摘要
研制无线颅内压监护仪 .采用硅压力传感器作为敏感元件 ,用双桥法实现温度补偿 ,通过电压 /频率变换将压力信号转换为音频频率信号并利用无线调频发射 /接收进行传输 ,由单片机控制进行定时采样、数字滤波、标度变换、报警判断、显示、打印以及串行数据发送等处理 .该仪器克服了现有光纤颅内压监护仪的缺点 ,操作方便 。
To develop a wireless intracranial pressure monitor, a silicon pressure sensor was used as the sensing head. The double bridge method was applied to compensate temperature effects. Pressure signals were converted into audio frequency signals by a voltage to frequency converter. A single chip FM transmitter and a FM receiver composed a RF wireless chain for transmitting the frequency signals. A single chip microcomputer controlled the process of sampling, digital filtering, scaling, alarming, displaying, printing and serial transmitting of data. The instrument has overcome several shortcomings of existing optical fiber intracranial pressure monitors. It is more convenient to operate and its pressure probe is more durable.
出处
《北京理工大学学报》
EI
CAS
CSCD
2000年第1期115-117,共3页
Transactions of Beijing Institute of Technology
关键词
颅内压监护仪
硅压力传感器
无线调频发射
intracranial pressure monitor
silicon pressure sensor
wireless frequency modulation transmitter and receiver
