JP5773909B2 - Vehicle safety confirmation device - Google Patents

Description

  The present invention relates to a vehicle safety confirmation device capable of performing safety confirmation when a vehicle starts.

In the vehicle, when operating the shift lever is placed in reverse gear is performed, by displaying the image behind the vehicle, the implementation of safety check of the vehicle rear vehicle safety check equipment capable known . However, in a configuration in which an image of the rear of the vehicle is displayed before the operation of the shift lever, when the user visually recognizes a child or the like in the image, as a result of performing reverse driving more carefully than usual, safety is further improved. be able to.

  Therefore, a technology that predicts in advance whether the vehicle will move forward or backward before an operation is performed on the shift lever, and displays the image captured by the rear camera on a display or the like if it is predicted to move backward Has been proposed. For example, Patent Document 1 discloses a technique for displaying an image behind the vehicle when the position of the vehicle, the direction of the vehicle, the operation of the vehicle, and the operation of the vehicle satisfy predetermined conditions. Further, for example, Patent Document 2 discloses a technique for predicting that a vehicle will travel immediately after parking in a direction opposite to the direction traveled immediately before parking.

JP 2003-312406 A JP 2010-195168 A

  However, in the technique disclosed in Patent Document 1, in order to predict that there is no road ahead of the vehicle, the position and orientation of the host vehicle must be analyzed and detected with reference to map data. There is a problem in that it is necessary to mount data due to the necessity of mounting data, and the analysis processing and detection processing of the vehicle position and orientation become complicated. Moreover, since only the information detected in real time is used, there is a problem that the user's habits and habits are not reflected in the prediction. For this reason, there is a problem that the possibility that the vehicle will move backward cannot be properly predicted. As a result, there has been a problem that an image behind the vehicle cannot be displayed properly.

  Further, in a turntable parking lot, it is common to start forward both when parking and starting, so the prediction disclosed in Patent Document 2 is inaccurate, and as a result, the rear of the vehicle There was a problem that the display of the video of could not be displayed properly.

  Therefore, the present invention has been made in view of the above-described problems, and an object thereof is to provide a technique capable of appropriately displaying an image behind the vehicle with a simple device configuration.

  A vehicle safety confirmation device according to the present invention is a vehicle safety confirmation device capable of performing safety confirmation when a vehicle starts, and includes a display unit, an imaging unit that captures an image of a vehicle rear, and a vehicle. An operation detection unit that detects a start preparation operation performed on the vehicle during the period from when the vehicle is parked until the vehicle starts, and a position detection unit that detects the position of the vehicle. The vehicle safety confirmation device stores start history data in which the past parking position of the vehicle, the number of times the vehicle has moved forward in the past from the parking position, and the start information relating to the number of times the vehicle has moved backward in the past are associated with each other. When the start preparation operation is detected by the storage unit and the operation detection unit, the number of forward movements and the number of reverse movements are acquired from the start history data regarding the parking position corresponding to the position detected by the position detection unit, and the number of reverse movements Is further provided with a control unit that displays the video imaged by the imaging unit on the display unit when the value is larger than the number of forward movements.

According to the present invention, regarding the past parking position corresponding to the position detected by the position detecting unit, the number of forwards and the number of backwards are obtained from the start history data, and the imaging unit is obtained when the number of backwards is greater than the number of forwards The video imaged in is displayed on the display unit. Therefore, since the user's habits and habits are reflected in the switching of the image behind the vehicle on the display unit, the image behind the vehicle can be appropriately displayed. In addition, the device configuration can be simplified.

1 is a block diagram showing a configuration of a vehicle safety confirmation device according to Embodiment 1. FIG. It is a figure for demonstrating the vehicle safety confirmation apparatus which concerns on Embodiment 1. FIG. 3 is a flowchart showing the operation of the vehicle safety confirmation device according to the first embodiment. 3 is a flowchart showing the operation of the vehicle safety confirmation device according to the first embodiment.

<Embodiment 1>
The vehicle safety confirmation device according to Embodiment 1 of the present invention is a device capable of performing safety confirmation when a vehicle (not shown) starts. FIG. 1 is a block diagram showing a configuration of a vehicle safety confirmation device according to the present embodiment. As shown in FIG. 1, the vehicle safety confirmation device includes a start preparation operation detection unit 1, which is an operation detection unit, a position detection unit 2, a start direction detection unit 3, and a start history data storage which is a storage unit. A unit 4, a camera 5 that is an imaging unit, a navigation device 6, a display 7 that is a display unit, and a control unit 8 such as a CPU (Central Processing Unit) that comprehensively controls them.

  The start preparation operation detection unit 1 includes an ACC (accessory) state sensor 1a, an ignition state sensor 1b, and a door open / close state sensor 1c. The position detection unit 2 includes a GPS (Global Positioning System) receiving device 2a and a host vehicle position detection unit 2b. The start direction detector 3 includes a vehicle speed sensor 3a and a reverse sensor 3b. The control unit 8 includes a start history saving processing unit 8a, a switching determination processing unit 8b, and a video switching processing unit 8c as functional blocks. Next, each of the above components will be described in detail.

  The start preparation operation detection unit 1 detects a start preparation operation that is performed on the vehicle from when the vehicle is parked to when the vehicle starts (for example, when an operation is performed on the shift lever). In the present embodiment, the ACC state sensor 1a detects whether or not the ACC state of the vehicle is ON, and detects that the start preparation operation has been performed when ON is detected. Further, the ignition state sensor 1b detects whether or not the ignition state of the vehicle is ON, and detects that the start preparation operation has been performed when ON is detected. The door open / close state sensor 1c detects whether or not the vehicle door is open, and detects that the start preparation operation has been performed when the door open is detected.

  The position detection unit 2 detects the position of the vehicle. In the present embodiment, the GPS receiver 2a receives a radio signal from a GPS satellite. And the own vehicle position detection part 2b detects the position of the vehicle on an absolute coordinate (latitude and longitude) based on the radio signal received by the GPS receiver 2a.

  The start direction detector 3 detects the start direction of the vehicle. In the present embodiment, the vehicle speed sensor 3a detects the traveling speed (vehicle speed) of the vehicle. The reverse sensor 3b detects the reverse operation of the vehicle based on, for example, whether or not the shift lever is positioned in the back gear. Here, when the vehicle speed sensor 3a detects a vehicle speed that is equal to or greater than a predetermined threshold (for example, the value of the speed during normal driving) and the reverse sensor 3b detects a reverse operation of the vehicle, the start direction is detected. The unit 3 detects reverse start (reverse) as the start direction of the vehicle. On the other hand, when the vehicle speed sensor 3a detects a vehicle speed equal to or higher than a predetermined threshold value and the reverse sensor 3b does not detect the reverse operation of the vehicle, the start direction detection unit 3 starts the forward start (forward) ) Is detected.

  The start history data storage unit 4 stores various types of information. Here, it is assumed that the start history data storage unit 4 is configured by a non-volatile memory such as an HDD (Hard Disk Drive) capable of holding information even when power is not supplied.

  The start history saving processing unit 8a (control unit 8) stores the start history data as the past parking position by using the position detected by the position detection unit 2 when the start preparation operation detecting unit 1 detects the start preparation operation. Store in part 4. At the same time, the start history saving processing unit 8a (control unit 8) stores the start direction detected by the start direction detecting unit 3 in the start history data storage unit 4 as start information described below.

  FIG. 2 is a diagram illustrating an example of the data structure of the start history data stored in the start history data storage unit 4. As shown in FIG. 2, the start information is information related to the number of times the vehicle has moved forward in the past from the parking position and the number of times the vehicle has moved backward in the past.

  The start history saving processing unit 8a accumulates start history data line by line in the start history data storage unit 4 every time the vehicle starts from parking. By such processing of the start history saving processing unit 8a, the start history data in which the parking position and the start information are associated with each other is saved (stored) in the start history data storage unit 4 so that the start history data can be held without being supplied with power. ) Note that there are a plurality of start information for frequently parked parking positions, such as when the coordinates of latitude and longitude are (xxx1, yyy1) and (xxx4, yyy4) shown in the example of FIG. Remembered.

  Returning to FIG. 1, the camera 5 is a rear camera and captures an image of the rear of the vehicle.

  The navigation device 6 is, for example, a car navigation device or a PND (Portable Navigation Device), and has a function of searching for a destination and a waypoint based on a keyword or the like, and a route from a current position to a route point based on a map data or the like. A function for searching for an appropriate route to the destination and a function for performing guidance based on the route.

  When the start preparation operation detection unit 1 detects the start preparation operation, the switching determination processing unit 8b (control unit 8) performs the number of forwards and the number of reverses with respect to the parking position corresponding to the position detected by the position detection unit 2. Is retrieved (acquired) from the start history data (FIG. 2).

When the number of backward movements is larger than the number of forward movements, the switching determination processing unit 8b outputs a switching signal for displaying the video captured by the camera 5 on the display 7 to the video switching processing unit 8c. On the other hand, when the number of backward movements is smaller than the number of forward movements, the switching determination processing unit 8b outputs a switching signal for displaying a video other than the video captured by the camera 5 on the display 7 to the video switching processing unit 8c. To do. As the other video, any video may be used as long as the video is output to the video switching processing unit 8c. However, in the present embodiment, the video output from the navigation device 6 (for example, the destination) And video showing a route, TV video, and video video). Detailed processing of the switching determination processing unit 8b will be described later using a flowchart.

  The video switching processing unit 8c (control unit 8) displays the video captured by the camera 5 or another video on the display 7 based on the switching signal from the switching determination processing unit 8b.

  3 and 4 are flowcharts showing the processing of the vehicle safety confirmation apparatus configured as described above. FIG. 3 shows a start history saving process for storing start history data so as to be saveable, and FIG. 4 shows a switching determination process for determining whether to switch the display of the display 7. Hereinafter, processing of the vehicle safety confirmation device according to the present embodiment will be described with reference to FIGS. 3 and 4. Note that both the start history saving process and the switching determination process are started at the timing when the door lock of the vehicle is unlocked by an operation with a remote control key or the like before the user gets on.

  First, the start history saving process will be described with reference to FIG. In step S1, the start history saving processing unit 8a determines whether or not the ACC state sensor 1a has detected the ON state of the ACC state. If it is determined that ON has been detected, the process proceeds to step S2. If it is determined that ON has not been detected, step S1 is repeated until it is determined that it has been detected.

  In step S2, the position detection unit 2 detects the current position (latitude and longitude) of the vehicle, and the start history saving processing unit 8a acquires the current position detected by the position detection unit 2.

  In step S3, the start history saving processing unit 8a determines whether or not the ignition state sensor 1b detects that the ignition state is ON. If it is determined that ON is detected, the process proceeds to step S4. If it is determined that ON is not detected, step S3 is repeated until it is determined that the ON is detected thereafter.

  In step S4, the start direction detector 3 determines whether or not the vehicle speed detected by the vehicle speed sensor 3a is equal to or greater than a predetermined threshold value. If it is determined that the vehicle speed is equal to or higher than the predetermined threshold value, the process proceeds to step S5. If it is determined that the vehicle speed is lower than the predetermined threshold value, step S4 is repeated until it is determined that the vehicle speed is detected thereafter.

  In step S5, when the reverse sensor 3b detects the reverse operation of the vehicle, the start direction detection unit 3 detects the reverse as the start direction of the vehicle, and the reverse sensor 3b does not detect the reverse operation of the vehicle. In this case, the forward movement is detected as the starting direction of the vehicle. Then, the start history saving processing unit 8a acquires the start direction detected by the start direction detecting unit 3.

  In step S6, the start history saving processing unit 8a stores the current position acquired in step S2 and the start direction acquired in step S5 in the start history data storage unit 4. As a result, the start history data in units of one line is stored in the start history data storage unit 4. Thereafter, a series of processes shown in FIG.

  Next, the switching determination process will be described with reference to FIG. In step S11, the switching determination processing unit 8b determines whether the door opening / closing state sensor 1c detects the opening of the vehicle door. If it is determined that an opening has been detected, the process proceeds to step S12. If it is determined that an opening has not been detected, step S11 is repeated until it is subsequently detected.

  In step S12, the position detection unit 2 detects the current position (latitude and longitude) of the vehicle, and the switching determination processing unit 8b acquires the current position detected by the position detection unit 2.

  In step S13, the switching determination processing unit 8b searches for the past parking position that matches the current position detected in step S12 from the start history data shown in FIG. And the switching determination process part 8b acquires all the start information regarding the said past parking position, and acquires the frequency | count of advancing and reverse | retreating by taking the sum of the number about each of advance and reverse. As described above, the switching determination processing unit 8b according to the present embodiment calculates the number of forward movements of the vehicle and the number of backward movements of the past from the parking position corresponding to the current position detected by the position detection unit 2. Obtained from the start history data.

  In step S14, the switching determination processing unit 8b compares the number of forwards and the number of backwards acquired in step S13.

  In step S15, if the number of backward movements is greater than the number of forward movements, the process proceeds to step S16, and if the number of backward movements is less than the number of forward movements, the process proceeds to step S17.

  In step S16, the switching determination processing unit 8b outputs a switching signal for displaying the captured video of the camera 5 on the display 7 to the video switching processing unit 8c. The captured image of the camera 5 is displayed on the display 7 by the switching control of the video switching processing unit 8c. Thereafter, a series of processes shown in FIG.

  On the other hand, in step S17, the switching determination processing unit 8b outputs a switching signal for displaying the output video of the navigation device 6 on the display 7 to the video switching processing unit 8c. The output video of the navigation device 6 is displayed on the display 7 by the switching control of the video switching processing unit 8c. Thereafter, a series of processes shown in FIG.

According to the vehicle safety confirmation device according to the present embodiment as described above, the number of forward movements and the number of backward movements are acquired from the start history data regarding the past parking position corresponding to the position detected by the position detection unit 2, When the number of backward movements is larger than the number of forward movements, an image captured by the camera 5 is displayed on the display 7. Here, as a general trend, the number of advancements and retreats in parking lots at home garages and frequently visited facilities such as work places are closely related to the user's habits and customs and individual parking lots. doing. Therefore, according to the present embodiment, since the user's habits and habits are reflected in the switching of the video behind the vehicle on the display 7, the video behind the vehicle can be appropriately displayed. Further, since the yaw rate sensor for detecting the direction of the vehicle and the analysis of the map data are not essential, the device configuration of the vehicle safety confirmation device that switches the video display based on the prediction result of the starting direction can be simplified. .

  In the present embodiment, when a start preparation operation is detected, the position detected by the position detector 2 and the start direction detected by the start direction detector 3 are set as start history data. It is stored in the storage unit 4. Therefore, since the display on the display 7 can be switched based on the starting direction (starting information) after parking, the video behind the vehicle can be appropriately displayed even in a turntable parking lot.

<Modification 1>
In the above description, the switching determination processing unit 8b selects the video to be displayed on the display 7 based on the comparison result between the number of forwards and the number of backwards acquired in step S13. But not limited to this, the switching determination processing unit 8b is a predetermined percentage of the total outgoing advance the number of backward number acquired from the starting history data in step S13 is the first threshold value (e.g. 0.8, i.e. 80%) or more In this case, an image behind the vehicle may be displayed on the display 7.

According to this modified example 1, habits and customs of the users, Oite to switch the vehicle rear image on the display 7, since the greater is reflected, is possible to more appropriately display an image behind the vehicle it can.

<Modification 2>
The storage capacity of the storage device used for the start history data storage unit 4 is usually finite. Therefore, when the start history saving processing unit 8a stores the start history data storage unit 4 in the start history data storage unit 4, the number of start directions (start information) stored in the start history data storage unit 4 is equal to or more than the second threshold value. The oldest start direction stored in the start history data storage unit 4 may be discarded and the new start direction stored in the start history data storage unit 4.

  According to the second modified example, since the latest habits and customs are applied to the user's habits and customs reflected in the switching of the video behind the vehicle on the display 7, the video behind the vehicle is appropriately displayed. Can be displayed.

  However, in such a configuration, if the vehicle is frequently parked only in a small number of parking positions in a short period, it is considered that no start history data remains for other parking positions. Therefore, the start history saving processing unit 8a (control unit 8) may perform the above discarding and storing for each past parking position. When configured in this way, even if the vehicle is frequently parked in only a small number of parking positions in a short period of time, start history data can be left for other parking positions.

  Further, when there is a strong demand to increase the number of parking positions stored in the start history data, when the start direction is stored in the start history data storage unit 4, the number of forwards and the number of reverses are cumulatively added as numbers. Then, those numbers and the position detected by the position detection unit 2 may be stored as start history data.

<Other variations>
In the above description, the position detection unit 2 and the display 7 included in the vehicle safety confirmation device are provided separately from the navigation device 6. However, the present invention is not limited to this, and some or all of the components of the vehicle safety confirmation device may be provided in the navigation device 6.

  In the start history saving process shown in FIG. 3, the start preparation operation is detected by detecting the ON state of the ACC state in step S1 and detecting the ON state of the ignition state in step S3. However, the present invention is not limited to this, and it may be detection of opening of the door, detection of unlocking of the door lock, or detection of the weight of the driver in the driver's seat. A combination of these may also be used. The same applies to the detection of the start preparation operation in the switching determination process shown in FIG. That is, the above-described start preparation operation may include at least one of ACC (accessory) power ON, ignition ON, door opening, and seating in the driver's seat.

  In the above description, the number of forwards and the number of backwards are compared in step S14 in the switching determination process shown in FIG. However, the present invention is not limited to this, and after step S6 of the start history saving process shown in FIG. 3, the number of forwards and reverses similar to step S14 may be compared.

  Further, after the start history saving process shown in FIG. 3 is performed once, the start history saving process and the switching determination process shown in FIG. 4 may be performed in parallel.

  In the present invention, the embodiments can be appropriately modified and omitted within the scope of the invention.

  1 start preparation operation detection unit, 2 position detection unit, 3 start direction detection unit, 4 start history data storage unit, 5 camera, 7 display, 8 control unit.

Claims (5)

A vehicle safety confirmation device capable of performing safety confirmation when a vehicle starts,
A display unit;
An imaging unit that captures an image of the rear of the vehicle;
An operation detection unit that detects a start preparation operation performed on the vehicle during a period from when the vehicle is parked to start;
A position detector for detecting the position of the vehicle;
A storage unit that stores start history data in which a past parking position of the vehicle, start information on the number of times the vehicle has started moving forward from the parking position, and start information on the number of times the vehicle has moved backward in the past are associated with each other; ,
When the start preparation operation is detected by the operation detection unit, the number of forward movements and the number of reverse movements are acquired from the start history data regarding the parking position corresponding to the position detected by the position detection unit, A vehicle safety confirmation device comprising: a control unit that displays an image captured by the imaging unit on the display unit when the number of times of reversing is greater than the number of times of forward movement. The vehicle safety confirmation device according to claim 1,
The controller is
Wherein when the ratio to the total outgoing advance the number of the backward count obtained from the starting history data is smaller than the first threshold value, displaying the image on the display unit, the safety confirmation system for a vehicle. The vehicle safety confirmation device according to claim 1 or 2,
Further comprising a start direction detecting unit for detecting a start direction of the vehicle;
The controller is
When the start preparation operation is detected by the operation detection unit, the position detected by the position detection unit is stored in the storage unit as the parking position, and the start direction detected by the start direction detection unit Is stored in the storage unit as the start information. The vehicle safety confirmation device according to claim 3,
The controller is
When storing the start direction in the storage unit, if the number of start directions stored in the storage unit is equal to or greater than a second threshold, the oldest one start stored in the storage unit A vehicle safety confirmation device that discards a direction and stores a new start direction in the storage unit. A vehicle safety confirmation device according to any one of claims 1 to 4,
The vehicle start-up preparation operation includes at least one of accessory power-on, ignition-on, door opening, and seating in a driver's seat.

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