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Intermediate-frequency ultrasonic signal processing application system received by energy converter

A signal processing and application system technology, applied in the field of ultrasound, can solve the problems of high AD chip, complex circuit, and limitation of ultrasonic signal sampling frequency, etc., and achieve the effect of reducing components, reducing design difficulty, reducing cost and application difficulty

Inactive Publication Date: 2020-09-29
SHANGHAI JIAO TONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the circuit has higher requirements on the AD chip, the circuit is more complicated, and there is a higher limit on the sampling frequency of the ultrasonic signal.

Method used

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  • Intermediate-frequency ultrasonic signal processing application system received by energy converter

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The invention adopts a dual-channel voltage feedback amplifier and a four-stage amplification filter sampling method of an RF power detector to realize the detection of ultrasonic reflection signals.

[0037] The present invention adopts a special amplifier, that is, a logarithmic detector, as a post-stage signal processing. The peripheral circuit of the special signal amplifier is simple, and the routing requirements of the signal line on the circuit board are not high, and the signal processed in the above four steps can be directly processed by frequency. The conversion between the domain and the time domain directly obtains the envelope of the effective signal, and the converted signal can be read and sampled by a general-performance ADC chip or an ADC module integrated on the MCU to obtain effective data.

[0038] An intermediate frequency ultrasonic signal processing application system received by a transducer according to the present invention includes:

[0039] ...

Embodiment 2

[0059] Embodiment is a modification of embodiment 1

[0060] The ultrasonic reflection signals SONAR_A and SONAR_B in the signal sampling circuit are sampled by the filter capacitor and the half bridge, and the signal is loaded on both ends of the resistor R47 to form a differential signal, and the differential signal is input to the RC filter circuit again to obtain the differential signal into the first-level signal amplification circuit middle.

[0061] In the signal sampling circuit, the amplifier sampling dual power supply works

[0062]After the output signal is low-pass filtered by resistors R45 and R48 to remove burrs and noise signals, it is input to the second and third pins of the amplifier U8 to amplify the signal by 100 times and output it. The signal measurement point E5 can measure the amplified signal. The amplified signal is input to the sixth pin of the amplifier U8 to increase the output impedance of the signal. The output signal can be measured at the sign...

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Abstract

The invention provides an intermediate-frequency ultrasonic signal processing application system received by an energy converter. The intermediate-frequency ultrasonic signal processing application system comprises a signal sampling circuit, a first-stage signal amplification circuit, a second-stage signal band-pass filtering amplification circuit, a third-stage signal band-pass filtering amplification circuit and a fourth-stage RF power detection circuit. The output end of the signal sampling circuit is connected with the input end of the first-stage signal amplification circuit; the output end of the first-stage signal amplification circuit is connected with the input end of the second-stage signal band-pass filtering amplification circuit; the output end of the second-stage signal band-pass filtering amplification circuit is connected with the input end of the third-stage signal band-pass filtering amplification circuit; and the output end of the third-stage signal band-pass filtering amplification circuit is connected with the fourth-stage RF power detection circuit.According to the signal processing application system, analog-to-digital conversion and effective reading of signals can be realized without professional signal processing knowledge, so that the signal processing difficulty is greatly reduced.

Description

technical field [0001] The present invention relates to the field of ultrasound, in particular to an application system for processing an intermediate-frequency ultrasound signal received by a transducer, and more specifically to an application circuit for ultrasound reflection signals. Background technique [0002] Most of the existing technologies use ADC chips with large bandwidth, high precision, and ultra-high-speed sampling to process signals. The peripheral circuits of high-performance ADC chips are also relatively complicated. are demanding. At the same time, the high-performance ADC will sample and read all the signals after the above 4-step processing, which will generate a large amount of data (which still contains some clutter signals), and these data need to be transformed by Fourier transform. The signal is converted from the frequency domain to the time domain, and then the envelope of the signal is extracted for effective processing. Therefore, it is difficu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/26H03F3/68H03F3/45H03M1/12
CPCH03F1/26H03F3/45H03F3/68H03M1/12
Inventor 盛伟周朦
Owner SHANGHAI JIAO TONG UNIV
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