With the widespread application of cameras in various industries, they have a significant effect on social security, crime prevention, and property protection. However, cameras also face pain points such as scattered locations, unstable power supply, difficult grounding, and high operation and maintenance costs.
To solve the above problems, monitoring chassis are generally installed in each area. The chassis undertakes functions such as power supply, communication, and lightning protection, and its importance cannot be ignored.
There are generally two types of power supply for the front-end monitoring chassis. The first is AC power supply, and the second is wind and solar complementary power supply. These two power supply methods need to be determined according to the specific application scenario.
AC power supply
The voltage of the mains varies depending on the country and region. The operating voltage of the KILOAMP smart chassis can cover different voltage levels such as 100-240VAC. The AC power can be converted into the DC power required by switches, cameras and other devices through the switching power supply or transformer in the chassis. The DC working voltage of different devices in the chassis mainly includes different voltages such as 5V/12V/24V/36V, which puts higher requirements on the switching power supply and conversion efficiency.
With the deepening of the concept of intelligent operation and maintenance, more and more users are no longer satisfied with the basic power distribution function of the chassis, but have put forward higher requirements for the input and output electrical parameter monitoring and remote intelligent control in the chassis. All electrical parameters and working status in the chassis can be connected to the platform, and predictive maintenance through AI algorithms will become a reality.
Wind-solar hybrid power generation
When the video surveillance point is remote and it is inconvenient to get electricity or the cost of getting electricity is very high, wind-solar hybrid power generation is a very good solution. This solution is more suitable for monitoring forests, rivers, pipelines, etc. The wind-solar hybrid power generation system is mainly composed of wind turbines, photovoltaic panels, controllers, RTUs, batteries, lightning protection, etc. It should be noted that the selection needs to be based on factors such as power consumption and battery life of cameras, RTUs and other equipment.
The communication module of the monitoring box is mainly realized through the switch, which is selected according to the number of front-end cameras, application scenarios, port types and rates, whether PoE power supply is required, and whether management functions are required.
Security switches generally range from 4 ports to 8 ports, with a transmission rate of 10/100/1000Mbps. Ensure that the switch meets the requirements of high bandwidth and efficient forwarding, and supports high and low temperature resistance, anti-interference, port lightning protection and other requirements. If the camera needs PoE power supply, the switch must also support PoE function. In addition, the switch needs to distinguish whether it has management functions. Non-network management switches support plug-and-play, and managed switches support VLAN, STP, QoS, port mirroring, etc., which are suitable for complex networks.
To ensure the stable operation of the monitoring box and the camera around the clock, outdoor cameras are mainly faced with challenges such as leakage, overcurrent, and lightning strikes. To avoid damage to the security system caused by these factors, reasonable measures are necessary.
When the leakage current generally exceeds 30mA, it will trip, and it is mainly protected by the leakage protector. Overcurrent protection is mainly achieved through fuses and circuit breakers. In addition, the lightning protection measures of the security monitoring box mainly include lightning protection inside the box and lightning protection grounding of the box. The lightning protection inside the box is mainly for the protection of the power supply and communication lines of the monitoring box. The power supply line includes the protection of the mains input and DC output ports, and the KILOAMP 40kA power supply lightning arrester is generally used. The communication line is mainly for the protection of the network port of the industrial switch in the monitoring box, and the KILOAMP 5kA network signal lightning arrester is generally used. In addition to the lightning protection inside the box, the most important thing is the lightning protection grounding of the monitoring box, because the lightning and surge energy absorbed in the box needs to be discharged to the ground through the lightning arrester. The grounding materials for security monitoring are generally hot-dip galvanized angle steel and flat steel, about 80cm below the cement foundation of the monitoring pole. The grounding resistance is generally required to be less than 10Ω, which is ideal.
In order to meet the user's intelligent operation and maintenance of the front-end camera, it is necessary to install the KILOAMP intelligent operation and maintenance host in the monitoring box, and each chassis can be monitored and controlled in real time through the intelligent operation and maintenance platform. The monitoring function mainly includes parameters such as current, voltage, power, temperature and humidity, door opening alarm, lightning protection failure, etc. in the box, and also supports the monitoring and control of the working status of switches and cameras.
According to statistics, the proportion of outdoor cameras downtime caused by leakage tripping and high temperature is the highest. When the front-end camera has leakage, according to the current standard, it generally exceeds 30mA, which is very likely to cause casualties. The power supply needs to be quickly cut off, and the switch can be closed after the fault is checked. The KILOAMP intelligent chassis can realize remote fault type diagnosis and troubleshooting, and can start and stop the fan according to the temperature in the box to realize the temperature control function, which can avoid equipment aging or crashes due to high temperature to the greatest extent. Through the reasonable intelligent operation and maintenance function of the intelligent chassis, users can save more than 80% of labor costs.
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