The engineering design plan of the intelligent induction card “Home-School Communication” management system
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Introduction to “Home-School Link” Management System
(1) General description
Students must use their IC card to inductively swipe their attendance machine when going to school and after school. The time data of the swiping card is automatically transmitted to the GPRS data receiver; after the GPRS data receiver receives the attendance data, it is transmitted to the server data management center through the GPRS network, and the management center server passes The information mass-sending equipment of China Mobile Network transmits this swiping time to the mobile phone of each student’s parent. Parents use this method to understand when children enter and leave school. However, this system is highly extensible and can be integrated with the school’s educational administration management, including course management, student ideological trend management, student test score management, and student fee management. This not only strengthens the school’s paperless office management, but more importantly, strengthens the communication with parents, so that parents can learn about their children in school as quickly as possible.
The biggest feature of this system is the application of GPRS wireless data receiving and sending technology, which not only improves the speed and stability of data transmission, but also reduces the cost of school software and hardware investment and the maintenance cost of operators. (The school does not need to establish a local area network, and does not need to send and receive attendance data by special personnel). At the same time, the data communication mode of our company’s attendance equipment also has 232/485 communication and TCP-IP communication mode.
(2) The basic functions of the “Home-School Link” management system:
1. Query user information
2. Query the student’s time to leave school
3. Message to teachers and school leaders on behalf of parents
4. Inquire about teachers and school’s messages
5. Check test results
6. Help teachers post various messages
7. Various user complaints and suggestions
(3) The characteristics of Jiesda’s “Home-School Link” management system:
1. The security of reading and writing equipment
1) The data of all reading and writing devices (attendance machines, toll machines, access control machines) are stored in the FLASH chip, which is protected against power failure and will never be lost.
2) Read and write various parameters of the equipment, only through the “system management card” or password can you have the right to change and operate.
3) If the management computer fails and causes data loss, reset the FLASH chip pointer from the read-write device and collect the data again (when the FLASH chip storage is not full before it is emptied).
4) Every swiping record has a card read and write operation serial number to ensure the safety of each swiping record.
2. The security of network communication
1) During the data collection process, three communication methods such as RS-485, TCP-IP, GPRS, etc. can be used, two steps one collection, one question and one answer, to ensure that the data is not repeated or leaked. It is particularly pointed out here that when using GPRS to collect data, the communication mode between the GPRS data receiving device and the attendance machine is 485, and the data will be collected automatically from time to time in a round robin.
2) All read-write terminal communication sockets use DB-nine-pin serial plugs, which are stable, safe, and have strong anti-interference ability, and will not easily fall off, plug and unplug.
3. The superiority of interface software
Our company’s interface program is relatively flexible, and can provide various formats of card-swiping record data structure according to the requirements of various distributors, and can automatically transfer the data to the designated database.
4. Differences from similar products on the market
1) According to memory, other companies generally use electromagnetic chips (the price is cheap, data will be lost when power is off), but our company uses FLASH chips (the price is expensive, but the data will never be lost when power is off, even if the chip data is removed Will not be lost);
2) According to the collection method, other companies generally collect data packets as a whole, which is easy to lose and duplicate data; especially when using GPRS communication mode, similar products on the market use simple attendance machines (we call it a card reader) When receiving data, the data is stored directly on the GPRS receiving device instead of on the attendance machine. In this way, the card reader cannot judge whether the card is successful (some people think that as long as the green indicator light on the card reader flashes, the card is successfully swiped. In fact, the data Whether it is saved or not, the card reader cannot know), especially when the GPRS receiver fails, all data will be lost; and our company’s data collection is based on a half-duplex communication method, two steps and one collection, one question and one answer, to ensure that the data is not heavy No leakage, that is, the credit card data is first stored in the attendance machine, and the GPRS receiver issues instructions in a round-robin manner and the data is automatically uploaded. When the GPRS receiver receives the data in a certain attendance machine, it will immediately send back instructions to the attendance machine to delete the data. Data transmission; when the GPRS receiver fails, the data is stored in the attendance machine. When the data in the attendance machine is full, the attendance machine will give out sound and text prompts and no longer accept card swiping.
3) Data recovery function, it is generally difficult for other companies to recover data when they encounter data loss, but our company can take various forms of data recovery according to different situations. Such as by resetting the FLASH read and write pointers to retake data.
(4) “Home-School Link” system network diagram
(5) Product appearance and technical parameters:
A. Attendance machine (J-2000KQ)
Function description:
Our company’s attendance machine and access control machine (controller) have the same functions, and their functions are powerful. The difference between the access controller and the access controller is that it can have two card readers at the bottom to record the entry and exit time of the card.
Please contact for detailed plan
Shenzhen Jiesda Technology Development Co., Ltd.
Wu Jianhua (13502806572)
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