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I. Overview
Modern logistics parks continue to move towards large-scale, modern, and intelligent directions, and the larger the scale, the larger the area that needs to be managed, and
Equipment such as forklifts also urgently need intelligent management. Among them, the need for standardized positioning management of forklifts “unrestricted in use and returned in a line” is on the agenda. Intelligent positioning management allows the administrator to remotely monitor the parking position and parking time of each forklift, and whether it has been unauthorized. Use and so on.
To this end, Guangzhou Zhongzhi Internet of Things Technology Co., Ltd. designed this Internet of Things management system to realize the “four-have” intelligent management such as forklift usage supervision, usage records, usage and deployment, and notifications for abnormal situations.
2. Introduction to application requirements
The logistics park has a large area. Forklifts are a necessary tool for cargo deployment. When they are not working, they are required to park at designated parking spaces. Each parking space has an independent ID and tag identification detector. If the forklift is not parked in the designated position, After being detected, the system prompts a warning.
Figure 1 Application layout
1. Forklift position recognition
Each forklift is equipped with a positioning tag, and each parking space is equipped with a position identifier. After the system is issued and bound, when the forklift is parked in the parking space, the system can know which forklift is parked in which position.
2. Forklift real-time control
After the system knows the situation and usage of the forklift in real time, it can make reasonable deployment based on the latest situation in real time, avoiding traditional blind search and uncontrollable problems.
3. Use permission recognition
The forklift is fixedly installed with the vehicle tag. Before the personnel use it, they need to link the vehicle tag through the handheld device and swipe the work card to authenticate the use authority. The background system can learn which person is using which forklift. If it is not approved for use, the system By sending out alarm information, managers can obtain abnormal use alarms for the first time, and deal with them in time to avoid confusion or even danger.
4. Usage Statistics
Through forklift location positioning and personnel use certification management, managers can easily realize in front of the computer: statistics on vehicles in use, statistics on vehicles in use, statistics on abnormal usage, statistics on usage time, statistics on personnel usage, etc., and use data to guide Efficient operational decision-making.
5. Exception alarm
When the forklift has not been approved for use, the person has not parked back to the parking space after leaving the vehicle, or has been used overtime, the background system can issue an alarm to remind the management staff to pay attention to it in time.
3. System introduction
Figure 2 System topology
The system adopts RFID wireless positioning and communication management technology to realize, through the handheld and the base station installed in the parking area, downward through the dedicated wireless coordinate positioning tag and vehicle tag information, upward through the Internet and server database and back-end system for data operation interaction , Constitute a stable and efficient operation management system.
1. Locate the label
Figure 3 Schematic diagram of positioning label
The positioning tag is small in size, fixed at the rear of the forklift, and bound to the forklift information. According to the actual situation, each forklift can be equipped with one or more tags. When the forklift is parked within the designated parking area, the tag will recognize the positioning identifier. And report its own information and corresponding positioning identifier information to the base station to obtain parking location information.
2. Positioning recognizer
Figure 4 Schematic diagram of positioning recognizer
The recognition antenna of the location recognizer is buried. It is powered by 220V and can circle the outer edge of the parking space to form a location recognition frame. When the forklift enters this recognition frame, the location tag can recognize the location recognizer and form a location location.
3. Vehicle label
Figure 5 Schematic diagram of vehicle label
Install one on each forklift driving position. Before using the forklift, the driver uses the handheld to open the software and link it to the vehicle tag of the vehicle, and use the handheld to identify the employee card and bind the use authorization authentication. After binding, the system You can record the current vehicle ID used by this employee, so that the use can be tracked, and after the driver has finished using it, he can unbind it when he finishes using the handheld.
4. Base Station
Figure 6 Schematic diagram of base station
The base station has the characteristics of waterproof, dustproof and aging resistance, and the outdoor coverage can reach a radius of more than 60 meters. It can be adapted to the indoor and outdoor environment. The base station is suspended at an appropriate position in the forklift parking area. The base station can communicate in 3G mode, and only needs to provide 220V power supply to work.
5. Handheld
Figure 7 Schematic diagram of the handheld
Personnel using forklifts are equipped with handhelds. Before starting to use the forklifts, connect the handheld software to the forklift’s vehicle label and swipe the employee card to perform use audits. Through the use of audits, work hours can be standardized and recorded, which is helpful for salary. calculate. The handheld device has 3G function and code scanning function, and the driver can check orders and goods through the handheld device.
Fourth, the software system
The system adopts the B/S architecture, cooperates with the system data server, and can be operated in parallel through multiple terminals on the web page, and the system can customize specific function modules according to requirements.
1. Account Management
Figure 8 Schematic diagram of account management
Users can manage the permissions and related information of all system operators through the account management interface. The system has two levels of permissions, super administrators and ordinary administrators.
2. Forklift information management
Figure 9 Schematic diagram of forklift information management
This interface is for the administrator to enter the forklift information, and to enter and bind the matched active tag information. After binding, the location and other information generated by the corresponding tag can be displayed synchronously with the forklift information.
3. Personnel Information Management
Figure 10 Schematic diagram of personnel information management
This interface is for the administrator to enter the personnel information, and the entry and binding of the matched personnel tag information. After binding, the corresponding personnel can be triggered by the on-board authority monitor when operating the forklift, and the system controls the operation authority of the personnel Determine whether to operate in violation of regulations and make an alarm.
4. Equipment Information Management
Figure 11 Schematic diagram of device information management
This interface is for the administrator to input device information such as location detectors, permission monitors, wireless base stations, etc., which is convenient for the administrator to identify and quickly judge many devices on the site.
5. Alarm information management
Figure 12 Schematic diagram of alarm information management
This interface displays all the alarm events recorded by the system, and the administrator can perform a list overview and detailed view.
Five, system advantages
1. Long reading distance
The reading and writing distance of active tags is far greater than that of passive tags, which provides an effective guarantee for the management and control of large logistics parks.
2. No dead angle recognition
Since the wireless signal of the positioning tag is sent out in the form of spherical waves, when installed in a hidden position of the forklift, the metal interference can be greatly reduced, and the reliability of identification can be guaranteed.
3. High positioning accuracy
The system adopts a delineated positioning method, which can perform precise range positioning according to site requirements.
4. Low radiation impact
Passive tags require the host to provide energy when working, so the host’s wireless signal transmission power is relatively high. When the wireless signal power reaches a certain value, it will be harmful to the human body. Relative to passive tags, active tags can provide energy by themselves, so that the transmission power of the host and tag can be made relatively small, which is equivalent to about 1/100 of the radiation of the mobile phone, and there is basically no harm to the human body.
5. Strong scalability
After the base station signal is set up, more functional node equipment can be added later, such as valuables anti-theft monitoring, automatic entry and exit records, utilization rate detection statistics, etc., so that the management and control of the logistics park can be based on, rationalized and optimized management to improve operations efficient.
6. Long working hours
The locating tag uses a low-data, low-power wireless technology, and the sleep power consumption is uA level, so that the active tag can work for a long time, and the working time can be as long as 2 years.
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