| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a building machine using simple constructive means, which enhances a degree of work safety for an operator and contributes to an improved road construction quality. <P>SOLUTION: A presence detection system 3 comprises a sensor 4 which is integrated in a control panel 1 of a building machine. By means of the sensor 4, a distance measurement can be carried out, which determines whether an operator is properly seated on a driver's seat 2 of the building machine or whether the operator stands properly at a standing work place. In order to determine the presence, a tolerance range may be specified, which allows a slight movement of the operator on the driver's seat 2. If the operator approaches the limits of the tolerance range, the operator is asked in time by warning signals to be seated again properly on the driver's seat 2 or adopt a proper position at the standing work place. If the sensor 4 detects no operator on the driver's seat 2 or at the standing work place, all of the functions of the building machine are stopped in order to make sure that the work site is safe. <P>COPYRIGHT: (C)2012,JPO&INPIT |
