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| Design of acquisition system for road loading spectra data based on wheel force transducer |
| 1.School of Computer Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212003, China； |
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Abstract Indirect acquisition method of using acceleration sensor was normally used to acquire road loading spectra data,leading to large detection error. According to the direct acquisition method of wheel force transducer(WFT), an acquisition system was proposed. Unidirectional concurrent bus was designed to transmit highspeed data, and bidirectional serial bus was designed to transmit data. CAN bus and scheme based on cPCI of sensor,integrated data acquisition part and upper machine schedule were adopted in hardware system. Wireless data transmission was used in wheel force transmission module of WFT. In software system, AR model which integrated with Kalman filter was adopted for denoising of primitive loading spectra. Oncar experiment was conducted on concrete and pitch roads to acquire loading spectra data. The results show that the real road surface wave can be retained after filtering, and the smalldisturbance can also be denoised. The proposed acquisition method of road loading spectra data is reliable.
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2011, Vol. 32 
