PLC皮带秤控制系统硬件设计.doc

摘 要 随着传感器、电子技术和微机技术的崛起，称重技术得到了迅速发展，称重在数字化，智能化等方面有长足的进步，称重装置的研究与开发也进入了一个段。皮带秤等衡器更是作为一种新兴的高技术产业而受到世界各国的普遍关注，用新技术，开发各种自动称重系统，提高动态称重的准确度，加强网络功能是发展的重点。我国的衡器产业己初具规模，但高档次衡器产品技术水平落后，具有自主知识产权的高档次衡器产品对发展我国的衡器产业具有重要意义。 随着传感器技术、电子仪表技术的发展，可以输出电信号的速度传感器及称重传感器迅速取代了机械式皮带秤的相应机构，而对速度、重量信号进行放大处理及实现各种运算都可以放在电子仪表中完成，称量精确度提高了，秤架结构简化了，因此电子皮带秤迅速全面地取代了机械式皮带秤。但机械式皮带秤在其长达六十年左右的发展过程中也为皮带秤的使用积累了丰富的应用经验，没有机械式皮带秤的昨天，就没有电子皮带秤的今天。 关键词 可编程控制器;传感器;皮带秤 Abstract Along with spread a feeling machine, electronics technique technical with tiny machine of rising, weighed a technique to get a quick development, weigh at the numeral turn, the intelligence turn etc. contain substantial progress and research and development which weigh device also got into a segment. Belt weight Heng machine is also conduct and actions a kind of newly arisen and high technique industry but be subjected to an international community of widespread concern, use a new technique, develop various auto weigh system, raise the accurate degree that dynamic state weigh, strengthen the network function is the point of development. Heng machine the industry personal beginning of our country has scale, but upscale time the Heng machine product technique the level fall behind, have an independent intelligent property right of upscale time Heng machine product to development our country of the Heng machine industry have important meaning. Along with spread a feeling machine technique, the technical development of the electronics appearance, can outputted the speed of telecommunication number to spread a feeling machine and weighed to spread a feeling machine to quickly replace correspond of the machine type leather belt steelyard organization, but to the speed, weight signal carry on enlarging a processing and carry out various operations can put in the electronics appearance completion, measured accuracy to raise, the steelyard structure simplified, so electronics leather belt steelyard quickly and completely replaced the machine type l