I. Summary of high-speed ball
Speed Dome Camera is an intelligent front-end, full-called high-speed intelligent dome camera, or high-speed ball smart ball, fast ball short, high-speed ball. Speed ball is the most complex and comprehensive monitoring system performance in front of the camera best, manufacturing complex, expensive, able to adapt to high density, the most complex control situations.
Second, the structure and principle of high-speed ball
Speed ball is a very high degree of product integration, integrated PTZ systems, communications systems, and camera systems, head systems is the motor-driven rotating parts, communication systems is the control of the motor as well as image and signal processing part, the camera system is used in one machine movement. And several major systems, horizontal connections play a piece of core cpu and power supply part of the master. Some power supply with the major systems, many places have adopted the diodes, transistors and other micro-current power supply, while the core cpu is the realization of all functions work correctly.
The principle of high-speed ball is in fact generally above-mentioned, and specifically, high-speed ball with "precision differential stepper motor," enables high-speed ball fast, accurate positioning, rotation. All of this instruction issued by cpu achieved. Then the camera image, the camera features included in the high-speed ball cpu, when the realization of the control head, the image transfer out, and many functions can cameras, such as white balance, shutter speed, aperture, zoom, on the Coke and other functions to achieve control.
Generally high ball into hot core part of some shell parts and accessories. Any manufacturer's high-speed ball, has a package with the rack to one machine movement, the control board and motor head decoding system, the hot core part of the unified, then hot core part with the shell or other connected with the screw up hot core is a core part of the shell and a variety of general appearance, the appearance of such Pelco, Panasonic appearance, and appearance of their own design. Generally adopts the aluminum alloy shell, but also plastic, aluminum alloy casting and stamping generally divided into two shells. Better than the plastic alloy, stamping casting than good. Cover part of the next shell is transparent, transparent cover to cover optical transparency to ensure that light for no deformation rates and image, but also consider the anti-aging and damage, dust and other issues. Accessories, including some of the general support section, heater parts, fan hot part. Support includes wall bracket, hanger bracket, surface mount ceiling, ceiling do not support embedded, general outdoor balls are equipped with thermal fan device, and heating in cold regions have only optional, in principle, indoor ball no fan heat and heating parts. Accessories include power supply, 24 volt are generally used for 2 to 3 On current transformer.
High-speed ball a few major hardware components, first motor, and then slip ring, then the power part and control the board. Drive belt is also important.
High-speed communication problem there is the ball involves the communication protocol and communication problems, communication protocol is the high-speed ball with communication with the host system when the selected communication protocol, such as pelco, Mann code, Panasonic, Philips agreements. Communication is the communication protocol used to communicate any way, such as 485 communications, 232 communication, 422 communications, coaxial, as the control means of communication, in general, high-speed ball with 485 communication, the communication protocol in all different from different manufacturers.
Third, features high-speed ball

There are several basic high-speed ball function, the first is to run fast, and the second is to run smooth, the third is the positioning accuracy.

1, high-speed function: preset bit rate requirements emphasize fast, reaches 250 degrees / sec or more; emphasized stable secondary speed control, control of sensitive and flexible, not too fast, can not be rigid to support the speed.
2, preset position function: to be with more than 64 preset position, and to ask preset position must be accurate, power failure can remember the preset position.
3, cruise scan: can set the speed the ball must be able to cruise between the various preset bit scanning.
There are some advanced features of high-speed ball:
1, track memory function: requires high speed memory of the ball to the track more than any line, can also be invoked by setting the track line.
2, the menu display: to display the menu of a good operation, run through the menus on the speed, preset bit retention time, operation mode changes to the camera through the menu to modify the parameters, as well as programming, automatically tracking, privacy masking and so on.
3, comes with alarm input and output: an increase in high-speed ball alarm input and output modules.
4, network speed dome, high-speed fiber optic ball: the ball in again in the high-speed integrated network video server module or Optical Module.
4, high-speed ball and the ball head, medium-speed ball, the difference between uniform ball
1, the two types of fastballs, a stepper motor is a precision differential in speed ball, one is with a reduction ratio of the stepper motor in the speed ball, the first is equivalent to a simplified high-speed ball, while the second simply great differences in principle, the second motor differential reduction ratio motor through the motor itself to achieve, and high-speed ball is in the process by controlling the chip implementation. Therefore, medium-speed ball will be the second preset position in terms of accuracy and speed is far inferior to high-speed ball. The first high-speed ball, is generally used to control a SCM for high-speed ball, simplifies the development platform for the lower, using the components is relatively low, such as power handling, the core chip of choice, and so are more communication part savings program, in stability, function, interference, life and so inferior to high-speed ball.
2, uniform ball: the ball is generally divided into two kinds of uniform, one is the ball head built-in decoder board, and the decoders may function with a preset position can not rotate 360 degrees. This uniform spherical ball is actually head of the external decoder built into a decoder board. Another uniform ball is used in an appeal with the ball speed reduction ratio of stepper motors as part of the uniform head the ball, generally coupled with a conductive slip ring allows 360 degree continuous rotation of the ball because the motor itself, this uniform of torque and parameter restrictions, not to mention high-speed, preset position allowed, but the technique is simple and does not require much software support.
3, ball head: spherical head complete with high-speed motor used in a different ball, with the DC motor, no program, through the current control of the motor control, that "power transfer" principle . Create a simple DC motor, using a wide range of low cost, but life is short, torque is small (leading to slow), not easy to control (leading to unstable, can not pinpoint). Spherical head generally need to configure the decoder, while the decoder uses a set of general principles of the current pulse control relay, and then realize the head of the DC motor control, this relay is relatively simple, low cost, wide usage , but the control is far less than current chips command control, is a very backward and simple technology.
4, these are different from the principle of speaking, in particular, the spherical head and the stepper motor with reduction ratio of the speed ball, install one machine would generally not related to the camera with the ball machine communication problem uses a high-speed ball camera movement, one must stick She Xiangji the ports deal and the function is written to the high-speed ball inside, so in the choice of high-speed ball, the general configuration of one machine can not allow customers to their installation.
5, in the sales problems often encountered by customers
1, ask the customer projects, according to the situation to his choice of reasonable engineering high-speed ball: Use inquiry project, the general large-scale projects, airports, customs, traffic police, museums, etc. are used in high-grade, high-speed ball, while the built-in One machine is used is the best one machine. Then the general factories, schools, hospitals, buildings, etc. are used in the following mid-range or mid-range high-speed ball, while the supermarket or residential uses are low-cost, high-speed parity or low ball ball.
2, asking for the installation location, choose a different installation location is not the same as the built-in camera movement, installation methods. General indoor high-speed ball pure color of one machine, smaller zoom range, the initial focal length of the smaller, especially with wide-angle lens of one machine, such as 16-fold LG, 18 times the sony, and 22 times the Hitachi, and 22 times World forests and so on. Indoor ball is generally based on site conditions, use of indoor wall hanging, boom suspension, interior ceiling surface, embedded ceiling, etc.. Outdoor high speed dome generally use the color illumination, or color to black in one machine, and generally better quality to be used one machine, such as by LG22 times, 27 times, 22 times the World Forest, sony18 times, sony26 times, Hitachi 23 times other color to black one machine movement. According to the customer's situation, choose the price movement of different body aircraft.
3, when customers buy, pay attention to consider the host of ancillary problems, ask the host control protocol should be prepared if you do not match the protocol converter.
4, high-speed ball the most vulnerable to damage problems: improper wiring of customers, water did not handle the lead to water, lightning burn, ball machine itself.
Five, high-speed ball of Use: junction where the flow of people are concentrated, to track moving target where the target area need to zoom to enlarge the place, where necessary linkage alarm recording