| 摘要 |
PURPOSE:To detect an angle immediately when operation of an apparatus is started, without executing a special operation, by providing a backup electric power source and an automatic electric power source switching device, and always connecting a counter of an angle gauge, and an angle sensor to the electric power source. CONSTITUTION:When dig-cut control of an oil pressure shovel is executed by turning on an electric power source disconnecting switch 30 and operating a dig- cut locus control device 29, a battery 27 is connected to counting circuits 32a- 32c of angle gauges 9a-9c, and angle sensors 20a-20c, the angle gauges 9a- 9c detect an angle, and its value is inputted as a data to the dig-cut locus control device 29. In case when the dig-cut locus control device 29 is not used, as soon as the electric power source disconnecting switch 30 is turned off, a backup electric power source 37 is connected automatically by an automatic electric power source switching device 36, and an angle of each part of a front mechanism 2 of the oil pressure shovel can be detected at all times. |
