A high accuracy microwave ranging system for industrial applications

Woods, G.S.; Maskell, Douglas L.; Mahoney, Matthew V.

doi:10.1109/19.234490

Cited by 59 publications

(20 citation statements)

References 3 publications

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“…4. The registered phase difference has been converted to displacement of the target, according to (3). The obtained results are shown in Fig.…”

Section: Methodsmentioning

confidence: 99%

“…Afterwards, consecutive FFTs are obtained, and change of phase of the discrete frequencies associated with the detected targets is tracked. From the changes of the phases between successive FFTs, displacement of the targets can be obtained (3). To ensure that the phase changes are caused only by target's displacement, the sampling of the IF signal must be strictly synchronized with the FMCW modulating waveform.…”

Section: B Signal Processing Descriptionmentioning

confidence: 99%

“…These properties have caused the widespread use of FMCW radar technology for example in automotive applications as Adaptive Cruise Control (ACC) and Collision Warning/Avoidance (CW/A) systems [1], or industrial applications [2]. Whereas in automotive applications the requirements for ranging precision are usually tens of centimeters, which in most cases is easily feasible, certain industrial applications like level gauging, machine control or structural health monitoring (SHM) require precision well below millimeters [3]. In such cases frequency evaluation of the radar's intermediate frequency (IF) signal cannot provide the required precision.…”

Section: Introductionmentioning

confidence: 99%

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K-band FMCW radar module with interferometic capability for industrial applications

Kaminski

Staszek

Wincza

et al. 2014

2014 15th International Radar Symposium (IRS)

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A newly developed, low cost FMCW radar system for industrial applications operating in K band has been presented. The radar features interferometric capability, which gives it sub-millimeter accuracy in distance variation measurement. Moreover, the presented radar has fully embedded signal processing with real time monitoring capability, thus making the presented sensor suitable for fully autonomous operation. The radar performance has been experimentally verified. Mean accuracy better than 30 μm has been achieved in displacement measurement test. The obtained results in terms of high accuracy and high measurement repetition rate prove the radar capable of meeting rigorous requirements of applications like structural health monitoring or industrial process control.

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“…4. The registered phase difference has been converted to displacement of the target, according to (3). The obtained results are shown in Fig.…”

Section: Methodsmentioning

confidence: 99%

Section: B Signal Processing Descriptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

K-band FMCW radar module with interferometic capability for industrial applications

Kaminski

Staszek

Wincza

et al. 2014

2014 15th International Radar Symposium (IRS)

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show abstract

“…This leads to some difficulty in realizing a high-quality signal source at low cost. On the other hand, two-tone continuous-wave (CW) radar has been well known in terms of its simplicity and range accuracy [5]. However, the CW radar has its own problem of phase ambiguity, which directly causes range ambiguity.…”

Section: Introductionmentioning

confidence: 99%

Software-Defined Six-Port Radar Technique for Precision Range Measurements

Zhang

Li²,

Wu³

2008

IEEE Sensors J.

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A software-defined radar measurement system on the basis of a six-port receiver technique is proposed and described in this paper. The system makes use of a hybrid scheme of two performance-complementary operating modes, namely, frequency-modulated continuous-wave (FMCW) and two-tone continuous-wave signals. Generally, the FMCW-based measurement technique is deployed to give an approximate range value of target while the two-tone continuous-wave (CW)-based measurement technique can accurately determine the range that may, however, be ambiguous. The six-port circuit is used for the receiver as a precision phase detector in two-tone CW function and at the same time as a mixer in FMCW function. Various waveforms are generated in direct digital synthesizers and processed by different algorithms in a digital signal processor. The switching between the frequency-modulated CW and two-tone CW functions is controlled by software to improve the resolution and ensure a reliable operation. A system prototype is designed and made for a C-band demonstration. The Schottky diodes used as power detectors in the six-port are calibrated so that they can be used beyond the square-law region, thus allowing a higher power level and a better dynamic range. Measured results validate the proposed software-defined platform and accurate range results are confirmed.Index Terms-Frequency-modulated continuous wave (FMCW), range measurement, sensor, six-port receiver, software-defined technique, two-tone continuous-wave (CW) radar.

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“…T HERE is a strong market demand for highly integrated CW-radar sensors with a high sensitivity to small displacements because of the wide range of use for such systems, which includes medical applications [1], surface-level measurements [2], and highly precise short-distance measurements for industrial applications [3], to mention some examples.…”

Section: Introductionmentioning

confidence: 99%

LTCC Endfire Antenna With Housing for 77-GHz Short-Distance Radar Sensors

Rusch

Beer

Zwick

2012

Antennas Wirel. Propag. Lett.

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An integrated antenna concept for miniaturized industrial short-distance continuous-wave (CW) radar-systems is presented. Highly accurate measurements with objects in the antenna's near field place special demands on the antenna design. By simulations, the letter shows a reduced phase error at short-distance measurements caused by the usage of corrugations and a novel housing concept. In addition to the increased accuracy the housing protects the sensor from cooling liquids and flying debris. This protection is further reinforced by a polymeric covering that does not influence the measurement accuracy, but allows the on-the-fly observation of metal cutting processes. Different covering polymers are determined relating to the antenna properties and resistance against chemicals. The influences on the beam shape and return loss are shown and verified by measurements.

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A high accuracy microwave ranging system for industrial applications

Cited by 59 publications

References 3 publications

K-band FMCW radar module with interferometic capability for industrial applications

K-band FMCW radar module with interferometic capability for industrial applications

Software-Defined Six-Port Radar Technique for Precision Range Measurements

LTCC Endfire Antenna With Housing for 77-GHz Short-Distance Radar Sensors

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