Speed ​​Ball Technical Features and Application Notes

With the general public awareness of security increasing and the need for security increasingly urgent, how to provide a stable social security environment and an orderly and harmonious working and living atmosphere have become the focus of government work. To build an effective social security prevention and control system, naturally, all kinds of security products can not be separated. As the front-end monitoring front in the security system, the market demand for high-speed ball is increasingly evident.
High Speed ​​Ball Technical Features
The birth history of the high-speed ball is not long, but it has the advantages of compact appearance, flexible control, and intelligence, which has won the favor of users. Many dome makers are also increasing the research and development of high-speed domes, and now the high-speed balls made by various manufacturers. The basic control functions are relatively mature. The diversity of functions, networking, and intelligence can be said to be the main trend of current fastball product development.
High-speed ball is a high-tech product involving optics, machinery, electronics, etc., high-speed scanning of preset points, high-speed low-speed capture, preset point inspection, and privacy area hiding, proportional control features, click to enlarge Tracing, alarm linkage, Chinese character superposition, wide dynamics and other features all determine the quality of a high-speed ball. The basic support for all performance is mainly integrated camera with zoom lens, electronic slip ring and high-performance stepper motor. performance.
High-speed ball as the front-end equipment of the surveillance system, whether the imaging is clear and whether the focus is accurate and rapid is a key indicator, and this depends on a key component selected by the product, the integrated camera. The performance of the integrated camera is mainly reflected in whether the imaging is clear, whether the focus is accurate and rapid, and zoom, color, and resolution.
Stepping motor is also one of the key components of high-speed ball movement. High-speed ball development engineers pay great attention to the process of stepper motor drive when developing high-speed ball. Differential pulse technology is used to control the rotation angle and speed so that the high-speed ball can be accurately positioned and A good feel, the best indicator of performance is the lowest speed control level and preset point accuracy.
The third key component of the integrated dome camera is the brush. It ensures that the integrated smart dome delivers accurate video signals and control signals when continuously rotating 360 degrees horizontally.
The horizontal and vertical motions of the high-speed ball are respectively performed by two stepping motors. Various movement commands issued by the center matrix to the high-speed ball are all achieved through a microprocessor-driven motor. The quality of the motor determines the high-speed ball. All the parameters of the motion, such as high-speed scanning of preset points, high-speed low-speed capture, cruise queues, pattern scanning, automatic tracking, and the accuracy of click-magnification, all depend on the processing and precise control of the motor. The degree of image jitter at the minimum speed control can reflect the performance of the high-speed ball; the precision of the preset point also depends on the precision of the mechanical structure and the performance and control level of the stepper motor. It can be said that the motor control level can be It truly reflects the level of high-speed production of the enterprise.
In terms of electromechanical control, the SCM still has certain advantages. However, in digital processing and algorithm control, DSPs often have the irreplaceable advantages of single-chip microcomputers. Pure DSP as a motor processor we think it is difficult to completely replace the microcontroller, but now DSP embedded CPU core, also has a motor control peripheral functions, can better control algorithm, DSP core processing capabilities can reach 400MIPS or more. Compared with the microcontroller, DSP devices have a higher degree of integration and faster speeds. But now 32-bit ARM microcontrollers can increase DSP processing power, and it will be hard to say in the future whether DSPs or microcontrollers are used as motor processors.
The functional diversity of the dome cameras means that the product features will be more powerful, applicable to different environments, and more comprehensive and better compatible. Click to enlarge and automatic tracking function are the two major technological breakthroughs of the recent high-speed ball. Click to enlarge means that in the monitoring process, when the monitoring target is found, the object is clicked with the mouse, and the high speed ball transfers the image to the center of the screen and intelligently enlarges according to the size of the clicked object. The automatic tracking function is based on the image processing technology to extract the motion vector in the image, and the high-speed ball moves according to the moving direction of the moving object in the image.
The multi-language title is also a new technology that has recently been used in high-speed ball products. In fact, this technology has matured in the matrix, but it has only recently been applied to high-speed ball; lightning protection technology has always been the subject of high-speed ball research. In the past, lightning protection for control signals has only been adopted. Recently, high-speed cameras have made major breakthroughs in the lightning protection of video.
The network high-speed ball will be another direction of high-speed ball R&D. The use of convenient and fast network technology to transmit video and control signals will greatly expand the application of high-speed ball in the surveillance industry. The network function also brings some new products to the product. The application fields, such as current video surveillance, are increasingly used in power and transportation industries.
The intelligent main body is composed of high-speed ball and other devices to form intelligent identification (face identification alarm, abnormal identification alarm, license plate recognition, etc.), automatic tracking (moving object tracking), alarm linkage, automatic alarm recording, etc. "The application is more familiar, more intelligent and humane.
The integrated high-speed smart ball is equipped with a large optical zoom lens, with high horizontal resolution, built-in high-speed PTZ, can quickly and accurately achieve positioning monitoring; click zoom function can more quickly monitor the image of shooting key objects, suitable for Public places and road monitoring; In addition high-speed smart ball generally also has preset points, pattern scanning, automatic cruising and other functions, can better achieve the city monitoring and many other special requirements. The integrated high-speed ball is more hidden than the general PTZ camera, so it is very suitable for road traffic monitoring. In the current city surveillance application system, the integrated high-speed smart ball has been frequently displayed in various applications. In order to strengthen the construction of urban safety precautions, the department has set up monitoring and alarm points at traffic junctions, streets, communities, business districts, scenic spots, and other places with complex public security conditions within the urban areas, especially roads, community dynamic image monitoring systems, and scenic spots. The construction of the “Golden Shield Project”, such as the networked image monitoring system, has established a solid protective net for the general public and tourists, and has contributed to the promotion of the city’s image and the construction of a “Safe City”.
High Speed ​​Ball Application Notes
1, high-speed ball is not suitable for any occasion
Of course, high-speed domes are not suitable for any occasions. High-speed domes are affected by their own construction and are not suitable for some occasions.
At present, most of the high-speed domes on the market have CCD dimensions of 1/4”, which determines their photoelectric conversion efficiency is lower than 1/3” CCD gun cameras; in addition, due to the limited size of high-speed domes , And it also needs to accommodate larger zoom optical zoom lens, which determines the size of its optical zoom lens smaller. In addition to almost all fastballs, the optical lens consists of several lens groups, through the refraction and reflection of light between these lens groups, so as to achieve the corresponding optical zoom magnification. Obviously, when the light is refracted and reflected in the lens group, some of the energy will be lost. Therefore, the light that enters the CCD is also weak, which also affects the efficiency of the photoelectric conversion. Therefore, for applications where there is insufficient illumination, or when it is required that both day and night can be clearly imaged and there is no adequate lighting at night, smart high-speed domes do not apply. For example: In some environments where large focal lengths (above 200mm) and poor illuminance are required, if a camera with pan/tilt+high performance or large zoom lens is used, the effect will be better than high-speed smart domes. Therefore, the application of high-speed domes must also make appropriate judgments based on the actual monitoring environment.
2, selection avoids blind pursuit of high performance, full-angle, high-speed rotation
In the selection of high-speed ball, it is necessary to choose according to actual needs, and to avoid blindly pursuing its high performance, full-angle, high-speed rotation and other performance.
For example, when designing a scheme, a monitoring point needs to install a fast ball. According to the actual installation and use environment, when the fastball is used in a wall or column installation, it can be selected from a non-full-angle (full-angle 360 ​​degrees horizontal direction). Degree, 180 degree rotation in the vertical direction) Rotating fastball.
Imagine if the wall-mounted fastball has a horizontal rotation of more than 180 degrees or a vertical option of more than 90 degrees. What is the screen that appears in the rear monitor screen? It will be a wall or a floor. Say it is meaningless. This kind of installation method can choose the economical fast ball that rotates horizontally at 350 degrees and vertical at 90 degrees.
Proper selection of fastball can not only achieve the same monitoring effect, but also significantly reduce system costs. For example, in terms of the structure of the dome, the rotation angles of the two types of domes differ by only 10 degrees, but their costs may differ by more than 40% due to the different rotating motors. Therefore, in the selection of fastball, it is also necessary to consider the characteristics of monitoring distance and monitoring target, and different optical zooming devices can be selected according to different monitoring distances.
As society pays attention to urban security surveillance and traffic monitoring, given the advantages of high-speed cameras that other cameras do not have, there will be a large number of applications for such cameras in the future. Although the cost of high-speed ball is relatively high at present, with the development of technology and the decrease of the cost of upstream components and components, the cost of high-speed ball will certainly be reduced, and the product will be widely used.

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