为解决有线USB(Universal Serial Bus)设备放置距离近且放置混乱等问题,研制了一款既包含点对点无线USB装置也包含一点对多点的无线USB集线器装置,可以实现无线打印功能。该系统以S3C2440 ARM9处理器为控制核心,采用Linux操作系统,无线...为解决有线USB(Universal Serial Bus)设备放置距离近且放置混乱等问题,研制了一款既包含点对点无线USB装置也包含一点对多点的无线USB集线器装置,可以实现无线打印功能。该系统以S3C2440 ARM9处理器为控制核心,采用Linux操作系统,无线部分采用WiFi(Wireless Fidelity)实现。测试结果表明,该装置可以达到较好的无线打印效果。展开更多
In this study,the multi-sensing system based on the tin oxide pH electrode for the ion-determination was presented. With the advantages of the real-time supervisory control apparatus,the measured values could be displ...In this study,the multi-sensing system based on the tin oxide pH electrode for the ion-determination was presented. With the advantages of the real-time supervisory control apparatus,the measured values could be displayed on the liquid crystal display (LCD) immediately.In this study,the basic sensor was the tin oxide pH electrode,which was fabricated by radio frequency (r.f.) sputtering system on the indium tin oxide (ITO)/glass substrate.Moreover,the major blocks of the system consist of the tin oxide electrode-based ion selective electrodes (ISEs),an analog front-ended readout circuit,a microcontroller with built-in analog to digital (A/D) converter.In addition,by the embedded system design,the measurement results can be transmitted to a portable system or computer through the Universal Serial Bus (USB) and Universal Asynchronous Receiver Transmitter (UART) interface immediately.According to the experimental results,the multi-sensing system has high performance and reliability for pH,K^+,and Na^+ detection.展开更多
文摘为解决有线USB(Universal Serial Bus)设备放置距离近且放置混乱等问题,研制了一款既包含点对点无线USB装置也包含一点对多点的无线USB集线器装置,可以实现无线打印功能。该系统以S3C2440 ARM9处理器为控制核心,采用Linux操作系统,无线部分采用WiFi(Wireless Fidelity)实现。测试结果表明,该装置可以达到较好的无线打印效果。
文摘In this study,the multi-sensing system based on the tin oxide pH electrode for the ion-determination was presented. With the advantages of the real-time supervisory control apparatus,the measured values could be displayed on the liquid crystal display (LCD) immediately.In this study,the basic sensor was the tin oxide pH electrode,which was fabricated by radio frequency (r.f.) sputtering system on the indium tin oxide (ITO)/glass substrate.Moreover,the major blocks of the system consist of the tin oxide electrode-based ion selective electrodes (ISEs),an analog front-ended readout circuit,a microcontroller with built-in analog to digital (A/D) converter.In addition,by the embedded system design,the measurement results can be transmitted to a portable system or computer through the Universal Serial Bus (USB) and Universal Asynchronous Receiver Transmitter (UART) interface immediately.According to the experimental results,the multi-sensing system has high performance and reliability for pH,K^+,and Na^+ detection.
