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A technology of intelligent transportation and investigator, applied in the field of traffic information, can solve problems such as low utilization rate, limited applicability and flexibility, and large investment, and achieve the effects of easy portability, manpower saving, and powerful processing functions
Inactive Publication Date: 2008-09-24
SUN YAT SEN UNIV +1
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Problems solved by technology
The application of mechanical survey method can save a lot of manpower, is easy to use, has high precision, and can obtain a large amount of relatively reliable data. However, this method generally requires a large amount of investment, the utilization rate is often not high, and the applicability and flexibility are serious. restricted
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example 1
[0079] In Example 1, assume that the date is April 17, and the initial time is 14:10:10. The description of the incremental method to store data is as follows:
[0080] First record the current date and specific boot time. The initial date and initial time are shown in Table 1 and Table 2 respectively:
[0081] 1
61
[0082] Table 1 is the initial date storage format
[0083] 2
38
216
[0084] Table 2 is the initial time storage format
[0085] The initial date is calculated as: 1×256+161×1=417, which is April 17;
[0086] The initial time is calculated as: 2×65536+38×256+216×1=141010, that is, 14:10:10.
example 2
[0087] Example 2: When the vehicle license plate is investigated on the spot, the specific time when the "386" key is pressed is "14:25:18 on April 17", and the license plate and the specific time are stored.
[0088] The original record of Example 2 is "386, 0417142518". In the incremental method, two bytes are used to record the vehicle type "386", and the subsequent time data "0417142518" can use the initial date saved on the investigator and the initial time are simplified, as shown in Table 3.
[0089] 1
130
5
228
[0090] Table 3 Incremental Method Example 2 Storage Format
[0091]The first two bytes represent the vehicle volume license plate (three): 1 * 256+130 * 1=386;
[0092] The third four bytes represent the time difference, and the calculation is the same as in Example 1.
[0093] It can be seen from the above that using the incremental data storage structure, each data only needs to occupy 4 bytes of storage space, a 64kbit...
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Abstract
The invention discloses an intelligent traffic investigator, consisting of a data acquisition module, a data communication module and a data processing module. An initial data is gathered at first by the data acquisition module, i.e. the investigator, and then is outputted by the data communication module through a receiving serial port, and saved into a computer in the form of a database; finally, the data processing module extracts the traffic informations recorded on the intelligent traffic investigator such as traffic volume, the journey time and the time of a signal lamp, etc., and processes the corresponding information according to a definition of a user, thereby realizing automation and intellectualization of the data post-processing of a traffic investigation. The intelligent traffic investigator of the invention has the advantages of simple and exquisite structure, easy carrying and easy and convenient operation, thereby being convenient for performing the on-the-spot data acquisition; and a software for processing the data in the investigator takes a normal computer as a carrier and has a powerful processing function, thereby being capable of obtaining the final processed data accurately and quickly.
Description
technical field [0001] The present invention is to develop a set of traffic investigation equipment that can flexibly collect traffic information and intelligently process the information. technology field. Background technique [0002] Traffic survey is an objective means to know the traffic status. It is the basic way to obtain traffic data and a necessary step for traffic status analysis, traffic planning and route improvement, and traffic theory testing. It can be said that traffic survey is a very ordinary and extremely important basic work. [0003] Traffic surveys cover a wide range of content and a heavy workload, and survey objects are multi-level and multi-category. However, according to the survey participants, they can be divided into two categories: manual survey methods and mechanical survey methods. Among them, the manual survey method refers to surveys that require simple survey equipment, and data collection and processing are mainly done manually. This m...
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