Accelerating device of rising edge and falling edge of current pulse and accelerating method thereof

Abstract

The invention relates to an accelerating device of a rising edge and a falling edge of a current pulse and an accelerating method thereof. The accelerating device is characterized in that: an anode of a controllable direct current source is connected with a voltage stabilization clamping circuit, a bipolar current pulser and an anode of an earth load through a switch K; a cathode of the controllable direct current source is connected with a cathode of the earth load through the bipolar current pulser; and a pulse control circuit is connected with the bipolar current pulser; therefore, the accelerating device is formed. Beneficial effects of the invention are as follows: first, the voltage stabilization clamping circuit can generate high voltages in a bootstrapped mode on a capacitor C of a clamping voltage source, and then a rising edge and a falling edge of a current pulse are accelerated by using the high voltages of the capacitor C; therefore, there is no need to improve a direct current source voltage or provide an auxiliary power source; second, the output of the controllable direct current source is connected with the bipolar current pulser through an inductor Li of the voltage stabilization clamping circuit and the inductor Li plays a role in current stabilization of a forward peak value segment and a negative peak value segment of a current pulse Io (t), so that the forward peak value segment and the negative peak value segment of the current pulse Io (t) are smooth.

Description

Technical field: [0001] The invention relates to an electrical geophysical prospecting instrument, in particular to an acceleration device and an acceleration method for a current pulse rising edge and falling edge of a load with a load resistance value of several tens of Ω and an inductance value of several mH. Background technique: [0002] For the controllable source audio frequency magnetotelluric method (CSAMT), since the distance between the transmitter and the receiver is 5-10km, in order to make the signal-to-noise ratio of the signal collected by the receiver high, it is necessary for the transmitter to provide the ground load with the highest possible signal-to-noise ratio. Emission current; for the induced polarization method (IP), in order to obtain the polarizability of the earth more accurately, the rising and falling edges of the current pulse generated by the transmitter need to be as short as possible, and the positive peak and negative Be as smooth as possi...

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