When two consecutive signals are captured by the CC, an interrupt is generated and a 16-bit register records the ¨t
value. Therefore, the maximum ¨t value that can be captured is equal to the period of the clock-frequency driving
the CC timer multiplied by 216. For example, using a 32MHz clock for the MCU, the maximum ¨t value is
approximately 2048μs, which is enough time to measure a steel-bar (ȣ=5769m/s) thickness of approximately
590cm. The MCU is a low cost and ultra low power MSP430F5308, which controls the two digital POTs, the two
multiplexers, provides power to the ultrasound front end, and generates the voltage pulse for the PZTs. In addition,
the MCU reports the thickness per channel when requested by the Sprouts platform using our PnP protocol over an
SPI-bus. Using an SPI-bus eliminates the need for accurate timing and allows modules without a crystal-clock to
communicate reliably.
3.2. Sprouts System Architecture
Sprouts is a WSN platform with a versatile system architecture designed with modular PnP features throughout
its hardware and software layers. The platform was designed to address important key features essential for
applications enabling the Internet of Things (IoT). Sprouts emphasizes small physical dimensions, rugged
packaging, ultra low power, modularity, PnP operation, energy harvesting, and remote triggering, which are all
important features for industrial use. The hardware architecture is designed with modular and interchangeable layers
as seen in Figure 3. Sprouts hardware architecture layers and features are described as follows:
1) Magnetic Layer: Sprouts utilizes a strong disc magnet (neodymium 20x2mm) to easily attach the platform on
metallic surfaces. This allows for easy deployment in industrial environments.
2) Sensor layer: The sensor layer provides access to our standard PnP protocol. There are four communication
ports to attach external modules. This allows for easy PnP customization of the platform per applications
When two consecutive signals are captured by the CC, an interrupt is generated and a 16-bit register records the ¨t
value. Therefore, the maximum ¨t value that can be captured is equal to the period of the clock-frequency driving
the CC timer multiplied by 216. For example, using a 32MHz clock for the MCU, the maximum ¨t value is
approximately 2048μs,ซึ่งมีเวลาพอที่จะวัดแถบเหล็ก ( ȣ = 5769m / s ) ความหนาประมาณ
590cm . MCU เป็นค่าใช้จ่ายต่ำและ msp430f5308 พลังงานต่ำเป็นพิเศษ ซึ่งการควบคุมสองดิจิตอลหม้อสอง
multiplexers , ให้พลังงานอัลตราซาวปลายด้านหน้า และสร้างแรงดันชีพจรสำหรับ pzts . นอกจากนี้
the MCU reports the thickness per channel when requested by the Sprouts platform using our PnP protocol over an
SPI-bus. Using an SPI-bus eliminates the need for accurate timing and allows modules without a crystal-clock to
communicate reliably.
3.2. Sprouts System Architecture
Sprouts is a WSN platform with a versatile system architecture designed with modular PnP features throughout
its hardware and software layers. The platform was designed to address important key features essential for
applications enabling the Internet of Things (IoT). Sprouts emphasizes small physical dimensions, rugged
packaging, ultra low power, modularity, PnP operation, energy harvesting, and remote triggering, which are all
important features for industrial use.สถาปัตยกรรมฮาร์ดแวร์ถูกออกแบบมาพร้อมกับโมดูลการชั้น
ตามที่เห็นในรูปที่ 3 ถั่วงอกฮาร์ดแวร์สถาปัตยกรรมชั้นและมีอธิบายดังนี้ :
1 ) ชั้นแม่เหล็ก : ถั่วงอกใช้แม่เหล็กแผ่นดิสก์แข็งแรง ( นีโอดีเมียม 20x2mm ) ได้อย่างง่ายดายแนบแพลตฟอร์มบน
พื้นผิวโลหะ นี้ช่วยให้ใช้งานได้ง่ายในสภาพแวดล้อมอุตสาหกรรม
2 ) ชั้นเซ็นเซอร์ : The sensor layer provides access to our standard PnP protocol. There are four communication
ports to attach external modules. This allows for easy PnP customization of the platform per applications
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