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FAQ

  • Reasons why a network camera cannot be viewed on the LAN

    1. First, check the power supply and network cable connections. Verify that the camera's indicator light is on and try pinging the camera's IP address.

    2. Check if the computer's IP address and the network camera's IP address are on the same network segment. An IP address consists of four sets of numbers separated by dots (e.g., 192.168.0.100 or 10.10.1.254). For most users, the address follows the format 192.168.X.X (where X ranges from 0 to 254); devices are on the same segment if the first three sets of numbers match. Within the same segment, every IP device (computer, network camera, or IP phone) must have a unique IP address to avoid conflicts. IP addresses can usually be changed manually on the device itself. If the computer and the network camera are on different segments, you must first change the computer's IP address to match the camera's segment.

    3. Confirm the network camera's IP address. If you are unsure, use the search tool provided with the camera to locate it (for example, the default IP address for Tianshida cameras is 192.168.1.2).

    4. Check if the camera's IP address is already in use by another device on the network. If so, connect the camera directly to your computer to change its IP address (or use the search tool to modify it), then reconnect it to the LAN switch.

    5. Ensure that the necessary video software (ActiveX control) for the network camera is installed on the monitoring computer.

    Note: Before installing the control, you must reset the Internet Explorer (IE) security settings to "Low" under "Custom level" (ensure ActiveX-related options are enabled). Then, enter the camera's IP address into IE; the system will prompt you to install the control—click "Yes." Once installed, enter the correct username and password (provided by the manufacturer) and click "Connect." Please note that most network cameras currently do not support server operating systems or Windows Vista.

  • Why can't the network camera still be viewed in the browser after configuration?

    This is because your computer's IP address and the network camera's IP address are not on the same network segment. If the network camera's IP address is 192.168.1.126 and the subnet mask is 255.255.255.0, then your computer's IP address must be within the range of 192.168.1.0 to 192.168.1.254, and the subnet mask must be 255.255.255.0.

  • What video compression method do IP network cameras use?

    IP network cameras utilize the international standard MPEG-4 video compression method.

  • What is the difference between a network camera and a standard webcam used for video chatting?

    A network camera consists of a computer, video server, network interface card, surveillance pan-tilt unit and controller, operating system, and web server software; consequently, it requires no additional PC or software—simply connecting the power and a LAN cable allows for remote video viewing. In contrast, a standard webcam lacks an internal server and relies on the user's PC operating system, resulting in significantly inferior performance regarding security and image quality compared to a network camera.

  • What are the advantages and disadvantages of using satellite remote sensing to monitor forest fires?

    Satellite remote sensing utilizes polar-orbiting meteorological satellites, land resource satellites, geostationary satellites, and low-orbit satellites to detect forest fires. These systems can identify hotspots, monitor fire spread, provide timely fire-scene information, generate forest fire risk forecasts, and estimate the area burned using digital satellite data.

    Advantages:

    They offer wide detection coverage, rapid data acquisition, and continuous data streams that capture the dynamic evolution of the fire; data collection is unaffected by terrain, and the imagery is realistic.

    Disadvantages:

    Accuracy is low, requiring significant ground-based manpower, material resources, and funding for verification—particularly in remote areas with poor accessibility, where verifying the fire situation is crucial.

    By the time a hotspot spans three pixels, the fire has essentially already become a major incident.

    The time lag between the satellite pass and notifying firefighting teams of the need for verification prevents effective early intervention (i.e., extinguishing the fire while it is still small and manageable).

  • What are the advantages and disadvantages of using aerial patrols for forest fire monitoring?

    Aerial patrol involves using patrol aircraft to detect forest fires.

    Advantages:

    It offers a wide field of view, high mobility, and rapid speed, enabling comprehensive observation of the fire site and the fire's progression, which allows for the timely implementation of effective measures.

    Disadvantages:

    Takeoff is difficult during the night, in high winds, or in overcast weather with poor visibility;

    Patrols are constrained by flight paths and schedules; the observation range is limited, typically allowing for only one pass over a specific forest area per day—meaning that if the optimal observation window is missed, a fire occurring that day might go undetected, potentially leading to a major disaster;

    Fixed flight costs are 2,000 yuan per hour, resulting in high overall expenses and costly aircraft rentals.

  • What are the communication methods in a forest fire monitoring system?

    There are three main communication methods used in forest fire prevention, generally combining wireless and wired connections.

    1. Wired

    Base stations located near urban areas can use this method, provided the cost of laying the wired cable is lower than the cost of microwave network construction.

    Wired communication is primarily used for communication between grassroots monitoring centers and higher-level monitoring centers.

    2. Microwave

    Microwave communication is used when the cost of laying the wired cable is higher than the cost of microwave network construction.

    3. 3G/4G Network

    This is more suitable for areas near urban areas or areas covered by 3G/4G networks.

  • How tall should the towers for the forest fire monitoring system be?

    There is no fixed standard for the height of the tower, but the following factors must be considered:


    The height of the tower is primarily determined by the terrain.


    Surveillance cameras on the base station should be positioned to provide a downward viewing angle over the monitored area.


    If the site is on a hilltop, a height of 6–10 meters is sufficient.


    In flat terrain, however, the tower height must be increased to 20–30 meters or even higher.


  • What is a multi-screen split controller?

    Using image compression and digital processing, several images are compressed into a single monitor screen at the same ratio. Some also have a built-in sequence switcher function, which can output and display the full-screen images input from each camera in sequence and at intervals on the monitor (similar to how a switching host switches images in turn), and can be recorded by a video recorder in the same order and at the same time.

  • What is a video switcher?

    A video switcher is a key component of the main control console in a control center, serving to select specific video signals. Simply put, it accepts multiple video signal inputs and, through user control, selects one of them for output. In video surveillance systems utilizing multiple cameras, it is generally unnecessary to employ a separate monitor for each camera to display its respective video signal.