Video monitoring equipment and video monitoring system

Abstract

The utility model relates to the technical field of video monitoring, and provides a video monitoring device and a video monitoring system, a camera shooting assembly comprises a lens and an image sensor, the image sensor and the lens are arranged at an interval and used for collecting image information shot by the lens, and a preset included angle is formed between the plane where the image sensor is located and the plane where the lens is located. The lens and the image sensor are both provided with position adjusting parts, and the position adjusting parts adaptively adjust the relative position of the lens or the image sensor, so that a preset included angle is kept between the plane where the image sensor is located and the plane where the lens is located. The control assembly is connected with the position adjusting components and used for controlling the position adjusting components to conduct corresponding position adjustment. According to the utility model, not only can shot image information be comprehensive and clear, but also the problem that the image definition is reduced due to optical blurring of partial positions in an imaging picture because the plane where a shot object is located exceeds the focusing range of the shooting assembly can be effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to video monitoring technical field especially, relate to a kind of video monitoring equipment and video monitoring system. BACKGROUND

[0002] Camera assembly is commonly used electronic device, and has application in security monitoring, face recognition, environmental perception and other fields.When camera assembly is applied to security monitoring, such as video monitoring equipment, limited by actual installation position or actual application scene requirement, the picture presented by camera assembly exists perspective distortion, leading to the inconsistency of the object (building or person) in picture with the view of actual perspective, cannot correctly reflect the size relationship of front and rear position object.

[0003] For example, in actual scene application, because the focusing plane of lens in camera assembly is parallel with the imaging plane of image sensor.When the plane where the object is located and the installation position of camera assembly exist large angle and are close, the plane where the object is located cannot be completely in focusing range, leading to the image definition of part position in imaging picture to reduce due to optical blurring.

[0004] Therefore, in the related art, the picture is adjusted by software to perform deformation such as stretching, compression and rotation to correct the image to keep clear.But, there are still the following defects:

[0005] 1) Large correction needs to crop video material in large area, which will lead to the significant decline of video picture quality after correction;

[0006] 2) Cannot effectively handle the image that the plane where the object is located cannot be completely in focusing range, that is, cannot handle optical blurring caused by exceeding focusing range, and the adjustable range is limited. INVENTION CONTENTS

[0007] The first aspect of the utility model provides a kind of video monitoring equipment to solve at least one technical defect in prior art described above, not only can make the image information shot clear, but also can effectively solve the problem that the plane where the object is located exceeds the focusing range of camera assembly, leading to the image definition of part position in imaging picture to reduce due to optical blurring.

[0008] The second aspect of the utility model provides a kind of video monitoring system.

[0009] The first aspect of the utility model provides a kind of video monitoring equipment, including camera assembly and control assembly.

[0010] The camera assembly comprises a lens and an image sensor, the image sensor is arranged at a position spaced from the lens, and is used for collecting image information shot by the lens; a plane where the image sensor is located is arranged at a preset angle with a plane where the lens is located; the lens and the image sensor are both provided with a position adjusting component; the position adjusting component adaptively adjusts relative positions of the lens or the image sensor, so that the plane where the image sensor is located is kept at the preset angle with the plane where the lens is located.

[0011] The control component is connected with each position adjusting component respectively, and is used for controlling the position adjusting component to perform corresponding position adjustment.

[0012] According to the video monitoring equipment, the position adjusting component comprises a magnetic member and at least one pair of coil assemblies; the magnetic member is arranged on the outer side of the lens or the image sensor; at least one pair of coil assemblies are arranged on the opposite sides of the lens or the opposite sides of the image sensor; when the coil assemblies are electrified, a magnetic field with a required direction and intensity is generated, and the magnetic field acts on the corresponding magnetic member to push the lens or the image sensor to move.

[0013] According to the video monitoring equipment, the position adjusting component comprises a magnetic member, a slip ring assembly and a pair of coil assemblies; the magnetic member is arranged on the outer side of the lens or the image sensor; the slip ring assembly is arranged on the outer side of the magnetic member; a pair of coil assemblies are arranged on the slip ring assembly and located on the opposite sides of the slip ring assembly; the slip ring assembly is adapted to change the position of the slip ring assembly to drive the coil assemblies to change the positions; when the coil assemblies are electrified, a magnetic field with a required direction and intensity is generated, and the magnetic field acts on the corresponding magnetic member to push the lens or the image sensor to move.

[0014] According to the video monitoring equipment, the slip ring assembly comprises a slip ring main body and a driving main body; the slip ring main body is arranged on the outer side of the magnetic member; a pair of coil assemblies are arranged on the slip ring main body; and the driving main body is used for driving the slip ring main body to rotate along an axis.

[0015] According to the video monitoring equipment, the position adjusting component comprises a driving member, a transmission member and a triggering member; the triggering member is arranged on the outer side of the lens or the image sensor; and the transmission member is used for connecting the driving member and the triggering member to transmit a driving force of the driving member to the triggering member to push the lens or the image sensor to move.

[0016] According to the video monitoring equipment, the camera assembly further comprises a lens support; the lens is mounted on the lens support; and the position adjusting component is arranged on the lens support.

[0017] According to the video monitoring device, the control assembly is used for controlling the position adjusting component to perform corresponding position adjustment based on the position feedback information or the angle offset information.

[0018] According to the video monitoring device, the angle sensor is used for detecting the angle offset information of the lens and feeding back the angle offset information to the control assembly.

[0019] According to the video monitoring device, the position sensor is used for detecting the position feedback information of the image sensor and feeding back the position feedback information to the control assembly.

[0020] The utility model provides a kind of video monitoring system, including any one of the video monitoring device.

[0021] The video monitoring device provided by the utility model is set to be a preset included angle between the plane where the image sensor is located and the plane where the lens is located, position adjusting components are arranged on the lens and the image sensor, the position adjusting components adaptively adjust the relative position of the lens or the image sensor, so that the plane where the image sensor is located and the plane where the lens is located are kept at a preset included angle setting. By such setting, not only can the captured image information be comprehensive and clear, but also the problem that the image clarity is reduced due to optical blurring in the imaging picture caused by the fact that the plane where the object to be photographed exceeds the focusing range of the camera assembly can be effectively solved.

[0022] According to the law of Sam, when the extension lines of the expected focusing plane, the lens plane and the imaging plane intersect at a straight line, comprehensive and clear images can be obtained. Therefore, the utility model uses the included angle between the lens plane and the imaging plane to make the camera assembly obtain comprehensive and clear images, i.e. the plane where the image sensor is located and the plane where the lens is located are set to be a preset included angle. Meanwhile, position adjusting components are arranged on the lens and the image sensor, the position adjusting components adaptively adjust the relative position of the lens or the image sensor, so that the lens or the image sensor is adjusted around the horizontal direction (pitch) or the vertical direction (roll) according to the position of the object to be photographed until the expected focusing plane, the lens plane and the imaging plane intersect at a straight line, so that the image is clear. Thus, the adjustment range of the camera assembly can be increased to adapt to video shooting under different working conditions.

[0023] The video monitoring system provided by the utility model includes the above-mentioned video monitoring device, so it has all the advantages mentioned above. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0025] Figure 1 Figure 1 is a structural arrangement schematic diagram of a lens in a video monitoring device provided by an embodiment of the present application.

[0026] Figure 2 Figure 2 is a structural arrangement schematic diagram of an image sensor in a video monitoring device provided by an embodiment of the present application.

[0027] Figure 3 Figure 3 is a position schematic diagram of a lens plane and an imaging plane provided by an embodiment of the present application.

[0028] Figure 4 Figure 4 is one of the schematic diagrams of a space coordinate system provided by an embodiment of the present application.

[0029] Figure 5 Figure 5 is the other schematic diagram of a space coordinate system provided by an embodiment of the present application.

[0030] Figure 6 Figure 6 is a control block diagram provided by an embodiment of the present application.

[0031] Reference signs:

[0032] 10, camera assembly; 11, lens; 12, image sensor;

[0033] 20, position adjusting component; 21, magnetic piece; 22, coil assembly;

[0034] 30, control assembly; 40, angle sensor; 50, position sensor. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the present application more clear, the following will combine the drawings in the present application to clearly and completely describe the technical solutions in the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0036] In the description of the embodiments of the present application, it should be noted that unless specifically defined and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0037] In the embodiments of the present application, unless specifically defined and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be the first feature directly above or obliquely above the second feature, or it can only mean that the first feature is higher than the second feature in horizontal height. The first feature "below", "below" and "below" the second feature can be the first feature directly below or obliquely below the second feature, or it can only mean that the first feature is lower than the second feature in horizontal height.

[0038] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present application and the features of different embodiments or examples without contradiction.

[0039] Figure 1 is a schematic diagram of the structural arrangement of the lens in the video monitoring equipment provided by the embodiments of the present application. Figure 2 is a schematic diagram of the structural arrangement of the image sensor in the video monitoring equipment provided by the embodiments of the present application.

[0040] Referring to Figure 1 and Figure 2 , the present application provides a video monitoring equipment, which comprises a camera assembly 10 and a control assembly 30.

[0041] The camera assembly 10 comprises a lens 11 and an image sensor 12, the image sensor 12 is arranged in a spaced manner with the lens 11, and is used for collecting image information shot by the lens 11, and a plane where the image sensor 12 is located is arranged at a preset included angle with a plane where the lens 11 is located, wherein the plane where the lens 11 is located is an equivalent lens plane of the lens, since the lens in the camera assembly 10 is composed of a plurality of lenses, the lens plane does not separately refer to a lens plane of one lens, but an equivalent lens plane of the plurality of lenses.

[0042] The lens 11 and the image sensor 12 are both provided with a position adjusting component 20, the position adjusting component 20 adaptively adjusts relative positions of the lens 11 or the image sensor 12, so that the plane where the image sensor 12 is located is arranged at the preset included angle with the plane where the lens 11 is located, and the preset included angle can be determined according to the Scheimpflug principle, and the purpose is to make the image sensor 12 obtain a comprehensive clear image.

[0043] By being provided with the position adjusting component 20 on the lens 11 and the image sensor 12, the lens 11 and the image sensor 12 can both be adjusted, so that the adjustment angle is wider, and the adaptability of the photographed object is wider.

[0044] The control assembly 30 is connected with each position adjusting component 20 respectively, and is used for controlling the position adjusting component 20 to perform corresponding position adjustment, the control assembly 30 can be adjusted according to user self-definition, or can be automatically adjusted according to feedback information.

[0045] It can be understood that the video monitoring equipment provided by the embodiment of the utility model, through the plane where the image sensor 12 is located is arranged at the preset included angle with the plane where the lens 11 is located, and the position adjusting component 20 is arranged on the lens 11 and the image sensor 12, the position adjusting component 20 adaptively adjusts relative positions of the lens 11 or the image sensor 12, so that the plane where the image sensor 12 is located is arranged at the preset included angle with the plane where the lens 11 is located. In this way, not only the shot image information is comprehensive and clear, but also the problem that the image definition is reduced due to optical blurring in the imaging picture caused by the plane where the photographed object is located exceeding the focusing range of the camera assembly 10 can be effectively solved.

[0046] According to the Sham law, when the extension lines of the expected focusing plane, the lens plane and the imaging plane intersect on a straight line, a comprehensive clear image can be obtained. Therefore, the present application utilizes the included angle between the lens plane and the imaging plane to make the camera assembly 10 obtain a comprehensive clear image, that is, the plane where the image sensor 12 is located and the plane where the lens 11 is located are arranged at a preset included angle. Meanwhile, the position adjusting component 20 is arranged on the lens 11 and the image sensor 12, and the position adjusting component 20 adaptively adjusts the relative positions of the lens 11 or the image sensor 12, so that the lens 11 or the image sensor 12 is adjusted around the horizontal direction (pitch) or the vertical direction (roll) according to the position of the object to be photographed, until the expected focusing plane, the lens plane and the imaging plane intersect on a straight line, so that the image is adjusted to be clear. The planes where the lens and the image sensor are located can be adjusted at an angle in opposite directions, so that the adjustment range of the camera assembly 10 can be increased to adapt to video shooting in different working conditions, and the limitation of the internal space of the camera on the adjustment range of the angle is greatly solved.

[0047] Continuously referring to Figure 1 In some embodiments of the present application, the position adjusting component 20 comprises a magnetic member 21 and at least one pair of coil assemblies 22; the magnetic member 21 is arranged outside the lens 11 or the image sensor 12, and the at least one pair of coil assemblies 22 are arranged on the opposite sides of the lens 11 or the image sensor 12. When the coil assembly 22 is powered, a magnetic field with a required direction and intensity is generated to act on the corresponding magnetic member 21 to push the lens 11 or the image sensor 12 to move.

[0048] The magnetic member 21 can be a permanent magnet made of ferromagnetic material, such as iron, nickel or other metal oxides, and is arranged in the circumferential direction of the lens 11 and arranged in a ring shape along the direction of the plane normal. The coil assembly 22 is arranged at the adjustment boundary of the permanent magnet, and at least one pair of coil assemblies 22 are arranged, and of course, a plurality of pairs of coil assemblies 22 can also be arranged. When it is necessary to control the deflection of the lens 11, the coil assembly 22 at the corresponding position can be powered to generate a magnetic field with a required direction and intensity to push the optical axis of the lens 11 to deviate at a predetermined angle, so as to ensure that the plane where the image sensor 12 is located and the plane where the lens 11 is located are arranged at a preset included angle.

[0049] The magnetic member 21 and the at least one pair of coil assemblies 22 are arranged on the image sensor 12 in a manner consistent with the above-described manner of arrangement on the lens 11, and can be arranged on the image sensor 12 in the above-described manner, i.e., permanent magnets are arranged around the image sensor 12, and the at least one pair of coil assemblies 22 are arranged within the adjustment boundary of the permanent magnets. When it is necessary to control the image sensor 12 to perform deflection, the coil assembly 22 at the corresponding position can be powered to generate a magnetic field of a required direction and strength to push the image sensor 12 to pitch or roll, so as to ensure that the plane in which the image sensor 12 is located and the plane in which the lens 11 is located are arranged at a preset included angle.

[0050] In some embodiments of the present application, the position adjustment component 20 comprises the magnetic member 21, the slip ring assembly, and the pair of coil assemblies 22.

[0051] The magnetic member 21 is arranged outside the lens 11 or the image sensor 12, the slip ring assembly is arranged outside the magnetic member 21, and the pair of coil assemblies 22 are arranged in the slip ring assembly and located on opposite sides of the slip ring assembly. The slip ring assembly is adapted to change its own position to drive the coil assembly 22 to change position. When the coil assembly 22 is powered, a magnetic field of a required direction and strength is generated to act on the corresponding magnetic member 21 to push the lens 11 or the image sensor 12 to move.

[0052] Accordingly, in the embodiments of the present application, the slip ring assembly is arranged as the mounting carrier of the coil assembly 22, and only one pair of coil assemblies 22 can be arranged. The pair of coil assemblies 22 are changed in position by rotating the slip ring assembly, so as to realize adjustment of the lens 11 or the image sensor 12 at different positions. In this way, the number of coil assemblies 22 can be reduced, and thus the control circuit is simplified.

[0053] For example, when it is necessary to adjust the position of the lens 11 in the up-down direction, the slip ring assembly can be controlled to rotate so that the coil assembly 22 is arranged in the up-down direction on the slip ring assembly. When it is necessary to adjust the position of the lens 11 in the left-right direction, the slip ring assembly can be controlled to rotate so that the coil assembly 22 is arranged in the left-right direction on the slip ring assembly. The pair of coil assemblies 22 are changed in position by the slip ring, and the lens 11 at different positions can be controlled to deflect.

[0054] Specifically, the slip ring assembly comprises a slip ring main body and a driving main body. The slip ring main body is arranged outside the magnetic member 21, and the pair of coil assemblies 22 are arranged in the slip ring main body. The driving main body is used to drive the slip ring main body to rotate along the axis.

[0055] The sliding ring assembly is similar to a planetary gear structure, a circle of teeth is arranged on the outer circumferential surface of the sliding ring body, a mounting portion is arranged on the inner wall of the sliding ring body, the coil assembly 22 is mounted on the mounting portion, the driving body can be a motor, the output shaft of the motor is connected with a driving gear, the driving gear is engaged with the teeth arranged on the outer circumferential surface of the sliding ring body, the motor is operated to drive the driving gear to rotate, so that the sliding ring body rotates, and the position of the coil assembly 22 mounted on the inner circle of the sliding ring body changes.

[0056] In some embodiments of the present application, the position adjusting component 20 comprises a driving member, a transmission member and a triggering member, the triggering member is arranged outside the lens 11 or the image sensor 12, and the transmission member is used to connect the driving member and the triggering member to transmit the driving force of the driving member to the triggering member to push the lens 11 or the image sensor 12 to move.

[0057] The driving member can be a motor, the triggering member can be a push rod or the like, and the transmission member can be a structure for adjusting rotary motion to linear motion.

[0058] In some embodiments of the present application, the camera assembly 10 further comprises a lens 11 support, the lens 11 is mounted on the lens 11 support, and the position adjusting component 20 is arranged on the lens 11 support.

[0059] Specifically, when the coil assembly 22 is a pair, the pair of coil assemblies 22 are arranged on opposite sides of the lens 11 support respectively, when the pair of coil assemblies 22 are electrified, the magnetic member 21 generates a translational force on the coil assembly 22 to exert a pushing force on the lens 11 support, thereby driving the lens 11 to move in the horizontal direction.

[0060] When the coil assembly 22 is arranged in two pairs, four coil assemblies 22 are arranged on four sides of the lens 11 support respectively, two coil assemblies 22 are arranged oppositely, and the other two coil assemblies 22 are also arranged oppositely. When one pair of coil assemblies 22 is electrified, the lens 11 can be driven to move in one direction, therefore, by arranging two pairs of coil assemblies 22, the lens 11 can be driven to move in two different directions, thereby realizing position adjustment of the lens 11 in different directions to ensure that the plane where the image sensor 12 is located and the plane where the lens 11 is located maintain a preset included angle.

[0061] In some embodiments of the present application, the control component 30 is used to control the position adjusting component 20 to adjust the position based on the position feedback information or the angle offset information, to realize automatic focusing plane marking and positioning, and to realize corresponding position adjustment of the lens 11 optical axis angle and the image sensor 12 according to the positioning result, to realize perspective relationship adjustment and view angle correction.

[0062] Figure 3It is a position schematic view of a lens plane and an imaging plane provided by the embodiment of the utility model. Figure 4 It is a schematic view of a space coordinate system provided by the embodiment of the utility model. Figure 5 It is a schematic view of a space coordinate system provided by the embodiment of the utility model.

[0063] Referring to Figure 3 And Figure 4 , a space coordinate system can be constructed at the lens plane, taking the intersection of the lens optical axis and the lens plane as the origin (0, 0, 0) of the space coordinate system, at this time, the lens plane is in the plane with coordinates (0, y, z); assuming that the distance from the lens plane to the imaging plane of the image sensor when focusing at infinity is λ, at this time, the imaging plane is (-λ, y, z) plane.

[0064] The user selects three mark points p1, p2 and p3 on the required focusing plane of the object to be photographed; in the state that the optical axis is perpendicular to the imaging plane, the lens is focused to the three mark points in turn, and the focusing distance (i.e. the distance from the focusing point to the imaging plane) when focusing at each point is read, and the x-axis coordinate of each point is obtained based on the distance.

[0065] Meanwhile, the y and z-axis coordinates of the corresponding point can be calculated through the lens focal length and the position of the selected point in the picture. After the coordinates of the three points are determined, the specific coordinate parameters of the focusing plane can be determined, and then the intersection of the focusing plane and the imaging plane can be obtained, and the optical axis offset direction and offset angle required for complete focusing can be calculated based on the intersection coordinates.

[0066] Specifically, the x-axis coordinate of each point can be determined by adjusting the lens flange focal length for focusing when there is no focusing plane offset, the lens flange focal length is also called flange focal distance, which is the distance between the installation flange and the convergence point of the incident lens parallel light, that is, the distance between the camera lens mount and the image sensor, and the distance is a known distance.

[0067] Since the flange focal length and the actual focusing distance have a one-to-one correspondence, the actual focusing distance x value can be determined by the flange focal length when the actual lens focusing is completed. The y and z-axis coordinates need to be matched with the actual imaging area size and the lens field of view angle to determine, when the imaging center of the lens and the center of the imaging area are on the same axis, the imaging position and the actual scene position have a one-to-one corresponding function relationship (the slight deviation caused by the lens distortion and the image field curvature, the uneven imaging surface can be ignored here).

[0068] Referring to Figure 5 , assuming that the horizontal length of the imaging area is , and the vertical length is ; the effective horizontal field of view angle of the imaging lens at the actual imaging area is , and the vertical field of view angle is , according to the focal length of the focusing flange, the actual point distance coordinates are measured as ; Then the maximum offset in any quadrant of the set spatial coordinate axis can be expressed as ; Similarly .

[0069] The coordinates of each point in the rest of the space can be determined by selecting the coordinates of the point in the image sensor area and the effective field of view angle parameters of the corresponding lens. The y and z axis coordinates in the actual space can be obtained by multiplying the sensor coordinates with the conversion coefficient of the corresponding field of view angle.

[0070] For example, let the coordinates of the three points be 、 、 ; Assume that the actual focal plane equation to be measured is ; Substituting the coordinates of the three points into the plane equation respectively, we can obtain the specific values ​​of the coefficients and constant terms in the equation, and then determine the focal plane equation, the required optical axis deviation direction and angle.

[0071] For example, taking a 135-size image sensor and a 50mm focal length lens as an example, the long side a of the image sensor is 36mm and the short side b is 24mm; under this specification, the horizontal field angle of the lens is About 46°, vertical field of view About 30°.

[0072] Focus on three points and read their focal distances λ and actual x-axis distances. For example, consider the point with sensor coordinates (-42, -18, -12). Based on the lens focal distance and actual distance, the actual object distance x value is 15000. Its y-axis coordinate is 6428, and its z-axis coordinate is 4285, so the coordinates of this point are (1500, 6428, 4285).

[0073] Similarly, the actual point space coordinates can be obtained by reading the relative center point distance coordinates on the image sensor and obtaining the actual focus distance. Substitute the three point space coordinates into the formula , you can get the equation of the plane in that space. For example, if the coordinates of three points are point 1: (2000, 0, 0), point 2: (0, -3000, 0), and point 3: (0, 0, -1000), you can substitute them into the formula to get the equation of the plane: 3x + 2y - 6z - 6 = 0.

[0074] In addition, it is also necessary to point out that the specific range of the lens optical axis offset direction and the offset angle needs to be limited in combination with the actual space structure and the maximum image field that the lens can provide. When the optical axis angle needs to be adjusted greatly, the lens needs to provide an image field and a light flux to meet the limitation requirement, so as to avoid the picture degradation and partial black edges, dark corners and the like caused by exceeding the lens imaging circle or the effective design image field.

[0075] Meanwhile, the lens optical axis coordinate calculation gives priority to the action range in which the lens optical axis does not move, that is, the imaging center is locked at the coordinate axis position, so as to ensure that the lens optical axis adjustment action distance is as small as possible. When the calculated lens optical axis tilt angle is greater than the set limit angle, the result is fed back beyond the limit and is adjusted tentatively according to the maximum allowed angle, so that the clear range of the imaging effect in the plane is the largest when other conditions remain unchanged.

[0076] When the lens coordinate remains unchanged, the image sensor is deviated through the pitching or swinging action, so that the picture is deformed in the corresponding action direction, and the visual angle offset caused by the lens placement position is corrected. After the position offset is zeroed, two points that need to be calibrated are selected in the actual picture, the basic reference line that needs to be calibrated is calculated through coordinate acquisition, and the corresponding compensation reference line coordinate is fitted in the area after the lens imaging based on the reference line.

[0077] By displacing the imaging area of the image sensor to the position of the corresponding compensation reference line, the deformation caused by the visual angle perspective can be corrected without changing the overall installation position. Meanwhile, the device image sensor and the lens optical axis are offset synchronously, so that the offset angle and the imaging quality are maximally expanded, and the relative position of the sensor after the offset is ensured to be as close as possible to the center of the imaging circle.

[0078] It can be understood that in the embodiments of the utility model, two parts are mainly divided, which are "automatic focusing plane identification part" and "position action control part" respectively.

[0079] The automatic focusing plane identification part is used for detecting the required focusing plane and calculating the required relative plane position relationship. According to the optical imaging and the Schiim law, when the imaging lens optical axis is perpendicular to the imaging sensor plane, the focusing plane (the plane where the clear imaging point is located) is parallel to the image sensor plane.

[0080] When the required focusing plane is not parallel to the imaging plane, it is assumed that the two planes intersect at a straight line in space, and when the lens plane coincides with the straight line, the actual focusing plane can be consistent with the required and focusing plane.

[0081] By reading and coordinate calculation of focus position, the automatic focusing plane measurement and the imaging scheme of corresponding lens optical axis angle, image sensor displacement adjustment are completed.

[0082] Figure 6 The control block diagram is provided in the embodiments of the present application.

[0083] Referring to Figure 6 The video monitoring device further comprises an angle sensor and a position sensor, the angle sensor is used for detecting angle offset information of the lens and feeding back the angle offset information to the control component, and the position sensor is used for detecting position feedback information of the image sensor and feeding back the position feedback information to the control component.

[0084] Since a ring of permanent magnets is arranged at the direction perpendicular to the optical axis of the lens, and controllable-state electromagnetic coils are arranged on the plane in the fixed frame with movement allowance and not parallel to the ring of permanent magnets, the required magnetic field is generated by energizing control of different coils, and then the lens displacement and the optical axis inclination angle are controlled.

[0085] In the embodiments of the present application, the control component controls the swing and pitching actions of the lens optical axis angle and the image sensor by receiving the adjustment angle and direction coordinates sent by the automatic focusing plane identification part, so as to complete the adjustment of the actual imaging area and effect.

[0086] That is, when the angle and direction control data sent by the automatic focusing plane identification part is received, the coils at different positions are energized to generate the required magnetic field of direction and intensity, the lens optical axis is pushed to the predetermined angle offset, and the image sensor is pitched / swung to the required position, so as to achieve the purpose of adjusting the actual controllable optical axis and imaging plane.

[0087] During the adjustment action, the corresponding angle sensor and position sensor provide corresponding adjustment information feedback, so as to automatically calibrate the adjustment condition and improve the control precision.

[0088] The embodiments of the present application further provide a video monitoring system, comprising the video monitoring device of any one of the embodiments.

[0089] It should be finally pointed out that: the above examples are only used to illustrate the technical solutions of the utility model, and not to limit them; although the utility model has been explained in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. A video surveillance device, characterized in that: include: A camera assembly comprising a lens and an image sensor, the image sensor being spaced apart from the lens and configured to capture image information captured by the lens, the image sensor being disposed at a predetermined angle to the lens, the lens and the image sensor being provided with position adjustment components adapted to adjust the relative position of the lens or the image sensor so that the image sensor and the lens maintain a predetermined angle. The control components are respectively connected to the position adjustment components and are used to control the position adjustment components to perform corresponding position adjustment.

2. The video surveillance device according to claim 1, wherein: The position adjustment component includes a magnetic member and at least one pair of coil assemblies; The magnetic component is arranged on the outside of the lens or the image sensor, and at least one pair of the coil assemblies are arranged on opposite sides of the lens or the image sensor. When the coil assemblies are energized, they generate a magnetic field of the required direction and intensity, which interacts with the corresponding magnetic component to push the lens or the image sensor to move.

3. The video surveillance device according to claim 1, wherein: The position adjustment component includes a magnetic component, a slip ring assembly and a pair of coil assemblies; The magnetic component is disposed on the outside of the lens or the image sensor, the slip ring assembly is disposed on the outside of the magnetic component, and a pair of coil assemblies are disposed on the slip ring assembly and are located on opposite sides of the slip ring assembly. The slip ring assembly is suitable for changing its own position to drive the coil assembly to change its position. When the coil assembly is energized, it generates a magnetic field of a desired direction and intensity, which acts with the corresponding magnetic component to drive the lens or the image sensor to move.

4. The video surveillance device according to claim 3, characterized in that The slip ring assembly includes a slip ring body and a driving body. The slip ring body is arranged on the outside of the magnetic component. A pair of coil assemblies are arranged on the slip ring body. The driving body is used to drive the slip ring body to rotate along the axis.

5. The video surveillance device according to claim 1, wherein: The position adjustment component includes a driving member, a transmission member and a trigger member. The trigger member is arranged on the outside of the lens or the image sensor. The transmission member is used to connect the driving member and the trigger member to transmit the driving force of the driving member to the trigger member to push the lens or the image sensor to move.

6. The video surveillance device according to claim 1, wherein: The camera assembly further comprises a lens mount, the lens is mounted on the lens mount, and the position adjustment component is arranged on the lens mount.

7. The video surveillance device according to any one of claims 1 to 6, characterized in that: The control component is used to control the position adjustment component to perform corresponding position adjustment based on position feedback information or angle offset information.

8. The video surveillance device according to claim 7, characterized in that: An angle sensor is also included, and the angle sensor is used to detect the angle offset information of the lens and feed the angle offset information back to the control component.

9. The video surveillance device according to claim 7, characterized in that: It also includes a position sensor, which is used to detect position feedback information of the image sensor and feed the position feedback information back to the control component.

10. A video surveillance system, characterized in that: The video surveillance device comprises the video surveillance device according to any one of claims 1 to 9.

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