The environment of the construction site is relatively complex. Unlike the general enterprises and institutions, the construction site covers a large area. With the progress of the project, the entrance position will change, which requires that the time and attendance system can facilitate demolition and installation. Workers on the construction site have large mobility and generally have low levels of education. Staff time is not fixed and the work cycle is not fixed. Workers who are overly complex in the attendance process do not understand and are not easily accepted. At the same time, information statistics are difficult, and the construction site work hours and the uncertainty of the construction cycle bring many difficulties to the post-attendance information statistics work.
Manual attendance is the most traditional way of attendance, but it is difficult to implement. The site has a large flow of people. Attendance managers can not make mistakes when registering personnel, and they are also prone to false attendance. The traditional attendance management system is flawed. Some existing construction sites are aware of these problems and adopt the attendance management system one after another. The new system is more standardized in attendance management than manual attendance and avoids mistakes in manual attendance. However, this kind of attendance system also has some deficiencies, such as the worker will forget the card or the card is lost, others will hold the card on behalf of the brush.
system design
Construction site personnel attendance management system consists of construction site personnel attendance system, attendance verification system, LED display screen system. The construction site personnel attendance system adopts innovative universal three-roll gate channel equipment, which is a high-performance electronic standard reading device. Three-roll gate: In order to prevent workers from entering the arena and attendance confusion, we use a three-roll gate similar to the subway. Equipment to ensure one in and one out. A three-roller gate includes two sets of two-way access card readers and one set of channel controllers. At the same time, the card holding equipment can be designed as a key button, or the card can be mounted in a safety helmet and can be worn with them. The attendance system features:
1) The key button-like label can be put together with an ordinary key to prevent workers from forgetting to bring the card or losing the card.
2) Automatic remote and long-distance card swiping without removing.
3) Sensing time is short and passes quickly. At the same time, it can meet the accurate identification of large-capacity users.
4) Connect with the PC terminal to automatically collect attendance information and simplify the work of related staff.
The attendance verification system is to collect the portrait information of the cardholder before the system runs. By setting up a networked camera on the channel, the person will automatically take photos when they pass through. The system will verify the portrait information and tag information. If it is found to be inconsistent with the cardholder recorded in the system, the system will automatically issue an alarm to remind the relevant staff to verify and avoid the generation. Brush attendance phenomenon.
The LED display system is connected to the PC terminal via a wireless LAN, and the information is transmitted to the display screen. The worker attendance information is displayed in real time. The employee can confirm the attendance information recording success through the LDE display.
System functions
The worker wears a key button IC and ID card to swipe the card in the sensing area without taking it out, and the three-roll gate channel reads the card information. The video surveillance collects the portrait information of the workers and checks the information with the card. The verification is successful and the workers pass through the channel. At the same time, the workers' information is transmitted to the central information processing system and the attendance records are completed. If the check fails, the channel sounds a prompt to indicate that the card does not match and the relevant person handles it. The central information processing system transmits the attendance record to the LED display in real time, and the worker checks the display to ensure the attendance is successful. No card personnel arbitrarily pass through the channel, the system will automatically issue an alarm alert to remind relevant staff to pay attention
System advantage
The intelligent three-roll gate access control system is an intelligent system developed and developed using non-contact intelligent technology. Compared with other systems, its advantages are:
Smart Card: The system uses a non-contact smart RF card, which successfully solves the problems of multiple cards, confidentiality, wear-free, and easy operation, greatly improving the practicality of the system.
(1) Easy expansion: The computer and intelligent three-roll gate adopt RS485 bus communication, so it is easy to expand capacity. That is, when the corresponding control system is installed, if it is necessary to increase the number of intelligent three-roll gates, the hardware only needs to add the corresponding intelligent three-roll gates, and the software can set new devices.
2) Off-line operation: The intelligent three-roll gate can not only operate with the computer network, but also work offline. The intelligent three-roller gate automatically judges whether the user card is valid according to the parameters downloaded by the system, determines whether to open the gate, and stores the opening record in the memory.
(3) The smart card reader can be used at will, and the user will automatically reset the search card after it is over (the anti-tracking and anti-hacking functions can be realized).
(4) The control board has an RS485 communication interface, which can be expanded to directly control the intelligent three-roller gate through software, facilitating the centralized management and control of large-scale channel systems. (need to order)
(5) It can be used to support the counting function. It can facilitate the management of people's flow through the external stripe screen display. (need to order)
System features
Convenient and quick: read and write cards, one stroke. With the authorized IC card, the smart three-roll gate writer can be released in advance, and the smart tri-roller gate opening and charging records can be completed. The reader has no direction, and the reading and writing time is 0.1 second, which is convenient and quick.
Security and confidentiality: Communication between IC card and IC card reader/writer, using triple authentication technology to confirm each other, digital technology, key algorithm, authorized distribution, that is, IC card can only be applied in this system, security and confidentiality.
Reliability: IC card RF induction, stable and reliable, with its own judgment, thinking ability.
Flexibility: The system can flexibly set the access control personnel's authority, time period control, cardholder's validity and blacklist report, add card and other functions.
Versatility: Through authorization, the user card can be used for "carding" management such as parking, attendance, access control, patrol, and consumption, and can be easily used for multiple purposes.
Simplicity: easy to install, simple wiring, software Chinese interface, easy to operate.
The IC/ID card used in the smart card management system is a contactless smart card. According to the different permissions and roles of the card in the system, the card can be divided into the following categories:
System authorization card
The system authorization card is provided by the system manufacturer and issued with the intelligent three-roll gate management system. It has the highest authority in the system for senior management personnel to enter the system for login and use. After using the system authorization card to enter the system, all functions such as system parameter setting and system initialization can be performed, and an operation card can be issued at the same time.
System operation card
The system operation card is a credential for the general manager to operate on the system and can execute the authorized functions and manage the daily work of the system.
Staff Card
The employee's card is used by ordinary people and is used by ordinary people to turn on the intelligent smart three-roll gate, attendance or dining in the cafeteria.
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