Development of a Microwave Proximity Sensor for Industrial Applications

Fericean, Sorin; Dorneich, Albert; Droxler, R.; Krater, D.

doi:10.1109/jsen.2009.2024058

Cited by 26 publications

(12 citation statements)

References 6 publications

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“…In this case, in order to delay the wideband frequency modulation signal, an RF cable having excellent time delay and wideband frequency characteristics is most appropriate and is disposed in a received path to be able to minimize the multiple reflection effect and is disposed after the down conversion to be able to reduce the cable cost and loss. Therefore, a wide sweep bandwidth and a wide antenna pass band with the RF cable delay provide a method to decrease the minimum range so that a detection blind zone in close range [3] does not occur. Further, in order to compensate for the gain change depending on the temperature of the receiving terminal, the gain of the receiving terminal is controlled by a variable amplifier (V.AMP).…”

Section: System Architecturementioning

confidence: 99%

“…When designing FMCW radars with high sensitivity for detecting small targets in a cluttered environment, the dominant cause of receiver noise floor degradation often comes from the reflected power from large radar targets at any ranges up to, and beyond the maximum instrumented range of the radar [2]. In addition, leakage noise signals may not be separated from the target signal in close range on a frequency, and since a size of the leakage noise signals is relatively larger than that of the reflected signal from the actual target, a detection blind zone in close range occurs [3], such that the range and the velocity of the target may not be measured within a very short range.…”

Section: Introductionmentioning

confidence: 99%

“…Medical imaging by near-field microwaves are built based in the contrast of the interaction of microwave signals with different biological tissue types [2]. At each change of tissue (change of dielectric constant), the microwave signal undergoes reflections, which lead to changes in the scattered signal, and after capture and processing, medical images are generated, which allows to detect eventual brain, malignant tissues, hypoxia, strokes, and ischemia [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

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FMCW transceiver of short‐range proximity sensor in sea clutter

Choi

Lee²,

Jung

et al. 2016

Micro & Optical Tech Letters

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A frequency-modulated continuous-wave (FMCW) transceiver of short-range proximity sensor in sea clutter is presented. A higher rejection of sea clutter is achieved by employing an FMCW modulation. The FMCW transceiver has wide bandwidth, low phase noise, super linearity to detect a target in short-range (some meters) against sea clutter having a radar cross section (RCS) relatively larger than that of the target. The performances of the proximity sensor are experimentally verified by an indoor test in a simulated sea clutter environment.ABSTRACT: We present a new fractal slot edge antipodal Vivaldi antenna (AVA). When compared to a conventional AVA, it simultaneously extends the low-end bandwidth limitation, mitigates the side lobe level, and increases the main lobe gain.

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Section: System Architecturementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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FMCW transceiver of short‐range proximity sensor in sea clutter

Choi

Lee²,

Jung

et al. 2016

Micro & Optical Tech Letters

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“…According to the working principle, the proximity sensor can be categorized into capacitive sensor, ultrasonic sensor, optical sensor, infrared sensor, electromagnetic induction sensor and microwave sensor (Lu et al , 2018; Min et al , 2010; Kim and Joo, 2016; Chen et al , 2011; Ripka et al , 2021; Huang et al , 2022; Matheoud et al , 2019; Fericean et al , 2009). As one kind of proximity sensors, capacitive sensor has the advantages of high sensitivity, high compatibility, low power consumption and simple structure (Ponce Wong et al , 2012).…”

Section: Introductionmentioning

confidence: 99%

A parallel ring-ring capacitive proximity sensor for detection of approaching conductor

Shi,

Huang,

Wang

et al. 2023

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Purpose To solve the problem of low sensitivity of traditional capacitive proximity sensor, this paper aims to propose a novel capacitive sensor for detection of an approaching conductor. Design/methodology/approach Five capacitive proximity sensors with different structures are designed and the performance is compared with the traditional capacitive sensor. The impacts of geometrical parameters on the performance of the proposed capacitive sensor are studied. Furthermore, the sensitivity of the proposed capacitive sensor to an approaching conductor with different sizes is discussed. Also, how the designed capacitive sensor is sensitive to the lateral placement of the approaching object is analyzed. Findings Several capacitive proximity sensor structures have been designed and analyzed. It is found that the capacitive sensor with the top small ring-bottom large ring structure shows stronger electric field distribution around the top electrode and higher sensitivity to the approaching conductor than other sensors. Through further analysis of the proposed sensor, the results demonstrate that proposed capacitive sensor is effective for proximity object detection. Originality/value This paper proposes a novel capacitive proximity sensor with top small ring-bottom large ring structure. Compared with the traditional capacitive sensor, the proposed capacitive sensor is more sensitive to the approaching object. This would be helpful for the accurate detection of the approaching object. Also, the top and bottom electrodes are much smaller.

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“…These sensors can be classified into the environmental monitoring sensor system depending on the target, such as temperature, motion, and pressure. As the most representative sensors, the proximity sensor is a kind of noncontact device that can detect the presence of a nearby object using capacitance, light, electromagnetic field, electromagnetic wave, etc [3][4][5][6][7][8][9][10][11][12]. Among them, noncontact capacitive sensors, which are based on measuring the change in capacitance of the material with respect to the surrounding or approaching objects, are ubiquitous because of their simple design, low cost, and low consumption [13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Development of highly sensitive capacitive proximity sensor based on stacked monocharged electrets

Lee¹,

Cho²,

Jang³

et al. 2022

Funct. Compos. Struct.

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Recently, the demand for miniaturization and high sensitivity of the capacitive proximity sensors has increased noticeably for development of sensor networks. However, the volume and weight of conventional sensor devices are emerging as limitations in the practical application. In this paper, the stacked electrets-based highly sensitive noncontact capacitive sensor system (SENS) is proposed. The SENS is fabricated in compact-sized and light weight because electrets, which are dielectric materials that have quasi-permanent injected electric charges so can form external electric field, substitute the transmitter electrode and the external power source. Also, sensitivity of the SENS is effectively improved by stacking electrets. For experimental analysis, the electrostatic properties of the stacked electrets, which are due to the injected charges, and resultant influences on the sensitivity of the SENS are studied. In addition, based on experimental results, a proximity notification system with the SENS is developed using a LabVIEW program to demonstrate the practicality of the SENS.

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Development of a Microwave Proximity Sensor for Industrial Applications

Cited by 26 publications

References 6 publications

FMCW transceiver of short‐range proximity sensor in sea clutter

FMCW transceiver of short‐range proximity sensor in sea clutter

A parallel ring-ring capacitive proximity sensor for detection of approaching conductor

Development of highly sensitive capacitive proximity sensor based on stacked monocharged electrets

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