Residential Sectional Garage Door
A typical version of an overhead garage door used in the past would have been built as a one-piece panel.The panel was mounted on each side with unequal parallelogram style hinge lifting mechanism. Newer versions of overhead garage doors are now generally built from several panels hinged together that roll along a system of tracks guided by rollers. The door is balanced by either a torsion spring system or a pair of extension springs.A remote controlled motorized mechanism for opening garage doors adds convenience, safety, and security
• Aluminum garage doors are low-cost, light, rust-proof, and feature low-maintenance. They are prone to denting because aluminum is not strong and they are energy-inefficient since aluminum is a highly conductivematerial.
• Fiberglass and vinyl garage doors are composite units, combining a steel core behind a fiberglass or vinyl skin. They have also polyurethane insulated base sections, or other type of foam insulation. These premium doors can match steel garage doors, and be a realistic imitation of wood (namely fiberglass units), but they may be more expensive than steel units.
• Steel doors have become common and are available in a variety of sizes and styles, provide strength and security, are cost-competitive, and may have optional insulating value. Extra strength is available with two or three layers of galvanized steel with a low gauge number (23-24 gauge steel panels).
• Wood garage doors offer aesthetic appeal, but they are high-maintenance and may be expensive. Low-priced wood garage doors may warp and break easily.
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Intelligent Bus Vehicle Monitoring System Composition and Function
With the increasing awareness of safety among people, public transportation security has become a major concern for the general public. As a vital component of urban transport, public buses are the preferred choice for low-carbon and eco-friendly travel, promoted by both the government and citizens. However, due to its public nature, urban bus systems often face challenges in terms of safety and security management, leaving many blind spots. To address these issues, government agencies and transport companies urgently need to implement wireless video surveillance systems to monitor and manage the operation of urban buses effectively. This not only ensures passenger safety but also helps prevent crimes and protect people's lives and property.
**System Components:**
The system is composed of three main parts: the terminal vehicle monitoring system, the video monitoring platform, and the bus dispatching system. The terminal vehicle monitoring system includes a wireless car DVR, vehicle cameras, on-board microphones, an in-vehicle display, GPS device, and a reporting station. The wireless car DVR can be activated either by the vehicle’s ignition or through a timer switch. It compresses and encodes the video captured by the camera and transmits it in real time to the video monitoring platform via a wireless network. The GPS system allows for real-time tracking of the vehicle’s location and trajectory, enabling intelligent management of vehicle data. Additionally, the car DVR can store high-definition video locally on the hard drive. When the bus reaches the terminal, staff can retrieve the video data by swapping the hard drive or using Wi-Fi to download the files wirelessly. Management personnel can then use a video playback client to review the footage.
**System Functions:**
During operation, the system enables real-time monitoring of the vehicle’s status. Through a 3G network, remote users can view live video from inside the bus, track the vehicle’s route, and monitor its current condition. Vehicle managers can remotely observe the driver’s behavior and the surrounding environment, quickly identify issues such as unauthorized stops or inappropriate boarding, and communicate with the driver directly. They can also issue commands and make temporary adjustments to schedules.
The GIS map display function allows real-time positioning and monitoring of the vehicle using GPS. It enhances the map functionality to provide synchronized display of the video feed and the vehicle’s location, offering a comprehensive and intelligent monitoring platform.
The alarm data remote backup feature automatically uploads recorded video during alarms to the server, ensuring dual storage on both local and remote servers. This guarantees the security of critical video data and provides accurate evidence for investigations into accidents or disputes.
The speed limit warning function uses voice prompts to alert drivers about safe driving practices. It allows different speed limits to be set for various road sections. If the vehicle exceeds the limit, an automatic voice alert is triggered through the car horn, and the incident is immediately sent to the traffic command center for record-keeping and future inspection.
Finally, the system supports wireless uploading of video data. When the bus arrives at the terminal, there is no need to manually replace the hard drive. Instead, Wi-Fi automatically uploads the day’s video files to the server, allowing managers to review historical records of the vehicle’s operation. This helps identify issues such as random parking or unauthorized boarding and enables automatic archiving of operational data.