A method and system for detecting traffic flow at the entrance and exit of a parking lot

Abstract

The invention relates to a method for vehicle flow detection at an entrance and an exit of a parking lot and a system of the same. The method comprises the steps that (1) ADC data under a no-vehicle state is collected, and the data is used to realize initial calculation of an initial value; (2) when an electric signal indicating that a gate rod at the entrance or the exit of the parking lot is lifted is received, ADC sampling will be started, sampled data will be added into a buffer area, and a voltage average in the buffer area is calculated; (3) an average of the ADC data in the buffer area is calculated according to ADC data values which are sampled and read continuously, so that whether a vehicle state or the no-vehicle state exists is determined; and (4) a vehicle flow detection system sends vehicle pass state information to a could terminal server via a serial-port transparent transmission GPRS module. The system comprises an MCU processor module, a rod lifting detection module, a distance sensor module and the serial-port transparent transmission GPRS module. The method provided by the invention can accurately count a vehicle flow at the entrance and the exit of the parking lot so as to provide an effective solution for quantity statistics of static traffic parking lot stalls in an intelligent traffic system.

Description

technical field [0001] The invention belongs to a vehicle flow detection method and a system thereof, in particular to a parking lot entrance and exit vehicle flow detection method and a system thereof. Background technique [0002] With the rapid development of the economy and the surge in the number of cars, traffic congestion and frequent traffic accidents have caused more and more time wasting, property loss and environmental pollution. Traffic problems have become a common problem faced by governments around the world, including my country. one of the problems. In order to alleviate the pressure brought by economic development on transportation and maximize the effect of existing resources, the Chinese government has increased the research and construction of intelligent transportation systems. It is one of the most basic and key researches on static traffic direction in intelligent transportation. [0003] The commonly used international traffic flow at the entrance a...

AI Technical Summary

Problems solved by technology

The ground sense coil has high accuracy and simple structure, but it cannot be popularized and applied due to the need to dig roads for installation and maintenance; the geomagnetic field sensor is also high in accuracy and simple in structure, but it also needs to destroy the parking lot entrance and exit road surface during installation and need to dig out the timing Complicated battery replacement and maintenance hinder popularization and application; video detectors are costly and have low detection accuracy at night and in bad weather; microwaves are mostly used for vehicle speed detection on high-speed roads, and are easy to install, but are easily affected by the surrounding environment and difficult to detect. to promote

[0004] Based on the infrared intelligent counter, the physical counting is realized by means of infrared radiation. However, when objects such as people and tricycles enter and exit the entrance of the parking lot, error counts will also occur, which will affect the statistical accuracy of the vehicles at the entrance and exit of the parking lot. Therefore, the current parking lot entrance and exit vehicles There are large defects in the detection methods

Images