Car monitoring system application principle and function
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The on-board monitoring and control system is a three-tier networked supervision framework, consisting of vehicle terminals, transmission networks, and monitoring centers. It offers a range of functionalities such as anti-theft and anti-robbery protection, real-time tracking of driving routes, wireless transmission of video footage from inside and outside the vehicle, quick response to accidents, and emergency command capabilities. This system is specifically designed to address the challenges of managing a fleet of vehicles dynamically.
At the heart of this system is the vehicle-mounted video server, which connects 3–4 cameras. The server compresses audio and video signals into digital streams and transmits them via EDGE, CDMA2000 1x, or Wi-Fi networks to the monitoring center, enabling real-time visual monitoring. To optimize performance, it uses dual-stream technology: local recordings are stored in D1 resolution, while transmitted video uses CIF, QVGA, or QCIF resolution for efficient data transfer.
**1. Vehicle Terminal**
The vehicle terminal acts as the front-end device of the monitoring system, typically installed in various types of vehicles. It includes components like a video server, an LCD touch screen, external cameras, a call controller, and an alarm system. The video server captures and encodes both local and remote video streams, supporting real-time remote monitoring and emergency command. Users can retrieve recorded data either through the USB port on the terminal or remotely using EV-DO (CDMA2000 1x, Wi-Fi) connections.
**2. Monitoring Center**
The monitoring center serves as the central hub for dispatching and command. It provides a remote platform for visual monitoring, two-way audio-video communication, and real-time tracking of all connected vehicles. An electronic map displays vehicle locations, and operators can remotely control pan-tilt units on the vehicle’s cameras. The center also links with police and emergency services, enabling rapid response during critical incidents.
**3. Transmission Network**
Unlike fixed monitoring systems that use wired networks, on-board monitoring relies on wireless communication. China Telecom’s mobile network is ideal for transmitting audio and video data across wide areas, ensuring reliable connectivity even in remote locations.
**Key Functions of the Car Monitoring System**
(1) **Real-Time Video Monitoring**: The monitoring center can view live video feeds from multiple channels.
(2) **Video Storage and Playback**: The system supports multi-level storage, including local hard disk recording and remote upload.
(3) **Car Alarm Linkage**: Includes external alarm buttons and two-way voice calls for emergency reporting.
(4) **GPS Positioning**: Built-in GPS tracks vehicle movement and provides detailed operational insights.
**Features of On-Board Monitoring**
The system supports monitoring through various devices, such as PCs, video walls, and mobile phones. It enables remote browsing, PTZ control, multi-screen viewing, manual recording, and playback. Mobile monitoring allows users to access live video and control camera functions via 3G-enabled smartphones.
Additional features include distributed monitoring with centralized management, integrated wireless video servers, dual-stream encoding, H.264 compression, high bandwidth support, and strong scalability.
**Vehicle Monitoring Key Points**
(1) **Networked Vehicle Monitoring**: Using telecom CDMA networks, the system collects and transmits real-time video to the monitoring center. The vehicle terminal includes a GPS module for positioning and navigation.
(2) **System Stability and Shock Absorption**: On-board equipment must be robust, with low power consumption and resistance to interference. Hard disk protection technology is used to prevent damage from vibrations.
(3) **Onboard Value-Added Services**: In addition to security, the system offers entertainment features like radio, TV, and pre-recorded content, enhancing passenger experience and creating new revenue opportunities.
**Mobile Vehicle Monitoring Application Scenarios**
This system is widely used in buses, police cars, armored vehicles, fire engines, sanitation trucks, and other emergency vehicles. It supports door monitoring, road condition tracking, and scene-specific configurations at the monitoring center.
**Business Needs and Functional Requirements**
Users require real-time video transmission, accurate analysis, and remote command capabilities. The system must support driving monitoring, distress alerts, storage and playback, and onboard entertainment. It also includes hands-free calling, passenger records, and emergency call features.
**Target User Groups**
The main users include public transport companies, financial institutions, logistics firms, government agencies, and emergency services. It also applies to private cars, hazardous material transports, and medical ambulances.
**Business Positioning of Mobile Monitoring Products**
The on-board monitoring market is growing rapidly. Focusing on bus monitoring, traffic enforcement, and emergency services will drive adoption. As 3G and 4G technologies advance, the system will expand further, offering more value-added services and improving public safety and efficiency.