 Display unit |
| OF THE PREFERRED EMBODIMENTS FIG. 1 is a top plan view of a race track and race track timing tower ... |
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| Work management method, management system and management apparatus suited to work sites |
| What is claimed is: 1. A work management method for work sites, comprising the steps of: detecting ... |
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| Vehicular navigation system |
| Accordingly, in order to improve upon the present state of this technology, the present invention ... |
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| Extended brake switch software for vehicle stability enhancement system |
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| Vehicle-mounted information processing apparatus having magnetic disk device |
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| Navigation with multimedia |
| In the FIGURE, a navigational device 1 according to an example embodiment of the present invention ... |
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| Beat analysis of musical signals |
| Overview The following discussion is directed to a system that analyzes music to detect the beat ... |
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| Route generating device |
| A first object of this invention is to provide a route generating device capable of generating a ... |
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| Vehicle navigation system |
| OF THE PREFERRED EMBODIMENTS Hereinafter, an example of the present invention will be described in ... |
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Vehicle for evaluating properties of road surfaces
| Details |
Inventors: Shoutaro, Kato; Tatsuhide, Nakane; Tetsuo, Ogiwara;
Assignee: Kokusai Kogyo Co., Ltd. (Tokyo, JP)
Primary Examiner: Groody; James J.
Assistant Examiner: Kostak; Victor R.
Attorney, Agent or Firm: Schwartz, Jeffery, Schwaab, Mack, Blumenthal & Evans
The invention provides a vehicle for evaluating the properties of road surfaces wherein a road surface cross-section profile evaluating means, a crack-evaluating means, and a road surface longitudinal profile evaluating means are mounted on a predetermined vehicle. The measuring intervals of the respective means can be controlled in accordance with a signal from a single speedometer/range finder. Three kinds of road surface property values which are matched with each other can be obtained. Even if the evaluation system (evaluation vehicle) and the object system (road surface) have a relative speed, the road surface property values can be accurately determined irrespective of the relative speed. Therefore, accurate and reliable evaluation data can be obtained, and the vehicle can cope with high speed and heavy traffic. |
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DETAILED DESCRIPTION It is, therefore, a main object of the present invention to provide a vehicle for evaluating the properties of road surfaces, which resolves the problems with the conventional techniques, can cope with heavy and high-speed traffic on modern roads, can automatically and reliably evaluate cracks, ruts, and the longitudinal section profile of road surfaces upon one-time travel of the vehicle thereon, can control measurement of three different properties with a single speedometer/range finder, and can output matched evaluation data.
A vehicle according to the present invention comprises a cross-section profile evaluating means for evaluating ruts and other road properties and having the arrangement to be described below, a crack-evaluating means, and a longitudinal section profile-evaluating means for evaluation with reference to altitude, wherein the respective means can perform evaluation based on a signal from a single vehicle speedometer/range finder.
With the vehicle of the above arrangement, even if measurements by the respective means are individually performed, respective evaluation data can be matched, and subsequent analysis processing is facilitated.
The present invention therefore provides, for the first time, a vehicle for accurately evaluating the overall properties of road surfaces.
Various members used for the respective evaluating means, e.
g.
, a CCD camera, an optical level meter, a film camera, and the like are effectively arranged on front and rear portions of the evaluation vehicle and the vehicle base.
Accordingly, the present invention provides a single vehicle which can evaluate three different kinds of properties of road surfaces upon one-time travel of that vehicle on a road surface.
In order to achieve the above object of the present invention, the road surface cross-section profile evaluating means has a CCD camera which is arranged at the rear or front portion of the vehicle and receives a reflected beam from the road surface irradiated with a fan laser beam
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Navigation and GPS 
