電子天平無線遙測子系統的研究與實現
摘 要：設計一種基于射頻芯片nRF905為無線通信核心的電子天平無線遙測子系統的實現方案，整個系統通過STM32微控制器來控制，由24位超低噪聲的模數轉換器ADS1232來對稱重傳感器的模擬信號進行轉換，在微控制器內進行數字濾波等一系列處理，把所需要的數據通過SPI接口寫到nRF905的寄存器中并發射出去，接收部分接收數據，微控制器再通過SPI接口將nRF905寄存器中數據讀出，并通過UART發送到計算機用于顯示和分析，實現一臺計算機來同時操作多個稱重臺。
關鍵詞：電子天平；STM32微控制器；ADS1232模數轉換器；nRF905芯片；CN3702芯片
中圖分類號：TP212.1；TH715.1+16；TP274+.2；TP391.45 文獻標志碼：A 文章編號：1674-5124（2013）05-0099-03
Implementation of wireless telemetry subsystem for electronic balance
LI Wen-bao， CHEN Jian-zheng， DENG Fei
（Traction Power State Key Laboratory，Southwest Jiaotong University，Chengdu 610031，China）
Abstract: This paper designs an implementation taking the RF chip nRF905 as wireless telemetry subsystem for elecronic balance. The controller of entire system is STM32 microcontrollers. The low-noise analog-to-digital converter ADS1232 converts the analog signal of the weighing sensor. The required data are writtern to the nRF905 register through the SPI interface and launch out after digital filtering. After the receiving terminal gains the data， the microcontrollers will send the data read out from nRF905 register through the UART to the computer for display and analysis. This can be operated simultaneously from one computer to multiple weighting units.
Key words: electronic balance； STM32； ADS1232； nRF905； CN3702
