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公开(公告)号：US3614889A
公开(公告)日：1971-10-26
申请号：US3614889D
申请日：1969-11-20
Applicant: DERRITRON ELECTRONICS LTD
Inventor： GEARING JAMES WALTER
Abstract: IN A METHOD OF LOCATING STRESSES IN A SPECIMEN BEING VIBRATED BY AN ELECTRO-MECHANICAL VIBRATOR, THE INFRA-RED RADIATION FROM DIFFERENT POINTS ON THE SPECIMEN SURFACE, DUE TO VARIATIONS OF TEMPERATURE CAUSED BY STRESS, IS DETECTED BY SCANNING THE IMAGE OF A DETECTOR OVER THE SURFACE. THE VARIATION MAY BE INDICATED OR RECORDED BY USING THE DETECTOR OUTPUT TO CONTROL AN ELECTRON BEAM WHICH IS SIMILARLY SCANNED OVER A SCEEN.
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