红外线防盗报警器的设计 摘 要 在当代经济的发展和生活水平的提高下，让人们对自身的生命安全财产的保护越来越重视，而防盗警报器的发展成为了人们关心问题，而目前国内市场出现的防盗报警系统，（）文设计了一个以 C8051F020 为控制核心的简易数控恒流源系统，实现了-2A 到 2A数控可调直流恒流 关键词：恒流源；C8051F020 单片机；数字控制；稳压；扩流【论文正文（包括摘要）采用小 4 号宋体，行距采用固定值 20 磅，在每一个新的段落开始时，段落的开始缩进 2 字符】【摘要的关键词和摘要正文之间空一行，“关键词”前不需要空字符，关键词 3~7 个，各关键词之间采用分号隔开；中文摘要以 350 字左右为宜，中文摘要和关键词占一页，英文摘要要另起一页】I 【英文全部用 Times New Roman 字体】 Abstract 【小三号字体，加粗，居中上下空一行】 【正文小四号字体，行距为固定值 20 磅】The paper designs a simple constant-current source based on SCM C8051F020 as a control core, and realizes a digital control adjustable DC constant-current system within the current range from -2A to 2A.The power part uses high power transformer for power supply, uses multilevel capacitance and network to eliminate ripple interference. The power output part uses three-voltage chip for stabilizing voltage,and make use of high power Dalindon tube to enlarge current to meet the demand level after expanding power flow. The constant-current source part uses multiple precision operational amplifiers OP07 to constitute a closed-loop feedback control form, so as to improve the control precision, and the controlled part adopts Dalindon tube to enlarge current and precisely set output current. The current measurement part uses kang-manganese bronze resistance wire as the precise sampling resistance, free from the effect of ambient temperature. The display part uses 128*64 dot-matrix LCD for real-time display the setting current value and measured value. The digital control...
