| 激光测距仪的脉冲电流供电温度控制系统 |
| |
| 引用本文： | 贾方秀,丁振良.激光测距仪的脉冲电流供电温度控制系统[J].光学精密工程,2009,17(9). |
| |
| 作者姓名： | 贾方秀 丁振良 |
| |
| 作者单位： | 哈尔滨工业大学,自动化测试与控制学院,黑龙江,哈尔滨,150001 |
| |
| 基金项目： | 国家自然科学基金资助项目 |
| |
| 摘 要： | 激光测距系统中的发射器件和接收器件具有温敏特性且均为小功率器件,精密测温电路采用Pt电阻时,Pt电阻的自热效应影响测温精度.为减小自热效应产生的测温误差,在分析Pt电阻测温误差产生机理的基础上,提出了一种新的脉冲电流供电方案,建立了脉冲电流供电电路及其自热升温过程的数学模型,给出了脉冲宽度和热量积累的关系,并通过合理控制脉冲宽度大大减小了自热效应引起的测温误差.使用高阶正交多项式拟合法对Pt电阻的非线性进行了补偿,给出了该系统温度测量模块测量数据与一级标准铂电阻温度值的比较实验,在不同的温度点,该温度测量系统的最大误差为0.000 6 ℃.系统稳定性测试结果表明,该系统在0～15 ℃时,各温度点控制稳定度均优于0.005 ℃,满足高精度激光测距的需要.
|
| 关 键 词： | 激光测距仪 温度控制 脉冲供电 自热效应 |
Temperature control system supplied by pulse-drive current for laser range finder |
| |
| JIA Fang-xiu,DING Zhen-liang.Temperature control system supplied by pulse-drive current for laser range finder[J].Optics and Precision Engineering,2009,17(9). |
| |
| Authors: | JIA Fang-xiu DING Zhen-liang |
| |
| Affiliation: | JIA Fang-xiu,DING Zhen-liang(College of Automatic Measurement and Control,Harbin Institute of Technology,Harbin 150001,China) |
| |
| Abstract: | The light emitting and light receiving devices in laser range finders are low-power components characterized by temperature sensitivity. When a Pt resistance is set in a circuit for temperature measurements,the self-heating effect of Pt resistance influences the resolution of the temperature control system.In order to decrease the error caused by the self-heating effect,a new set of circuit is proposed based on a pulse-current drive.The models of pulse-current drive circuit and the equivalent heat loop of s... |
| |
| Keywords: | laser range finder temperature control pulse-drive current self-heating effect |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
