Security surveillance camera equipment

Abstract

This invention discloses a security monitoring camera device, comprising a power supply unit, a lens unit, an image pickup unit, a detection unit, and a processing unit. The lens unit includes an objective lens and a drive mechanism. The drive mechanism can drive the objective lens to move in multiple stages according to the input current, and the objective lens displacement and the current form a mapping relationship. The lens's field of view constitutes a monitoring area, which is divided into rectangular grid units. Each grid unit is assigned coordinates, and these coordinates form a mapping relationship with the input current. The detection unit detects heat sources within the grid in real time and uploads the corresponding grid coordinates to the processing unit. The processing unit pre-stores two layers of mapping relationships and communicates with the power supply unit and the detection unit respectively. After receiving the coordinates, it matches the corresponding current and controls the power output to the drive mechanism, driving the objective lens to accurately align with the grid where the heat source is located. This achieves automatic targeted tracking and monitoring of the heat source target, improving the intelligence and accuracy of security monitoring and ensuring effective tracking and clear recording of abnormal heat source targets.

Description

Technical Field

[0001] This invention relates to the field of security monitoring technology, and in particular to a security monitoring camera device with adaptive adjustment function for heat source positioning. Background Technology

[0002] In existing security monitoring technologies, traditional camera equipment mostly uses fixed lenses or manual lens angle adjustment for monitoring. Their monitoring range is fixed, and they cannot proactively adjust the monitoring direction based on anomalies within the monitored area, resulting in blind spots or insufficient monitoring of key targets. Even some existing equipment with electric focusing or angle adjustment functions often relies on manual remote control or simple motion detection triggers, leading to low adjustment accuracy, slow response speed, and a lack of targeted tracking capabilities for specific targets (such as human bodies, abnormally high-temperature equipment, and other heat sources).

[0003] For example, in security scenarios such as industrial parks, warehouses, and residences, when unauthorized intrusion occurs or equipment exhibits abnormal high temperatures, traditional monitoring equipment can only passively record the overall image of the monitored area. It cannot automatically focus on the location of the abnormal heat source, leading to a significant time commitment to sift through relevant information during subsequent review and a high risk of missing crucial details. Furthermore, existing monitoring equipment with adjustment functions often relies on fuzzy location signals for adjustment logic, lacking digital and precise control criteria. This makes the adjustment process prone to deviations, hindering stable target tracking and severely impacting the reliability and practicality of security monitoring.

[0004] Therefore, there is an urgent need for a security monitoring device that can automatically identify heat source targets, accurately locate their positions, and adaptively adjust the lens to achieve targeted monitoring, in order to solve the technical problems of poor monitoring targeting and low adjustment accuracy in existing technologies. Summary of the Invention

[0005] The purpose of this invention is to provide a security monitoring camera device. This security monitoring camera device combines heat source detection, grid modeling of the monitoring area and current segmentation control technology to achieve automatic positioning and precise lens alignment of heat source targets (such as human bodies) entering the monitoring area, thereby improving the intelligence and accuracy of security monitoring and ensuring effective tracking and clear recording of abnormal heat source targets.

[0006] To achieve the above objectives, the present invention provides a security monitoring camera device, comprising: A power supply unit that provides power; The lens unit includes an objective lens and a drive mechanism. The drive mechanism drives the objective lens to move in a multi-stage manner by means of changes in the magnitude of the input current. The multi-stage movement of the objective lens is mapped to the magnitude of the input current. The image pickup unit has a lens unit disposed at the front end of the image pickup unit. The monitored object acquires an image through the lens unit and forms an image in the image pickup unit. The area that the lens unit can capture forms a monitoring area, which is divided into rectangular grid units, each grid unit corresponding to a coordinate value; the change of the coordinate value is mapped to the magnitude of the input current. A detection unit for detecting heat sources, wherein the detection unit detects heat sources entering the grid cell; The processing unit has a pre-stored mapping relationship between the changes in the coordinate values ​​and the magnitude of the input current. The processing unit also has a pre-stored mapping relationship between the multi-segment movement of the objective lens and the magnitude of the input current. The processing unit is communicatively connected to the power supply unit and the detection unit. The detection unit sends the coordinate values ​​of the grid cells corresponding to the detected heat source to the processing unit. The processing unit controls the power supply unit to output the corresponding input current to the drive mechanism according to the mapping relationship between the coordinate values ​​and the input current.

[0007] Compared with existing technologies, the security monitoring camera device of the present invention achieves automatic tracking and monitoring of heat source targets through closed-loop control of "heat source detection → coordinate feedback → current regulation → objective lens alignment". The specific workflow is as follows: During operation, the power supply unit supplies power to each unit; the image acquisition unit acquires images of the monitoring area in real time; the detection unit monitors all grid units within the monitoring area in real time; when a heat source target enters a grid unit or the temperature of a target within a grid unit rises, the detection unit immediately identifies the heat source and collects the coordinate value of the grid unit, sending the coordinate value signal to the processing unit in real time; after receiving the coordinate signal, the processing unit, based on the pre-stored mapping relationship between coordinate values ​​and input current, retrieves the magnitude of the input current corresponding to the coordinate value and sends a current output command to the power supply unit; the power supply unit outputs the corresponding magnitude of input current to the drive mechanism according to the command; the drive... Under the influence of the input current, the actuator, based on a pre-defined mapping relationship between the multi-segment movement of the objective lens and the magnitude of the input current, drives the objective lens to move to the position corresponding to the coordinate value, ensuring precise alignment of the lens with the area where the heat source target is located. Simultaneously, while the lens is precisely aligned with the heat source target, the image acquisition unit synchronously acquires images of that area, ultimately generating a clear monitoring image, completing targeted monitoring of the heat source target. If the heat source target moves within the monitoring area and enters other grid cells, the detection unit updates the coordinate values ​​in real time and transmits them to the processing unit. The processing unit repeats the above control process, continuously driving the objective lens to follow the heat source target, ensuring continuous tracking of the target. Therefore, this security monitoring camera device, through the combination of heat source detection, grid-based modeling of the monitoring area, and segmented current control technology, achieves automatic positioning and precise lens alignment of heat source targets (such as human bodies) entering the monitoring area, improving the intelligence and precision of security monitoring and ensuring effective tracking and clear recording of abnormal heat source targets.

[0008] Compared with the prior art, the present invention has the following positive and beneficial effects: (1) The present invention maps the magnitude of the input current to the multi-segment movement of the objective lens, so that the drive mechanism drives the objective lens to move by changing the magnitude of the input current. Each current value corresponds to a fixed movement stroke of the objective lens, which effectively ensures the precise positioning of the lens and further ensures that the lens can be accurately aligned with the grid cell where the heat source is located. At the same time, this multi-segment mapping relationship between the magnitude of the current and the movement distance of the objective lens makes the lens adjustment response fast and precise, and avoids the problems of jamming and offset in mechanical adjustment, thus improving the stability and reliability of lens adjustment.

[0009] (2) This invention forms a monitoring area by dividing the area of ​​the image that the lens unit can acquire into a grid unit and assigning corresponding coordinate values ​​to the monitoring area, thus completing the digital calibration of the physical monitoring area and providing a guarantee for precise control. This breaks through the technical problem of "fuzzy positioning" in existing monitoring equipment. At the same time, this invention constructs a complete closed-loop control of "heat source detection → coordinate feedback → current regulation → objective lens alignment", which can complete the identification, positioning and objective lens adjustment of heat source targets without manual intervention, thereby improving the intelligence and precision of security monitoring. It also ensures the effective tracking and clear recording of abnormal heat source targets. This effectively solves the technical problem that existing traditional monitoring equipment adopts a "panoramic" monitoring mode, which relies on manual screening for the identification of abnormal targets, resulting in low efficiency and easy omission of key information.

[0010] (3) This invention uses a detection unit specifically to detect heat source targets (such as human bodies, equipment with abnormal high temperatures, etc.). Combined with the gridding and coordinate mapping of the monitoring area, it can quickly locate the specific position of the heat source. Then, through the linkage of the processing unit and the drive mechanism, it accurately drives the objective lens to align with the target area, achieving "targeted" tracking and monitoring. At the same time, this invention enables the monitoring equipment to actively focus on abnormal heat source targets instead of passively recording panoramic images, significantly improving the effectiveness of monitoring information. It is especially suitable for security scenarios such as parks, warehouses, and residences that are sensitive to personnel intrusion or abnormally high temperatures of equipment.

[0011] Preferably, the driving mechanism of the security monitoring camera device of the present invention includes a housing, an electromagnet that generates a magnetic field when energized, and a traction member that can be attracted by the energized electromagnet. The housing has a through-hole for light to enter. The electromagnet is fixed inside the housing and electrically connected to the power supply unit. The objective lens is fixedly connected to the traction member. The traction member is slidably disposed in the optical path channel and located directly in front of the electromagnet. The objective lens is suspended and centrally disposed in the optical path channel by the support of the traction member. The electromagnet adjusts the moving distance of the objective lens by the change in the magnitude of the input current of the power supply unit.

[0012] Preferably, the traction component of the security monitoring camera device of the present invention always has a tendency to move away from the electromagnet, so that the traction component resets after the attraction of the electromagnet to the traction component is removed.

[0013] Preferably, the traction component of the security monitoring camera device of the present invention includes a support part and a ball bearing that can be attracted by the electromagnet when energized. The support part is fixedly connected to the objective lens. The objective lens is suspended and centrally positioned in the optical path channel by means of the support part. The ball bearing is rolled on the support part. The housing has a sliding groove in which the ball bearing is rolled and received. Attached Figure Description

[0014] Figure 1 This is a structural schematic diagram of the security monitoring camera device of the present invention.

[0015] Figure 2 This is a schematic diagram of an embodiment of the security monitoring camera device of the present invention forming a monitoring area.

[0016] Figure 3 This is a schematic diagram of the lens unit of the present invention.

[0017] Figure 4 This is a schematic diagram of the objective lens in the security monitoring camera device of the present invention in its initial state.

[0018] Figure 5 This is a schematic diagram of the objective lens in the security monitoring camera device of the present invention, showing the state when the lens has moved to its furthest point. Detailed Implementation

[0019] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0020] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0021] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0022] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0023] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0024] Unless otherwise specified, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0025] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0026] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0027] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0028] In view of the deficiencies in the existing technology, the applicant, based on years of practical experience and professional knowledge in the design and manufacture of such products, and in conjunction with the application of theoretical principles, actively conducted research and innovation in order to create a technology that could solve the deficiencies in the existing technology. After continuous research, design, and repeated prototype production and improvement, the present invention, which has practical value, was finally created.

[0029] like Figures 1-5 As shown, the security monitoring camera device 100 of the present invention includes a power supply unit 1, a lens unit 2, an image pickup unit 3, a detection unit 4, and a processing unit 5. The following continues to describe the components in conjunction with these components. Figures 1-5 The security monitoring camera device 100 of the present invention will be described in further detail below.

[0030] Continue as shown in the image - Figure 5 As shown, the power supply unit 1 of the present invention provides power to various devices. The lens unit 2 of the present invention includes an objective lens 21 and a driving mechanism 22. The driving mechanism 22 drives the objective lens 21 to move in a multi-segment manner by varying the magnitude of the input current. The multi-segment movement of the objective lens 21 is mapped to the magnitude of the input current. The lens unit 2 of the present invention is disposed at the front end of the image acquisition unit 3. The monitored object is imaged by the lens unit 2 and an image is formed in the image acquisition unit 3. The area of ​​the image that the lens unit 2 can acquire forms a monitoring area 200. The monitoring area 200 is divided into rectangular grid cells 201, and each grid cell is assigned a coordinate value. Specifically, in conjunction with Figure 2 As shown, the coordinate values ​​of grid cell 201 vary depending on its location; for ease of understanding and explanation, Figure 2Coordinate values ​​are directly annotated within grid cells 201 at different locations. The changes in the coordinate values ​​of the grid cells 201 in this invention form a mapping relationship with the magnitude of the input current. The detection unit 4 of this invention detects heat sources entering the grid cells 201. The processing unit 5 of this invention pre-stores the mapping relationship between the changes in the coordinate values ​​and the magnitude of the input current. The processing unit 5 is communicatively connected to both the power supply unit 1 and the detection unit 4. The detection unit 4 sends the coordinate values ​​of the grid cells 201 corresponding to the detected heat source to the processing unit 5. The processing unit 5 controls the power supply unit 1 to output the corresponding input current to the drive mechanism 22 according to the mapping relationship between the coordinate values ​​and the input current. During operation, power supply unit 1 supplies power to each unit; image acquisition unit 3 acquires images in real time to form a monitoring area 200; detection unit 4 monitors all grid cells 201 within the monitoring area 200 in real time; when a heat source target enters a certain grid cell 201 or the temperature of a target within a certain grid cell 201 rises, detection unit 4 immediately identifies the heat source and collects the coordinate value of the grid cell 201, sending the coordinate value signal to processing unit 5 in real time; after receiving the coordinate signal, processing unit 5, based on the pre-stored mapping relationship between coordinate values ​​and input current, retrieves the magnitude of the input current corresponding to the coordinate value and sends a current output command to power supply unit 1, and power supply unit 1 outputs the corresponding magnitude of input current to drive mechanism 22 according to the command. Under the influence of the input current, the driving mechanism 22, based on the pre-defined mapping relationship between the multi-segment movement of the objective lens 21 and the magnitude of the input current, drives the objective lens 21 to move to the position corresponding to the coordinate value, so that the lens is accurately aligned with the area where the heat source target is located. At the same time, while the lens is accurately aligned with the heat source target, the image acquisition unit 3 simultaneously acquires the image of the area, and finally generates a clear monitoring image, completing the targeted monitoring of the heat source target. If the heat source target moves within the monitoring area and enters other grid units 201, the detection unit 4 will update the coordinate value in real time and transmit it to the processing unit 5. The processing unit 5 repeats the above control process, continuously driving the objective lens 21 to follow the movement of the heat source target, ensuring continuous tracking of the target. Thus, the security monitoring camera device 100 of the present invention, through the combination of heat source detection, grid modeling of the monitoring area and current segmentation control technology, realizes automatic positioning and precise lens alignment of heat source targets (such as human bodies) entering the monitoring area, improves the intelligence and accuracy of security monitoring, and ensures effective tracking and clear recording of abnormal heat source targets.

[0031] Continue to combine Figures 1-5As shown, specifically, the image pickup unit 3 of this invention uses a CMOS image sensor, which is fixedly installed at the rear of the entire device. The lens unit 2 is sealed and assembled at the front of the image pickup unit 3, and the two are coaxially aligned. The light from the monitored scene passes through the objective lens 21 and the optical path channel 26 in sequence and is then vertically projected onto the CMOS photosensitive target surface, outputting a high-definition digital image in real time. The image pickup unit 3 is synchronously connected to the local storage module and the network transmission module, which can both record and save the screen locally and push the monitoring screen to the back-end security platform in real time. The light-sensing range of the image pickup unit 3 and the field of view of the lens unit 2 are completely matched, and the two together define the monitoring area 200 of this invention. The grid setting of the grid units of the monitoring area 200 is completed before the invention leaves the factory. Further, the rectangular monitoring area 200 of this invention is divided into M rows × N columns of grid units 201. Each grid unit 201 is assigned a unique two-dimensional coordinate value (X, Y), where X represents the horizontal column number and Y represents the vertical row number. Two mapping relationships are established and pre-stored in the built-in memory of the processing unit 5. The first mapping relationship is: grid coordinate value (X, Y) → current value; the second mapping relationship is: current value → multi-segment movement distance of objective lens 21. The two mappings correspond one-to-one. At the same time, the following principles must also be met: when the initial state of lens 21 is that the travel of lens 21 is zero, the coordinate value corresponding to lens 21 is located at the bottom left corner of the grid cell, and the coordinate value of the bottom left corner grid cell 201 is located at (1, 1); when lens 21 reaches the maximum travel, the coordinate value corresponding to lens 21 is located at the top right corner of the grid cell, and the coordinate value of the top right corner grid cell 201 is located at (N, M)).

[0032] like Figures 1-5As shown, the driving mechanism 22 of the security monitoring camera device 100 of the present invention includes a housing 23, an electromagnet 24 that generates a magnetic field when energized, and a traction member 25 that can be attracted by the energized electromagnet 24. Specifically, the traction member 25 of the present invention is made of a magnetic material. The housing 23 of the present invention has a through-hole optical path channel 26 for light to enter, and the electromagnet 24 is fixed inside the housing 23 and electrically connected to the power supply unit 1. The objective lens 21 is fixedly connected to the traction member 25, and the traction member 25 is slidably disposed in the optical path channel 26 and located directly in front of the electromagnet 24; specifically, the housing 23 has a groove 231 parallel to the optical axis of the objective lens 21, and the traction member 25 is slidably disposed with the groove 231. The objective lens 21 of the present invention is suspended and centrally positioned in the optical path channel 26 by means of the traction member 25; the electromagnet 24 adjusts the moving distance of the objective lens 21 by means of the change in the magnitude of the input current of the power supply unit 1; specifically, the processing unit 5 of the present invention controls the power supply unit 1 to output a corresponding input current to the electromagnet 24 according to the mapping relationship between coordinate values ​​and input current. Under the action of the input current, the electromagnet 24 generates an attractive force on the traction member 25, thereby causing the traction member 25 to synchronously move the objective lens 21 to the mapped segment, thereby realizing the condition of the moving distance of the objective lens 21 (i.e., position adjustment).

[0033] like Figures 3-5As shown, the traction member 25 of the present invention always tends to move away from the electromagnet 24, so that the traction member 25 returns to its original position after the attraction of the electromagnet 24 to be removed. Specifically, the drive mechanism 22 also includes a helical spring 27, which is arranged in a stretched state between the housing 23 and the traction member 25, thereby ensuring that the traction member 25 always tends to move away from the electromagnet 24. More specifically, the traction member 25 of the present invention includes a support portion 251 and a ball bearing 252 that can be attracted by the energized electromagnet 24. The support portion 251 is fixedly connected to the objective lens 21. The objective lens 21 is suspended and centrally disposed in the optical path channel 26 by the support of the support portion 251. The ball bearing 252 is rolled on the support portion 251 and is rolled and received in the groove 231. Furthermore, the first end of the helical spring 27 of the present invention is fixed to the housing 23, and the second end of the helical spring 27 is connected to the support 251. The housing 23 is also provided with a movable groove 232 for the helical spring 27 to extend and retract. This movable groove 232 communicates with the sliding groove 231 at a corresponding location, allowing the support 251 to extend into it and slide synchronously with the ball 252, preventing obstruction of the support 251 and thus limiting the rolling of the ball 252. A flexible anti-collision block 28 is provided at the starting end of the sliding groove 231, and a flexible anti-collision block 29 is provided at the starting end of the movable groove 232 away from the sliding groove 231. The anti-collision blocks 28 and 29 effectively prevent the ball 252 from moving to the starting position (…). Figure 4 (as shown in the state) and the maximum travel point ( Figure 5 In the state shown, a rigid contact rebound phenomenon occurs; in the initial state, i.e., when the objective lens 21 moves at zero distance, the ball 252 and the anti-collision block 28 at the starting end of the slide 231 abut against each other under the pull of the coil spring 27; when the ball 252 is at its maximum stroke, the support part 251 abuts against the anti-collision block 29, ensuring that there is a gap (not shown in the figure) between the ball 252 and the electromagnet 24. The maximum stroke of the ball 252 is the distance between the projections of the two misaligned anti-collision blocks 28 and 29 in the direction of movement of the objective lens 21, and the maximum stroke of the ball 252 is also the maximum stroke of the objective lens 21.

[0034] More specifically, with Figure 2Taking the example shown, let's illustrate by dividing the monitoring area 200 into 4 rows × 3 columns of grid units 201: The monitoring area 200 is divided into 4 rows × 3 columns of grid units 201, and their corresponding grid coordinate values ​​(X, Y) are (1,1), (2,1), (1,2), (2,2), (3,1), (1,3), (3,2), (2,3), (1,4), (3,3), (2,4), and (3,4), respectively. The 12 segments of the objective lens 21, which are mapped one-to-one with the coordinates of the above 12 grid units 201, are the first segment...the second segment; where the first segment is defined as the initial position, and the coordinate value corresponding to the zero travel of the objective lens 21 is (1,1), that is... Figure 4 The position of objective lens 21 is shown; the twelfth position is defined as the maximum travel, and the maximum travel of objective lens 21 corresponds to the coordinates (3,4), that is... Figure 5 The position of objective lens 21 is shown. The first position of objective lens 21 is zero stroke, corresponding to the initial state, with a current value of 0 mA. The twelfth position of objective lens 21 is the maximum stroke, with a corresponding current value of 1000 mA. Based on the axial electromagnetic attraction generated by electromagnet 24 after energization, and under the reverse elastic force of helical spring 27, the equilibrium displacement stroke of objective lens 21 satisfies a linear relationship: F 电磁力 =kI (where k is the electromagnet's structural constant and I is the current value), F 弹簧 =K S .S (where: K) S The elastic coefficient (S is the objective lens travel distance) is given. Under equilibrium conditions, k·I = k_s·S, so the objective lens displacement S ∝ I, meaning the axial travel of objective lens 21 is directly proportional to the input drive current. Therefore, the current is evenly distributed across the 12 discrete segments. With each segment increase, the current increases uniformly by approximately 90.91 mA, and objective lens 21 synchronously increases its total maximum travel distance by 1 / 11 along the optical path. This yields the following set of mapping data for segment positions, coordinates, objective lens travel distance, and current values: First position: coordinates (1,1), objective lens zero stroke, current 0.00mA; Second position: coordinates (2,1), objective lens 1 / 11 maximum travel, current 90.91mA; Third position: coordinates (1,2), objective lens 2 / 11 maximum travel, current 181.82mA; Fourth position: coordinates ((2,2), objective lens 3 / 11 maximum stroke, current 272.73mA; Fifth position: coordinates (3,1), objective lens 4 / 11 maximum travel, current 363.64mA; Sixth position: coordinates (1,3), objective lens 5 / 11 maximum travel, current 454.55mA; Seventh position: coordinates (3,2), objective lens 6 / 11 maximum travel, current 545.45mA; Eighth position: coordinates (2,3), objective lens 7 / 11 maximum travel, current 636.36mA; Ninth position: coordinates (1,4), objective lens 8 / 11 maximum travel, current 727.27mA; Tenth position: coordinates (3,3), objective lens 9 / 11 maximum stroke, current 818.18mA; Eleventh segment: coordinates (2,4), objective lens 10 / 11 maximum stroke, current 909.09mA; Twelfth position: coordinates (3,4), objective lens full maximum stroke, current 1000.00mA.

[0035] Specifically, the above mapping relationship is pre-stored in the storage module of the processing unit 5. During device operation, the detection unit 4 identifies the grid where the heat source is located and uploads the corresponding coordinate values. The processing unit 5 retrieves the mapping table to match the corresponding segment current and controls the power supply unit to output the corresponding current to drive the electromagnet, thereby precisely controlling the objective lens 21 to move to the travel position that matches the grid coordinates, completing the targeted focusing monitoring of the heat source target. If the heat source moves across the grid within the monitoring area, the detection unit updates the grid coordinates in real time, and the processing unit synchronously switches the output of the corresponding segment current to continuously drive the objective lens to follow the heat source displacement. When the heat source leaves the monitoring area, the processing unit outputs a 0mA current, and the traction component uses the reset structure to bring the objective lens back to the initial position of the first segment. The above description only uses the monitoring area 200 divided into 4 rows × 3 columns of grid units 201 as an example. The monitoring area 200 of the present invention can also be divided into other embodiments of M rows × N columns of grid units 201, and its working principle is the same as the above 4 rows × 3 columns of grid units 201.

[0036] Continue to combine Figures 1-5As shown, the security monitoring camera device 100 of the present invention achieves tracking and monitoring of heat source targets through closed-loop control of "heat source detection → coordinate feedback → current regulation → objective lens alignment", which has the following positive and beneficial effects: (1) The input current magnitude of the present invention maps the objective lens to multiple segments of movement, so that the drive mechanism 22 drives the objective lens 21 to move through the quantitative change of the input current. Each current value corresponds to a fixed movement stroke of the objective lens 21, which effectively ensures the accurate positioning of the lens 21 and further ensures that the lens 21 can be accurately aligned with the grid unit 201 where the heat source is located. At the same time, this multi-segment mapping relationship between the current magnitude and the movement distance of the objective lens 21 makes the adjustment response speed of the lens 21 fast and accurate, and also avoids the problems of mechanical adjustment such as jamming and offset, thus improving the stability and reliability of lens adjustment. (2) This invention forms a monitoring area 200 by dividing the area of ​​the image that the lens unit 2 can acquire into a grid unit 201 and assigning corresponding coordinate values ​​to the monitoring area 200, thus completing the digital calibration of the physical monitoring area and providing a guarantee for precise control. This breaks through the technical problem of "fuzzy positioning" in existing monitoring equipment. At the same time, this invention constructs a complete closed-loop control of "heat source detection → coordinate feedback → current regulation → objective lens alignment", which can complete the identification, positioning and objective lens 21 adjustment of heat source targets without manual intervention, thereby improving the intelligence and precision of security monitoring. It also ensures the effective tracking and clear recording of abnormal heat source targets. This effectively solves the technical problem that existing traditional monitoring equipment adopts a "panoramic" monitoring mode, which relies on manual screening for the identification of abnormal targets, resulting in low efficiency and easy omission of key information. (3) This invention uses the detection unit 4 to specifically detect heat source targets (such as human bodies, abnormally high-temperature equipment, etc.). Combined with the gridding and coordinate mapping of the monitoring area, it can quickly locate the specific location of the heat source. Then, through the linkage of the processing unit 5 and the drive mechanism 22, it accurately drives the objective lens to align with the target area, realizing "targeted" tracking and monitoring. At the same time, this invention enables the monitoring equipment to actively focus on abnormal heat source targets instead of passively recording panoramic images, significantly improving the effectiveness of monitoring information. It is especially suitable for security scenarios such as parks, warehouses, and residences that are sensitive to personnel intrusion or abnormally high temperatures of equipment.

[0037] Furthermore, the working principle of the image pickup unit 3 involved in this invention is well known to those skilled in the art, and will not be described in detail here.

[0038] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims. Furthermore, the embodiments disclosed above are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the invention. Therefore, equivalent variations made within the scope of the claims are still within the scope of the present invention.

Claims

1. A security monitoring camera device, characterized in that, include: A power supply unit that provides power; The lens unit includes an objective lens and a drive mechanism. The drive mechanism drives the objective lens to move in a multi-stage manner by means of changes in the magnitude of the input current. The multi-stage movement of the objective lens is mapped to the magnitude of the input current. The image pickup unit has a lens unit disposed at the front end of the image pickup unit. The monitored object acquires an image through the lens unit and forms an image in the image pickup unit. The area that the lens unit can capture forms a monitoring area, which is divided into rectangular grid units, each grid unit corresponding to a coordinate value; the change of the coordinate value is mapped to the magnitude of the input current. A detection unit for detecting heat sources, wherein the detection unit detects heat sources entering the grid cell; The processing unit has a pre-stored mapping relationship between the changes in the coordinate values ​​and the magnitude of the input current. The processing unit also has a pre-stored mapping relationship between the multi-segment movement of the objective lens and the magnitude of the input current. The processing unit is communicatively connected to the power supply unit and the detection unit. The detection unit sends the coordinate values ​​of the grid cells corresponding to the detected heat source to the processing unit. The processing unit controls the power supply unit to output the corresponding input current to the drive mechanism according to the mapping relationship between the coordinate values ​​and the input current.

2. The security monitoring camera equipment as described in claim 1, characterized in that, The driving mechanism includes a housing, an electromagnet that generates a magnetic field when energized, and a traction member that can be attracted by the energized electromagnet. The housing has a through-hole for light to enter. The electromagnet is fixed inside the housing and electrically connected to the power supply unit. The objective lens is fixedly connected to the traction member. The traction member is slidably disposed in the optical path channel and located directly in front of the electromagnet. The objective lens is suspended and centrally disposed in the optical path channel by means of the support of the traction member. The electromagnet adjusts the moving distance of the objective lens by varying the magnitude of the input current from the power supply unit.

3. The security monitoring camera equipment as described in claim 2, characterized in that, The traction member always tends to move away from the electromagnet so that the traction member returns to its original position after the electromagnet's attraction to the traction member is removed.

4. The security monitoring camera equipment as described in claim 2, characterized in that, The traction component includes a support portion and a ball bearing that can be attracted by the electromagnet when energized. The support portion is fixedly connected to the objective lens. The objective lens is suspended and centrally positioned in the optical path channel by means of the support portion. The ball bearing is rolled on the support portion. The housing has a groove in which the ball bearing is rolled and received.

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