| 摘要 |
A convergence meter [10] which includes a body [124] having attachment means for attaching to a first reference point, a measurement element [18] being extendible from the body of the convergence meter to a second reference point [128], electronic measurement means, operable to measure movement of the measurement element attached to the second reference point relative to the body of the convergence meter attached to the first reference point, and a wireless transceiver operable to transmit measurements taken by the electronic measurement means to a remote receiver and to receive commands from a remote controller. |
