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Distance sensing tasks in micromachine tools need to be performed with micrometer accuracy. For such tasks, FMCW radars with a combination of frequency and phase evaluations are a good choice. However, the accuracy cannot be freely increased as there are constraints on the target size and placement imposed by the limited space inside micromachines. This paper investigates the influence of target geometry...
In this paper, a miniaturized 122 GHz ISM band FMCW radar is used to achieve micrometer accuracy. The radar consists of a SiGe single chip radar sensor and LCP off-chip antennas. The antennas are integrated in a QFN package. To increase the gain of the radar, an additional lens is used. A combined frequency and phase evaluation algorithm provides micrometer accuracy. The influence of the lens phase...
A 61 GHz FMCWradar system with a bandwidth of 0.5 GHz is used for distance measurements to reach micrometer accuracy while providing a principally unlimited unambiguity range. The radar system is presented, followed by the lens antenna. The algorithm for the evaluation of the beat frequency is the real-time capable chirp-z transform. To minimize measurement errors an additional phase evaluation is...
Industrial automation requires highly precise distance measurement sensors. Accurate detection of the piston position is indispensable for the control and monitoring of hydraulic cylinder applications. Known external and integrated solutions are subject to many limitations as for example in accuracy, in measurement length, or in price. A promising approach consists in the use of precise and low-cost...
In this paper, a high precision 80 GHz radar distance measurement system is presented. It is based on an ultra-wideband SiGe monostatic transceiver chip, which enables a bandwidth of 25.6 GHz around a center frequency of 80 GHz (i.e. 32%). All components besides the silicon radar chip are off-the-shelf electronics, which makes the sensor well-suited for low-cost industrial measurement applications.
The FMCW radar technology offers the possibility to achieve very high target accuracy mainly limited by the SNR. In this paper the CRLB for an FMCW radar with phase evaluation is derived and different algorithms reaching the CRLB are presented. The algorithms are tested in a simulation and the simulation results are compared with measurement results of an existing FMCW radar. The used algorithms are...
Highly precise distance measurement sensors are essential in the field of industrial automation. In particular hydraulic cylinder applications require an accurate detection of the piston position by reason of controlling and monitoring. Currently used external as well as integrated solutions are limited by many factors. Using low-cost and precise radar sensors is a highly promising approach for these...
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