Measuring and testing – Tire – tread or roadway – Tire inflation testing installation
Patent
1992-09-22
1994-02-22
Woodiel, Donald O.
Measuring and testing
Tire, tread or roadway
Tire inflation testing installation
342122, 348 85, G01N 1900
Patent
active
052877400
ABSTRACT:
The present invention provides a cavity examination method of a paved road which can examine cavities which are present under the paved road such as the asphalt-paved road in a reduced length of time. By collecting data of the structural conditions of areas under the paved road while traveling on the road by a pavement structure examination vehicle mounted with underground radar means, and scrutinizing according to the above results around the place which may contain a cavity by a pushcart type underground radar means, the cavity examination method of the present invention specifies presence and a planar extent of the cavity. If a cavity is actually detected, a hole with a small diameter is bored in the place and its inner circumferential wall is photographed by a camera to confirm the conditions of the cavity and the area under the pavement by a visual inspection in order to grasp the three dimensional conditions of the cavity.
REFERENCES:
patent: 4698634 (1987-10-01), Alongi et al.
patent: 4855820 (1989-08-01), Barbour
patent: 4899296 (1990-02-01), Khattak
patent: 5192953 (1993-03-01), Tomita
European Search Report for EP application EP 92 30-8655.7.
Geo Search Co., Ltd.
Woodiel Donald O.
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