Telescopic probe monitoring system for riverbedelevation monitoring at bridge piers

A telescopic probe monitoring system for riverbed elevation monitoring at bridge piers comprising:

• a measurement module arranged at a bridge pier under the water for measuring elevation of a riverbed under water;
• the measurement module having a housing, a multi-layer tube mounted in the housing, a driving member that is attached with a plurality of scales, mounted in the housing and used for pushing the multi-layer tube to extend and contact the riverbed;
• a photographic unit mounted in the housing for taking pictures of the driving member and producing images;
• and a sensing unit disposed on bottom of the multi-layer tube;
• a control module coupled to the driving member and the photographic unit;
• the measurement module and the control module separated with each other;
• wherein the control module controls the driving member to push the multi-layer tube for extension of the multi-layer tube;
• while the sensing unit on bottom of the multi-layer tube contacts the riverbed under the water, the sensing unit sends a sensing signal to the control module for control of the driving member to stop pushing the multi-layer tube;
• the photographic unit shoots the driving member to generate the image;
• the control module gets the elevation of the riverbed according to the image and sends the elevation to a remote monitor unit.