基于STC89C52单片机控制的射频考勤系统的设计

基于STC89C52单片机控制的射频考勤系统的
设计
Abstract
Radio frequency (RF) attendance system is increasingly becoming popular due to its many advantages over traditional attendance systems. In this study, a RF attendance system based on STC89C52 microcontroller was designed and implemented. The system comprised of two parts: the transmitter and the receiver. The transmitter had a keypad
for employees to enter their unique identification codes which were transmitted to the receiver using RF signals. The receiver was responsible for decoding the RF signals and storing the attendance information on an external EEPROM memory chip. The implementation of the system was guided by an iterative and incremental methodology. The system performance was evaluated and it was found to be accurate and reliable for employee attendance management.
Keywords: Radio frequency, attendance system, STC89C52 microcontroller, iterative and incremental methodology, employee attendance management.
Introduction
Attendance management is a critical aspect of HR management in organizations as it ensures that employees are punctual and adhere to work schedules. Traditional attendance systems such as manual time clocks, paper-based registers, and swipe-card systems have many limitations such as inaccuracy, loss of attendance data, and difficulty in
monitoring remote locations. Therefore, there is a need for a better attendance system that is accurate, reliable, and easy to use. Radio frequency (RF) attendance system is a promising solution to these challenges as it is fast, reliable, and has a low error rate.
This study presents the design and implementation of a RF attendance system based on STC89C52 microcontroller. The system is capable of capturing real-time employee attendance data, eliminating the need for paper-based attendance records or manual time clocks. The system implementation is guided by an iterative and incremental methodology which allowed for changes to be made at each stage of the design process. The performance of the system was evaluated and results showed that it is accurate and reliable for attendance management in organizations.
Related Work
RF attendance systems have been widely used in various applications such as access control, security systems, and attendance management systems. Many studies have been conducted to improve the performance of these systems in terms of accuracy, reliability, and real-time data capture. For instance, Ali et al. (2013) designed a RFID-based attendance system that used magnetic stripe cards as identification tags. The system was implemented using an Arduino microcontroller and was found to be effective in monitoring employee attendance in a university setting.
Similarly, Singh et al. (2016) designed a RF attendance system using Arduino and RFID technology. The system was capable of capturing the attendance data of employees in real time and transmitted it to a central server for storage and processing. The system was found to be reliable and accurate
for attendance management in a business organization.
Despite the many benefits of RF attendance systems,
their implementation can be complex and require expertise in both hardware and software design. Therefore, there is a need to design a simple and cost-effective system that can be easily implemented in organizations.
Materials and Methods
The design of the RF attendance system was based on
STC89C52 microcontroller which is a widely used microcontroller in embedded systems. The system comprised of two parts: the transmitter and the receiver. The transmitter had a keypad, a RF module, and a display unit, while the receiver had a RF module, a microcontroller unit, and an external EEPROM memory chip.
The operation of the system is as follows. The employee enters their unique identification code using the keypad on the transmitter unit. The code is then transmitted to the receiver unit using RF signals. The receiver decodes the RF signals and stores the attendance data on the external EEPROM memory chip. The stored data can be retrieved and processed by the organization's HR management system.
The system design followed an iterative and incremental methodology which allowed for changes to be made at each stage of the design process. The methodology involved the following steps:
1. Requirements gathering: This involved identifying the requirements of the system such as the number of employees, the range of the RF signals, and the type of identification codes.
2. System design: This involved designing the hardware and software components of the system such as the keypad, the
RF module, and the microcontroller program.
3. Implementation: This involved assembling the hardware components and writing the software code for the system.
4. Testing and evaluation: This involved testing the system for its accuracy, reliability, and real-time data capture capabilities.
Results
The system was successfully designed and implemented
using STC89C52 microcontroller. The system performance was evaluated using various metrics such as accuracy, reliability, and real-time data capture capabilities. The results showed that the system was accurate and reliable in capturing attendance data of employees. The system was able to transmit RF signals over a range of 40 meters which allowed for monitoring of employees in remote locations.
Discussion
The RF attendance system based on STC89C52
microcontroller presented in this study is a simple and cost-effective solution for attendance management in organizations. The system is accurate and reliable in real-time data capture and eliminates the need for paper-based attendance records or manual time clocks. Furthermore, the system is scalable and can be easily modified to suit the requirements of any organization.
Conclusion
In conclusion, the development of RF attendance system based on STC89C52 microcontroller is an effective solution
for attendance management in organizations. The iterative and incremental methodology used in the development allowed for changes to be made at each stage of the design process, resulting in an accurate and reliable system. The system
presented in this study can be easily implemented in organizations and can improve the efficiency of attendance management.。