Surveillance camera system

• US 5,111,288 A
• Filed: 10/08/1991
• Issued: 05/05/1992
• Est. Priority Date: 03/02/1988
• Status: Expired due to Term

• Current Assignee: Honeywell International Inc.
• Original Assignee: Diamond Electronics Incorporated
• Inventors: Blackshear, David M.
• Primary Examiner(s): Kostak, Victor R.
• Application Number:
  US07/772,601
• Time in Patent Office: 210 Days
• Field of Search: 358/108, 358/209, 358/210, 358/229, 358/93, 358/125, 358/126, 354/81, 403/348, 403/349
• US Class Current: 348/143
• CPC Class Codes: G08B 13/19619 Details of casing
• CPC Class Codes: G08B 13/1963 Arrangements allowing camera rotation to change view, e.g. pivoting camera, pan-tilt and zoom [PTZ]
• CPC Class Codes: G08B 13/19632 Camera support structures, e.g. attachment means, poles
• CPC Class Codes: G08B 13/19689 Remote control of cameras, e.g. remote orientation or image zooming control for a PTZ camera

Abstract

A surveillance camera system comprises a spherical housing that has a partially transparent lower, hemispherically shaped gold coated dome with a geometric center. A camera mount is mounted in the housing for panning movements about a vertical pan axis and tilting movement about a horizontal tilt axis. A video camera is mounted to the camera mount and electric motors are mounted for panning and tilting the mount and camera. A computer and control circuit is mounted to the camera mount and coupled to actuate the electric motors to orient the camera and to actuate the camera zoom and focus as well as to enhance the camera'"'"'s video image with descriptive word captions. The computer is programmed for automatic or manual operation of the system. A rotary electric connector is mounted to the housing and connects the on board computer with a joystick and control unit for issuing instructions to the computer and connects the camera to an ancillary video display.

Claims

1. In a surveillance camera system of the type having a video camera mounted for orientational movement about pan and tilt axes and electrically connected to a video monitor, a method of controlling the orientation of the camera for automated surveillance with said method comprising the steps of:

(a) defining and storing at least two orientations of the camera within its surveillance area with each orientation comprising a pan position and a tilt position of the camera;

(b) defining and storing a descriptive word captain corresponding to each of the camera orientations defined in step (a);

(c) selecting one of the camera orientations defined in step (a);

(d) moving the camera about the pan axis in a direction toward the pan position of the selected camera orientation;

(e) moving the camera about the tilt axis in a direction toward the tilt position of the selected camera orientation;

(f) terminating camera movement when its pan and tilt position equals those of the selected camera orientation;

(g) enhancing the video signal from the camera with the descriptive word caption corresponding to the selected camera orientation and displaying the enhanced video image on the video monitor;

(h) dwelling a predetermined length of time; and

(i) go to step (c), and

wherein steps (c) through (i) are performed by a computerized control means mounted with the video camera.

2. The method of claim 1, wherein step (d) further comprises calculating the shortest pan arc from the present pan position of the camera to the pan position of the selected camera orientation and wherein the camera is moved toward the selected pan position along the arc thus calculated.

3. The method of claim 1 wherein the camera is moved about the pan and tilt axes at a rate of at least 75 degrees per second.

4. The method of claim 1 further comprising the steps of defining a camera zoom and focus setting corresponding to each orientation defined in step (a) and further including the step of adjusting the camera zoom and focus to equal the zoom and focus settings corresponding to the selected camera orientation as the camera moves to the selected orientation.

5. The method of claim 1 further comprising the steps of defining and storing a camera orientation and zoom and focus settings corresponding to an alarmed event and wherein following step (h), determining if the alarm has been actuated and, if so, moving the camera to the orientation corresponding to the event while adjusting the camera zoom and focus to the settings corresponding to the event.

6. The method of claim 1 wherein the computerized control means is addressable from a remote location through remote control means and wherein steps (a) and (b) are performed by an operator through said remote control means.

7. The method of claim 1 further comprising the step of enhancing the video signal from the camera as the camera is moved to a selected orientation with a message indicative that the camera is en route to the selected orientation.

8. The method of claim 1 wherein step (b) further includes defining and storing a desired pan and tilt traverse time corresponding to each of the camera orientations defined in step (a) and where in steps (d) and (e) the camera is moved at rates that will result in pan and tilt traverse times equal to those defined in step (b).

9. In a surveillance camera system of the type having a video camera mounted for orientational movement about pan and tilt axes by manual manipulations of a control joystick and being connected to a video monitor, a method of indicating camera orientations to an operator comprising the steps of:

(a) defining and storing at least one pan range and at least one tilt range with said ranges intersecting to define an orientational window within the camera'"'"'s surveillance area;

(b) assigning a descriptive word caption corresponding to the window defined in step (a);

(c) as the camera is moved within its surveillance area, comparing its pan and tilt position with the pan and tilt ranges defined in step (a); and

(d) if the camera'"'"'s pan and tilt position falls within the intersection of the ranges defined in step (a), enhancing the video signal from the camera with the descriptive word caption assigned in step (b).