KR102455503B1 - Door-Cam comprising buffer - Google Patents

Abstract

The door cam according to an embodiment of the present invention includes an imaging unit, a motion detection sensor for detecting motion, a processing unit for converting the imaging unit to an operation mode using the motion detection information detected by the motion detection sensor, and the imaging unit taking a picture. a communication unit for transmitting an image to the outside, and a buffer for storing the image photographed by the imaging unit, wherein the processing unit stores the first image photographed by the imaging unit according to the motion detection information in the buffer, and When the motion detection information satisfies a predetermined condition, the communication unit is switched to an operation mode to transmit the second image captured by the imaging unit to the outside.

Description

Door-Cam comprising buffer

The present invention relates to a door cam, and more particularly, to a door cam operating at low power using a buffer.

When someone visited the entrance in an apartment, office or house, it was possible to check who came from inside the entrance through the home network system.

In order to prevent this, the demand for a door cam capable of monitoring the front of the front door by photographing the front door is increasing. When the door cam is operated by a battery, there is a limit to the application of the configuration for monitoring according to the limit of battery power. In particular, a lot of power is required when shooting or transmitting an image to the outside, and a technology capable of reducing unnecessary power consumption is required.

The technical problem to be solved by the present invention is to provide a door cam, a monitoring system, and a door cam control method that operate at low power using a buffer.

In order to solve the above technical problem, a door cam according to an embodiment of the present invention includes an imaging unit; a motion sensor for detecting motion; a processing unit for switching the imaging unit to an operation mode by using the motion detection information detected by the motion detection sensor; a communication unit for transmitting the image captured by the imaging unit to the outside; and a buffer for storing the image photographed by the imaging unit, wherein the processing unit stores the first image photographed by the imaging unit in the buffer according to the motion detection information, and the motion detection information satisfies a predetermined condition In this case, it is characterized in that the communication unit is switched to the operation mode to transmit the second image photographed by the imaging unit to the outside.

Also, the second image may be an image currently captured by the imaging unit, and the processing unit may transmit the first image stored in the buffer after transmitting the second image.

In addition, the processing unit may switch the communication unit from the sleep mode to the operation mode when the motion detected by the motion sensor continues for a predetermined time or more.

Also, the processing unit may control the imaging unit or the communication unit in a cut-off mode for cutting off power supply, a sleep mode for supplying standby power, or an operation mode for supplying power.

Also, the first image may be an image or a still image having a first resolution, and the second image may be an image having a second resolution.

In addition, the processing unit controls the imaging unit to switch to a first operation mode to capture the first image when an initial motion is detected, and switches the imaging unit to a second operation mode when the motion detection information satisfies the condition The second image may be controlled to be photographed.

In addition, the power supplied to the imaging unit in the first operation mode may be smaller than the power supplied to the imaging unit in the second operation mode.

In order to solve the above technical problem, the monitoring system according to an embodiment of the present invention is a door cam according to an embodiment of the present invention; a user terminal for receiving an image from the door cam; and a server for receiving an image from the door cam and monitoring the corresponding area.

In order to solve the above technical problem, a door cam control method according to an embodiment of the present invention includes: detecting a motion by a motion sensor; switching the imaging unit to an operation mode when the motion is detected; storing the first image captured by the imaging unit in a buffer; determining whether the motion detection information for detecting the motion satisfies a predetermined condition; switching the communication unit to an operation mode when the motion detection information satisfies the condition; and transmitting, by the communication unit, the second image captured by the imaging unit to the outside.

The method may further include transmitting the first image stored in the buffer after transmitting the second image.

In addition, the imaging unit is switched to a first operation mode when an initial motion is detected to photograph the first image, and when the motion detection information satisfies the condition, is switched to a second operation mode to photograph the second image, The power supplied to the imaging unit in the first operation mode is smaller than the power supplied to the imaging unit in the second operation mode, the first image is an image or a still image having a first resolution, and the second image may be an image having a second resolution.

According to embodiments of the present invention, a low-power operation is possible by efficiently operating in an operation mode only when the imaging unit needs to take a picture and when an image needs to be transmitted.

1 is a block diagram of a door cam according to an embodiment of the present invention.
2 and 3 are diagrams for explaining the operation of the door cam according to an embodiment of the present invention.
4 is a block diagram of a door cam according to another embodiment of the present invention.
5 and 6 are views for explaining the operation of the door cam according to another embodiment of the present invention.
7 is a block diagram of a door cam according to another embodiment of the present invention.
8 and 10 are views for explaining the operation of the door cam according to another embodiment of the present invention.
11 is a block diagram of a monitoring system according to an embodiment of the present invention.
12 to 14 are flowcharts of a door cam control method according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

However, the technical spirit of the present invention is not limited to some embodiments described, but may be implemented in various different forms, and within the scope of the technical spirit of the present invention, one or more of the components may be selected between the embodiments. It can be used by combining or substituted with

In addition, terms (including technical and scientific terms) used in the embodiments of the present invention may be generally understood by those of ordinary skill in the art to which the present invention pertains, unless specifically defined and described explicitly. It may be interpreted as a meaning, and generally used terms such as terms defined in advance may be interpreted in consideration of the contextual meaning of the related art.

In addition, the terms used in the embodiments of the present invention are for describing the embodiments and are not intended to limit the present invention.

In this specification, the singular form may also include the plural form unless otherwise specified in the phrase, and when it is described as "at least one (or one or more) of A and (and) B, C", it is combined with A, B, C It may include one or more of all possible combinations.

In addition, in describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the component from other components, and are not limited to the essence, order, or order of the component by the term.

And, when it is described that a component is 'connected', 'coupled', or 'connected' to another component, the component is directly 'connected', 'coupled', or 'connected' to the other component. In addition to the case, it may include a case of 'connected', 'coupled', or 'connected' by another element between the element and the other element.

In addition, when it is described as being formed or disposed on "above (above)" or "below (below)" of each component, "above (above)" or "below (below)" means that two components are directly connected to each other. It includes not only the case of contact, but also the case where one or more other components are formed or disposed between two components. In addition, when expressed as "upper (upper)" or "lower (lower)", the meaning of not only an upper direction but also a lower direction based on one component may be included.

1 is a block diagram of a door cam according to an embodiment of the present invention.

The door cam 100 according to an embodiment of the present invention includes an imaging unit 110 , a motion detection sensor 120 , a processing unit 130 , a communication unit 140 , and a buffer 150 , and a door open detection sensor 160 , a battery (not shown), a distance detection sensor (not shown), and the like. The battery may supply power required for each configuration of the door cam 100 including the imaging unit 110 . The battery can be detached from the door cam 100 and can be charged through a wired/wireless method, and during normal operation, the door cam 100 can be operated by receiving power only from the battery.

The imaging unit 110 captures an area to be monitored by using the door cam 100 . The imaging unit 110 may include one or more image sensors. A stereo image may be generated using a plurality of image sensors, or images of different angles of view may be simultaneously generated using image sensors having different angles of view. An RGB image or an IR image may be generated by including an RGB image sensor or an IR sensor, and a depth image may be generated through this.

The motion sensor 120 detects a motion in an area to be monitored by using the door cam 100 . The motion detection sensor 120 may include a PIR (Passive InfraRed) sensor, and may include other types of sensors capable of detecting motion. Here, the PIR sensor is a passive infrared sensor, and detects movement by using an infrared change amount according to infrared among radiation emitted from an object. When infrared rays are incident on a pyroelectric element, a temperature rise occurs on the surface of the element, which causes the equilibrium to be broken, and the movement is sensed by using the unbalanced charge as a voltage change. The PIR sensor can be operated for a long time with very low current consumption and can be manufactured in a small size.

The processing unit 130 uses the motion detection information detected by the motion detection sensor 120 to switch the imaging unit 110 to an operation mode. Here, the processing unit 130 may be formed of at least one or more processors. A command or a program may be executed using a command or a program stored in a memory (not shown).

More specifically, the processing unit 130 stores the first image captured by the imaging unit 110 according to the motion detection information in the buffer 150, and when the motion detection information satisfies a predetermined condition, the communication unit ( 140) to the operation mode to transmit the second image captured by the imaging unit 110 to the outside. That is, the motion detection information is used as a wake-up condition of the imaging unit 110 .

In performing monitoring of an area to be monitored using the door cam 100 , the imaging unit 110 captures an image of the corresponding area, and transmits the captured image to the user terminal 200 or the server 300 . send. At this time, when the imaging unit 110 always performs the photographing and transmits the real-time image to the outside, power consumption increases. As a result, the operating time of the door cam 100 operated by the battery is shortened, and the cycle of replacing or charging the battery is shortened, which may cause inconvenience to the user.

In order to reduce power consumption and control efficient operation, the processing unit 130 does not operate the imaging unit 110 or the communication unit 140 in the normal operation mode, but operates it in the operation mode only when necessary. The processing unit 130 may control the imaging unit 110 or the communication unit 140 in a cut-off mode for cutting off power supply, a sleep mode for supplying standby power, or an operation mode for supplying power.

The processing unit 130 may operate the imaging unit 110 and the communication unit 140 in a sleep mode and an operation mode. That is, the operation mode may be switched to the operation mode in a situation in which an operation is required, and may be switched to a sleep mode in which operation is standby in a situation in which an operation is not required to be operated. When the battery power is less than the threshold value, it is possible to prevent power consumption by switching to a cut-off mode for power saving. In addition, it is natural that the cut-off mode, the sleep mode, and the operation mode can be variously switched according to conditions.

When a motion is detected, the processing unit 130 switches the imaging unit 110 to an operation mode to perform photographing, but unnecessary power consumption can be reduced by using the buffer 150 . The processing unit 130 immediately switches the communication unit 140 to the operation mode for the image captured by the image capturing unit 110 after motion detection, and does not transmit the captured image to the outside, but stores the image captured by the image capturing unit in the buffer 150 save to

The buffer 150 stores the image captured by the imaging unit 110 . A buffer is a device that temporarily stores data in order to adjust a time difference or a speed difference of data flow when data is transmitted. It serves to store while The buffer 150 may be implemented as hardware such as a circuit for temporarily storing a signal, or may be implemented as a memory.

The processing unit 130 determines whether the detected motion is a motion for which an image needs to be transmitted to the outside, and only when the detected motion is a motion for which an image needs to be transmitted to the outside, the image of the object is transmitted to the outside. The processing unit 130 transmits the image captured by the imaging unit 110 to the outside by switching the communication unit 140 to the operation mode. The communication unit 140 may transmit an image to the user terminal 200 or the server 300 . Images can be transmitted to the outside through various wired and wireless communications such as Wi-Fi and Bluetooth.

In determining whether the motion detection information sensed by the motion detection sensor 120 satisfies the condition, the processing unit 130 may switch the communication unit 140 from the sleep mode to the operation mode if the motion continues for a predetermined time or longer. have. The processing unit 130 determines whether a condition for transmitting an image to the outside is satisfied according to whether the motion detection information of the motion detection sensor 120 is normally detected or detected as an error. When the door cam 100 has the purpose of determining whether a person is located in the monitoring area, the image is transmitted to the outside even when a motion is detected by an object other than a person or the motion detection sensor malfunctions due to noise or error This is unnecessary power consumption, and in order to prevent this, the processing unit 130 determines whether the motion detection information satisfies a condition.

When the motion detection sensor 120 detects a motion and the corresponding motion continues for more than a preset time, it may be determined that the corresponding motion is normally detected. Alternatively, the motion detection sensor 120 operates at the first sensitivity, but when motion is detected, the sensitivity may be increased to the second sensitivity to more accurately detect the motion. That is, when the motion detected at the first sensitivity is also detected at the second sensitivity, it may be determined that the corresponding motion is normally detected. In addition, it may be determined whether the motion is normally detected using various conditions.

When the motion detection information satisfies the normal condition, the processing unit 130 switches the communication unit 140 to an operation mode in order to transmit the image photographed by the imaging unit 110 to the outside. The image transmitted by the processing unit 130 by switching the communication unit 140 to the operation mode may be an image currently captured by the imaging unit 110 rather than the image stored in the buffer 150 . Here, the image stored in the buffer 150 may be the first image, and the image transmitted by the communication unit 140 into the operation mode may be the second image. That is, the second image may be an image currently captured by the imaging unit 110 .

When transmitting an image to the outside, since it is important to transmit the current image in real time for a monitoring function, the communication unit 140 transmits the second image, which is the current image, when switching to the operation mode. After transmitting the second image, the processing unit 130 may transmit the first image stored in the buffer 150 . As shown in FIG. 2 , the first image photographed when the imaging unit 110 is switched to the operation mode is stored in the buffer 150 , and the second image photographed when the communication unit 140 is switched to the operation mode is stored in the buffer 150 . It is not stored in the communicator 140 and directly transmitted to the outside. The communication unit 140 may transmit the first image after the motion detection is completed and the imaging unit 110 enters the sleep mode again or after the transmission of the second image is completed by a user input or setting.

Whether to transmit the first image may vary depending on whether the motion detection information is based on normal detection or false positive. That is, when the motion detection information is based on a false positive, the first image contains information not necessary for monitoring, and therefore, it is possible to prevent unnecessary switching of the communication unit 140 to the operation mode by not transmitting the information to the outside. The first image may be stored in the memory without being transmitted to the outside. In this case, it may be converted into a compressed file or a still image and stored.

Conversely, when it is determined that the motion detection information is based on normal detection, the communication unit 140 transmits a second image that is a real-time current image. In this case, the second image is transmitted without transmitting the first image together with the second image. Thereafter, the first image stored in the buffer 150 may be transmitted to the outside. The first time, which is an image of a previous time, not real time, may be used as an important image during replay.

Operations of the imaging unit 110 and the communication unit 140 from motion detection may be performed as shown in FIG. 3 . When no motion is detected, the imaging unit 110 and the communication unit 140 operate in a sleep mode for low power consumption. It can also operate in a cut-off mode for lower power. When motion is detected in the sleep mode, the imaging unit 110 switches to the operation mode to capture the first image. At this time, the captured first image is stored in the buffer 150 . When the motion detection satisfies the condition to be transmitted to the outside, the communication unit 140 is switched from the sleep mode to the operation mode, and at this time, the second image captured by the imaging unit 110 is transferred from the communication unit 140, not the buffer 150 . transmitted outside. The second image may be transmitted in real time. When the motion detection is finished, the imaging unit 110 is switched from the operation mode to the sleep mode to end image capturing, and the first image stored in the buffer 150 is transmitted to the outside after the second image. Since a lot of power is consumed when the mode is switched, the first image may be continuously transmitted with the second image while the communication unit 140 maintains the operation mode. Through this, the first image may be transmitted without affecting the transmission of the second image, which is an important image for monitoring.

The first image may be an image or a still image having a first resolution, and the second image may be an image having a second resolution. The first image may be captured by false positives, and thus may be captured as an image having a first resolution or may be captured as a still image such as an image. Since the second image is an image important for monitoring, it may be an image for monitoring having a second resolution. Here, the first resolution may be lower than the second resolution.

The processing unit 130 controls the imaging unit 110 to switch to the first operation mode to capture the first image upon initial motion detection, and sets the imaging unit 110 to the second operation mode when the motion detection information satisfies the condition. It can be controlled to capture the second image by switching to the operation mode. Here, the power supplied to the imaging unit in the first operation mode may be smaller than the power supplied to the imaging unit in the second operation mode. The first image may be a low-quality image having a first resolution, which is a relatively low resolution, and when the first image is photographed, the imaging unit 110 is an image having a first resolution except for functions that consume power, such as autofocus. Alternatively, it may operate in the first operation mode using only the minimum power required to capture a still image. In the case of photographing a still image, photographing may be performed at a preset photographing cycle. In the case of capturing a second image required for real-time transmission, a high-quality image is required, and the image pickup unit 110 may perform capturing using all functions of capturing the second image. By using the operation mode of the imaging unit 110 as the first operation mode and the second operation mode, lower power may be realized.

4 is a block diagram of a door cam 100 according to another embodiment of the present invention.

The door cam 100 according to another embodiment of the present invention includes a first imaging unit 111 , a second imaging unit 112 , a motion detection sensor 120 , a processing unit 130 , and a communication unit 140 , and , a buffer 150 , a door open detection sensor 160 , a battery (not illustrated), a distance detection sensor (not illustrated), and the like.

The first imaging unit 111 captures a first resolution image, and the second imaging unit 112 captures a second resolution image. Here, the first resolution and the second resolution may be different resolutions, and the first resolution may be a relatively lower resolution than the second resolution. For example, the first resolution may be vga or HD level resolution, and the second resolution may be FHD or UHD level resolution. The first imaging unit 111 is an imaging unit that captures a low-resolution low-quality image, and may consume less power than the second imaging unit 112 that captures a high-resolution, high-quality image.

The first imaging unit 111 and the second imaging unit 112 use the door cam 100 to photograph an area to be monitored. The first imaging unit 111 and the second imaging unit 112 may have the same area to be photographed or may partially overlap each other. The first imaging unit 111 and the second imaging unit 112 may include one or more image sensors. A stereo image may be generated using a plurality of image sensors, or images of different angles of view may be simultaneously generated using image sensors having different angles of view. An RGB image or an IR image may be generated by including an RGB image sensor or an IR sensor, and a depth image may be generated through this.

The motion sensor 120 detects a motion in an area to be monitored by using the door cam 100 . The motion detection sensor 120 may include a PIR (Passive InfraRed) sensor, and may include other types of sensors capable of detecting motion. Here, the PIR sensor is a passive infrared sensor, and detects movement by using an infrared change amount according to infrared among radiation emitted from an object. When infrared rays are incident on a pyroelectric element, a temperature rise occurs on the surface of the element, which causes the equilibrium to be broken, and the movement is sensed by using the unbalanced charge as a voltage change. The PIR sensor can be operated for a long time with very low current consumption and can be manufactured in a small size.

The processing unit 130 switches the first imaging unit 111 or the second imaging unit 112 to an operation mode by using the motion detection information detected by the motion detection sensor 120 . Here, the processing unit 130 may be formed of at least one or more processors. A command or a program may be executed using a command or a program stored in a memory (not shown).

More specifically, the processing unit 130 switches the first imaging unit 111 to an operation mode according to the motion detection information, and operates the second imaging unit 112 when the motion detection information satisfies a predetermined condition. mode and transmits the image captured by the second imaging unit to the outside.

In performing monitoring of an area to be monitored using the door cam 100 , the first imaging unit 111 or the second imaging unit 112 captures an image of the corresponding area, and the user It is transmitted to the terminal 200 or the server 300 . At this time, when the first imaging unit 111 or the second imaging unit 112 always performs the photographing and transmits the real-time image to the outside, power consumption increases. In addition, even if an image is captured only when necessary, when the image pickup unit for capturing a high-quality image is not required, power consumption may increase more than necessary. As a result, the operating time of the door cam 100 operated by the battery is shortened, and the cycle of replacing or charging the battery is shortened, which may cause inconvenience to the user.

In order to reduce power consumption and control efficient operation, the processing unit 130 does not operate the first imaging unit 111 , the second imaging unit 112 , or the communication unit 140 in the normal operation mode, and only operates when necessary. operate with The processing unit 130 controls the first imaging unit 111, the second imaging unit 112, or the communication unit 140 in a cut-off mode for cutting off power supply, a sleep mode for supplying standby power, or an operation mode for supplying power. can be controlled

The processing unit 130 may operate the first imaging unit 111 , the second imaging unit 112 , and the communication unit 140 in a sleep mode and an operation mode. That is, the operation mode may be switched to the operation mode in a situation in which an operation is required, and may be switched to a sleep mode in which operation is standby in a situation in which an operation is not required to be operated. When the battery power is less than the threshold value, it is possible to prevent power consumption by switching to a cut-off mode for power saving. In addition, it is natural that the cut-off mode, the sleep mode, and the operation mode can be variously switched according to conditions.

When a motion is detected, the processing unit 130 converts the first imaging unit 111, which consumes less power among the first imaging unit 111 and the second imaging unit 112, to an operation mode, and performs shooting, It is possible to reduce unnecessary power consumption due to performing photographing by using the imaging unit 112 . The processing unit 130 immediately switches the communication unit 140 to the operation mode for the image photographed by the first imaging unit 111 after motion detection, and does not transmit the photographed image to the outside.

In this case, the first image captured by the first imaging unit 111 may be stored in the buffer 150 .

The processing unit 130 determines whether the detected motion is a motion for which an image needs to be transmitted to the outside, and only when the detected motion is a motion for which an image needs to be transmitted to the outside, the high-definition image of the object is transmitted to the outside. The processing unit 130 switches the second imaging unit 112 to the operation mode to photograph an image having a second resolution, and switches the communication unit 140 to the operation mode to obtain the second image captured by the second imaging unit 112 by switching the operation mode. Send the video to the outside. The communication unit 140 may transmit an image to the user terminal 200 or the server 300 . Images can be transmitted to the outside through various wired and wireless communications such as Wi-Fi and Bluetooth.

In determining whether the motion detection information detected by the motion detection sensor 120 satisfies the condition, the processing unit 130 sleeps the second imaging unit 112 and the communication unit 140 when the motion continues for a predetermined time or longer. You can switch from mode to operation mode. The processing unit 130 determines whether a condition for transmitting an image to the outside is satisfied according to whether the motion detection information of the motion detection sensor 120 is normally detected or detected as an error. When the door cam 100 has the purpose of determining whether a person is located in the monitoring area, the image is transmitted to the outside even when a motion is detected by an object other than a person or the motion detection sensor malfunctions due to noise or error This is unnecessary power consumption, and in order to prevent this, the processing unit 130 determines whether the motion detection information satisfies a condition.

When the motion detection sensor 120 detects a motion and the corresponding motion continues for more than a preset time, it may be determined that the corresponding motion is normally detected. Alternatively, the motion detection sensor 120 operates at the first sensitivity, but when motion is detected, the sensitivity may be increased to the second sensitivity to more accurately detect the motion. That is, when the motion detected at the first sensitivity is also detected at the second sensitivity, it may be determined that the corresponding motion is normally detected. In addition, it may be determined whether the motion is normally detected using various conditions.

When the motion detection information satisfies the normal condition, the processing unit 130 switches the second imaging unit 112 to the operation mode, and transmits the second image, which is a high-quality image captured by the second imaging unit 112, to the outside. To do this, the communication unit 140 is switched to the operation mode. The second image transmitted by the processing unit 130 by switching the communication unit 140 into the operation mode may be an image currently captured by the second image capturing unit 112 rather than the first image stored in the buffer 150 . The image stored in the buffer 150 is a first image captured by the first image pickup unit 111 , and the image transmitted by the communication unit 140 switched to the operation mode is a second image captured by the second image capturing unit 112 . It could be a video. That is, the second image may be a high-quality image captured by the imaging unit 110 in real time.

When transmitting an image to the outside, since it is important to transmit the current image in real time for a monitoring function, the communication unit 140 transmits the second image, which is the current image, when switching to the operation mode. After transmitting the second image, the processing unit 130 may transmit the first image stored in the buffer 150 . As shown in FIG. 5 , the first image photographed when the first imaging unit 111 is switched to the operation mode is stored in the buffer 150 , and when the communication unit 140 is switched to the operation mode, the second image is captured by the second imaging unit 112 . The captured second image is not stored in the buffer 150 but is directly transmitted by the communication unit 140 to the outside. The communication unit 140 may transmit the first image after the motion detection is completed and the second image capturing unit 112 enters the sleep mode again, or after the second image transmission is completed by a user input or setting.

Whether to transmit the first image may vary depending on whether the motion detection information is based on normal detection or false positive. That is, when the motion detection information is based on a false positive, the first image contains information not necessary for monitoring, and therefore, it is possible to prevent unnecessary switching of the communication unit 140 to the operation mode by not transmitting the information to the outside. The first image may be stored in the memory without being transmitted to the outside. In this case, it may be converted into a compressed file or a still image and stored.

Conversely, when it is determined that the motion detection information is based on normal detection, the communication unit 140 transmits a second image that is a real-time current image. In this case, the second image is transmitted without transmitting the first image together with the second image. Thereafter, the first image stored in the buffer 150 may be transmitted to the outside. The first time, which is an image of a previous time, not real time, may be used as an important image during replay.

Operations of the imaging unit 110 and the communication unit 140 from motion detection may be performed as shown in FIG. 6 . When no motion is detected, the first imaging unit 111 , the second imaging unit 112 , and the communication unit 140 operate in a sleep mode for low power consumption. It can also operate in a cut-off mode for low power. When motion is detected in the sleep mode, the first imaging unit 111 switches to the operation mode to capture the first image. At this time, the captured first image is stored in the buffer 150 . When the motion detection satisfies the condition to be transmitted to the outside, the second imaging unit 112 is switched from the sleep mode to the operation mode to take a second image, and the communication unit 140 is switched from the sleep mode to the operation mode. When the second imaging unit 112 is switched to the operation mode, the first imaging unit 111 may be switched from the operation mode to the sleep mode. The second image captured by the second imaging unit 112 is transmitted from the communication unit 140 rather than the buffer 150 to the outside. The second image may be transmitted in real time. When the motion detection is finished, the second imaging unit 112 is switched from the operation mode to the sleep mode to end image capturing, and the first image stored in the buffer 150 is transmitted to the outside after the second image. Since a lot of power is consumed when the mode is switched, the first image may be continuously transmitted with the second image while the communication unit 140 maintains the operation mode. Through this, the first image may be transmitted without affecting the transmission of the second image, which is an important image for monitoring.

The first image may be an image or a still image having a first resolution, and the second image may be an image having a second resolution. The first image may be captured by false positives, and thus may be captured as an image having a first resolution or may be captured as a still image such as an image. Since the second image is an image important for monitoring, it may be an image for monitoring having a second resolution. Here, the first resolution may be lower than the second resolution.

The processing unit 130 controls the first image capturing unit 111 to be switched to an operation mode to capture the first image upon initial motion detection, and operates the second image capturing unit 112 when the motion sensing information satisfies the condition. It switches to the second operation mode and controls to capture the second image. Low power may be realized by using two imaging units, the first imaging unit 111 and the second imaging unit 112 .

7 is a block diagram of a door cam 100 according to another embodiment of the present invention.

The door cam 100 according to another embodiment of the present invention includes an imaging unit 110 , a door open detection sensor 160 , a motion detection sensor 120 , a processing unit 130 , and a communication unit 140 , and a buffer 150 , a battery (not shown), a distance detection sensor (not shown), and the like.

The imaging unit 110 captures an area to be monitored by using the door cam 100 . The imaging unit 110 may include one or more image sensors. A stereo image may be generated using a plurality of image sensors, or images of different angles of view may be simultaneously generated using image sensors having different angles of view. An RGB image or an IR image may be generated by including an RGB image sensor or an IR sensor, and a depth image may be generated through this.

The motion sensor 120 detects a motion in an area to be monitored by using the door cam 100 . The motion detection sensor 120 may include a PIR (Passive InfraRed) sensor, and may include other types of sensors capable of detecting motion. Here, the PIR sensor is a passive infrared sensor, and detects movement by using an infrared change amount according to infrared among radiation emitted from an object. When infrared rays are incident on a pyroelectric element, a temperature rise occurs on the surface of the element, which causes the equilibrium to be broken, and the movement is sensed by using the unbalanced charge as a voltage change. The PIR sensor can be operated for a long time with very low current consumption and can be manufactured in a small size.

The door open detection sensor 160 detects that the door is opened and closed. The opening of the door can be detected by detecting the position of the door or by detecting a signal change between two devices formed on the door side and the wall side. The door open detection sensor 160 may include various sensors capable of detecting door opening, such as a gyro sensor and a hall sensor.

The processing unit 130 switches the imaging unit 110 to the operation mode by using the motion detection information detected by the motion detection sensor 120 or the door open detection information detected by the door open detection sensor 160 . Here, the processing unit 130 may be formed of at least one or more processors. A command or a program may be executed using a command or a program stored in a memory (not shown).

More specifically, the processing unit 130 switches the imaging unit 110 to the operation mode when the door open is detected, and switches the communication unit 140 to the operation mode when motion is detected while the imaging unit 110 is in the operation mode. Thus, the image captured by the imaging unit 110 is transmitted to the outside.

In performing monitoring of an area to be monitored using the door cam 100 , the imaging unit 110 captures an image of the corresponding area, and transmits the captured image to the user terminal 200 or the server 300 . send. At this time, when the imaging unit 110 always performs the photographing and transmits the real-time image to the outside, power consumption increases. As a result, the operating time of the door cam 100 operated by the battery is shortened, and the cycle of replacing or charging the battery is shortened, which may cause inconvenience to the user.

In order to reduce power consumption and control efficient operation, the processing unit 130 does not operate the imaging unit 110 or the communication unit 140 in the normal operation mode, but operates it in the operation mode only when necessary. The processing unit 130 may control the imaging unit 110 or the communication unit 140 in a cut-off mode for cutting off power supply, a sleep mode for supplying standby power, or an operation mode for supplying power.

The processing unit 130 may operate the imaging unit 110 and the communication unit 140 in a sleep mode and an operation mode. That is, the operation mode may be switched to the operation mode in a situation in which an operation is required, and may be switched to a sleep mode in which operation is standby in a situation in which an operation is not required to be operated. When the battery power is less than the threshold value, it is possible to prevent power consumption by switching to a cut-off mode for power saving. In addition, it is natural that the cut-off mode, the sleep mode, and the operation mode can be variously switched according to conditions.

When the opening of the door is detected, the processing unit 130 switches the imaging unit 110 to an operation mode to perform photographing. When the door open is detected, the state in which a person can enter and exit the house or from outside the house, the imaging unit 110 is switched to the operation mode in order to take a picture. However, since the door is opened and closed and no person enters the bar, the image photographed by the imaging unit 110 is immediately switched to the communication unit 140 to the operation mode, and the photographed image is not transmitted to the outside. When detected, the communication unit 140 is switched to the operation mode and the captured image is transmitted to the outside. That is, door open detection is used as a wake-up condition of the imaging unit 110 , and motion detection is used as a wake-up condition of the communication unit 140 .

In this case, the processing unit 130 may store the image taken in the buffer 150 after detecting the motion, before the motion is detected and the communication unit 140 is switched to the operation mode, without being transmitted to the outside. The buffer 150 stores the image captured by the imaging unit 110 . A buffer is a device that temporarily stores data in order to adjust a time difference or a speed difference of data flow when data is transmitted. It serves to store while The buffer 150 may be implemented as hardware such as a circuit for temporarily storing a signal, or may be implemented as a memory.

The processing unit 130 determines whether the detected motion is a motion for which an image needs to be transmitted to the outside even if a motion is detected after the door opening is detected, and only when the detected motion is a motion for which an image needs to be transmitted to the outside, the target is selected It is also possible to transmit the captured image to the outside. The processing unit 130 transmits the image captured by the imaging unit 110 to the outside by switching the communication unit 140 to the operation mode. The communication unit 140 may transmit an image to the user terminal 200 or the server 300 . Images can be transmitted to the outside through various wired and wireless communications such as Wi-Fi and Bluetooth.

In determining whether the motion detection information sensed by the motion detection sensor 120 satisfies the condition, the processing unit 130 may switch the communication unit 140 from the sleep mode to the operation mode if the motion continues for a predetermined time or longer. have. The processing unit 130 determines whether a condition for transmitting an image to the outside is satisfied according to whether the motion detection information of the motion detection sensor 120 is normally detected or detected as an error. When the door cam 100 has the purpose of determining whether a person is located in the monitoring area, the image is transmitted to the outside even when a motion is detected by an object other than a person or the motion detection sensor malfunctions due to noise or error This is unnecessary power consumption, and in order to prevent this, the processing unit 130 determines whether the motion detection information satisfies a condition.

When the motion detection sensor 120 detects a motion and the corresponding motion continues for more than a preset time, it may be determined that the corresponding motion is normally detected. Alternatively, the motion detection sensor 120 operates at the first sensitivity, but when motion is detected, the sensitivity may be increased to the second sensitivity to more accurately detect the motion. That is, when the motion detected at the first sensitivity is also detected at the second sensitivity, it may be determined that the corresponding motion is normally detected. In addition, it may be determined whether the motion is normally detected using various conditions.

When the motion detection information satisfies the normal condition, the processing unit 130 switches the communication unit 140 to an operation mode in order to transmit the image photographed by the imaging unit 110 to the outside. The image transmitted by the processing unit 130 by switching the communication unit 140 to the operation mode may be an image currently captured by the imaging unit 110 rather than the image stored in the buffer 150 . Here, the image stored in the buffer 150 may be the first image, and the image transmitted by the communication unit 140 into the operation mode may be the second image. That is, the second image may be an image currently captured by the imaging unit 110 .

When transmitting an image to the outside, since it is important to transmit the current image in real time for a monitoring function, the communication unit 140 transmits the second image, which is the current image, when switching to the operation mode. After transmitting the second image, the processing unit 130 may transmit the first image stored in the buffer 150 . As shown in FIG. 8 , the first image photographed when the imaging unit 110 is switched to the operation mode is stored in the buffer 150 , and the second image photographed when the communication unit 140 is switched to the operation mode is stored in the buffer 150 . It is not stored in the communicator 140 and directly transmitted to the outside. The communication unit 140 may transmit the first image after the motion detection is completed and the imaging unit 110 enters the sleep mode again or after the transmission of the second image is completed by a user input or setting.

Whether to transmit the first image may vary depending on whether a motion is detected after the door opening is detected or whether the motion detection information is based on a normal detection or a false positive. If no motion is detected after the door is opened, or when the motion detection information is based on a false positive, the first image contains information not required for monitoring. conversion can be prevented. The first image may be stored in the memory without being transmitted to the outside. In this case, it may be converted into a compressed file or a still image and stored.

Conversely, when motion is detected after door open detection or when it is determined that the motion detection information is based on normal detection, the communication unit 140 transmits a second image that is a real-time current image, in which case the first image is separated from the second image. Instead of transmitting together, the first image stored in the buffer 150 may be transmitted to the outside after the second image is transmitted. The first time, which is an image of a previous time, not real time, may be used as an important image during replay.

Operations of the imaging unit 110 and the communication unit 140 from motion detection may be performed as shown in FIG. 9 . When the door opening or movement is not detected, the imaging unit 110 and the communication unit 140 operate in a sleep mode for low power consumption. It can also operate in a cut-off mode for lower power. When the door open is detected in the sleep mode, the imaging unit 110 switches to the operation mode to capture the first image. In this case, the captured first image may be stored in the buffer 150 . When a motion is detected after the door opening is detected, the communication unit 140 is switched from the sleep mode to the operation mode. is sent The second image may be transmitted in real time. When the motion detection is finished, the imaging unit 110 is switched from the operation mode to the sleep mode to end image capturing, and the first image stored in the buffer 150 is transmitted to the outside after the second image. Since a lot of power is consumed when the mode is switched, the first image may be continuously transmitted with the second image while the communication unit 140 maintains the operation mode. Through this, the first image may be transmitted without affecting the transmission of the second image, which is an important image for monitoring.

The first image may be an image or a still image having a first resolution, and the second image may be an image having a second resolution. The first image may be photographed only by door opening detection without motion detection, may be photographed as an image having a first resolution, or may be photographed as a still image such as an image. Since the motion-detected second image is an image important for monitoring, it may be an image for monitoring having a second resolution. Here, the first resolution may be lower than the second resolution.

The processing unit 130 controls the imaging unit 110 to switch to the first operation mode to capture the first image upon initial motion detection, and sets the imaging unit 110 to the second operation mode when the motion detection information satisfies the condition. It can be controlled to take the second image by switching to the operation mode. Here, the power supplied to the imaging unit in the first operation mode may be smaller than the power supplied to the imaging unit in the second operation mode. The first image may be a low-quality image having a first resolution, which is a relatively low resolution, and when the first image is photographed, the imaging unit 110 is an image having a first resolution except for functions that consume power, such as autofocus. Alternatively, it may operate in the first operation mode using only the minimum power required to capture a still image. In the case of photographing a still image, photographing may be performed at a preset photographing cycle. In the case of capturing a second image required for real-time transmission, a high-quality image is required, and the image pickup unit 110 may perform capturing using all functions of capturing the second image. By using the operation mode of the imaging unit 110 as the first operation mode and the second operation mode, lower power may be realized.

The door cam 100 may use the second motion detection information detected by the second motion detection sensor 170 or the doorbell motion information detected by the doorbell 180 . As shown in FIG. 10 , the communication unit 140 receives the second motion detection information from the second motion detection sensor 170 that detects a motion in an area where at least a portion of the motion detection sensor 120 does not overlap, and the processing unit ( When the second motion detection information or the door open detection information is input, 130 may switch the motion detection sensor 120 to an operation mode.

The second motion sensor 170 may be a sensor that detects an area farther from the door than the motion sensor 120 . The second motion detection sensor 170 is an external sensor of the door cam 100 , and may not affect the power consumption of the door cam 100 by operating with separate power instead of the power of the door cam 100 . Alternatively, the door cam 100 may be formed together with the motion sensor 120 . Based on the motion sensor 120 , the movement from the inside of the door to the outside can be detected first using the door open sensor 160 , and the motion in the area further from the door is detected by the second motion sensor 170 . can be detected first. That is, since the door open detection sensor 160 or the second motion detection sensor 170 can detect a motion before the motion detection sensor 120 , the door open detection information or the second motion detection sensor 160 . 2 By using the second motion detection information of the motion detection sensor 170 as a wake-up condition of the motion detection sensor 120, a lower power consumption may be realized.

When the second motion detection information is input, the processing unit 130 may change the sensitivity of the motion detection sensor from the first sensitivity to the second sensitivity. The motion detection sensor 120 maintains an operation mode, but when the second motion detection information is input, the sensitivity of the motion detection sensor may be changed from the first sensitivity to the second sensitivity. Here, the power supplied from the battery at the first sensitivity may be smaller than the power supplied from the battery at the second sensitivity. That is, it is possible to implement low power by using two levels of sensitivity. It goes without saying that the sensitivity can be varied in three or more steps. The first sensitivity is a sensitivity capable of performing coarse detection of a motion, and may be a preset sensitivity. The second sensitivity is a sensitivity capable of performing fine detection, and may also be a preset sensitivity. In the sleep mode in which no motion is detected, the operation is performed at the first sensitivity. When the motion detection sensor detects a motion, the sensitivity of the other motion detection sensor may be changed from the first sensitivity to the second sensitivity.

The processing unit 130 may detect the directionality of the object according to the motion detection information of the motion detection sensor 120 and the second motion detection sensor 170 . After the motion detection sensor 120 detects the motion, when the second motion detection sensor 170 detects the motion, the processing unit 130 determines that the object enters the door, and the second motion detection sensor 170 ) after detecting the motion, when the motion detection sensor 120 detects the motion, it may be determined that the object moves out of the door. After detecting the motion in the area far from the entrance, when the motion is detected in the area close to the entrance, it may be determined that the object in which the motion is sensed approaches the entrance. Thereafter, when the motion detection is stopped after the entrance is opened and closed, it can be determined that the corresponding object has entered the entrance.

Conversely, when motion is sensed in a region far from the entrance hall after motion is detected in a region close to the entrance hall, it may be determined that the object in which the motion is sensed moves away from the entrance hall. If it is detected that the entrance is opened and closed before the movement is detected in the area, it may be determined that the corresponding object has moved out of the entrance. Thereafter, when the motion detection is stopped, it may be determined that the object has moved out of the entrance hall.

It may further include a distance sensor for detecting the distance of the target object, in this case, the processing unit 130, when the motion sensor detects a motion, converts the distance sensor to the operation mode, the direction or movement of the object can detect whether The motion sensor 120 is a sensor for detecting motion, and it is difficult to accurately detect a distance to an object. Accordingly, when the motion sensor 120 detects a motion, the distance to the object may be measured using the distance sensor, and the direction or movement of the object may be detected through a change in distance or change in angle. The distance sensor may be an infrared sensor.

Low power may be implemented using doorbell operation information of the doorbell 180 instead of the second motion detection sensor 170 . 10 , when the communication unit 140 receives the doorbell operation information from the doorbell 180 and the processing unit 130 receives the doorbell operation information, the imaging unit 110 can be switched to the operation mode. have. The doorbell 180 operates only when a button is pressed by a person or a touch panel is input, and the doorbell operation information is accurate information on the position of a person in front of the door. Upon reception, the imaging unit 110 may be switched to an operation mode to take a picture. At this time, the communication unit 140 performing the transmission may also switch to the operation mode and transmit the photographed image to the outside. By using the doorbell operation information as a wake-up examination of the imaging unit 110, low power can be implemented.

The processing unit 130 may operate in four control modes.

The processing unit 130 generates an image of a first control mode for starting an operation mode when the motion is detected, a second control mode for recognizing an object, a third control mode for setting an area of the object, and an image for the set area of the object. The imaging unit may be controlled in the fourth control mode for external transmission. In this case, the amount of power supplied from the battery to the imaging unit 110 may be different according to each control mode. The processing unit 130 may minimize power consumption by varying the use of battery power in stages at each stage.

The processing unit 130 may control the shooting speed of the imaging unit 110 for each control mode.

In the first control mode in which an operation mode is started when motion is sensed, the photographing speed of the imaging unit may be controlled to a slow first speed. Since object recognition is sufficient as a still image rather than a moving image, power may be supplied to the imaging unit 110 to photograph only one or more still images.

Thereafter, in the second control mode for recognizing an object, since the photographing of the imaging unit 110 is unnecessary, the supply of power to the imaging unit 110 may be stopped. Power may be supplied in the sleep mode so that the imaging unit 110 may operate immediately without shutting off the power completely. In the second control mode, when recognizing an object, recognition may be performed only on an object located in the second area close to the entrance. Through this, it is possible to protect the privacy of objects other than the monitoring target.

The second control mode for recognizing an object is an image analysis mode for analyzing the image captured by the imaging unit 110, an artificial intelligence mode for recognizing the object through an algorithm using machine learning, and a motion detection mode for detecting the motion of the object , and at least one mode among distance measurement modes for measuring the distance of the object by using a distance measurement sensor.

The processing unit 130 may recognize the object by analyzing the image captured by the imaging unit 110 . Alternatively, an object may be recognized using artificial intelligence. In using artificial intelligence, an algorithm using machine learning may be used. It is also possible to recognize an object in an image using artificial intelligence and determine whether the object is a person. For example, after detecting a movement, a person can be recognized by artificial intelligence, a person area can be checked, and the corresponding video can be streamed. Alternatively, the object may be recognized by detecting the motion using a motion sensor that detects the motion of the object and analyzing the motion. In analyzing the motion, if the motion is a motion of a person, the object may be recognized as a person. Alternatively, the distance of the object may be measured using the distance sensor 150 .

For accurate and secure monitoring of the monitoring area, other information may be used together with the motion detection of the motion sensor 120 . For example, with motion detection of a motion sensor, image analysis may be performed, or artificial intelligence may be used, or motion detection may be performed with image analysis or artificial intelligence, and a distance measurement sensor and artificial intelligence may be used together. It can be used together with temperature compensation or illuminance sensor.

Thereafter, even in the third control mode for setting the area of the object, since the imaging unit 110 is unnecessary, the power supply to the imaging unit 110 may be cut off. The region of the object may be set through a region of interest (ROI) setting method. Masking can be set in areas other than the set object area. As described above, masking may be used to solve the problem of photographing the front house. You can protect privacy by setting masking in areas other than the object to be monitored.

Thereafter, in the fourth control mode in which the image of the set object area is transmitted to the outside, since the imaging unit 110 must continuously photograph the set object area, power may be continuously supplied to the imaging unit 110 . The image captured by the imaging unit 110 may be transmitted to the outside through wired/wireless communication. When it is desired to check the corresponding image from the outside in real time, the processing unit 130 may stream the image of the set object area to an external image reproducing device.

Since the operation of the imaging unit 110 or the image to be generated varies according to each control mode, power supply to the imaging unit 110 may be controlled according to each control mode.

Modifications according to an embodiment of the present invention include a door cam according to an embodiment of the present invention described with reference to FIGS. 1 to 3 , a door cam according to another embodiment of the present invention described with reference to FIGS. 4 to 6 , and some components of a door cam according to another embodiment of the present invention described with reference to FIGS. 7 to 10 . That is, the modified example is a door cam according to an embodiment of the present invention described with reference to FIGS. 1 to 3 , a door cam according to another embodiment of the present invention described with reference to FIGS. 4 to 6 , and FIGS. 7 to FIG. Some components may be omitted from one embodiment of the door cam according to another embodiment of the present invention described with reference to 10, and some components of the corresponding other embodiments may be included.

For example, a modified example according to an embodiment of the present invention includes an imaging unit 110 comprising a first imaging unit 111 and a second imaging unit 112 , a motion detection sensor 120 , a processing unit 130 , The communication unit 140 , the buffer 150 , the door open detection sensor 160 , the second motion detection sensor 170 , the doorbell 180 , the distance detection sensor, and the like may be configured.

11 is a block diagram of a monitoring system according to an embodiment of the present invention. The monitoring system according to an embodiment of the present invention includes a door cam 100 , a user terminal 200 , and a server 300 . Here, the detailed description of the door cam 100 corresponds to the detailed description of the door cam of FIGS. 1 to 10 . The user terminal 200 receives the image from the door cam 100 , displays it on the display, and provides it to the user. Here, the user terminal may be a portable terminal or a PC terminal. The server 300 is a server that receives an image from the door cam 100 and performs monitoring, and may be a CCTV system server. Monitoring can be performed through video analysis, etc.

12 to 14 are a door cam control method according to an embodiment of the present invention. The detailed description of the door cam control method according to FIG. 12 corresponds to the detailed description of the door cam according to the embodiment of the present invention in FIGS. 1 to 3 , and the detailed description of the door cam control method according to FIG. 13 is It corresponds to the detailed description of the door cam according to the embodiment of the present invention in Figs. 4 to 6, and the detailed description of the door cam control method according to Fig. 14 is in the embodiment of the present invention in Figs. Corresponding to the detailed description of the door cam, the overlapping description below will be omitted.

In the door cam control method according to an embodiment of the present invention, as shown in FIG. 12 , the motion sensor detects a motion in step S11, and when the motion is detected, the image pickup unit is switched to the operation mode in step S12, and in step S13 The first image captured by the imaging unit is stored in a buffer. In step S14, it is determined whether the motion detection information for detecting the motion satisfies a predetermined condition, and if the motion detection information satisfies the condition, the communication unit is switched to the operation mode in step S15, and the communication unit is the communication unit in step S16. The second image captured by the imaging unit is transmitted to the outside. The method may further include transmitting the first image stored in the buffer after transmitting the second image. The imaging unit switches to a first operation mode when initial motion is detected to photograph the first image, and when the motion detection information satisfies the condition, switches to a second operation mode to photograph the second image, and In the operation mode, the power supplied to the imaging unit is less than the power supplied to the imaging unit in the second operation mode, the first image is an image or a still image having a first resolution, and the second image is a second image. It may be an image having a resolution.

In the door cam control method according to another embodiment of the present invention, as shown in FIG. 13 , the motion detection sensor detects a motion in step S21, and when the motion is detected, the first imaging unit is switched to the operation mode in step S22, S23 In the step, the first image captured by the first imaging unit is stored in a buffer. In step S24, it is determined whether the motion detection information for detecting the motion satisfies a predetermined condition, and if the motion detection information satisfies the condition, the second imaging unit and the communication unit are switched to the operation mode in step S25, and step S26 in the communication unit transmits the second image captured by the second imaging unit to the outside. The method may further include transmitting the first image stored in the buffer after transmitting the second image. The first imaging unit captures a first resolution image, the second imaging unit captures a second resolution image, the first resolution is lower than the second resolution, and the power supplied to the first imaging unit is applied to the second It may be less than the power supplied to the imaging unit.

In the door cam control method according to another embodiment of the present invention, as shown in FIG. 14, the door open sensor detects the door open in step S31, and when the door open is detected, the imaging unit switches to the operation mode in step S32, The motion sensor detects a motion in step S33, and when the motion is detected, the communication unit switches to an operation mode in step S34, and the communication unit transmits the image captured by the imaging unit to the outside in step S35. If second motion detection information is received from a second motion detection sensor that detects a motion in an area where at least a portion of the motion detection sensor does not overlap, switching the motion detection sensor to an operation mode and the doorbell from the doorbell The method may further include switching the imaging unit to an operation mode when operation information is received. The imaging unit is switched to a first operation mode when the door open is detected to take a first image, and when the movement is detected, is switched to a second operation mode to take a second image, and the communication unit, in the operation mode After transmitting the second image, the first image is transmitted, and the power supplied to the imaging unit in the first operation mode is smaller than the power supplied to the imaging unit in the second operation mode, and the first image is transmitted. The image may be an image or a still image having a first resolution, and the second image may be an image having a second resolution.

Meanwhile, the above-described method can be written as a program that can be executed on a computer, and can be implemented in a general-purpose digital computer that operates the program using a computer-readable recording medium. In addition, the structure of the data used in the above-described method may be recorded in a computer-readable recording medium through various means. The computer-readable recording medium includes a storage medium such as a magnetic storage medium (eg, ROM, RAM, USB, floppy disk, hard disk, etc.) and an optically readable medium (eg, CD-ROM, DVD, etc.). do.

A person of ordinary skill in the art related to this embodiment will understand that it can be implemented in a modified form within a range that does not deviate from the essential characteristics of the above description. Therefore, the disclosed methods are to be considered in an illustrative rather than a restrictive sense. The scope of the present invention is indicated in the claims rather than the foregoing description, and all differences within the scope equivalent thereto should be construed as being included in the present invention.

100: door cam 110: imaging unit
111: first imaging unit 112: second imaging unit
120: motion detection sensor 130: processing unit
140: communication unit 150: buffer
160: door open detection sensor 170: second motion detection sensor
180: doorbell

Claims (11)

imaging unit;
a motion sensor for detecting motion;
a processing unit for switching the imaging unit to an operation mode by using the motion detection information detected by the motion detection sensor;
a communication unit for transmitting the image captured by the imaging unit to the outside; and
and a buffer for storing the image captured by the imaging unit,
The processing unit,
The first image captured by the imaging unit according to the motion detection information is stored in the buffer, and when the motion detection information satisfies a predetermined condition, the communication unit switches to an operation mode and the second image captured by the imaging unit send to the outside,
The processing unit,
A first control mode for starting an operation mode upon initial motion detection, a second control mode for recognizing an object, a third control mode for setting the area of the object, and a fourth control for transmitting an image of the set area of the object to the outside Control the imaging unit in a control mode,
In the first control mode, power is supplied to the imaging unit according to the cycle to capture the first image, which is a still image, at a preset shooting cycle, and in the second control mode and the third control mode, power is supplied to the imaging unit The door cam, characterized in that the supply is cut off, and power is continuously supplied to the imaging unit to capture the second image, which is a moving image, in the fourth control mode. According to claim 1,
The second image is an image currently captured by the imaging unit,
The processing unit,
After transmitting the second image, the door cam characterized in that it transmits the first image stored in the buffer. According to claim 1,
The processing unit,
A door cam that switches the communication unit from a sleep mode to an operation mode when the motion detected by the motion sensor continues for a predetermined time or longer. According to claim 1,
The processing unit,
A door cam, characterized in that it controls the imaging unit or the communication unit in a cut-off mode for cutting off power supply, a sleep mode for supplying standby power, or an operation mode for supplying power. According to claim 1,
The first image is an image having a first resolution,
The second image is an image having a second resolution. delete delete The door cam of any one of claims 1 to 5;
a user terminal for receiving an image from the door cam; and
and a server receiving an image from the door cam and monitoring the corresponding area. detecting a motion by a motion sensor;
switching the imaging unit to an operation mode when the motion is detected;
storing the first image captured by the imaging unit in a buffer;
determining whether the motion detection information for detecting the motion satisfies a predetermined condition;
switching the communication unit to an operation mode when the motion detection information satisfies the condition; and
and transmitting, by the communication unit, the second image captured by the imaging unit to the outside;
The imaging unit,
A first control mode for starting an operation mode upon initial motion detection, a second control mode for recognizing an object, a third control mode for setting the area of the object, and a fourth control for transmitting an image of the set area of the object to the outside Controlled in control mode,
In the first control mode, power is supplied to the imaging unit according to the cycle to capture the first image, which is a still image, at a preset shooting cycle, and in the second control mode and the third control mode, power is supplied to the imaging unit A door cam control method in which the supply is cut off, and power is continuously supplied to the imaging unit to capture the second image, which is a moving image, in the fourth control mode. 10. The method of claim 9,
After transmitting the second image, the method further comprising the step of transmitting the first image stored in the buffer. 10. The method of claim 9,
The first image is an image having a first resolution,
The second image is an image having a second resolution.

Images