Data Driven Time Synchronization (DDTS) provides synchronization across sensors by using underlying characteristics of data collected by an embedded sensing system. We apply the concept of Data Driven Time Synchroniza...
详细信息
ISBN:
(纸本)9781424451081
Data Driven Time Synchronization (DDTS) provides synchronization across sensors by using underlying characteristics of data collected by an embedded sensing system. We apply the concept of Data Driven Time Synchronization through a seismic deployment consisting of 100 seismic sensors to repair data that was not time synchronized correctly. this deployment used GPS for time synchronization, but due to system faults common to environmental sensing systems, data was collected with large time offsets. In seismic deployments, offset data is often never used, but we show that Data Driven Time Synchronization can recover the synchronization and make the data usable. To implement Data Driven Time Synchronization to repair the time offsets we use microseisins as the underlying characteristics. Microseisms are waves that travel through the earth's crust and are independent of the seismic events used for the study of the earth's structure. We have developed a model of microseism propagation through a linear seismic array and use the model to obtain time correction shifts. By simulating time offsets in real data which does not have offsets, we determined that this method is able to repair the offset to between 0.05 and 0.2 seconds. Our ongoing work will attempt to refine the model to correct the offsets to less than 0.05 seconds and evaluate how errors in the correction affect seismic results such as event location. Data Driven Time Synchronization may be applicable to other high data rate embedded sensing applications such as acoustic source localization.
Design of energy efficient schemes for data gathering is an important concern for lifetime enhancement of wireless sensor networks. Variation in the distances of nodes from the Base Station and differences in inter-no...
详细信息
the proceedings contain 54 papers. the topics discussed include: modelling of two-stage combustion process in SI engine with prechamber;diamond microfluidic devices manufactured withthe replica method;three-dimension...
ISBN:
(纸本)9789662191066
the proceedings contain 54 papers. the topics discussed include: modelling of two-stage combustion process in SI engine with prechamber;diamond microfluidic devices manufactured withthe replica method;three-dimensional modelling and experiment on combustion in multipoint spark ignition engine;sensor MEMS/NEMS based on multilayer dielectric nanostructures;biosensor intelligent system of rapid diagnosis;a novel relation between pull-in voltage of the lumped and distributed models in electrostatically-actuated microbeams;simultaneous measurement of fluids viscosity and density using a microbeam;modelling of flow processes in the combustion chamber of IC engine;a VHDL-AMS model of a capacitive accelerometer based on the spring elasticity constant;nanostructuring technologies for reliable moveable elements;the recursive approach to segmentation of images presenting heat-emitting objects;SPICE-based approach for magnetic memory simulation;and fuzzy logic controller for embeddedsystems.
embeddedsystems are used to implement a large number of network devices. We research the networkedembedded system architecture, and propose a layered structure and a function mapping method of the Data Link Layer. T...
详细信息
embeddedsystems are used to implement a large number of network devices. We research the networkedembedded system architecture, and propose a layered structure and a function mapping method of the Data Link Layer. the function mapping method can be used to design the low-cost and flexible embeddedsystems. We introduce how to design the buffer and interface layers to enhance the performance and portability of embeddedsystems. As an application, we design and implement a Cable Modem based on DOCSIS.
this paper present a wake-on sensor network formed withthe wake-on motes, TelosW. Our wake-on hardware and software design enable lower power operations and longer network lifetime.
ISBN:
(纸本)9781605585192
this paper present a wake-on sensor network formed withthe wake-on motes, TelosW. Our wake-on hardware and software design enable lower power operations and longer network lifetime.
In the paper, we design a navigation system based on sensor network to guide a robot to walk out of event region. the navigation system does not require any exit or locations.
ISBN:
(纸本)9781605585192
In the paper, we design a navigation system based on sensor network to guide a robot to walk out of event region. the navigation system does not require any exit or locations.
At present, the sensor node platforms from different vendors cannot easily interoperate with each other due to their heterogeneous programming environments, communication stacks and data management protocols. In this ...
详细信息
ISBN:
(纸本)9781605585192
At present, the sensor node platforms from different vendors cannot easily interoperate with each other due to their heterogeneous programming environments, communication stacks and data management protocols. In this work, we develop a sensor network virtualization framework that will enable the seamless interoperability and scalability of heterogeneous sensor node platforms.
In this paper the mathematical model of a pyroelectric sensor control adapted for usage is offered at development and simulation of motion detectors for the embeddedsystems. Master phases of caloric radiation convers...
详细信息
In this paper the mathematical model of a pyroelectric sensor control adapted for usage is offered at development and simulation of motion detectors for the embeddedsystems. Master phases of caloric radiation conversion which is swallowed by a sensor control, in an electrical signal surveyed.
We present ongoing work to develop a power transformer condition monitoring system. Energy harvesting will be used to power the sensor nodes measuring the vibration of the transformer. A subset of this work will be de...
详细信息
ISBN:
(纸本)9781605585192
We present ongoing work to develop a power transformer condition monitoring system. Energy harvesting will be used to power the sensor nodes measuring the vibration of the transformer. A subset of this work will be demonstrated.
In this demonstration, we will present three key technologies we recently developed to improve time synchronization accuracy in sensor networks: (1) Temperature Driven Time Synchronization, (2) Low-Power Sub-μSecond ...
详细信息
ISBN:
(纸本)9781605585192
In this demonstration, we will present three key technologies we recently developed to improve time synchronization accuracy in sensor networks: (1) Temperature Driven Time Synchronization, (2) Low-Power Sub-μSecond Time Synchronization, and (3) Low-Power FPGA implementation of a High-Low Timer.
暂无评论