AbstractThe process of assessing the similarity of the velocity of the vehicle running on the same route is important for applications to control the speed of the car, or the early detection of the abnormal speed of a vehicle is being observed. At present, the transport of goods and passengers can be public record information velocity and position of the vehicle and this information can be sent on to the operating stations in real time. Exploring the information will find out what the speed of the car, or come up with a môtíp of the velocity variation in a particular area or line somehow. In real time applications, the process of comparison and found the need to conduct continuous and less time consuming calculations. In this paper, we use dynamic time Helix technologies (DWT) to measure the similarity between two 2 's speed record cars running on the same supply line. With this technique, the record maximum speed will not require the same density are recorded, the volume calculation does not much and is applicable to the following real-time car journey. IntrodutionIn fact, we surveyed the route passengers from HCMC to Nha Trang, National Highway 1A in this bustling and vibrant travel through many cities, highways, the junction complex. Each such area has a top speed of which the driver must follow. For example, when on a Sunday, driving to reduce speed from 80 kmh to 50 kmh and accelerated after the out of town; or even if there is no limit to the speed, the driver will also have increased the velocity decreases behavior when passed through a curve, or in an area with certain events. In fact, not a car that can keep abreast of maximum frame speed is specified which is less than a certain value. Moreover, the transfer between the regions have different rules velocity is not instantaneous but will gradually increasing (or decreasing). The process of evaluating the analogy of a car's speed chain X when passing through an area with the string velocity is noted by the other cars at the time of a few hours or a few days earlier will lead to the conclusion that car X is on the move represents the car or have abnormalities. At the point of operation, the control center can be an early warning about the X and can proceed with the timely actions required to stop the car and checked the car or the psychology of driving. Chain speed are recorded by the black box mounted in the car, the black box can have a frequency record various information, such as a black box records the following speed points every 20 seconds while a black box that can only burn speed points every 120 seconds. This leads to the problem is on the same supply line, the score recorded speed of each device is different. Further, each may take some time to go through that path. Current work.Trong [1] việc xác định sự tương quan của nhiều điểm vận tốc từ các bản ghi khác nhau dựa vào kỹ thuật phân vùng (segment). Trong đó, một phân vùng được định nghĩa là phần diện tích dọc theo cung đường có độ dài l nào đó mà chúng ta đang quan sát. Mọi điểm vận tốc (li, vi) có li nằm phía trong phần diện tích S được xem là có liên quan với nhau và được so sánh giá trị với nhau. Do sự biến thiên của vận tốc, một phân vùng không thể quá dài, điều đó dẫn đến việc phải chia một cung đường ra làm nhiều phân vùng, và thao tác xác định một điểm vận tốc nào đó thuộc về phân vùng nào chiếm rất nhiều thời gian tính toán.
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