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1. Project Overview
1.1. User unit
The main users of the project include the following types:
(1) Law enforcement officers: Law enforcement officers mainly refer to the relevant taxi inspection law enforcement officers of the Comprehensive Administrative Law Enforcement Bureau of Guangzhou Transportation Commission. Such users mainly use the system to conduct on-site inspection and law enforcement;
(2) Passenger transportation management department: mainly refers to the relevant management personnel of the Guangzhou Passenger Transportation Management Office, who can use the system to perform statistical analysis on the illegal operation of taxis in Guangzhou to achieve the purpose of industry supervision.
(3) Taxi companies: use smart top lights to manage taxis.
1.2. Project goals
The goal of the system is to adopt the wireless sensor network technology of the Internet of Things, through the working method of wireless identity recognition, and comprehensively utilize information technology means such as wireless identity recognition, vehicle GPS, and vehicle intelligent dome light to integrate wireless sensor network law enforcement terminals and taxi vehicle intelligent terminals With the resources of the taxi integrated management platform, we will construct and develop a taxi smart top-light law enforcement inspection system to meet the various law enforcement inspection methods of what you see is what you get.
The project is divided into two phases to advance the construction goals:
The first stage: Use wireless sensor network technology to build wireless sensor network law enforcement terminal equipment and taxi vehicle-mounted wireless sensor nodes that meet the short-range law enforcement, realize the close-range wireless sensing interaction between law enforcement terminal equipment and taxis, and achieve stability Reliable law enforcement functions;
The second stage: Effectively connect taxi smart top lights, wireless sensor network law enforcement terminal equipment, vehicle wireless sensor network nodes, vehicle smart terminals and background management platform, and build a taxi smart top light law enforcement inspection system to meet what you see A variety of law enforcement inspection methods that you get.
1.3. Project construction content
1) Construction content of the first phase of the project:
Construct wireless sensor network law enforcement terminal equipment and taxi vehicle-mounted wireless sensor nodes that meet the requirements of close-range law enforcement, realize the close-range wireless sensing interaction between law enforcement terminal equipment and taxis, and realize stable and reliable law enforcement functions.
2) Construction content of the second phase of the project
(1) Constructing taxi smart top lights, and developing the communication and control functions of taxi on-board terminals and smart top lights to meet the requirements of law enforcement inspections;
(2) Use the wireless sensor network communication of the law enforcement terminal to control the state of the smart top light of the taxi vehicle that realizes close-range interaction, so as to realize the law enforcement at close range; at the same time, use the taxi vehicle terminal, taxi information platform and GPS information, realize the intelligent dome light control function within the range.
2. Project background
2.1. Current situation
At present, taxi law enforcement inspections mainly focus on two types of violations. The first is the illegal operation of blue-brand private cars, which are mainly concentrated in railway stations, passenger stations and urban-rural areas. Such illegal activities are relatively hidden, and driving on the road is similar to normal. The operation of a private car is the same, and its illegal behavior can only be determined when the two parties negotiate a price;
The other is for cloned taxis and taxis that have already withdrawn from operation. The appearance of illegally operated taxis is the same as that of regular taxis. It is difficult for ordinary citizens to distinguish between them. They need to be compared and verified with background data in detail to determine them. Illegal operating status.
2.2. Main law enforcement methods
Law enforcement for illegal taxi operations mainly relies on on-site law enforcement methods. For illegally operating blue-brand private vehicles, law enforcement officers will conduct law enforcement and obtain evidence when the two parties negotiate prices or are suspected of illegal operation; for cloned taxis and taxis that have withdrawn from operation, Law enforcement officers use computers and handheld devices to enter the license plate number of the taxi, and obtain detailed information about the taxi under the license plate number (body color, operating status, affiliation, and operating qualifications of the driver) by communicating with the back-end taxi integrated management system. Certificate, etc.), so as to realize law enforcement inspection.
2.3. There are problems
The current taxi law enforcement inspections currently have the following problems:
(1) There is no unified taxi law enforcement inspection and analysis system to realize the macro statistical analysis of illegally operating vehicles in the city. It is necessary to use information technology to analyze the operating status and operating rules of illegally operating vehicles, so as to provide law enforcement officers with law enforcement assistance and improve Enforcement efficiency;
(2) For illegally operating blue-brand private cars, law enforcement officers can only carry out on-site law enforcement when the driver and the driver negotiate a price or are suspected of illegal operation. There is no information-based method to assist law enforcement;
(3) For illegally operating taxis (cloned taxis and taxis that have been withdrawn from operation), in terms of static law enforcement, for taxi vehicles gathered in a large area such as a station yard, it is necessary to manually enter the license plate numbers one by one. Information verification is inefficient, and first-line law enforcement personnel are strong; in terms of dynamic law enforcement, one is that manual input is difficult and dangerous when the vehicle is driving, and the other is that the input time is long, the efficiency of law enforcement is low, and it is easy to lose track. Target.
3. Project construction ideas
3.1. Wireless sensing law enforcement methods
Using short-range wireless sensor network technology, install the short-range wireless sensor network node equipment on the taxi to make it meet the short-range sensing function. Law enforcement officers use wireless sensing law enforcement terminal equipment to obtain taxis within a certain range Law enforcement signals emitted by vehicle tags, and parse law enforcement information into taxi license plate information, and obtain detailed information about taxis and drivers, so as to realize law enforcement inspections;
For short-distance taxis, the camera on the law enforcement terminal can be used to automatically scan the taxi license plate, and the system automatically compares the taxi license plate and the vehicle node license plate information to determine the consistency of the two.
4. Project implementation plan
4.1. Technical Route
4.1.1. Related technologies
4.1.1.1. Internet of Things Technology
According to the principles of information generation, transmission, processing and application, the Internet of Things can be divided into 4 layers: perception and recognition layer, network construction layer, management service layer and comprehensive application layer.
1) Perceptual recognition layer. It is the core technology of the Internet of Things and the link between the physical world and the information world. The perceptual recognition layer includes both radio frequency identification (RFID), wireless sensor network and other automatic information generation equipment, as well as various intelligent electronic products for artificial information generation.
2) Network construction layer. The main function is to connect lower-layer data to the Internet for use by upper-layer services.
3) Management service layer. Organize large-scale data efficiently and reliably to provide an intelligent support platform for upper-level industry applications.
4) Comprehensive application layer. Provide various application services.
The core and foundation of “Internet of Things technology” is still “Internet technology”, which is a kind of network technology that is extended and expanded on the basis of Internet technology; its user end extends and extends to any item and item for information exchange and communication .
4.1.1.2. 2.45GHz active long-distance identification technology
As a typical application of the Internet of Things, wireless sensor networks have received very extensive attention in recent years, and a series of communication protocols have also been developed on it. These protocols take into account the low power consumption and low complexity requirements of the sensor network, and have also played a great role in the design of the Internet of Things communication protocol.
4.2. Implementation of law enforcement scenarios
4.2.1. Wireless sensing law enforcement methods
Using short-range wireless sensor network technology, install the short-range wireless sensor network equipment on the taxi to make it meet the short-range sensing function. Vehicle-mounted node signals communicate to obtain detailed information about taxis and drivers, so as to implement law enforcement inspections.
Wireless sensor network technology, namely WSN (wireless sensor network), is the key technology of the Internet of Things. The WSN network is composed of a large number of cheap micro sensor nodes deployed in the monitoring area, and a self-organizing network formed through wireless communication. MEMS-based micro-sensing technology and wireless networking technology have given broad application prospects to wireless sensor networks. The sensor network will be able to expand the ability of people to remotely interact with the real world. The wireless sensor network can monitor and collect the information of various monitoring objects in the network distribution area in real time to realize the complex target monitoring and tracking within the specified range. It has the characteristics of rapid deployment and strong survivability, and has broad application prospects.
The first phase of the project is to build a vehicle-mounted WSN chip node and a handheld mobile law enforcement inspection terminal. Its node equipment is used as the communication core of the vehicle system. Through the handheld mobile law enforcement inspection terminal, it communicates with the monitoring background and service center to achieve linkage early warning, industry supervision and value-added Serve. It mainly realizes short-range communication with a handheld mobile law enforcement inspection terminal and feeds back vehicle equipment information. The short-range communication recognition distance is about 100 meters.
The main enforcement methods are as follows:
Law enforcement officers use wireless sensing law enforcement terminals to communicate with taxi in-vehicle nodes within a certain range (range can be configured);
Law enforcement officers use the camera of the law enforcement terminal to scan the taxi license plate information, and the system automatically recognizes the license plate information;
After the wireless sensor law enforcement terminal receives the vehicle-mounted node information, it parses it into taxi license plate data information, and law enforcement officers can conduct preliminary law enforcement inspections based on the license plate information;
The system compares and screens the license plate information recognized by the camera with the on-board node information to determine the legitimacy of the vehicle;
Law enforcement officers can send the analyzed license plate data information to the background system;
The background system sends detailed information about the taxi and the driver to the law enforcement terminal based on the license plate data.
4.3. Software function realization
4.3.1. Law enforcement equipment management
It is mainly used to realize the management functions of the project’s law enforcement terminal equipment, on-board sensor node issuance, recovery, information configuration, etc., and at the same time realize the data docking function with the taxi integrated management platform.
4.3.2. Enforcement information inquiry
Realize the unified query function of sensor network law enforcement data, including realizing the query function of license plate number, law enforcement terminal ID, tag ID, time period and other fields; realizing dynamic law enforcement information query, static law enforcement information query, law enforcement fence information, law enforcement top light status Information, detailed law enforcement status query function.
4.3.3. Law enforcement information management
It is mainly used to realize the information management and configuration functions of the smart dome light, including:
Law enforcement information editing, to realize the editing and modification of the law enforcement content of the smart top light;
Law enforcement information release, realize the function of law enforcement information release, including configuration functions such as release scope, release company, release status, etc.;
4.3.4. Statistical analysis
Realize the analysis function of related wireless sensor law enforcement information.
4.3.5. Wireless sensing law enforcement terminal
The wireless sensing law enforcement terminal can communicate with the on-board nodes of the taxi within a short distance (the range is configurable), and parse it into the taxi license plate information. At the same time, it can communicate with the system backend to achieve detailed information query and comparison. Features include:
Wireless sensor network information communication function: two-way communication with wireless sensor network vehicle nodes within the configuration range, and realize the signal analysis function;
Law enforcement information sending: Send the taxi license plate information analyzed by the signal to the system background, communicate with the background, and obtain detailed taxi information;
GPS positioning function: the system locates the current position in real time, and realizes sending the position information to the system platform;
Law enforcement information setting: Law enforcement information setting includes static law enforcement range setting, smart dome light display status setting, etc.;
Law enforcement information sending: send law enforcement location information and law enforcement dome light setting information to the system background to realize the function of issuing law enforcement information;
Enforcement information inquiry and analysis: inquiry and analysis of relevant law enforcement information.
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