基于ARM920T模块的深孔表面粗糙度检测装置

在汽车工业生产现场，需要一种可对零部件深孔表面粗糙度实施检测的小型仪器。该仪器应能实现多点自动检测、复杂的数据处理、较好的图形显示功能，必要时还应能根据不同工件参数改写测试运行控制程序。过去研制的具有如此多功能的仪器，体积结构均比较庞大，难以在生产现场采用。以ARM920T为核心的嵌入式模块取代一般微型计算机，实现机电结构紧凑的整体设计，可在实现各种复杂功能的同时,降低仪器成本、提高运行可靠性、缩小体积，以适合工业现场使用。文中给出了检测装置的整体设计、嵌入式模块硬件电路接口、多点粗糙度综合参数的描述与计算方法等。该检测装置可对F16mm~25mm长度为120mm~180mm的内孔表面，实施多达32条母线512点的自动检测。经实际测试验证，该检测装置的极限误差小于5%，满足工业生产现场的需要

A New Instrument for Measuring the Roughness of the deep hole surface Based on the ARM920T Circuit Block

In the production field of the automobile industry，it is strongly needed a small sized instrument for measuring the roughness of the deep hole surface. This small sized instrument must have these functions: the automatic measurement for multiple points, the complicated data disposal ability, the good quality for graphics display, and sometimes, the rewrite permissibility of the control program to fit different workpiece. The instrument with so many functions made in past, each one have large size and were rather difficult to be used in production field. An effective compact design for the instrument has been realized with the common PC to be replaced by the ARM920T Circuit Block, one type of embedded system. The new developed instrument have not only all of the functions mentioned above but also the advantages such as low cast, high reliability, and especially the small-size. Most of details are introduced these are the integrated design of the measuring instrument, the interface circuit of the embedded system, the general parameter arithmetic for multiple points etc. The new developed instrument can be used to measure the roughness on the inner surface of a hole it’s aperture size is 16~25mm and it’s length is 120~180mm. The measured generatrixs may up to 32 and the points 512. According to the practice use test, the maximum measuring error is less than 5%, however, the new instrument is very adaptive for the industrial need