摘  要：設(shè)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(tǒng)的實現(xiàn)方案，整個系統(tǒng)通過STM32微控制器來控制，由24位超低噪聲的模數(shù)轉(zhuǎn)換器ADS1232來對稱重傳感器的模擬信號進行轉(zhuǎn)換，在微控制器內(nèi)進行數(shù)字濾波等一系列處理，把所需要的數(shù)據(jù)通過SPI接口寫到nRF905的寄存器中并發(fā)射出去，接收部分接收數(shù)據(jù)，微控制器再通過SPI接口將nRF905寄存器中數(shù)據(jù)讀出，并通過UART發(fā)送到計算機用于顯示和分析，實現(xiàn)一臺計算機來同時操作多個稱重臺。
關(guān)鍵詞：電子天平；STM32微控制器；ADS1232模數(shù)轉(zhuǎn)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(biāo)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