Intelligent channel gate management system design scheme
OEM needs smaller and more diverse packaging options to meet product design challenges and maintain cost competitiveness in their respective markets. Ball grid array (BGA) packaging is becoming more and more popular to meet these design requirements. In addition, they are ideal solutions, because I/O connections are located inside the device, increasing the ratio of pins to PCB area. In addition, BGA with strong solder balls is stronger than QFP lead, so it is more robust.
With today's electronics technology, the demand for I/O availability poses a number of challenges, even for experienced PCB designers, due to multiple exit routes.
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Smart channels can establish a standardized management image of offices, buildings, or offices, and improve management levels while standardizing internal management systems. Mainly through the access control system to control the corresponding channel hardware such as: three roller gate, swing gate, wing gate control channel permissions, people flow can also achieve access control, attendance, current limiting and other functions. It is used in places where personnel exits and entrances need to be controlled, such as canteens, hotels, museums, gymnasiums, clubs, subways, stations, and docks. Can achieve access control, time and attendance, current limiting and other functions, as well as charging functions.
A proximity card can replace all the main door keys and have different permission to pass. All entry and exit conditions are recorded on the computer, making it easy to inquire about the occurrence of specific events and to implement responsibilities. You can reject unpopular people. For example, you can prevent salesmen in industries such as MLM and insurance from unauthorized access to your factory and office areas and interfere with your normal office order. Competing competitors will not easily enter your site and inspect your core technology projects.
If an employee's proximity card is lost, it can be immediately reported to the system. This prevents others from accessing the company even if they find the proximity card. For employees resigning or dismissing or leaving, the card is disabled. This employee will not be able to access your office area in the future.
You can monitor the access status of card readers in real time, and you can compare and display photos to understand the normal dynamics of the workspace.
1.2 The structure of the intelligent channel The composition of the intelligent channel card reader: Through the principle of radio frequency induction, identify the built-in encryption card number of the proximity card.
Proximity Card: Stores the user's non-copyable and decipherable ID number.
Controller: Stores proximity cards and credit card records, and centrally processes all readers to upload signals, is responsible for coordination with computer communications and other data storage, and cooperates with the intelligent processing center of management software.
Three-roll gate, swing gate, wing gate: electric actuator.
485/232 signal converter: Network and long-distance communication for all data memories.
Management software: Central management and monitoring of all units through the computer, and corresponding clock, authorization, and statistics management.
Power Supply: The power supply that provides the operating power for the system and the actuator for the gate.
System principle description: The card reader reads the card information and feeds it back to the controller for information processing. The controller judges the card authority according to the card information. If it is legal, it sends an instruction to the gate motor to drive the gate motor.
2. Channel control system and function introduction 2.1 Intelligent channel management software introduction Design ideas: Intelligent channel management software is developed for the needs of the Chinese market, and designed according to China's national conditions, working hours and living habits, using Chinese window design , It is very easy to operate, can be familiar with the application of software in a short time, the software can be a variety of programming; such as time zone programming, level programming, access card programming, etc., can also be a variety of report printing, to facilitate management inspection.
Four major features of control management software:
Simple operation (biggest features): When researching and developing the software, we pay attention to the convenient requirements when using it. The Chinese-language user interface, complete documentation, and concise user interface are all sufficient for basic management of computer operations. It also makes your operator convenient and quick when handling handovers. At the same time, it also made the training work quick, easy, and effective.
Use security: password-protected access procedures to prevent unauthorized personnel from operating and altering data. Guarantee the security and reliability of your data. Can be multi-user management, operators with different privilege levels have different operating rights and levels, and people in different departments have different software functions.
Strong compatibility, easy to upgrade. It can be compatible with Microsoft's operating systems such as windows2000, XP, and Vista. It is recommended that you install and operate this system on XP. Software upgrades can be easily performed to obtain updated software versions. The functions are more powerful, the operation is more convenient, and the interface is more friendly.
Powerful: R&D's software takes a professional look into consideration of your needs for all aspects of access control and management, and integrates with China's national conditions to match smart attendance management systems and dining management systems. And can enjoy the software's timely upgrade and expansion services, making your system have more powerful features.
2.2 Introduction to basic functions The software already includes 95% of access control functions on the market, and organizes them in a reasonable way, making operation easier and easier for operators to manage and learn. Of course, Randoli will also continue to pay attention to and pay attention to new customer needs, and develop new software versions when appropriate, and can maintain a simple and convenient design style, allowing users to enjoy better software features. The joy of coming.
Flexible rights management can set which channels a person can go to, or someone can go through all the channels. You can also set which channels someone can go through. Users can clearly see who can pass a channel, or which channels a person can pass through. At a glance, it can be printed or exported to an Excel report.
Time period rights management function: You can set a person to a certain track, day of the week can enter, every day for several time periods can enter. After the offline operation is uploaded via software settings, the controller will remember all the permissions and record all the information. Even if the computer software and the computer are turned off, the system can still be normally offline and run normally, even if the power failure information is never lost.
Real-time monitoring photo display: The channel status display function can real-time monitor the status of all channels for swiping and access, and can display real-time photos of the credit card holder stored in the computer so that the security guards can check with themselves. The real-time record of the legal card is displayed in the green manner, the record of the illegal card is recorded in the orange manner, and the alarm record is displayed in the red manner, which is convenient for prompting the security personnel to pay attention. If a video access control device is added, real-time photographing and recording can also be performed while the customer is swiping the card.
Real-time extraction function: The user can monitor the data in real time while automatically extracting the records in the controller and uploading a piece to the computer database.
Forced Close and Forced Open: If some channels need to be turned on for a long time, they can be set as normally open by software. Some doors need to be closed for a long time and you don't want anyone to enter it. You can set it to be normally closed.
Remote door opening function: After receiving instructions, the administrator can open a channel remotely by clicking the "Remote Door Open" button on the software interface. Remote opening records can also be recorded by setting.
2.3 Extended functions of access control channel management Quick query of the number of people in the door, quick location query, card + password function, super password function, fire alarm and emergency door opening function, linkage output function, illegal intrusion alarm, or forced opening alarm, door The alarm is not closed for a long time, the illegal card swiping alarm, the time-up upload permission function, the operator's sub-department management function, and the first card opening.
Ball Grid Array (BGA), a type of surface-mount packaging (a chip carrier) used for integrated circuits.
Ball-Grid Array (BGA) Packages Become PCB Design Mainstream
BGA PCB Design Guidelines And Rules
BGA PCB Design Rules
In order to keep up with the technological progress of chip manufacturers, BGA software packages for embedded design have made remarkable progress in the past few years.
This special type of packaging can be decomposed into standard BGA and micro BGA.
Correct BGA partitioning first takes into account uniformity of the partitioning, itself. Because, precise BGA partitioning on a PCB is a crucial design aspect to minimize or eliminate crosstalk and noise, as well as manufacturing issues.
Memory signals need special consideration during BGA partitioning. They need to be away from oscillating signals and power supply switching. This is important because memory signals needs to be clean. If traces carrying these signals are in the proximity of oscillating signals or switching power supply signals, they produce ripples in the memory signal traces, thereby reducing system speed. The system is operational, but at less than optimal speed levels.
BGA PCB Design Guidelines
BGA Design Strategy 1: Define an appropriate exit path
The main challenge for PCB designers is to develop appropriate exit routes without causing manufacturing failures or other problems. Several PCBs need to ensure proper fan-out wiring strategies, including pad and pass size, I/O pin number, layers required for fan-out BGA and line width spacing.
BGA Design Strategy 2: Identify the Layers Required
Another question is how many layers the PCB layout should have, which is by no means a simple decision. More layers mean higher overall cost of the product. On the other hand, sometimes you need more layers to suppress the amount of noise PCB may encounter.
Once the alignment and space width of PCB design, the size of through holes and the alignment in a single channel are determined, they can determine the number of layers they need. Best practice is to minimize the use of I/O pins to reduce the number of layers. Usually, the first two outer sides of the device do not need through holes, while the inner part needs to arrange through holes below them.
Many designers call it dog bones. It is a short path of the BGA device pad, with a through-hole at the other end. The dog bone fan comes out and divides the equipment into four parts. This allows the remaining internal padding to be accessed by another layer and provides escape paths away from the edge of the device. This process will continue until all mats are fully developed.
BGA Package Types
There are six different BGA packages.
1. Moulded Array Process Ball Grid Array (MAPBGA): It is a BGA package which provides low inductance and simple surface mounting.
2. Plastic Ball Grid Array (PBGA): Again, this BGA package provides low inductance, simple surface mounting, high reliability and is cheap.
3. Thermally Enhanced Plastic Ball Grid Array (TEPBGA): Just like its name sound, this BGA package can handle great levels of heat dissipation. Its substrate has solid copper planes.
4. Tape Ball Grid Array (TBGA): You can use this BGA package as a solution for medium- to high- end applications.
5. Package on Package (PoP): It will permit you to put a memory device on some base device.
6. Micro BGA: This BGA package is quite small when compared with standard BGA packages. Currently, you will see 0.65, 0.75 and 0.8 mm pitch size dominating in the industry.
BGA PCB Assembly
Previously, Engineers were not sure whether PCB BGA assembly would be able to achieve the reliability level of traditional SMT methods. However, at present, this is no longer a problem, because BGA has been widely used in prototype PCB assembly and mass production PCB assembly.
You will need to use reflow methods to solder a BGA package. Because only reflux method can ensure solder melting under BGA module.
We have a wealth of experience handling all types of BGAs, including DSBGA and other Complex Components, from micro BGAs (2mmX3mm) to large size BGAs (45 mm); from ceramic BGAs to plastic BGAs. We are capable of placing minimum 0.4 mm pitch BGAs on your PCB.
PCB BGA Advantages
With PCB BGA, you will get the following advantages:
1. BGA package eliminates the issue of developing small packages for ICs with lots of pins.
2. Again, when compared with packages with legs, The BGA package has a lower thermal resistance when placed on the PCB.
3. Do you know which property causes unwanted signals distortion in high-speed electronic circuits? The unwanted inductance in an electrical conductor is responsible for this phenomenon. However, BGAs have very little distance between PCB and the package which in turn leads to lower lead inductance. Thus, you will get top-class electrical performance with pinned devices.
4. With BGAs, you can effectively utilize your printed circuit board space.
5. Another advantage that will come with BGA is the reduced thickness of the package.
6. Last but not least, you will get enhanced re-workability because of bigger pad sizes.
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