2results about How to "Increase sampling depth" patented technology

This invention discloses a switched-capacitor circuit based on charge transfer. The sampling control terminal of the sampling clock generation circuit is electrically connected to the sampling switch control terminal of the sampling switched-capacitor array. The control terminal of the transfer drive array is connected to the drive control circuit, which controls the on / off state of each switch in the transfer drive array. The output terminal of the transfer drive array is electrically connected to the storage switched-capacitor array. Continuous cyclic sampling is performed through the sampling clock generation circuit and the sampling switched-capacitor array, and the cyclically sampled voltage values ​​are transferred to the storage switched-capacitor array through the transfer drive array. The output terminal of the storage switched-capacitor array is electrically connected to the quantization circuit. The quantization readout control circuit receives the readout data from the quantization circuit and outputs the data serially to an external device. This circuit can circumvent the contradiction between sampling depth and analog bandwidth, significantly improve the bandwidth of the analog bus, and increase the sampling depth of the switched-capacitor array.

The invention relates to the technical field of geotechnical engineering detection and geological exploration, in particular to a bottom mud columnar sampler operation control test system and method, and the method comprises the steps: collecting operation state feedback data, and recognizing the current operation stage and resistance state of a sampler; when it is recognized that the sampler is in the extraction stage and the cable traction tension exceeds a preset tension threshold value, frequency conversion excitation control logic is triggered; identifying a resonant frequency point of the current pipe wall and an external medium system; generating a vibration control instruction to reduce the friction resistance of the interface; the change rate of the environment pressure outside the pipe is monitored in real time; generating a pneumatic compensation instruction, adjusting the pressure of the cavity in the tube, and maintaining the difference value between the pressure of the environment outside the tube and the pressure of the cavity in the tube to be within a preset allowable error range of the sample maintaining pressure difference; according to the invention, sample slippage or bedding damage caused by pressure imbalance is effectively avoided, and the integrity of the columnar sample is guaranteed.