Applied Mechanics and Materials Vols. 543-547

Abstract: The article introduced the necessity of the develop for synthetically test-platform system of aero instrument. The form and design of the system was introduced from the view of software and hardware. The adoptive main technique was offered in the process of systemic design.

Abstract: A remote monitoring system based on GPRS is designed to monitor the oil production in this paper. This system can help us to realize unmanned oil production. The system realizes data acquisition, transmission, storage and processing of oil wells production data. The system is mainly composed of the field monitoring terminal, wireless router and monitoring center etc. Through the GPRS wireless data transmission technology, we can realize the operation state monitoring and real-time monitoring of oil production and improve the efficiency of oil well monitoring. This system has the reliable information transmission, low cost, more automation and maintenance simple. The system can greatly improve the production management level.

Abstract: In order to realize precision measurement for the computer vision measurement system, a system comprehensive calibration method based on straight line imaging characteristics is proposed. The method uses parallel straight line edges of general 00 level gauge groups to comprehensively calibrate the measurement system. It establishes the calibration function that describes the corresponding relationship between the imaging point location and space point position, and then determines the coefficient of the calibration function according to the linear characteristic of gauge block measurement surface edges imaging. This method is simple to operate and is easy to realize and has good versatility. It can comprehensively correct all kinds of system errors such as the optical distortion, the perspective error, the sensor position error and location error of edge detection algorithm. Repeated measurement experiments for the gauges show that the precision of the measurement system can reach by means of this calibration method.

Abstract: In recent years radar life detector is the rapid development product of information technology and Biomedical Engineering, and its core is to not contact with the human body, but to realize the detection of the parameters of human life which has a breakthrough, and to explore with full range. This paper first analyzes the principle of radar life detection system and the implementation scheme of each module technology. Based on this, DSP digital signal processing method is used to design the structure system of radar life detector. Further based on the DSP signal processing principle, PD distance tracking is used to approximately simulate the time domain of human heartbeat signal. The results show that the tracking effect that is under this structure is remarkable, which has provided technical support for the practice of the area to a certain extent.

Abstract: In industrial fields such as seismic explorations, RS485 is considered a workhorse interface standard, and it is the most widely used for serial interface found on sensors. However, long-distance transmission at high data throughput is one of the key features. An improved RS485-based high-speed remote transmission method is developed to implement the transmission of large amounts of data from distributed sensors. Based on the signal integrity analysis, the hardware interface designs including interface chips and impedance matching are determined by continuous square-wave pulse transmission. Then a self-defined protocol with the aid of FPGA hardware real-time processing is designed to make high-speed clock recovery and frame synchronizations. The 8b/10b encoded data streams are transmitted via a twisted-pair cable in the experiment. The experimental results indicate that the designed RS485 transceiver unit can drive the 220 meter twisted-pair lines at 20Mbps data speed with an error rate of 10^-11.

Abstract: In this paper, infrared thermal wave NDT techniques are used for aircraft composites. After the infrared image is sharpened and the temperature field is analyzed, aircraft composite material defects can be diagnosed. Experiments show that the infrared NDT techniques can detect defects in aircraft composite image. Images and first-order differential image can be presented more clearly outline the process and temperature variations. Defect size and depth can also be measured. The best experiments are designed for different materials. After several experiments of the precise temperature calibration can be further studied. Defects can be interpreted intelligent.

Abstract: With the social development and technological progress, automatic detecting and recording system of cars for violation of traffic signal, as an important part of intelligent transportation systems, is entering the stage of full implementation. For the dependence on external systems, inconvenience of construction and maintenance, and poor flexibility of the traditional automatic detecting and recording system based on magnetic induction coil, the introduction of video-based detecting and recording system of cars for violation of traffic signal is present. In the video detection, the detection of illegal vehicles is completed by virtual coil detection algorithm based on regional changes. This system is simple, requiring only the camera installed in intersection to capture video, and junctions control terminal. At the same time, its process is easy to implement, and has a huge cost-effective.

Abstract: In this paper, a real-time monitoring system of all-weather fatigue driving which is based on DSP (TMS320DM643) is introduced. The method of regional area combining the skin color model, can quickly locate the drivers face. The paper also presents the judgment of eye state, the fetch of fatigue parameters (PERCLOS, ECT and EBF), and the general method for the determination of fatigue degree. The system has very strong using value, and practical significance.

Abstract: Ice accretion has been a huge threat for the stable operation of transmission line. Icing monitoring devices used presently are active sensors with low working stability. Signals are transmitted in the electrical form, which are easily affected by the electromagnetic interference. In this paper, an online icing monitoring device of transmission line based on fiber bragg grating (FBG) sensor is designed, and is operated as a pilot unit on the 44# tower of 110kV Zhenzou line. Experimental results show that the online icing monitoring device operates stably, and the designed fiber bragg grating sensor has high linearity, good sensitivity and high accuracy.

Abstract: In order to achieve real-time monitoring of high-voltage lines, a temperature measurement system for transmission lines based on the online passive FBG sensors is proposed. The temperature linearity of the FBG sensors designed by bi-metal package is greater than 0.999, which guarantees great mechanical strength and temperature measurement performance. The sensors are fixed to the lines by a specially designed fixture. This temperature measurement system for transmission lines based on optical sensing is running on 110kV line with strong scalability, which could monitor temperature changes of the conductor in real time.