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A new type digital inclination angle measuring instrument is researched, which includes a low power, low noise, low cost MEMS accelerometer and a fully integrated mixed signal System-On-a-Chip MCU C8051F040. The signal processing of MEMS accelerometer is divided into conditioning, sampling, converting, and temperature compensation, then calculating the inclination angle value, and displaying the angle...
This paper introduces a kind of Thick film integrated circuit design of multi-measurement module. The thick film integrated circuit improves many inadequacies of traditional single signal collecting system, like various spices, poor generality, inconvenient debug and maintenance etc. It realizes the measurement of various signals like voltage, current, thermocouple, resistance, frequency etc, and...
High-voltage power system equipment has the following problems during the long-running process: surface oxidation and corrosion, fastening bolt losing, the junction between contact and bus row is aging etc. They make the equipment is very hot, even produce the serious accident. And there is high-voltage exposed in the switchgear, the space is very small, so manual temperature measurement is impossible,...
This article describes the hardware design and software design of ARM-based flow totalizer meter. The greatest advantage of the instrument system can be to measure the measured objects of flow with high accuracy in different regions, having the functions of remote online management over IP. and system software upgrade. At the same time of the flow measurement, pressure and temperature are also measured...
Wireless sensor networks (WSN) greatly extend our ability to monitor and control the physical world. It can collaborate and aggregate a huge amount of sensed data to provide continuous and spatially dense observation of environment. The control and monitoring of indoor atmosphere conditions represents an important task with the aim of ensuring suitable working and living spaces to people. However,...
The sensors' output data must be optimized because of the zero output varies along with time and temperature in the dynamic measuring accuracy of low cost inertial measurement unit (IMU). Two steps are done to achieve the designed precision. Firstly, the Grey model theory is proposed for the gyro's null drift output data process. Secondly, the RBF neural network is presented to compensate the gyro's...
Thermal modeling of the power transformer to estimate the internal temperature only reflects the winding hot spot to a certain extent. The application of optical fiber sensors to measure transformer internal temperature directly can obtain the true temperature with high accuracy and stability and overcome the shortcomings of traditional electric sensors. This paper analyses the measuring principle...
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