What is an Uptime Monitor?

Surveillance system is one of the most widely used systems in security systems. Nowadays, more suitable construction site monitoring systems on the market are handheld video communication equipment. Video surveillance is now mainstream. From the earliest analog surveillance to the fiery digital surveillance of previous years and then to the ascendant network video surveillance, great changes have taken place. With the gradual unification of IP technology globally today, we need to re-understand the development history of video surveillance systems. From a technical point of view, the development of video surveillance systems is divided into the first generation of analog video surveillance systems (CCTV), the second generation of "PC + Multimedia Card" -based digital video surveillance systems (DVR), and the third generation of completely IP-based video surveillance System (IPVS).

General monitoring system

The composition mainly includes the front part of the control section: camera, lens,

Introduction

The design and implementation of the monitoring station is the focus of the development of the entire wireless remote monitoring system. The ability and accuracy of the monitoring station for information and data processing will affect the final performance of the entire system. Throughout the development process, the design of the monitoring station was the part with the largest workload and the longest time required. The monitoring station is located at the work site and only completes data collection, processing, and control. The tasks are relatively single and fixed, and do not need to be completed with a large desktop. Considering energy saving and ease of deployment, the monitoring stations are mostly embedded systems. The complexity of the design of the monitoring station and the specific technology used are different depending on the functions to be implemented in the entire wireless remote monitoring system and the requirements for data processing and sensor control capabilities.

MCU-based design

The use of a single-chip microcomputer is the first choice when designing most embedded systems. Due to the abundant peripherals integrated on the chip and good control ability, the single chip microcomputer is designed for embedded systems, and has occupied the largest share in the embedded market.

The design scheme based on the single-chip microcomputer is generally suitable for remote monitoring systems with low data processing requirements and small calculation amount. According to the needs, the microcontroller can choose a lower-end 4-bit machine or an 8-bit machine, such as 8051, or a special-purpose chip with stronger functions, such as the MSP430FE42X series. The single chip microcomputer is mainly used for system control of the monitoring station. Off-chip memories are generally RAM, EEPROM, and Flash; I / O devices are generally keyboards, LCDs, and other human-machine interaction interfaces for design and debugging; sensors are generally devices such as microphones, cameras, speakers, and servo motors. The implementation of wireless communication interfaces is relatively complex. Codecs are trade-offs and are generally not necessary for low-rate data. According to the system's processing tasks and information types,

System event security considerations

The equipment should be kept clean and dust-proof during daily use, and must not be turned on and off frequently. For example: Do nt shut down the system immediately after turning on the system. This will damage the equipment more easily. Although you have noticed this in the system control and writing the program and provided some protection functions, please pay attention when using it. The host and video processing system of the central integrated control system can be powered on for a long time.

Introduction

After a monitoring system enters the commissioning phase, trial operation phase, and after delivery, there may be failures such as: abnormal operation, the system does not meet the technical specifications of the design requirements, and the overall performance and quality are not ideal, that is, Some "soft spots". These problems are inevitable for a monitoring project, especially for a complex, large-scale monitoring project.

Introduction

The image preview quality is very important in the monitoring system. No playback of the video. The main job of the monitoring system manager is to watch the monitoring image in real time. The sharpness of the image quality and the image size affect whether the manager can detect suspicious situations in a timely manner, and there are cases. After the occurrence, the criminal suspect can be clearly identified.

What affects image quality

Chip

Many manufacturers on the market use the same compression chip, and the image quality varies. This is the reason why the algorithms are different, and why the original data is different after image compression, and whether the original data is optimized after image compression will affect image quality. In the domestic soft compression field, the most widely used chip is PHLIPS. 71XX series chip, the image of 71XX series is clear.

I. Composition and implementation of network video surveillance system

The unattended computer room environmental dynamic monitoring system mainly monitors the operating status of the equipment in the computer room (such as power supply and distribution systems, UPS power supplies, air conditioning, fire protection systems, security access control systems, etc.), the environmental dynamic status of the equipment operation, and records the history. The data can realize the management functions of the five remote (remote measurement, remote signaling, remote control, remote adjustment, and remote monitoring) of the computer room, make the computer room monitoring unattended or unattended, and provide a powerful guarantee for the efficient management and safe operation of the computer room.

Traditional video surveillance systems are limited by technological development and can only perform on-site monitoring. Simple alarm information transmission cannot transmit video signals over long distances. Throughout the market, various security manufacturers have launched computer room environment and power monitoring systems based on TCP / IP networks. Among them, the computer room environment monitoring system based on the network video server will be the development direction of the unattended computer room monitoring system. The following will introduce the reader to its system composition and implementation and functional characteristics.

System composition and implementation

The unattended computer room environment monitoring system based on the network video server can be divided into two parts: the front-end computer room monitoring site and the background monitoring center.

It is divided into three parts by function: front-end signal acquisition and processing part, signal transmission part, and background control (monitoring center) part.

Front-end signal acquisition and processing part

Dome cameras are installed in the machine room to observe the overall condition of the entire machine room. Hemisphere cameras are installed at the entrances and entrances of the gates and corridors to observe the entry and exit of personnel in the entire passageway, and are installed as required. Acquisition equipment.

Some monitoring sites are installed with smoke detectors, infrared alarm detectors, and perimeter alarm devices.

Signal transmission part

Usually there is a 2Mbps E1 channel from the front-end monitoring point to the monitoring center. The video server transmits the image and related environmental dynamic monitoring data to the monitoring center through the E1 private network.

Background control (monitoring center) section

A central monitoring server is configured in the monitoring center, which is responsible for managing all cameras, video servers, environmental dynamics monitoring, alarm equipment, alarm recording, electronic maps, etc. in the front end, and managing all online monitoring users in the back end.

Functional features of the system

The unmanned computer room environment dynamic monitoring system based on the network video server not only requires perfect monitoring functions, but also requires 24-hour uninterrupted environmental dynamic monitoring, comprehensive alarm processing, and can generate various voice alarms, real-time curves, and history. Reports, etc., can also use the short message alarm module to implement the SMS alarm notification function when an alarm occurs. Even if the center is empty, the alarm information can be transmitted to the relevant management personnel.

Intelligent surveillance is an embedded video server that integrates intelligent behavior recognition algorithms, which can identify and judge the behavior of people or vehicles in the scene, and generate alarms to alert users under appropriate conditions.

There is a view in the industry that "security monitoring, IP is the prerequisite for high-definition, and high-definition is the foundation of intelligence." For this, we can understand that the industry's high-definition is based on the IPC method, even if it has been very hot in the past two years HD-SDI high-definition solution, but it is also a small-scale application, and intelligent video analysis and intelligent control require high-definition video source as a collection and analysis sample, so you can also think that intelligence will be the highest-end development direction of security. ^[1]