红外非接触测温系统设计与实现-微电子学与固体电子学专业论文.docxVIP

一一；萱i宣iiii宣置iiiiiiiiiiiiiiiiiiii y飞n^’i公掣¨‘j 中文摘要 由于SARS、禽流感以及甲型H1N1等疾病，导致成千上万位病毒感染者死亡， 而这些流行性疾病大都是由动物病情引起的。动物健康很多时候与体温相关，未 检测出的不合格肉类流入食品市场，影响食品安全，对人类健康、生命产生严重 威胁，因此，动物体温的测量在疫病预防、发现及控制中起着极其重要的作用。 本文设计了一个非接触红外测温系统，能够对动物体温进行非接触较远距离测 量。采用凸透镜简易聚光系统，大大降低系统成本。在传感器前加装直径为lcm， 焦距为10mm的凸透镜，根据凸透镜成像原理，对传感器视场及凸透镜成像大小 关系的计算与验证，成功实现聚焦红外线，使得测量距离增加，并驱动激光二极 管照出测温区域，完成动物体温的准确测量。选用MLX90614红外测温传感器， 8 1 1 0 1热电偶采集动物体温和环境温度，分别经放大器放大，ADC进行模数转换， DSP数字信号处理，得到的数字信号经低通滤波储存在传感器RAM中，单片机 STCl2LE5A60S2通过SMBus总线读取RAM中存储的温度，并驱动12864液晶屏 显示温度值。 系统经调试后，测温距离为lOcm，测温精度为士0．5C。由于测量快速、使用 便捷，可以应用在动物体温异常情况大规模筛选中。 关键词：STCl2LE5A60S2；MLX90614；红外测温；动物测温 万方数据  黑龙江大学硕士学位论文 Abstract The outbreak of SARS，bird flu，H 1 N 1 and other unexpected epidemic shocked the world，thousands and thousands ofpatients died，and we found that these epidemic disc ases are caused by the animal、S diseases．Taking animal、S temperature helps to know ab out their health condition and heat loss of the organism，SO that find these infectious dise ases early．Undetected unqualified meat，that might flow into the food market，will affec t the food safety and threaten seriously human health，SO the measure of animal’S temp erature plays an extremely important role in prevention，detection and control of the disc ases。 This paper designs a non—contact infrared temperature measurement system，which is capable of non-contact measuring animal’S body from a gmat distance．Today, ong。range infrared sensors cost more and are commonly used in industrial temperature acquisition．From this article the design—simple converging lens system，installed in front of the sensor 1 cm diameter of 1 0mm focal len百h lens，by calculating and verifying of the sensor field of view and convex imaging principle，successfully focusing on the infrared，make the measurement distance increasing，and drive the laser diode lights temperature region，and complete the accurate measurement of body temperature of the animals．Selection MLX906 1 4 infrared temperature sensors， thermocouple collect