Accurate ranging of multiple objects using ultrasonic sensors

Audenaert, Katrien; Peremans, Herbert; Kawahara, Y.; Campenhout, J. Van

doi:10.1109/robot.1992.220128

Cited by 64 publications

(5 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Time delay estimation has applications in many signal processing areas, including radar communication, 16,17 speaker localization, [18][19][20][21] as well as blood velocity measurements. 22 To accurately estimate our time delays, we use a method that comes from radar theory, 23 called matched lter, briey described below.…”

Section: Measurement Setupmentioning

confidence: 99%

See 1 more Smart Citation

Olive oil density characterization through microfluidic detection using acoustic signatures (MIDAS)

et al. 2016

View full text Add to dashboard Cite

show abstract

Section: Measurement Setupmentioning

confidence: 99%

“…and it can be proven that this lter provides the optimal estimate of t o , in the least square sense. 23 Given the selection of the lter impulse response, h, as in ref.…”

Section: Measurement Setupmentioning

confidence: 99%

Olive oil density characterization through microfluidic detection using acoustic signatures (MIDAS)

et al. 2016

View full text Add to dashboard Cite

show abstract

“…Later, this technique was adopted within ultrasonic applications [3]. One of these is distance measurement in the mobile robot obstacle avoidance to locate multiple objects at the same time [4] and to eliminate frequent misreadings caused by crosstalk or external ultrasound sources [5,6]. Highperformance computing systems for the implementation of pulse compression techniques enable reliable and accurate distance measurement.…”

Section: Introductionmentioning

confidence: 99%

Performance analysis of ultrasonic ranging using a digital polarity correlator

Kodama

Nakahira

2012

Meas. Sci. Technol.

View full text Add to dashboard Cite

This paper presents performance analysis of the distance measurement using a digital polarity correlator applied to the ultrasonic ranging system, consisting of piezoelectric transducers for pulse echo operation and a pulse compression filter using chirp signals. Analytical and simulation results show that the technique of one-bit correlation is as effective as two-bit correlation with respect to signal-to-noise ratios and probability of detecting a target, and further that both methods approach results obtained from a complete correlation of received signals with a reference signal, in the case that the threshold of the received signals is adjusted with regards to the noise level. Experimental results show close agreement with the presented theory.

show abstract

“…In [2] it was proposed that a network of transputers be used for calculating the correlation between the signal received and an ''idealised echo signal'' (belonging to an isolated reflector in the absence of any noise). Working from the signal obtained, a peak search is made at the correlator output, rejecting those lesser to a certain threshold and those that are insufficiently separated.…”

Section: Introductionmentioning

confidence: 99%

Correlation detector based on a FPGA for ultrasonic sensors

Ureña

Mazo

Garcı́a

et al. 1999

Microprocessors and Microsystems

View full text Add to dashboard Cite

In the field of mobile robots ever more frequent use is being made of ultrasonic sensors composed of several transducers carrying out readings simultaneously and in a coordinated way. These sensors can read not only the distances but also listening angles, and they can also determine the reflector type (i.e. edge, plane or corner). To this end it is especially important that, after each emission of a pulse of ultrasound, each transducer can accurately detect the arrival of the echoes (providing accurate time-of-flight (TOF) readings). Another desirable feature is that the transducers be capable of discriminating between the echoes of simultaneous emissions (avoiding problems of crosstalk). This article describes the design and development of a correlation detector (implemented on a low-cost electronic system) allowing for both functions. ᭧

show abstract

Accurate ranging of multiple objects using ultrasonic sensors

Cited by 64 publications

References 5 publications

Olive oil density characterization through microfluidic detection using acoustic signatures (MIDAS)

Olive oil density characterization through microfluidic detection using acoustic signatures (MIDAS)

Performance analysis of ultrasonic ranging using a digital polarity correlator

Correlation detector based on a FPGA for ultrasonic sensors

Contact Info

Product

Resources

About