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Based on the reviewing of the wireless sensor network (WSN) research and application, the disadvantages of the traditional cable sensing data acquisition system are pointed out, and a new energy-saving, cheap and wide application scope system by Wireless RF way is proposed. This paper gives out a method of wireless sensor data acquisition system based on nRF905, including the design of structure,...
In the framework of the hardware platform, CC2420 chip which supports IEEE 802.15.4 protocol is used as RF transceiver controlling chip. 32-bit high-performance ARM processor LPC2138 is used as both protocol controller and data acquisition. Through the OP to improve the transmitting power and receiving sensitivity. The system adapts to the Universal 2.4 GHz band and it has a high transfer rate and...
A Geiger-mode avalanche photodiode (GAPD) array-based MRI compatible PET is being developed in our laboratory. The purpose of this study is to develop filtering methods for PET event signals contaminated by RF pulses for simultaneous PET-MR imaging. The detector for the MRI compatible PET was composed of LYSO scintillators coupled with GAPD arrays. PET signal acquisition was implemented by a FPGA-based...
Future RF Control systems will require simultaneous data acquisition of up to 100 fast ADC channels at sampling rates of around 100 MHz and real time signal processing within a few hundred nanoseconds. At the same time the standardization of Low-Level RF systems are common objectives for all laboratories for cost reduction, performance optimization and machine reliability. Also desirable are modularity...
In this paper, we describe a UHF radio-frequency-identification tag test and measurement system based on National Instruments LabVIEW-controlled PXI RF hardware. The system operates in 800-1000-MHz frequency band with a variable output power up to 30 dBm and is capable of testing tags using Gen2 and other protocols. We explain testing methods and metrics, describe in detail the construction of our...
In this paper, we describe a design of the hardware interface and communication process of a wireless data acquisition system using a monolithic CC1100 chip working with a PIC16Fxxx MCU. The design has been applied to collect data during the transportation of petroleum products in the petrochemical industry. The fault tolerance problem in the one-to-many data communication is solved. This paper also...
Ultrasound imaging can be improved with higher order arrays through elevation dynamic focusing in future, higher channel count systems. However, modifications to current system hardware could yield increased imaging depth-of-field with 1.75D arrays (arrays with individually addressable elements, several rows in elevation) through the use of synthetic elevation imaging. We describe synthetic elevation...
A description is given of an MRI (magnetic resonance imaging) instrumentation system, and the advantages of a distributed processing approach to its implementation are discussed. Some of the functions are described, and it is shown that local intelligence in each of the units is essential. The decomposition of such complex instrumentation problems can ease the implementation and enables equipment...
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