High-density electrical method automatic detection device for roadbed diseases of expressway in operation

The utility model discloses a high-density electrical method automatic detection device for roadbed diseases of an expressway in operation. The automatic detection device comprises several parts such as a retractable vehicle rack, contact type electrodes, an electrode lifting system, a spraying system, a control device and the like. The technical effects of the automatic detection device are that the contact type electrodes are manufactured by reconstructing conventional electrodes and can be directly placed on a road surface; thus application of a high-density electrical method to detection of the roadbed diseases of a road in operation is improved in applicability, and the retractable vehicle rack and the electrode lifting system are designed and realized; thus automatic control over the electrode arrangement is realized, detection efficiency is improved and the influence exerted on traffic by the detection is reduced; the spraying device is adopted to spray the electrodes with high grounding resistance so