High density coal dust CO can not disperse into the air poisonous gas
səhifə 9/16 tarix 27.10.2017 ölçüsü 500 b. #15525
High density coal dust CO can not disperse into the air poisonous gas
Four tasks: Four tasks: locate individuals locate collapsed holes measure and forecast seismic shifts measure the concentration of gases Challenges (extreme hostile environment for radio communication)turns and twists of underground tunnels impossible to maintain a line-of-sight communication link signals being highly reflected, refracted, and scattered high percentage of humidity signal absorption and attenuation is extremely high The Processor Subsystem Architectural Overview Microcontroller Digital Signal Processor Application-specific Integrated Circuit Field Programmable Gate Array Comparison Prototypes Wireless sensor nodes are the essential building blocks in a wireless sensor network Wireless sensor nodes are the essential building blocks in a wireless sensor network sensing , processing , and communication stores and executes the communication protocols as well as data processing algorithmsThe node consists of sensing, processing, communication , and power subsystems trade-off between flexibility and efficiency – both in terms of energy and performance The Sensing Subsystem The Sensing Subsystem Analog-to-Digital Converter The Processor Subsystem Architectural Overview Microcontroller Digital Signal Processor Application-specific Integrated Circuit Field Programmable Gate Array Comparison Communication Interfaces Serial Peripheral Interface Inter-Integrated Circuit Summary Prototypes The IMote Node Architecture The XYZ Node Architecture The Hogthrob Node Architecture The sensing subsystem integrates The sensing subsystem integrates The Sensing Subsystem The Sensing Subsystem Analog-to-Digital Converter The Processor Subsystem Architectural Overview Microcontroller Digital Signal Processor Application-specific Integrated Circuit Field Programmable Gate Array Comparison Communication Interfaces Serial Peripheral Interface Inter-Integrated Circuit Summary Prototypes The IMote Node Architecture The XYZ Node Architecture The Hogthrob Node Architecture ADC converts the output of a sensor - which is a continuous, analog signal - into a digital signal. It requires two steps: ADC converts the output of a sensor - which is a continuous, analog signal - into a digital signal. It requires two steps: the analog signal has to be quantized allowable discrete values is influenced : (a) by the frequency and magnitude of the signal (b) by the available processing and storage resources 2. the sampling frequency Nyquist rate does not suffice because of noise and transmission error resolution of ADC - an expression of the number of bits that can be used to encode the digital output The Sensing Subsystem The Sensing Subsystem Analog-to-Digital Converter The Processor Subsystem Architectural Overview Microcontroller Digital Signal Processor Application-specific Integrated Circuit Field Programmable Gate Array Comparison Communication Interfaces Serial Peripheral Interface Inter-Integrated Circuit Summary Prototypes The IMote Node Architecture The XYZ Node Architecture The Hogthrob Node Architecture The processor subsystem The processor subsystem interconnects all the other subsystems and some additional peripheries its main purpose is to execute instructions pertaining to sensing, communication, and self-organization It consists of processor chip nonvolatile memory - stores program instructions active memory - temporarily stores the sensed data internal clock Dostları ilə paylaş:
