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, 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
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เมื่อสองติดต่อกัน สัญญาณจะถูกจับโดยซีซี การขัดจังหวะจะถูกสร้างขึ้น และบันทึกค่า T
ตั้ง 16 บิตทะเบียน ดังนั้น การตั้งค่า t สูงสุดที่สามารถบันทึกเท่ากับเวลาของความถี่นาฬิกาจับเวลาขับรถ
CC คูณ 216 ตัวอย่างเช่น การใช้ 32mhz นาฬิกาสำหรับ MCU สูงสุดคือ ตั้งค่า t
ประมาณ 2048 μ S , 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:เซ็นเซอร์ชั้นให้การเข้าถึงโพรโทคอล PNP ของเรามาตรฐาน มี 4 พอร์ตการสื่อสาร
แนบโมดูลภายนอก นี้จะช่วยให้สำหรับการปรับแต่งง่ายต่อการใช้งาน PNP ของแพลตฟอร์ม
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