FIBER OPTIC SENSOR UNIT, OPTICAL MEASURING SYSTEM, AXLE-COUNTING DEVICE AND AXLE-COUNTING METHOD

A fiber optic sensor unit (la) for detecting a mechanical force acting on a rail (15) comprising at least a first sensor fiber (2, 3), a first elongated fiber optic strain sensor (4) and a second elongated fiber optic strain sensor (5), wherein the first sensor fiber (2)comprises the first strain sensor (4), is characterized in that the at least one sensor fiber (2, 3) is attached to a sensor plate, and that the first fiber strain sensor (4) and the second strain sensor (5) are arranged in an x-type or v-type geometry, wherein the first strain sensor (4) and the second strain sensor (5) are arranged in an angle of 60 DEG to 120 DEG, in particular of 90 DEG, to each other. Measurements with increased amplification of the measurement signal and improved raw data can be made. 一种用于检测作用在轨(15)上的机械力的光纤传感器单元(1a)，其包括至少第一传感器光纤(2、3)、条形光纤的第一应变传感器(4)和条形光纤的第二应变传感器(5)，其中，所述第一传感器光纤(2)包括所述第一应变传感器(4)，其特征在于，至少第一传感器光纤(2、3)附接到传感器板上，所述第一应变传感器(4)和第二应变传感器(5)以x型或v型几何结构布置，其中，所述第一应变传感器(4)和第二应变传感器(5)彼此成60°至120°、特别是90°的角度布置。可进行具有增强的测量信号放