Three-component airborne transient electromagnetic detection system and method with UAV

A three-component airborne transient electromagnetic detection system with a UAV, comprising an airborne detection system and a ground assistance system, wherein the airborne detection system comprises:

• the UAV;
• a receiving device comprising a three-component magnetic sensor and a receiving sub-device, wherein the three-component magnetic sensor is configured to acquire three-component electromagnetic data, and wherein the receiving sub-device comprises:
• a first acquisition circuit configured to acquire the three-component electromagnetic data from the three-component magnetic sensor;
• a second acquisition circuit configured to acquire a transmitting current signal;
• a receiving master control circuit comprising a controller;
• and a transmission circuit configured to transmit the three-component electromagnetic data and the transmitting current signal;
• wherein the first acquisition circuit and the second acquisition circuit comprise data sampling circuits of an analog-to-digital converter, and wherein the transmission circuit is configured to transmit the three-component electromagnetic data and the transmitting current signal to the ground assistance system;
• a transmitting device comprising a transmitting coil, a bucking coil, and a transmitting sub-device, wherein the bucking coil is disposed on an inner side of the transmitting coil, and a coil winding direction of the transmitting coil and a coil winding direction of the bucking coil cause a current direction flowing through the transmitting coil to be opposite to a current direction flowing through the bucking coil, so as to reduce an electromagnetic interference of the transmitting device to the receiving device, wherein the transmitting sub-device comprises;
• a detection circuit configured to detect a waveform of the transmitting current signal, wherein the transmitting current signal is a current pulse signal;
• a transmitting master control circuit comprising a controller;
• a synchronous circuit configured to synchronize an instruction of the transmitting device and an instruction of the receiving device;
• and a constant-voltage double-clamp circuit configured to simultaneously clamp a rising edge and a falling edge of the transmitting current signal to reduce a turn-off time of a circuit;
• a connecting device comprising a signal and rope composite cable, wherein the connecting device is configured to connect the UAV, the transmitting device, and the receiving device;
• wherein the rising edge represents a time period during which the current signal rises from zero to a preset current, the falling edge represents a time period during which the current signal drops from the preset current to zero, the clamp represents that a voltage of the current signal is limited to a first-preset voltage, and the turn-off time represents a duration information of the falling edge.