The high-definition infrared conference camera has outstanding advantages such as long night vision distance, strong concealment and stable performance among surveillance cameras. An excellent high-definition infrared conference camera must be able to have the following five major performances, which are the five must-see factors for the selection of high-definition infrared conference cameras carefully summarized by R & D personnel.
1. Working conditions of infrared lamp
Generally speaking, the infrared lamp radiation power of a high-definition infrared conference camera is proportional to the forward working current, but when it is close to the maximum rating of the forward current, the temperature of the device rises due to the heat consumption of the current, which reduces the light emission power . Infrared diode current is too small, it will affect the performance of its radiated power, but too large operating current will affect its life, and even burn the infrared diode. When the voltage crosses the positive threshold voltage (about 0.8V), the current begins to flow, and it is a very steep curve, indicating that its working current requirement is very sensitive. Therefore, the working current is required to be accurate and stable, otherwise it will affect the performance of the radiated power and its reliability. The increase in radiant power with ambient temperature (including the increase in ambient temperature due to its own heat) will cause its radiant power to decrease. Infrared lamps, especially long-distance infrared lamps, heat consumption is a problem that should be noted when designing and selecting. Therefore, the use of high-definition infrared conference camera infrared light must have a good constant current power supply, good heat dissipation design. ZOOM's zoom MCD, MDD, MED, MBB series cameras are equipped with high-power infrared lamps (up to 24), and use high-power constant current power supply, internal circulation heat dissipation design, which can achieve long-distance night Sight (up to 220 meters away) and the long life of infrared lamps.
2. Fogging and frosting problem of high-definition infrared conference camera
The formation of fog and frost is caused by the condensation of saturated water vapor in the air, which is condensed into frost and fog due to the strength and weakness of the cold environment. During the work of high-definition infrared conference cameras, especially outdoor cameras, fog or frost is often formed on the window glass of the protective cover due to seasonal changes, day-night temperature differences, and rain and snow conditions, which causes the camera to be unable to see the objects directly, which directly affects monitoring effect. By adopting advanced electronic defrosting circuit, Zhonglu Communication Company can effectively control the concentration of saturated water vapor in the cavity to achieve automatic defrosting and defrosting.
3. Clean the window glass of high-definition infrared conference camera
The camera works in a rainy, snowy or dusty environment, and the window glass of the protective cover is prone to dirt, causing the camera's sight to be blocked. The solution is usually to add a wiper on the protective cover and clean the glass by controlling the wiper; another method is to use the invisible wiper window glass. Compared with ordinary window glass, invisible wiper window glass has the function of repelling water, dust and snowflakes.
4. Constant temperature of high-definition infrared conference camera
Due to the configuration of the infrared lamp with large heat generation, after the infrared lamp is started, there will be heat concentration in the front of the high-definition infrared conference camera during the entire working period (in 12 hours), that is, the front temperature of the cavity is too high. Even heat dissipation will definitely affect the normal operation of the camera and other components. By designing and using automatic cooling and heating air conditioners with forced heat dissipation and cooling, Zhonglu Communications has solved this problem well. The automatic cooling and heating air conditioner adopts the Peltier effect principle. The temperature measurement control circuit can be automatically adjusted to keep the temperature in the protective cover constant within the normal operating temperature range of the camera. The temperature in the cover is set to be below + 5 ° C for heating and above + 40 ° C cold. Experiments show that the high-definition infrared conference camera can work normally in the outdoor natural environment of -40 ℃ ~ +70 ℃ (direct sunlight).
5. Fully enclosed high-definition infrared conference camera
In addition to the constant temperature, another advantage of using automatic cooling and heating air conditioning is that the high-definition infrared conference camera can be made fully enclosed without leaving any heat dissipation holes to prevent the entry of dust, moisture, and corrosive gases, so that it can adapt to large dust Harsh environment, such as large coal mines can also be used normally.
Analysis of advantages and disadvantages of 4G industrial routers
First, what is the classification of industrial routers?
Industrial Router (a communication device that can be divided into 2G routers, 2.5G routers, 3G routers and 4G routers according to network standards.
For users, you can communicate with the Internet by setting a default gateway on your PC or network device. In fact, the default gateway configured for network devices is the packet export for network devices. After the packet is sent to the Ethernet port of the router, the router performs the next job, so the router is an Internet relay.
Second, how do industrial routers work
So how does the router forward the packet? Just like getting somewhere, you need to place a route. This route is a routing table. This routing table contains all the destination network addresses owned by the router, as well as the best path to reach those networks through the router. This is because there is a routing table, so the router can forward packets according to the routing table. That's how routers work.
Understand what is an industrial router and how it works, it is not difficult to understand the advantages and disadvantages of the router. Here we focus on the advantages and disadvantages of 4G industrial routers.
Third, the advantages of 4G industrial routers
For networks interconnected via single-protocol industrial-grade wireless routers, the same or different protocols can be used at layers 1-2. Layer 3 uses the same routable protocol and requires the same or compatible protocols at layer 4 and beyond.
Industrial routers can perform complex routing calculations and are suitable for connecting three or more large networks with complex network topologies.
Industrial-grade routers can isolate broadcast storm information in the source network, thereby reducing and mitigating the impact of broadcast storms.
Multiprotocol industrial wireless routers can be used as network interconnection platforms using different communication protocols because they can connect to the network using different communication protocols.
The entire network router can also be used as a bridge to handle non-routable protocols.
Industrial 4G routers enable you to isolate unnecessary communications so that the interconnected network maintains its own area of independent management and control, thereby improving network security performance. Therefore, industrial-grade 4G routers are commonly used as firewalls to restrict access to the internal and external networks (Internet) of the LAN, as well as the internal areas of the LAN, and act as network masking.
It can provide reliable transport and prioritization services, and industrial LTE routers do not need to maintain a persistent connection between networks that communicate with each other.
Complete Netcom router network segmentation improves network performance and reduces host load.
Third, the advantages of 4G industrial routers
High price
When installing an industrial LTE router, it is difficult to install and maintain due to the large number of initial configurations
If you spend more time processing, the transmission performance of the entire network of the industrial router will decrease.
Unlike Bridges, routers across industrial networks are protocol-related. Each advanced protocol used for network connectivity must be configured separately, and an industrial-grade network-grade router with a separate protocol for each protocol must be provided.
Industrial Netcom routers do not support non-routed protocols, so when interconnecting multiple networks, there are restrictions on the protocols used by the connected networks.
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Shenzhen MovingComm Technology Co., Ltd. , https://www.movingcommtech.com