From today's life, the use of video optical transceivers is increasingly important. In some monitoring and alarming information, the optical transceiver is the best choice for people, and it provides good help to some people who do not know the situation. This can also avoid some accidents. Therefore, the role of video optical transceivers in security surveillance is very large.
Security surveillance engineering is characterized by monitoring distribution points. The security monitoring point usually transmits real-time and non-compressed monitoring images to police stations or bureaus through optical fibers. The clarity, real-time performance, reliability, and cost-effectiveness of the images are particularly important. The optical transceiver as a fiber-optic communication device for transmitting images, its reliability, high and low temperature characteristics and real-time performance play an important role in the entire security monitoring and control project quality. How to choose the security monitoring optical transceiver, the following points can be used as a reference:
1, cost-effective security monitoring project monitoring point more, financial pressure, most of the township government financial or self-financing to complete, requiring low cost, while requiring reliability, high-quality engineering, which for the majority of project owners and owners Brought great pressure. At present, there are many kinds of optical transceivers on the market, and the price quality is uneven, and the quality is uneven. Some unscrupulous manufacturers took the opportunity to use the analog optical transceiver to charge digital optical transceivers. They even used the optical transceivers with low price and extremely poor temperature coefficients to split old chips and old optical modules to encrust owners and contractors. These manufacturers usually have only a few people. Workshops, without any testing equipment and complete production processes to ensure that, let alone spend nearly a million dollars to purchase international video professional standard testing equipment such as the United States Tektronix VM700 and other equipment. In general, the cost of digital optical transceivers for high-volume, standard production processes to produce a pair of high-performance single-channel video and reverse pan/tilt control data is generally around two thousand yuan. At present, the problem of quality, maintenance, and other after-effects caused by ultra-low-cost, low-quality optical transceivers has exploded in a large area. The constant accumulation of endless maintenance costs for optical transceivers has greatly exceeded the cost savings in low-cost projects, causing many owners to agonize; but it is worth fortunate. It is the rule that owners and contractors are sober and mature, rational and low-price in pursuit of low prices from the past. The rule of winning low bids has been discarded by most owners. Cost-effective and low-maintenance rates have become the default game rules.
2, no compression, real-time transmission We all know that the image after the compression of the image pixels are lost, affect the clarity, while important due to image compression calculation, transmission takes time, on-site real-time image transmission down monitoring command center delay, and law and order Monitoring parts such as catching, escaping, and driving cars are all moving at high speeds. High-speed moving images require a large amount of compression time, and at the same time, the image quality will be reduced if a mosaic phenomenon occurs. A very small delay will greatly affect high-speed movement. The reality is greatly reduced at the scene. Therefore, security monitoring is rarely used for image compression. Generally, real-time non-compression optical transceivers are used to transmit surveillance images.
3, high stability, high reliability Optical transceivers are generally placed outdoors, not only to endure summer equipment box harsh high temperature (up to 70 degrees Celsius) and the winter cold in winter (below -20 degrees Celsius), as well as damp, rain, fog, snow, etc. Severe weather. As we all know, optical devices used in optical transceivers are extremely sensitive to temperature, so the extremely fragile temperature characteristics of analog optical transceivers make them unable to work in such harsh environments. Digital optical transceivers are easily insensitive because of their insensitivity to temperature, and of course digital Opto-electronics should select various components of industrial temperature coefficient, which must be strictly screened.
4, high-definition, high signal-to-noise ratio Because the security monitoring point is mostly in the first time on the scene of the scene, emergencies, real-time monitoring, so the quality of the image transmission is very important, the traditional analog optical transceiver because of the use of low-level simulation FM, AM and phasing technology, so the image resolution is low, modulation noise, large intermodulation interference, signal to noise ratio is also very low, can not meet the needs; and the use of digital optical transceivers, due to the use of digital transmission and encoding, no analog modulation, it is It is easy to get a high signal-to-noise ratio.
Security surveillance engineering is characterized by monitoring distribution points. The security monitoring point usually transmits real-time and non-compressed monitoring images to police stations or bureaus through optical fibers. The clarity, real-time performance, reliability, and cost-effectiveness of the images are particularly important. The optical transceiver as a fiber-optic communication device for transmitting images, its reliability, high and low temperature characteristics and real-time performance play an important role in the entire security monitoring and control project quality. How to choose the security monitoring optical transceiver, the following points can be used as a reference:
1, cost-effective security monitoring project monitoring point more, financial pressure, most of the township government financial or self-financing to complete, requiring low cost, while requiring reliability, high-quality engineering, which for the majority of project owners and owners Brought great pressure. At present, there are many kinds of optical transceivers on the market, and the price quality is uneven, and the quality is uneven. Some unscrupulous manufacturers took the opportunity to use the analog optical transceiver to charge digital optical transceivers. They even used the optical transceivers with low price and extremely poor temperature coefficients to split old chips and old optical modules to encrust owners and contractors. These manufacturers usually have only a few people. Workshops, without any testing equipment and complete production processes to ensure that, let alone spend nearly a million dollars to purchase international video professional standard testing equipment such as the United States Tektronix VM700 and other equipment. In general, the cost of digital optical transceivers for high-volume, standard production processes to produce a pair of high-performance single-channel video and reverse pan/tilt control data is generally around two thousand yuan. At present, the problem of quality, maintenance, and other after-effects caused by ultra-low-cost, low-quality optical transceivers has exploded in a large area. The constant accumulation of endless maintenance costs for optical transceivers has greatly exceeded the cost savings in low-cost projects, causing many owners to agonize; but it is worth fortunate. It is the rule that owners and contractors are sober and mature, rational and low-price in pursuit of low prices from the past. The rule of winning low bids has been discarded by most owners. Cost-effective and low-maintenance rates have become the default game rules.
2, no compression, real-time transmission We all know that the image after the compression of the image pixels are lost, affect the clarity, while important due to image compression calculation, transmission takes time, on-site real-time image transmission down monitoring command center delay, and law and order Monitoring parts such as catching, escaping, and driving cars are all moving at high speeds. High-speed moving images require a large amount of compression time, and at the same time, the image quality will be reduced if a mosaic phenomenon occurs. A very small delay will greatly affect high-speed movement. The reality is greatly reduced at the scene. Therefore, security monitoring is rarely used for image compression. Generally, real-time non-compression optical transceivers are used to transmit surveillance images.
3, high stability, high reliability Optical transceivers are generally placed outdoors, not only to endure summer equipment box harsh high temperature (up to 70 degrees Celsius) and the winter cold in winter (below -20 degrees Celsius), as well as damp, rain, fog, snow, etc. Severe weather. As we all know, optical devices used in optical transceivers are extremely sensitive to temperature, so the extremely fragile temperature characteristics of analog optical transceivers make them unable to work in such harsh environments. Digital optical transceivers are easily insensitive because of their insensitivity to temperature, and of course digital Opto-electronics should select various components of industrial temperature coefficient, which must be strictly screened.
4, high-definition, high signal-to-noise ratio Because the security monitoring point is mostly in the first time on the scene of the scene, emergencies, real-time monitoring, so the quality of the image transmission is very important, the traditional analog optical transceiver because of the use of low-level simulation FM, AM and phasing technology, so the image resolution is low, modulation noise, large intermodulation interference, signal to noise ratio is also very low, can not meet the needs; and the use of digital optical transceivers, due to the use of digital transmission and encoding, no analog modulation, it is It is easy to get a high signal-to-noise ratio.
News source: http://
Wheel Hub Assembly,Hub Bearing Assembly,Wheel Bearing Hub Assembly,Wheel Bearing And Hub Assembly
SHAOXING ZHENGHONG AUTO PARTS CO.LTD , https://www.kontinental-bearing.com