FIELD: construction of roads. SUBSTANCE: invention is designed for checking section of road pavement at road tests. Proposed device has reservoir 1 with compressed air installed on frame 13, inertia body 7 and displacement pickup 9 in contact with inertia body. Guide cup 2 is installed on reservoir 1. Guide cup accommodates bellows 3 interconnected by support rings 4. Upper bellows are provided with flange 5. Longitudinal slots are made in upper part of guide cup. Inertia body is made in form of hollow cylinder 7 enclosing guide cup 2 and connected with flange 5 of flexible member by carriers 8 passing through longitudinal slots in guide cup. EFFECT: reduced mass and overall dimensions of device. 3 cl, 1 dwg
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