JPS5991202A - Method and apparatus for discriminating shape and strength of road - 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] This invention relates to a ring drive wheel (gyrosc
op) and an optical device that works in conjunction with this to simultaneously calculate the amount of road surface subsidence based on electrical charges during the measurement of gradients, ruts, and road strength in both the longitudinal and cross sections of the road. The present invention relates to an improved method and apparatus for easily determining these conditions.

In detail, it is a ring drive mechanism, and the beam body is always maintained horizontally or in a horizontal direction corrected by calculation, and each light emitting source is provided at a certain angle of inclination, and the light is emitted from each straight line and parallel. Each projection point (irradiation point) obtained when the beam is irradiated onto the road surface is captured by the vehicle's photoreceptor, and the shape of the road to be measured can be easily and accurately determined by adding ordinary calculation means. This relates to the above-mentioned method.

As is generally known, after a road is completed or after a certain period of time has elapsed, even if the road is paved and its vertical and horizontal slopes are distorted due to overlapping loads, cracks, ruts, etc. .

Therefore, such disturbances must not be measured and corrected.

Although many detection and measurement methods have been proposed in the past for the effective maintenance of roads, the actual inspection methods using various methods cannot eliminate the influence of inaccuracies derived from the horizontal and vertical vibrations of the measuring vehicle itself. In addition, both the longitudinal and lateral gradients of the road to be measured can only be measured by separate means, which impedes implementation efficiency.

Other deficiencies of conventional means include, for example, the use of profile meters for slope inspection and the use of Beckelmann beams for intensity determination, both of which require road closures or non-contact thickness measurements. As a result, the measurement range and accuracy are not met.

Therefore, it is an object of the present invention to enable the above-mentioned measurement to be carried out easily even when the vehicle width speed during measurement exceeds 30 bl/hour based on the above-mentioned dedicated device, and to eliminate the conventional defects.

Embodiments of the present invention will be described below with reference to the drawings.

A beam body integrally fixed with a Gyro-cope mechanism 1 via a support frame 6 protruding from an appropriate location on the outer rear or side surface of the vehicle 5 shown in FIGS. 1 to 3 or the back surface of the vehicle 5. Hang 2. Support frame 6
Fi may be attached to the front of the vehicle (not shown). In this case, the beam body 2 can be rotated in the vertical direction via the universal angler 3.

Next, a certain deviation angle θ, θ,...
Two or more light emitting sources 2', 2', etc. are fixedly installed and are located in the transverse axis direction of the beam body 2, causing oblique and mutually parallel light emitted from these light sources when the device is operated. Are the straight beams γ, γ... (Fig. 4) on the road surface? - each irradiation point γ1, r, . . . is formed at (FIG. 4). On the other hand, it is necessary to provide support (
7) The photoreceptor 4 of the device consists of a video or image sensor or a camera for immediately capturing the light at the said point of illumination.

As mentioned above, the main parts for carrying out the method of the present invention are installed in the vehicle 5.
If the road at the time of measurement is horizontal, the G-
If it is assumed that the irradiation points γ3. The interval for each span of γ,... is,
One light emitting source 2' is equidistant from the next light emitting source 2' in one section y, and if the road surfaces G and L have certain irregularities or slopes, causing a height difference H in the cross section, then this A plurality of irradiation points γ3. γ, between...
The lateral line length formed from Σ (total) of each span moves in the lateral direction of the road surface G' according to the amount of change (H) of unevenness, etc. on the road surface G'.

That is, two or more irradiation points γ8. Since the total length connecting γ, . . . changes in the lateral direction, this change is captured by the photoreceptor 4.

The above-mentioned action will be explained more clearly (let's make it double). Now let's consider the light emitting sources 2', 2' for the hypothetical road surface GL or 0' in Fig. 4.
The projection angle of . r...
. . is the distance to the measurement target point in the lateral direction.

The apparent amount of movement that can be captured by photoreceptor 4 is 8
Then, the following formula holds true.

Here, H is the height difference (change amount) mentioned above (X+S
) is the actual amount of horizontal movement of the light spot, so the following correlation can be derived.

5-tanθ, 8-L.

The value of the abrasion relationship can be easily calculated using an ordinary calculator.

In this way, each arbitrary irradiation point γ1. γ.

. . . The amount of settlement based on the vertical and transverse slopes, ruts, and loads described above can be determined using H with reference to H between them or any of the irradiation points γ.

Next, as in the embodiment shown in FIG. 5, there are two or more photoreceptors 4, and the inclined surfaces θ1, . . . of the light emitting sources 2', 2', . θ.

Even if . It becomes clear from

Thus, according to method implementation C2 of the invention, the above-mentioned objects are achieved and it is also possible to measure roads with several lanes in -1 trip of the measuring vehicle.

[Brief explanation of the drawing]

Figure 1 shows the equipment arrangement for measuring the transverse gradient and ruts on the road surface, and Figure 2 shows the longitudinal gradient.
Figure 3 is a similar layout diagram for measuring the amount of blood subsidence during a load test on a paved road surface, etc.; Figure 4 is an explanatory diagram of the action of the present invention; Figure 5 shows the procedure for measuring the lane in which the vehicle is traveling and the adjacent lane. T...One tire of the measuring vehicle Patent applicant: Tokyo Road Engineers Co., Ltd. Figure 3, Figure 5

Claims (1)

[Claims] 1) In the means for identifying conditions such as road gradient, a light emitting source pivotably supported on a beam body of a vehicle that always maintains a horizontal direction or a calculated horizontal direction while the measuring vehicle is traveling. An arbitrary number of parallel and straight beams are projected toward the road surface from each beam at a certain deviation angle θ, which is captured and recorded by the vehicle's photoreceptor at the irradiation point on the road surface, and records the vertical and horizontal gradients and ruts of the road. A method for determining the condition of a road to be measured that allows calculation of the amount of subsidence, etc. for trenching and strength determination simultaneously or separately. 2) Each of the inclined light emitting sources of the beam body, which is suspended on the measuring vehicle and can always travel in the horizontal direction or the calculated horizontal direction, 3) Road condition determination method according to item 1, in which the deviation angle θ1 of each beam light in the horizontal direction of the irradiation point is an arbitrary angle, and the received light is allowed to be captured at a plurality of positions when captured by the light receiving body 3) Road slope In the identification means of the same state, a ring drive wheel mechanism suspended vertically rotatably outside the measuring vehicle via a support frame and a beam body provided and a beam body attached at an angle to the beam body. A road condition discriminating device comprising: each light emitting source; and one or more photoreceptors that detect the irradiation point of the light emitted around the vehicle. 4) The road condition determining device according to item 3, characterized in that the beam body can be supported on either the side surface or the rear surface of the vehicle to be measured.