Signal source controllable giant magnetostrictive transducer driving power supply

Abstract

The invention relates to a signal-source-controllable giant magnetostrictive transducer drive power supply. The signal-source-controllable giant magnetostrictive transducer drive power supply comprises a high-power transformer, a signal generating module, a direct-current power supply module, a pre-amplification circuit, a power amplification circuit and a giant magnetostrictive transducer, wherein the input end of the high-power transformer is directly connected with a power grid, and the output end of the high-power transformer is connected with the input end of the direct-current power supply module. The signal-source-controllable giant magnetostrictive transducer drive power supply has the advantages that the direct digital frequency synthesizing technology and the computer control technology are used to design a signal generating module, and the control circuit of the signal generating module is compact in structure; once a control method is changed, only a program needs to be modified, the hardware circuit needs not to be changed, and the program is convenient to download; a chirp signal output function is added on the basis of dot frequency signal output, and a chirp signal is a signal whose frequency gradually changes along with time.

Description

technical field [0001] The invention relates to a driving power supply for a transducer, more precisely, a driving power supply for a giant magnetostrictive transducer with a controllable signal source. Background technique [0002] Giant magnetostrictive transducers have broad application prospects due to their advantages of large power, high energy conversion rate, short response time, and no overheating failure. However, the relatively slow development of the corresponding intelligent drive system restricts its application. . [0003] At present, there are mainly two types of driving power supplies for giant magnetostrictive transducers: one is switching power supply, which consists of a second-order discharge circuit consisting of capacitors, resistors and loads. When the discharge current reaches the maximum, the switching tube is turned off to generate current pulses. To drive the super transducer, limited by the switching speed of the switching tube, the frequency of...

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Problems solved by technology

[0002] Giant magnetostrictive transducers have broad application prospects due to their advantages of large power, high energy conversion rate, short response time, and no overheating failure. However, the relatively slow development of the corresponding intelligent drive system restricts its application.

[0003] At present, there are mainly two types of driving power supplies for giant magnetostrictive transducers: one is switching power supply, which consists of a second-order discharge circuit consisting of capacitors, resistors and loads. When the discharge current reaches the maximum, the switching tube is turned off to generate current pulses. To drive the super transducer, limited by the switching speed of the switching tube, the frequency of the power supply is generally below 20KHz, and the signal source cannot be adjusted according to the demand; the second type is the inverter power supply, which uses analog control technology, because it uses a large number of Scattered components and circuit boards lead to a decrease in the reliability of the system, the output signal is in a single form, and only ordinary single-frequency signals can be output, and the power utilization rate of the power supply is low, and the output power is insufficient

[0004] In Zhao Xiangmo and Song Huansheng's patent "Giant Magnetostrictive Rare Earth Transducer Driving Power" (CN2914478), the driving power uses a switching tube circuit, the power frequency is low, and the signal source is uncontrollable; Zhang Bo's patent "Sonic Logging Transducer In "Transducer Drive System" (CN102889079A), the analog control technology is used to control the D / A converter to generate a low-voltage analog waveform, and then the power is amplified for the signal, and then the transducer is driven. The signal source control method is complicated. It is necessary to change the program, and the operation is inconvenient; Liu Na and Yu Haibo used the method of phase detection and frequency tracking to improve the energy conversion rate of the transducer in the patent "A Driving Power Supply for Ultrasonic Transducers" (CN104516290A), and at the same time, the system stability Once the control method is changed, the hardware circuit must also be changed; Xu Zhigang used a digital inverter power supply in his patent "A Rare Earth Giant Magnetostrictive Transducer Driving Power Supply" (CN202004661U), the hardware circuit is complex, and the power output Insufficient power, single signal output form

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