Method and apparatus for measuring photoacoustic signal in biological tissue by ultrasonic beams
A biological tissue and acoustic signal technology, applied in the field of measurement, can solve problems such as poor signal-to-noise ratio, undetectable signal, weak photoacoustic signal, etc., and achieve the effects of easy assembly, improved signal-to-noise ratio, and convenient operation
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[0028] Such as figure 1 As shown, the device of the present invention is mainly composed of a laser 1, an ultrasonic generating assembly 2, an acoustic signal measuring assembly 3, a signal amplifier 4, a data acquisition card 5, a real-time Fourier transform module 6, and a computer 7; wherein the ultrasonic generating assembly 2 is composed of a function generator 2-1, the power amplifier 2-2, the ultrasonic transducer 2-3 and the ultrasonic lens 2-4 are sequentially connected to form; wherein the ultrasonic lens 2-4 is fixed with the ultrasonic transducer 2-3 by a screw cover, and other connections are sequentially It is an electrical connection; the ultrasonic generating component 2 is acoustically connected to the acoustic signal measuring component 3; the acoustic signal measuring component 3, the signal amplifier 4, the data acquisition card 5, the real-time Fourier transform module 6, and the computer 7 are electrically connected in turn. Other components are: sample 8...
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