A non-contact passive electromagnetic transmitter to any capacitive sensor — design, theory, and model tests

Jachowicz, Ryszard; Wójtowicz, G.; Weremczuk, Jerzy

doi:10.1016/s0924-4247(00)00398-8

Cited by 19 publications

(7 citation statements)

References 2 publications

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“…It can be seen that at distance 5 cm (horizontal shift) and 8 cm (vertical shit) the BER significantly increases. Transceiver and sensor coils misalignment is not as important as was observed for analogue interface [3] -interface operates well in the distance shorter than 5 cm.…”

Section: Testsmentioning

confidence: 77%

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Smart sensors interface for wireless data and power transmission

Weremczuk

Płotczyk

Tarapata

et al. 2009

2009 IEEE Intrumentation and Measurement Technology Conference

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The paper presents the interface designed for wireless data and power transmission. The interface operation idea was tested using build up hardware and software. The sample construction of the temperature sensor embedded with this type interface was designed. Measurements show that the sensor can be wirelessly supplied with energy and is capable to sent data (temperature readings) in 5 cm distance. The interface is universal and can be used after some modifications with any type of sensors.

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Section: Testsmentioning

confidence: 77%

“…The sensor structure has not wire connections and is encapsulated to protect electronic circuits from environment destroying influence. Required supply energy is transmitted to the sensor wirelessly using special coils embedded in sensor structure and in transceiver [1,2,3]. Those coils are also used for digital data transmission.…”

Section: Introductionmentioning

confidence: 99%

Smart sensors interface for wireless data and power transmission

Weremczuk

Płotczyk

Tarapata

et al. 2009

2009 IEEE Intrumentation and Measurement Technology Conference

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“…To overcome these problems, a passive wireless system that does not require batteries in the sensor circuit has been developed. A passive wireless system usually involves electromagnetic coupling using two inductors such as a radio-frequency (RF) tag or radio-frequency identification [96, 97]. For passive intelligent tires, Matsuzaki et al [81] used electromagnetic coupling between the two inductors of the antenna and sensor with an inductance capacitance (LC) resonant circuit.…”

Section: Wireless Data Transmissionmentioning

confidence: 99%

Wireless Monitoring of Automobile Tires for Intelligent Tires

Matsuzaki

Todoroki

2008

Sensors

102

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This review discusses key technologies of intelligent tires focusing on sensors and wireless data transmission. Intelligent automobile tires, which monitor their pressure, deformation, wheel loading, friction, or tread wear, are expected to improve the reliability of tires and tire control systems. However, in installing sensors in a tire, many problems have to be considered, such as compatibility of the sensors with tire rubber, wireless transmission, and battery installments. As regards sensing, this review discusses indirect methods using existing sensors, such as that for wheel speed, and direct methods, such as surface acoustic wave sensors and piezoelectric sensors. For wireless transmission, passive wireless methods and energy harvesting are also discussed.

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“…Similar to sensors with digital signal transmission, in passive wireless sensors with analog signal transmission, often the mutual inductance coupling M between the pickup coil and the sensor is controlled (see Equation (1)). Such control can be achieved through a fixed positioning of the sensors in relation to the pickup coil [33]. In addition, several straightforward methods have been demonstrated to eliminate possible repositioning error effects.…”

Section: Comparison Of Analog and Digital Rfid Sensor-data Transfermentioning

confidence: 99%

RFID sensors based on ubiquitous passive 13.56‐MHz RFID tags and complex impedance detection

Potyrailo

Morris

Sivavec

et al. 2008

Wireless Communications

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Passive radio frequency identification (RFID) sensors are attractive in diverse applications where sensor performance is needed at a low cost and when battery-free operation is critical. We developed a general approach for adapting ubiquitous and cost-effective passive 13.56-MHz RFID tags for diverse sensing applications. In developed RFID sensors, the complex impedance of the RFID resonant antenna is measured and correlated to physical, chemical, or biological properties of interest. In contrast to known wireless sensors, developed RFID sensors combine several measured parameters from the resonant sensor antenna with multivariate data analysis and deliver unique capability for multianalyte sensing and rejection of environmental interferences with a single sensor. Theoretical calculations and experiments in an anechoic chamber demonstrate that the developed RFID sensors are immune to common electromagnetic interferences and the sensor/reader system operates within regulated emission levels. Performance of developed RFID sensors is illustrated in measurements of toxic industrial chemicals (TICs) in air with the detection limit (DL) of 80 parts per billion and in a non-invasive monitoring of milk spoilage. Sensors selectivity is demonstrated in the detection of different vapors with individual sensors. designs such as resonant inductor-capacitor [1,2], magnetoelastic [3], thickness shear mode [4], and surface-acoustic wave [5,6] transducers. Examples of detected physical parameters using these sensors Fig. 9. Results of extended-length experiment of the response of the RFID sensor for toxic volatile polar and nonpolar vapors TCE, MeOH, and Tol. (A) Sensor exposure to four replicate sets of 0-0.20 P/Po concentrations of three tested vapors. (B) Rapid response and recovery times of the sensor to three tested vapors. Insets show the response and recovery times of less than 1 min for 0.04 P/Po of TCE, MEOH, and Tol.

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A non-contact passive electromagnetic transmitter to any capacitive sensor — design, theory, and model tests

Cited by 19 publications

References 2 publications

Smart sensors interface for wireless data and power transmission

Smart sensors interface for wireless data and power transmission

Wireless Monitoring of Automobile Tires for Intelligent Tires

RFID sensors based on ubiquitous passive 13.56‐MHz RFID tags and complex impedance detection

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