Method and device for detecting elasticity of viscous elastic medium
DCFirst Claim
1. A method for detecting an elasticity of a viscoelastic medium, comprising steps of:
- a) detecting with a pressure sensor array a pressure applied to the viscoelastic medium by an ultrasonic transducer probe;
b) detecting with the pressure sensor array a verticality of the ultrasonic transducer probe relative to the viscoelastic medium;
c) in response to the detected pressure and the detected verticality satisfying preset conditions, driving the ultrasonic transducer probe with a vibration by a vibrator so as to produce an elastic wave to be propagated in the viscoelastic medium, transmitting an ultrasonic wave to the viscoelastic medium by the ultrasonic transducer probe at a pulse repetition frequency of 100 Hz-100000 Hz, and collecting through the ultrasonic transducer probe an ultrasonic echo returned from the viscoelastic medium and corresponding to the transmitted ultrasonic wave;
d) selecting an effective ultrasonic echo from the ultrasonic echo according to a duration of the vibration and physical parameters of the viscoelastic medium, wherein the ultrasonic transducer probe stops vibrating and the elastic wave is propagated in the viscoelastic medium at a moment corresponding to the effective ultrasonic echo;
e) calculating a propagation velocity of the elastic wave in the viscoelastic medium according to the effective ultrasonic echo; and
f) calculating the elasticity of the viscoelastic medium according to the propagation velocity of the elastic wave.
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Accused Products
Abstract
A method for nondestructively detecting an elasticity of a viscoelastic medium and a device for nondestructively detecting an elasticity of a viscoelastic medium are provided. The method comprises steps of: a) driving an ultrasonic transducer probe with a low-frequency vibration by a vibrator so as to produce an elastic wave to be propagated in the viscoelastic medium, transmitting an ultrasonic wave to the viscoelastic medium by the ultrasonic transducer probe, and collecting an ultrasonic echo returned from the viscoelastic medium; b) selecting an effective ultrasonic echo from the ultrasonic echo according to a duration of the low-frequency vibration and physical parameters of the viscoelastic medium; c) calculating a propagation velocity of the elastic wave in the viscoelastic medium according to the effective ultrasonic echo; and d) calculating the elasticity of the viscoelastic medium according to the propagation velocity of the elastic wave.
13 Citations
12 Claims
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1. A method for detecting an elasticity of a viscoelastic medium, comprising steps of:
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a) detecting with a pressure sensor array a pressure applied to the viscoelastic medium by an ultrasonic transducer probe; b) detecting with the pressure sensor array a verticality of the ultrasonic transducer probe relative to the viscoelastic medium; c) in response to the detected pressure and the detected verticality satisfying preset conditions, driving the ultrasonic transducer probe with a vibration by a vibrator so as to produce an elastic wave to be propagated in the viscoelastic medium, transmitting an ultrasonic wave to the viscoelastic medium by the ultrasonic transducer probe at a pulse repetition frequency of 100 Hz-100000 Hz, and collecting through the ultrasonic transducer probe an ultrasonic echo returned from the viscoelastic medium and corresponding to the transmitted ultrasonic wave; d) selecting an effective ultrasonic echo from the ultrasonic echo according to a duration of the vibration and physical parameters of the viscoelastic medium, wherein the ultrasonic transducer probe stops vibrating and the elastic wave is propagated in the viscoelastic medium at a moment corresponding to the effective ultrasonic echo; e) calculating a propagation velocity of the elastic wave in the viscoelastic medium according to the effective ultrasonic echo; and f) calculating the elasticity of the viscoelastic medium according to the propagation velocity of the elastic wave. - View Dependent Claims (2, 3, 4, 5)
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6. A device for detecting an elasticity of a viscoelastic medium, comprising:
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a vibrator producing a vibration; an ultrasonic transducer probe driven by the vibrator with the vibration so as to produce an elastic wave to be propagated in the viscoelastic medium; a control apparatus connected with the ultrasonic transducer probe and the vibrator respectively, and configured to control the ultrasonic transducer probe to transmit an ultrasonic wave to the viscoelastic medium and to collect through the ultrasonic transducer probe an ultrasonic echo returned from the viscoelastic medium and corresponding to the transmitted ultrasonic wave, the control apparatus being further configured to select an effective ultrasonic echo from the ultrasonic echo according to a duration of the vibration and physical parameters of the viscoelastic medium, and to calculate a propagation velocity of the elastic wave in the viscoelastic medium according to the effective ultrasonic echo, and to calculate the elasticity of the viscoelastic medium according to the propagation velocity of the elastic wave, wherein the ultrasonic transducer probe stops vibrating and the elastic wave is propagated in the viscoelastic medium at a moment corresponding to the effective ultrasonic echo; and a pressure sensor array mounted between and contacted with the ultrasonic transducer probe and the vibrator, wherein the control apparatus further comprises a pressure signal collecting circuit connected with one of a computer, a microprocessor and a microcontroller through a communication interface, and wherein the control apparatus detects with the pressure sensor array a pressure applied to the viscoelastic medium by the ultrasonic transducer probe and a verticality of the ultrasonic transducer probe relative to the viscoelastic medium, and wherein the control apparatus is further configured to start to detect the elasticity of the viscoelastic medium in response to the detected pressure and the detected verticality satisfying preset conditions. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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Specification