Seismic data acquisition device and seismic data acquisition method

A seismic data acquisition device, comprising:

• an anti-aliasing filter having (i) an input configured to receive analog seismic data and (ii) an output,
• a first conversion circuit having (i) an input connected to the output of the anti-aliasing filter and (ii) an output,
• a second conversion circuit having (i) an input connected to the output of the anti-aliasing filter and (ii) an output, and
• a controller having (i) a first input connected to the output of the first conversion circuit and (ii) a second input connected to the output of the second conversion circuit,
• wherein:
• the anti-aliasing filter is configured to filter the seismic data and output an input signal;
• the first conversion circuit is configured to convert the input signal to a first digital conversion signal when the input signal has a first voltage with an absolute value less than or equal to a voltage threshold, wherein the first digital conversion signal has a first resolution not less than a specified resolution;
• the second conversion circuit is configured to convert the input signal to a second digital conversion signal based on voltage-frequency conversion and frequency counting when the input signal has a second voltage with an absolute value greater than the voltage threshold, wherein the second digital conversion signal has a second resolution not less than the specified resolution;
• and
• the controller is configured to fit the first conversion signal and the second conversion signal and output an acquisition result of the seismic data.