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Security equipment under high temperature mode how to work properly

Security equipment under high temperature mode how to work properly

  • Categories:Industry News
  • Author:
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  • Time of issue:2016-06-27 00:00
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(Summary description)

Security equipment under high temperature mode how to work properly

(Summary description)

  • Categories:Industry News
  • Author:
  • Origin:
  • Time of issue:2016-06-27 00:00
  • Views:
Surveillance camera at high temperatures how to withstand "baked" test
First of all, the most widely used video surveillance, surveillance cameras have a lot of exposure to the sun, so the outdoor surveillance cameras and surveillance cameras, the installation must first consider the high temperature function. Surveillance camera how to achieve high temperature?
Optical lens itself is a very sophisticated device, too high or too low temperature environment will cause the lens due to thermal expansion and contraction of the tiny deformation, the deformation directly led to the inaccurate focus, the image is not clear. Good optical lens generally through the selection of materials with good temperature resistance and reasonable structural design to minimize the impact of temperature, so that the lens can better adapt to high temperatures, cold and other extreme weather. In today's HD trend, high-definition lens technology requires higher temperatures. In HD and megapixel camera technology, the transmittance directly affects the image quality of the lens, HD quality is an indispensable reference. Transmittance refers to the lens lens light transmission capacity, the main determinant of the lens material, can be improved by coating. The higher the lens transmittance, the clearer picture, translucent, the more able to adapt to low-light environment. Especially under the conditions of low temperature monitoring at night, the light transmission effect is already one of the important factors that determine the quality of the lens.
Under the circumstance of the temperature difference between day and night, the lens material is precisely the key component influenced by temperature. The materials used to make lenses are generally glass, resin and composite materials. Monitoring lens must be applied to glass lenses, this is because the resin and composite lenses in the high temperature exposure and cold temperature conditions easily aging, or even deformed, seriously affecting the imaging quality and life of the lens.
In order to ensure the high-definition lens effect, a good lens not only uses a special glass material, but also the application of aspheric molding technology. Aspheric lenses can effectively increase the amount of light transmitted through the edge of the lens and correct the blur caused by aberration of the spherical lens. However, the actual manufacturing process, limited to manufacturing technology and cost control, very few manufacturers will use the lens in the small focal length non-faceted lenses. Through the test can easily distinguish between the spherical lens and aspherical mirror, spherical mirror imaging edge will have a slight blur phenomenon, and the center of the spherical mirror and the edge is also clear.
LED display how summer heat
In hot weather, in addition to surveillance cameras, outdoor displays are also facing a great test. Outdoor LED electronic display is a common outdoor display device, the test of high temperature in summer, through the display of heat dissipation maintenance. Increase the display high temperature performance.
High temperatures have added to the difficulty of maintaining many outdoor LED electronic displays. Summer, outdoor full color LED display from the impact of high temperature, reasonable heat it. The following for the area of ???? 20 square feet and an area of ??more than 20 square LED display were given cooling advice.
20 square feet or less, according to different regions, north of Guangdong Province, 20 square LED display does not recommend the use of air conditioners, if conditions allow, the use of two small fans is sufficient. Guangdong, Guangxi, Hainan, Wuhan, Chongqing and other southern regions need to install two fans completely enough, the fan diameter of about 500mm, according to the size of the installation space to be.
More than 20 square LED display how to heat
1, if the LED display installation location is against the wall, look at how many LED display can protrude, if you can protrude a meter wall position, it is recommended to select the fan according to the size of the area, fan installation location on the side of the screen In the top of the order. If the customer to buy the LED display for the 80 square outdoor P16 LED full color screen, it is necessary to choose six diameter of about 600mm axial fan. Pay particular attention to ensuring that the blower is ventilated outside and equipped with a protective net to prevent personal injury from being absorbed by the technician repairing the display while the display is being repaired. In addition, outside the aluminum plate on the fan outlet equipped with aluminum shutters, you can achieve water-proof effect.
Wall-mounted full-color LED display can also be equipped with air conditioning, air conditioning to ensure that the host has a place to put, does not affect the overall appearance of the wall. Air conditioning options are required, the most commonly used is 1.5P, 2P and 3P air conditioning up to 12 square meters in the northern city of 1P air-conditioning calculations; southern city with 9 square 1P air-conditioning calculations. If the LED outdoor display area is relatively large, the air conditioner went directly to the manufacturer to customize, if the area is not big go to the store to buy the case, but the display cooling air conditioning is a caller compensation.
2, if the LED display installation is the use of column, it is best to use the fan to heat, the fan installed in the back of the big screen on top of the aluminum-plastic panels, the best up, made in the form of shutters in order to rain Rain does not enter the display. If it is double column, double blinds in the middle position to open a few shutters, the window is the air inlet, the fan above is the exhaust port, so that the formation of a complete air convection makes the cooling effect better.
Full color LED display maintenance programs, one to do the cooling measures, the second is to use should avoid improper operation. It is generally recommended to configure the fan or air conditioning to enhance the cooling function.
Storage hard drives also need cooling
In addition to these terminal devices exposed to high temperatures, security storage devices are generally not exposed to the sun. However, under the hot weather, the problem of cooling the storage device needs to be taken seriously. The temperature of the hard disk also affects the storage effect. In the earlier hard disk recorders and multi-drive storage devices are common. In the multi-hard disk storage devices, you can also place partition, add hard disk heat sink, hard disk cooling rack and other means of ventilation.
The reason why the hard disk will generate heat, one reason is that it's speed; the faster the speed of the hard disk heat generated is relatively high. The second is to continuously read and write data information. In the mass video data storage process, monitor the hard drive to maintain a stable storage speed, but because of the amount of data is too large, there is no "stop" work of the neutral, so you will find the hard drive temperature to maintain the "warmth" of the feeling, basically At this time the temperature has reached about 60 ℃.
Notebook hard drive often issued a hard disk overheating alarm signal, hard disk recorders obviously do not have such a feature. Hard drive unpredictable, which will affect the system? First of all, hard disk overheating naturally affects the efficiency of storage. After the working efficiency is reduced, the delay of recording speed and storage is not equal, so the meaning of real-time monitoring also ceases to exist. More serious situation, the hard drive temperature is too high, leading to system crashes or even the entire hard disk is destroyed.
In a home or residential surveillance system, a "spontaneous combustion" event caused by a hard drive overheating is not new. Taking into account the PC hard drive and monitor the hard drive price difference, most people hold "can save the province" mentality buy the PC hard drive installed in the video recorder, the hard disk boot in different ways, different speeds, different stability, which will greatly affect the hard disk As a result, important video data will not only be lost, the cost seems more expensive.
Network cabling in the heat can not be underestimated
There is also a place you may not expect, that is, the issue of cable cooling. Do not think that the small cable its heat dissipation problem can be neglected, in fact, it is clear that in the case of the power of the heat emitted, although not felt, but in a large number of complex cable networks, the heat can not be underestimated.
Troublesome cables in a limited space, the mutual cooling will make the ambient temperature rise, and when the ambient temperature increases, the transmission attenuation characteristics of the cable will be a corresponding increase, will directly affect the quality of cable transmission. This is also one of the common causes of frequent transmission quality failures on many complex networks. Troublesome network cabling has one thing in common, that is, a large number of different uses of the cable mixed together for different purposes mixed with cables prone to interference, will also affect the cooling,
Therefore, the network cabling design should consider the heat, should avoid excessive complexity, cabling construction should be professional operation, to avoid arbitrary changes, pay attention to the electromagnetic test acceptance, the last clever use of patch panels, cabling simple and orderly.

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