EP0525482A2
Expired / Lapsed
EP
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Surveillance apparatus with enhanced control of camera and lens assembly
Assignee: Sensormatic Electronics Corp
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Filing: 1992-07-11
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Granted: —
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Expires: 2012-07-11
Abstract
Abstract A surveillance device having a camera and lens assembly in which a condition of the assembly is controllable by a movable part and in which a closed loop digital motion control system is used to control the movable part and, therefore, the condition.
Inventors
- 👤 Robert Paff
- 👤 Carl Kupersmit
- 👤 Larry Mills
- 👤 Edwin Thompson
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 16:26
CPC Classifications
G; G08; G08B; G08B13/00; G08B13/18; G08B13/189; G08B13/194; G08B13/196; G08B13/19617; G08B13/19619; G08B13/1963; H; H04; H04N; H04N23/00; H04N23/50; H04N23/60; H04N23/66; H04N23/661; H04N23/695; H04N23/95; H04N23/958; H04N23/959; H04N7/00; H04N7/18; H04N7/181
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
60 words
Apparatus comprising: camera and lens assembly means for use in a CCTV system, said assembly means being movable at least in part to control at least one condition of said assembly means; and a closed loop digital motion control means responsive to the state of said movable part for controlling said movable part so as to control said one condition.
Claim 2
Dependent Claim
60 words
Apparatus comprising: camera and lens assembly means for use in a CCTV system, said assembly means being movable at least in part to control at least one condition of said assembly means; and a closed loop digital motion control means responsive to the state of said movable part for controlling said movable part so as to control said one condition.
Claim 3
Dependent Claim
41 words
Apparatus in accordance with claim 1 further comprising: a housing for supporting said assembly means so as to permit movement of at least said movable part; and a dome like-member removably attachable to said housing so as to enclose said assembly.
Claim 4
Dependent Claim
19 words
Apparatus in accordance with claim 2 wherein: said dome like member is a part of a sphere in shape.
Claim 5
Dependent Claim
26 words
Apparatus in accordance with claim 1 wherein: said closed loop digital motion control means generates a pulse width modulation (PWM) signal for controlling said movable part.
Claim 6
Dependent Claim
47 words
Apparatus in accordance with claim 4 wherein: said closed loop digital motion control means senses the state of said movable part and said closed loop digital motion control means compares said detected state of said movable part with a desired state to develop said PWM control signal.
Claim 7
Dependent Claim
28 words
Apparatus in accordance with claim 5 wherein: said movable part includes a motor for moving said movable part; and said PWM control signal is applied to said motor.
Claim 8
Dependent Claim
25 words
Apparatus in accordance with claim 6 wherein: said closed loop digital motion control means monitors said motor to sense the state of said one condition.
Claim 9
Dependent Claim
39 words
Apparatus in accordance with claim 1 wherein: said control of said movable part by said closed loop digital motion control means includes the ability to vary the speed of movement of said movable part over a range of speeds.
Claim 10
Dependent Claim
60 words
Apparatus in accordance with claim 8 wherein: said movable part is to be moved from a first position to a second position; and the variation of the speed of said movable part effected by said closed loop digital motion control means in controlling the movable part in moving from said first to second positions follows a preselected speed profile characteristic.
Claim 11
Dependent Claim
49 words
Apparatus in accordance with claim 9 wherein: said speed profile characteristic provides relatively smooth increase in speed for said movable part from said first position to a maximum speed and a relatively smooth decrease in speed from said maximum speed to bring said movable part to said second position.
Claim 12
Dependent Claim
25 words
Apparatus in accordance with claim 10 wherein: said speed profile characteristic further provides maintaining said maximum speed for a preselected time before decreasing said speed.
Claim 13
Dependent Claim
15 words
Apparatus in accordance with claim 10 wherein: said first and second positions are rest positions.
Claim 14
Dependent Claim
33 words
Apparatus in accordance with claim 8 wherein: said control of said movable part by said closed loop digital motion control means further includes the ability to provide preselected accelerations of said movable part.
Claim 15
Dependent Claim
69 words
Apparatus in accordance with claim 1 wherein: said movable part has end stop positions related to the end-of-travel positions of said movable part; said closed loop digital motion control means stores said end stop positions in a memory and utilizes said stored end stop positions during control of said movable part to stop the movement of said movable part by the time said movable part reaches said end-of-travel positions.
Claim 16
Dependent Claim
90 words
Apparatus in accordance with claim 1 wherein: said lens and camera assembly means define a view axis along which an image can be viewed and a zoom condition which is determinative of the size of the image and extent of the field of view to be viewed; said condition controlled by movement of said movable part is the direction of said view axis; and said closed loop digital motion control means is responsive to said zoom condition when controlling said movable part to control the direction of said view axis.
Claim 17
Dependent Claim
53 words
Apparatus in accordance with claim 15 wherein: said closed loop digital motion control means controls the speed of said movable part such that for zoom conditions indicative of images of increased size and field of views of lesser extent said closed loop digital motion control system selects decreased speeds for said movable part.
Claim 18
Dependent Claim
125 words
Apparatus in accordance with claim 1 wherein: said camera and lens assembly define a view axis for viewing an image, a focus condition indicative of the degree to which said image is in-focus in said camera and lens assembly, a zoom condition indicative of the size of the image and the extent of the field of view of said camera and lens assembly and an iris condition indicative of the level of light received in said camera and lens assembly, said condition controlled by said movable part is the focus condition of said camera and lens assembly, and said closed looped digital motion control means is responsive to said zoom condition and said iris condition in controlling said movable part to control said focus condition.
Claim 19
Dependent Claim
46 words
Apparatus in accordance with claim 17 wherein: said closed loop digital motion control means controls said movable part to have slower speeds for iris conditions indicative of lower light levels and zoom conditions indicative of images of larger size and fields of view of lesser extent.
Claim 20
Dependent Claim
49 words
Apparatus in accordance with claim 18 wherein: when said focus condition is indicative of a relatively large deviation from a desired focus condition, said closed loop digital motion control means controls the speed of said movable part to be initially at said slower speeds and then at increased speeds.
Claim 21
Dependent Claim
53 words
Apparatus in accordance with claim 1 wherein: said closed loop digital motion control means includes memory means for storing program means for controlling said closed loop digital motion control means and means responsive to means remote from said apparatus for receiving program means from said remote means for storing in said memory means.
Claim 22
Dependent Claim
19 words
Apparatus in accordance with claim 20 wherein: said memory means comprises one of an EEPROM and a non-volatile RAM.
Claim 23
Dependent Claim
23 words
Apparatus in accordance with claim 1 wherein: said condition is one of the pan, tilt, focus, iris and zoom conditions of said assembly.
Claim 24
Dependent Claim
57 words
Apparatus in accordance with claim 1 wherein: said assembly includes a movable part for controlling each of pan, tilt, zoom, focus and iris conditions of said assembly; and said closed loop digital motion control means is responsive to the state of each of said movable parts for controlling said movable parts so as to control said conditions
Claim 25
Dependent Claim
29 words
Apparatus in accordance with claim 23 wherein: said closed loop digital motion control means includes a closed loop digital motion control system for controlling each of said movable parts.
Claim 26
Dependent Claim
20 words
Apparatus in accordance with claim 24 wherein: said closed loop digital motion control system shares one or more common components.
Claim 27
Dependent Claim
27 words
Apparatus in accordance with claim 1 wherein: said closed loop digital motion control means includes a central processing unit for receiving commands from a remote operator means.
Claim 28
Dependent Claim
20 words
Apparatus in accordance with claim 26 further comprising: a remote operator means for transmitting commands to said central processing unit.
Claim 29
Dependent Claim
30 words
Apparatus in accordance with claim 27 wherein: said closed loop digital control means further comprises a digital processing means responsive to said central control unit for controlling said movable part.
Claim 30
Dependent Claim
51 words
Apparatus in accordance with claim 28 wherein: said closed loop digital motion control means includes memory means for storing one or more speed profile characteristics; and said central processing unit selectively causes said digital processing means to use a particular one of said speed profile characteristics in controlling said movable part.
Claim 31
Independent Claim
63 words
A method for operating an apparatus as defined in claims 1-29, characterized by providing a camera and lens assembly which is movable at least in part to control at least one condition of said assembly; and in response to the state of said moveable part, controlling said movable part using a closed loop motion control system so as to control said one condition.
References Cited (Backward Citations)
No citation records indexed.
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