Construction of project supervision and management system based on RFID technology
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In the construction field, the hidden dangers of safety accidents can be fundamentally solved through effective monitoring. The Internet of Things is a network formed by linking people, things, and computers. It can effectively monitor the attributes of all objects within the network and input them into a computer to form a system information network. Therefore, the Internet of Things based on RFID (Radio Frequency Identification Technology) can be well used in construction safety management to monitor every worker, equipment, and environment on site; secondly, the technology is simple to operate, cheap, and conducive to popularization. Therefore, the Internet of Things It is of great significance to be applied to the field of construction safety. Generally speaking, a construction site can be regarded as a site composed of resources such as people, machinery and equipment, materials, and semi-finished products, within a certain organized space, where a dynamic operation process is carried out. Due to the existence of a certain disorder and complex dynamic environment on site, these resources cannot be properly managed and safety accidents are prone to occur. This requires us to rationally arrange and coordinate various resources on site and monitor various sources of danger to reduce the occurrence of such accidents. With the continuous development of communication and information technology, different monitoring technologies have emerged. Especially as the concept of the Internet of Things is put forward, it is well applied in the process of construction safety production to realize the real-time interaction of information and communication equipment and construction site resources, realize orderly construction, and improve the reliable guarantee of construction site safety.
The construction industry is one of the high-risk industries, and the occurrence of safety accidents at the construction site will have a negative impact on the social economy, people’s lives, and the surrounding natural environment. At present, many scholars and experts are actively studying how to minimize security risks, but there is no effective method to eliminate security risks in nature. The Internet of Things based on RFID (Radio Frequency Identification Technology), which is emerging at home and abroad, can predict the occurrence of accidents before the occurrence of safety accidents on the construction site, and provide early warning to workers and managers, which will be the key way to fundamentally solve the frequent occurrence of accidents. one.
1. Features of safety management system
(1) Excellent performance
The equipment has a high degree of recognition reliability, 100% front-end recognition rate, as long as the construction personnel wear a 2.4G active radio frequency card correctly, it can be read by a card reader installed nearby. Its stable recognition distance can reach up to 50 meters, and the information sent by the tag card within this range will be read. Each detection point can simultaneously identify up to 50 construction personnel’s information, and has a high degree of identification stability (error rate is less than one hundred thousandths), truly achieve no errors, no missing cards. Has a fast recognition speed, the fastest can reach a recognition speed of 200 km/h, to achieve true dynamic monitoring. When an emergency occurs, the construction personnel can call the monitoring center through the tag button; the monitoring center can also send information to the tag.
(2) Widely used
According to the network conditions of the construction site, it can provide multiple transmission methods inside and outside the tunnel based on optical fiber, Ethernet, communication cable, etc., which has strong adaptability and low requirements for the on-site environment, avoiding implementation difficulties and bottlenecks caused by a single transmission method.
(3) High safety and stability
The equipment itself has extremely high safety and stability. First of all, it has safe explosion-proof, dust-proof and waterproof performance. Secondly, it has high anti-interference, no special requirements for the tunnel interference source and surrounding environment, and strong environmental adaptability. The internal circuit is highly integrated, the device failure rate is minimized, and the operation is reliable.
(4) Simple and convenient operation
The software supported by the system uses full Chinese menus and has a good operation interface. Equipped with an integrated structural design of wireless monitoring sub-stations, it is convenient and quick to install. The identification card has a built-in battery, ultra-low power consumption, no external power supply, no need to charge.
(5) Rich auxiliary functions
The system has user-friendly auxiliary functions, such as query and report output, and printing functions are simple and easy to operate; it can query the attendance information of construction personnel, departments and cadres; it can query the motion trajectory of construction personnel; it can output various items as required A variety of information reports (such as: entering the construction site time report, personal attendance daily report, construction worker attendance monthly report, department attendance monthly report, etc.); you can remotely view the real-time situation of the tunnel on any computer with Internet access, without having to go to the site ; Can know at any time how many people are currently in the cave, and their identities can be displayed on the LED display at the same time.
2. Safety management system functions
(1) Attendance management function
Attendance is one of the main functions of the safety management positioning system. Through the card reader, it can be judged that the construction personnel are the entry and exit records at any time. Can add, modify, and query the information of construction personnel, cadres and departments, and query the attendance of personnel according to departments and various designated conditions, such as: number, name, shift, type of work, department, etc. query conditions; you can press any Conditions are automatically sorted; query and display the attendance of all managers on the day, and finally output reports according to user requirements.
(2) Positioning management function
This function is to lay the foundation for the prevention of accidents. It can query at any time and display the identity, quantity and distribution of personnel and equipment in a certain area; query the current actual location and activities of one or more personnel and equipment Track; record a series of information such as the arrival/departure time and total working time of relevant personnel and equipment at any place, and can supervise and implement safety personnel to check whether they are on-site on time and at the point, or perform various data detection and processing , Fundamentally, try to eliminate related accidents caused by human factors.
(3) Set the alarm function
1. Alarm function for outsiders. For outsiders or construction workers without a card, the system will automatically alarm when they enter the tunnel alone. However, when entering with the card holder, the system will not alarm.
2. Regional alarm function. Set the alarm function in the specific area, and set the authority for the label card. For example, when special operations are carried out on the construction site, the work surface is set as a guard area. If unauthorized personnel and equipment enter the guard area, the system will automatically alarm and display the identity of the personnel and equipment entering the guard area, and take appropriate actions in time Measures, after the blasting is over, cancel the alarm setting.
(4) First aid information after the disaster
Once a safety accident occurs, the control host can immediately display information such as the number of personnel, personnel information, and personnel location at the accident site, which greatly improves the rescue efficiency and rescue effect.
(5) Information networking function
By establishing a WE B server, information sharing can be realized by browsing the web, and the client does not need to add any additional software. In short, the above-mentioned functions still have certain limitations in the application of safety essential management. Since the introduction of the system is in the preliminary stage, it is still necessary to continuously expand the functions on the existing basis, and realize the perfection of the system through software upgrades. In addition, the application of the Internet of Things in the field of construction is not limited to construction safety management. It can be foreseen that in the near future, the entire process of construction projects, including construction progress, procurement, quality, and cost, will have a wide range of industrial development space.
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