| 摘要 |
The invention relates to a device for thetwo-section telescopic boom length measurement, comprising sequentially interconnected linear displacement transmission element of the extending boom section, connected to the extending boom section, a linear displacement converter of the extending boom section into a rotation angle of a measuring axis installed on the principal boom section and the measuring axis rotation angle converter into electric signal, characterized in that the linear displacement transmission element of the extending boom section is executed in the form of a guide member, fastened on the extending boom portion at an angle α, which is nonzero degree, relative to the longitudinal boom axis, and the linear displacement converter of the extending boom section into a rotation angle of the measuring axis is executed in the form of a lever, one end of which is fastened on the measuring axis, and the other end is connected to the guide member with the possibility of constant sliding contact. In the preferred embodiments of the invention the guide member is performed as a string or a batten. In the further preferred embodiment the measuring axis rotation angle converter into electric signal is performed as a potentiometer pick-off, a runner of which is connected to the measuring axis. |
