Imitation Of The Biological Tissue Material Ultrasound Characteristics Impedance Measurement Studies

This paper imitation of the Organization of ultrasound characteristic impedance measurement research. With the development of science and technology, both in medical ultrasound fields, or in the industrial field in both share a wide range of applications. The current constraints of ultrasonic technology development is an important factor in the design of ultrasound probe. Ultrasound impedance matching problem that ultrasonic signal attenuation, the ultrasound transmit and receive signals from satisfactory. According to acoustic impedance equivalent density and velocity of the product, the paper imitation biological tissue by measuring the density of materials and ultrasonic transmission speed of acoustic impedance, ultrasound and ultrasound probe impedance matching the choice of materials and provide a theoretical basis.In the design, mainly in a 51 SCM to sequence and data processing, including measurement of the density of the analog-digital converter clock signal, 3 M ultrasonic probe launched pulse and control signals, receiving the ultrasonic signal and synchronized LCD control signals. Ultrasonic signal through the effective isolation level, the use of LMH6624 operational amplifier for high-gain amplification. Circuit filter can improve signal to noise ratio, but the rate of a certain signal attenuation. Echo judge the effectiveness of ultrasonic detector circuit need to achieve, through the threshold of detection of ultrasound in a clear medium of communication time. Survey results from the LCD visual display.