【摘要】 针对目前我国大气边界层温度无线探测系统存在的数据可靠性差、信号频率漂移大、灵敏度低等缺点,采用了在发射端基于声表面波谐振器ASK调制,在接收端使用能自动调谐接收频率的高灵敏度接收芯片进行ASK解调的设计方案。设计有效地改进了检测系统的性能,系统的抗干扰措施也作了研究。实验结果表明,测量-20℃～+40℃之间的温度,误差仅为0.03℃～1.56℃,测量精度得到了提高;系统性能大有改善。更多还原

【Abstract】 For the defects in the wireless detection system for the atmospheric boundary temperature,such as bad data reliability,obvious signal frequency drift,and low sensitivity.A circuit system was designed,in which SAW resonator was used to modulate ASK in the transmitter,and a high sensitivity receiving Micrf009BM chip used to automatically tune and demodulate the receiving signal of ASK in the receiver.This circuit optimized effectively the qualities of the detection system.Its anti-jamming measures property is also studied.Experimental results show that the error of temperature is only 0.03 ℃~1.56 ℃,measuring the temperature over a range between-20 ℃ to +40 ℃.From the measurement accuracy,the quality properties of the wireless detection system has been well improved.更多还原