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检测水和冰对桥梁结构的交流阻抗和介电弛豫谱,第三及第四期:现场测试和细化新型水和桥面冰传感器系统
During Phases III and IV of this project it was determined that the physical attributes of the prototypes developed during the earlier work was inappropriate for bridge deck installations. Mn/DOT engineers required that they be planar and not require drainage through the deck. As RWIS platforms had been widely deployed on decks throughout the state, we decided to adhere to the RWIS geometric format. This necessitated a significant re-engineering of the sensor hardware before installation and testing at remote bridge sites could proceed. To that end extensive development of a robust sensor meeting these requirements was developed and tested without compromise to the earlier performance results. In large part the maintenance of performance was achieved through a significant modification of the software to include Wavelet analysis of the raw data in the determination of surface state of the sensor platform (ice vs air vs water vs electrolyte present on the sensing electrode structure). The combined regression results for raw TDR responses treated by three analysis procedures are shown to give rise to very reliable results. Unfortunately, remote field testing of sensors installed on bridge decks was not accomplished.
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以改进传感器集成(ISI)系统为目标的赤土采收,EUGS和光标
The Improved Sensor Integration (ISI) project is an effort to cross- cue various force protection and persistent surveillance systems from unattended ground sensor systems and other data sources. The ISI systems communicate primarily through cursor on target messages. The Terra Harvest controller architecture was adopted to integrate the Applied Research Associates Expendable Unattended Ground Sensor (EUGS) system into the ISI project and provides a potential entry point for other types of unattended sensors. This report describes the architecture used to integrate EUGS into the ISI system by way of Terra Harvest and Cursor on Target, and discusses some of the issues and solutions that were identified during the integration.
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仪器系统的信号调节电路的设计
This report details the current progress in the design, implementation, and validation of the signal conditioning circuitry used in a measurement instrumentation system. The purpose of this text is to document the current progress of a particular design in signal conditioning circuitry in an instrumentation system. The input of the signal conditioning circuitry comes from a piezoresistive transducer and the output will be fed to a 250 ksps, 12-bit analog-to-digital converter (ADC) with an input range of 0-5 V. It is assumed that the maximum differential voltage amplitude input from the sensor is 20 mV with an unknown, but presumably high, sensor bandwidth. This text focuses on a specific design; however, the theory is presented in such a way that this text can be used as a basis for future designs.
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用于血液和唾液的领域可用氰化物传感器的快速发展
Cyanide is a deadly poison which may be ingested or inhaled and can cause severe incapacitation or death. The diagnosis of cyanide exposure is critical to speed treatment and reduce harm. The development of a diagnostic sensor device and the identification and analysis of novel biomarkers of cyanide exposure are the major objectives of this research. Since the onset of toxic outcome from cyanide exposure is very fast, a rapid and portable sensor for the detection of cyanide exposure was developed and tested. The sensor utilized a cyanide-selective fluorescent reaction as the core chemical reaction with micro-diffusion sample preparation (previously reported). Second- and third-generation cyanide sensors were developed and the latest version is currently undergoing laboratory testing. Multiple novel markers of cyanide exposure were also identified as having potential advantages to cyanide and thiocyanate, and methods of analysis for these markers were developed or are in the process of being developed. Specifically, 2-amino-2-thiozoline-4-carboxylic acid (ATCA), alpha-ketoglutarate, and a cyanide-glutathione adduct were investigated. Toxicokinetic models were obtained through analysis of the plasma concentrations of ATCA, cyanide, and thiocyanate, analyzed from cyanide-exposed rats (previously reported), rabbits (reported in 2012), and swine, to assess the utility of ATCA as a bio-marker for cyanide exposure.