A horizontal cylindrical tank is a common storage device for petroleum products, and its capacity table is an important basis for calculating the volume of liquid poured into and out of the tank. In this study, a method for measuring the capacity of horizontal cylindrical tanks is proposed, focusing on the problems of large workload and time consumption of existing measurement methods. The method is based on the Monte-Carlo algorithm. The capacity table is calculated by arranging the sensor points on the inner wall of the tank, and then counting the number of sample points that fall in the horizontal cylindrical tank according to the coordinates of the sensor point, the distance from the sensor point to the origin, and other parameters. It was found, that the relationship between the relative error of the measured result and the height of the liquid level conforms to the exponential function. Based on this relationship, the error compensation algorithm is established, which can help to reduce the absolute error and relative error of the measurement result.

卧式圆柱罐是石油产品的常用储存装置，其容量表是计算进出罐的液体体积的重要依据。本研究针对现有测量方法工作量大、耗时长的问题，提出了一种测量水平圆柱罐容量的方法。该方法基于蒙特卡罗算法。容量表的计算方法是将传感器点排列在罐内壁上，然后根据传感器点的坐标计算落入水平圆柱罐中的采样点个数，即传感器点到容器的距离。原点和其他参数。它被找到了，表明测量结果的相对误差与液位高度的关系符合指数函数。基于此关系，建立误差补偿算法，有助于减小测量结果的绝对误差和相对误差。