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The main idea of research of temperature compensation for ultrasonic rangefinder is based on the STC12C5608AD MCU and HC-SR04. Its basic principle, the basic circuits, software realization and other aspects are introduced in this paper. Considering the effect of temperature on the measurement accuracy, the system has compensation in the software; at the same time, it has an analysis about the measuring...
Pinacolyl alcohol, dimethylamine, isopropanol, thiodiglycol and triethanolamine are the precursors to chemical warfare agents, so it is necessary to indentify these chemical warfare agent precursors in situ. The cataluminescence spectra of five chemical warfare agent precursors are compared. The results show that it is possible to use the difference of the CTL spectra of the substances to identify...
Znic telluride (ZnTe) thin films were prepared by thermal evaporation method on n-type Si substrate. The electrical properties of these films were investigated with special emphasis on the effects of a depositing temperature from 540°C to 560°C with an annealing temperature of 800°C by RTA technique. Structural analysis through X-ray diffraction (XRD) was sensitive to the deposition conditions. Crystallinity,...
Nowadays, according to the production and management on the offshore oil and gas platforms, the wireless sensor networks(WSNs) will have different reply to the platforms. For the offshore Oil and Gas platforms, switching from wired to wireless sensors, allowing data collection in remote or hostile areas. Reliability, power consumption and standard are three most important concerns that related to...
Semiconductor bridge (SCB) has been widely used for both military and civilian igniting application for its improved performance in terms of high safety, low ignition energy, short ignition time and its integration into the digital circuits. Here we report the temperature and heat variation laws of bridge area on SCB under the constant current via infrared thermal imaging. The results indicate that...
Based on GSM Internet of Things technology, this thesis discusses the methods of designing the software and hardware for developing remote measuring system. It deals with the communications and blocked SMS among GSM modules. And at the mean time, it overcomes the problems caused by accidental action and unstable working status. It points out the direction for the development of instrument in networking...
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