technical knowledge

19 2026-09

Linkage integration of video surveillance, access control, and alarm systems: interface methods and implementation points

This paper sorts out the four interface methods for linkage between surveillance and access control, intrusion alarm, fire protection and ot...

267  ·  2026-09-19 18 2026-09

Moiré and false color in surveillance images: lens and sensor matching issues

Explain the generation mechanism of moiré and false color, explain which scenes are likely to occur, and explain how to deal with it from le...

117  ·  2026-09-18 17 2026-09

Progressive transformation from analog to network: reusing coaxial and hybrid networking solutions

In view of the transformation needs of the built simulation system, the solutions of complete demolition and reconstruction and gradual tran...

115  ·  2026-09-17 16 2026-09

Lens dirt and protective window cleaning: invisible causes of image quality degradation

Analyze the impact of dust, rain traces, insect traces and the aging of the protective cover on the picture, and provide cleaning cycles and...

110  ·  2026-09-16 15 2026-09

Surveillance video as evidence: retrieval process, preservation and legal effect

Explain the conditions that surveillance video needs to meet to be used as effective evidence, including originality, completeness, time acc...

107  ·  2026-09-15 14 2026-09

Permission classification and desensitization of video data: who can watch and who can export

Explain the design method of permission model in video surveillance system, access control of sensitive areas, export approval and watermark...

104  ·  2026-09-14 13 2026-09

Security system level protection: What requirements should the video surveillance part meet?

Sort out the requirements directly related to the video surveillance system in MLPS 2.0, including identity authentication, access control,...

101  ·  2026-09-13 12 2026-09

Computer room dynamic environment monitoring: temperature and humidity, mains power, water leakage and smoke detector access

Explain which parameters need to be covered by power environment monitoring, how to connect sensors, how to set alarm thresholds, and why th...

98  ·  2026-09-12 11 2026-09

UPS selection and backup time calculation: Monitor how long it will last after a power outage

The calculation method of UPS capacity and backup time in monitoring scenarios, the difference between online and backup types, and the key...

95  ·  2026-09-11 10 2026-09

Redundant design of monitoring system: dual-machine hot standby, N+1 and link redundancy

From the device level, storage level to link level, it explains the protection scope, cost and applicable scale of different redundancy solu...

92  ·  2026-09-10 09 2026-09

National standard GB/T 28181 cascade: key points for docking between upper and lower platforms

Describes the application scenarios of 28181 cascading, planning of SIP domains and encoding rules, registration and heartbeat mechanisms, a...

87  ·  2026-09-09 08 2026-09

Remote monitoring of chain stores: cost comparison between VPN and dedicated lines

For chain scenarios with dozens to hundreds of stores, compare the differences in cost, bandwidth, and stability between VPN networking and...

84  ·  2026-09-08