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Automobile intelligent weighing management system has become an important part of the information management of coal mines, garbage dumps, petroleum industry, and non-ferrous metal mines. It is not imitable, anti-interference, anti-beating, rapid identification, and intelligent discrimination. Undoubtedly, it will provide a brand-new solution for these industries and form a new type of weighing management model that is efficient, accurate, fast and anti-cheating. Shenzhen Osda Electronics Co., Ltd. has introduced intelligent vehicle intelligent weighing integrating computer technology, short-range microwave communication technology, image digital processing technology, and automatic control technology to achieve automatic vehicle identification and information management, and improve vehicle traffic efficiency and Safety, and statistical vehicle access data, convenient for management personnel to dispatch, to reduce the labor intensity of management personnel, effectively prevent toll loopholes.
The so-called intelligent automobile weighing management system is to add the automatic identification function of weighing vehicles realized by long-distance RFID technology to the original automobile weighing management system, and merge the automatically collected weighing vehicle information into the weighing management system middle. The application of the smart car intelligent weighing management system of Aosta Electronics can increase the passing speed of the metering department by 3-4 times. Through the automatic identification of the car number and accurate metering, it effectively prevents the economy brought by human fraud to the enterprise. loss. In addition, after the implementation of the system, the labor intensity of the staff and the error rate of manual weighing have been greatly reduced, the transparency of the management process has been improved, and the informatization process of the enterprise has been promoted.
1. Application requirements
The automatic metering system is aimed at the fully automated (without human intervention) collection of automatic metering, weighing and skinning (empty car) data using cars as a means of transportation to ensure the accuracy of the original data collection. Through the realization of automatic measurement, the operating time of each operation link can be greatly shortened, the connection and unloading ability of the measurement system can be improved, and the working environment of the measurement personnel and the car driver can also be improved, and the labor intensity can be reduced.
2. Project implementation goals
The implementation of the project is divided into two phases, the first phase is the transformation of the existing system, and the second phase is the realization of unattended operations. The automatic measurement system of the loading area mainly includes the following six parts:
(1) Transport vehicle queue management. Vehicle queue management mainly completes the queue of transport vehicles, prevents vehicles from jumping in line, and improves the order of vehicle transportation.
(2) Sampling. Sampling The sampling of incoming coal is completed (the sampled coal is used for coal quality analysis).
(3) Weighing. Weighing mainly completes the measurement of the gross weight of coal-carrying vehicles.
(4) Peeling back. Treading mainly completes the measurement of the empty weight of the vehicle, and finally calculates the net weight.
(5) Real-time monitoring. Real-time monitoring mainly completes real-time monitoring of the process of sampling, weighing, and skinning, so as to know the situation of sampling, weighing and skinning vehicles in time for timely processing.
(6) Monitoring and management system. The monitoring and management system mainly completes the management and maintenance of basic system information, and the selection and setting of operating modes, etc.
Three, system design
1. The topology of the system
The network topology of the system is shown in Figure 1. Including: monitoring management system, vehicle queue management, weighing host, sampling host, peeling host, real-time monitoring, database server and other online workstations, etc. The unit systems are connected together through the intra-plant LAN to realize data sharing.
Figure 1 Network structure diagram of automatic metering system in loading area
2. System workflow
Figure 2 Work flow of automatic metering system
Before entering the loading area, all transport vehicles first go to the vehicle queue management office to sort the queues. Only the transport vehicles that have been sorted can enter the loading area. After the transportation vehicles are sorted, they enter the sampling platform for sampling. When sampling, it is necessary to judge whether the vehicle jumps into the queue, if it is a jumper vehicle, it will not be sampled. After the sampling is completed, the vehicle drives into the truck scale for gross weight measurement, unloads after the measurement is completed, and drives into the truck scale for tare measurement after the unloading is completed. After the measurement is completed, the net weight is automatically calculated. If an abnormal phenomenon occurs during the weighing and peeling process, the system will automatically notify the real-time monitoring system, and the monitoring personnel can deal with it in time to ensure the normal operation of the system. The system workflow is shown in Figure 2.
Four, system operation
According to the system workflow, the operation of the system is described in five parts below.
1. Vehicle queue management
The vehicle queue management realizes the management of the transportation vehicle queue, thereby reducing the occurrence of queue jumping and improving the traffic rate of vehicles. Automatic vehicle queue management is accomplished through the automatic vehicle number recognition system.
The automatic identification system of vehicle number mainly includes microwave radio frequency card, reader, radio frequency cable, antenna and automatic identification software of vehicle number. Each transport vehicle is equipped with a microwave radio frequency card, and each microwave radio frequency card corresponds to a vehicle number. The automatic identification of transportation vehicles can be achieved through the microwave radio frequency identification card. Each time a transportation vehicle passes, the automatic vehicle number identification system automatically generates a queue number for this vehicle as a sampled queue sequence. The advantage of using the automatic vehicle number recognition system is that there is no human intervention, and the vehicle queue is objective and accurate.
2. Sampling
An automatic vehicle number recognition system is installed at the sampling platform. When the transport vehicle enters the sampling platform, the automatic vehicle number identification system will automatically read the vehicle number information and determine whether the vehicle is a queue-jumping vehicle, and if it is, the sampling will be rejected.
3. Weighing
Figure 3 is a schematic diagram of the automatic weighing process. When the truck scale is ready for weighing, it can be driven into the truck scale for measurement.
Figure 3 Process diagram before, during and after weighing
In the case of other situations during the measurement process, such as the vehicle cannot be located or the vehicle number cannot be read, the measurement software will automatically give voice prompts and send an alarm to the monitoring center to remind the management personnel to deal with it. During the whole weighing process, no human operation is required.
4. Peel back
The process of peeling back is basically the same as weighing. The difference between the two is mainly in the content of some voice and alarm information.
5. Real-time monitoring
All information in the four operation processes of vehicle queue management, sampling, weighing and skinning are fed back to the monitoring center host in real time, and the management personnel can understand the status of each work process in real time through the monitoring software system. For example, there are vehicles that jump in line at the sampling site, the vehicles cannot be positioned during weighing and skinning, and the vehicle number cannot be read, etc., can all be understood in the monitoring center.
In order to ensure uninterrupted work in the loading area, the automatic metering system adopts two working modes: automatic mode and manual mode. Under normal circumstances, the automatic method is adopted. When some hardware equipment in the system fails and cannot work in an automatic manner, manual operation can be used to ensure the normal production of the loading area. Switch after the hardware equipment is repaired To automatic mode. The manual method is a backup method.
5. Equipment selection criteria
The automatic identification technology adopted by the intelligent vehicle weighing management system is the long-distance RFID system. The identification distance of the RFID system is required to be greater than 5m, there is no special requirement for the identification speed, there is no special requirement for the data capacity of the tag, and there is no special requirement for whether the tag has a rewriting function. The RFID system is required to have high reliability. The working environment of the equipment usually requires dustproof, temperature and humidity according to industrial-grade application standards.
The AOSID-0833 tag and AOSID-0703 tag reader and writer of Shenzhen Aosda Electronics Co., Ltd. can better meet the requirements of the application of automotive intelligent weighing management system.
Six, application effect analysis
The application of the automobile intelligent weighing management system launched by Shenzhen Aostar Electronics Co., Ltd. has played an important role in the automatic management of enterprise resources. On the one hand, it greatly improves the efficiency of resource warehousing measurement management, prevents loopholes in manual operation, and improves the working conditions and labor intensity of weighing measurement and transportation vehicle drivers. On the other hand, it has greatly promoted the pace of enterprise informatization construction, and has established an example of successful application of new technologies for the industry.
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