Radar sensor for contact-free velocity measurement

The radar sensor RG-30 is used by hydrography and water management. It is applied for example in open rivers, streams or channels. It is especially suitable for measurement tasks where the usage of conventional respectively contact intense measurement systems is problematic. As for example at measuring spots which are hard to reach or carry highly turbid water. It is installed outside the water and measures without direct contact to the same. Hence, the system requires no maintenance and works reliably even during high flow, floodings or despite of debris, driftwood or high turbidity.

 

The sensor impresses with low power consumption and its high reliability for permanent recording of the flow velocity. The compact design and the contact-free measurement principle by means of radar technology allows easy and uncomplicated mounting and usage.

The measurement of the flow velocity is based on the principle of the Doppler frequency shift. The sensor emits a radar signal and compares its frequency with the one of the reflected signal from the water surface. The frequency is shifted proportional to the surface flow velocity. Those signals are collected, evaluated and the medial surface flow velocity is determined.