Development of a Self-Powered Weigh-In-Motion (WIM) System
| 项目名称： | Development of a Self-Powered Weigh-In-Motion (WIM) System |
| 摘要： | This study further develops a roadside piezoelectric energy harvesting system. The basic sensing element is a stack of 6 piezoelectric disks, 1-inch in diameter, connected in parallel. A set of 4 of these stacks supports a metal load carrying plate installed flush with the pavement surface. These piezo stacks exhibited a linear voltage versus stress behavior that is relatively independent of loading frequency. This will allow estimating of axle loads. At the same time, these 4 piezoelectric stacks generate very high voltages (i.e., 100 Volts for a car axles and 800 Volts for a truck axle) but relatively low amperages (i.e., 10-100 mA depending on load level). The electrical power generated is sufficient to keep the rechargeable batteries on site sufficiently charged to power at 3.3 V a microprocessor with a power consumption of 0.4 μA “dormant” and 40 μA “awake” (e.g., Analog Devices ADuCM4050). This dual-role for the piezo-stacks developed represents a leap forward in weigh-in-motion (WIM) technology. It will allow the development of a low cost WIM system that can operate off the electrical grid. This will provide state agencies a much better informed picture of the utilization of their roadway and bridge infrastructure. |
| 状态： | Completed |
| 资金： | 100022 |
| 资助组织： | Office of the Assistant Secretary for Research and Technology |
| 项目负责人： | Melson, Christopher |
| 执行机构： | University of Texas at Arlington |
| 开始时间： | 20190815 |
| 预计完成日期： | 20210215 |
| 主题领域： | Data and Information Technology；Energy；Freight Transportation；Highways |
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