A transient electromagnetic transmitting and control circuit
CN122345892BActive Publication Date: 2026-08-28JILIN UNIVERSITY
Patent Information
- Application Number
- CN202610813411.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2026-06-08
- Publication Date
- 2026-08-28
- Estimated Expiration
- 2046-06-08
AI Technical Summary
Technical Problem
[0003]目前瞬变电磁发射机在大功率发射、电流恒流段波形线性度和电流快速关断等方面的研究尚有不足，发射电路也不能产生理想的电流方波，理想的电流方波对地下目标体有更好的激发效果
Benefits of technology
[0013]本发明通过LS374锁存器的稳定锁存、TLP521-4光电耦合器的电气隔离以及IR2110A驱动芯片对IGBT全桥拓扑的驱动保护，形成数字隔离、驱动保护和功率保护相配合的保护结构，提高电路在瞬变电磁发射强电磁干扰环境下的可靠性。通过IGBT的高压大电流开关能力、快速恢复二极管的快速续流能力以及耗能型准谐振整型模块的关断整形作用，电路能够产生上升沿和下降沿较陡峭的脉冲，关断时间可控制在200ns以内，使发射电流脉冲波形质量得到提高，有利于提高瞬变电磁探测分辨率。
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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, a power consumption type 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 a first IGBT tube S1 to a fourth IGBT tube S4, and the transmitting coil forms a forward or reverse current.The power consumption type quasi-resonant shaping module is used for receiving the electric energy in the transmitting coil and damping and consuming the electric energy when being turned off, so that the transmitting current is quickly turned off.
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Citation Information
Patent Citations
Magnetotelluric denoising method and system
CN114239651A
Interpreting borehole transient electromagnetic data using two thin-sheet conductors
US20130066559A1