Remotely and dynamically surveying system and method for road pre-buried shear stress

Abstract

The invention discloses a remotely and dynamically surveying system and method for road pre-buried shear stress. The surveying system comprises a shear stress surveying system pre-buried in an asphalt road, and a remote monitoring terminal system used for receiving surveying signals remotely; the shear stress surveying system comprises a signal acquisition unit, a signal analyzing device, a calculation program chip, a battery, a master control chip, a remote communication chip and a strain transducer; the remote monitoring terminal system comprises a master controller, and a remote communication chip, a display module, a printing module and an alarming module which are all connected to the master controller. Therefore, the shear stress surveying system is pre-buried in the asphalt road, data transmission of the shear stress surveying system and the remote monitoring terminal system is achieved through a wireless communication network, shear stress variation is surveyed remotely and in real time, the performance is stable, the cost is low, and great conveniences are brought for road surveying.

Description

technical field [0001] The invention relates to the technology in the field of automatic survey, in particular to a remote dynamic survey system and survey method for shear stress embedded in roads. Background technique [0002] The asphalt structure is a civil engineering structure with a large volume and a wide area, which may be subjected to dynamic catastrophic effects such as earthquakes, typhoons, and collisions, resulting in structural damage. Therefore, timely and accurate structural survey is very important for the decision-making of structural maintenance and reinforcement. At present, there are many local damage survey methods for structures, such as ultrasonic method, acoustic emission, infrared thermal imaging method, rebound method, and isotope detection method. (2) The timeliness of the survey is poor, and the evolution process of structural damage cannot be obtained; (3) The equipment is heavy and expensive. [0003] In order to obtain the internal stress i...

AI Technical Summary

Problems solved by technology

At present, there are many local damage survey methods for structures, such as ultrasonic method, acoustic emission, infrared thermal imaging method, rebound method, and isotope detection method. (2) The timeliness of the survey is poor, and the evolution process of structural damage cannot be obtained; (3) The equipment is heavy and expensive

In general, the resistance strain sensor has the disadvantages of lagging dynamic response and short service life; the piezoresistive force sensor has complex manufacturing process and high cost; the output characteristic of the capacitive force sensor has serious nonlinearity and low measurement accuracy; The piezoelectric dynamic stress sensor technology of stress is very mature, and can be made into a smaller sensor embedded in the structure, but the sensor shell is made of metal, which significantly changes the local stress field at the measuring point and affects the measurement accuracy, and The compatibility between the sensor and asphalt is poor, and it is easy to separate and fail when the asphalt enters the nonlinear stage. In addition, this type of sensor usually uses quartz material as the sensitive element, which is expensive and difficult to be widely used in civil engineering structures.

[0004] In addition, the existing sensors conduct structural surveys on asphalt roads, requiring manual data collection on site, which is cumbersome to use, high in labor costs, and low in efficiency

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