【作者】 任丽辉；

【导师】 张明路； 孙立新；

【作者基本信息】 河北工业大学 ， 机械制造及其自动化， 2002， 硕士

【摘要】 快速成型机广泛应用于原型制造、模具制造等行业中，具有广阔的发展前景。但是，在加工时容易出现火灾和断纸等问题，影响了产品的制造速度。快速成型机的安全性已越来越为人们所重视，但目前国内外还未见有快速成型机防火系统的相关报道。针对LOM快速成型机存在的加工隐患，本文结合国家863计划的子项“LOM快速成型机智能安全防火控制技术及成型材料的研究”(项目编号863-511-920-009)，在全面分析了火灾特征和火灾探测技术的发展现状的基础上，研究并设计了一套多传感器进行监控火灾和断纸的方案。本论文的主要工作包括： 1．介绍了快速原型技术和火灾探测报警技术的发展现状，分析了LOM快速成型机发生火灾和断纸的原因，提出用紫外线火焰探测器和摄像机做为检测元件的方法。 2．使用单片机进行智能防火监控，存在着太阳光和加工火花等干扰信号的影响。另外，背景噪声强烈，对系统的抗干扰性也提出了较高的要求。本系统采用紫外线火焰传感器作为探测器，结合硬件看门狗及软件滤波等方法，有效地屏蔽了噪声的影响；系统稳定可靠，具有自诊断功能，可有效防止误报和漏报，实现准确报警，并具有丰富的各种显示和报警功能。 3．在基于图像视觉的智能监控系统的研究中，作者研究了火灾和断纸现象的影像表现形式，建立了火灾识别的模型和断纸识别的算法，提出了一套较完整的从图像的采集、预处理、特征提取到识别的视觉监控系统的方案。系统采用友好的windows界面设计，可实现对快速成型机的实时监控。 本文对LOM快速成型机的智能防火系统做了有益的探索，对于提高LOM快速成型加工的安全性具有重要的实用价值。更多还原

【Abstract】 Rapid Prototyping Manufacture(RPM) ,which has a bright prospect as a technique, has been widely applied in the scope of prototyping and mould manufacture. Pitifully, it’s proneness to fire and paper rupture severely affect the quality control of production when manufacturing. Although people begin to attach more and more importance to the security of RPM, there are few correlative articles about this topic both domestic and overseas. In order to solve the hidden producing troubles of RPM, author designs and develops a fireproof system based upon technology of multi-sensor to detect fire and paper rupture after making fully analysis of fire feature and widely research in the domain of fire detection technology. The majority of the contents in the dissertation is also part of work done by the author in a sub-subject of the national 863 project "Research on the intelligent safety fireproof controlling technology and moulding material of LOM RPM equipment" (No.863-511-920-009) .The article’s main topics are described as follows:1. The author first make an brief introduction to the current development of RPM and fire detection technology, next analyze the cause of firing and paper rupture, and promote a resolvent of using UV detective sensor and vidicon as detection components.2. Sun’s rays and sparkle produced during manufacturing have apparent impact on the correctness of detecting fire if using SingleChip as control component. In addition, background noise have to be token into account .All these requires that the whole system to have higher anti-interferce properties .By adopting the technology of UV sensor, Watchdog and software filters, noise is notably shielded, accordingly the system gains high performance in reliability and stabilization. This is also ensued by its self-examination function which can efficiently avoid error or miss alarm. Morever, it has several mode of display and alarm which make the system more portable3. In the research of intelligent fireproof system based on image analysis, the author probe into the field of video-show patterns of fire and paper rupture ,construct the model for fire recognition , b;.ild a arithmetic for paper rupture and promote a scheme for vision stakeout system ranging from image grabber, image processing, feature extraction and recognition. The scheme uses friendly Windows interface which make detection to RPM atreal time realizable.The article is a probe for the intelligent stakeout system of LOM RPM. The system has practical value in improving the safety of RPM machine.更多还原