| 摘要 |
<p>PROBLEM TO BE SOLVED: To display an alarm representing unhoused state of a boom before starting of travel, by a safety device for a vehicle with a boom that is easily attached to a vehicle with a boom.SOLUTION: A boom angle detection device 100 is attached to an appropriate place of a boom 42 of a vehicle 10 with a boom. The boom angle detection device 100 detects inclination of the boom 42 by an incorporated acceleration sensor, and transmits an alarm signal by radio if its value exceeds a predetermined threshold value. A boom angle alarm device 200 attached to an operation chamber 20, when receives the alarm signal while detecting approach of a human being with an incorporated human sensor, displays an alarm by ringing a buzzer, turning on a lamp, or a voice message.</p> |
