WO2009127087A1 - 可视对讲系统及其门口机 - Google Patents

可视对讲系统及其门口机 Download PDF

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Publication number
WO2009127087A1
WO2009127087A1 PCT/CN2008/000809 CN2008000809W WO2009127087A1 WO 2009127087 A1 WO2009127087 A1 WO 2009127087A1 CN 2008000809 W CN2008000809 W CN 2008000809W WO 2009127087 A1 WO2009127087 A1 WO 2009127087A1
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WO
WIPO (PCT)
Prior art keywords
video
cameras
control circuit
door machine
intercom system
Prior art date
Application number
PCT/CN2008/000809
Other languages
English (en)
French (fr)
Inventor
谢洲云
Original Assignee
Xie Zhouyun
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xie Zhouyun filed Critical Xie Zhouyun
Publication of WO2009127087A1 publication Critical patent/WO2009127087A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00Television systems
    • H04N7/18Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
    • H04N7/183Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a single remote source
    • H04N7/186Video door telephones

Definitions

  • the invention relates to the field of intelligent building access control systems, in particular to a video intercom system and a door O machine.
  • the existing video intercom system generally includes a door machine and a plurality of indoor units, the door machine is provided with a camera device, and the indoor unit is installed in each suite, and is provided with a display device, and is electrically connected with the door, the door machine and the indoor
  • a response circuit composed of a microphone and an earpiece is arranged bidirectionally between the machines. Once the response circuit is turned on, the indoor unit and the door machine can transmit voice data captured by the camera device to the display device of the indoor unit.
  • a door machine is a server
  • indoor money is a terminal.
  • a plurality of indoor units and a door machine are installed in a building to form a visual intercom access control system.
  • the traditional door-to-door camera uses only one camera, and the effective shooting range of a single camera is limited.
  • the camera cannot cover all areas outside the door, and there is a monitoring blind zone.
  • the intent of the crime is easy to hide and not easy to be discovered, or the indoor unit user cannot understand the situation around the gate, which causes inconvenience.
  • a wide-angle lens can be used instead of a normal camera, which can obtain a wider field of view, but undoubtedly increases the cost of the device, and the expanded viewing angle is limited, and the effect is poor, so it cannot be smoothly promoted in practice. It is inconvenient to turn the camera manually, and so on.
  • the conventional camera device of the door machine has the disadvantage of narrow viewing angle, which in turn reduces the security and theft prevention performance of the access control system itself.
  • the object of the present invention is to overcome the above-mentioned deficiencies, and to provide a visual intercom system and a door machine thereof, which can detect the blind spot of the video intercom system and improve the visual range with relatively controllable cost and simple technical structure. Thereby improving the security of the video intercom system.
  • the video intercom system door machine of the present invention comprises a casing and an image pickup device installed in the casing for photographing the peripheral landscape of the casing, and a control circuit in the casing, wherein the control circuit provides the video data obtained by the camera device to be transmitted to the a video interface of a display device of an intercom system indoor unit, the camera device comprising a video processing unit and at least two cameras, each camera being distributed on the housing, and the video processing unit processing video data of the plurality of cameras A single video data is supplied to the control circuit via the video interface.
  • the video processing unit only turns on the connection path of one of the cameras and the control circuit at the same time, and automatically switches to another camera and the control circuit after a predetermined time slot.
  • the connection path is switched in turn to form a single video data for control circuit output.
  • the video processing unit includes at least two switch circuits, each of which is electrically connected to a camera and controlled by the control circuit.
  • the video processing unit superimposes the overlapping portions of the image content obtained by each camera, and integrates the video data of the independent and narrow viewing angles of the plurality of cameras into a uniform image through image processing. Wide viewing angle of video data to form a single video data for control circuit output.
  • the video processing unit includes a plurality of switch circuits electrically connected to the cameras in a one-to-one correspondence, and each switch circuit switches itself by an external control signal received and forwarded by the control circuit.
  • the external control signal is triggered by any one of the indoor units that is electrically connected to the door.
  • the camera is disposed on the front side of the casing, preferably, it can be implemented in the following three ways:
  • At least two of said cameras are arranged on two opposite edges of the front side of the housing.
  • At least two of said cameras are arranged at two opposite angular positions on the front side of the housing.
  • a plurality of said cameras are arranged in a straight line on the front side of the housing.
  • the video intercom system of the invention comprises a door machine and an indoor unit, and a door machine to a plurality of rooms
  • the internal machine realizes the visual access control function of the building, and the door machine adopts the above-mentioned door machine of the invention.
  • the present invention has the following advantages: By adding the camera, the viewing angle of the door machine can be enlarged, the monitoring blind zone can be swept, thereby improving the security of the access control system, and the structure of the invention is relatively simple and the cost is relatively low.
  • FIG. 1 is a schematic block diagram of a video intercom system of the present invention
  • 1 is a more detailed block diagram of the connection with the camera device in the door-to-door system of the video intercom system of the present invention
  • FIG. 3 is a circuit schematic diagram of the door machine of the present invention.
  • FIG. 4 is a perspective view showing the physical structure of the door machine of the present invention. detailed description
  • the video intercom system of the present invention includes at least a plurality of functional modules as shown in the block diagram of FIG. In Fig. 1, the indoor unit 1 and the door machine 2 are included, and the video and audio data communication between the indoor unit 1 and the door unit 2 facilitates mutual understanding between the resident and the visitor, thereby achieving the purpose of security and theft prevention.
  • the indoor unit 1 in the video intercom system includes at least a control circuit 10, a display device 11, an audio device 12, a video interface 14, an audio interface 13, and a control interface 15.
  • the control circuit 10 mainly adopts a control chip (not shown) such as a single chip microcomputer in combination with other electronic component device circuits, and can realize integrated management of the indoor unit after programming.
  • the display device adopts an LCD display screen for reducing the video data transmitted through the video interface 14 of the indoor unit 1 into an image, and assisting in displaying the running state of the whole machine, the parameter setting process, etc., and the specific function is based on the single chip of the control circuit 10 Depending on the program settings.
  • the audio device 12 is mainly used for the interaction of the audio data with the door machine 2, similar to a telephone, and is not described in the prior art.
  • the video interface 14 and the audio interface 13 of the indoor unit 1 are respectively used for receiving video data and bidirectionally transmitting audio data, and the control interface 10 is for implementing control type signal interaction with the control interface 25 of the outside machine 2.
  • the door machine 2 includes a control circuit 20, an imaging device 26, an audio device 22, a video interface 24, an audio interface 23, and a control interface 25.
  • the control circuit 20 of the door machine 2 is The MCU chip (refer to the HT48R06 of FIG. 3) can be programmed to realize the whole machine management of the door machine 2, and coordinate the data exchange process between the door machine 2 as the server and the indoor unit 1 as the terminal, specifically through the indoor unit 1 and The preset program in the respective single chip of the door machine 2 is realized.
  • the camera device 26 is used for photographing the landscape around the doorway, and then converting such optical information into electronic video data, which is managed by the preset program of the single chip of the door machine 2 control circuit 20, and transmitted to the indoor unit through the video interface of the door machine 2 1.
  • the control circuit 10 of the indoor unit 1 receives the video data of the door machine 2 via its video interface 24, it outputs a display to its display device 21.
  • the audio device 22 of the door machine 2 has the same function as the audio device 12 of the indoor unit 1, and the two can cooperate with each other through the respective audio interfaces 23 and 13 to implement data interaction.
  • the video interfaces 14, 24, the audio interfaces 13, 23 and the control interfaces 15, 25 of the indoor unit 1 and the door machine 2 are unified into the same hardware interface (not shown), and twisted pairs (not shown) are used. Cables such as the same can be used to transmit different types of data by using different pairs of core wires, or to perform audio, video, control, and signal transmission multiplexing in a limited pair of core wires, and the door machine 2 and the indoor unit can also be realized. 1 data transmission. For the same reason, it also includes the way of transmitting wirelessly.
  • control interface 25 of the door machine 2 For some signals such as those triggered by the door unlock button (not shown) of the indoor unit 1 and the function buttons for calling the indoor unit 1 in the door machine 2 (refer to K1 in Fig. 3), etc., It is transmitted to the control interface 25 of the door machine 2 through the control interface 15 of the indoor unit 1. Therefore, the control interfaces 15 and 25 are, in a sense, an instruction transmission link, although not strictly necessary, but have the necessity of independent transmission. . Since the improvement of the present invention is mainly aimed at the improvement of the video function, for the other other technologies, please refer to the related well-known technology, and the following will not be mentioned.
  • the camera device 26 further includes a video processing unit 261 and at least three cameras 2621, 2622, 2623, each camera 2621, 2622, 2623 can independently shoot a certain The landscape within the angle range, and the video processing unit includes three switch circuits (refer to FIG. 3, the same below), and the switch circuit is implemented by a triode circuit, and each of the cameras 2621, 2622, 2623 and one of the switch circuits are described. The electrical connection is made, and the switch circuit is electrically connected to the control circuit 20.
  • the program for causing the video processing unit 261 to output a single video data is preset in the single chip HT48R06 of the control circuit 20.
  • the so-called single video data refers to the independent video data of the plurality of cameras 2621, 2622, 2623, or is processed by video.
  • the unit 261 outputs one by one, or is subjected to an image processing operation by a program carried in the video processing unit 261 to form a single image and then output.
  • the three triode switches of the video processing unit 261 are respectively connected with three cameras (see 2621, 2622, 2623 in FIG. 2), and respectively controlled by Ql l, Q13 and Q15.
  • the port of the single chip chip HT48R06 of the circuit 20 is connected, and an electric signal is alternately transmitted by the single chip HT48R06, so that the corresponding switch circuit in the video processing unit 261 can be turned on.
  • the camera connected to the switch circuit also follows After the activation, the corresponding video data can be displayed under the control of the control circuit 20 and transmitted to the display device of the indoor unit via the video interface (refer to FIG. 2) (refer to FIG. 1).
  • the switch circuit in which Q11, Q13 and Q15 are located in FIG. 3 can be transmitted to the indoor unit via the control interface between the door machine and the indoor unit, and indoors.
  • a corresponding switch (set) is set on the machine, and the switch (set) can selectively trigger a switch circuit in the video processing unit of the door machine to activate a camera.
  • the indoor device user can select indoors.
  • the selection of the camera is performed so that the content of the designated area can be selectively viewed.
  • the video processing unit can be replaced by a dedicated single chip chip, or the video processing unit can be directly integrated into the single chip of the control circuit in the form of a program, and each camera is Corresponding to the corresponding port used by the video processing unit, after the door machine calls the indoor unit and establishes a connection path, each camera is simultaneously started under the control of the chip, and the program preloaded by the chip reads each video of each camera. After the data is processed, the image processing operation is performed on the plurality of video data, and the overlapping regions of the images corresponding to the plurality of narrow-view video data are superimposed, connected, scaled, etc., and then unified into a single video image with a wider viewing angle.
  • the door machine 2 is packaged by a casing (31 and 32, the same below), and the casing is divided into a front casing 31 and a rear casing 32 which are mutually fitted, and the front casing 31 is provided.
  • the main through hole 311 and the two smaller sub-through holes 312 which are separated from the lower sides of the front case 31 of FIG. 4, thereby forming the cavity formed by the front case 31 and the rear case 32, as shown in FIG.
  • the whole circuit of the door machine 2 is integrated on a PCB circuit board 4 and installed in the cavity.
  • the three cameras 2621, 2622 (not shown in Fig. 4 of Fig. 2), Here, the main camera 2621 which is relatively powerful and bulky is selected, and the main through hole 311 of the front case 31 is installed and fixed. Similarly, the two sub-cameras 2622 also pass through the lens platen 2632 and the front end baffle. 2631 is respectively provided on the back surface of the front case 31 corresponding to the two sub-through holes 2622 (only one side of which is shown in FIG. 4). Regarding the physical position and physical structure relationship of other components of the door machine, it is a well-known technique and can be flexibly set in each advantageous part of the door machine, and therefore will not be described.
  • the number of the cameras included in the above embodiment is limited to three, and the positional arrangement relationship of the plurality of cameras can also be flexibly set, such as placing a camera in the casing.
  • the other cameras are linearly arranged with the former, and may be arranged in a triangular shape as in the above embodiment, or may be arranged in the middle of the ice, or may be arranged along the diagonal of the casing.
  • the present invention enhances the anti-theft function of the door-to-door machine of the video intercom system with a simple technology, further satisfies the user's demand for a wider visual field, and is beneficial to the further popularization of the video intercom system.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Closed-Circuit Television Systems (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)

Description

可 讲系统及其门口机 技术领域
本发明涉及智能楼宇门禁系统领域, 尤其涉及一种可视对讲系统及其门 O机。 技术背景
随着技术的发展, 门禁系统已逐步进入可视对讲时代, 可视对讲系统的 应用也越来越普遍。
现有的可视对讲系统一般包括一个门口机和多个室内机, 门口机设有摄 像装置, 室内机装设于各套房内, 设有显示装置, 与门口机电性连接, 门口 机与室内机之间双向设有麦克风和听筒构成的应答电路,一旦应答电路接通, 室内机和门口机除了可以进行语音通信外, 门口机还将摄像装置所拍摄的视 频数据传输至室内机的显示装置完成至少单向的图像通信, 如此, 门口机和 室内机实现了音频上的双向通信和视频上的单向通信, 一旦室内机使用者通 过视频和音频确认了来访者的身份, 通过接通室内机的门口开锁按钮发送信 号至门口机, 门口机便可控制门锁打开, 完成交互程序。 一个门口机就是一 部服务器, 而室内机财为终端, 多个室内机与一个门口机装设于一幢大厦中 便形成一个可视对讲门禁系统。
可视对讲系统的应用已经非常广泛, 相关的专利技术也多见于各国的专 利文献中, 包含本申请人的相关专利在内, 因而在此处仅做简单介绍。
传统的门口机的摄像装置, 仅使用一个摄像机, 而单个摄像机的有效拍 摄范围是有限的, 门口机安装于在大门上时, 摄像机无法覆盖门外的所有区 域, 存在监控盲区, 由此使有作案意图者便于藏匿而不易被发现, 或者令室 内机使用者无法了解大门外周边情况, 由此造成不便。 实践中可使用广角镜 头代替普通的摄像机, 这样可以获得更广阔的视野, 但无疑也增加了设备成 本, 且所扩大的视角也有限, 效果不良, 因此, 并不能在实践中顺利推广。 而手动转动摄像机又不便操作, 等等。
由此, 传统的门口机的摄像装置存在视角较窄的缺点, 继而也降低了门 禁系统本身的安全防盗性能。
1
确认本 发明内容
本发明的目的就是要克服上述不足,提供一种可视对讲系统及其门口机, 以相对可控的成本、 简单的技术构造, 扫除可视对讲系统的监控盲区, 提高 可视范围, 从而提升可视对讲系统的安全性。
为实现该目的, 本发明采用如下技术方案:
本发明可视对讲系统门口机, 包括壳体和装设在壳体内用于拍摄壳体外 围景观的摄像装置, 以及壳体内的控制电路, 控制电路提供将摄像装置所获 得的视频数据传输至可视对讲系统室内机的显示装置的视频接口, 所述摄像 装置包括视频处理单元和至少两个摄像机, 各摄像机在所述壳体上呈分散设 置, 视频处理单元将多个摄像机的视频数据处理为单一的视频数据供控制电 路经所述视频接口输出。
根据本发明的一种实施例, 所述视频处理单元, 在同一时刻仅接通其中 一个摄像机与控制电路的连接通路, 间隔一预设的时隙后自动切换到接通另 一个摄像机与控制电路的连接通路, 以此轮流切换形成单一的视频数据供控 制电路输出。 具体的, 所述视频处理单元包括至少两个开关电路, 每个开关 电路均与一个摄像机电性连接, 并受控制电路控制导通与否。
根据本发明的另一种实施例, 所述视频处理单元, 对各摄像机所获得的 图像内容重叠部分进行叠加, 将多个摄像机的独立且窄视角的视频数据通过 图像处理后整合为统一的更宽视角的视频数据, 以此形成单一的视频数据供 控制电路输出。
根据本发明的再一种实施例, 所述视频处理单元包括多个与各摄像机一 一对应电性连接的开关电路, 各开关电路藉由控制电路接收并转发来的一个 外部控制信号, 切换自身导通与否的状态。 较佳的, 所述外部控制信号由与 本门口机电性连接的任意一个室内机触发。
关于摄像机在壳体正面的布设方式, 优选地, 可以采取如下三种方式实 现:
1、 至少有两个所述的摄像机布置于所述壳体正面的两个相对边缘。
2、 至少有两个所述的摄像机布置所述壳体正面的两个相对角位。
3、 多个所述的摄像机在壳体正面呈直线布置。
本发明的可视对讲系统, 包括门口机和室内机, 以一个门口机对多个室 内机实现楼宇可视门禁功能, 其门口机采用本发明上述的门口机。 与现有技术相比, 本发明具备如下优点: 通过增设所述摄像机, 可以扩 大门口机的可视角度, 扫除监视盲区, 从而提高门禁系统的安全性, 而且, 本发明结构相对简单, 成本相对低廉。 附图说明
图 1为本发明可视对讲系统的原理框图;
图 1为本发明可视对讲系统门口机中关于与摄像装置连接的更具体的原 理框图;
图 3为本发明门口机的电路原理图;
图 4为本发明门口机的物理结构立体图。 具体实施方式
下面结合附图和实施例对本发明作进一步的说明:
本发明的可视对讲系统,至少包括如图 1原理框图所示的多个功能模块。 图 1中, 包括室内机 1和门口机 2, 通过室内机 1和门口机 2之间的视频和 音频数据通信,便于住户与访客之间的相互了解,从而达到安全防盗的目的。
可视对讲系统中的室内机 1至少包括控制电路 10、显示装置 11、音频装 置 12、 视频接口 14、 音频接口 13以及控制接口 15。
控制电路 10主要采用单片机之类的控制芯片(未图示)结合其它电子元 器件电路实现, 经编程后可实现对室内机整机进行综合管理。
而显示装置采用 LCD显示屏, 用于将通过室内机 1的视频接口 14传输 来的视频数据还原成图像, 以及协助显示整机运行状态、 参数设置过程等, 具体功能根据控制电路 10中单片机芯片的程序设置而定。
音频装置 12则主要用于与门口机 2进行音频数据的交互, 类似于电话, 因属公知技术, 不行赘述。
所述室内机 1的视频接口 14和音频接口 13, 分别用于接收视频数据和 双向传输音频数据, 而控制接口 10则用于与门外机 2的控制接口 25实现控 制类信号的交互。
相应地, 门口机 2包括控制电路 20、 摄像装置 26、 音频装置 22、 视频 接口 24、 音频接口 23以及控制接口 25 , 同理, 门口机 2的控制电路 20采用 单片机芯片 (参阅图 3的 HT48R06 )进行编程后可实现对门口机 2的整机管 理, 以及协调门口机 2作为服务器与作为终端的室内机 1之间的数据交互过 程, 具体通过室内机 1与门口机 2各自的单片机芯片中预设程序实现。
摄像装置 26用于拍摄门口周围的景观,然后将这类光信息转换成电子视 频数据, 由门口机 2控制电路 20的单片机芯片预设的程序管理, 经门口机 2 的视频接口传输至室内机 1, 室内机 1的控制电路 10经其视频接口 24接收 到门口机 2的视频数据后, .向其显示装置 21输出显示。
门口机 2的音频装置 22与室内机 1的音频装置 12功能相同, 两者通过 各自的音频接口 23和 13相配合能实现数据交互。
实践中, 室内机 1与门口机 2各自的视频接口 14、 24、 音频接口 13、 23 以及控制接口 15、 25均统一为同一硬件接口 (未图示), 采用双绞线 (未图 示)之类的线缆并通过使用不同对芯线传输不同类型的数据, 或者, 在有限 对芯线中进行音频、 视频、 控制,信号传输时的复用, 而同样可实现门口机 2 和室内机 1的数据传输。 同理, 也包括以无线进行传输的方式在内。
对于一些诸如由室内机 1的门口开锁按鈕(未图示)触发的信号, 以及 门口机 2中对室内机 1进行呼叫的功能按钮(参阅图 3中 K1所示)等触发 的信号, 均可通过所述室内机 1 的控制接口 15传输至门口机 2的控制接口 25 , 因此, 控制接口 15和 25, 某种意义上为指令传输链路, 虽非严格必须, 但有其独立传输的必要。因为本发明的改进主要在于针对视频功能上的改进, 因此, 对此外的其它技术, 请参阅相关的公知技术, 以下将不行赞述。
在图 2所示的门口机的更具体的原理框图中,所述摄像装置 26还包括视 频处理单元 261和至少三个摄像机 2621 , 2622, 2623,每个摄像机 2621, 2622, 2623能独立拍摄一定角度范围内的景观, 而该视频处理单元则包括三个开关 电路(参阅图 3,下同),开关电路采用三极管电路实现即可,每个摄像机 2621 , 2622, 2623与一个所述的开关电路电性连接, 开关电路则与控制电路 20电 性连接。
控制电路 20的单片机芯片 HT48R06中预设了使视频处理单元 261输出 单一视频数据的程序,所谓单一视频数据,是指所述多个摄像机 2621 , 2622, 2623各自独立的视频数据, 或被视频处理单元 261择一地输出 , 或被视频处 理单元 261内载的程序进行图像处理运算后形成一幅单一的图像后再输出。 在本实施例中, 由于采用了所述开关电路,故而可通过所述控制电路 20的单 片机芯片 HT48R06预载的程序, 以时间轮片的方式,依次逐个接通一个摄像 机与控制电路 20中单片机芯片 HT48R06的连接通路, 使多个摄像机 2621, 2622, 2623中的图像实现轮流切换输出。
具体请参阅图 3所示的电路图, 图 3中, 视频处理单元 261的 3个三极 管开关分别连接 3个摄像机(参阅图 2中 2621, 2622, 2623 ), 以 Ql l、 Q13 和 Q15分别与控制电路 20的单片机芯片 HT48R06的端口连接, 通过该单片 机芯片 HT48R06轮流择一地发送一个电信号,可使视频处理单元 261中的相 应的开关电路导通, 此时, 与开关电路连接的摄像机也随之启动, 相应的视 频数据便可在控制电路 20的控制下, 经视频接口 (参阅图 2 )传输至室内机 的显示装置 (参阅图 1 )进行显示。
在另一种未图示的改进方式中, 可以将图 3中的 Qll、 Q13和 Q15所在 的开关电路通过门口机和室内机之间的控制接口, 经线缆传输至室内机中, 在室内机上设置相应的切换开关(集), 该切换开关(集)可以择一地触发门 口机视频处理单元中的一个开关电路从而启动一个摄像机, 以这样的方式, 方便室内机使用者在室内有选择地进行摄像机的选择, 从而可以有选择性地 查看指定区域的内容。
在一种更为高端的改进方式中, 未图示, 所述视频处理单元可以替换为 专用的单片机芯片, 或者将视频处理单元以程序的形式直接集成到控制电路 的单片机芯片上, 各个摄像机均与该视频处理单元所采用的相应端口电性连 接, 在门口机呼叫室内机并建立连接通路后, 各摄像机在该芯片的控制下同 时启动, 该芯片预载的程序读取各摄像机的各个视频数据后, 对多个视频数 据进行图像处理运算, 将多个窄视角的视频数据所对应的图像的重叠区域部 分进行叠加、 连接、 缩放等处理后, 统一成单一的更宽视角的视频数据, 然 后在控制电路的控制下经视频接口传输至室内机。 在这种方式中, 对控制电 路和视频处理单元的芯片配置以及编程技术都提出了更高的要求, 相对于前 述的两种方式, 可能导致成本的相对增加。
通过以上三种实施方式, 均可克服传统技术的不足, 达到门口机具有更 宽视野的目的。
请参阅图 4, 在物理连接结构上, 门口机 2由一壳体(31和 32, 下同) 封装, 壳体分为相互配合装设的前壳 31和后壳 32, 前壳 31上设有三处通孔 (仅示出两处, 标号为 311 , 312 ), 分别为处于图 4前壳 31上部正中部位的 主通孔 311和分居于图 4前壳 31下部两侧的两个较小的副通孔 312, 由此, 在前壳 31和后壳 32装设后所形成的腔体中, 如图 3所示的门口机 2的整机 电路集成在一块 PCB线路板 4上后装设在该腔体中,所述的三个摄像机 2621, 2622 (图 2的 2623在图 4中未示出), 在此处选用功能相对强大且体积较大 的主摄像机 2621 , 对应前壳 31的主通孔 311装设并予以固定, 同理, 所述 两个副摄像机 2622也通过镜头压板 2632和前端挡板 2631分别对应所述两个 副通孔 2622 (图 4中仅示出一侧的结构)装设在前壳 31的背面上。 关于门 口机的其它部件的物理位置及物理结构关系, 因属公知技术, 且可灵活设置 在门口机的各个有利部位, 因此不行赘述。
本发明中, 所使用的摄像机至少两个以上, 但不受上述实施例中包含数 量为三个的局限, 而多个摄像机的位置布设关系也可灵活设定, 如将一个摄 像机置于壳体的正中部位, 其它摄像机与前者直线排开, 可以如上述实施例 中呈三角形排布, 也可呈氷平正中排布, 还可沿壳体的对角线排布等等。 本 领域普通技术人员应可知晓此等变化。
综上所述, 本发明以简便的技术, 增强了可视对讲系统的门口机的防盗 功能, 进一步满足用户对更宽可视视野的需求, 有利于可视对讲系统的进一 步普及。
上述实施例为本发明较佳的实施方式, 但本发明的实施方式并不仅仅受 上述实施例的限制, 其他的任何未背离本发明的精神实盾与原理下所作的改 变、 修饰、 替代、 组合、 简化, 均应为等效的置换方式, 都包含在本发明的 保护范围之内。

Claims

权利要求书
1、 一种可视对讲系统门口机, 包括壳体和装设在壳体内用于拍摄壳体 外围景观的摄像装置, 以及壳体内的控制电路, 控制电路提供将摄像装置所 获得的视频数据传输至可视对讲系统室内机的显示装置的视频接口 , 其特征 在于: 所述摄像装置包括视频处理单元和至少两个摄像机, 各摄像机在所述 壳体上呈分散设置, 视频处理单元将多个摄像机的视频数据处理为单一的视 频数据供控制电路经所述视频接口输出。
2、 根据权利要求 1 所述的可视对讲系统门口机, 其特征在于: 所述视 频处理单元, 在同一时刻仅接通其中一个摄像机与控制电路的连接通路, 间 隔一预设的时隙后自动切换到接通另一个摄像机与控制电路的连接通路, 以 此轮流切换形成单一的视频数据供控制电路输出。
3、 根据权利要求 2 所述的可视对讲系统门口机, 其特征在于: 所述视 频处理单元包括至少两个开关电路,每个开关电路均与一个摄像机电性连接, 并受控制电路控制导通与否。
4、 根据权利要求 1 所述的可视对讲系统门口机, 其特征在于: 所述视 频处理单元, 对各摄像机所获得的图像内容重叠部分进行叠加, 将多个摄像 机的独立且窄视角的视频数据通过图像处理后整合为统一的更宽视角的视频 数据, 以此形成单一的视频数据供控制电路输出。
5、 根据权利要求 1 所述的可枧对讲系统门口机, 其特征在于: 所述视 频处理单元包括多个与各摄像机——对应电性连接的开关电路, 各开关电路 藉由控制电路接收并转发来的一个外部控制信号,切换自身导通与否的状态。
6、 根据权利要求 5 所述的可视对讲系统门口机, 其特征在于: 所述外 部控制信号由与本门口机电性连接的任意一个室内机触发。
7、 根据权利要求 1至 6中任意一项所述的可视对讲系统门口机, 其特 征在于: 至少有两个所述的摄像机布置于所述壳体正面的两个相对边缘。
8、 根据权利要求 1 至 6中任意一项所述的可视对讲系统门口机, 其特 征在于: 至少有两个所述的摄像机布置于所述壳体正面的两个相对角位。
9、 根据权利要求 1 至 6中任意一项所述的可视对讲系统门口机, 其特 征在于: 多个所述的摄像机在壳体正面呈直线布置。
10、 一种可视对讲系统, 包括门口机和室内机, 以一个门口机对多个室 内机实现楼宇可视门禁功能, 其特征在于: 所述门口机采用如权利要求 1至 中任意一项所述的门口机。
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