FIG.
As shown in FIG. 3, a laser oscillator device 3 with a light concentrating device is arranged at a predetermined position on the road shoulder 2 on the side of the paved road surface 1 to be measured.
The laser oscillation point from is shown. As shown in FIG. 1, reference numeral V indicates a shoulder 2 on the side of the paved road surface 1 to be measured.
8 shows an observation point by the angle measuring device 4 arranged at a position separated from the laser oscillating device 3 with the condenser by a predetermined distance. The reference symbol P indicates a measurement point on the paved road surface 1.

Similarly, the reference symbol L is the horizontal distance between the observation point V and the light cutting plane F formed on the paved road surface 1 by the laser oscillating device 3 with the light concentrating device, and Ho is the height standard. Is an arbitrary point on the road shoulder 2, αο is a horizontal angle formed by the foot G of the perpendicular line from the observation point V to the light cutting plane F and an arbitrary point which is the height of the road shoulder 2, αp is the observation point V The horizontal angle when the measurement point P on the road surface 1 is viewed from the observation point V when the foot G of the vertical line is used as the reference azimuth, and βο is the horizontal angle when the arbitrary point Ho that is the height reference is viewed from the observation point V. Depression angle, βp is the observation point V
The depression angle when the measurement point P on the road surface 1 is seen from, ho is the height on the road shoulder 2 which is the height reference, and hp is the height of the measurement point P on the road surface 1, respectively.

In the present invention, as shown in FIG. 2, the laser beam is normal to the light cutting plane F formed by irradiating the laser beam in the direction including the vertical direction, and the horizontal distance L is known. By measuring the angle (horizontal angle and depression angle) which faces each point on the light section plane from the observation point V, elevation calculation is performed and the cross-sectional shape is calculated and displayed.

The height reference for performing such height calculation is the point Ho on the arbitrary road shoulder on the light cutting plane F. The height ho of the road shoulder point Ho, which is the reference height, is the horizontal angle αο from the observation point V, the depression angle βο, and the horizontal distance L to the light cutting plane.
Then, it is calculated by the following calculation formula.

Ho = L / cos (αο) × tan (βο) ... Equation 1

Further, a measurement point P on the road surface 1 on the light section F
Of the horizontal angle αp from the observation point V and the vertical angle β
The angle of p is measured and calculated by the following calculation formula.

Hp = L / cos (αp) × tan (βp) ... Equation 2

Therefore, the relative height Δh of the measurement point P on the road surface 1 on the light-section surface when ho is used as the height reference is obtained as the difference between ho and hp as shown in equation 3. be able to. By providing an appropriate number of measurement points to represent the transverse shape of the light-section surface on the road surface 1, by linking each measurement point from an arbitrary point on the road shoulder 2 serving as a height reference, the paved road surface The transverse shape on 1 can be displayed.

Δh = ho-hp Equation 3

As described above, the feature of the optical cutting method which is the measuring principle of the present invention is that an arbitrary point on the road shoulder, which is a height reference, is set on an arbitrary transverse line for measuring the transverse shape, and an arbitrary point on the line is determined. It is possible to obtain the relative height of the cross-sectional shape on the road surface to be measured by installing a laser oscillator with a condenser at a position and installing an angle measuring device at an arbitrary position not on the line. .

Next, details of the apparatus used to carry out the measuring method of the present invention will be described. First, the laser oscillation device with a light concentrator will be described. The laser used in the present invention must be capable of being visually collimated by a measurer and capable of measuring a distance of up to 10.5 m under daytime sunlight. . Therefore, in the present invention, it is preferable to use a laser having a wavelength in the visible light region as a laser that can be collimated visually.

Daytime sunlight has a very high radiant energy for each wavelength including the visible light range, and the amount of energy per unit area of laser irradiation must be increased by increasing the laser output. . However, increasing the laser output satisfies the laser output and energy amount of class 2 or less that satisfies the control value (maximum allowable exposure amount) of the laser irradiation exposure to the human body for safety and health defined by JIS. I can't.

(1) The laser irradiation method is a dot-shaped or laser-driven method in which a laser beam of class 2 or less is driven to rotate in the vertical direction within an angle range of 0 ° to about 85 °. A method of moving a point on a line is used.

(2) A condensing device is used for narrowing down the spread of the laser irradiation angle by using a condensing lens according to the measurement distance.

(3) The beam diameter of the laser beam is determined so that the amount of irradiation energy on the front surface of the condenser lens is class 2 or less.

Next, the angle-measuring device will be described. The angle-measuring device used in the present invention is a collimating telephoto lens for collimating a measurement point on the light-section plane and a direction normal to the light-section plane. And a angle measuring unit for measuring the horizontal angle and the depression angle. The measurement error of the depression angle by this angle measuring device is the above-mentioned formula 1 and formula 2 for obtaining the height of each measurement point.
It has a great influence on the accuracy of the calculation result of. For example, the relationship between the measurement error of the depression angle and the measurement accuracy of the height when the measurement transverse width is 10.5 m is shown in the table of FIG. As can be seen from the table of FIG. 4, in order to achieve the target measurement accuracy of 2 mm of the present invention, it is necessary to use an angle measuring device capable of ensuring an angle measurement accuracy of 30 seconds or less.

Finally, the personal computer used for calculating / displaying the cross-sectional shape and the calculation / display procedure will be described. According to the calculation / display procedure used in the present invention, as shown in the float chart of FIG. 5, a measurer operates the keyboard of the personal computer to observe the horizontal distance L in step 10 and the horizontal distance L in step 11. The horizontal angle αο and the depression angle βο formed by the foot G of the perpendicular line measured from the point V on the light-cutting surface F on the light-cutting surface F and an arbitrary point serving as a reference of the height on the road shoulder 2, and the light-cutting in step 12 are performed. N road surfaces 1 on surface F
By inputting a horizontal angle αp (1 to n) and a depression angle βp (1 to n) formed by the above measurement point and an arbitrary point serving as a reference of the height on the road shoulder 2, the horizontal angle is changed in step 13 from the horizontal angle. The horizontal distance from the arbitrary point on the road shoulder 2 to the measurement point is calculated as the height reference, and in step 14, the reference height ho from the depression angle and the height hp (1 to n) of each measurement point are calculated. By obtaining, the relative height (Δh (1 to n)) of the measurement point on the road surface 1 can be calculated in step 15. Further, based on the calculation results up to step 15, in step 16, the relative height for an arbitrary point on the road shoulder 2 which is the height reference for each measurement point on the road surface 1 is plotted and developed, whereby the pavement is paved. The shape of the rut in the transverse direction of the road surface is calculated and displayed in step 17 on the display of the personal computer. FIG. 6 shows an example of a display image of the rutted shape thus displayed on the display.

[0032]

According to the pavement crossing profile measuring method of the present invention, it is possible to measure the crossing shape of the paved road surface from the shoulder without daytime traffic regulation except when traffic is congested in consideration of safety for the driver. .

[Brief description of drawings]

FIG. 1 is a schematic view showing a method of measuring a paved road surface crossing profile measuring method according to the present invention.

FIG. 2 is a diagram for explaining the measurement principle of the paved road surface cross-profile measurement method of the present invention.

FIG. 3 is a schematic view showing a specific example of a laser oscillation device used to carry out the method for measuring a paved road surface profile according to the present invention.

FIG. 4 is a diagram showing a table exemplifying the relationship between the measurement error of the depression angle and the measurement accuracy of the height by the angle measuring device used for implementing the paved road surface cross-profile measurement method of the present invention.

FIG. 5 is a diagram showing a flow chart showing a calculation / display procedure by a personal computer used for carrying out the method for measuring a paved road surface cross-sectional profile of the present invention.

FIG. 6 is a diagram illustrating a display image of a cross-sectional shape displayed on a display of a personal computer as a measurement result by the paved road surface cross-profile measurement method of the present invention.

[Explanation of symbols]

 1 Pavement road surface 2 Road shoulder 3 Laser oscillator with condensing device 4 Angle measuring device 5 Laser trace 31 Mounting table 32 Laser emitting part 33 Rotation drive part 34 Angle control stopper 35 Engaging piece E Laser oscillation point V Observation point P Measurement point F Light cutting plane G Feet of perpendicular line from observation point V to light cutting plane F

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Rito Asahi 31-19, 5-19 Hirado, Totsuka-ku, Yokohama-shi, Kanagawa Corp. Shinbayashi 101 (72) Inventor Takashi Terahara 2569-2, Ohzenji, Aso-ku, Kawasaki-shi, Kanagawa 143 (72) Inventor Satoshi Izumi Niigata City, Niigata Prefecture 4 7-2 211 (72) Inventor Nobuyuki Mizutani Shinjuku-ku Shinjuku-ku, Tokyo 2-18 Shinjuku Kofu Building Asia Air Survey Co., Ltd. (72) Invention Author Kiichi Hirono Shinjuku-ku, Tokyo Shinjuku-ku, Tokyo 4-18 Shinjuku Kofu Building Asia Air Survey Co., Ltd. (72) Inventor Kazuo Oda Shinjuku-ku, Tokyo Shinjuku-ku Shinjuku Kofu Building Asia Air Survey Co., Ltd. ( 72) Inventor Minoru Komiya 4-2-18 Shinjuku, Shinjuku-ku, Tokyo Inside Shinjuku Kofu Building Asia Air Survey Co., Ltd. (72) Inventor Katsumi Otsuka 3-1-1 Yushima, Bunkyo-ku, Tokyo No. Tokyo road engineers in the Corporation

Claims (3)

[Claims] 1. A paved road surface (1) is obtained from a predetermined position on a side of the paved road surface (1) by using a laser oscillator (3) with a light concentrator.
Irradiate a laser beam in the shape of a spot or a point in a line in the transverse direction of the paved road surface (1) toward the top to form a light cutting surface (F),
Using the angle-measuring device (4), the measurement point of the light cutting surface on the paved road surface (1) from one point in the direction normal to the light cutting surface (F)
Measure the horizontal angle and depression angle of (P),
A method for measuring a profile crossing a paved road surface using a laser, characterized in that the shape in the transverse direction of the paved road surface (1) is calculated and displayed based on the horizontal angle and the depression angle. 2. A laser oscillating device (3) with the condensing device
The method for measuring a paved road surface profile using a laser according to claim 1, wherein the laser comprises a laser having a wavelength in the visible light region. 3. A laser oscillating device (3) with the condensing device
Is capable of irradiating a laser beam within an angle range of 0 ° to about 85 ° with respect to the vertical direction.
Alternatively, the method for measuring the profile crossing the pavement road surface using the laser described in 2.