文档介绍：摘要
基于对睡眠障碍的研究,如果在睡眠中呼吸发生10秒或10秒以上的暂停,就会对生命构成威胁。家用呼吸检测仪能准确、动态、高效的反映人们的身体状况,当人们睡眠呼吸发生异常:呼吸暂停大于等于10秒时,能及时的发出报警并显示当前日期、时间,所提供的数据也将为医生制定治疗方案提供重要依据。
家用呼吸检测仪的设计,是以热敏电阻作为传感器,首先对呼吸信号进行提取,在对提取的信号进行处理,包括信号滤波、信号放大等。通过单片机来控制处理后的信号,最后为显示报警模块,以便及时准确的了解被测人的信息。
信号提取模块采用热敏电阻作为传感器,对温度信号进行提取。所提取的呼吸信号在进行放大滤波的处理,这里采用CA3140作为运算放大器,电阻和电容构成高通滤波和低通滤波,隔除直流。峰值检测同样运用到运算运算放大器,这里采用CA3140运算放大器。将所得平均值与模拟值进行比较,选用CA3130运算放大器实现此功能。再选用液晶LCM128645ZK对测量结果进行显示,当结果出现异常时采用蜂鸣报警器报警。
此家用呼吸检测仪经过严谨的测试和试用后可以适用于具有睡眠障碍的患者。家用呼吸检测仪的研制和应用具有重要的研究价值和现实意义。
关键词家用呼吸检测仪热敏电阻单片机睡眠障碍
Title Home breath test instrument
Abstract
Based on the study of sleep disorders, sleep breathing occur if 10 seconds or 10 seconds or more of the suspension, would pose a threat to life. Home breath test instrument can be accurate, dynamic, efficient reflection of people's physical condition. Exception occurs when people sleep apnea: apnea> 10 seconds, an alarm can be timely and displays the current date, time, The data they provide medical treatment plan will also provide an important basis.
Home breath test instrument design is based on thermistor as a , the respiratory signals extracted in the extracted signal processing, including signal filtering, signal amplification and so on. Processed through the microcontroller to control signal, and finally for the alarm module in order to timely and accurate information about the tested person.
Signal extraction module thermistor as a sensor, the temperature signal is extracted. The extracted respiratory signal during amplification and filter processing. Here, as with CA3140 operational amplifiers, resistors and capacitors constitute a high pass filter and low pass filter, filters to remove DC. Respiratory signal is very weak, where once again the need to extract the respiratory pared to enlarge, use CA3130 operational amplifier to achieve this functionality. Re-use LCD LCM128645ZK measured results show that when the result of abnormal alarm when the alarm by Fengming.
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