Patent
Method and device for checking ultrasonic water immersion piezoelectric probe
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TLDR
In this article, a method and device for checking ultrasonic water immersion piezoelectric probe sensitivity is presented, which comprises the steps of carrying out connection on a pulse generator and an external resistor, and measuring an input current signal; separating the pulse generator from the external resistor; and multiplying the output current signal by the resistance value sum of both external resistor and the external generator to obtain a first product, dividing the second product by the first product and then solving a square root.Abstract:
The invention discloses a method and device for checking ultrasonic water immersion piezoelectric probe The method comprises the steps of carrying out connection on a pulse generator and an externalresistor, and measuring an input current signal; separating the pulse generator and the external resistor, carrying out connection on the pulse generator and a probe, and measuring an output current signal flowing through the probe; obtaining an acoustic propagation function, acoustic radiation impedance, a resistance value of the external resistor and the resistance value of the pulse generator;and multiplying the output current signal by resistance value sum of the external resistor and the pulse generator to obtain a first product, carrying out multiplication on the input current signal, the acoustic propagation function and the acoustic radiation impedance to obtain a second product, dividing the second product by the first product and then solving a square root, thereby obtaining sensitivity of the probe According to the technical scheme provided by the invention, the sensitivity of the probe can be measured only by measuring the current signal, a test process is simplified, andthe problem that impedance is mismatched in a conventional circuit is solvedread more
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References
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Apparatus and method for obtaining ultrasonic backcatter measurement from tissue
TL;DR: Optimal measurement of ultrasonic random backscatter from the myocardium is obtained by band limiting and whitening the received signal, squaring, summing and scaling same.
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Ultrasonic probe and manufacturing method thereof
TL;DR: In this article, an ultrasonic probe capable of easily discharging heat generated from the ultrasonic probes by using porous carbon allotrope foam is presented. But the authors do not consider the use of sound abruption material.
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Measurement methods of ultrasonic transducer sensitivity.
TL;DR: The definition of sensitivity and reciprocity of ultrasonic transducer is studied and four common methods which are used to measure the disc-vibrator transducers sensitivity are discussed in current investigation.
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A self-reciprocity calibration method for broadband focused transducers
TL;DR: Experimental results indicate that the transfer function of the broadband, spherically focused ultrasonic transducers is insensitive to on-axis reflector placement, which supports the feasibility of integrating the calibration procedure into actual testing in some situations.
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Reverse channel estimation for RF transceiver with beamforming antenna
TL;DR: In this paper, a configuration controller generates the first plurality of steering weights based on a reverse channel estimation of the first communication channel, where the first transmissions and the second transmissions are via a first communications channel.
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