KR101653743B1 - A surveillance system using a security camera of type hung on a door - Google Patents

A surveillance system using a security camera of type hung on a door Download PDF

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Publication number
KR101653743B1
KR101653743B1 KR1020150149709A KR20150149709A KR101653743B1 KR 101653743 B1 KR101653743 B1 KR 101653743B1 KR 1020150149709 A KR1020150149709 A KR 1020150149709A KR 20150149709 A KR20150149709 A KR 20150149709A KR 101653743 B1 KR101653743 B1 KR 101653743B1
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South Korea
Prior art keywords
camera
door
surveillance
mounting portion
receiver
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KR1020150149709A
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Korean (ko)
Inventor
김재명
유준현
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에스지에이임베디드 주식회사
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Priority to KR1020150149709A priority Critical patent/KR101653743B1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B7/00—Special arrangements or measures in connection with doors or windows
    • E06B7/28—Other arrangements on doors or windows, e.g. door-plates, windows adapted to carry plants, hooks for window cleaners
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q50/00—Information and communication technology [ICT] specially adapted for implementation of business processes of specific business sectors, e.g. utilities or tourism
    • G06Q50/10—Services
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
    • G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
    • G08B13/194—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems
    • G08B13/196—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems using television cameras
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
    • H04N7/181—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a plurality of remote sources

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  • Engineering & Computer Science (AREA)
  • Business, Economics & Management (AREA)
  • Signal Processing (AREA)
  • General Physics & Mathematics (AREA)
  • Tourism & Hospitality (AREA)
  • Computer Security & Cryptography (AREA)
  • Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Economics (AREA)
  • General Health & Medical Sciences (AREA)
  • Strategic Management (AREA)
  • General Business, Economics & Management (AREA)
  • Marketing (AREA)
  • Theoretical Computer Science (AREA)
  • Human Resources & Organizations (AREA)
  • Primary Health Care (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Closed-Circuit Television Systems (AREA)
  • Studio Devices (AREA)
  • Alarm Systems (AREA)

Abstract

A surveillance camera mounted on a door, a surveillance camera connected to a network such as the Internet, interlocked with a smart terminal, detecting an intruder by image recognition, and communicating with the user's smart terminal A surveillance system, comprising: a surveillance camera installed on a door; A receiver for receiving image data from the surveillance camera; And a monitoring server connected to the receiver through a network to receive the image data from the receiver and analyze the image data, wherein the monitoring server registers a unique identification number of the monitoring camera, When receiving a connection request from a smart terminal, a configuration is provided to permit connection of the surveillance camera through authentication of a unique identification number and a password of the surveillance camera.
According to the surveillance system as described above, even if a surveillance camera is purchased and installed in a door, difficulties in installation and setting can be eliminated, so that even a user who does not have knowledge of wiring and network can easily install a stationary door camera, It can respond through smart phone.

Description

[0001] The present invention relates to a surveillance system using a door-mounted camera,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surveillance system using a door-mounted camera in which a door-mounted camera is installed in a door and detects intrusion of an intruder by using the camera.

In addition, the present invention provides a surveillance camera which is installed simply by mounting a surveillance camera on a door, a surveillance camera installed in the surveillance camera is connected to a network such as the Internet and interlocked with the smart terminal, detects an intruder by image recognition, And a surveillance system using a door-mounted camera.

In general, a surveillance camera is installed on a ceiling of a door or on a wall surface next to a door by using a mechanical element such as a screw or a nail [Patent Document 1], and it is difficult for a general person to work directly. Further, when a surveillance camera is installed on the ceiling of a door, there is a problem that a communication line must be additionally installed from the ceiling above the door to a room such as a living room.

Also, in order to connect the surveillance camera to the Internet, a surveillance camera is searched in a local network, an IP address is assigned, and a server environment is set up. However, this kind of work is hardly done by ordinary users, and network engineers are doing a lot of work. Using the surveillance camera that has been installed through such a complicated process, the intruder is detected by image recognition, and the smartphone of the user alerts and responds to the intruder.

In addition, existing video door phones are sometimes used as surveillance cameras [Patent Documents 2, 3, 4]. However, the video door phone should be installed in the inside of the door or on the wall next to the door, and the body of the video door phone or the monitoring device should be constructed by embedding a separate landfill box suitable for each product in the living room wall. Therefore, since the product which does not fit with the landfill box can not be installed, the choice of the consumer is narrow and in the case of the apartment which is not installed, the landfill box portion must be finished.

In addition, when the video door phone is not installed, a door phone is buried in the door, and the resolution of the door phone is too low to analyze the captured image.

Therefore, it is required to develop a surveillance camera that can easily maintain the durability and the airtightness by minimizing the incision area of the door by increasing the convenience for the general public. Moreover, without installing additional communication lines or a separate monitoring device, A technology capable of building a system is required.

[Patent Document 1] Korean Patent Registration No. 10-0671223 (published on January 12, 2007) [Patent Document 2] Korean Published Patent Application No. 10-2015-0048949 (published on May 5, 2015) [Patent Document 3] Korean Published Patent Application No. 10-2009-0020333 (published on February 26, 2009) [Patent Document 4] Korean Patent Registration No. 10-1050823 (issued on July 21, 2011)

SUMMARY OF THE INVENTION The object of the present invention is to solve the above-mentioned problems, and it is an object of the present invention to provide a surveillance camera, which is installed simply by mounting a surveillance camera on a door, And to provide a surveillance system using a door-mounted camera that makes it correspond to a user's smart terminal.

To achieve the above object, the present invention provides a surveillance system using a door-mounted camera, comprising: a surveillance camera installed on a door; A receiver for receiving image data from the surveillance camera; And a monitoring server connected to the receiver through a network to receive the image data from the receiver and analyze the image data, wherein the monitoring server registers a unique identification number of the monitoring camera, And when the connection request is received from the smart terminal, connection of the surveillance camera is allowed through authentication of the unique identification number and the password of the surveillance camera.

The monitoring server may be an external server connected to the Internet or an internal server connected to a LAN connected to the receiver.

Further, in the monitoring system using the door-mounted camera, the surveillance camera and the receiver press a pairing button of the receiver to transmit a predefined set value And are wirelessly connected to each other.

Further, the present invention provides a surveillance system using a door-mounted camera,

A mounting portion including a first mounting portion and a second mounting portion which respectively face the inner surface and the outer surface of the door and extend downward from both sides of the horizontal portion; A communication module formed in the first mounting portion; And a camera module formed on the second mounting portion.

Further, the present invention is characterized in that, in a monitoring system using a door-mounted camera, the upper end of the cradle protrudes from the upper end of the camera module and the communication module.

Further, the present invention is a monitoring system using a door-mounted camera, wherein the first mounting portion, the horizontal portion, and the second mounting portion of the cradle are formed in a right angle channel type.

The present invention is a surveillance system using a door-mounted camera, wherein the camera module and the communication module are formed parallel to each other, and the inner surfaces of the first and second mounting portions are connected to the communication module and the camera module And is on the same plane as the opposing portion.

Further, the present invention provides a surveillance system using a door-mounted camera, wherein the surveillance camera includes: a cradle that extends in one direction and can freely bend along an upper portion of a door to be contacted; A communication module formed on one side of the cradle in the longitudinal direction; And a camera module formed on the other side in the longitudinal direction of the cradle.

Further, in the monitoring system using the door-mounted camera, the present invention is characterized in that magnets are disposed in the communication module facing the door and the camera module.

As described above, according to the surveillance system using the door-mounted camera according to the present invention, even when a surveillance camera is purchased and installed in a door, difficulties in installation and setting can be eliminated, An effect is provided in which a camera can be installed to respond to an intruder occurring in an outdoor area through a smart phone.

Further, according to the monitoring system using the door-mounted camera according to the present invention, since the installation of the communication module and the camera module is completed by simply placing the cradle on the top of the door, the camera assembly can be easily installed on the door, Is obtained.

1 is a block diagram of a surveillance system using a door-mounted camera according to an embodiment of the present invention;
2 is a perspective view of a door-mounted camera according to an embodiment of the present invention;
3 is an external perspective view showing a state in which a door-mounted camera according to the present invention is coupled to a door.
4 is an inner perspective view showing a state in which a door-mounted camera according to the present invention is coupled to a door.
5 is an external perspective view of a door-mounted camera assembly according to a second embodiment of the present invention.
6 is an inner perspective view of a door-mounted camera assembly according to a second embodiment of the present invention.
7 is an external perspective view illustrating a state in which the door-mounted camera assembly according to the second embodiment of the present invention is coupled to a door.
8A and 8B are detailed configuration diagrams of a server and a network of a surveillance system according to an embodiment of the present invention;
9 is a flowchart illustrating a monitoring method of a surveillance system according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings.

In the description of the present invention, the same parts are denoted by the same reference numerals, and repetitive description thereof will be omitted.

First, a configuration of a surveillance system using a door-mounted camera according to an embodiment of the present invention will be described with reference to FIG.

1, a surveillance system using a door-mounted camera according to the present invention includes a surveillance camera 1000 installed on a door, a receiver 700 receiving an image photographed by the surveillance camera 1000 by wireless communication, And a smart terminal 900 receiving the monitoring result through a mobile communication network.

The surveillance camera 1000 includes a camera module 300 mounted on the upper surface of the door 500 for photographing the exterior of the door, a transceiver 210 for transmitting the photographed image, and a battery 220 for supplying power do.

The receiver 700 receives image data through wireless communication with the transceiver 210 of the surveillance camera. Preferably, the receiver 700 and the transceiver 210 transmit and receive data via RF communication or Bluetooth communication.

In addition, the transceiver 210 and the receiver 700 of the surveillance camera are automatically paired and wirelessly connected to each other by predefined set values at the time of factory shipment by pressing a pairing button 710 of the receiver.

The receiver 700 is connected to a surveillance server through an Internet communication network such as a LAN, and the surveillance server receives image data received from the receiver 700. [ The configuration for the monitoring server will be described in more detail below.

That is, when the receiver 700 is connected to the Internet via a LAN, the transceiver 210 and the receiver 700 are wirelessly connected through a pairing function to transmit image data and the like of the camera module 300 The image data may be transmitted to the user's smart terminal 900 through Wi-Fi or data communication (3G / 4G / LTE).

The smart terminal 900 is a mobile terminal having a computing function such as a smart phone, a tablet PC, and a pellet of a user, and receives a monitoring result from a monitoring server. In addition, the smart terminal 900 may include a computing terminal such as a PC or a notebook computer.

Next, the configuration of the surveillance camera 1000 according to the first embodiment of the present invention will be described in more detail with reference to FIG. 2 to FIG.

2, the surveillance camera 1000 according to the present invention includes a horizontal part 110 contacting a top surface of a door 500 and a horizontal part 110 contacting a top surface of the door 500, A cradle 100 including a first mounting portion 120 and a second mounting portion 130 that are opposed to each other and extend downward from both sides of the horizontal portion 110, a communication module 200 formed on the first mounting portion 120, And a camera module 300 formed on the second mounting portion 130. [

With this structure, since the installation of the communication module 200 and the camera module 300 is completed only by placing the cradle 100 on the upper end of the door 500, the camera assembly 1000 ) Can be easily installed to greatly enhance the convenience of installation.

In particular, since the weight of the communication module 200 and the camera module 300 is properly balanced with respect to the door 500, the shake can be minimized even during long-term use, and durability can be maintained.

The communication module 200 and the camera module 300 are connected to the horizontal portion 110 of the door 500 and the upper portion of the door 500, Since the communication module 200 and the camera module 300 are installed in the first mounting portion 120 and the second mounting portion 130 extending downward from the door 110, 600) can be avoided.

The upper end of the cradle 100 may have a shape protruding from the upper ends of the camera module 300 and the communication module 200 so that the camera module 300 and the communication module 200 may interfere with the door frame 600 Can be prevented.

The first mounting part 120, the horizontal part 110 and the second mounting part 130 of the cradle 100 may also be formed in a right angle channel shape when the top end of the door 500 is a right angle channel type, The door 100 can be more compactly coupled to the upper end of the door 500.

The communication module 200 and the camera module 300 are formed parallel to each other and the inner surfaces of the first mounting portion 120 and the second mounting portion 130 are connected to the communication module 200 and the camera module 300 300, the gap between the door 500 and the communication module 200 and the camera module 300 can be minimized, so that a more compact assembly can be achieved.

When a receiving groove (not shown) having a depth corresponding to the thickness of the horizontal part 110 is formed on the upper surface of the door 500 to accommodate the horizontal part 110 of the cradle 100, Can be prevented from moving in the width direction of the door 500.

In addition, a magnet 800 may be disposed on the communication module 200 and the camera module 300 facing the door 500 on both sides.

In this case, when the door 500 is made of a magnetic material such as iron, the communication module 200 and the camera module 300 can be firmly fixed to the door 500 without shaking.

The camera module 300 includes a camera 310, a microphone 320 and a speaker 330. The communication module 200 may include a transceiver 210 and a battery 220. [

The camera 310 collects image information and transmits the image information to the user. The speaker 330 sounds an alarm sound when an intruder is generated, and the user and the person outside the room speak the sound through the microphone 320 and the speaker 330. I can make a call.

Next, the configuration of the surveillance camera 1000 according to the second embodiment of the present invention will be described in more detail with reference to Figs. 5 to 7. Fig.

5 to 7, a door-mounted camera assembly 1000 'according to a second embodiment of the present invention includes a door 500' extending in one direction and freely bendable along an upper portion of a door 500 ' A communication module 200 'formed on one side of the cradle 100' in the longitudinal direction, and a camera module 300 'formed on the other side in the longitudinal direction of the cradle 100' .

Since the cradle 100 'is freely bendable, even if the top shape of the door 500' is irregular, the cradle 100 'can be flexibly deformed and mounted.

The cradle 100 'may be made of rubber, flexible synthetic resin or fiber, and may be composed of a single or a plurality of strands.

In addition, a magnet 800 'may be disposed on the communication module 200' and the camera module 300 'facing both sides of the door 500'.

In this case, when the door 500 'is made of a magnetic material such as iron, the communication module 200' and the camera module 300 'can be firmly fixed to the door 500' without shaking.

The configurations of the communication module 200 'and the camera module 300' are the same as those of the first embodiment, so a detailed description thereof will be omitted.

Next, a server and a network configuration of the surveillance system according to an embodiment of the present invention will be described with reference to FIG.

As shown in FIG. 8A, the receiver 700 is connected to the interunit 12 by a LAN 11. At this time, the receiver 700 automatically registers the unique identification number of the surveillance camera 1000 in the surveillance server 910. Then, the user registers the password corresponding to the unique identification number of the surveillance camera in the surveillance server 910 through the smart terminal 900.

The monitoring server 910 can communicate with the smart terminal 900 of the user through the Internet 12 and the mobile communication network 13. The user connects to the surveillance camera 1000 through authentication of the unique identification number of the surveillance camera 1000 and the password. At this time, the monitoring server 910 links the communication between the surveillance camera 1000 and the smart terminal 900, or the surveillance server 910 directly controls the surveillance camera 1000 and controls the request of the smart terminal 900 And transmits the image data received from the surveillance camera 1000 to the smart terminal 900. The smart terminal 900 receives the image data from the surveillance camera 1000,

The monitoring server 910 receives image data from the receiver 700, analyzes the image data such as face recognition, determines an intruder or a visitor, and transmits the result to the smart terminal 900.

Alternatively, as shown in FIG. 8B, the monitoring server 920 may be directly connected to the LAN 11 as another embodiment. That is, the monitoring server 920 is implemented in a room, a PC installed in a house, a notebook computer, or the like.

Next, a monitoring method by a monitoring system according to an embodiment of the present invention will be described with reference to FIG.

9, when the receiver 700 is connected to a local area network (LAN), the receiver automatically registers 610 the unique identification number of the surveillance camera 1000 in the authentication server 500, A password corresponding to the unique identification number of the surveillance camera 1000 is registered in the surveillance servers 910 and 920 through the terminal 900 in step 620. Thereafter, 630 to the surveillance camera 1000.

If an intruder appears in the outdoor after the installation and setting of the surveillance camera 1000 is completed, if the surveillance camera 1000 is determined to be an intruder through the image analysis 610 of the intruder, (640), an alarm is transmitted to the user smart terminal (900) via the Internet (640), the user views the screen of the smart terminal (900) and reports a report to the police or the like or a voice warning 650).

Although the present invention has been described in detail with reference to the above embodiments, it is needless to say that the present invention is not limited to the above-described embodiments, and various modifications may be made without departing from the spirit of the present invention.

100 ... cradle 110 ... horizontal portion
120 ... first mounting portion 130 ... second mounting portion
200 ... communication module 300 ... camera module
310 ... camera 320 ... microphone
500 ... Door 600 ... Door frame
700 ... receiver 800 ... magnet
900 ... smart terminals 910, 920 ... surveillance server

Claims (9)

A surveillance system using a door-mounted camera,
A surveillance camera installed on a door;
A receiver for receiving image data from the surveillance camera; And
And a monitoring server connected to the receiver through a network and receiving the image data from the receiver and analyzing the image data,
The surveillance server registers a unique identification number of the surveillance camera, and when the surveillance server receives a connection request from the smart terminal of the user, permits connection of the surveillance camera through authentication of the unique identification number and the password of the surveillance camera,
The surveillance camera includes:
A mounting portion including a first mounting portion and a second mounting portion which respectively face the inner surface and the outer surface of the door and extend downward from both sides of the horizontal portion;
A communication module formed in the first mounting portion; And
And a camera module formed on the second mounting portion,
Wherein the first mounting portion of the communication module is extended to the inner surface of the door and the second mounting portion of the camera module is formed of a first mounting portion, And a second door provided on the outer surface of the door,
Wherein the communication module and the receiver are wirelessly connected to each other.
The method according to claim 1,
Wherein the monitoring server is an external server connected to the Internet or an internal server connected to a LAN connected to the receiver.
The method according to claim 1,
Wherein the surveillance camera and the receiver are automatically paired and wirelessly connected to each other according to predefined set values at the time of factory shipment through Frequency-Hopping Spread Spectrum (FHSS) communication when a pairing button of the receiver is pressed. Surveillance system using stationary camera.
delete The method according to claim 1,
Wherein the upper end of the cradle has a shape protruding from an upper end of the camera module and the communication module.
The method according to claim 1,
Wherein the first mounting portion, the horizontal portion, and the second mounting portion of the cradle are formed in a right angle channel type.
The method according to claim 1,
Wherein the camera module and the communication module are formed parallel to each other and the inner surfaces of the first mounting portion and the second mounting portion are flush with the opposing portion of the communication module and the camera module. Surveillance system using camera.
2. The surveillance camera according to claim 1,
A cradle extending in one direction and freely bendable along an upper shape of a door to be contacted;
A communication module formed on one side of the cradle in the longitudinal direction; And
And a camera module formed on the other side in the longitudinal direction of the cradle.
9. The method according to any one of claims 5 to 8,
And a magnet is disposed in the communication module and the camera module facing the door.
KR1020150149709A 2015-10-27 2015-10-27 A surveillance system using a security camera of type hung on a door KR101653743B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118474494A (en) * 2024-05-16 2024-08-09 北京京能国际综合智慧能源有限公司 Unsafe behavior view screen monitoring system of photovoltaic power station

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KR100671223B1 (en) 2005-08-11 2007-01-19 (주)파워텍일렉트로닉스 A infrared outdoor camera of dome type
KR100731188B1 (en) * 2005-03-30 2007-06-22 한국전자금융 주식회사 Security Monitoring System And Method Using The Network Camera
KR20090020333A (en) 2007-08-23 2009-02-26 고려웍스(주) Door supervisory system and door opening/shutting system comprising it
KR101050823B1 (en) 2011-04-04 2011-07-21 주식회사 베스트디지탈 Surveillance device, system and method cooperating with doorphone
KR20120048158A (en) * 2010-11-05 2012-05-15 조희문 Security reinforced door look system and the controlling method thereof
KR20150048949A (en) 2013-10-28 2015-05-08 (주)정직한기술 Door Monitoring System Using Door-Phone

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20060097844A (en) * 2005-03-07 2006-09-18 에스케이 텔레콤주식회사 Method for providing visitor confirmation service using door phone on home network
KR100731188B1 (en) * 2005-03-30 2007-06-22 한국전자금융 주식회사 Security Monitoring System And Method Using The Network Camera
KR100671223B1 (en) 2005-08-11 2007-01-19 (주)파워텍일렉트로닉스 A infrared outdoor camera of dome type
KR20090020333A (en) 2007-08-23 2009-02-26 고려웍스(주) Door supervisory system and door opening/shutting system comprising it
KR20120048158A (en) * 2010-11-05 2012-05-15 조희문 Security reinforced door look system and the controlling method thereof
KR101050823B1 (en) 2011-04-04 2011-07-21 주식회사 베스트디지탈 Surveillance device, system and method cooperating with doorphone
KR20150048949A (en) 2013-10-28 2015-05-08 (주)정직한기술 Door Monitoring System Using Door-Phone

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118474494A (en) * 2024-05-16 2024-08-09 北京京能国际综合智慧能源有限公司 Unsafe behavior view screen monitoring system of photovoltaic power station

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