KR20230097966A - Video recording apparatus, and controlling method thereof - Google Patents

Abstract

The present invention relates to a video recording device and a control method thereof. An image recording apparatus according to an embodiment of the present invention may include a motion detection sensor, a controller, and an application processor. The motion detection sensor may detect movement of an object outside the vehicle. The controller is activated based on the motion detection sensor detecting an object, and can monitor the object through the motion detection sensor for a unit period. The image processor may be activated based on the monitoring result of the object and perform an image recording function.

Description

Video recording device and its control method {VIDEO RECORDING APPARATUS, AND CONTROLLING METHOD THEREOF}

The present invention relates to a video recording device and a control method thereof, and in particular, to provide a video recording device for a vehicle capable of reducing power consumption.

A black box for recording a collision with an external object while a vehicle is stopped or operated is widely used. A general black box continuously acquires external images through a continuous recording function. When the continuous recording function is used, the recording time is limited due to memory capacity, and in particular, when the engine is turned off, a problem of causing discharge of the battery that supplies power to the black box may occur.

In order to improve these disadvantages, an image is recorded only when there is a certain shock through the shock detection recording function. However, even when the shock detection recording function is used, the problem of excessive current consumption still exists because continuous image recording is basically performed to record an image immediately before the shock.

An embodiment of the present invention is to provide an image recording device capable of reducing power consumption and a control method thereof.

In addition, an embodiment of the present invention is to provide a video recording apparatus and a control method capable of preventing unnecessary video from being recorded by an object that does not pose a threat to a vehicle.

The technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description below.

An image recording apparatus according to an embodiment of the present invention may include a motion detection sensor, a controller, and an application processor. The motion detection sensor may detect movement of an object outside the vehicle. The controller is activated based on the motion detection sensor detecting an object, and may monitor the motion of the object during a unit period through the motion detection sensor. The image processor may be activated based on the monitoring result of the object and perform an image recording function.

The controller and the image processor according to an embodiment of the present invention may enter an inactive state based on that the engine of the vehicle is turned off.

The motion detection sensor according to an embodiment of the present invention obtains sensing data in digital form at regular intervals based on a received signal from a radar, and calculates the signal strength of the received signal or the sensing distance of the object based on the sensing data. can judge

The motion detection sensor according to an embodiment of the present invention generates an activation signal for the motion detection sensor to activate the controller based on whether the signal strength is greater than or equal to a threshold value or the detection distance is less than the threshold distance, and the LVDS Based on this, the activation signal may be transmitted to the controller.

The controller according to an embodiment of the present invention receives the sensing data from the motion detection sensor during a unit period, and among the sensing data, the signal strength has a magnitude greater than or equal to the threshold or the detection distance is less than the threshold distance. , and activates the image processor or maintains an inactive state of the image processor based on the fact that the number of target data is less than a first threshold.

The controller according to an embodiment of the present invention is configured to set the number of target data whose signal strength is equal to or greater than the threshold value to a first threshold value or the number of target data whose detection distance is less than a second threshold value. If less than the value, the inactive state of the image processor may be maintained.

The controller according to an embodiment of the present invention calculates a signal strength deviation between an n+1 (n is a natural number) th target data and an n th target data among the target data during the unit period, and calculates a positive amount among the signal strength deviations. The image processor may be activated based on that the number of values of is greater than or equal to the third threshold.

The controller according to an embodiment of the present invention calculates the sensing distance deviation between the n+1 (n is a natural number) th target data and the n th target data among the target data during the unit period, and among the sensing distance deviations Activation of the image processor may be determined based on the fact that the number of 0 (zero) or negative values is greater than or equal to the fourth threshold.

The controller according to an embodiment of the present invention may enter a deactivated state based on determining to maintain the deactivated state of the image processor.

An image recording device according to an embodiment of the present invention may further include an image sensor that is activated under the control of the image processor to obtain an image and a memory device for storing the image acquired by the image sensor.

A method for controlling a video recording device according to an embodiment of the present invention includes the steps of detecting the movement of an external object by a motion sensor of a camera module, activating a controller of a cam control module based on the detected object, and A step of selectively activating an image processor for image recording based on monitoring of the object during the unit period may be included.

The step of detecting the motion of the external object according to an embodiment of the present invention may further include inactivating the controller and the image processor based on that the engine of the vehicle is turned off.

The step of detecting the movement of the object according to an embodiment of the present invention includes acquiring digital sensing data at regular intervals based on a received signal from a radar, and measuring the signal strength of the received signal based on the sensing data. Alternatively, it may include determining a sensing distance of the object.

In the step of activating the controller according to an embodiment of the present invention, the motion detection sensor generates an activation signal for activating the controller based on whether the signal strength is greater than or equal to a threshold value or the detection distance is less than a threshold distance. and transmitting the activation signal to the controller based on LVDS.

Selectively activating the image processor according to an embodiment of the present invention includes receiving the sensing data from the motion detection sensor for a unit period based on the activation of the controller, among the sensing data during the unit period. detecting target data for which the signal strength is greater than or equal to the threshold or the detection distance is less than the threshold, and activating the image processor or maintaining an inactive state of the image processor based on the target data can include

In the step of maintaining the inactive state of the image processor according to an embodiment of the present invention, the number of target data whose signal strength is greater than or equal to the threshold strength is less than a first threshold value, or the detection distance is less than the threshold distance. It may proceed when the number of target data is less than the second threshold.

The step of activating the image processor according to an embodiment of the present invention includes calculating a signal strength deviation between n+1 (n is a natural number) th target data and n th target data among the target data during the unit period; The method may further include activating the image processor based on the number of positive values among the signal strength deviations being greater than or equal to a third threshold.

The step of activating the image processor according to an embodiment of the present invention includes calculating the detection distance deviation between n+1 (n is a natural number) th target data and n th target data among the target data during the unit period; and The method may further include activating the image processor based on the fact that the number of zero or negative values among the sensing distance deviations is greater than or equal to a fourth threshold.

Selectively activating the image processor according to an embodiment of the present invention further includes maintaining an inactive state of the image processor based on sensing of the motion detection sensor, and the activated controller causes the image processor to When the inactive state is maintained, the method may further include inactivating the controller.

The control method of the video recording device according to an embodiment of the present invention may further include storing an image signal obtained by an image sensor of the camera module in a memory device based on activation of the image processor.

According to the control method of the video recording apparatus according to the embodiment of the present invention, since the controller is activated based on motion detection, unnecessary power consumption for the operation of the controller can be reduced while the engine of the vehicle is turned off.

In addition, according to the control method of the video recording apparatus according to the embodiment of the present invention, since the video processor is activated according to the type and motion of the object identified based on the monitoring result of the object, unnecessary time is spent on recording an image. Power consumption can be improved.

also. According to the method for controlling a video recording apparatus according to an embodiment of the present invention, video recording is not performed for an object that is not threatening to a vehicle based on monitoring of the object, so unnecessary video can be prevented from being recorded.

In addition to this, various effects identified directly or indirectly through this document may be provided.

1 is a block diagram showing the configuration of a video recording apparatus according to an embodiment of the present invention.
2 is a diagram showing the structure of a camera module.
3 is a diagram showing the configuration of a video recording apparatus according to another embodiment of the present invention.
4 is a diagram illustrating a video recording apparatus according to another embodiment.
5 is a flowchart illustrating a method of controlling a video recording apparatus according to an embodiment of the present invention.
6 is a flowchart illustrating a control method of a video recording apparatus according to another embodiment of the present invention.
7 to 10 are diagrams illustrating procedures for activating elements of the video recording apparatus.
11 to 13 are diagrams for explaining an embodiment of determining whether to activate an AP according to signal strength of sensing data, respectively.
14 to 16 are diagrams for explaining an embodiment of determining whether to activate an AP according to signal strength of sensing data, respectively.
17 is a flowchart illustrating a control method of a video recording apparatus according to another embodiment of the present invention.
18 is a diagram illustrating a computing system according to an embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. In adding reference numerals to components of each drawing, it should be noted that the same components have the same numerals as much as possible even if they are displayed on different drawings. In addition, in describing an embodiment of the present invention, if it is determined that a detailed description of a related known configuration or function hinders understanding of the embodiment of the present invention, the detailed description will be omitted.

In describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish the component from other components, and the nature, order, or order of the corresponding component is not limited by the term. In addition, unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which the present invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in the present application, they should not be interpreted in an ideal or excessively formal meaning. don't

Hereinafter, with reference to FIGS. 1 to 18, embodiments of the present invention will be described in detail.

1 is a block diagram showing the configuration of a video recording device according to an embodiment of the present invention, and FIG. 2 is a diagram showing the structure of a camera module.

Referring to FIGS. 1 and 2 , a video recording apparatus according to an embodiment of the present invention may include a camera module 100 and a cam control module 200 .

The camera module 100 is for monitoring the outside of the vehicle, and is configured as a module separate from the cam control module 200 to monitor the outside of the vehicle. The camera module 100 may be implemented in a form in which a motion detection sensor 110, an impact detection sensor 120, an image sensor 130, and a serializer (hereinafter referred to as SER) 140 are mounted in the housing 90. there is.

The motion detection sensor 110 may monitor the movement of an object outside the vehicle. The motion detection sensor 110 may be implemented as a radar, and for example, a frequency modulated continuous wave (FMCW) type radar capable of calculating a detection distance and speed of a detection target may be used.

The motion detection sensor 110 may transmit a transmission signal and detect an object based on a reception signal in which the transmission signal is reflected from the object. The motion detection sensor 110 may generate a beat signal based on a frequency difference between a transmission signal and a reception signal. Also, the motion detection sensor 110 may generate sensing data in digital form based on the bit signal. Sensing data may include information about signal strength or sensing distance.

A part of the motion detection sensor 110 that transmits radar may be exposed to the outside of the housing 90 .

The impact detection sensor 120 is for detecting a collision applied to the vehicle and may use an acceleration sensor. The impact detection sensor 120 may determine whether or not an impact is applied to the vehicle based on the amount of change in acceleration of the vehicle.

The image sensor 130 may generate an electrical signal based on light incident through the lens 131 exposed to the outside of the housing 90 . The image sensor may have a structure in which photo diodes that receive light and generate charge are arranged in a matrix form.

The SER 140 may serialize signals generated by the camera module 100 using a Low Voltage Differential Signaling (LVDS) method and output them as 2 pair differential lines.

In this way, the camera module 100 is implemented separately from the cam controller 200, so the size of the camera module 100 can be reduced. In particular, since the motion detection sensor 110 is integrated into the camera module 100 through the housing 90, the motion detection sensor 110 may not be additionally mounted in the vehicle.

The cam control module 200 is disposed outside the housing 90 of the camera module 100 and can communicate with the camera module 100 based on LVDS. The cam control module 200 may include a deserializer (hereinafter referred to as DES) 210 , a controller 220 , an image processor 230 , and a memory device 240 .

DES (210) can receive 2pair differential converted by SER (140).

The controller 220 is activated based on the movement of the object detected by the motion detection sensor 110 and can determine the movement pattern of the object. The controller 220 may receive sensing data from the motion detection sensor 110 during a unit period, and may detect target data having a signal strength greater than or equal to a threshold level or a detection distance less than a threshold distance among the sensing data. Also, the controller 220 may determine whether to activate the image processor 230 based on the number of target data and the tendency of the target data.

The image processor 230 may be activated under the control of the controller 220 and store image data obtained by the image sensor 130 in the memory device 240 . The image processor 230 may be implemented as an application processor (AP) responsible for processing application programs and graphics. Hereinafter, in embodiments of the present invention, embodiments in which the image processor 230 is implemented as an AP will be mainly described.

The memory device 240 may be included in the controller 220 and may be a separate memory. Accordingly, the memory device 240 may include a hard disk drive, flash memory, electrically erasable programmable read-only memory (EEPROM), static RAM (SRAM), ferro-electric RAM (FRAM), phase-change RAM (PRAM), MRAM ( Magnetic RAM) and/or a combination of volatile memories such as DRAM (Dynamic Random Access Memory), SDRAM (Synchronous Dynamic Random Access Memory), DDR-SDRAM (Double Date Rate-SDRAM), etc. .

3 is a diagram showing the configuration of a video recording apparatus according to another embodiment of the present invention.

Referring to FIG. 3 , a video recording device and communication means according to another embodiment are described in detail as follows. In the description of FIG. 3 , detailed descriptions of components substantially the same as those shown in FIG. 1 will be omitted.

Referring to FIG. 3 , an image recording apparatus according to an embodiment of the present invention may include a first camera module 101 , a second camera module 102 , and a cam control module 201 .

The first camera module 101 is for monitoring the front of the vehicle and includes a first motion detection sensor 111, a shock detection sensor 121, a first image sensor 131 and a first SER 141. can The first camera module 101 and the cam control module 201 may perform digital communication based on LVDS.

More specifically, the first motion detection sensor 111 may generate an interrupt based on the motion of the object, and transmit the interrupt to the first DES 211 through the first SER 141 . An interrupt by the first motion detection sensor 111 may be generated when the motion intensity of the object is greater than or equal to the threshold intensity, or when the sensing distance indicating the detected position of the object is less than the threshold distance.

Also, the first motion detection sensor 111 may transmit sensing data generated based on the motion of the object to the first DES 211 through the first SER 141 .

Also, the first image sensor 131 may acquire image data and transmit the image data to the first DES 211 through the first SER 141 .

In addition, the impact detection sensor 121 may transmit an interrupt generated by an impact applied to the vehicle to the first DES 211 through the first SER 141 . In addition, the impact detection sensor 121 may transmit data generated by an impact applied to the vehicle to the first DES 211 through the first SER 141 .

The second camera module 102 is for monitoring the rear of the vehicle and may include a second motion detection sensor 112 , a second image sensor 132 , and a second SER 142 . The configuration of the second camera module 102 may be mounted in a housing separate from the first camera module 101 . The second motion detection sensor 112 may generate an interrupt based on the movement of the object, and transmit the interrupt to the second DES 212 through the second SER 142 . An interrupt by the second motion detection sensor 112 may be generated when the movement intensity of the object is greater than or equal to the threshold intensity or when the sensing distance indicating the detected position of the object is less than the threshold distance.

The second camera module 102 and the cam control module 201 may perform digital communication based on LVDS.

The cam control module 201 may be configured separately from the first and second camera modules 101 and 102 and may communicate with the first and second camera modules 101 and 102 based on LVDS. . The cam control module 201 may include first and second DESs 211 and 212 , a controller 221 , an AP 231 , and a memory device 241 .

4 is a diagram illustrating a video recording apparatus according to another embodiment.

Referring to FIG. 4 , an image recording device according to another embodiment of the present invention may include a first camera module 101 , a second camera module 102 , and a cam control module 201 . In the embodiment shown in FIG. 4 , configurations of the first camera module 101 , the second camera module 102 , and the cam control module 201 may be the same as or similar to those of the embodiment shown in FIG. 3 .

The first SER 141 of the first camera module 101 may communicate with the first DES 211 of the cam control module 201 based on LVDS. The first motion detection sensor 111 may transmit an interrupt to the cam control module 201 through the first wire W11 and transmit sensing data to the cam control module 201 through the second wire W12. . The impact detection sensor 121 transmits an interrupt to the cam control module 201 through the third wire W13, and transmits data generated by the impact detection to the cam control module 201 through the fourth wire W14. can transmit The first image sensor 131 may transmit image data to the cam module based on LVDS.

The second motion detection sensor 112 of the second camera module 102 transmits an interrupt to the cam control module 201 through the fifth wire W21, and controls the sensing data through the sixth wire W22. module 201.

5 is a flowchart illustrating a method of controlling a video recording apparatus according to an embodiment of the present invention. The following embodiments will be described based on the video recording device shown in FIG. 3 .

Referring to FIG. 5 , a control method of a video recording apparatus according to an embodiment of the present invention is as follows.

In a first step (S510), the first and second motion detection sensors 111 and 112 may detect the movement of an external object. That is, the first and second motion sensors 111 and 112 may determine a moving object, not a fixed or stationary object. According to an embodiment of the present invention, the first and second motion detection sensors 111 and 112 transmit a transmission signal and monitor an object based on receiving a reception signal reflected from the object (RAdio Detection And It can be implemented based on the Ranging;　Radar) system.

In the second step ( S520 ), the first and second motion detection sensors 111 and 112 may activate the controller 221 based on the detection of the detected object. The first and second motion detection sensors 111 and 112 may activate the controller 221 based on detection of a moving object.

The first and second motion sensors 111 and 112 may activate the controller 221 based on the motion intensity of the object. The motion intensity may be determined according to a preset condition. The motion intensity may be calculated based on the possibility of the object colliding with the vehicle and the predicted impact amount upon collision.

According to an embodiment, the first and second motion sensors 111 and 112 may determine the motion intensity of the object based on the size of the object. For example, the first and second motion sensors 111 and 112 may determine the motion intensity of the object to be large in proportion to the size of the object.

According to another embodiment, the first and second motion sensors 111 and 112 may determine the motion intensity of the object based on the speed of the object. For example, the first and second motion sensors 111 and 112 may determine the motion intensity of the object as the speed of the object increases.

According to another embodiment, the first and second motion detection sensors 111 and 112 may determine the motion intensity of the object based on the sensing distance of the object. For example, the first and second motion detection sensors 111 and 112 may determine the motion strength of the object as the sensing distance of the object is closer.

According to an embodiment of the present invention, the first and second motion detection sensors 111 and 112 may estimate the size of the object based on the signal strength of the received signal. Also, according to an embodiment of the present invention, the first and second motion detection sensors 111 and 112 may calculate the speed of the object based on the received signal. In addition, according to an embodiment of the present invention, the sensing distance of an object can be calculated based on the received signal.

In the third step (S530), the activated controller 221 monitors the object for a unit period and determines whether to activate the AP 231 for video recording based on the monitoring of the object.

A procedure for monitoring an object during a unit period may be determined based on a change in motion intensity of the object. Therefore, the controller 221 can determine the motion pattern of the object based on the signal strength of the received signal. In addition, the controller 221 may calculate a sensing distance based on the received signal and determine a movement pattern based on a change in the sensing distance.

According to an embodiment, the controller 221 may activate the AP 231 for video recording by determining that the predicted impact of the object is large when the signal strength of the object continues beyond a certain level.

According to another embodiment, the controller 221 may activate the AP 231 for video recording by determining that the object is highly likely to collide when it is determined that the sensing distance of the object is gradually getting closer.

As described above, according to the control method of the video recording device according to the embodiment of the present invention, since the controller 221 is activated based on motion detection, there is no need for the operation of the controller 221 when the engine of the vehicle is turned off. Power consumption can be reduced. In addition, according to the method for controlling a video recording device according to an embodiment of the present invention, since the AP 231 is activated according to the type and movement of an object identified based on monitoring the object for a unit period, unnecessary video is recorded. It is possible to improve the waste of power consumed in doing this. also. According to the control method of the video recording apparatus according to the embodiment of the present invention, since the video is recorded based on the monitoring of the object for a unit period, unnecessary video can be prevented from being recorded.

6 is a flowchart illustrating a control method of a video recording apparatus according to another embodiment of the present invention. 7 to 10 are diagrams illustrating procedures for activating elements of the video recording apparatus. Hereinafter, FIGS. 6 to 10 will be described based on the video recording device shown in FIG. 3 .

A control method of a video recording apparatus according to another embodiment of the present invention will be described with reference to FIGS. 6 to 10 .

In S601, an interrupt output sensitivity can be set. Interrupt output sensitivity may refer to a motion strength criterion for detecting motion of an object by the first and second motion sensors 111 and 112 .

When the first and second motion detection sensors 111 and 112 determine an object based on the signal strength of the received signal, the procedure for setting the interrupt output sensitivity is to set the threshold strength shown in FIGS. 11 to 13 may be a procedure.

Alternatively, when the first and second motion sensors 111 and 112 determine an object based on the detection distance of the object, the procedure for setting the interrupt output sensitivity sets the threshold distance shown in FIGS. 14 to 16 It may be a procedure to

6 shows that the procedure for setting the interrupt output sensitivity is after the ignition is turned off, but the sequence of the procedure for setting the interrupt output sensitivity is not limited thereto. Although the procedure for setting the interrupt output sensitivity may generally be performed before S602 described later, any procedure may be involved in the operation of the video recording device.

In S602 and S603, based on the fact that the engine is turned off, the first and second motion detection sensors 111 and 112 are activated to monitor an external object.

A procedure for activating the first and second motion sensors 111 and 112 may include a procedure for inactivating units other than the first and second motion sensors 111 and 112 . For example, as shown in FIG. 7 , the first and second motion detection sensors 111 and 112 are activated based on the fact that the engine is turned off, and at the same time, the shock detection sensor 121 and the first and second image sensors 131 and 132, the first and second SERs 141 and 142, the first and second DESs 211 and 212, the controller 221, and the AP 231 are turned off and in an inactive state. can enter

The step of monitoring the external object by the first and second motion detection sensors 111 and 112 may be performed based on a received signal from the radar. The first and second motion detection sensors 111 and 112 may obtain sensing data in digital form at regular intervals based on the received signal of the radar, and based on the sensing data, the signal strength of the received signal or the contact with the object may be determined. Sensing distance can be judged.

In S604, the first and second motion sensors 111 and 112 may determine whether the object motion intensity is greater than or equal to the threshold intensity. The motion strength may be determined based on the signal strength or the detection distance of the object. That is, the first and second motion detection sensors 111 and 112 may monitor the signal strength of the received signal or the detection distance of the object based on the sensing data.

In operation S605, the first motion detection sensor 111 or the second motion detection sensor 112 may output an activation signal based on the detection of the motion of an object having a motion intensity greater than or equal to a threshold intensity.

According to an embodiment, the first motion detection sensor 111 or the second motion detection sensor 112 may determine that the motion intensity is greater than or equal to the threshold intensity based on the fact that the signal intensity is greater than or equal to the threshold intensity.

According to another embodiment, the first motion detection sensor 111 or the second motion detection sensor 112 may determine that the motion intensity is greater than or equal to the threshold intensity based on the fact that the distance of the object is less than the threshold distance.

The first motion detection sensor 111 or the second motion detection sensor 112 may generate an interrupt based on a motion intensity greater than or equal to a threshold intensity. Based on the interrupt generation, the first motion detection sensor 111 transmits an activation signal to the first SER 141 in a digital output method, or the second motion detection sensor 112 is activated in a digital output method A signal may be transmitted to the second SER 142 . For example, as shown in FIG. 8 , when the first motion detection sensor 111 detects a movement of a threshold intensity or more, the first motion detection sensor 111 transmits an activation signal to the first SER 141 in a digital output method. can Hereinafter, a method of controlling the video recording device based on the activated state of the first motion detection sensor 111 will be described.

At S606, based on the received interrupt, the controller 221 can be activated. Upon receiving the activation signal, the first SER 141 may transmit the activation signal to the first DES 211 based on LVDS. Also, as shown in FIG. 9 , the first DES 211 may transmit an activation signal to the controller 221 in a digital output method.

In S607, the controller 221 may receive sensing data and determine the necessity of video recording based on the sensing data, as shown in FIG. 9 . The controller 221 may determine the need for video recording based on the motion pattern of the object.

To this end, the controller 221 may receive sensing data from the first motion detection sensor 111 during a unit period. The controller 221 may detect target data based on the signal strength or sensing distance of each of the sensing data received during the unit period. The controller 221 may determine a motion pattern of an object based on target data.

In S608, the controller 221 may activate the AP 231 as shown in FIG. 10 according to the result of determining the motion pattern of the object based on the sensing data. The activated AP 231 may store image data acquired by the image sensor in the memory device 241 .

In S609, the controller 221 may deactivate the AP according to the result of determining the motion pattern of the object based on the sensing data.

A procedure for deactivating the AP may include a procedure for deactivating the controller again based on the activation time of the controller 221 ( S609 and S610 ). That is, in S609, the controller 221 checks the duration of activation (S609), and may enter the inactive state based on the fact that the activation time is greater than or equal to the threshold time (S610).

Referring to FIGS. 11 to 16, an embodiment of a process of entering a procedure S608 or S609 according to the determination in S607 is as follows.

11 to 13 are diagrams for explaining an embodiment of determining whether to activate an AP according to signal strength of sensing data, respectively.

Referring to FIG. 11 , the controller 221 may receive sensing data during a unit period based on detection of an interrupt. The controller 221 may detect target data having a signal strength greater than or equal to a threshold strength among the sensing data. Also, the controller 221 may maintain an inactive state of the AP 231 based on the fact that the number of target data is less than the first threshold.

As the first threshold value increases, the possibility of an unwanted image being recorded decreases, but there is a possibility that an image that needs to be recorded is not recorded. Alternatively, the smaller the first threshold value is, the higher the possibility that an unwanted image is recorded, but the possibility that an image that needs to be recorded is omitted may be reduced. Accordingly, the first threshold may be set by adjusting the possibility of missing an image requiring recording and the possibility of recording an unnecessary image.

Referring to FIG. 12 , the controller 221 may receive sensing data during a unit period based on detection of an interrupt. The controller 221 may detect target data having a signal strength greater than or equal to a threshold strength among the sensing data.

The controller 221 can determine the signal strength trend of the target data. As shown in FIG. 12, if the magnitude of the signal strength of the target data has a tendency to gradually decrease, the controller 221 may determine inactivation of the AP 231. The tendency of the signal strength may be determined based on the deviation of the signal strength between adjacent target data. For example, the controller 231 calculates the signal strength deviation between the n+1 (n is a natural number) th target data and the n th target data among the target data during the unit period, and calculates 0 (zero) or 0 (zero) or Based on the fact that the number of negative values is greater than or equal to the fifth threshold, it can be determined that the signal strength of the target data tends to decrease.

As the fifth threshold value increases, the possibility of an unwanted image being recorded decreases, but there is a possibility that an image that needs to be recorded is not recorded. Alternatively, as the fifth threshold value is smaller, there is a higher possibility that an unwanted image is recorded, but a possibility that an image requiring recording is omitted may be reduced. Accordingly, the fifth threshold may be set by adjusting the possibility of missing an image requiring recording and the possibility of an unnecessary image being recorded.

Referring to FIG. 13 , the controller 221 may receive sensing data during a unit period based on detection of an interrupt. The controller 221 may detect target data having a signal strength greater than or equal to a threshold strength among the sensing data.

The controller 221 can determine the signal strength trend of the target data. As shown in FIG. 13, if the signal strength of the target data tends to be maintained or increased, the controller 221 may determine activation of the AP. The tendency of the signal strength may be determined based on the deviation of the signal strength between adjacent target data. The controller 231 calculates the signal strength deviation between the n+1 (n is a natural number) th target data and the n th target data among the target data during the unit period, and the number of positive values among the signal strength deviations is a third threshold. Based on the above value, it can be determined that the signal strength of the target data has a tendency to increase.

That is, the controller 221 may activate the image processor 231 based on the fact that the number of positive values among the signal strength deviations is greater than or equal to the third threshold. FIGS. It is a diagram for explaining an embodiment of determining whether to activate an AP according to.

Referring to FIG. 14 , the controller 221 may receive sensing data during a unit period based on detection of an interrupt. The controller 221 may detect target data having a sensing distance less than a critical distance from among the sensing data. Also, the controller 221 may determine inactivation of the AP 231 based on the fact that the number of target data is less than the second threshold.

As the second threshold value increases, the possibility of unwanted images being recorded decreases, but there is a possibility that images that need to be recorded are not recorded. Alternatively, the smaller the second threshold, the higher the possibility that an unwanted image is recorded, but the possibility that an image that needs to be recorded is omitted may be reduced. Accordingly, the second threshold may be set by adjusting the possibility of missing an image requiring recording and the possibility of an unnecessary image being recorded.

Referring to FIG. 15 , the controller 221 may receive sensing data during a unit period based on detection of an interrupt. The controller 221 may detect target data having a sensing distance less than a critical distance from among the sensing data.

The controller 221 can determine the signal strength trend of the target data. As shown in FIG. 15 , if the sensing distance of the target data tends to gradually increase, the controller 221 may determine to deactivate the AP. The tendency of the sensing distance may be determined based on the deviation of the sensing distance between adjacent target data. For example, the controller 221 calculates the sensing distance deviation between the n+1 (n is a natural number) th target data and the n th target data among the target data during the unit period, and calculates the number of positive values among the sensing distance deviations. Based on the fact that is equal to or greater than the sixth threshold, it may be determined that the detection distance of the target data tends to increase.

As the sixth threshold value increases, the possibility of an unwanted image being recorded decreases, but there is a possibility that an image that needs to be recorded is not recorded. Alternatively, the smaller the sixth threshold, the higher the possibility that an unwanted image will be recorded, but the lower the possibility that an image that needs to be recorded will be omitted. Accordingly, the sixth threshold may be set by adjusting the possibility of missing an image requiring recording and the possibility of an unnecessary image being recorded.

Referring to FIG. 16 , the controller 221 may receive sensing data during a unit period based on detection of an interrupt. The controller 221 may detect target data having a sensing distance less than a critical distance from among the sensing data.

The controller 221 may determine the tendency of the sensing distance. As shown in FIG. 16, if the sensing distance of the target data is maintained or has a tendency to become closer, the controller 221 may determine activation of the AP. The tendency of the sensing distance may be determined based on the deviation of the sensing distance between adjacent target data. For example, the controller 221 calculates the sensing distance deviation between the n+1 (n is a natural number) th target data and the n th target data among the target data during the unit period, and calculates 0 (zero) or 0 (zero) or Based on the fact that the number of negative values is greater than or equal to the fourth threshold, it may be determined that the detection distance of the target data tends to become closer. That is, the controller 221 may activate the AP 231 based on the fact that the number of zero or negative values among the sensing distance deviations is equal to or greater than the fourth threshold value.

17 is a flowchart illustrating a control method of a video recording apparatus according to another embodiment of the present invention. In particular, FIG. 17 is a flowchart illustrating a procedure after AP activation.

Referring to FIG. 17 , a control method of a video recording device after activation of an AP is as follows.

In S1701, based on activation of the AP, it is possible to check whether the continuous recording function is set.

In S1702, when the continuous recording function is set, the AP can control real-time video recording. That is, the image data acquired by the image sensor may be stored in time series.

In S1703, the AP 231 may check whether the impact detection recording function is set.

In S1704, based on the fact that the shock detection recording function is set, the AP 231 may monitor the shock detection sensor 121. In addition, the AP 231 may record an image when an impact is applied to the vehicle by the impact detection sensor 121 .

In S1705, when the continuous recording function or the impact detection function is not set, the first and second motion sensors 111 and 112 may continue to monitor the motion of the object.

In S1706 and S1707, when target data is not detected among the sensing data for the reference time, units other than the first and second motion detection sensors 111 and 112 may enter an inactive state. That is, as in S602 shown in FIG. 6, the impact detection sensor 120, the first and second image sensors 131 and 132, the first and second SERs 141 and 142, and the first and second image sensors 131 and 132 The 2 DESs 211 and 212, the controller 221 and the AP 231 may be switched to an inactive state.

Hereinafter, operations and effects of the video recording apparatus according to an embodiment of the present invention will be described. The following description will be made based on FIG. 1 to which one camera module is applied.

According to an embodiment of the present invention, it is possible to prevent video recording from being performed due to non-threatening natural phenomena. Snow, rain, fallen leaves, etc. may not be detected as objects depending on the interrupt output sensitivity setting. However, an interrupt may be generated in the motion detection sensor 110 by an object such as snow, rain, or fallen leaves due to a sensing error or a specific matter. Since signal strength due to snow, rain, fallen leaves, etc. is generally not determined as target data, target data due to such natural phenomena may be sporadic. According to an embodiment of the present invention, the AP 130 may not be activated by sporadic target data as shown in FIG. 11 . Accordingly, it is possible to prevent video recording from being performed as a natural phenomenon that is not threatening.

According to an embodiment of the present invention, it is possible to prevent image recording from being performed by a pedestrian who is far away or is moving away.

An interrupt is sensed by a pedestrian or a vehicle, and the controller 220 may be activated. The controller 220 may not activate the AP 230 for video recording when the objects are maintained at a distance as in FIG. 14 or when the objects are far away as in FIG. 15 . Accordingly, it is possible to reduce power consumption and memory space waste due to unnecessary image recording.

Video recording due to vehicle collision may proceed as shown in FIG. 16 .

When the detection distance of the object is far, the motion detection sensor 110 does not generate an interrupt. When an interrupt occurs because the detection distance is close, the controller 220 is activated and may monitor the object for a unit period. Since the object gradually approaches the vehicle, the controller 220 may activate the AP 230 and record video.

According to the preset video recording function, the AP 230 can record continuous video from the point of activation. Alternatively, the AP 230 may record an image based on the impact detection sensor 120 detecting a collision.

While video recording is performed by the AP 230, the motion detection sensor 110 may continue to monitor the object. As a result of the monitoring, when the motion intensity is less than a certain level, units other than the motion detection sensor 110 may enter an inactive state.

18 illustrates a computing system according to one embodiment of the present invention.

Referring to FIG. 18 , a computing system 1000 includes at least one processor 1100, a memory 1300, a user interface input device 1400, a user interface output device 1500, and a storage connected through a bus 1200. 1600, and a network interface 1700.

The processor 1100 may be a central processing unit (CPU) or a semiconductor device that processes commands stored in the memory 1300 and/or the storage 1600 . In particular, the processor 1100 according to an embodiment of the present invention may include the cam control module 200. The memory 1300 and the storage 1600 may include various types of volatile or nonvolatile storage media. For example, the memory 1300 may include read only memory (ROM) and random access memory (RAM).

Accordingly, the steps of a method or algorithm described in connection with the embodiments disclosed herein may be directly implemented as hardware executed by the processor 1100, a software module, or a combination of the two. A software module resides in a storage medium (i.e., memory 1300 and/or storage 1600) such as RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, or a CD-ROM. You may.

An exemplary storage medium is coupled to the processor 1100, and the processor 1100 can read information from, and write information to, the storage medium. Alternatively, the storage medium may be integral with the processor 1100. The processor and storage medium may reside within an application specific integrated circuit (ASIC). An ASIC may reside within a user terminal. Alternatively, the processor and storage medium may reside as separate components within a user terminal.

The above description is merely an example of the technical idea of the present invention, and various modifications and variations can be made to those skilled in the art without departing from the essential characteristics of the present invention.

Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed according to the claims below, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

Claims (20)

A motion detection sensor detecting movement of an object outside the vehicle;
a controller that is activated based on the motion detection sensor detecting the object and monitors the object through the motion detection sensor for a unit period; and
an image processor that is activated based on a result of monitoring the object and performs a video recording function;
Video recording device comprising a.
According to claim 1,
The video recording device according to claim 1 , wherein the controller and the image processor enter an inactive state based on that the engine of the vehicle is turned off.
According to claim 1,
The motion detection sensor
An image recording device characterized in that it obtains sensing data in digital form at regular intervals based on a received signal from a radar, and determines the signal strength of the received signal or the sensing distance of the object based on the sensing data.
According to claim 3,
The motion detection sensor
The motion detection sensor generates an activation signal for activating the controller based on whether the signal strength is greater than or equal to the critical strength or the sensing distance is less than the critical distance, and the activation signal is generated based on LVDS (Low Voltage Differential Signaling). Video recording device characterized in that for transmitting to the controller.
According to claim 3,
The controller
Receiving the sensing data from the motion detection sensor during the unit period, detecting target data in which the signal strength has a magnitude greater than or equal to the threshold strength or the detection distance is less than the threshold distance among the sensing data, and The video recording device according to claim 1 , wherein the video processor is activated or an inactive state of the video processor is maintained.
According to claim 5,
The controller
When the number of target data whose signal strength is greater than or equal to the threshold is less than a first threshold, or when the number of target data whose detection distance is less than the threshold is less than a second threshold, an inactive state of the image processor A video recording device characterized in that for maintaining.
According to claim 5,
The controller
A signal strength deviation between an n+1 (n is a natural number) th target data and an n th target data among the target data during the unit period is calculated, and the number of positive values among the signal strength deviations is equal to or greater than a third threshold. Based on the above, the image recording device characterized in that for activating the image processor.
According to claim 5,
The controller
The detection distance deviation between n+1 (n is a natural number) th target data and n th target data among the target data during the unit period is calculated, and the number of 0 (zero) or negative values among the detection distance deviations The video recording apparatus according to claim 1 , wherein the image processor is activated based on the fact that is greater than or equal to a fourth threshold.
According to claim 1,
The controller
The video recording apparatus according to claim 1 , wherein the image processor enters an inactive state based on the decision to maintain the inactive state.
According to claim 1,
an image sensor activated under the control of the image processor to obtain an image; and
a memory device storing the image acquired by the image sensor;
Video recording device characterized in that it further comprises.
detecting motion of an external object by a motion detection sensor of the camera module;
activating a controller of a cam control module based on the detection of the object; and
selectively activating, by the controller, an image processor for image recording based on monitoring of the object during a unit period;
Control method of a video recording device comprising a.
According to claim 11,
The step of detecting the movement of the external object
inactivating the controller and the image processor based on that the engine of the vehicle is turned off;
A control method of a video recording device, characterized in that it further comprises.
According to claim 11,
The step of detecting the movement of the object,
Acquiring sensing data in digital form at regular intervals based on the received signal of the radar; and
determining the signal strength of the received signal or the sensing distance of the object based on the sensing data;
A control method of a video recording device comprising a.
According to claim 13,
Activating the controller,
generating, by the motion detection sensor, an activation signal for activating the controller, based on whether the signal strength is greater than or equal to the threshold strength or the sensing distance is less than the critical distance; and
Transmitting the activation signal to the controller based on LVDS;
A control method of a video recording device comprising a.
15. The method of claim 14,
Selectively activating the image processor
receiving the sensing data from the motion detection sensor during the unit period based on activation of the controller;
detecting target data having the signal strength greater than or equal to the threshold strength or the detection distance less than the threshold distance among the sensing data during the unit period; and
activating the image processor based on the target data or maintaining an inactive state of the image processor;
A control method of a video recording device, characterized in that it further comprises.
According to claim 15,
Maintaining the inactive state of the image processor
When the number of target data whose signal strength is greater than or equal to the threshold strength is less than a first threshold, or when the number of target data whose detection distance is less than the threshold distance is less than a second threshold, characterized in that Control method of video recording device.
According to claim 15,
Activating the image processor
calculating a signal strength deviation between n+1 (n is a natural number) th target data and n th target data among the target data during the unit period; and
activating the image processor based on the fact that the number of positive values among the signal strength deviations is greater than or equal to a third threshold;
A method of controlling a video recording device, further comprising the steps of:
According to claim 15,
Activating the image processor
calculating the detection distance deviation between n+1 (n is a natural number) th target data and n th target data among the target data during the unit period; and
Activating the image processor based on the fact that the number of zero or negative values among the sensing distance deviations is greater than or equal to a fourth threshold value;
A control method of a video recording device, characterized in that it further comprises.
According to claim 11,
Selectively activating the image processor further includes maintaining an inactive state of the image processor based on sensing of the motion sensor,
The control method of a video recording apparatus according to claim 1 , wherein the activated controller enters an inactive state when the inactivation of the image processor is maintained.
According to claim 11,
The method of controlling a video recording device according to claim 1 , further comprising storing an image signal acquired by an image sensor of the camera module in a storage device based on activation of the image processor.

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