A CMOS Pressure Sensor Tag Chip for Passive  Wireless Applications

Deng, Fang−Ming; He, Yigang; Li, Bing; Zuo, Lei; Wu, Xiang; Zhang, Fu

doi:10.3390/s150306872

Cited by 15 publications

(14 citation statements)

References 32 publications

(35 reference statements)

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“…However, restricted by the battery power supply, the working life of a WSN node lasts only two or three years, hence, the cost of the WSN technique is still high for large-scale commercial applications. Recently, owing to the progress of radio frequency identification (RFID) and sensor fabrication technology, online monitoring systems based on RFID sensor tags has been a hot topic [ 15 , 16 , 17 , 18 ]. Compared with existing WSN techniques, the ultra-high frequency RFID sensor tag has a shorter operating range, but it has a simple structure, low power consumption, and can work in passive mode due to its back-scattering mechanism.…”

Section: Introductionmentioning

confidence: 99%

Novel Concrete Temperature Monitoring Method Based on an Embedded Passive RFID Sensor Tag

Liu

Deng

et al. 2017

Sensors

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This paper firstly introduces the importance of temperature control in concrete measurement, then a passive radio frequency identification (RFID) sensor tag embedded for concrete temperature monitoring is presented. In order to reduce the influences of concrete electromagnetic parameters during the drying process, a T-type antenna is proposed to measure the concrete temperature at the required depth. The proposed RFID sensor tag is based on the EPC generation-2 ultra-high frequency (UHF) communication protocol and operates in passive mode. The temperature sensor can convert the sensor signals to corresponding digital signals without an external reference clock due to the adoption of phase-locked loop (PLL)-based architecture. Laboratory experimentation and on-site testing demonstrate that our sensor tag embedded in concrete can provide reliable communication performance in passive mode. The maximum communicating distance between reader and tag is 7 m at the operating frequency of 915 MHz and the tested results show high consistency with the results tested by a thermocouple.

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Section: Introductionmentioning

confidence: 99%

Novel Concrete Temperature Monitoring Method Based on an Embedded Passive RFID Sensor Tag

Liu

Deng

et al. 2017

Sensors

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“…We can obtain the number of assignment bits (p) that gives the maximum throughput by differentiating Equation (6).…”

Section: Description Of Tag Estimation Methodsmentioning

confidence: 99%

“…With the development of low-cost RFID tags [1][2][3], the bar code will soon be eliminated [4]. RFID technology enables objects to be distinguished from a long distance [5], and furthermore, passive RFID tags which collect energy from the RFID reader offer several advantages such as battery-less operation, wireless communication, high flexibility, low cost, and fast deployment [6]. Because there is only one communication channel between RFID reader and RFID tags, collision is a familiar problem in RFID systems, easily resulting in missing information and inefficient use of resources-particularly hardware resources [7].…”

Section: Introductionmentioning

confidence: 99%

Design of a Quaternary Query Tree ALOHA Protocol Based on Optimal Tag Estimation Method

Zhang

Deng

2016

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Radio Frequency Identification (RFID) technology is one of the most promising technologies in the IoT (The Internet of Things) era. Many RFID systems have been used in supermarkets or warehouses. There are two challenges for RFID anti-collision algorithms. The first challenge is accurately estimating the number of tags; the other is improving the efficiency of RFID systems. This paper proposes an optimal tag estimation method in which tags respond to the reader in assigned time slots instead of responding randomly. In order to improve the performance of the RFID system, a 4-ary query tree Additive Link On-line HAwaii (ALOHA) protocol is presented that combines the merits of query tree algorithm and frame slotted ALOHA, and avoids their weaknesses. Simulation results show that the proposed algorithm has a higher tag identification efficiency compared to other dynamic frame slotted ALOHA algorithms, and it can overcome the tag starvation phenomenon, because it traces each tag until all of them are identified successfully.

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“…In research laboratories all over the world, CMOS circuits integrated with transducers of different physical quantities are under intense investigation (RFID chips with internal sensors of temperature [38,39], pressure [40], humidity [41], etc.) where the most important problem is to cope with the energy deficit and measurement precision.…”

Section: Autonomous Rfid Sensormentioning

confidence: 99%

Factors Affecting the Synthesis of Autonomous Sensors with RFID Interface

Węglarski

Jankowski-Mihułowicz

2019

Sensors

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A general view on the problem of designing atypical battery-free, autonomous semi-passive RFID transponders-sensors (autonomous sensors with RFID interfaces) is presented in this review. Although RFID devices can be created in any of the electronic technologies, the design stage must be repeated each time when the manufacturing processes are changed, and their specific conditions have to be taken into consideration when modeling new solutions. Aspects related to the factors affecting the synthesis of semi-passive RFID transponder components on the basis of which the idea of the autonomous RFID sensor was developed are reflected in the paper. Besides their general characteristics, the operation conditions of modern RFID systems and achievements in autonomous RFID sensor technology are revealed in subsequent sections—they include such issues as technological aspects of the synthesis process, designing antennas for RFID transponders, determining RFID chip and antenna parameters, creating the interrogation zone IZ, etc. It should be pointed that the universal construction of an autonomous RFID sensor, which could be use in any application of the automatic object identification system, cannot be developed according to the current state of the art. Moreover, a trial and error method is the most commonly used in the today’s process of designing new solutions, and the basic parameters are estimated on the basis of the tests and the research team experience. Therefore, it is necessary to look for new inventions and methods in order to improve implementations of RFID systems.

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A CMOS Pressure Sensor Tag Chip for Passive Wireless Applications

Cited by 15 publications

References 32 publications

Novel Concrete Temperature Monitoring Method Based on an Embedded Passive RFID Sensor Tag

Novel Concrete Temperature Monitoring Method Based on an Embedded Passive RFID Sensor Tag

Design of a Quaternary Query Tree ALOHA Protocol Based on Optimal Tag Estimation Method

Factors Affecting the Synthesis of Autonomous Sensors with RFID Interface

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