Camera tracking movable transmitter apparatus

• US 4,905,315 A
• Filed: 06/30/1988
• Issued: 02/27/1990
• Est. Priority Date: 06/30/1988
• Status: Expired due to Fees

• Current Assignee: Camtrac Incorporated
• Original Assignee: Camtrac Incorporated
• Inventors: Miller, Howard A., Solari, Peter L., Spencer, Stanley G.
• Primary Examiner(s): Shoop, Jr., William M.
• Assistant Examiner(s): MARTIN, DAVID S
• Application Number:
  US07/213,896
• Time in Patent Office: 607 Days
• Field of Search: 318/560-561, 318/590-594, 318/638-640, 318/648, 318/649, 318/480, 342/385, 342/386, 342/458, 342/462, 342/465, 358/125, 354/82, 354/293, 352/44, 352/53, 352/243
• US Class Current: 318/640
• CPC Class Codes: G01S 3/786 the desired condition being maintained automatically
• CPC Class Codes: G01S 5/16 using electromagnetic waves other than radio waves

Abstract

Apparatus for mounting and positioning an associated device such as a camcorder which includes a transmitter for producing a control signal, a substantially fixed platform and a control apparatus including a plurality of sensors disposed in a plane at angularly spaced intervals about a first axis. Each of the plurality of sensors is constructed to receive a first control signal radiated by the transmitter. The apparatus also includes structure to discriminate which of the plurality of sensors is receiving the control signal from the transmitter and utilizes that information to drive the servomechanism.

Claims

1. Apparatus for mounting and positioning a camcorder which comprises:

a transmitter for producing a first control signal, said transmitter being dimensioned and configured for being carried on an object to be followed by the camcorder;

a mounting platform, said mounting platform being movable about horizontal and vertical axes;

means for carrying the associated camcorder, said means for carrying being disposed on said mounting platform;

a first control apparatus disposed on said platform including a first plurality of sensors disposed substantially in a first plane at angularly spaced intervals about a first axis, each of said first plurality of sensors being constructed to receive said first control signal radiated by said transmitter, said first

control signal being an infrared control signal having a beam width that normally extends to less than all of said first plurality of sensors at any given time;

means for discriminating which of said first plurality of sensors is receiving said first control signal from said transmitter;

a servomechanism supporting said platform and said means for carrying the associated camcorder; and

means for controlling said servomechanism to position the camcorder, said means for controlling producing a second control signal based on the location of one or more of said first plurality of sensors receiving said signal at any instant.

2. The apparatus as described in claim 1 wherein:

said sensors in said first plurality of sensors are disposed in an array in which an equal number of sensors are disposed on each side of a first median plane extending through said first axis.

3. The apparatus as described in claim 2 wherein:

said second control signal varies as a function of the angular displacement from said first median plane of said sensors in said first plurality of sensors that receive said first control signal.

4. The apparatus as described in claim 3 wherein:

said first median plane is generally vertical during normal operation of said apparatus for mounting and positioning a camcorder.

5. The apparatus as described in claim 4 further including:

a second control apparatus disposed on said platform including a second plurality of sensors disposed substantially in a second plane at angularly spaced intervals about a second axis, each of said second plurality of sensors being constructed to receive said first control signal radiated by said transmitter, said first control signal having a beam width that normally extends to less than all of said sensors in said second plurality of sensors;

means for discriminating which of said second plurality of sensors is receiving said first control signal from said transmitter at any given time; and

means for controlling said servomechanism to position the camcorder, said means for controlling producing a third control signal based on the location of one or more of said sensors receiving said first control signal at any given time.

6. The apparatus as described in claim 5 wherein:

said sensors in said second plurality of sensors are disposed in an array in which an equal number of sensors are disposed on each side of a second plane extending through said second axis.

7. The apparatus as described in claim 6 wherein:

said second control signal varies as a function of the angular displacement from said second median plane of said sensors in said second plurality of sensors receiving said first control signal at any given time.

8. The apparatus as described in claim 7 wherein:

said second median plane is generally horizontal during normal operation of said apparatus for mounting and positioning a camcorder.

9. Apparatus for mounting and positioning an associated camcorder which comprises:

a mobile transmitter producing a first control signal, said first control signal being an infrared signal;

a mounting platform;

a first control apparatus disposed on said platform including a first plurality of sensors disposed substantially in a first plane at angularly spaced intervals about a first axis, each of said first plurality of sensors being adapted to receive said first control signal from said transmitter, said first control signal having a beam width which normally does not extend over all of said first plurality of sensors at any given time;

first means for determining which of said first plurality of sensors is receiving said first control signal from said transmitter;

a servomechanism supporting said platform and the associated device; and

first means for controlling said servomechanism to position the camcorder, said first means for controlling producing a second control signal based on the location of one or more of said first plurality of sensors receiving said signal at any given time.

10. The apparatus as described in claim 9 wherein said:

first plurality of sensors are disposed in a first array whereby an equal number of said first plurality sensors are disposed on each side of a first median plane are disposed on each side of a first median plane extending through said first axis.

11. The apparatus as described in claim 10 wherein said:

second control signal varies as a function of the angular displacement of said transmitter from said median plane.

12. The apparatus as described in claim 11 wherein:

said first median plane is generally vertical during normal operation of said appartus for mounting and positioning.

13. The apparatus as described in claim 12 further including:

a second control apparatus disposed on said platform and including a second plurality of sensors disposed on said platform and including a second plurality of sensors disposed substantially in a second plane at angularly spaced intervals about a second axis, each of said second plurality of sensors being adapted to receive said first control signal radiated by said transmitter;

second means for determining which of said second plurality of sensors is receiving said first control signal from said transmitter;

second means for controlling said servomechanism to position the camcorder, said second means for controlling producing a third control signal based on the location of one or more of said second plurality of sensors receiving said first control signal at any given time.

14. The apparatus as described in claim 13 wherein:

said second plurality of sensors are disposed in a second array whereby an equal number of said second plurality of sensors are disposed on each side of a second median plane, said second median plane extending through said second axis.

15. The apparatus as described in claim 14 wherein:

said second control signal varies as a function of the angular displacement of said transmitter from said second median plane.

16. A method for controlling the location of a camcorder comprises the steps of:

providing a transmitter producing an infrared signal beam;

providing a rotational tracking device;

positioning a first plurality of sensors in a first plane for receiving said first signal beam;

positioning a second plurality of sensors in a second plane perpendicular to the first plane for receiving the infrared signal beam;

determining which of said sensors in said first plurality of sensors are receiving said infrared signal beam and using this determination to operate a first motor to orient said camcorder in one plane; and

determining which of said sensors in said second plane are receiving said infrared signal beam and using this determination to operate a second motor to orient said camcorder in another plane.

17. The method for controlling the location of a tracking device of claim 16 including:

the step of positioning said first plurality of sensors a uniform distance apart from each other in said first plane.

18. The method for controlling the location of a tracking device of claim 17 including:

the step of positioning said second plurality of sensors a uniform angular distance apart from each other in said second plane.