Television – Special applications – Hazardous or inaccessible
Patent
1991-09-30
1994-03-29
Boudreau, Leo H.
Television
Special applications
Hazardous or inaccessible
73151, 324338, 364422, 382 1, H04N 718, G06K 900
Patent
active
052989879
ABSTRACT:
Method for investigating the ground structure of a paved road which requires only a small diameter boring for direct observation of the ground structure. The method comprises a step of boring an investigation hole with a small diameter which reaches at least a sand layer of a roadbed, penetrating a paved floor of said paved road, a step of cleaning an inside of said investigation hole which is bored by said boring step, a step of photographing in said investigation hole which has been cleaned by said cleaning step, said photographing step photographing an overall surface of an inner circumferential wall of said investigation hole by means of image pickup means, a step of sending this image to a warping microprocessor, a step of recording said photograph data in recording means, and a step of filling up said investigation hole after said photographing step is finished to repair the hole.
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patent: 4779201 (1988-10-01), Iizuka et al.
patent: 4783751 (1988-11-01), Ehrlich et al.
patent: 4852182 (1989-07-01), Herbin et al.
patent: 4855820 (1989-08-01), Barbour
patent: 5134471 (1992-07-01), Gendron et al.
Boudreau Leo H.
Geo Search Co., Ltd.
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