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The Auto-Gopher: A Wireline Rotary-Percussive Deep SamplerAccessing regions on planetary bodies that potentially preserved biosignatures or are presently habitable is vital to meeting NASA solar system "Search for Life" exploration objectives. To address these objectives, a wireline deep rotary-percussive corer called Auto-Gopher was developed. The percussive action provides effective material fracturing and the rotation provides effective cuttings removal. To increase the drill's penetration rate, the percussive and rotary motions are operated simultaneously. Initially, the corer was designed as a percussive mechanism for sampling ice and was demonstrated in 2005 in Antarctica reaching about 2 m deep. The lessons learned suggested the need to use a combination of rotation and hammering to maximize the penetration rate. This lesson was implemented into the Auto-Gopher-I deep drill which was demonstrated to reach 3-meter deep in gypsum. The average drilling power that was used has been in the range of 100-150 Watt, while the penetration rate was approximately 2.4 m/hr. Recently, a task has started with the goal to develop Auto-Gopher-II that is equipped to execute all the necessary functions in a single drilling unit. These functions also include core breaking, retention and ejection in addition drilling. In this manuscript, the Auto-Gopher-II, its predecessors and their capability are described and discussed.
Document ID
20170007093
Document Type
Conference Paper
External Source(s)
Authors
Bar-Cohen, Yoseph (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Zacny, Kris (Honeybee Robotics Pasadena, CA, United States)
Badescu, Mircea (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Lee, Hyeong Jae (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Sherrit, Stewart (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Bao, Xiaoqi (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Paulsen, Gale L. (Honeybee Robotics Pasadena, CA, United States)
Beegle, Luther (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
August 1, 2017
Publication Date
April 11, 2016
Subject Category
Lunar and Planetary Science and Exploration
Engineering (General)
Meeting Information
ASCE Earth and Space Conference 2016(Orlando, FL)
Distribution Limits
Public
Copyright
Other
Keywords
drilling
sample acquisition
sampling
coring