Active ultrasonic probe circuit capable of transmitting signals with twin wire

Abstract

The invention discloses an active ultrasonic probe circuit capable of transmitting signals with a twin wire, which comprises an ultrasonic sensor, a sensor signal receiving and amplification circuit, a transformer, a working power generating circuit and a host machine signal transmission circuit, wherein the working power generating circuit respectively supplies power to the other circuits; the output end of the host machine signal transmission circuit is connected with the sensor and transmits ultrasonic signals; the reflection echo output end of the sensor is connected to the input end of the signal receiving and amplification circuit; the input end of the working power generating circuit, the output end of the sensor signal receiving and amplification circuit, and the input end of the host machine signal emission circuit are the same end and connected with the corresponding input / output port in the host machine through one strand of the twin wire; and the other strand of the twin wire is connected between the host machine and the common ground of the circuits. The invention adopts simple circuits, and can complete the circuit by using a common twin wire instead of a shielding wire; and the invention effectively enhances the reliability of the active ultrasonic probe circuit, and has the advantages of simple circuit, low cost and favorable anti-interference performance.

Description

technical field [0001] The invention relates to the field of active ultrasonic probe circuits, in particular to an active ultrasonic probe circuit that transmits signals with double-strand wires. Background technique [0002] At present, ultrasonic probes are generally divided into passive ultrasonic probes and active ultrasonic probes. The working principle of the active ultrasonic probe is: the host signal transmitting circuit transmits the signal transmitted by the host to the sensor through the transformer, and the sensor outputs it; the sensor receives the reflected tiny signal, amplifies it through the signal amplifier, and then transmits it to the host for processing the signal. deal with. In this process, the host transmits the signal and the sensor receives the signal. If the processing is not careful, the two signals will interfere with each other, which will reduce the reliability of the active ultrasonic probe. To solve this problem, shielded wires and integrat...

AI Technical Summary

Problems solved by technology

In order to solve this problem, the existing technology generally uses shielded wires and integrated circuits to design this circuit, which has high cost and poor anti-interference effect

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