| 摘要 |
<p>The tool can be an open- or ring-end spanner, or a combined version (10) of both with a ring (16) at one end and a jaw (16) at the opposite end of the shaft (12). A display (20) is positioned in the center of the shaft (12) and provided with cables (28) at both ends leading to ceramic piezo-sensors (30) attached to the tool heads (16). The mechanical forces acting on the tool (10) are converted by the piezo elements (30) into electric energy transmitting a signal to the display area (20, 201).</p> |
