在远程控制电气设备中,红外信号的测量特征是控制的关键,在电气红外变弱的情况下,信号测量的准确性不高。设计并实现了一种以TD-SCDMA双极化天线为基础的微弱电气红外信号检测系统。系统采用2.4 GHz ISM A7105射频发射器,通过波特发生...在远程控制电气设备中,红外信号的测量特征是控制的关键,在电气红外变弱的情况下,信号测量的准确性不高。设计并实现了一种以TD-SCDMA双极化天线为基础的微弱电气红外信号检测系统。系统采用2.4 GHz ISM A7105射频发射器,通过波特发生器的时钟频率控制红外信号的发送。对设计的ICL7650-AD620芯片模块进行信号放大处理,结合基于MAX275芯片的隔离除颤模块,通过调节内置的6个电阻,完成噪声过滤。设计的TD-SCDMA双极化天线,通过多个智能天线组成的多列辐射元,形成敏感的动态联系,对微弱电气红外信号缺失特征进行强化修复,利用AT89C51单片机对微弱电气红外信号进行确认,最终实现微弱电气红外信号准确检测。通过实验测试,该系统可以在复杂环境中,对微弱电气红外信号进行准确地检测,相对于传统系统,检测准确率提高了约49%,检测时间减小了5 s左右,有很强的实际应用价值。展开更多
In the infrared spectrum absorbed type gas concentration sensor,voltage signal obtained from the two-channel thermopile infrared detector TPS2534 is very weak.In order to solve this problem,the authors have establishe...In the infrared spectrum absorbed type gas concentration sensor,voltage signal obtained from the two-channel thermopile infrared detector TPS2534 is very weak.In order to solve this problem,the authors have established the structure of the sensor and designed weak signal detecting circuit of the sensor based on infrared spectrum absorption principle,differential de-noising principle and weak signal detecting principle.The authors have made experiments using CH4 gas.The results show that the circuit can remove noise effectively and detect weak electrical signal obtained from the detector.展开更多
文摘在远程控制电气设备中,红外信号的测量特征是控制的关键,在电气红外变弱的情况下,信号测量的准确性不高。设计并实现了一种以TD-SCDMA双极化天线为基础的微弱电气红外信号检测系统。系统采用2.4 GHz ISM A7105射频发射器,通过波特发生器的时钟频率控制红外信号的发送。对设计的ICL7650-AD620芯片模块进行信号放大处理,结合基于MAX275芯片的隔离除颤模块,通过调节内置的6个电阻,完成噪声过滤。设计的TD-SCDMA双极化天线,通过多个智能天线组成的多列辐射元,形成敏感的动态联系,对微弱电气红外信号缺失特征进行强化修复,利用AT89C51单片机对微弱电气红外信号进行确认,最终实现微弱电气红外信号准确检测。通过实验测试,该系统可以在复杂环境中,对微弱电气红外信号进行准确地检测,相对于传统系统,检测准确率提高了约49%,检测时间减小了5 s左右,有很强的实际应用价值。
文摘In the infrared spectrum absorbed type gas concentration sensor,voltage signal obtained from the two-channel thermopile infrared detector TPS2534 is very weak.In order to solve this problem,the authors have established the structure of the sensor and designed weak signal detecting circuit of the sensor based on infrared spectrum absorption principle,differential de-noising principle and weak signal detecting principle.The authors have made experiments using CH4 gas.The results show that the circuit can remove noise effectively and detect weak electrical signal obtained from the detector.
