Measuring relative and absolute vertical height - using hydrostatic sensors and extended line filled with liq. and distributed pressure sensors

摘要

A liq.-filled pressure line or hose extends over an area to be monitored for movement or displacement. Along the line, pressure sensors are fixed at intervals, a reference sensor being located at a known height. The sensors are connected to a data acquisition and monitoring unit and thence to a computer with an alarm. The relative heights of the measurement sensors are calculated using the pressure differences measured and the specific gravity of the liq. used. USE - Warning system in avalanche areas, measurement of displacements in particle accelerators, monitoring hull structure movements in ships, measurement of deformation in buildings.