JP2024059804A - Imaging device, control method, program, and storage medium - Google Patents

Abstract

[Problem] To provide an imaging device capable of capturing images in response to vibrations in a plurality of modes. [Solution] The imaging device 1 includes an attachment unit 3 that can be attached to a vehicle, a camera (imaging unit) 6, a vibration sensor 12, and a control unit 19. The camera 6 is configured to be rotatable with respect to the attachment unit 3. The control unit 19 switches between a mode in which an abnormality determination is made using a second threshold value when the portable terminal 2 is not attached, and a mode in which an abnormality determination is made using a first threshold value that is higher than the second threshold value when the portable terminal 2 is attached, in response to the rotation of the camera 6 by an actuator 14. [Selected Figure] Figure 6

Description

The present invention relates to a technology for determining abnormalities based on vibration.

Technologies related to drive recorders have been proposed in the past. For example, Patent Document 1 discloses technology that allows a camera-equipped mobile terminal to function as a drive recorder. Patent Document 2 discloses an in-vehicle camera device in which a camera is mounted at the tip of a flexible arm installed inside the vehicle.

JP 2007-300150 A JP 2012-96687 A

When a mobile phone camera is used as a camera for recording in a drive recorder as in Patent Document 1, there is a problem that the high angle is narrower and brighter images cannot be captured than with a typical drive recorder camera. In addition, with the spread of smartphones, there is an increasing demand for holders for placing smartphones in the vehicle interior, but there is a problem that the installation space required to install the drive recorder and the holder described above separately makes the vehicle interior more cluttered. There is also an increasing demand for security cameras that record images inside the vehicle when the vehicle is parked, and it would be convenient for users if there was a device that could appropriately record images inside and outside the vehicle interior in the installation space of one vehicle.

The present invention has been made to solve the above problems, and its main objective is to provide an imaging device that can capture images in response to vibrations using multiple modes.

The invention described in the claims is an imaging device that can be attached to a moving body, and includes a support section that detachably supports a display terminal, an imaging section that can rotate the imaging direction, an acceleration sensor, and a control section that, when the support section supports the display terminal, executes a second mode in which recording of an image captured by the imaging section starts when an output signal of the acceleration sensor indicates a first threshold value or higher, and, when the display terminal is removed from the support section, executes a first mode in which recording of an image captured by the imaging section starts when an output signal of the acceleration sensor indicates a second threshold value or higher that is lower than the first threshold value.

The invention described in the claims is a control method executed by an imaging device that is mountable to a moving body and includes a support section that detachably supports a display terminal, an imaging section that can rotate the imaging direction, and an acceleration sensor, and includes a control step of executing a second mode in which recording of an image captured by the imaging section starts when the output signal of the acceleration sensor indicates a first threshold value or higher when the display terminal is removed from the support section, and executing a first mode in which recording of an image captured by the imaging section starts when the output signal of the acceleration sensor indicates a second threshold value or higher that is lower than the first threshold value when the display terminal is removed from the support section.

The invention described in the claims is a program executed by a computer of an imaging device that is mountable to a moving body and includes a support section that detachably supports a display terminal, an imaging section that can rotate the imaging direction, and an acceleration sensor, and causes the computer to function as a control section that, when the support section supports the display terminal, executes a second mode in which recording of an image captured by the imaging section starts when the output signal of the acceleration sensor indicates a first threshold value or higher, and, when the display terminal is removed from the support section, executes a first mode in which recording of an image captured by the imaging section starts when the output signal of the acceleration sensor indicates a second threshold value or higher that is lower than the first threshold value.

1 shows a state in which the imaging device holds a mobile terminal. FIG. 2 is a functional block diagram of the imaging device. 11 shows states before and after the housing is rotated when the mobile terminal is detached from the imaging device. 11 shows states before and after rotation of a housing when a portable terminal is attached to an imaging device. FIG. 4 is a flowchart showing a processing procedure of the imaging device.

In one preferred embodiment of the present invention, the imaging device includes a vibration detection unit that detects vibrations, an attachment unit that can be attached to a moving body, an imaging unit that can rotate with respect to the attachment unit, and a control unit that switches between a first mode in which recording is started in response to the vibrations and a second mode in which the vibration threshold for starting the recording is higher than that of the first mode in response to the rotation of the imaging unit.

The imaging device includes a vibration detection unit that detects vibrations, an attachment unit that can be attached to a moving body, an imaging unit, and a control unit. The imaging unit is configured to be rotatable with respect to the attachment unit. The control unit switches between a first mode in which recording is started in response to vibrations and a second mode in which the vibration threshold for starting recording is higher than that in the first mode in response to the rotation of the imaging unit. In this way, the imaging device can accurately perform the required recording in each mode by switching between the first mode and the second mode, which have different vibration thresholds, in response to the rotation of the imaging unit.

In one aspect of the imaging device, the imaging device includes a housing that houses the imaging unit, the housing houses the imaging unit at a first end and has a support unit that detachably supports a display terminal at a second end different from the first end, and the control unit executes the first mode when the display terminal is removed from the support unit, and executes the second mode when the support unit supports the display terminal. In general, when the display terminal is removed from the support unit, it is predicted that the moving object is stopped and that steady vibration is small, and when the display terminal is supported by the support unit, it is predicted that the moving object is moving and that steady vibration is large. Taking the above into consideration, the control unit can preferably suppress erroneous determination of steady vibration associated with movement as an abnormality by setting a higher vibration threshold value than that of the first mode in the second mode executed when the display terminal is supported by the support unit.

In another aspect of the imaging device, the imaging device includes a first transmission unit that transmits an image captured by the imaging unit to the display terminal in the second mode. In this aspect, the imaging device transmits an image captured by the imaging unit to the display terminal while the display terminal is supported by a support unit, thereby enabling the display terminal to preferably display an image based on the image captured by the imaging unit.

In another aspect of the imaging device, the imaging device includes a second transmission unit that transmits information indicating an abnormality to the display terminal when the vibration detected by the vibration detection unit becomes equal to or exceeds the vibration threshold for starting the recording in the first mode. With this aspect, the imaging device can appropriately notify the user of the display terminal of an abnormality in the moving object when it is expected that the display terminal and its user are located away from the moving object.

In another aspect of the imaging device, the control unit changes at least one of the imaging sensitivity, F-number, or focal length of the imaging unit in response to the rotation of the imaging unit. With this aspect, the imaging device is able to capture a clear image using the imaging unit even if the imaging direction of the imaging unit changes.

In another aspect of the imaging device, the imaging device further includes a rotation control unit that rotates the imaging unit in response to mounting or dismounting of the display terminal. With this aspect, the imaging device can suitably switch between the first mode and the second mode.

In another embodiment of the present invention, the imaging device includes a vibration detection unit that detects vibrations, an attachment unit that can be attached to a vehicle, an imaging unit that can rotate relative to the attachment unit, and a control unit that starts recording in response to the vibrations, and the control unit switches between a first mode in which the imaging unit captures an image of the interior of the vehicle and a second mode in which the imaging unit captures an image of the exterior of the vehicle in response to the rotation of the imaging unit, and the vibration threshold for starting recording in the second mode is higher than that in the first mode. With this aspect, the imaging device can start recording at appropriate times in both the first mode in which the exterior of the vehicle is captured and the second mode in which the exterior of the vehicle is captured.

In another embodiment of the present invention, a control method is executed by an imaging device that includes a vibration detection unit that detects vibrations, an attachment unit that can be attached to a moving body, and an imaging unit that can rotate relative to the attachment unit, and includes a control step of switching, in response to the rotation of the imaging unit, between a first mode that starts recording in response to the vibrations and a second mode in which the vibration threshold for starting the recording is higher than that of the first mode. By executing this control method, the imaging device can switch between the first mode and the second mode, which have different vibration thresholds, in response to the rotation of the imaging unit, and accurately perform the required recording in each mode.

In another embodiment of the present invention, a program executed by a computer of an imaging device including a vibration detection unit that detects vibrations, an attachment unit that can be attached to a moving body, and an imaging unit that can rotate relative to the attachment unit causes the computer to function as a control unit that switches between a first mode in which recording is started in response to the vibrations and a second mode in which the vibration threshold for starting the recording is higher than that of the first mode in response to the rotation of the imaging unit. By executing this program, the computer can switch between the first mode and the second mode, which have different vibration thresholds in response to the rotation of the imaging unit, and accurately perform the necessary recording in each mode.

In another embodiment of the present invention, a program executed by a computer of an imaging device including a vibration detection unit that detects vibrations, an attachment unit that can be attached to a moving body, and an imaging unit that can rotate with respect to the attachment unit causes the computer to function as a control unit that starts recording in response to the vibrations, a first transmission unit that transmits an image captured by the imaging unit to the display terminal when a display terminal is attached, and a second transmission unit that transmits information indicating an abnormality to the display terminal when the vibration detected by the vibration detection unit exceeds the vibration threshold for starting the recording when the display terminal is not attached. By executing this program, the computer can supply an image required for displaying the display terminal when the display terminal is attached, and can preferably notify the display terminal of information indicating an abnormality when the display terminal is not attached. Preferably, the above program is stored in a storage medium.

Below, preferred embodiments of the present invention will be described with reference to the drawings.

[Configuration of the imaging device]
1A, 1B, and 1C show a state in which an imaging device 1 to which the imaging device according to the present invention is applied holds a mobile terminal 2. Fig. 1A is a diagram of the imaging device 1 and the mobile terminal 2 observed from the front (i.e., the display side of the mobile terminal 2), and Fig. 1B is a diagram of the imaging device 1 and the mobile terminal 2 observed from the back. Fig. 1C is a diagram of the imaging device 1 and the mobile terminal 2 observed from the side. As will be described later, the imaging device 1 is installed on the dashboard of a vehicle, and functions as a normal drive recorder when the mobile terminal 2 is attached, and functions as a security camera that detects abnormalities inside the vehicle when the mobile terminal 2 is not attached.

As shown in Figures 1 (A) to (C), the imaging device 1 mainly comprises an attachment section 3, an arm 4, and a housing section 5. The attachment section 3 has a generally disk-like shape, and is fixed with its bottom surface in surface contact with an installation surface, such as the dashboard of a vehicle, to which the imaging device 1 is attached. One end of the arm 4 is connected to the attachment section 3, and the other end is connected to the housing section 5.

The housing 5 has a generally cylindrical shape and is supported by the arm 4. As described below, the housing 5 is connected to the arm 4 in a manner that allows it to rotate in a direction generally parallel to the installation surface of the imaging device 1. A camera 6 for taking pictures is provided at one end of the housing 5, and a magnet unit 8 for generating a magnetic field is provided at the end of the housing 5 opposite the end where the camera 6 is provided. The magnet unit 8 is fitted into a groove in a magnetic body 10 attached to the back of the mobile terminal 2. Here, the magnetic body 10 is a ferromagnetic body such as iron. Thus, the magnet unit 8 supports the magnetic body 10 and the mobile terminal 2 to which the magnetic body 10 is attached by magnetic force while being fitted into the magnetic body 10. The camera 6 is an example of the "imaging unit" in this invention, and the magnet unit 8 is an example of the "support unit" in this invention.

The mobile terminal 2 is a display terminal having a display such as a smartphone, and a magnetic body 10 is attached to the back surface of the mobile terminal 2. The surface of the magnetic body 10 attached to the mobile terminal 2 has, for example, adhesiveness or adhesiveness, and is attached to any position on the back surface of the mobile terminal 2. In the example of FIG. 1, the mobile terminal 2 is fixed to the housing 5 of the imaging device 1 by the magnetic force of the magnet part 8 that attracts the magnetic body 10. A navigation application capable of executing processing linked with the imaging device 1 is installed in the mobile terminal 2. For example, in a mounted state fixed to the housing part 5 of the imaging device 1, the mobile terminal 2 receives an image captured by the camera 6 of the imaging device 1 from the imaging device 1 based on the above-mentioned application and displays it on the display. In the example of FIG. 1(A), the mobile terminal 2 displays an image of the scenery ahead of the vehicle captured by the camera 6 on the display.

Figure 2 is a functional block diagram of the imaging device 1. As shown in Figure 2, the imaging device 1 includes a camera 6, a GPS receiver 11, a vibration sensor 12, an attachment/detachment sensor 13, an actuator 14, a short-range communication unit 15, a network communication unit 16, a RAM 17, and a non-volatile memory 18.

The GPS receiver 11 generates current location information indicating the current location by receiving radio waves carrying downlink data including positioning data from multiple GPS satellites. The vibration sensor 12 is, for example, an acceleration sensor, and supplies a detection signal (also called "vibration detection signal S1") corresponding to the magnitude of vibration to the control unit 19. The measure of the magnitude of vibration detected by the vibration sensor 12 may be any of displacement, velocity, and acceleration. The vibration sensor 12 is an example of a "vibration detection unit" in the present invention.

The attachment/detachment sensor 13 detects the attachment or detachment of the portable terminal 2 to the imaging device 1, and supplies a detection signal (also called "attachment/detachment detection signal S2") indicating that the portable terminal 2 has been attached or detached to the control unit 19. The attachment/detachment sensor 13 may be, for example, an electrical signal generated by a switch or the like formed in a groove of the magnetic body 10 into which the magnet part 8 is fitted, and pressed by the magnet part 8 when the magnet part 8 is fitted into the magnetic body 10.

When the portable terminal 2 is attached to or detached from the imaging device 1, the actuator 14 rotates the housing 5 by a predetermined angle horizontally to the installation surface of the imaging device 1 under the control of the control unit 19. Figures 3 (A) and (B) show the state of the housing 5 before and after rotation when the portable terminal 2 is removed from the imaging device 1. As shown in Figures 3 (A) and (B), when the portable terminal 2 is removed from the imaging device 1, the actuator 14 rotates the housing 5 by about 180 degrees around the connection part with the arm 4 as an axis under the control of the control unit 19. As a result, the actuator 14 directs the camera 6 in the direction in which the display of the portable terminal 2 was facing when the portable terminal 2 was attached (i.e., the direction in which the interior of the vehicle is the shooting range). Figures 4 (A) and (B) show the state of the housing 5 before and after rotation when the portable terminal 2 is attached to the imaging device 1. As shown in Figures 4(A) and (B), when the mobile terminal 2 is attached to the imaging device 1, the actuator 14 rotates the housing 5 about 180 degrees around the connection part with the arm 4 under the control of the control unit 19. As a result, the actuator 14 points the camera 6 in the opposite direction to Figure 4(A) (i.e., in a direction in which the imaging range is the front of the vehicle, which is outside the passenger compartment). The actuator 14 is an example of a "rotation control unit" in the present invention.

Referring again to FIG. 2, each component of the imaging device 1 will be described. The short-range communication unit 15 performs short-range data communication with the portable terminal 2 attached to the imaging device 1 under the control of the control unit 19. The communication by the short-range communication unit 15 is, for example, short-range wireless communication such as NFC (Near Field Communication) or Bluetooth (registered trademark). In this embodiment, the short-range communication unit 15 transmits an image captured by the camera 6 to the portable terminal 2 when the portable terminal 2 is attached.

The network communication unit 16 performs data communication via a network with the mobile terminal 2 that is detached from the imaging device 1 under the control of the control unit 19. In this embodiment, as described below, when the control unit 19 detects an abnormality while the mobile terminal 2 is detached from the imaging device 1, the network communication unit 16 transmits information notifying the abnormality (also called "abnormality notification information") to the mobile terminal 2.

The RAM 17 is a storage area that functions as an image buffer or the like that temporarily stores images generated by the camera 6 under the control of the control unit 19. The non-volatile memory 18 is a storage medium such as an internal flash memory or an SD card. For example, when the control unit 19 detects an abnormality such as dangerous driving, the control unit 19 writes images stored in the RAM 17 for a predetermined time period before the abnormality was detected into the non-volatile memory 18. The non-volatile memory 18 also stores information on the communication address of the mobile terminal 2 for communication between the mobile terminal 2 and the network communication unit 16, information on threshold values used for abnormality determination based on vibration (described later), and information on the settings of the camera 6.

The control unit 19 is a CPU or the like, and controls the entire imaging device 1. For example, when the control unit 19 detects the attachment or detachment of the mobile terminal 2 to the imaging device 1 based on the attachment or detachment detection signal S2 output by the attachment or detachment sensor 13, the control unit 19 controls the actuator 14. As a result, the control unit 19 controls the orientation of the camera 6 as described in FIG. 3 and FIG. 4. Furthermore, when the magnitude of the vibration indicated by the vibration detection signal S1 supplied from the vibration sensor 12 exceeds a predetermined threshold (also called the "determination threshold"), the control unit 19 determines that an abnormality has occurred, and writes images stored in the RAM 17 for a predetermined time period before the abnormality was detected into the non-volatile memory 18 (i.e., performs recording). The control unit 19 is an example of a "control unit", "first transmission unit", "second transmission unit" and a computer that executes a program in the present invention.

[Abnormality Judgment Processing]
Next, the abnormality determination process executed by the control unit 19 will be described. In summary, the control unit 19 sets a determination threshold value used when the portable terminal 2 is in a worn state higher than a determination threshold value used when the portable terminal 2 is in an unworn state. This allows the control unit 19 to accurately detect the occurrence of an abnormality in each of the worn and unworn states of the portable terminal 2.

5(A) is a schematic diagram of the interior of the vehicle with the mobile terminal 2 attached. In the example of FIG. 5(A), the imaging device 1 is installed on the dashboard 29, and the driver attaches the mobile terminal 2 to the imaging device 1. In this case, the camera 6 is directed toward the front window 25, and the display of the mobile terminal 2 attached on the opposite side of the camera 6 is directed toward the driver in the vehicle. In the attached state of the mobile terminal 2 shown in FIG. 5(A), the control unit 19 transmits an image generated by the camera 6 to the mobile terminal 2 via the short-range communication unit 15. In this case, in the first example, the mobile terminal 2 displays an image received from the imaging device 1 on the display. At this time, the mobile terminal 2 may display an image for assisting driving by superimposing it on the displayed image. In the second example, the mobile terminal 2 stores the image received from the imaging device 1 in a storage medium. In this way, the control unit 19 transmits the image generated by the camera 6 to the mobile terminal 2 via the short-range communication unit 15, thereby allowing the image generated by the camera 6 to be suitably displayed or stored in the mobile terminal 2.

In addition, in the attached state of the mobile terminal 2 shown in FIG. 5(A), the imaging device 1 functions as a drive recorder. Specifically, when the magnitude of vibration indicated by the vibration detection signal S1 supplied from the vibration sensor 12 exceeds the judgment threshold, the control unit 19 judges that an abnormality has occurred, and writes images stored in the RAM 17 for a predetermined time before the abnormality is detected to the non-volatile memory 18. At this time, the control unit 19 sets the judgment threshold to a threshold (also called the "first threshold") for judging dangerous driving (including collisions, etc.). The first threshold is set in advance based on experiments, etc., so that it is a value equal to or greater than the magnitude of vibration that may occur during normal driving that is not dangerous driving. In this way, in the attached state of the mobile terminal 2, the control unit 19 sets the judgment threshold to the first threshold on the assumption that the vehicle is traveling. As a result, the control unit 19 suitably suppresses unnecessary writing of images generated by the camera 6 when dangerous driving is not occurring to the non-volatile memory 18.

In addition, when the mobile terminal 2 is attached, the control unit 19 preferably sets various settings of the camera 6 to settings suitable for capturing the scenery outside the vehicle. For example, the control unit 19 sets the imaging sensitivity, F-number, and/or focal length of the camera 6 to values suitable for capturing the scenery outside the vehicle. In this way, when dangerous driving occurs, the control unit 19 can store in the non-volatile memory 18 an image that clearly captures the situation at the time of the dangerous driving. Note that the first threshold value and the setting information of the camera 6 used in the attached state of the mobile terminal 2 are stored in advance in, for example, the non-volatile memory 18. In the attached state of the mobile terminal 2 shown in FIG. 5(A), the mode of the abnormality detection process using the first threshold value is an example of the "second mode" in the present invention.

Figure 5 (B) is a schematic diagram of the interior of the vehicle cabin when the mobile terminal 2 is not attached. In the example of Figure 5 (B), the driver removes the mobile terminal 2 from the imaging device 1 and exits the vehicle. In this case, the control unit 19 detects that the mobile terminal 2 has been removed based on the attachment/detachment detection signal S2, and causes the actuator 14 to rotate the housing unit 5 by approximately 180 degrees from the state shown in Figure 5 (A), thereby pointing the camera 6 toward the interior of the vehicle cabin.

When the mobile terminal 2 is not attached as shown in FIG. 5(B), the imaging device 1 functions as a security camera. Specifically, when the magnitude of vibration indicated by the vibration detection signal S1 supplied from the vibration sensor 12 exceeds the judgment threshold, the control unit 19 determines that an abnormality has occurred, and writes images stored in the RAM 17 for a predetermined time period before the abnormality was detected to the non-volatile memory 18. In this case, the control unit 19 also generates abnormality notification information for notifying the abnormality, and transmits the abnormality notification information generated by the network communication unit 16 to the mobile terminal 2. At this time, the control unit 19 may transmit some or all of the images written to the non-volatile memory 18 to the mobile terminal 2 by including them in the abnormality notification information.

Here, in the unworn state of the mobile terminal 2 shown in FIG. 5B, the control unit 19 sets the judgment threshold to a predetermined threshold (also called the "second threshold") that is smaller than the first threshold. The second threshold is set in advance based on experiments, for example, to a value that is larger than the magnitude of minute vibrations that may occur when the vehicle is stopped and is smaller than the magnitude of vibrations caused by contact with the vehicle by a person or object. In this way, in the unworn state of the mobile terminal 2, the control unit 19 sets the judgment threshold to the second threshold on the assumption that the vehicle is stopped. This allows the control unit 19 to appropriately detect an abnormality based on the vibrations that occur when a suspicious person such as a car thief contacts the vehicle, and to write an image to the non-volatile memory 18 or notify the user of the mobile terminal 2 of the abnormality by abnormality notification information.

In addition, when the portable terminal 2 is not attached, the control unit 19 preferably sets various settings of the camera 6 to settings suitable for capturing images of the interior of the vehicle. For example, the control unit 19 sets the imaging sensitivity, F-number, and/or focal length of the camera 6 to values suitable for capturing images of the interior of the vehicle. This allows the control unit 19 to preferably generate an image that clearly captures the state of the interior of the vehicle when an abnormality is detected. Note that the second threshold value and the setting information of the camera 6 used when the portable terminal 2 is not attached are stored in advance, for example, in the non-volatile memory 18. The mode of abnormality detection processing using the second threshold value and the like when the portable terminal 2 is not attached as shown in FIG. 5(B) is an example of the "first mode" in the present invention.

Figure 6 is an example of a flowchart executed by the control unit 19. The control unit 19 repeatedly executes the flowchart in Figure 6.

First, the control unit 19 determines whether the portable terminal 2 has been attached or detached (step S101). For example, the control unit 19 determines whether the portable terminal 2 has been attached or detached based on the attachment/detachment detection signal S2 transmitted from the vibration sensor 12.

When the control unit 19 determines that the portable terminal 2 has been attached or detached (step S101; Yes), the control unit 19 rotates the housing unit 5 by the actuator 14 (step S102). Specifically, when the portable terminal 2 has been detached from the imaging device 1, the control unit 19 rotates the housing unit 5 relative to the mounting unit 3 and the arm 4 so that the camera 6 is directed toward the interior of the vehicle, as shown in FIG. 3(B). On the other hand, when the portable terminal 2 has been attached to the imaging device 1, the control unit 19 rotates the housing unit 5 relative to the mounting unit 3 and the arm 4 so that the camera 6 is directed toward the outside of the vehicle (i.e., the front window), as shown in FIG. 4(B).

Next, the control unit 19 determines whether the portable terminal 2 is attached (step S103). If the portable terminal 2 is attached (step S103; Yes), the control unit 19 sets the determination threshold to a first threshold that is greater than the second threshold, and sets the various settings of the camera 6 to settings for capturing images outside the vehicle (step S104). This allows the control unit 19 to accurately detect only abnormalities due to dangerous driving, and when an abnormality is detected, it can appropriately generate an image that clearly captures the scenery outside the vehicle and store it in the non-volatile memory 18.

On the other hand, when the mobile terminal 2 is not attached (step S103; No), the control unit 19 sets the judgment threshold to a second threshold that is smaller than the first threshold, and changes the various settings of the camera 6 to settings for capturing images inside the vehicle (step S105). This enables the control unit 19 to accurately detect abnormalities in the vehicle when the vehicle is parked, and when an abnormality occurs, it can preferably generate an image that clearly captures the state of the interior of the vehicle.

Then, the control unit 19 performs an abnormality determination based on the determination threshold set in step S104 or step S105 and the vibration detection signal S1 output by the vibration sensor 12 (step S106). Then, when the magnitude of the vibration indicated by the vibration detection signal S1 exceeds the determination threshold, the control unit 19 writes the image in the RAM 17 to the non-volatile memory 18. Furthermore, when the mobile terminal 2 is not worn, the control unit 19 transmits abnormality notification information to the mobile terminal 2 via the network communication unit 16.

As described above, the imaging device 1 according to this embodiment includes an attachment unit 3 that can be attached to a vehicle, a camera (imaging unit) 6, a vibration sensor 12, and a control unit 19. The camera 6 is configured to be rotatable with respect to the attachment unit 3. The control unit 19 switches between a mode in which an abnormality is determined using a second threshold value when the portable terminal 2 is not attached, and a mode in which an abnormality is determined using a first threshold value higher than the second threshold value when the portable terminal 2 is attached, in response to the rotation of the camera 6 by the actuator 14. This allows the imaging device 1 to function as a holder for the portable terminal 2 and a drive recorder when the portable terminal 2 is attached, and to function favorably as a security camera in the vehicle cabin when the portable terminal 2 is not attached.

[Modification]
Preferred modifications of the above-described embodiment will be described below. The following modifications may be applied to the above-described embodiment in any combination.

(Variation 1)
The imaging device 1 may have a configuration in which the housing 5 is rotatable based on a manual operation, instead of the configuration in which the housing 5 is automatically rotated in response to the attachment or detachment of the portable terminal 2.

In this case, for example, the arm 4 and the housing 5 are connected by a ball link or the like, and the housing 5 is freely rotatable relative to the arm 4 at least along the installation surface. When the user of the portable terminal 2 attaches the portable terminal 2 to the imaging device 1, the user manually operates the housing 5 so that the display of the portable terminal 2 faces the interior of the vehicle as shown in FIG. 4(A), and when the user removes the portable terminal 2 from the imaging device 1, the user manually operates the housing 5 so that the camera 6 faces the interior of the vehicle as shown in FIG. 4(B). Even in this embodiment, the imaging device 1 preferably functions as a drive recorder when the vehicle is traveling, and functions as a security camera when the vehicle is parked.

The imaging device 1 may be configured such that the housing 5 automatically rotates so that the camera 6 faces the interior of the vehicle only when the portable terminal 2 is removed. In this case, when the portable terminal 2 is attached to the imaging device 1, the orientation of the housing 5 is rotated 180 degrees before or after the portable terminal 2 is attached.

In the first modification, the control unit 19 may determine whether to set the determination threshold to the first threshold or the second threshold based on the angle of the housing unit 5 in addition to whether the portable terminal 2 is attached to the imaging device 1. In this case, for example, the imaging device 1 is provided with an angle sensor for detecting the angle of the housing unit 5, and the control unit 19 determines the orientation of the camera 6 based on the output of the angle sensor. Then, when the control unit 19 determines that the portable terminal 2 is attached and the camera 6 is facing the outside of the vehicle, it executes step S104 in FIG. 6, and when the control unit 19 determines that the portable terminal 2 is not attached and the camera 6 is facing the inside of the vehicle, it executes step S105. As a result, even when the rotation angle of the housing unit 5 is adjusted by manual operation, the control unit 19 can appropriately determine whether the camera 6 is photographing the outside or inside of the vehicle and accurately set the determination threshold, etc.

(Variation 2)
1 and the like, the orientation of the camera 6 and the orientation of the display of the portable terminal 2 attached to the imaging device 1 differ by approximately 180 degrees when the portable terminal 2 is attached, but the configuration to which the present invention is applicable is not limited to this. For example, the installation angles of the camera 6 and the magnet part 8 may be set so that the camera 6 is oriented in a suitable direction for capturing an image of the area in front of the vehicle when the display of the portable terminal 2 attached to the imaging device 1 is directed toward the driver's seat.

(Variation 3)
1 etc., the housing unit 5 is configured to be rotatable relative to the arm 4, but instead, the arm 4 may be configured to be rotatable relative to the mounting unit 3. In this case, the arm 4 and the housing unit 5 rotate relative to the mounting unit 3 approximately parallel to the installation surface.

REFERENCE SIGNS LIST 1 Imaging device 2 Portable terminal 6 Camera 10 Display 11 GPS receiver 12 Vibration sensor 13 Mounting/removal detection sensor 15 Near-field communication unit 16 Network communication unit 17 RAM
18 Non-volatile memory 19 Control unit

Claims (10)

An imaging device that can be attached to a moving object,
A support section that detachably supports the display terminal;
An imaging unit capable of rotating an imaging direction;
An acceleration sensor;
When the support unit supports the display terminal, a second mode is executed in which recording of an image captured by the imaging unit is started when an output signal of the acceleration sensor indicates a first threshold value or more;
a control unit that executes a first mode in which, when the display terminal is detached from the support unit, recording of an image captured by the imaging unit is started when an output signal of the acceleration sensor indicates a second threshold value or higher that is lower than the first threshold value; and
An imaging device comprising: The imaging device according to claim 1, wherein the control unit executes the second mode when the support unit supports the display terminal and the imaging direction of the imaging unit is directed toward the outside of the moving body, and executes the first mode when the display terminal is removed from the support unit and the imaging direction of the imaging unit is directed toward the inside of the moving body. A housing that houses the imaging unit,
The imaging device according to claim 1 , wherein the housing includes a first end portion that houses the imaging unit, and a second end portion that is different from the first end portion, and the support portion that detachably supports the display terminal. 4. The imaging device according to claim 1, further comprising a first transmission unit that transmits an image captured by the imaging unit to the display terminal in the second mode. The imaging device according to any one of claims 1 to 4, further comprising a second transmission unit that transmits information indicating an abnormality to the display terminal when the output signal of the acceleration sensor indicates the second threshold or higher in the first mode. 6. The imaging device according to claim 1, wherein the control unit changes at least one of an imaging sensitivity, an F-number, and a focal length of the imaging unit in response to rotation of the imaging unit. 7. The imaging device according to claim 1, further comprising a rotation control unit that rotates the imaging unit in response to attachment or detachment of the display terminal. A control method executed by an imaging device that is mountable to a moving object and that includes a support unit that detachably supports a display terminal, an imaging unit that is rotatable in an imaging direction, and an acceleration sensor, the control method comprising:
When the support unit supports the display terminal, a second mode is executed in which recording of an image captured by the imaging unit is started when an output signal of the acceleration sensor indicates a first threshold value or more;
A control method having a control step of executing a first mode in which, when the display terminal is removed from the support part, recording of an image captured by the imaging part is started when the output signal of the acceleration sensor indicates a second threshold value or higher that is lower than the first threshold value. A program executed by a computer of an imaging device that is mountable to a moving body and includes a support unit that detachably supports a display terminal, an imaging unit that can rotate an imaging direction, and an acceleration sensor, the program comprising:
When the support unit supports the display terminal, a second mode is executed in which recording of an image captured by the imaging unit is started when an output signal of the acceleration sensor indicates a first threshold value or more;
A program that causes the computer to function as a control unit, which, when the display terminal is removed from the support unit, executes a first mode in which recording of an image captured by the imaging unit begins when the output signal of the acceleration sensor indicates a second threshold value or higher that is lower than the first threshold value. A storage medium storing the program according to claim 9.