CAJ | 학술논문

电波钟系统以STM32为控制核心，通过自制磁棒天线接收中国码，经选频放大以及单片机解码得到实时时间数据，从而在液晶显示器上显示完整时间。系统采用太阳能系统供电，能够输出稳定的恒压电源，附加秒表计时器、倒数计时器与信号强度检测，经5个独立按键控制实现相关控制功能。整个系统使用AGC提高信噪比，显示信号强度，并在此基础上尽可能降低整机能耗，从而提高供电续航能力。天线性能是影响电波钟系统的重要性能，当场强为1．0mV／m时，工作状态优良，时码信号十分清析；当场强为0．5mV／m时，工作状态正常。选频放大模块测试显示系统整体的灵敏度较高，显示模块的测试数据显示通过定时关闭背光能有效降低功耗。
전파종계통이STM32위공제핵심，통과자제자봉천선접수중국마，경선빈방대이급단편궤해마득도실시시간수거，종이재액정현시기상현시완정시간。계통채용태양능계통공전，능구수출은정적항압전원，부가초표계시기、도수계시기여신호강도검측，경5개독립안건공제실현상관공제공능。정개계통사용AGC제고신조비，현시신호강도，병재차기출상진가능강저정궤능모，종이제고공전속항능력。천선성능시영향전파종계통적중요성능，당장강위1．0mV／m시，공작상태우량，시마신호십분청석；당장강위0．5mV／m시，공작상태정상。선빈방대모괴측시현시계통정체적령민도교고，현시모괴적측시수거현시통과정시관폐배광능유효강저공모。
The radio controlled clock system which was using STM 32 MCU as the control core and receiving Chinese code through the self‐made rod antenna displays the full time on the LCD monitor and obtains the real‐time data by MCU decoding after frequency selection amplified .The system power supplied by solar energy systems with stopwatch counter timer ,digital countdown timer and signal strength detection could output stability constant power .The whole system improved signal‐to‐noise ratio adopted by AGC and displayed signal strength while reducing overall energy consumption as much as possible in order to improve power endurance .The performance of the antenna is an important influence on the performance of clock radio system ,the system works excellently with clear time code signal while the field strength is 1 .0mV/m and works normally while the field strength is 0 .5 mV/m .The test of selecting frequency amplifier module shows that the whole system has high sensitivity while the testing data of display module shows that the system can reduce the power consumption effectively with turning off backlight by timing .