扫描测量

• The instrument adopts the theory of ultrasonic echo for quickly scanning river bed topography under water and employs the principle of resistance for measuring river bed topography upon water and shallow beach topography , which increases the measuring speed effectively and decreases the disturbing influence on river bed
  该仪器采用超声测量原理实现了水下地形的无接触快速扫描测量，采用阻抗原理实现了洲滩、边滩、浅滩的地形测量，有效提高了测量速度，并减小了对河床的扰动影响。