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The Lamb wave approach in Structural Health Monitoring (SHM) mainly cares the defects detection. It relies on the analysis of signals for physical propagation. In this paper, a sparse representation approach for modeling the signal scattering in discretized monitoring area is proposed. The overcomplete dictionary can be determined explicitly by the Lamb wave propagation theory with columns reflecting...
A data acquisition and monitoring system of machine tools is designed, which is based on Zigbee and GPRS wireless communication technology. The monitoring and alerting about the safety status of the machine tools operates via the acquisition of such physical parameters as temperature and noise. The hardware such as the CC2530 RF circuit and power module is designed. Based on the CC2530 module and...
In this paper, a power-signature-based Bayesian multi-classifier is proposed to identify various operational modes of a complex machinery system that can help determine the energy contribution of different operation modes, identify potential energy hot-spots and provide basis for more accurate energy consumption calculation. This technology can also help process experts and managers to perform the...
In complex manufacturing processes, large amounts of process parameters are monitored and recorded, creating a high-dimensional and heterogonous data warehouse. In order to improve process yield and ensure product quality, comprehensive knowledge of the process should be acquired and critical features should be identified. However, in modern industry production, big data has become quite common; online...
Effective prediction of unobservable degradation can assist to schedule preventive maintenance and reduce unexpected downtime for realistic industrial systems. In this paper, an extended time-/condition-based framework is proposed for the Probability Density Function (PDF) prediction of unobservable industrial wear. Furthering our earlier work of unobservable degradation estimation, a stage-based...
In this paper, a video frame extractor applying analog video input signals for television broadcasting monitoring system is designed and implemented in order to satisfy the requirements for rapid development of radio and television industry. The video frame extractor uses advanced RICS machine (ARM) embedded processor S3C2440A with Linux operating system as system host processor and field programmable...
A video frame extractor applying analog video input signals for omni media monitoring system is given in order to meet the increased requirements for rapid development of radio & television industries. The extractor employs advanced RISC machine (ARM) processor S3C2440 with embedded Linux operating system as host processor, field programmable gate array (FPGA) EP3C25 as coprocessor, increasing...
For the energy consumption problem of wireless sensor networks, a mobile agent routing based on improved genetic algorithm (MARIGA) is proposed in this paper. This algorithm introduces a new crossover strategy and mutation operator to effectively control the premature stagnation in the convergence process. The simulation results indicate that the MARIGA algorithm can effectively improve the routing...
MERSI (MEdium Resolution Spectral Imager) on board FY3A polar-orbiting meteorological satellite has five channels (four VIS and one thermal IR) with a spatial resolution of 250 m. This paper explores the utility of MERSI in drought monitoring through a case study in Hunan Province of China in May, 2011. Feature space of LST and NDVI are established and three indices including TVDI (Temperature Vegetation...
The mechanical properties monitoring system of permanent magnet motor operating mechanism is developed base on the indoor 40.5kV vacuum circuit breaker in order to improve the security and reliability of power system. The high-precision linear displacement sensor is used to measure the stroke of moving contact, the angular sensor is employed to test the rotation angle of motor, and the hall current...
The quality of cement mixing piles is closely related to the efficiency of soft soil reinforcement. The core sampling is the main method but not perfect on the origin identification of defect cement mixing piles. Combined with practical project, a assisting evaluation standard is set up through the test of standard piles that is used as a standard for the evaluation of defect piles. The results show...
Network monitoring is essential for assessing performance issues, identifying and locating problems. There is increasing interest in passive monitoring of flows at multiple locations within a distributed network. In order to figure out how to place monitors under cost-effective and budget constraints within the network, a new approach is presented in this paper, which solves the problem of monitoring...
Data acquisition technology based on long distance wireless network is one of the hot research problems of data acquisition technology at the present time. This paper applies data acquisition technology based on GPRS to automatic collection of noise data, designs encapsulation format of data. Data collection terminal accesses to network through GPRS to upload noise data to database of remote server...
The paper applied the data acquisition technology based on wireless network to noise automatic monitoring, combined with the hot issue of remote data transmission, explored and researched the noise data acquisition technique in the environment acoustic GIS management system of Wuhan. And it designed and realized the encapsulation format of the sending data, stored the data into the database of remote...
Health and mobility of elderly people is gaining importance in aging societies. New communication-based methods to provide health services with personal health care devices are considered promising elements of first-class medical care services for everybody. To achieve this vision, several technological issues have to be solved: (i) body sensors to monitor vital functions have to be developed; (ii)...
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