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Aftershock energy control-based method for reducing working blind areas of ultrasonic energy transducer

A technology of working blind area and aftershock energy, applied in the direction of sound wave re-radiation, instruments, measuring devices, etc., can solve problems such as measurement inconvenience, achieve the effect of accelerating consumption, increasing oscillation frequency, and improving inductance and capacitance parameters

Inactive Publication Date: 2012-10-24
ZHEJIANG UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

This method will cause great inconvenience for the flow or object position measurement of some closed pipes or containers

Method used

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  • Aftershock energy control-based method for reducing working blind areas of ultrasonic energy transducer
  • Aftershock energy control-based method for reducing working blind areas of ultrasonic energy transducer
  • Aftershock energy control-based method for reducing working blind areas of ultrasonic energy transducer

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Embodiment Construction

[0019] The specific implementation manner of the present invention will be described in detail below in conjunction with the accompanying drawings and examples.

[0020] The schematic diagram of the working blind area of ​​the ultrasonic transducer is as follows: figure 1 shown. The frequency of the ultrasonic excitation pulse signal 1 is the same as the resonance frequency of the ultrasonic transducer. Therefore, after the ultrasonic excitation pulse signal 1 enters the ultrasonic transducer, it can cause the ultrasonic transducer to resonate and excite the ultrasonic excitation signal. However, when the ultrasonic excitation pulse signal 1 disappears, due to the residual energy during excitation, the energy conversion element inside the ultrasonic transducer will continue to vibrate due to mechanical inertia and electrical inertia (free decay oscillation), resulting in aftershock signal 2. It can be seen from the aftershock signal amplitude envelope 3 that the vibration of...

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Abstract

The invention discloses an aftershock energy control-based method for reducing working blind areas of an ultrasonic energy transducer. The ultrasonic energy transducer can be equivalent to an inductance-resistance-capacitance oscillating circuit, a method that inductance-capacitance devices are connected in series with, in parallel with or in series and parallel with two ends of the ultrasonic energy transducer is adopted to be capable of improving the inductance-capacitance parameters of a working circuit of the ultrasonic energy transducer, thus being capable of improving the freely-degenerative oscillating frequency of the ultrasonic energy transducer, realizing accelerated consumption of the aftershock energy, and reducing the working blind areas of the ultrasonic energy transducer. The method can realize control on the consumption speed of the aftershock energy of the ultrasonic energy transducer, reduce the working blind areas of the ultrasonic energy transducer, and broaden the measurable acoustic path range of ultrasonic wave applied in detection on flow rate or objection detection.

Description

technical field [0001] The invention relates to a method for reducing the working blind area of ​​an ultrasonic transducer, in particular to a method for reducing the working blind area of ​​the ultrasonic transducer based on aftershock energy control. Background technique [0002] With the rapid development of electronic technology, ultrasonic measurement technology has been widely used in various fields such as industry and medicine. Among them, the use of ultrasound to measure flow and object position has the advantages of high measurement accuracy, wide range, and good reliability, and has been widely recognized in the field of industrial automation. When using ultrasonic waves to measure flow and object position, use electric pulses to excite the ultrasonic transducer to make it emit ultrasonic excitation signals. The ultrasonic signals propagate in the medium and are reflected back to the transducer when encountering different medium interfaces (such as the interface b...

Claims

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Application Information

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IPC IPC(8): G01F1/66G01S15/06G01S7/52
Inventor 傅新胡亮毛凯
Owner ZHEJIANG UNIV
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