In the scenario of inventorying densely stacked tags, there exists an important problem of initial frame length selection in Radio Frequency Identification (RFID) dynamic frame slot anti-collision algorithm, a loaded ...
详细信息
With the development of radio frequency identification (RFID) technology, RFID systems on roads (RSR) have recently been put forward to localize not only manned vehicles but also autonomous vehicles. In such an RFID-b...
详细信息
With the development of radio frequency identification (RFID) technology, RFID systems on roads (RSR) have recently been put forward to localize not only manned vehicles but also autonomous vehicles. In such an RFID-based localization infrastructure, passive RFID tags with road-related information are deployed on road surfaces, and any vehicle equipped with an RFID reader can interrogate the tags to obtain its locations. However, like traditional RFID systems, reader collisions could occur when many vehicles (readers) continuously move in and out of a tag's reading range, significantly degrading tag reading performance. Although many anti-collision algorithms have been devised to improve tag reading efficiency, none can be applied in highly mobile and dynamic road environments. In this paper, we propose an adaptive mobile tag reading algorithm, which can effectively reduce reader collisions and improve tag reading efficiency for reliable vehicle localization under various traffic scenarios. Extensive simulation and experiment have verified the feasibility and the effectiveness of our proposed scheme. Particularly, the field tests demonstrate that, with moderate vehicle density and sparsely deployed tags, our proposed algorithm can satisfy the tag reading requirements specified by the upper-layer localization system with a probability as high as 0.976.
Traditional control of tower crane is mainly accomplished by PLC. As complex anti-sway collisionalgorithms and remote upgrading proposed, the traditional controller can not meet these requirements. This paper introdu...
详细信息
ISBN:
(纸本)9781479958252
Traditional control of tower crane is mainly accomplished by PLC. As complex anti-sway collisionalgorithms and remote upgrading proposed, the traditional controller can not meet these requirements. This paper introduces a novel type of tower crane controller constructed mainly by DSP28335, and details how the controller hardware designed and software accomplished. For anti-collision requirement, the paper gives specific algorithm and the theory of instructions. At the same time, remote upgrading can be accomplished by GPRS. Experimental results show that the new controller was fully realized the function of the original PLC controller. Not only can it realize the action required of the tower crane safely and stably, but also it can execute anti-collision algorithms effectively. After upgrading, the controller can run safely and stably.
This paper introduces several common binary tree anti-collision algorithms. They are binary tree algorithm, dynamic binary tree algorithm, and backward binary tree algorithm. Then, based on these algorithms, an improv...
详细信息
This paper introduces several common binary tree anti-collision algorithms. They are binary tree algorithm, dynamic binary tree algorithm, and backward binary tree algorithm. Then, based on these algorithms, an improved binary tree algorithm is proposed. Simulation and results analysis show that the improved binary anti-collision algorithm has higher performance than other binary tree algorithms, and improves the efficiency of RFID card reader searching card in multi-label environment.
The intelligent vehicle anti-collision system can effectively slow down or avoid the occurrence of traffic accidents and improve the driving safety of the *** time to collision(TTC) algorithm is not sufficient in anti...
详细信息
The intelligent vehicle anti-collision system can effectively slow down or avoid the occurrence of traffic accidents and improve the driving safety of the *** time to collision(TTC) algorithm is not sufficient in anti-collision algorithm when the accuracy characteristics of different sensors are ***,this paper proposes an improved TTC threshold calculation method considering the influence of sensor detection *** view of the influence of sensor detection error,a TTC probability model is *** this model,the host vehicle(HV) speed,the target vehicle(TV) speed and the relative distance between them are regarded as a random process,and their distribution functions are ***,these parameter distribution functions are used to construct the TTC probability model that approximates the normal distribution by Geary-Hinkley *** model uses the collision probability index to calculate more reasonable TTC *** results were produced and comparative analyses were conducted for different *** obtained results confirm the effectiveness of the proposed TTC probability model.
A kind of automobile comprehensive performance testing system based on wireless sensor networks is introduced by this paper. The system consists of a portable computer, the USB-Wireless protocol conversion module and ...
详细信息
ISBN:
(纸本)9781629939254
A kind of automobile comprehensive performance testing system based on wireless sensor networks is introduced by this paper. The system consists of a portable computer, the USB-Wireless protocol conversion module and wireless data acquisition module, which can be suitable for various types of vehicle performance testing. Portable computer communication with data acquisition module through USB-Wireless protocol conversion module. Optimum anti-collision algorithm is adopted in wireless transmission part, and the system synchronous data acquisition between different modules can be realized by time compensation. Test results show that, the data transmission is stable and reliable, high precision, high modularization, strong real-time performance and excellent portability.
This paper presents a case study to apply the RFID (Radio Frequency Identification)technology to dynamically track miscellaneous logistics information of the shipping containers to improve the container transportation...
详细信息
This paper presents a case study to apply the RFID (Radio Frequency Identification)technology to dynamically track miscellaneous logistics information of the shipping containers to improve the container transportation management and digitalization *** system architecture and configuration of the RFID system are illustrated and the requirements of the container RFID system are characterized. The hardware circuit of the electronic tags in an active RFID system is *** tags designed are of small volume and low power consumption with an identification sensitive distance up to *** anti-collision mechanism for the electronic tags is discussed and an adaptive anti-collision algorithm based on the slotted ALOHA algorithm is proposed. The proposed algorithm proves that it is effective to improve the message channel utilization rate and the tag identification rate.
Distribution equipment and physical assets of a wide range, a large part of the distribution network equipment in the long-term operation in the outdoor environment, bear the role of mechanical load and power load at ...
详细信息
Distribution equipment and physical assets of a wide range, a large part of the distribution network equipment in the long-term operation in the outdoor environment, bear the role of mechanical load and power load at the same time, but also bear the natural external forces. The above factors will promote the aging of the components, corrosion and oxidation, if not timely detection and elimination of equipment components of the security risks, will affect or even endanger the safe operation of power systems. With the rapid development of wireless communication technology in recent years, RFID is more and more widely used as a radio frequency identification technology. The combination of RFID and power system asset management can greatly reduce the manual operation and improve the efficiency of material and equipment management. This paper designs an asset management system of distribution network equipment based on RFID technology, analyzes the system information security technology, adopts the lightweight security authentication protocol of two-way message mutual authentication to enhance the security performance, and finally gives an improved anti-collision algorithm for binary search to enhance the system's multi-tag recognition efficiency and accuracy.
RFID system is widely used in many fields, such as industry automation, commercial automation and traffic control system. Tag collision, causing the RFID reader can not identify the tag data, is a serious problem as s...
详细信息
RFID system is widely used in many fields, such as industry automation, commercial automation and traffic control system. Tag collision, causing the RFID reader can not identify the tag data, is a serious problem as several tags use the same communication channel simultaneously. Framed slotted ALOHA algorithm is normally used to solve the RFID collision problem. It is simple and shows good performance when the tags number is small. But it requires an exponentially increasing number of slots with the tags number increasing. An improved anti-collision algorithm is proposed in this paper, which combines the tags frequencies division technique, the frequency poll hopping technique to the frame slotted ALOHA algorithm. The proposed algorithm has a lower collision probability and needs fewer slots with a tag identification efficiency improved significantly. The proposed algorithm has been used in 433 MHz RFID system and reduces the tag collision probability efficiently.
暂无评论