Traffic flow detector based on WIFI signals

Abstract

The invention discloses a traffic flow detector based on WIFI signals, which includes a power supply module, a signal receiving / sending module and a temporary storage module, wherein: the signal receiving / sending module is divided into a host module and an extension module; the signal receiving / sending module When the / transmission module is used as an extension module, it acts as a basic sensor and listens to and receives broadcast data packets sent by mobile devices in the surrounding environment based on the WIFI protocol, and transmits the broadcast data packets to the data processing module for deletion and reading, and will include the ID number and the data of the extension module number are transmitted to the host module; when the signal receiving / sending module is used as the host module, it is used to receive the data transmitted by the extension module and stamp it; the temporary storage module is used to store the data processed by the host module data. The invention has the advantages of convenient installation, low cost, low power consumption, high stability and reliability, and does not need additional equipment such as a GPS signal generator installed on the vehicle.

Description

technical field [0001] The invention belongs to the technical field of traffic flow detection, in particular to a vehicle flow detection device in environments such as expressways. Background technique [0002] Traffic flow data is an important source of information for the traffic operation dispatching command system, which can provide decision-making basis for command dispatching, traffic flow control and traffic guidance. There are many kinds of existing traffic flow detection technologies, which can be divided into contact detection methods and non-contact detection methods according to the installation method. Among them, the contact detection technology includes piezoelectric, pressure tube detection and loop coil detection. The main disadvantage of this technology is that the service life of the detector is short due to the rolling of the vehicle on the road. When the detector is deployed, it is necessary to interrupt the traffic and damage the road surface. Therefor...

AI Technical Summary

Problems solved by technology

[0007] Disadvantages: The rolling of the vehicle on the road leads to a short service life, difficult installation and maintenance, interruption of traffic, damage to the road surface, and high cost of use

But this method has an obvious defect, that is, the researchers install the GPS positioning module on the motor vehicle, that is to say, the vehicle must install and use the module, which is mandatory and may infringe the legitimate rights and interests of others

And for now, the installation cost of its GPS positioning module is relatively high. Even in developed countries like the United States, only high-end cars will have this module.

Therefore, this monitoring method has certain operability difficulties in terms of sampling rate and sample volume.

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