| 摘要 |
A hazard mitigation system (10) to detect an object (22) in a highway-railway grade crossing (12). A structure is provided that includes a fixed foundation (18b) and a surface layer (18a) that is cushionably placed above the foundation, such that the structure is located between tracks (16) at the crossing. At least one sensor (20) is mounted between the surface layer and the foundation. This sensor senses the weight of the object upon the surface layer and provides a sensor signal representative of that weight. A control unit (502) receives the sensor signal, processes it to determine whether the object represents a potential hazard, and, if so generates a warning signal. The sensor can particularly include a pressure gage (20a) or strain gage (20b), or a fiber optic sensor (20c). When a fiber optic sensor is employed, it can particularly include a fiber Bragg grating (100).
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