PSEUDO ROCK AND ANALYSIS SYSTEM USING THE SAME

• US 20130125662A1
• Filed: 08/05/2011
• Published: 05/23/2013
• Est. Priority Date: 08/05/2010
• Status: Active Grant

• Current Assignee: Akebono Brake Industry Company Limited (Akebono Brake Corporation)
• Original Assignee: Akebono Brake Industry Company Limited (Akebono Brake Corporation)
• Inventors: Kunimi, Takashi, Akutagawa, Shinichi
• Granted Patent: US 8,991,260 B2
• Time in Patent Office: Days
• US Class Current: 73/784
• CPC Class Codes: E21D 9/003 Arrangement of measuring or indicating devices for use during driving of tunnels, e.g. for guiding machines
• CPC Class Codes: G01N 33/24 Earth materials G01N33/42 takes precedence
• CPC Class Codes: G01V 1/01 Measuring or predicting earthquakes
• CPC Class Codes: G01V 1/166 Arrangements for coupling receivers to the ground

Abstract

A pseudo rock includes a housing, a strain sensor, a three-axis acceleration sensor, a vibration generator and a controller. The housing has an average shape and size of rocks. The strain sensor detects a stress acting in positive and negative directions of each axis with respect to three-dimensional coordinates using the center of the housing as the origin. The three-axis acceleration sensor detects acceleration acting in each axis of the three-dimensional coordinates. The vibration generator produces vibration in a specific direction with respect to the three-dimensional coordinates. The controller converts respective detected values of the strain sensor and the three-axis acceleration sensor into vibration pulses of specific patterns and outputting the vibration pulses to the vibration generator.

Claims

1. A pseudo rock, configured to be buried inside a mineral deposit or under ground, comprising:

a housing having an average shape and size of rocks existing inside the mineral deposit or the ground;

a strain sensor configured to detect a stress acting in positive and negative directions of each axis with respect to three-dimensional coordinates (X axis, Y axis, Z axis) using the center of the housing as the origin;

a three-axis acceleration sensor configured to detect acceleration acting in each axis of the three-dimensional coordinates;

a vibration generator configured to produce vibration in a specific direction with respect to the three-dimensional coordinates; and

a controller configured to convert respective detected values of the strain sensor and the three-axis acceleration sensor into vibration pulses of specific patterns and outputting the vibration pulses to the vibration generator.

2. The pseudo rock according to claim 1, wherein

an ID vibration pulse is individually allocated to the pseudo rock, and

the controller outputs the vibration pulses of the specific patterns corresponding to the detected values of the strain sensor and the three-axis acceleration sensor together with the ID vibration pulse to the vibration generator.

3. The pseudo rock according to claim 2, wherein

the controller includes power source controller configured to turn on an own power source when the three-axis acceleration sensor or a vibration sensor individually provided detects vibration of the ID vibration pulse.

4. The pseudo rock according to claim 1, further comprising:

a three-axis geomagnetic sensor.

5. A ground control apparatus on ground, configured to control a pseudo rock configured to be buried inside a mineral deposit or under ground, including:

a housing having an average shape and size of rocks existing inside the mineral deposit or the ground;

a strain sensor configured to detect a stress acting in positive and negative directions of each axis with respect to three-dimensional coordinates (X axis, Y axis, Z axis) using the center of the housing as the origin;

a three-axis acceleration sensor configured to detect acceleration acting in each axis of the three-dimensional coordinates;

a vibration generator configured to produce vibration in a specific direction with respect to the three-dimensional coordinates; and

a controller configured to convert respective detected values of the strain sensor and the three-axis acceleration sensor into vibration pulses of specific patterns and outputting the vibration pulses to the vibration generator, the ground control apparatus comprising;

a sending vibrator configured to send an ID vibration pulse of the pseudo rock to the pseudo rock to trigger the pseudo rock; and

a receiving sensor configured to detect vibration from a vibration generator of the pseudo rock.

6. The ground control apparatus according to claim 5, wherein

the receiving sensor detects a vibration pulse corresponding to detected values of the strain sensor and the three-axis acceleration sensor together with vibration corresponding to an ID vibration pulse of the pseudo rock from the pseudo rock, and

the ground control apparatus further comprises a data analyzer configured to analyze each of the detected values of the strain sensor and the three-axis acceleration sensor of the pseudo rock together with the ID vibration pulse of the pseudo rock.

7. The ground control apparatus according to claim 6, wherein

the receiving sensor is arranged in at least three places of an outer periphery of the mineral deposit or the ground, and

the ground control apparatus further comprises a position analyzer configured to analyze a three-dimensional position of the pseudo rock inside the mineral deposit or the ground based on a difference between arrival times of signals from a vibration generator of the pseudo rock.

8. The ground control apparatus according to claim 6, further comprising:

a three-dimensional coordinate analyzer configured to analyze an angle of inclination in a horizontal direction or an angle of inclination to a vertical direction of three-dimensional coordinates (X axis, Y axis, Z axis) of the pseudo rock based on a detected value of each of the strain sensors or the three-axis geomagnetic sensors of the pseudo rock.

9. A rock behavior analysis system, configured to analyze a rock inside of a mineral deposit or under ground, comprising:

a seudo rock, configured to be buried inside a mineral deposit or under ground, including;

a housing having an average shape and size of rocks existing inside the mineral deposit or the ground;

a strain sensor configured to detect a stress acting in positive and negative directions of each axis with respect to three-dimensional coordinates (X axis, Y axis, Z axis) using the center of the housing as the origin;

a three-axis acceleration sensor configured to detect acceleration acting in each axis of the three-dimensional coordinates;

a vibration generator configured to produce vibration in a specific direction with respect to the three-dimensional coordinates; and

a controller configured to convert respective detected values of the strain sensor and the three-axis acceleration sensor into vibration pulses of specific patterns and outputting the vibration pulses to the vibration generator; and

a ground control apparatus including;

a sending vibrator configured to send an ID vibration pulse of the pseudo rock to the pseudo rock to trigger the pseudo rock; and

a receiving sensor configured to detect vibration from the vibration generator of the pseudo rock.