Pulse signal conversion device for acquiring and synchronously triggering sound field measured data of ultrasonic phased array energy converter

Abstract

The invention provides a signal conversion device used in a sound field scanning system of an ultrasonic phased array energy converter. The signal conversion device has the function of converting a single-path pulse signal into a double-path difference encoder signal to finish the stimulation of the energy converter and the synchronous triggering of a data acquisition card. The signal conversion device utilizes independent elements including a logic inverter, a resistor, a capacitor and the like, RC (Remote Control) respond properties and reshaping properties of a logic gate circuit are used to realize the delaying of single-path pulses, so as to generate the double-path difference encoder signal with a certain phase difference. According to the signal conversion device, the pulse quantity of an encoder is the same as the quantity of input pulses and the widths of two paths of the pulses keep the same. An output signal is converted into a difference signal by using a phase inverter to improve the anti-jamming capability. With regard to the widths of the different input pulses or the frequencies of the different pulses, the signal conversion device can be adapted by simply adjusting capacitance and resistance parameters in the circuit. The device provided by the invention is small in volume, low in cost and easy to implement; functions can be expanded; the signal conversion device is applicable to the field of large-range pulse width conversion.

Description

1. Technical field: [0001] The present invention relates to a simple ultrasonic detection encoder trigger signal generation device, which can be applied to the ultrasonic sound field scanning system, which needs encoder trigger signal to trigger data collection, but the system does not use encoder, but uses single-channel pulse trigger The case of a stepper motor. The same device is also suitable for other similar applications. 2. Background technology: [0002] Ultrasonic testing technology has become an important part of the field of nondestructive testing. The performance of ultrasonic transducers in ultrasonic testing systems directly affects the reliability and credibility of testing. With the improvement of the quality requirements of industrial products, there are higher requirements for the precision and accuracy of ultrasonic testing. The sound field characteristic of an ultrasonic transducer is a relatively important performance parameter. For a longitudinal wave...

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Problems solved by technology

[0003] However, ultrasonic phased array testing instruments used in conjunction with ultrasonic phased array transducers generally do not have a signal interface that receives a single pulse to trigger phased excitation and receive a single detection signal, and gives the phased array transducer sound field measurement data Simultaneous acquisition poses difficulties

Ultrasonic phased array detection instruments generally have an encoder signal interface to achieve the function of triggering detection at a specific position, but the encoder signal interface is two pulses, so it is necessary to develop a single pulse to two pulse signal conversion device to solve the problem. Data Synchronous Acquisition in Sound Field Measurement of Ultrasonic Phased Array Transducer

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