农机化研究
農機化研究
농궤화연구
Journal of Agricultural Mechanization Research
2016年
8期
173-178
,共6页
水分检测仪%谷物%介电特性%电容传感器%温度补偿%低功耗
水分檢測儀%穀物%介電特性%電容傳感器%溫度補償%低功耗
수분검측의%곡물%개전특성%전용전감기%온도보상%저공모
moisture detector%grain%dielectric property%capacitive sensor%temperature compensation%low-power Dis-sipation
提出了一种利用谷物介电特性快速测量谷物含水率的方法,采用同心圆筒电容传感器,对传感器做屏蔽干扰处理. 运用Texas Instruments 公司最新的电容数字转换芯片FDC1004 ,具有测量精度高电路简单及抗干扰等特点. 加入NTC 温度传感器对测量电路进行温度补偿,人机通过按键交互,测量结果通过 LCD 屏幕显示. 系统核心器件采用单片机MSP430 F5528 ,具有低功耗及运算速度快的优点. 系统采用4 .2 V 可充电蓄电池供电,系统的测量范围为5%~35%. 标定后的系统经验证测试得测量平均误差为0.85%,符合设计要求.
提齣瞭一種利用穀物介電特性快速測量穀物含水率的方法,採用同心圓筒電容傳感器,對傳感器做屏蔽榦擾處理. 運用Texas Instruments 公司最新的電容數字轉換芯片FDC1004 ,具有測量精度高電路簡單及抗榦擾等特點. 加入NTC 溫度傳感器對測量電路進行溫度補償,人機通過按鍵交互,測量結果通過 LCD 屏幕顯示. 繫統覈心器件採用單片機MSP430 F5528 ,具有低功耗及運算速度快的優點. 繫統採用4 .2 V 可充電蓄電池供電,繫統的測量範圍為5%~35%. 標定後的繫統經驗證測試得測量平均誤差為0.85%,符閤設計要求.
제출료일충이용곡물개전특성쾌속측량곡물함수솔적방법,채용동심원통전용전감기,대전감기주병폐간우처리. 운용Texas Instruments 공사최신적전용수자전환심편FDC1004 ,구유측량정도고전로간단급항간우등특점. 가입NTC 온도전감기대측량전로진행온도보상,인궤통과안건교호,측량결과통과 LCD 병막현시. 계통핵심기건채용단편궤MSP430 F5528 ,구유저공모급운산속도쾌적우점. 계통채용4 .2 V 가충전축전지공전,계통적측량범위위5%~35%. 표정후적계통경험증측시득측량평균오차위0.85%,부합설계요구.
This article aims to present a rapid method of grain moisture measurement based on dielectric character .The capacitor sensor is composed of two metal barrels with the same center but different radiuses , deals with cutting out dis-tractions .As the core of the capacitance measurement circuit , the device of FDC1004 which is a 24-Bit Capacitance-to-Digital Converter , minimizes the peripheral components and increase the accuracy .The system interface through the keys , with the NTC temperature sensor circuit working as temperature compensation and displaying results on the LCD . The MCU of this system is MSP430 F5528 working with low-power .The measurement is powered by a storage battery of 4.2 volt , and the range of measurement is 5%~35%.After the calibration experiment ,the average error was 0.85%, meeting the requirements of the design .
