Online monitoring device for structural damage of high temperature pressure pipeline

The invention relates to an online monitoring device for structural damage of a high temperature pressure pipeline. The online monitoring device is realized by settings of hardware and software control. The hardware settings comprise a welded high temperature strain gauge, a lead, a lead seat, an annular fixed bracket, a connecting bolt, a lead fixing cassette, a thermal insulating layer and the like; and the software settings are mainly concentrated on an upper computer of a test terminal. The software system takes a damage identification module as a center, collects damage characteristic physical quantity in real time, calculates damage factors DI (t) by adopting the damage module in real time, and judges the damage degree of a sensing path with the damage factors. According to the invention, the online monitoring device can carry out online monitoring on the damage of various metal pressure pipelines in complicated environments, can accurately identify and position multiple damage, and has the characterist