Patent ID: 11970869
Assignee: ZOOMLION HEAVY INDUSTRY SCIENCE AND TECHNOLOGY CO., LTD
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 7:
8. The pump truck boom control system according to claim 5, wherein a process of determining, by the determining unit, the working condition of the boom, according to the pumping state signal, the first arm on site state signal and the timing signal for the action enabling signals corresponding to the each arm in the second-type arms comprises
determining that the boom is in the opening placing boom working condition after the pump truck reaches a new construction position, when the pumping state signal indicates that the pump truck is not in the pumping state, the first arm on site signal indicates that the boom changes from the fully folded state to the non-fully folded state, and unfolding time, determined by the timing signal, of any one arm in the second-type arms is smaller than corresponding third preset time; or
determining that the boom is in the folding placing boom working condition before the pump truck transfers, when the pumping state signal indicates that the pump truck is in the reverse pumping state, and the number of reverse pumping times is greater than the preset number of times, and folding time, determined by the timing signal, of any one arm in the second-type arms is greater than corresponding fourth preset time,
wherein, the corresponding third preset time is a product of the time taken by each arm in the second-type arms to be fully unfolded and a third preset coefficient, the corresponding fourth preset time is a product of the time taken by each arm in the second-type arms to be full folded and a fourth preset coefficient, and both the third preset coefficient and the fourth preset coefficient are smaller than 1.