WATER LEVEL DIFFERENCE MEASURING APPARATUS AND WATER LEVEL DIFFERENCE MONITORING SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a new water level difference measuring apparatus using an optical fiber, making it possible to compare water level differences at two points easily and advantageously in terms of system construction. SOLUTION: Water is introduced into first and second water conveyance chambers 1 and 2 from a portion where a difference in water level occurs. A bellows 3 which is contracted upwards by water pressure is provided in each of the two water conveyance chambers 1 and 2, and the displacement of the end wall 3a of the bellows is transmitted to a balance 5 via a rod 6 connected to the bellows, so that the balance 5 is tilted when a difference in water level occurs. This tilt switches the actuated states of two sensors 7. The sensor 7 causes light transmission losses by pressurizing and deforming the optical fiber by means of a pressurizing element 7a. By checking the operating condition of the sensors by means of a light transmission loss distribution measuring device, the occurrence of the difference in water level can be detected.