专利汇可以提供Magnetic flux leakage inspection method and apparatus including magnetic diodes专利检索,专利查询,专利分析的服务。并且A magnetic flux leakage method and apparatus for inspecting magnetizable test objects such as pipelines are disclosed. Magnetic diodes are connected to give temperature-independent readings of flux leakage and are spaced apart according to the size of the flaws sought to be detected. Groups of diodes are overlapped to provide complete coverage of the area sought to be inspected. Certain of the largest signals received at any one time from the groups of diodes are transmitted to recording means to reduce the number of signals recorded. Diode signals are substracted from each other to determine relative differences in detected fluxes. For inspecting pipelines, the diodes and magnets are mounted on the apparatus by mounting assemblies which pivot about three axes and the diodes and magnets are urged yieldingly toward the pipeline wall by members formed of open cell foam polyurethane. To aid in locating the flaws along the pipeline, signals from magnetic markers placed along the pipeline are detected and recorded with signals from flaws.,下面是Magnetic flux leakage inspection method and apparatus including magnetic diodes专利的具体信息内容。
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