| The process of handling traffic accidents is mainly divided into three stages: The first is investigation and evidence-taking of the traffic accident scene, the second is reason-analyzing and process -analyzing of traffic accident, the third is duty-affirming of traffic accident according to the result of analysis. In above three stages, the first stage work completes in traffic accident scene. The duration time of the the first stage decides the degree of the traffic affected directly. Currently, the general method of our police departments in investigation of traffic accidents is: firstly, close off part or all driveways of the traffic accident scene, then inspectors investigate the traffic accident scene by tape measure, photos and eye-measure and etc. Lastly, resume the traffic after taking the detail and entire evidence. This kind of method of handling the traffic accident can get enough material, but also exits obvious limitations. The first is obvious influence of the traffic, if the traffic accident is serious, the length of the car in road may reach a few kilometers. The next in order is that the automatization degree of this kind of method is not high, affected by the artificial factor, having certain difficulty in storing ,creating and searching files of traffic accident scene, also having difficulty in reconstruction and reappear stereo scene, having the problem of the low accuracy of measured data. At the same, the environment, weather and time can affect the result of measure. Therefore, improving the means of the traditional traffic accident investigation is necessary.Currently, the main measure methods used in traffic accident scene investigation include: Tape Measure, Total Stations, Laser Units, Global Postitoning System, Photogrammetry. Among them Photogrammetry is divided into stereo camera photogrammetry and common camera Photogrammetry.In 1933, Swiss police station adopted stereo camera Photogrammetry in investigation of traffic accident scene firstly, then European police stations such as Germany, Italy, England etc. also had a part adoption. Nowadays, the nation of applying stereo camera Photogrammetry most extensively is Japan. The main advantages of using stereo camera Photogrammetry are: better image quality, accurate and quick ability of resuming traffic accident scene. The weaknesses of using stereo camera Photogrammetry are: higher cost, difficult equipments operation and maintenance, it can't operate smoothly if not through special training, and it also need specially person take care of and use.The use of photogrammetry by law enforcement agencies for the investigation of traffic accidents is still a relatively new and under-test method. Because of rapid development of computer technique and digital cameras, it makes computer hardware cost drop fast, and also because common camera Photogrammetry software become more and more mature, the country such as America ,Canada and etc. have more and more interest in using common camera Photogrammetry in investigation of traffic accident scene. At present, law enforcement agencies for the investigation of traffic accidents such as Washington, Arizona, Utah, Nevada, California, Oregon, Honolulu are testing the method actively. The result of the test shows: as to the Total Stations method used these days in US, the common camera Photogrammetry method is relatively simple to operate, easy to learn, lower cost, and higher accuracy. At the same time, the common camera Photogrammetry method has its special advantages: investigation time-saving, analysis of measure data needed in photo at any time, include tyre mark, blood block and etc. which are easy to lose. The common camera Photogrammetry method will be potentially replace the Total Stations method in the future and become the main method used in investigation of traffic accident scene, other methods are just used when the common camera Photogrammetry method have some difficulty.Based on the sub-item" Research on Traffic Accident Scene Fast Investigation Technique "of...
|
PDF Full Text Request