JPH02136404A - Detector of subbase swelling condition - Google Patents

Abstract

PURPOSE:To detect accurately the swell of a subbase by detecting a height of the subbase by a road height detector, and correcting the value to be detected by a height detector based on the values to be detected by an acceleration detector and an inclination detector to obtain a corrected height of the subbase. CONSTITUTION:A running distance detector 7 is mounted to a running car's body 1, a bearing member 8 extending to the reference plane of a subbase 5 in parallel is mounted to the front thereof, and five height detectors 9a - 9e are mounted to the lower plane thereof at specific intervals. An acceleration detector 10 to detect longitudinal acceleration of the body 1 and an inclination detector 11 to detect an inclination against the reference plane of the body 1 are mounted to the upper surface of the bearing member 8. A height to be detected by a height detection means based on an acceleration to be detected by the acceleration detector 10 and an inclination to be detected by the inclination detector 11 is corrected at a vertical position to obtain a height of the subbase 5. After that, the swell of the subbase 5 is calculated through an operation device by means of the running distance to be detected by a running distance detector 7.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a detection device for detecting the undulation state of a roadbed.
In particular, the present invention relates to a roadbed undulation state detection device used in asphalt finishers and the like that pave roads.

(Prior Art) Generally, when paving roads, a leveling device such as an asphalt finisher is used.

With this asphalt finisher, while the vehicle is running, the paving material (asphalt) in the hopper is sent to the rear spretting screw by the bar feeder, the asphalt is supplied to the roadbed by the spretting screw, and this asphalt is transferred to the screed arm. The floor is leveled with a screed suspended from the rear end.

By the way, when paving a road, it is necessary to maintain the pavement thickness at a predetermined thickness (design value), and it is also necessary to make the paved surface flat.

For this reason, conventionally, a worker (sickness man) different from the worker operating the asphalt finisher was required to
The thickness of the pavement is checked by inserting a gauge rod into the leveled surface.

By the way, when the sickness man checks the pavement thickness,
Measures the difference between the target pavement thickness and the actual pavement thickness, and also measures the undulations of the roadbed in the direction in which the asphalt finisher moves!
It is necessary to measure Fs (roadbed unevenness state).

(Problem to be solved by the invention) However, does the thickness man measure the difference between the target pavement thickness and the actual pavement thickness? In the case of #1, the difference in pavement thickness can be confirmed relatively easily with a gauge rod, but the measurement of the state of roadbed undulation in the direction of movement of the asphalt finisher relies on visual observation by a thickness man. For this reason, there is a problem in that the error due to the skill level of the thickness man is extremely large (as a result, the paved surface cannot be leveled and the quality of the paving deteriorates).

An object of the present invention is to provide a roadbed waviness detection device that can accurately detect roadbed waviness.

(Means for Solving the Problems) According to the present invention, there is provided a traveling vehicle body, one end of which is rotatably attached to the traveling vehicle body, and which is rotatable in a direction perpendicular to the traveling direction of the traveling vehicle body. Used in a leveling device having a screed arm and a screed which is rotatably attached to the screed arm and spreads paving material on the roadbed to form a paved surface. a plurality of height detection means attached at intervals to detect the height of the running vehicle body and the roadbed; a running distance detection means for detecting a mileage of the running vehicle body; and a plurality of height detection means attached to the running vehicle body; an acceleration detecting means for detecting acceleration of the traveling vehicle body in the vertical direction; an inclination angle detecting means attached to the traveling vehicle body and detecting an inclination angle of the traveling vehicle body with respect to a preset reference plane; The vertical position of the height detecting means is corrected based on the detected acceleration from the acceleration detecting means and the detected inclination angle from the inclination angle detecting means, and the detected height of the height detecting means is adjusted in the corrected vertical direction. A roadbed undulation state detection device is obtained, comprising: calculating means for calculating the undulation of the roadbed by correcting the height of the roadbed by correcting it based on the position, and calculating the undulation of the roadbed using the detected traveling distance of the traveling distance detecting means. .

(Function) In the present invention, the roadbed height is detected at a plurality of locations by a plurality of height detection means attached to the traveling vehicle body at predetermined intervals. The calculating means corrects the vertical position of the height detecting means based on the vertical acceleration of the traveling vehicle body detected by the acceleration detecting means and the tilt angle of the traveling vehicle body detected by the tilt angle detecting means. The corrected roadbed height is determined by correcting the detected roadbed height. Further, the calculation means calculates the undulation of the roadbed using the corrected roadbed height and the travel distance detected by the travel distance detection means. This calculated undulation state of the roadbed is displayed as necessary. In this way, by determining the waviness of the roadbed, the roadbed can be paved in accordance with the waviness of the roadbed, and the paved surface can be maintained flat.

(Example) The present invention will be explained below with reference to Examples.

First, referring to FIGS. 1 and 2, one end (front end) of a pair of screed arms 2 is pivotally connected to both end surfaces of a traveling vehicle body 1 of an asphalt finisher, and as a result, the screed arms 2 are It is rotatable around this pivot point 2a in the vertical direction with respect to the traveling direction of the traveling vehicle body 1. Further, a screed 3 is attached to the other end (rear end) of the screed arm 2 and is rotatable in the vertical direction with respect to the traveling direction of the traveling vehicle body 1.

As mentioned above, this asphalt finisher feeds the asphalt in the hopper (not shown) to the rear spretting screw (not shown) using the bar feeder (not shown) while the traveling vehicle body 1 is running. , the asphalt 4 is supplied to the roadbed 5 by this screed, this asphalt 4 is laid flat with a screed, and the paved surface 6 is
is formed.

Referring also to FIG. 3, the traveling vehicle body 1 is equipped with a traveling distance detector 7 for detecting the traveling distance of the traveling vehicle body 1. Further, a support member 8 extending parallel to the reference plane of the roadbed 5 is attached to the front end of the traveling vehicle body 1, and five height detection sensors are mounted on the lower surface of the support member 8 at predetermined intervals. vessel(
Ultrasonic sensor) 9 a , 9 b , 9 c , 9
ds and 9e are attached. The height detectors 98 to 9e detect the distance between the roadbed and the support member 8, that is, the traveling vehicle body 1 (hereinafter, the distance between the roadbed and the support member 8 is simply referred to as the height of the vehicle body). Support member 8
An acceleration detector 10 for detecting acceleration of the vehicle body 1 in the vertical direction, that is, the vertical direction, is attached to the top surface, and an inclination angle detector for detecting the angle of inclination of the vehicle body 1 with respect to the above-mentioned reference plane. 11 is attached. The operation panel 1a of the asphalt finisher is equipped with a calculation device 12 including a display device. This calculation device 12 includes a mileage detector 7, a height detector 9a to
9e, an acceleration detector 10, and a tilt angle detector 11 are connected.

Here, with reference also to FIGS. 4, 5, and 6, the traveling direction of the traveling vehicle body 1 is the X direction, the width direction of the roadbed 5 is the X direction,
and the vertical direction as two directions, the height of the roadbed 5 at point xn is the height of the ultrasonic sensors 9 a , 9 b , 9
c, 9ds, and 9e, and these detected roadbed heights are input to the calculation device 12. Here, the heights of the roadbed 5 detected by the ultrasonic sensors 9a, 9b, 9c, 9d, and 9e are h+ h2, hi, respectively.
, h4 and more.

shall be.

On the other hand, the acceleration detector 10 detects the acceleration corresponding to the roadbed undulation at point Change is required. Further, the inclination angle θ of the support member 8 corresponding to the roadbed undulation at the point X is detected by the inclination angle detector 11 and inputted to the arithmetic unit 12 manually. The arithmetic unit 12 calculates each ultrasonic sensor 9a based on the detected inclination angle θ and the first change.

9b, 9c, 9ds and 9e are installed at positions s1 and S2
% 83.84, and the displacement in two directions of S, i.e. the second
Learn about changes in Then, the arithmetic unit 12 corrects the heights of the roadbed 5, , h2, h, , h4, and the heights of the roadbed 5 based on the second change to obtain corrected roadbed heights HH2, H, , H4, and H.
Find 5.

Thereafter, in the same manner, depending on the traveling distance of the traveling vehicle body 1 detected by the traveling distance detector 7, that is, the traveling position ii! X
, -1X, -2, X5-i , wanted,
For example, actual undulations of the roadbed are displayed on the display device 13 as shown in FIG.

Note that in order to obtain a large number of x-y-z coordinate values for the corrected roadbed height, it is necessary to increase the number of ultrasonic sensors.1. The number and spacing of ultrasonic sensors can be changed as necessary.

(Effects of the Invention) As explained above, in the present invention, the height of the roadbed is detected by a plurality of road surface height detectors, and the detected acceleration from the acceleration detector and the detected inclination angle from the inclination angle detector are used. Based on this, the vertical position of the height detector is corrected to obtain the corrected roadbed height, and the waviness of the roadbed is calculated and displayed based on this, so that the waviness of the roadbed can be accurately determined.

Therefore, it becomes easier for the sickness man to flatten the pavement surface, and the quality of the pavement can be improved.

Sleeping day

[Brief explanation of the drawing]

1, 2, and 3 are views showing an embodiment of a leveling device using the roadbed waviness state detection device according to the present invention, and FIG. 4 is a diagram showing an embodiment of the leveling device using the roadbed waviness state detection device according to the present invention. The block diagrams shown in FIGS. 5 and 6 are diagrams for explaining calculation of the roadbed undulation state. 1... Traveling vehicle body, 2... Screed arm, 3...
・Screed, 4... Asphalt, 5... Roadbed,
6... Paved surface, 7... Mileage detector, 8... Support member, 98-9e... Ultrasonic sensor 10...
Acceleration detector, 11... Tilt angle detector, 12... Arithmetic device. Figure 3 Figure 1 Figure 2 Figure 5 Figure 6

Claims (1)

[Claims] 1. A running vehicle body, a screed arm rotatably attached at one end to the running vehicle body and rotatable in a direction perpendicular to the traveling direction of the running vehicle body, and a screed arm rotatably attached to the screed arm. The screed is used in a leveling device that spreads paving material on a roadbed and has a screed that forms a paved surface, and is attached to the traveling vehicle body at predetermined intervals, and is connected to the traveling vehicle body and the roadbed. a plurality of height detecting means for detecting height; a traveling distance detecting means for detecting the traveling distance of the traveling vehicle body; and a plurality of height detecting means attached to the traveling vehicle body for detecting the acceleration of the traveling vehicle body in the vertical direction. an acceleration detecting means; a tilt angle detecting means attached to the traveling vehicle body for detecting a tilt angle of the traveling vehicle body with respect to a preset reference plane; and a detected acceleration from the acceleration detecting means and the tilt angle detecting means. correcting the vertical position of the height detecting means based on the detected inclination angle from the angle of inclination, and correcting the detected height of the height detecting means with the corrected vertical position to determine the height of the roadbed; A roadbed waviness state detection device, comprising: arithmetic means for calculating waviness of the roadbed using the detected travel distance of the travel distance detection means.