CAJ | 학술논문

提出一种结合矩特征和傅里叶描述子的示功图故障诊断方法。示功图经过最佳阈值分割和边缘检测后，得到边界为最大区域填充后的图像，计算图像的矩特征获得表示物体形状的矩特征序列，再通过离散傅里叶变换得到具有平移、旋转和尺度不变性的归一化矩特征傅里叶描述子，采用欧氏距离法进行分类。实际应用表明：该诊断方法在油田抽油机故障诊断中具有可行性和有效性。
제출일충결합구특정화부리협묘술자적시공도고장진단방법。시공도경과최가역치분할화변연검측후，득도변계위최대구역전충후적도상，계산도상적구특정획득표시물체형상적구특정서렬，재통과리산부리협변환득도구유평이、선전화척도불변성적귀일화구특정부리협묘술자，채용구씨거리법진행분류。실제응용표명：해진단방법재유전추유궤고장진단중구유가행성화유효성。
An indicator diagram fault diagnosis method which having torque characteristics and Fourier de-scription combined was proposed.Through optimal threshold segmentation and edge detection, the image of boundary with the largest filling area can be obtained;through calculating the image’ s torque characteristics, the torque characteristic sequence of the object shape can be reached;through discrete Fourier transform, the normalized torque characteristics’ Fourier description which boasting of features like translation,rotation and scale invariant was obtained and the fault types were classified by Euclidean geometrical distance method.Prac-tical application proves the proposed method’ s feasibility and effectiveness in diagnosing pumping unit’ s fault.