JP4284128B2 - Security video camera image distribution device for elevators - Google Patents

Description

  The present invention relates to a security video camera image distribution device for elevators, and more particularly to distribution of image data to the outside.

  2. Description of the Related Art Conventionally, there has been a system equipped with a video camera attached to an elevator car for crime prevention and a system for recording an image taken of the car (see, for example, Patent Document 1).

JP-A-7-206302

  Such images in the elevator car are recorded and accumulated. In addition, in order to check the inside of the car from the outside, it is necessary to distribute what goes to the image data recording and storage device from the video camera and connect it to a monitor. could not.

  The present invention has been made to solve the above problems, and an object of the present invention is to provide an elevator video camera image distribution device for elevators that can easily obtain and check image data in a car from outside.

The present invention is a transmitter installed on a car for transmitting image data of an elevator car imaged by a video camera by narrow-area wireless communication, and installed at a position where the transmitter can perform narrow-area wireless communication. A door opening / closing means for opening / closing an elevator car door, comprising: a receiver for performing narrow-area wireless communication with the transmitter; and a buffer for storing and holding image data received by the receiver while being updated. The transmitter or receiver controls the signal to be the above-mentioned communication control signal so that the narrow area wireless communication is performed only for a predetermined period immediately after the door is closed between each door closing of the elevator car. It is in the crime prevention video camera image delivery apparatus for elevators characterized by being made .

  In this invention, the image data of the image inside the elevator car photographed by the video camera on the elevator car is transmitted to a receiver in a machine room or the like by narrow-band wireless communication, and this is stored and held while updating the buffer. By doing so, the image data in the car can be easily obtained outside and can also be distributed.

Embodiment 1 FIG.
FIG. 1 is a diagram showing the configuration of a security video camera image distribution device for elevators according to an embodiment of the present invention. The state in the elevator car 1 is photographed by the video camera 5, and analog image data of the photographed image is sent to the on-car image transmission device 6. The on-car image transmission device 6 receives a door opening / closing signal indicating the opening / closing timing of the door 2 as a communication control signal S from the door control unit 4 that controls the opening / closing of the door 2 by driving the motor 3, for example. Data is sent to the image storage / delivery device 7 by narrow area wireless communication (UHF, VHF, etc.). The image storage / delivery device 7 may be any place where narrow-area wireless communication with the image transmission device 6 on the car can be performed. For example, it is assumed here that the image storage / distribution device 7 is provided in an elevator machine room (not shown). The image storage / delivery device 7 is connected to a network such as a LAN.

  FIG. 2 shows the relationship between the internal configuration of the on-car image transmission device 6 and the image storage / delivery device 7 and the network connected thereto. In FIG. 2, the left side of the wavy line X shows the inside of the building where the elevator video camera image distribution device is located, and the right side shows the outside of the building. The on-cage image transmission device 6 includes an A / D converter 61a and a hard disk memory 61b, an HDD recorder 61 that continuously converts image data from the video camera 5 by analog / digital conversion, and the timing of the door opening / closing signal S Is provided with a transmitter 62 that sends the analog image data distributed in accordance with the wireless communication T through the antenna 62a. The transmitter 62 transmits an image (a still image or an extremely short moving image) for each specific period in the repeated operation of the elevator according to the timing of the door opening / closing signal S. That is, for example, image data of a predetermined period immediately after completion of door closing of the door 2 described later is transmitted. The HDD recorder 61 may not be provided in the present invention.

  The image storage / delivery device 7 performs a narrow area wireless communication T with the transmitter 62, receives the image data transmitted from the transmitter 62 by the antenna 71a, and receives the analog image data received by the receiver 71 as a digital signal. An A / D converter 72 for converting the image data into the image data, and an image buffer 73 with a WWW server function for temporarily storing and holding the image data from the A / D converter 72 while constantly updating the image data. The image buffer 73 with the WWW server function is connected to the Internet 109 via, for example, the PC 103, the LAN 101 in this building to which the access point 105 for a mobile phone, a wireless LAN, and the like is connected, and further via the router 107. Then, an image is distributed in response to a distribution request from the PC 103 or access point 105 connected to the LAN 101 or the PC 111 or access point 113 connected to the Internet 109. Note that the image buffer 63 with WWW server function may be connected to the Internet 109 without going through the LAN 101. In addition, the part shown with the wavy line of the image transmission apparatus 6 on a cage | basket | car and the image storage delivery apparatus 7 is mentioned later.

  FIG. 3 is a functional block diagram of the image buffer 73 with the WWW server function of FIG. The image buffer 73 with a WWW server function includes a buffer function 73a composed of a buffer for temporarily storing and holding a still image or an extremely short moving image, and a WWW server function 73b including an IP address 73ba and a URL setting 73bb. Prepare. Further, a security function 73c based on an ID number or the like is provided as necessary. Note that an extremely short moving image is a moving image having a capacity capable of being distributed by the image buffer 63 with the WWW server function so that the distribution speed does not decrease or the image sharpness does not cause a problem even when there are many distribution requests. It is an image.

  In the present invention, the image data is transmitted from the transmitter 62 of the image transmission device 6 on the car 6 to the receiver 71 of the image storage / delivery device 7 provided in the machine room or the like of the elevator by narrow area wireless communication T. The image data can be easily obtained and confirmed externally. In particular, among the continuous moving images from the video camera 5, a still image or a very short moving image for a specific period in a repetitive operation such as opening / closing of an elevator door is transmitted to the image storage / distribution device 7 side by the narrow area wireless communication T. The image stored at that time is temporarily stored in the image buffer 73 with the WWW server function, and when the distribution request is made via the LAN 101 or the Internet 109, the image held at that time is distributed. . With such a still image or extremely short moving image holding and distribution process, the processing load is small, and even if there are a large number of distribution requests, it can be handled with the above-described inexpensive configuration, and the distribution speed is reduced. There is no problem with the sharpness of the image.

The transmitter 62 of the on-car image transmission device 6 transmits a still image or an extremely short moving image for each specific period in the repeated operation of the elevator by the narrow-band wireless communication T, and the image buffer 73 with a WWW server function always transmits it. Hold temporarily while updating. And elevator car 1 is landed, as shown in FIG. 4 the door 2 is get on and off passengers and door open at time T ₁ and, after the door 2 is closed door at time T _2, the next stop indicated at time T ₅ There is no opening and closing of the door 2 until the door opens on the floor, and no new passengers enter or exit. Accordingly, new image data obtained from, for example, the video camera 5 of a predetermined period indicated by time T _{3 to} T ₄ immediately after completion of the door closing at time T _{2 in} FIG. 4 is transmitted by the narrow-band wireless communication T, and this is provided with the WWW server function The buffer function 73a of the image buffer 73 may be held by always updating the previous one. The predetermined period may be a predetermined period having the same length as times T _{3 to} T ₄ starting from time T ₂ . This timing is obtained by a door opening / closing signal S indicating the opening / closing timing of the door 2 from the door control unit 4 shown in FIG. Note that it takes about 3 seconds until the door control unit 4 issues a door closing command and the door 2 is completely closed. When using a door closing command as the door opening / closing signal S, it is necessary to consider this time lag. In any case, it may be a predetermined period immediately after the door 2 is completely closed.

The operations of the on-car image transmission device 6 and the image storage / delivery device 7 will be described with reference to FIG. Analog image data from the video camera 5 is accumulated in the HDD recorder 61 of the on-car image transmission device 6 while being distributed. The transmitter 62 uses the door opening / closing signal from the door control unit 4 as a communication control signal S. For example, every time during a predetermined period of time T _{3 to} T ₄ immediately after the door 2 shown in FIG. 4 is closed, analog image data (here, still images or very short moving images) from the video camera 5 is stored in the image storage / delivery device 7. To the receiver 71. After this is A / D converted by the A / D converter 72, the previous one already stored in the buffer (73a in FIG. 3) of the image buffer 73 with the WWW server function is updated. Temporarily retained. The held image data is sequentially updated at a timing immediately after the door 2 is closed.

  Accordingly, if the IP address 63ba of the WWW server function 73b of the image buffer 73 with the WWW server function is known, the access points 105 for the PCs 103 and 111, the mobile phone, the wireless LAN, etc. via the LAN 101 and the Internet 109, If an image distribution request is made to the image buffer 73 from 113 (meaning from a mobile phone, a portable information terminal, etc.), the image held in this can be obtained. The image held in the image buffer 73 has an extremely small data capacity compared to, for example, that stored in the HDD recorder 61. Therefore, even if there are a large number of image distribution requests at the same time, the distribution speed is not increased. Can be distributed without lowering the image quality or causing a problem with the sharpness of the image.

  Note that the communication timing of the transmitter 62, that is, the update timing of the content held in the image buffer 73 with the WWW server function is not limited to a predetermined period immediately after the door 2 is closed, but from the predetermined timing every time the other doors 2 are opened and closed. As shown in FIG. 3, the image transmission device 6 on the car is provided with a timer 64 for a predetermined period, and based on this, it communicates for a predetermined period every predetermined period, and transmits image data to the image buffer 73 with the WWW server function. The held image may be updated. However, the predetermined period is a period in which a still image or an extremely short moving image is obtained from the video camera 5.

  In the above description, the communication timing is controlled by inputting the door control signal S from the door control device 4 or the output of the timer 64 to the transmitter 62 of the image transmitting device 6 on the car. 2, these communication control signals S may be input to the receiver 71 of the image storage / delivery device 7 to control the timing of communication on the receiving side (as shown in the image storage / delivery device 7). In this way, narrow-area wireless communication can be performed periodically for a predetermined period, and an updated still image or an extremely short moving image is always held in the image buffer 73 in the same manner. Can be delivered. In this case, if the image storage / delivery device 7 is installed in, for example, a machine room, a door opening / closing signal as the communication control signal S can be easily obtained.

  The image distribution request to the image buffer 73 with the WWW server function is obtained by adding a search menu for obtaining the image information of the elevator monitoring camera to the homepage of the management company of the building with the elevator or the maintenance company of the elevator, for example. (You may apply security) and specify the desired elevator by narrowing down with the building name, unit, etc. in the menu of the elevator monitoring camera as shown in FIG. 5 (a), (b) Thus, the image information in the elevator car may be obtained.

  Further, the image buffer 73 with the WWW server function, if the buffer (buffer function 73a in FIG. 3) receives a distribution request only from a network such as a LAN, the distribution request is sent to the buffer and the image data held therein. The image data buffer with a server function (not shown) including the server function for the connected network distributed according to the above may be used. Alternatively, image data may be obtained by connecting a PC or a portable information terminal directly from the buffer. The image storage / distribution device 7 provided with the image buffer 73 has a high degree of freedom in installation conditions because image data can be received anywhere from the image transmission device 6 on the car where narrow-area wireless communication is possible. Is easy to connect.

  In the above description, the case where the data obtained from the video camera 5 is analog image data has been described. However, when the data obtained from the video camera 5 is digital image data, the A / D converter 61a shown in FIG. , 72 are not necessary, and the narrow-range wireless communication T may be of a system adapted to this.

  According to the present invention, image data obtained from not only an elevator security video camera image delivery apparatus but also a video camera is transmitted by a narrow area wireless communication or the like for a predetermined period of a predetermined period, and stored in a buffer. It can also be applied to general surveillance cameras, and a considerable effect can be obtained.

It is the figure which showed the structure of the crime prevention video camera image delivery apparatus for elevators by one Embodiment of this invention. It is the figure which showed the relationship between the internal structure of the image transmission apparatus on a cage | basket | car of the crime prevention video camera image delivery apparatus for elevators by one embodiment of this invention, an image storage delivery apparatus, and the internet connected to this. It is a function block diagram of the image buffer with a WWW server function of FIG. It is a figure for demonstrating an example of the communication timing of the narrow region radio | wireless communication of FIG. It is a figure which shows an example of the search menu from which the image information of the elevator surveillance camera on a homepage is obtained.

Explanation of symbols

  1 elevator car, 2 doors, 3 motors, 4 door control device, 5 video camera, 6 on-car image transmission device, 7 image storage / delivery device, 61 HDD recorder, 61a, 72 A / D converter, 61b hard disk memory, 62 Transmitter, 62a, 71a Antenna, 64, 74 Timer, 71 Receiver, 73 Image buffer with WWW server function, 73a Buffer function, 73b WWW server function, 73ba IP address, 73bb URL setting, 73c Security function, 101 LAN, 103 , 111 PC, 105, 113 access point, 107 router, 109 Internet, T narrow area wireless communication.

Claims (5)

A transmitter installed on the car that transmits the image data of the elevator car imaged by the video camera by narrow-band wireless communication;
A receiver that is installed at a position where narrow-band wireless communication can be performed with this transmitter and performs narrow-band wireless communication with the transmitter; and
A buffer for storing and holding image data received by the receiver while being updated;
Bei to give a,
The door opening / closing signal indicating the opening / closing of the elevator car door is used as the communication control signal, and the narrow-area wireless communication is performed only for a predetermined period immediately after the door closing operation between the door closing operation of the elevator car. As described above, an elevator security video camera image distribution apparatus in which the transmitter or the receiver is controlled as described above . The elevator security video camera image distribution apparatus according to claim 1, wherein the buffer stores and holds image data of a still image or an extremely short moving image while being updated. The output of the video camera is analog image data, and an A / D converter that performs analog / digital conversion of image data received by the receiver is provided between the receiver and a buffer. The crime prevention video camera image delivery apparatus for elevators according to claim 1 or 2 . 4. The server according to claim 1 , wherein the buffer comprises an image buffer with a server function connected to a network including a server function for distributing the image data held in the buffer in accordance with a distribution request. Security video camera image distribution device for elevators as described in 1. 4. The buffer according to claim 1 , wherein the buffer comprises an image buffer with a WWW server function connected to the Internet including a WWW server function for distributing image data held in the buffer according to a distribution request . The crime prevention video camera image delivery apparatus for elevators according to item 1 .

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