MULTI-JOINT UNDERWATER ROBOT HAVING COMPLEX MOVEMENT FUNCTIONS OF WALKING AND SWIMMING AND UNDERWATER EXPLORATION SYSTEM USING SAME

• US 20140343728A1
• Filed: 12/13/2012
• Published: 11/20/2014
• Est. Priority Date: 12/15/2011
• Status: Active Grant

• Current Assignee: Korea Institute Of Ocean Science & Technology
• Original Assignee: Korea Institute Of Ocean Science & Technology
• Inventors: Jun, Bong-Huan, Shim, Hyung-Won, Park, Jin-Yeong, Kim, Bang-Hyun, Baek, Hyuk, Lee, Pan-Mook
• Granted Patent: US 9,498,883 B2
• Time in Patent Office: Days
• US Class Current: 700/259
• CPC Class Codes: B25J 9/1602 characterised by the control system, structure, architecture
• CPC Class Codes: B62D 57/032 with alternately or sequentially lifted supporting base and legs; with alternately or sequentially lifted feet or skid B62D57/024 takes precedence
• CPC Class Codes: B63B 2221/22 by means that allow one or more degrees of angular freedom, e.g. hinges, articulations, pivots, universal joints, not otherwise provided for in this class
• CPC Class Codes: B63C 11/52 Tools specially adapted for working underwater, not otherwise provided for
• CPC Class Codes: B63G 8/08 Propulsion schnorkels B63G8/36; nuclear propulsion B63H21/18; submerged exhausting apparatus F01N13/12
• CPC Class Codes: B63G 8/14 Control of attitude or depth of torpedoes F42B19/00
• CPC Class Codes: B63H 1/36 swinging sideways, e.g. fishtail type
• CPC Class Codes: B63H 19/08 by direct engagement with water-bed or ground
• CPC Class Codes: Y10S 901/01 Mobile robot
• CPC Class Codes: Y10S 901/15 Jointed arm
• CPC Class Codes: Y10S 901/28 Joint
• CPC Class Codes: Y10S 901/46 Sensing device
• CPC Class Codes: Y10S 901/47 Optical

Abstract

Disclosed is an underwater exploration system using a multi-joint underwater robot having a novel complex movement concept in which the multi-joint underwater robot moves through walking or swimming with multi-joint legs closely to a seafloor, differently from a conventional underwater robot to obtain a thrust through a propeller scheme. The underwater exploration system includes the multi-joint underwater robot having the complex movement function according, a depressor, and a mother ship to store data of an underwater state transmitted from the multi-joint underwater robot and to monitor and control a movement direction of the multi-joint underwater robot. The depressor is connected to the mother ship through a primary cable, the multi-joint underwater robot is connected to the depressor through a second cable, and resistance force of the primary cable is applied to the depressor without being transmitted to the multi-joint underwater robot.

Claims

1. A multi-joint underwater robot having a complex movement function, the multi-joint underwater robot comprising:

a streamlined body;

multi-joint walking legs mounted at left and right sides and a front side of the body and having multiple joints;

a control unit mounted in the body to control a walking state and a swimming state through the multi-joint walking legs;

a walking leg driving unit controlled by the control unit and generating a driving signal to drive the multi-joint walking legs;

a sensing unit mounted in the body to sense a posture of the body and contact of the body with an external object;

a buoyancy sensing unit mounted in the body to sense buoyancy of the body; and

a communication unit to transceive wired and wireless signals with an external device.

2. The multi-joint underwater robot of claim 1, wherein an ultrasonic camera is mounted at a front surface of the body.

3. The multi-joint underwater robot of claim 1, wherein the sensing unit comprises a posture sensor and a motion measuring sensor.

4. The multi-joint underwater robot of claim 1, wherein the sensing unit comprises an underwater location tracking device.

5. The multi-joint underwater robot of claim 1, further comprising a photographing unit mounted at a front surface of the body to photograph an underwater image, wherein the photographing unit comprises an underwater camera having a pan/tilting function, and a lighting device.

6. The multi-joint underwater robot of claim 1, wherein the communication unit comprises an optical communication modem.

7. The multi-joint underwater robot of claim 1, wherein the communication unit is connected to a depressor through a secondary cable including an optical fiber and a power line.

8. The multi-joint underwater robot of claim 1, wherein the body includes a light-weight and high-strength complex fiber.

9. The multi-joint underwater robot of claim 1, wherein the sensing unit comprises a force/moment sensor mounted between the body and the legs of the multi-joint underwater robot and a landing force sensor mounted in an end portion of the leg.

10. The multi-joint underwater robot of claim 1, wherein the sensing unit comprises a moment sensor mounted at two front legs of the multi-joint underwater robot to sense landing of the front legs.

11. The multi-joint underwater robot of claim 1, wherein the walking leg driving unit comprises:

a motor driving part to generate a motor driving signal;

first to N^th electrical motors operated according to the motor driving signal of the motor driving part; and

first to N^th reducers operated according to the electrical motors and linked to the multi-joint walking legs and walking legs used as robot arms to transfer operations of the electrical motors, respectively.

12. The multi-joint underwater robot of claim 1, wherein the buoyancy sensing unit variably adjusts a weight of the multi-joint underwater robot in a range of −

10 kg to +10 kg, and two front legs among the multi-joint walking legs have grippers such that the front legs selectively have a robot arm function.

13. An underwater exploration system using a multi-joint underwater robot having a complex movement function, the underwater exploration system comprising:

the multi-joint underwater robot having the complex movement function according to claim 1;

a depressor; and

a mother ship to store data of an underwater state transmitted from the multi-joint underwater robot and to monitor and control a movement direction of the multi-joint underwater robot,

wherein the depressor is connected to the mother ship through a primary cable,

the multi-joint underwater robot is connected to the depressor through a second cable, and

resistance force of the primary cable is applied to the depressor without being transmitted to the multi-joint underwater robot.

14. The underwater exploration system of claim 13, wherein the multi-joint underwater robot comprises:

a first switching hub to switch a plurality of signals;

an optical fiber converter to convert a received signal into an optical signal;

a computer connected to the first switching hub to process input and output signals;

RS232, RS485, USB, and CAN devices connected to the computer;

a second switching hub having one terminal connected to the first switching hub and an opposite terminal connected to a plurality of network cameras;

a video encoder having one terminal connected to the first switching hub and an opposite terminal connected to a plurality of analog cameras;

a forward scanning sonar serving as a forward looking sonar, connected to the first switching hub, photographing an image through a forward scanning work, and transmitting the image; and

an ultrasonic camera connected to the first switching hub and photographing and transmitting a forward image.

15. The underwater exploration system of claim 13, wherein the depressor comprises:

a switching hub switching a plurality of signals;

an optical fiber converter connected to the switching hub to convert a signal, which is received through the switching hub, into an optical signal and to transmit the signal to the mother ship;

a computer processing input and output signals and having one terminal connected to an RS232 and an opposite terminal connected to the switching hub;

a video encoder having one terminal connected to a plurality of analog cameras and an opposite terminal connected to the switching hub; and

a plurality of network cameras connected to the switching hub.

16. The underwater exploration system of claim 13, wherein the mother ship comprises first and second optical fiber converters having one terminal connected to a plurality of computers and an opposite terminal to transmit an optical signal, and the first and second optical fiber converters are connected to an optical fiber converter of the multi-joint underwater converter and an optical fiber converter of the depressor, respectively.