The Vibrating Wire Embedment Jointmeter is ideal for monitoring the movement of joints in mass-concrete structures. It comprises of two parts: a socket and a main body. The socket is a detachable end that is cast into the first lift of concrete. The main body is a protective outer case that houses a vibrating wire displacement transducer and screws into the socket. Once screwed into the socket, it is cast into the second lift of concrete. The transducer has a vibrating wire sensing element which is anchored at one end and connected to a spring-loaded push rod at the other end.
Any movement applied to the push rod causes the spring to contract or elongate, causing an increase or decrease in the vibrating wire tension. This tension is directly proportional to the movement applied and therefore the opening or closing of the joint.
