A drill apparatus measuring a pressure variable induction method sediment thickness

The present invention relates to a variable bit means for measuring pressure sensing method sediment thickness, including overlying plate, overlying the upper plate provided with a plurality of vertical protection frame, propulsion is provided with a pressure plate and an overlying holder means is perpendicular to the transmission sensing propulsion device, propulsion means is provided with a fixing base and the overlying plate perpendicular propulsion pressure sensing means sensing the pressure propulsion device and the control terminal is connected to the pressure sensing means said pusher bar toward the overlying plate, the push rod and the overlying plate is provided between the cleaning motor connected to the control terminal; a drill bit provided with a cleaning machine cleaning, sweeping the bit through said overlying plate. In operation, the stationary plate overlying sediment on the surface, to start the cleaning the motor, the restart pressure sensing propulsion means, under the action of the device, down to the vertical movement motor propulsion hole bottom pressure sensing, a pressure sensor in real time ( artificial calibration) reaches a certain value, the pressure sensing propulsion device is stopped, the push rod forward from the sediment is the thickness.