Method and device for detecting physical property of object

Abstract

The invention discloses a method and device for detecting a physical property of an object. The method comprises the following steps: transmitting fixed frequency, ultrasonic waves with fixed amplitude and composite sound waves of low-frequency sound waves to a target object; receiving reflected waves of the ultrasonic waves; contrasting the phase change and amplitude change of the transmitting waves and reflected waves of the ultrasonic waves, so as to analyze the physical property of the object. The device comprises a controller, an analyzer, an ultrasonic receiver, a low-frequency sound wave generator and an ultrasonic generator, wherein the controller is connected with the ultrasonic generator and the low-frequency sound wave generator, and controls the transmitting of the ultrasonic generator and the low-frequency sound wave generator; the ultrasonic receiver is connected with the analyzer and further receives reflected waves of the ultrasonic waves, converts the reflected waves to an electrical signal and sends the electrical signal to the analyzer; the analyzer contrasts the phase change and amplitude change of transmitting waves and reflected waves of the ultrasonic waves and analyzes the physical property of the object. The method is simple, small in calculated amount and accurate in result, and the device is simple in structure and low in price.

Description

technical field [0001] The invention relates to the field of ultrasonic applications, in particular to a method and a device for detecting physical properties of objects. Background technique [0002] In the process of ultrasonic transmission, reflection and refraction will occur when encountering the interface. The strength of the reflected wave is closely related to the physical properties such as the density and hardness of the interface. Certain methods such as the Doppler effect can be used to analyze the transmitted wave and reflected wave of the ultrasonic wave. , so as to obtain the physical properties of the interface object. In the prior art, if the sound source and the target object are relatively stationary, it is difficult to quantitatively analyze the physical properties of the target object such as elasticity based on the reflected wave of the ultrasonic wave, and the use of the Doppler effect is only limited to the analysis of the target moving speed, which i...

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Problems solved by technology

In the prior art, if the sound source and the target object are relatively stationary, it is difficult to quantitatively analyze the physical properties of the target object such as elasticity based on the reflected wave of the ultrasonic wave, and the use of the Doppler effect is only limited to the analysis of the target moving speed, which is difficult to use Quantitative analysis of physical properties such as elasticity of the target object, and the equipment is expensive

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