In order to fully understand the concept of mobile DVR, we must first grasp the notion of vehicle DVR (Vehicle DVR). As everyone knows, vehicles play a significant role in daily life. In general, people use vehicles to travel from point A to point B. There are many logistics companies that use vehicles to transport goods to their destinations. From our perspective, securing these situations is vitally important. A Mobile DVR has one of its prime functions in assisting to secure such events, safeguarding people’s flow and assets and ensuring the safety of traffic environments.
People frequently confuse general-purpose DVRs with mobile DVRs. The differences between the two are quite substantial. While a general-purpose DVR is designed to serve multiple purposes, a mobile DVR is specifically designed to function in vehicles such as buses, armored cars, and subways. As a result, a mobile DVR is far better than a regular DVR in many respects. For example, a mobile DVR is far less likely to fail because it will continue recording even when the power supply is unstable. In addition, a mobile DVR has a longer lifespan, and will provide more stable performance. These are just a few reasons why people should choose a mobile DVR instead of a general-purpose DVR.
In contrast to a regular DVR, a mobile DVR is meant to be used in an environment where its size cannot be taken for granted. This may sound rather confusing, but here are the differences between a regular and a mobile DVR.
1) Power Supply
As a mobile DVR, it needs to be located on the vehicle, so its power supply must be drawn from the vehicle itself. For vehicles, the voltage is currently 12V, 24V, 110V, and isn’t as stable as that in indoor locations, especially during engine start-up and braking when the voltage can drop to 9V or less. This creates an unstable power supply. So the mobile DVR needs to be able to support wide voltage input.
Electronics are very sensitive to power surges and spikes, and equipment fails quickly if they are not handled properly. The mobile DVR also acts as a hub that stabilizes power for sensors and cameras. But some manufacturers use cheap power supplies to save costs, but this inevitably shortens the life span of their products. So, identifying a mobile DVR with an excellent power supply is crucial. Here we list some international standards relating to power systems for your reference: ISO 7637-2: 2004, JASO D001-94, SAE-1455. Customers can refer to these standards when buying mobile DVRs.
2) Anti-vibration Mechanism
In today’s age, the only constant is change. It’s why you see the number of cars on the road rising every year. Constant motion requires a countermeasure to avoid failure. Manufacturers often use rubber to protect their designs from vibrations. Rubber is cheaper than wire rope. It also provides long-term performance; however, it wears out and can be damaged by heat and cold. Higher-end mobile DVRs use wire rope, which ensures performance no matter what the outside environment.
3) Dust Prevention and Heat Dissipation
When you consider the fact that mobile DVRs are generally installed in confined spaces and compartments, the challenge is to make sure that they aren’t exposed to dust or dirt. If you place fans inside the unit, you’ll inevitably leave a small opening in the enclosure, making it more vulnerable to dust and therefore less able to resist humidity. As a result, you won’t be able to use fans to cool the DVR. An alternative solution is to use aluminium alloys, which are cheaper than pure aluminium. However, these will prove unable to handle dust and heat adequately.
4) Solid Interface
With the constant vibrations that occur in cars and other vehicles, a solid connection between components is critical to ensure a steady and stable operating environment. A BNC connector is the standard for regular DVRs, but it is not suitable for mobile DVRs because BNC connectors can easily loosen if bumped frequently. The high-end mobile DVRs use an aviation specification interface that can withstand vibrations and ensure constant transmission of power, signals, and other data without failure. However, there are some manufacturers who use a common aviation specification interface, which is not eco-friendly and is not sufficiently solid; such interfaces can easily break down over time.
5) Data transmission
In the past, mobile DVRs were typically a weak link for many. They couldn’t perform many of the functions that modern surveillance systems can, such as transmitting the data they collect to a central station, or sending an alert when an accident occurs. They couldn’t communicate with each other, either, so they couldn’t talk to one another to see if one of them was about to break down.
But the advent of 3G and, now, 4G networks has enabled a whole host of new possibilities. Previously, they couldn’t transmit data collected from the vehicle in real-time, such as video, location, brake signals, speed and inertial measurements. But all of this is possible in a mobile DVR today, along with its ability to support the intercom functions too.
The above advantages and features have seen mobile DVR being widely used in the sector; Mobile DVRs are surely the best choice for mobile surveillance due to their professional design for use in vehicles. In view of traffic accidents, legal mandates have been formulated to strengthen surveillance protection. For this reason, the potential mobile surveillance market may become very large. Customers should be aware of the features of mobile DVRs, selecting appropriate solutions in different applications accordingly.
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