A transient electromagnetic transmitting and control circuit

The transient electromagnetic emission and control circuit, composed of LS374 latch, TLP521-4 optocoupler, IR2110A driver chip and IGBT full-bridge topology, solves the problem of unsatisfactory emission current waveform, realizes rapid turn-off of emission current and high-quality waveform, and improves detection capability.

CN122345892APending Publication Date: 2026-07-07JILIN UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
JILIN UNIVERSITY
Filing Date
2026-06-08
Publication Date
2026-07-07

AI Technical Summary

Technical Problem

Existing transient electromagnetic transmitters have shortcomings in high-power transmission, waveform linearity in the constant current segment, and rapid current turn-off, which limits their detection capabilities. Moreover, the turn-off speed of the transmitted current has the greatest impact on the detection quality.

Method used

The system employs a control signal processing module with an LS374 latch and a 74LS07 buffer, an opto-isolation module with a TLP521-4 optocoupler, a power drive module with an IR2110A driver chip, a full-bridge power switch module with an IGBT full-bridge topology, and an energy-consuming quasi-resonant shaping module. Combined with a graded power supply design, it achieves stable control of the transmit current and rapid turn-off.

Benefits of technology

It improves the waveform quality of the transmitted current, reduces the interference of power switching noise on the control circuit, enhances the system's anti-interference capability and safety, and improves the detection resolution.

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Abstract

The application provides a transient electromagnetic transmitting and control circuit and relates to the field of transient electromagnetic transmitting systems.The application comprises a control signal processing module, an optoelectronic isolation module, a power driving module, a full-bridge power switch module, a transmitting coil, an energy-consuming quasi-resonant shaping module and a power supply part.A LS374 latch is used for stably latching the control signal, a 74LS07 buffer is used for outputting a control driving signal, a TLP521-4 optoelectronic coupler is used for isolating and transmitting the control driving signal to an IR2110A driving chip, the IR2110A driving chip drives an IGBT full-bridge topology composed of S1 to S4, and the transmitting coil forms a forward or reverse current.The energy-consuming quasi-resonant shaping module receives the electric energy in the transmitting coil and performs damping energy consumption when being turned off, so that the transmitting current is quickly turned off.
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