To quickly and accurately estimate the load swing angle of a crane at low cost.SOLUTION: A load swing angle estimation device 50 for a crane comprises: sound wave receivers M1 to M3 arranged along a predetermined direction; a time difference calculation unit 51 that calculates the time difference ΔT1 and ΔT2, which are the deviations in the timing of each sound wave receiver M1 to M3 receiving the sound generated by a suspended load support or a suspended load supported by the suspended load support; a distance difference calculation unit 52 that expresses the distance difference ΔD1 and ΔD2, which are the difference between the distances from the sound generation position to each sound wave receiver M1 to M3, by functions F1(θ) and F2(θ) with the load swing angle θ as a parameter; and a load swing angle calculation unit 53 that calculates "V×ΔT1=F1(θ)" satisfying the distance differences ΔD1 and ΔD2, and obtains a load swing angle θ using "V×ΔT2=F2(θ)", where the speed of sound is unknown V.SELECTED DRAWING: Figure 2

    【課題】迅速且つ正確に低コストでクレーンの荷振れ角度を推定する。【解決手段】クレーン用荷振れ角度推定装置50は、所定の方向に沿って配置された音波受信器M1〜3と、吊り荷支持部又は吊り荷支持部に支持された吊り荷で発生した音を各音波受信器M1〜3が受信するタイミングのずれである時間差ΔT1、ΔT2を算出する時間差算出部51と、音の発生位置から各音波受信器M1〜3までの距離同士の差である距離差ΔD1、ΔD2を、荷振れ角度θをパラメータとする関数F1(θ)、F2(θ)で表す距離差算出部52と、音の音速を未知数Vとして、距離差ΔD1、ΔD2について成り立つ「V×ΔT1=F1(θ)」、及び、「V×ΔT2=F2(θ)」を用いて、荷振れ角度θを算出する荷振れ角度算出部53とを備える。【選択図】図2


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    Title :

    LOAD SWING ANGLE ESTIMATION DEVICE FOR CRANE


    Additional title:

    クレーン用荷振れ角度推定装置


    Contributors:

    Publication date :

    2020-12-17


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B66C Krane , CRANES / G01B MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS , Messen der Länge, der Dicke oder ähnlicher linearer Abmessungen



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