Adjustable control station with movable monitors and cameras for viewing systems in robotics and teleoperations

• US 5,331,413 A
• Filed: 09/28/1992
• Issued: 07/19/1994
• Est. Priority Date: 09/28/1992
• Status: Expired due to Fees

• Current Assignee: United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration
• Original Assignee: United States Administrator of National Aeronautics and Space Administration
• Inventors: Diner, Daniel B.
• Primary Examiner(s): Chin, Tommy P.
• Assistant Examiner(s): LIN, BRYAN T
• Application Number:
  US07/954,109
• Time in Patent Office: 659 Days
• Field of Search: 358/87, 358/101, 358/103, 358/108, 358/210, 358/229, 358/254, 358/93, 901/47, 395/94
• US Class Current: 348/159
• CPC Class Codes: H04N 7/181 for receiving images from a plurality of remote sources

Abstract

Real-time video presentations are provided in the field of operator-supervised automation and teleoperation, particularly in control stations having movable cameras for optimal viewing of a region of interest in robotics and teleoperations for performing different types of tasks. Movable monitors to match the corresponding camera orientations (pan, tilt and roll) are provided in order to match the coordinate systems of all the monitors to the operator internal coordinate system. Automated control of the arrangement of cameras and monitors, and of the configuration of system parameters, is provided for optimal viewing and performance of each type of task for each operator since operators have different individual characteristics. The optimal viewing arrangement and system parameter configuration is determined and stored for each operator in performing each of many types of tasks in order to aid the automation of setting up optimal arrangements and configurations for successive tasks in real time. Factors in determining what is optimal include the operator'"'"'s ability to use hand-controllers for each type of task. Robot joint locations, forces and torques are used, as well as the operator'"'"'s identity, to identify the current type of task being performed in order to call up a stored optimal viewing arrangement and system parameter configuration.

Claims

1. In a real-time video presentation system for robotics and teleoperation using a hand-controller, said system having movable television cameras for optimal viewing of a region of interest surrounding a robot and movable monitors in a control station remote from said robot for presentation of television images from said cameras, a method of rotating each of said monitors to match the orientation of its corresponding television camera by matching its corresponding camera orientation in pan, tilt and roll, thereby causing an angle between a straight ahead direction of said robot and a straight ahead line of view of said corresponding camera to equal an angle between said hand-controller straight ahead direction and a line between the center of the image on a monitor of said corresponding camera and an observer'"'"'s point of view.

2. A system as defined in claim 1 including a method of relocating each of said movable monitors with respect to an operator to enable said operator to view the center of each monitor'"'"'s screen perpendicularly, thus enabling said operator to view each of said television images in a direction corresponding to the viewing angle of a corresponding one of said television cameras providing said television image, and thereby matching all rotational coordinates of all cameras and monitor images.

3. In a real-time video presentation system as defined in claim 2, further comprising a robot in said region of interest and a hand controller in a workstation for control of said robot, a method of mounting said hand controller in a fixed position, and transforming coordinates of said hand controller to correspond with coordinates of a camera located directly behind said robot in said region of interest providing one of said television images to a monitor located directly in front of said operator, whereby pushing said hand controller straight ahead by said operator at said control station moves said robot directly away from said camera providing one of said television images to said monitor.

4. In a real-time video presentation system as defined in claim 2, further comprising a robot in said region of interest and a hand controller in a workstation for control of said robot, a method of fixing said hand controller relative to a rotating position of said operator, transforming coordinates of said hand controller to match coordinates of all said monitor images, wherein said operator rotates in position a finite angle, and rotating said coordinates of said hand controller through said finite angle, thereby to maintain a match between coordinates of said hand controller and coordinates of said monitor images.

5. A method as defined in claim 4 wherein visual-kinesthetic error of said operator is corrected by said hand controller and correction is effected by mismatching coordinates otherwise matched to coordinates of said monitor images.

6. A method as defined in claim 5 further comprising a method of graphically displaying an extent to which said coordinates do not match due to correction effected by mismatching coordinates otherwise matched to coordinates of said monitor images.

7. A method as defined in claim 2 further comprising a method to avoid obscuring the view of one monitor from said operator by another monitor, said method comprising shifting and rotating both said one monitor and said other monitor so that all of each monitor can be viewed perpendicularly by said operator.

8. In a real-time video presentation system as defined in claim 2, further comprising a robot in said region of interest and a hand controller in said workstation, a method of transforming coordinates of said hand controller to mismatch coordinates of said monitor images, whereby pushing said hand controller straight ahead by said operator in said control station moves said robot directly away from a selected camera providing a television image to a monitor selected by said operator for viewing, for example, for special situations, such as high precision or difficult work.

9. A method as defined in claim 8 further comprising a method of graphically displaying an extent to which said coordinates do not match due to correction effected by mismatch of coordinates otherwise matched to coordinates of said monitor images.