本文给出了一种采用微机实现的反吹式布代除尘器布袋破损检测装置的原理和结构。通过对压力信号的测量和分析，不仅灵敏地检测出破损布袋的数量还能准确地指示出破损布袋的位置。并且成本低。全文共分三部分，第一部分给出了一种等效电路模型和灵敏度分析，用于分析检测装置的原理和工作方式。作为装置的理论指导，该模型简单、实用。 In this paper, the principle and structure of a device for detecting the damage of a cloth-removing dust collector using a computer are introduced. By measuring and analyzing the pressure signal, it is not only sensitive to detect the number of broken bags but also can accurately indicate the position of the broken bag. And the cost is low. The full text is divided into three parts. The first part gives an equivalent circuit model and sensitivity analysis, which is used to analyze the principle and working method of the detection device. As a theoretical guide for the device, this model is simple and practical.