Apparatus and method for diagnosing deterioration of smokestack

Details Apparatus and method for diagnosing deterioration of smokestack Apparatus and method for diagnosing deterioration of smokestack

Filed on

1987-01-23

Date issued

1988-08-30

Examiner

Yasich, Daniel M.

Patent Class

Boots, shoes, and leggings

Other Related Categories

364557, 374 5, 374124, G06F 1532, G01N 2572

Type

Patent

Status

active

Patent number

047681586

Description

ABSTRACT:
The disclosed apparatus and method diagnose deterioration of a steel-reinforced concrete smokestack by taking its infrared ray photograph, thermographically processing the photograph into an outside surface temperature distribution diagram so as to detect a defect as a singular point on the diagram, measuring the circumferential length (L) of the defect from the diagram, finding concrete crack width (W) at the defect based on outside surface temperature difference between sound portion of the smokestack and the defect, and calculating reduction of the strength of the smokestack wall structure due to the defect by using the circumferential length (L) and the concrete crack width (W) of the defect.

REFERENCES:
patent: 4343182 (1982-08-01), Pompei
patent: 4413324 (1983-11-01), Tatsuwaki et al.
patent: 4452538 (1984-06-01), Reger et al.
patent: 4671674 (1987-06-01), Detronde

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