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Currently, the security industry taking the high definition network video surveillance as representation is developing rapidly,so the security device interface standard is becoming more and more important. This paper studies the security industry new standard interface ONVIF protocol, analyzes its systematic structure and work principle,discusses the interactional process of video server NVT and client NVC with ONVIF. The design scheme of IP camera based on ONVIF is presented. Finally, the instance of IP camera is given.

In fractured reservoir, the capacity of oil storage and production depends on the degree of fractures development. Therefore, the research of identifying reservoir fractures has become more important in the petroleum industry. By the research of fractures identification methods in geology, logging and seismology,the paper explains the features and advantages,disadvantages of each method. The study shows that a single method is not enough to solve problem in current conditions , the comprehensive use of various methods is required.

The non-uniformity feature of rock joints’ surface profiles is the main influencing factor of the sampling representativeness. In order to analyze the sampling representativeness of rock joints statistically, the joint roughness coefficient (JRC) of 18 pieces of natural slate rock structural plane samples with size from 100mm to 1000mm were measured. The results show that it is necessary to evaluate the representativeness of rock joints in engineering practice due to the large non-uniformity of JRC. The total variation of JRC for different measurement sections, sizes and samples indicates that the sampling representativeness can be evaluated by the average value and the distribution probability of JRC; moreover, the sampling representativeness should be considered the statistical law evaluation of JRC for the concrete size and sample, and offered the accurate standard in changing range.

This paper employs Bumblebee2 stereo vision system to detect the obstacles for patrol robot in substation environment. Firstly, with the selected points in the disparity image, the ground plane is calculated by the RANSAC (Random Sample Consensus) algorithm. And then, the local occupancy grid map is built for patrol robot, and the obstacles are detected through connected component analysis method. The actual test in substation environment verified the reliability of the system.