電子天平無(wú)線遙測(cè)子系統(tǒng)的研究與實(shí)現(xiàn)
摘 要：設(shè)計(jì)一種基于射頻芯片nRF905為無(wú)線通信核心的電子天平無(wú)線遙測(cè)子系統(tǒng)的實(shí)現(xiàn)方案，整個(gè)系統(tǒng)通過(guò)STM32微控制器來(lái)控制，由24位超低噪聲的模數(shù)轉(zhuǎn)換器ADS1232來(lái)對(duì)稱重傳感器的模擬信號(hào)進(jìn)行轉(zhuǎn)換，在微控制器內(nèi)進(jìn)行數(shù)字濾波等一系列處理，把所需要的數(shù)據(jù)通過(guò)SPI接口寫(xiě)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(guò)SPI接口將nRF905寄存器中數(shù)據(jù)讀出，并通過(guò)UART發(fā)送到計(jì)算機(jī)用于顯示和分析，實(shí)現(xiàn)一臺(tái)計(jì)算機(jī)來(lái)同時(shí)操作多個(gè)稱重臺(tái)。
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(hào)：TP212.1；TH715.1+16；TP274+.2；TP391.45 文獻(xiàn)標(biāo)志碼：A 文章編號(hào)：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
