Multi-sensor access device for acquisition of road traffic information and data fusion method thereof

Abstract

The invention provides a multi-sensor access device for collecting road traffic information, comprising a digital signal processor DSP, a complicated programmable logic device CPLD, a signal conditioning and transforming circuit, a CAN communication controller and a network communication controller. The sensor signal collected from the road traffic information is switched in CPLD via a current-voltage transformation circuit, a voltage frequency transformation circuit and a power level transformation circuit. The CPLD extends the access number of DSP signals and is provided with signal processing function. The invention also provides a method of merging and processing the multi-sensor data. The invention has the advantages that the invention realizes field-bus communication via the CAN communication controller, realizes that high capacity data communication with computers of a traffic management centre can switch in the sensor used by the road traffic information collection, simplifies sensor wiring and network transmission requirements, and reaches the effect that the traffic information detesting device is integrally formed and effect of detecting on a large scale.

Description

technical field [0001] The invention relates to the application of network technology, in particular to a multi-sensor access device for collecting road traffic information and a data fusion method thereof. Background technique [0002] At present, the road traffic system of large and medium-sized cities in my country has deployed a large number of traffic information sensors, such as coil, video, microwave, infrared, ultrasonic, temperature and humidity sensors, which have been initially satisfied. [0003] However, the current sensor deployment methods are independent of each other and belong to different systems. They cannot directly interact with data and provide comprehensive three-dimensional traffic information. The sensors have limited functions and cannot directly obtain interval traffic parameters and introduce weather information into traffic signal control. Since various applications in the traffic system require multi-source traffic information, the problems wit...

AI Technical Summary

Problems solved by technology

[0004] (1) Occupying huge network resources, each sensor must be equipped with a separate data transmission line, and the wiring work has become the main work of sensor deployment;

[0005] (2) Existing sensor deployment methods generate a large amount of heterogeneous data, but existing sensors lack online processing capabilities, and these data need to be uploaded to the traffic control center through the data transmission network, so the requirements for data transmission network resources are high;

[0006] (3) The mass data generated by the existing sensor deployment method has extremely high requirements on the processing capacity of the background system and leads to an increasing integration complexity for global comprehensive applications;

[0007] (4) Existing sensors lack online processing capabilities, and the traffic status information required by various applications of intelligent transportation systems cannot be obtained online, in real time, and accurately

Images