Method of surveillance camera by using rotary electric machine

• US 20040041909A1
• Filed: 08/29/2003
• Published: 03/04/2004
• Est. Priority Date: 09/02/2002
• Status: Active Grant

• Current Assignee: Japan Servo Co., Ltd. (Nidec Corporation)
• Original Assignee: Japan Servo Co., Ltd. (Nidec Corporation)
• Inventors: Sakamoto, Masafumi, Horie, Noboru
• Granted Patent: US 7,274,805 B2
• Time in Patent Office: Days
• US Class Current: 348/143
• CPC Class Codes: H04N 7/181 for receiving images from a plurality of remote sources
• CPC Class Codes: H04N 7/185 from a mobile camera, e.g. for remote control
• CPC Class Codes: Y10T 74/17 Rotary driven device adjustable during operation relative to its supporting structure
• CPC Class Codes: Y10T 74/19 Gearing

Abstract

There is no surveillance camera system optimum for monitoring an important monitor place by a surveillance camera mainly for crime prevention day and night without humans in attendance, which can automatically monitor the place without humans in attendance and, when something suspicious is found, follow the suspicious without humans in attendance, and accurately monitor the suspicious at high precision. The present invention provides a surveillance camera driving method achieving such a system having the function of obtaining video image signals by two or more surveillance cameras each having a three-dimensional positioning pan tilt head function, organically processing the video information, comparing the processed information with input data of a plane picture or the like or data of pictures of a front view and a side view or the like, and determining whether the processed video signal is the same as the input data or not.

Claims

1. A method of driving a surveillance camera using a rotary electric machine for horizontally rotating (panning) the camera, wherein the rotary electric machine has a hollow in the center of its rotary shaft and, further, has a reduction gear having either a hollow in its center which is concentric with the rotary shaft or a hollow output shaft at least in its output part in the case of decelerating a rotation output of the rotary electric machine, a slip ring is concentrically provided in the hollow including the hollow output shaft of the reduction gear or a side face of the hollow output shaft, power or an electric signal is passed between a stationary side and a movable side, and camera video signals of the same place are compared with each other a plurality of times or a subtraction is executed between the (n−

1)th video signal and the n-th video signal (n;

an integer of 2 or larger) by using a surveillance camera driving method capable of performing three-dimensional positioning, thereby enabling a deviation in video images to be recognized.

2. The method of driving a surveillance camera using a rotary electric machine according to claim 1, wherein the camera is directed toward the position where a deviation occurs in video images by a panning motor and a tilting motor, and the video signal is obtained.

3. The method of driving a surveillance camera using a rotary electric machine according to claim 1, wherein even when the position where a deviation occurs in video images changes momentarily, position information is given to a panning motor and a tilting motor in accordance with the position where the deviation occurs of the camera video signal, the camera is continuously directed toward the place where the deviation occurs, and the video signal is continuously obtained.

4. The method of driving a surveillance camera using a rotary electric machine according to any of claims 1 to 3, further comprising the function of giving an alarm to a surveillant when the deviation is equal to or larger than a reference value.

5. The method of driving a surveillance camera using a rotary electric machine according to any of claims 1 to 3, further comprising a signal output function of giving a sound alarm to the place where the deviation occurs or turning on light when the deviation is equal to or larger than the reference value.

6. A method of driving a surveillance camera using a rotary electric machine, wherein the rotary electric machine for horizontally rotating (panning) a camera has a hollow in the center of its rotary shaft and, further, has a reduction gear having either a hollow in its center which is concentric with the rotary shaft or a hollow output shaft at least in its output part in the case of reducting a rotation output of the rotary electric machine, a slip ring is concentrically provided in the hollow including the hollow output shaft of the reduction gear or a side face of the hollow output shaft, power or an electric signal is passed between a stationary side and a movable side, the face or the like of a moving person or animal is followed for predetermined time to obtain video images of the face, and the video image is compared with a video image of a wanted person or animal to thereby make identification by using a surveillance camera driving method capable of performing three-dimensional positioning.

7. A surveillance camera driving method having a function of obtaining video image signals by two or more surveillance cameras each having a three-dimensional positioning panhead function, organically processing the video information, and comparing the processed information with input data of a picture of a plan view or the like or data of pictures of a full face and a profile, thereby determining whether the processed information is the same as the input information or not.