Shulou(Shulou.com)06/03 Report--

I. Overview

People's Park is located in the most prosperous area in central Shanghai, and the main Garden Gate is located at 231 Nanjing West Road. The park is adjacent to Nanjing West Road in the north, Shanghai Municipal people's Government and people's Square in the south, Huangpi North Road in the west and Xizang Middle Road in the east.

The people's Park was nominated by the then Mayor Chen Yi and opened on October 1, 1952. In 2000, large-scale reconstruction was carried out in conjunction with municipal construction, and it took on a new look. It has an area of 10 hectares. The plant configuration is original, planting more than 200 kinds of trees. The winding bridge divides the waterscape into lotus pond and emerald lake, and the waterfalls and streams of small bridge and flowing water and Xishan scenic area give tourists a sense of joy. The Antarctic Stone, the statue of Zhang Side and the May 30th Monument have become symbols of young people's patriotic education.

The people's Park also has an art museum, a mini but complete "Happy Valley", antique old buildings such as the International Hotel and Daguang Cinema in the north, and a new urban skyline composed of skyscrapers in the south. It is regarded by many people as the "Central Park" of Shanghai.

The dynamic monitoring of passenger flow can be carried out in many ways. One way is to use mobile phone signals for detection, but because mobile phone signals belong to three major operators, it is difficult to integrate multi-source data; at the same time, the positioning accuracy of mobile phone signals is low. It is difficult to accurately estimate the number of people in the venue space, and there is nothing we can do to detect the extreme passenger flow in the local space. Another way is to use technical means for passenger flow statistics and estimation, the main technical means include infrared and video. At present, with the development of computer vision technology, the use of video means for passenger flow monitoring and statistics has become a trend.

The statistics and detection of passenger flow by video means are mainly divided into monocular and binocular, monocular way through the installation of general video cameras, according to the analysis of video signals to obtain information such as the number or density of passenger flow, but due to the limitations of its technology, the current statistical accuracy is low. Binocular technology uses binocular stereo vision technology, through a special binocular stereo vision hardware device, can achieve high-precision passenger flow counting, which is the most advanced technology in video passenger flow statistics.

Through years of careful research, the Intelligent City Research Institute of Shanghai University has successfully developed the latest passenger flow counter based on stereo vision technology, which can be used in entrances and exits with different heights and widths, adapt to different complex environments, and achieve a counting accuracy of more than 98%, which provides a high-precision detection means for National Exhibition and Convention Center's passenger flow statistics and detection. It makes real-time detection and early warning of people flow possible.

This scheme is based on binocular stereo vision passenger flow counter, and deploys passenger flow counter at key nodes such as entrances and corridors of stadiums (including halls, commercial centers). Through the statistical management software in the background, the number of passengers in each entrance, venue and corridor is detected in real time, and the dynamic number of visitors to each venue is accurately counted, based on which passenger flow statistics and prediction are carried out. Once the extreme overcrowding is found, an early warning signal will be issued in time.

II. System scheme

1. System objectives

Through accurate counting of passenger flow at the entrances and exits of the park, statistics of dynamic passenger flow data in and out of the park and space within the park, backstage passenger flow statistics and big data mining, to provide accurate statistics and technical support for the daily passenger flow management and security of the park; at the same time, set up multi-level passenger flow early warning threshold, when passenger flow exceeds the early warning value, trigger different management plans.

2. General overview of the system

The system deploys binocular stereo vision passenger flow counter at the entrance and exit of the park, collects the number of passengers in and out of the park in real time, transmits the passenger flow data to the backstage data processing center in real time through wireless WIFI network / 4G/ optical fiber, and stores and analyzes the passenger flow data in time. It includes the early warning of sudden large passenger flow, the statistics of dynamic visitors in the park, the statistics of time and place of visitors, the dynamic prediction of passenger flow, the mining of the law of dynamic change of passenger flow, and so on.

The following is a schematic diagram of the entire system:

Fig. 1 system schematic diagram

3. System hardware

(1) passenger flow counter

This system adopts the passenger flow counter based on binocular stereo vision newly developed by the Intelligent City Research Institute of Shanghai University. The main performance indicators are attached, and the technical indicators are in the leading level in China.

The counter adopts the principle of binocular stereo vision, the counter is installed in the center of the upper edge of the door frame, and the camera is vertically downward. The relationship between the installation of the counter and the camera viewing angle, detection area, etc., is shown in figure 2 (the installation height of the diagram is about 2.2m, and the horizontal width of the detection area is about 1.4m, usually corresponding to the situation of the bus door). For different detection widths, you only need to increase the installation height or change the lens focal length of the equipment, which can meet the installation requirements of most doors. For ultra-wide (> 4m) entry and exit, multiple counters can be installed in the same door.

Fig. 2 camera viewing angle and passenger flow detection area

(2) Communication network

The counter can be connected to wired (supporting POE) and wireless networks. In order to facilitate installation and use, the network of this system is proposed to use the existing WIFI network, and the equipment supports static or dynamic IP addresses. As long as it is connected to the WIFI network, the database server of the data center can automatically receive real-time counting data.

(3) data processing center

The data processing center receives, stores and processes counting data, and is equipped with a database server, a Web server, a big data processing computer and a large screen display.

The database server stores and manages passenger flow collection and statistical data. The Web server is equipped with the application software of the Bard S mode, so that the system application personnel can query all kinds of information through the networked computer at any time.

Big data processes the count data in real time by the computer, carries out early warning processing, and sends out early warning messages in a timely manner by means of Wechat and short messages. The computer is equipped with a large screen display to graphically display dynamic passenger flow information.

(4) Mobile terminal

Mobile terminals can be notebooks, iPad, mobile phones, etc., through authorized users to achieve system data query and system management.

4. System software

(1) big data processing software

The software implements the following functions:

Graphical display of real-time passenger flow data: timely reflect dynamic passenger flow and statistical information with a visual interface

Early warning processing: detect abnormal data and send out early warning information in a timely manner

Data statistics: generate all kinds of statistical charts

Big data mining: passenger flow trend prediction, passenger flow dynamic change law mining and so on.

(2) Web server software

The software manages and queries the system through Web, and its functions include:

System user management: user management, rights management, etc.

System counter management: install site, IP address, counter parameter settings, etc.

Data display: real-time counting data display, statistical reports, etc.

Early warning shows: early warning of abnormal passenger traffic.

(3) manage mobile software

Realize the similar function of Web server in the form of mobile phone APP.

5. Main performance index of binocular stereo vision counter.

Name: Binocular passenger flow counter

Function: suitable for counting incoming and outgoing passenger flow in the range of doors or entrances and exits

Size: 18075.542 (mm)

Applicable ambient temperature:-10-40 (℃)

Installation height: 2.0-4.0 (m)

Detection width: stand-alone 1.0-4.0 (m) (slightly different according to installation height and lens focal length), can be combined with multiple machines to achieve arbitrary width detection

Power access: DC 12-24V

Data interface: RJ-45,RS-485

Supplementary light function: dark light environment has its own infrared supplementary light lamp, which can ensure the counting brightness of less than 2.5m.

Counting accuracy: > 98% (fixed venues), > 90% (mobile vehicles such as buses)

Counter setting: PC PCS program or IE browser

PCS program system requirements: Windows XP and above Windows system

Browser version requirements: IE9.0 or above

PCS program functions: real-time display of incoming and outgoing passenger flow, real-time display of collection screen, adjustment of multiple counting parameters, recording of passenger flow video, communication settings with other host computers, etc. (so these parameters can also be set through IE browser)

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