JP2001043494A - Camera device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To recognize safety in left and right with composure through the use of a camera image to help the recognition by means of the naked eyes in addition to the left and right safety recognition by means of the naked eyes by detecting a decelerating degree without uselessly projecting the camera image to predict a stop period and normally executing change-over into the camera image in a prescribed timing before stopping. SOLUTION: A camera device for a vehicle having a camera part in the front part of the vehicle, which is for projecting the front side part of the vehicle on a display arranged inside the vehicle, is provided with an operation control part for automatically executing an ON-operation in accordance with a vehicle travelling situation and for projecting the front side part of the vehicle on the display at a prescribed time. The operation control part is constituted to be ON-operated not when the vehicle simply stops or its speed simply becomes lower than the prescribed one but before the vehicle stops or its speed becomes lower than the prescribed one by detecting an accelerating degree when the vehicle is decelerated and using the deceleration accelerating degree as a control element.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicular camera apparatus provided with a camera unit for projecting a front side of a vehicle, which is often a blind spot of a driver at an intersection, on a display provided in the vehicle. It is about.

[0002]

2. Description of the Related Art When there is an obstacle such as a building or a parked vehicle on the left or right at an intersection or when leaving a vehicle, the obstacle obstructs the driver's left and right view.
Because it is difficult to check the safety of the left and right, you have to move forward as much as possible while moving forward slowly, check the left and right, and start.

[0003] Particularly, at an intersection with a pause display, a traveling priority vehicle is traveling in front of the vehicle from the left and right. Therefore, it is very important to check the left and right. A road reflector is installed in front of the vehicle to check the left and right.

[0004] However, since this road reflector is far away, it is difficult to see it, and it is not installed at all intersections.

On the other hand, recently, with the spread of car navigation having a display, vehicles equipped with a display capable of displaying an image in the vehicle have been increasing.

Therefore, in order to assist the driver in checking the left and right eyes with the naked eye and to facilitate driving, a camera unit such as a CCD camera is attached to the front of the vehicle facing the front of the vehicle. The signal is projected on the display inside the vehicle, and the driver can check the left and right with the naked eye as usual and the left and right images of the front part of the vehicle projected on this display, making it easy to check the left and right easily and securely A vehicular camera device has been developed.

[0007]

However, the conventional vehicular camera apparatus uses a display used as a multifunctional monitor such as a car navigation, a car television, a warning display, an audio display, and an operation display of an air conditioner. Since it is not possible to constantly display the camera image in a meaningless manner, the display is switched and displayed by a manual operation when necessary, such as when stopping at an intersection or when leaving a vehicle, similarly to other functions. In addition, in order to perform automatic operation (automatic ON) at an intersection instead of manual operation, a vehicle stop detection device and a speed detection device that automatically operates when a predetermined low speed or less during driving are provided and the operation is controlled. Although it is conceivable to perform the operation by simply detecting only the stop and speed in this way, the automatic ON will not be performed unless it is completely stopped, and
Even if it is turned on automatically at low speeds, the low speed at which it should be turned on should not be meaninglessly used during normal driving or sloppy driving during congestion, or should not interfere with navigation images. Considering
Must be set at a fairly low speed. Therefore, especially at the time of sudden deceleration, the ON operation is not performed until the stop or immediately before the stop, and the ON operation cannot be performed early before the stop.

That is, in order for the driver to check the right and left visually with his own naked eye and also to check the right and left with the camera image to assist the smoothness, the driver must approach the intersection in the automatic control. When the display is turned on early to view the display, it is desirable that an image of the front side, which is already a blind spot, is already displayed on the display. However, as shown in FIG. 4, if the control is performed such that the ON operation is performed simply when the speed becomes equal to or lower than the low speed V _O , for example, when the vehicle is suddenly decelerated, the time interval until the stop is short, so that the image is projected earlier. Can not.

In other words, the deceleration causes a difference in the switching timing to the camera image immediately before the intersection.

The present invention finds such a problem in a conventional vehicle camera device and solves the problem. The present invention detects a situation in which left and right confirmation is required before stopping, and quickly detects the situation.
The camera image is displayed on the display by operating N, and in addition to the left and right confirmation by the naked eye that the driver actually sees with his own naked eyes, the left and right confirmation by the camera image that assists the driver can be done with a margin and speedy and smooth It is an object of the present invention to provide an epoch-making vehicle camera device that is extremely practical and can be easily performed.

For example, specifically, the stop time is predicted in advance by detecting the deceleration without unnecessary projection of the camera image, and based on the prediction, the camera image is always displayed at a predetermined timing before the stop. By switching,
It is an object of the present invention to provide a revolutionary vehicle camera device which has sufficient room for left and right confirmation and which can perform the left and right confirmation quickly and smoothly, and which is extremely practical.

[0012]

The gist of the present invention will be described with reference to the accompanying drawings.

[0013] In a vehicular camera apparatus provided with a camera section for projecting a front side of a vehicle, which often becomes a blind spot of a driver at an intersection, on a display provided in the vehicle, in accordance with a vehicle driving situation. An operation control unit that automatically turns on the operation and projects the front side of the vehicle on the display at a predetermined time is provided, instead of simply turning on when the vehicle is stopped or when the speed becomes lower than a predetermined low speed,
The vehicle according to claim 1, wherein the operation control unit is configured to detect an acceleration at the time of deceleration of the vehicle, use the deceleration as a control element, and perform an ON operation before stopping or before the speed becomes equal to or lower than the predetermined low speed. It relates to a camera device.

Further, at the time of rapid deceleration in which the absolute value of the deceleration of the vehicle is equal to or greater than a predetermined value, the vehicle is turned on even before the vehicle stops or before the vehicle reaches a predetermined low speed, so that the vehicle is rapidly decelerated. 2. The vehicle camera device according to claim 1, wherein the operation control unit is configured to be turned on at an early stage.

When the absolute value of the deceleration of the vehicle is equal to or greater than a predetermined value and a brake operation signal is detected, it is determined that the brake is decelerating for stopping and the vehicle is turned on to stop. The vehicle camera device according to any one of claims 1 and 2, wherein the operation control unit is configured so as to be turned ON earlier earlier.

When the absolute value of the deceleration of the vehicle is equal to or more than a predetermined value and a direction indicator operation signal is detected, it is determined that the vehicle is decelerating for stopping and the vehicle is turned on. The said operation control part was comprised so that ON operation might be performed early before stopping.
3. The vehicle camera device according to claim 3, wherein

Further, when a signal indicating that the absolute value of the deceleration of the vehicle is equal to or more than a predetermined value and the distance from the intersection is equal to or less than the predetermined distance is detected by using the navigation system, the image is switched from the navigation image. 5. The operation control unit according to claim 1, wherein the operation control unit is configured to be turned on early before stopping at the intersection.
The present invention relates to the vehicle camera device according to any one of the above.

Further, the acceleration at the time of deceleration of the vehicle is detected,
The stop time of the vehicle is predicted based on the deceleration and the time until the vehicle is decelerated to a predetermined speed.
An operation time for N operation is determined, and the operation control unit is provided with a stop prediction means so that the operation control unit is turned on earlier when the vehicle decelerates sharply and later when the vehicle decelerates slowly. Item 6. The vehicle camera device according to any one of Items 1 to 5.

Further, after the ON operation, the operation control section is configured to prevent the ON operation when the speed of the vehicle becomes equal to or higher than a predetermined speed or becomes a predetermined acceleration and the speed increases. The present invention relates to a camera device for a vehicle according to any one of claims 1 to 6.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention (how to implement the invention) will be briefly described with reference to the drawings, showing the operational effects thereof.

Although the speed detecting means for judging whether or not the speed of the vehicle is equal to or lower than a predetermined low speed may be used together, the present invention simply switches the image on the display to the camera image by simply using the speed as a control element. Rather than detecting the deceleration (deceleration) of the vehicle, and using this deceleration as a control element. For example, when the vehicle is suddenly decelerated with a large deceleration (negative acceleration absolute value is large), it is turned on earlier. When the motor is decelerated and the deceleration is small (the negative absolute value of the absolute value is small), the motor is turned on later than the slow deceleration. In preparation for stopping, the motor is always turned on at a predetermined timing before stopping.

Therefore, before the vehicle stops, it is possible to detect a situation where it is necessary to check the left and right sides, and to turn on the device early so that the camera image can be projected on the display, so that the driver can actually see with his own eyes. In addition to the left and right confirmation by the naked eye, the left and right confirmation by a camera image for assisting the left and right confirmation can be performed with a margin and speedy and smooth.

[0023] Specifically, for example, the decelerating acceleration alpha, and this from the detection time of the velocity V _H by the time T until the deceleration in a predetermined speed V _L predicts a stop timing of the vehicle (rapid deceleration or slow Judge whether it is deceleration) and turn on in accordance with this prediction
The operation control unit is provided with a stop prediction unit that determines the operation time to be activated and that is turned on early when the vehicle is suddenly decelerated and is turned on later when the vehicle is decelerated slowly, so that the display is switched to the camera image by the deceleration. There is little difference in timing, and the camera image is always switched to the camera image approximately a fixed time before the stop or at a certain intersection distance.When the driver approaches the intersection and tries to see it, it is switched to the camera image and unnecessary In such a case, a navigation image is displayed instead of a camera image. Therefore, before the vehicle stops, it detects the situation where left and right confirmation is required, turns it on early and projects the camera image on the display, and the left and right confirmation with room and the left and right confirmation can be done quickly and smoothly. It will be.

Further, the operation control unit is provided with means for detecting that the vehicle is approaching the intersection by using a brake operation, a turn signal operation, or a navigation system. A camera image is not displayed at an appropriate time, and the vehicle camera device is more practical.

[0025]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described with reference to the drawings.

The operation control section of this embodiment is turned on as follows.
It is configured to operate (switch to camera image).

The acceleration at the time of deceleration of the vehicle is detected, and this deceleration is used as a control element. At the time of rapid deceleration in which the deceleration (negative absolute value of the acceleration value) of the vehicle is equal to or more than a predetermined value, the vehicle is stopped before or after stopping. The vehicle is configured to be turned on even before the vehicle reaches a predetermined low speed, and to be turned on early in the case of sudden deceleration.

[0028] More specifically, the speed reduction acceleration alpha, and this from the detection time of the velocity V _H by the time T until the deceleration in a predetermined speed V _L predicts a stop timing of the vehicle (rapid deceleration or slow Judgment as to whether the vehicle is decelerating), and determine the operation time for ON operation in accordance with this prediction.
At the time of slow deceleration, stop prediction means is provided later.

Further, in this embodiment, only when a brake actuation signal is detected, a brake detecting means is provided which can judge that the brake is decelerating for stopping and operate ON.

In this embodiment, an intersection detecting means which can be turned ON is provided so as to switch from the navigation image only when a signal indicating that the distance from the intersection is equal to or less than a predetermined distance is detected using the navigation system. I have.

In addition, when the deceleration of the vehicle is equal to or more than a predetermined value and a direction indicator operation signal is detected, it is determined that the vehicle is decelerating for stopping and the direction indicator detecting means is turned on. May be provided.

If the speed of the vehicle becomes higher than or equal to a predetermined speed or increases after the ON operation, the ON operation is blocked to stop the camera image and switch to the original navigation image. Switching return means is provided.

Further, in addition to the stop prediction mode by the stop prediction means, a base mode is provided which is turned on when the speed becomes 0 during deceleration, and when the gear position is in the parking state or the parking brake is turned on.
In this case, the camera image is not displayed, and the hand switch is turned off so that the navigation screen can be forcibly switched.

Referring to FIG. 3 showing a specific operation flow of the operation control section of the present embodiment, further details including the stop prediction means of the present embodiment will be described.

In this embodiment, the vehicle speed is detected and the deceleration is detected. However, as shown in the operation flow, a brake signal is first detected. It is determined that it is not the brake deceleration stop situation, and the ON operation (camera image display) is not performed.

Further, the distance D to the intersection is determined using the navigation system. If D is greater than 100 m, it is determined that no camera image is required, and the camera is not turned on (camera image display).

As described above, when the two points (the brake detecting means and the intersection detecting means) are cleared, the deceleration α at the predetermined speed V _H (for example, 20 km / h) is detected by detecting the speed.
(Hereinafter, the stop prediction means will be described in detail).

In FIG. 3, α indicates the acceleration value itself and indicates a negative value.
1 and α2 are also negative values.

That is, in the present embodiment, as shown in FIG. 3, the acceleration α at the predetermined speed V _H is detected, and the combination of the above two means means that the brake is being decelerated and that the vehicle is close to the intersection. And that the running speed is low is a prerequisite for the ON operation.

Therefore, it is configured so that it is possible to appropriately judge that a situation requiring a camera image is close.

The stop predicting means of the present embodiment first compares the set value α2 having a smaller negative absolute value with the deceleration α in order to determine whether or not the deceleration is considerably slow. , Α2 <α, that is, |
If α2 |> | α |, it is determined that the brake is decelerated very slowly, and is turned on after Ta (sec) from the next speed pulse 0, which is counted at the time of speed detection, as a base point.
Activate to switch from navigation video to camera video and display it on the display. At this slow deceleration, since the time until the stop is long, Ta, which is the time until the ON operation is performed, is set to a large value.

On the other hand, in order to determine whether or not the vehicle is suddenly decelerated, the set value α1 having a larger negative absolute value is compared with the deceleration α, and α <α1, ie, | α |> | α1 If it is |, it is determined that rapid brake deceleration has occurred.

However, in the present embodiment, furthermore, it is impossible to accurately judge whether or not the vehicle is heading for a stop in this rapid deceleration state because the measured value of the acceleration α at this speed V _H alone is an instantaneous rapid deceleration. In addition to the vehicle deceleration calculating means 1 for comparing the set value with α, the vehicle deceleration calculating means 2
The arrival time T required from the measured speed _VH (for example, 20 km / h) to a predetermined speed _VL (for example, 10 km / h) (until deceleration by 10 km / h) is detected, and this T is compared with a predetermined set value Tα. If T ≦ Tα, it is also determined that rapid deceleration is maintained, and the camera image is switched and displayed after Tb (sec) earlier.

That is, the stop time is predicted and determined that Tb <Ta, and the time from the α and the T to the stop will be extremely short because of the rapid deceleration stop state. It is configured to operate ON.

Also, this α <α1 (| α |> | α1 |)
When T> Tα, it can be said that rapid deceleration is performed from α at V _H , but it is determined that the rapid deceleration is not maintained from T> Tα, and it is also a slow deceleration stop situation. Then, as in the case of α2 <α, an image is projected after Ta.

Α is α1 ≦ α <α2, that is, | α1 |
In the intermediate state where ≧ | α |> | α2 |
Is measured, and if T> Tβ, it is determined that the deceleration is slow, and an image is displayed after Ta. If T ≦ Tβ, the image is displayed after Tc (sec) which is an intermediate value between Ta and Tb.

That is, the comparison set value Tβ with T is set slightly smaller than the comparison set value Tα at the time of sudden braking. That is, if T is larger than Tα at the time of sudden braking, it is also for correcting and judging that the vehicle is decelerating slowly, so Tα is set to be larger than Tβ at the time of not sudden braking. Originally α is α1
And α2, T is slightly smaller than Tα.
Compared with β, when T is greater than this, it is determined that the vehicle is decelerating slowly. Otherwise, it is determined that the vehicle is in an intermediate state between rapid deceleration and slow deceleration according to the value of α, and Tb <
The image is projected after Tc where Tc <Ta.

As described above, in the present embodiment, the stop time is predicted from α and T, and the time (Ta, Tb, Tc) for determining the ON operation time is selected and determined so as to correspond to the prediction. It is configured so that it is almost always turned on in advance of a certain time immediately before stopping or at a certain intersection distance.

Therefore, there is little difference in the timing at which the display switches to the camera image due to the deceleration. Even if there is an individual difference in the braking operation, the display always switches to the camera image at a certain time before stopping or at a certain intersection distance. When the driver approaches the intersection and tries to see it, the image is switched to the camera image, and when unnecessary, the navigation image is displayed instead of the camera image. Therefore, before stopping, the driver needs to detect the situation that needs to be checked left and right, turn it on early, project the camera image on the display, and check the left and right with the naked eye that the driver actually sees with his own eyes. In addition, it is possible to provide an extremely practical vehicle camera device that can perform the left and right confirmation with a margin and can perform the confirmation promptly and smoothly.

[0050]

Since the present invention is constructed as described above, the stop time is predicted in advance by detecting the deceleration without needlessly displaying the camera image, and based on this prediction, the stop time is always predicted before the stop. By switching to the camera image at the predetermined timing, in addition to the left and right confirmation by the naked eye visually seen by the driver's own eyes, the left and right confirmation by the camera image to assist this can be done with a margin and speedy and smooth This is an epoch-making vehicle camera device with extremely high practicality.

According to the present invention, the speed detecting means for judging whether or not the vehicle is at a predetermined low speed or less may or may not be used together. Instead of (ON operation), the deceleration (deceleration) of the vehicle is detected, and this deceleration is used as a control element. That is, for example, at the time of rapid deceleration with large deceleration (negative acceleration absolute value), ON operation early, ON later than slow deceleration with small deceleration (small negative acceleration absolute value)
Operate, always ready for stop, can be controlled to turn on at a predetermined timing before stopping, in addition to the left and right confirmation by the naked eye visually seen by the driver with his own eyes, further assisted camera image It is a revolutionary vehicle camera device that is extremely practical and can be used to check the left and right with sufficient margin and to perform speedily and smoothly.

In the invention according to claims 3, 4 and 5, the operation control unit is provided with means for detecting that the vehicle is approaching an intersection by using a brake operation, a turn signal operation, or a navigation system. For example, when used in combination with the stop prediction means, a camera image is not displayed at a useless time, and a vehicle camera device with more practicality is obtained.

According to the present invention, in addition to the judgment based on the deceleration, the arrival time T up to the predetermined speed is obtained.
The stop time can be more appropriately determined by predicting the stop time by adding the determination according to the above. By determining the ON operation time according to this prediction, the ON operation is always prepared for the stop and the ON operation is performed at a predetermined timing before the stop. In addition to the left and right confirmation by the driver's own naked eye, the left and right confirmation by a camera image that assists the driver can be performed with a margin and speedy and smooth. This is a revolutionary vehicle camera device with excellent practicality.

Further, according to the invention of claim 7, the vehicle camera apparatus which is automatically returned to the navigation image at the time of starting is more excellent in practicality.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory diagram of the present embodiment.

FIG. 2 is a schematic block diagram of the present embodiment.

FIG. 3 is an explanatory diagram of an operation flow of an operation control unit (stop prediction device) of the present embodiment.

FIG. 4 is an operation explanatory view showing the present embodiment and a conventional example.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Yasuo Murakami 8-18-4 Nobomu, Niiza-shi, Saitama F-term within Honda Access Co., Ltd. (Reference) 5C054 AA01 AA05 CA04 CC03 CH04 EA01 EA05 FA04 HA28 HA30 5H180 CC04 FF05 FF22 FF27 LL02 LL04 LL15

Claims (7)

[Claims] 1. A vehicular camera device provided with a camera unit for projecting a front side of a vehicle, which often becomes a blind spot of a driver at an intersection, on a display provided in the vehicle, is provided in the front of the vehicle. An operation control unit that automatically turns on the vehicle in response to project the front side of the vehicle on the display at a predetermined time is provided, instead of simply turning on when the vehicle is stopped or when the vehicle speed becomes lower than a predetermined low speed. ,
The vehicle according to claim 1, wherein the operation control unit is configured to detect an acceleration at the time of deceleration of the vehicle, use the deceleration as a control element, and perform an ON operation before stopping or before the speed becomes equal to or lower than the predetermined low speed. Camera device. 2. During rapid deceleration in which the absolute value of the deceleration of the vehicle is equal to or greater than a predetermined value, the vehicle is turned on even before the vehicle stops or before the vehicle reaches a predetermined low speed, so that the vehicle is rapidly decelerated. 2. The vehicular camera device according to claim 1, wherein the operation control unit is configured to be turned on at an early time. 3. When the absolute value of the deceleration of the vehicle is equal to or greater than a predetermined value and a brake operation signal is detected, it is determined that the vehicle is decelerating for stopping and the vehicle is turned on to stop. The vehicular camera device according to any one of claims 1 and 2, wherein the operation control unit is configured so as to be turned on earlier earlier. 4. When the absolute value of the deceleration of the vehicle is equal to or more than a predetermined value and a direction indicator operation signal is detected, it is determined that the vehicle is decelerating to stop and the vehicle is turned on. The said operation control part was comprised so that ON operation may be performed early before stopping.
The vehicle camera device according to any one of the preceding claims. 5. When a signal indicating that the absolute value of the deceleration of the vehicle is equal to or more than a predetermined value and the distance from the intersection is equal to or less than a predetermined distance is detected by using a navigation system, switching from a navigation image is performed. The vehicle camera device according to any one of claims 1 to 4, wherein the operation control unit is configured to be turned on early before stopping at an intersection. 6. An acceleration at the time of deceleration of the vehicle is detected, and a stop time of the vehicle is predicted based on the deceleration and a time until the vehicle is decelerated to a predetermined speed. Decision, early in the case of sudden deceleration,
The vehicle camera device according to any one of claims 1 to 5, wherein the operation control unit includes a stop prediction unit so that the operation control unit is turned on later when the vehicle decelerates slowly. 7. The operation control unit is configured to prevent the ON operation when the speed of the vehicle becomes equal to or higher than a predetermined speed or increases to a predetermined acceleration after the ON operation. 7. Any one of claims 1 to 6, characterized in that:
The vehicle camera device according to the above section.