Electronic ** development history and demand trends

Electronic Police Development Course and Demand Trend The development of electronic police has made great contributions to the traffic security. The electronic police system adopts video dynamic detection technology, visual identification technology, computer image processing technology, communication technology and automatic control technology, and database technology. It uses high-definition CCD cameras as detection sensors to process dynamic traffic video images in real time. Let us take a look at the technological development process and technology demand trend of the electronic police.

The Electronic Police Development Process Today, the electronic police system is constantly being updated and developed, both technically and on hardware. The electronic police system has undergone five stages of implementation.

The first stage (before 2001)

The starting stage of the electronic police system is "digital camera + ground coil" as the implementation method, although it can capture illegal vehicles, but this method uses a civilian digital camera to capture, the stability is poor, and after the equipment is damaged, the manufacturers generally do not Responsible for maintenance; Second, due to the rapid upgrading of digital cameras, digital cameras of the same type are difficult to find in a year or two; and digital cameras can not achieve continuous capture, the system can not achieve bayonet functionality. In addition, this method uses the sense coil (induction bar) to trigger, need to place the sense coil (induction bar) at the front end, and the sense coil is the need to cut the ring slot in the lane, and then bury the induction coil (or induction bar ). When the vehicle passes through the induction coil, it will send a signal to the corresponding equipment. The detection is more accurate. However, due to the need to bury the induction coil in the ground, this increases the difficulty of construction and also increases the cost of the project. And the trouble is that when the road surface is changed and channelized, it is necessary to reburial the coil. In addition, the high-latitude cold-freezing period, low-latitude summer roads, and places with poor road quality have huge maintenance work on the coils, and the coils need to be replaced again after a period of time, and the construction and maintenance costs are quite high.

The second phase (2001-2005)

The electronic police system at this stage uses the "standard definition camera + digital camera" as the implementation method. With the advancement of technology, standard definition cameras are available on the market, making it possible to detect red lights illegally by analyzing video directly. This implementation avoids the shortcomings of the ground coils, but it still uses civilian digital cameras for snapshots, which have problems of poor stability, rapid replacement, and manufacturers generally not responsible for maintenance. In addition, the digital camera cannot achieve continuous capture, and the electronic police can only achieve a single capture of illegal red light.

The third stage (2006 ~ 2007)

At this time, the implementation of the electronic police system was changed from "standard definition camera + digital camera" to "standard definition camera + standard definition camera." As industrial-grade SD cameras directly replace civilian digital cameras, they avoid the disadvantages of using digital cameras, and the performance is relatively stable. However, due to the low definition pixels of the SDTV camera, the maximum image resolution is 768 × 576. Although it can meet the basic management requirements for vehicle detection, it still cannot see the license plate and the red light signal at the same time. It is also useful for public security agencies to check off vehicles and decks. The driver’s facial features such as vehicles and blacklisted vehicles are even more stretched. And the amount of construction is also large. One lane needs a camera for close-ups.

The fourth stage (2008-2009)

At this stage, there are mainly two ways to implement the electronic police system: high-definition CMOS camera + ground coil, standard definition camera + high-definition CMOS camera. Due to the industrial HD CMOS camera, the camera's performance is stable. At the same time, the camera can capture continuously to achieve bayonet monitoring and other functions. However, due to the high imaging performance of the HD CMOS camera (insensitivity to light changes, sometimes the camera can't see the traffic lights, affecting the post-punishment), the frame rate is low (commonly 2 to 3 frames/sec, video analysis vehicle behavior and video cannot be implemented. The shortcomings of the feature, etc., still do not achieve the desired results.

The fifth stage (2010 ~)

With the popularization of high frame rate HD CCD cameras and the constant optimization of video analysis algorithms, the electronic police system at this stage is mainly implemented as “HD industrial CCD camera”. Following the release of GA/T496-2004 "General Technical Conditions for Automatic Recording System for Red Lights" and GA/T497-2004 "General Technical Conditions for Intelligent Detection and Recording Systems for Road Vehicles" issued by the Ministry of Public Security in 2004, in order to further regulate the use of traffic monitoring by public security traffic management departments. In 2009, the Ministry of Public Security re-launched GA/T496-2009 “General Technical Conditions for Automatic Recording System for Red Lights” and GA/T497-2009 “General Technical Conditions for Intelligent Detection and Recording Systems for Road Vehicles”. May 1st implementation to replace the original standard. The new standard puts forward higher requirements on the system's image clarity, response speed, intelligence, and picture storage formats. From the perspective of image quality, only license plate images of a single lane can be captured, and standard definition equipment that fails to take into account the characteristics of the vehicle and the driver’s facial features will gradually fade out of the stage of history and will be replaced by high-definition equipment.

Trends in Electronic Police Needs Interpretation In addition to the well-used functions and good performance of the electronic police system, the following practical application indicators are also needed.

1. Reliability and stability of reliability systems have always been the focus of the electronic police system. The higher the degree of complexity of system integration, it is bound to involve the compatibility of products among various manufacturers. The cooperation of cameras, lenses, fill lights, and even the back-end transmission, processing, and storage will all affect the stability and overall performance of the overall integrated system. At present, the biggest factor that causes the MTBF (mean time between failures) of the system is the fill light. The decay of the fill light performance and the short life are the killers of the MTBF.

Nowadays, all-in-one machines have emerged and gradually began to occupy the market. Higher integration, easier use, and lower failure rate make the all-in-one machine more advantageous in terms of stability. The reduction of fill light is also a trend to enhance system stability and reliability.

As the cost of the all-in-one machine is reduced, the all-in-one machine will gradually be accepted by the market and widely promoted. With the increasing application of EIDOF lens, the requirements for fill light will be lower and lower. It is believed that this will provide more stable and better performance for the electronic police system.

2. Reduce operating costs and reduce life-cycle costs The control of costs is a key issue for each integrator, project provider and end-user. With the increase in the integration of electronic police systems, the reduction in the use of fill light has brought new possibilities for reducing system costs.

· Reduce operating costs Operating costs in the electronic police industry are mainly represented by the costs of installation, maintenance, repair and replacement of the overall system. In the existing system, once a problem arises, the engineering company can only arrange the engineer to go to the site for processing. The use of the high-vehicle and the replacement of some components make the operating cost often occupy a large proportion of the cost of the integrator.

Reduced life-cycle cost life-cycle costs, in the electronic police industry, mainly refer to the cost of replacing and maintaining the system within the service life of the product. In existing systems, component failures often require the direct replacement of new products, especially the fill light. In the five-year warranty period, it is difficult to ensure that the fill light can always maintain a good light-filling ability, which often needs to be replaced within 5 years. One or two fill lights, which results in a large lifetime cost.

Therefore, with the continuous development of electronic police, it is required to reduce the overall complexity of the system, use more advanced technical means, while meeting the evolving needs of the electronic police, while eliminating the unnecessary components, reducing the overall operating costs of the system And the cost of life, and get a more stable system, more accurate images.

With the continuous updating of electronic police technology, new problems are constantly highlighted. However, some inherent problems still need to be solved. A new EIDOF technology, Aperture depth of field and joint extension technology, presents a brand-new approach to these issues from the lens end. Solutions.

EIDOF technology is an information optical imaging technology. It is the next-generation optical imaging technology. It has the characteristics of achieving large aperture and large depth of field at the same time, which makes a large aperture like F/#=1.0 can still guarantee an effective working depth of field. Large aperture has its practical application value. This can well solve the problem of low-light imaging, increase the amount of light passing through the system from the source, reduce the system's need and dependence on fill light, and reduce the complexity of the system, thereby reducing the overall system effect while reducing its Operating costs and life-cycle costs. It provides a new and effective solution for electronic police to achieve better application value, higher work efficiency and better system combination.

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