| 摘要 |
<p>The object of the invention is to provide a cost-efficient technique for control handle for lifting devices, which withstand tough industrial environments with a minimum of maintenance and calibration. Said object is achieved by using a pressure sensor managing with great accuracy to measure pressures deviating from the atmospheric pressure. The sensor is connected to a cavity in the control handle, which partly consists of a resilient membrane, which is in its turn connected to the handle portion of the control handle in such a way that, when a vertical force is applied to the handle, a pressure deviation in the cavity being in proportion to the force. The pressure deviation measured by the sensor is read by a control unit, which in its turn controls the driving device performing the lifting operation itself.</p> |
