The invention discloses a crane telescopic boom control device and method and a crane. The device comprises a displacement sensor and a controller, wherein the displacement sensor is arranged at the tail part of a telescopic boom, and used for acquiring the current extension length of a telescopic oil cylinder and the initial length of the telescopic oil cylinder during last extension, the controller is connected with the displacement sensor and used for acquiring the current extension length of the telescopic oil cylinder and the initial length of the telescopic oil cylinder during last extension, which are sent by the displacement sensor, when the preset conditions are met, and triggering an oil cylinder electromagnetic valve for turning on the telescopic oil cylinder when a first difference between the initial length and the current extension length is greater than or equal to a first preset value, so that a rod-less cavity of the telescopic oil cylinder is pressurized, and the pressurization judgment error problem of a single-cylinder bolt type telescopic boom during an oil charging and pressurizing process in the prior art can be solved.


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    Title :

    Crane telescopic boom control device and method and crane


    Contributors:
    LIU YONGZAN (author) / MAO YAN (author) / ZHANG SONGLIN (author)

    Publication date :

    2015-04-08


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B66C Krane , CRANES



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