Patent ID: 11952244
Assignee: KOBELCO CONSTRUCTION MACHINERY CO., LTD.
Field: Handling (Mechanical engineering)
Classification: CPC B  G  H | IPC B  G  H

Claim 0:
1. A crane comprising:
a main body portion which includes a lower travelling body and an upper slewing body turnably provided on the lower travelling body and to which a plurality of weights can be attached;
a tag reader which is provided in the main body portion and acquires, from a weight tag mounted on each weight, identification data corresponding to each weight tag by radio communication; and
a data processing device which acquires data from the tag reader,
wherein the data processing device includes:
a data acquisition portion which acquires the identification data and reception intensity data corresponding to each weight tag from the tag reader, the reception intensity data being indicative of a reception intensity of a signal in the radio communication between each weight tag and the tag reader;
a data discrimination portion which discriminates the identification data corresponding to each weight tag into first identification data indicating that a reception intensity indicated by reception intensity data corresponding to the identification data exceeds a reference intensity set in advance for determining whether each weight is attached to the main body portion or not and other second identification data; and
an attachment determination portion which determines an attachment state of each weight to the main body portion based on the first identification data only.