Entrance and exit traffic flow detection device and method based on ultrasonic radar array

Abstract

The invention provides an entrance and exit traffic flow detection device based on an ultrasonic radar array. The entrance and exit traffic flow detection device comprises a main control unit, an ultrasonic radar array, a communication unit and a power supply unit; the main control unit is connected with the ultrasonic radar array and the communication unit. The power supply unit is used for supplying power to the main control unit, the ultrasonic radar array and the communication unit. The main control unit is used for sending an instruction to the ultrasonic radar array; detection of vehicles entering and exiting the entrance is realized through distance detection data fed back by the ultrasonic radar array; the ultrasonic radar array comprises at least two ultrasonic radar probes whichare arranged on the side of a traffic lane and face different directions, one probe A is configured to obliquely face the vehicle driving-in direction of the traffic lane, and the other probe B is configured to obliquely face the vehicle driving-off direction of the traffic lane; the included angle between the two ultrasonic radar probes is configured to be capable of detecting the same vehicle atthe same time but incapable of detecting the same pedestrian at the same time. The traffic flow detection accuracy is high.

Description

technical field [0001] The invention relates to a vehicle flow detection device and method, in particular to a low-cost device and method for detecting traffic flow at the entrance and exit of a closed parking lot, and belongs to the technical field of intelligent transportation. Background technique [0002] Compared with foreign countries, the ratio of parking spaces to motor vehicles is mostly kept within a reasonable range of 1.3:1. The ratio of parking spaces to motor vehicles in my country is generally less than 0.8:1, and the ratio continues to decline with the increase in car ownership. Traffic congestion has become two prominent problems faced by urban traffic. Parking difficulties have become a serious problem in cities, especially large cities. [0003] The construction of a smart parking system is of great significance for improving the utilization efficiency of parking facilities, alleviating the insufficient supply of parking facilities, improving the managemen...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art, and to meet the dynamic data collection and access requirements of socially closed parking lots, to provide a vehicle flow detection device for entrances and exits based on ultrasonic radar arrays, and corresponding detection methods. The ultrasonic radar array composed of multiple ultrasonic radar probes realizes the detection of traffic flow, so that the calculation of the number of free parking spaces can be realized according to the statistics of the incoming and outgoing traffic flow, and the accurate calculation of the number of free parking spaces, traffic flow and turnover rate of closed social parking lots Collection; solves the problems of high cost and long cycle faced by the dynamic data access of existing social parking resources

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