Urban road surface flaw detection detector and terminal thereof

Abstract

The invention discloses an urban road surface flaw detection detector and a terminal thereof in the field of detection instruments, and aims to overcome the defect that a sensor is separated from a deflection basin due to the fact that the return direction of a buffer assembly is not specific in the prior art. In order to overcome the problem, according to the technical scheme, the urban road surface flaw detection detector comprises a stable loading platform located on the upper portion and a bearing table located on the lower portion, a stroke rod is wrapped by a gravity hammer, and a buffer assembly is arranged on the surface of the bearing table; the buffer assembly is sequentially divided into a rubber layer, a tension spring layer and a point contact layer from top to bottom, a plurality of oppositely-arranged tension springs are arranged in the tension spring layer, the rubber layer is provided with cylindrical protrusions, the protrusions define a rectangular matrix along the center of the rubber layer, and due to the fact that the contact time of the gravity hammer and the rubber layer is prolonged, the return direction of the tension springs is limited; therefore, when the tension springs return, the tension springs can only return in the direction away from the rubber layer, meanwhile, the measurement time of a first sensor is prolonged, and the correctness of data collection is facilitated.

Description

technical field [0001] The invention belongs to the field of detection instruments, in particular to an urban pavement flaw detection detector and a terminal thereof. Background technique [0002] With the increase of expressway mileage in our country year by year, people pay more and more attention to the scientific management of expressways. An important indicator of pavement technical design is the allowable deflection value. Falling Weight Deflectometer (FWD), a dynamic testing equipment, has been more and more recognized for the non-destructive testing of subgrade and pavement deflection, and a lot of achievements have been made in the development and application of FWD. FWD measures the dynamic deflection of the pavement, and can back-calculate the modulus of resilience of the pavement. my country's "Highway Subgrade Pavement Field Test Regulations" (III059-95) has also listed FWD as a deflection testing equipment. It is important to use FWD for further development, ...

AI Technical Summary

Problems solved by technology

[0005] However, in the above solution, the buffer layer component rebounds toward both ends after the pressure disappears. In view of this rebound method, the sensor will be out of contact with the deflection basin, or the device as a whole will rebound upwards, resulting in data errors.

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