JP4561390B2 - Sun visor device for vehicle - Google Patents

Description

  The present invention relates to a vehicle sun visor device that blocks light incident on a passenger compartment in order to prevent an occupant from receiving direct sunlight on the face.

Conventionally, in a car, a sun visor is provided on the upper part of the front window glass, and when the incident light of the sun is dazzling, the occupant manually operates the sun visor so that direct sunlight does not hit the face. However, this operation is not only cumbersome, but it is dangerous to perform while driving. Therefore, in order to solve such problems, an apparatus is known in which the amount of solar radiation is detected by an optical sensor, and the sun visor is automatically controlled in accordance with the glare caused by the incidence of sunlight ( For example, see Patent Document 1).
Japanese Patent Application Laid-Open No. 7-329566

  However, in the apparatus described in Patent Document 1, it is necessary to set the setting based on the height difference of the occupant to an individual person by changing the sensor position. In addition, because the sun visor is controlled by detecting the amount of solar radiation, for example, if you receive sudden solar radiation at the moment you turn around an intersection, it will take a certain amount of time for the sun visor to actually shield the light. There is a problem of feeling uncomfortable by receiving direct sunlight on the face until the sun visor shades it.

  The present invention has been made in view of the above points, and it is an object of the present invention to prevent an occupant from feeling uncomfortable by receiving direct sunlight on the face until the sun visor blocks light.

In order to achieve the above object, according to the first aspect of the present invention, there is provided a sunscreen that is movably mounted in the vicinity of the window glass (11) of the vehicle and blocks light incident on the passenger compartment through the window glass (11). A vehicle comprising: a visor (20); drive means (21) for moving the sun visor (20); and control means (23) for controlling the position of the sun visor (20) by controlling the drive means (21). The sun visor device includes an infrared sensor (22) for detecting the position of the occupant's face, and the control means (23) determines whether or not the current weather is clear based on a signal from the infrared sensor (22). The position of the occupant's face is calculated based on the signal from the infrared sensor (22), and if it is determined that sunlight hits the occupant's face at the present time, the sunlight will enter the passenger compartment. The sun visor ( 0) is controlled, and when it is determined that sunlight does not hit the occupant's face at the present time, the position of the sun visor (20) is controlled to the storage position, and the current weather in the surrounding area is clear and the present time If it is determined that sunlight does not hit the occupant's face, whether or not a situation in which sunlight hits the occupant's face will occur is determined based on the future solar intrusion angle and the position of the occupant's face. If it is determined that a situation in which sunlight hits the occupant's face will occur in the future, before the situation in which sunlight hits the occupant's face occurs, it will be in a position that blocks sunlight from entering the passenger compartment The position of the sun visor (20) is controlled.

  According to this, in order to control the position of the sun visor in advance by predicting solar radiation, for example, when turning around an intersection, even if solar radiation enters the car from the front of the vehicle, the occupant receives direct sunlight on the face There is no discomfort.

Further , since the position of the occupant's face is always calculated, the solar radiation intrusion angle does not change, and even when the sitting posture changes, the position control of the sun visor according to the change is possible. Further, since the position of the occupant's face is calculated, it is possible to cope with individual differences in the occupant's height.

In the invention according to claim 2, calculated in the vehicle sun visor device according to claim 1, the control means (23), a future solar penetration angle based on information from the in-vehicle navigation system (10) It is characterized by doing.

  According to this, based on the current date and time, the vehicle position and the vehicle traveling direction information, it is possible to calculate an accurate solar approach angle to the vehicle that cannot be detected by the solar radiation sensor. It is possible to accurately estimate whether or not a situation in which direct sunlight will occur will occur in the future.

  In addition, by using the road gradient information, it is possible to more accurately estimate whether or not a situation in which direct sunlight hits the occupant's face will occur in the future.

  In addition, the code | symbol in the bracket | parenthesis of each said means shows the correspondence with the specific means as described in embodiment mentioned later.

(First embodiment)
An embodiment of the present invention will be described. FIG. 1 is a schematic configuration diagram of a vehicle sun visor device according to an embodiment, FIG. 2 is a block diagram of the vehicle sun visor device according to an embodiment, and FIG. 3 is a program executed by the sun visor ECU of FIG. It is a flowchart.

  As shown in FIGS. 1 and 2, a navigation device 10 that performs route guidance is mounted on a vehicle on which the vehicle visor device according to the present embodiment is mounted.

  In the vicinity of the front window glass 11 of the vehicle, a sun visor 20 made of a translucent acrylic sheet that blocks light that passes through the front window glass 11 and enters the passenger compartment is mounted. The sun visor 20 is driven by a motor 21 and is moved along the front window glass 11 in the vehicle front-rear direction. More specifically, the sun visor 20 covers a part of the front window glass 11 and blocks the light incident on the passenger compartment, and the storage is stored in the vehicle ceiling part outside the area of the front window glass 11. Move between positions. The motor 21 corresponds to the driving means of the present invention.

  A multi-pixel infrared sensor 22 that generates an electromotive force proportional to the amount of infrared rays of the test body is attached in the vicinity of the room mirror. The infrared sensor 22 is the temperature of the upper body of the front passenger and the temperature of the side glass 12. The temperature of the rear tray is measured.

  Then, the position of the face of the front seat occupant is obtained from the temperature distribution of each part detected by the infrared sensor 22. Moreover, since the temperature of the side glass 12 and the temperature of the rear tray are easily affected by the amount of solar radiation, in this embodiment, the amount of solar radiation is estimated from these temperatures. The infrared sensor 22 corresponds to the face position detecting means of the present invention.

  The sun visor ECU 23 controls the position of the sun visor 20 by controlling the motor 21 and includes a well-known microcomputer including a CPU, ROM, RAM, etc. (not shown), and performs arithmetic processing according to a program stored in the microcomputer. Is. The sun visor ECU 23 corresponds to the control means of the present invention.

  The sun visor ECU 23 receives information such as the vehicle traveling direction, the course prediction information, the vehicle horizontal angle (that is, the road gradient), the current time, and the like from the navigation ECU 10 a of the navigation device 10. Further, the signal from the infrared sensor 22 is input to the sun visor ECU 23.

  Next, the operation of the vehicle sun visor device according to the present embodiment will be described based on the flowchart shown in FIG.

  First, it is determined whether or not the surrounding current weather is clear (step 100). This determination may be performed based on the amount of solar radiation obtained from the data history of the infrared sensor 22, or may be used if there is current weather information in the navigation ECU 10a.

  If it is clear (YES in step 100), the position of the sun is calculated based on the current time and position information obtained by GPS (step 110), and the face of the front seat occupant is calculated based on the signal from the infrared sensor 22. Is calculated (step 120), and the solar radiation intrusion angle (sunlight incident angle) into the vehicle is calculated based on the traveling direction of the vehicle, the horizontal angle, and the position of the sun (step 130).

  Next, in the case of the solar intrusion angle calculated in step 130, it is determined whether or not direct sunlight is applied to the face of the front seat occupant (step 140).

  If it is determined that the front passenger's face is exposed to direct sunlight (YES in step 140), the optimal position of the sun visor 20 is calculated based on the position of the passenger's face and the solar radiation approach angle (step 150). Then, the motor 21 is controlled so that the sun visor 20 moves to the optimum position (step 160). Incidentally, the optimal position of the sun visor 20 at this time is a position where the range that blocks the sight of the occupant is as small as possible, and the direct sunlight can be surely prevented from hitting the occupant's face.

  As described above, it is possible to automatically prevent the passenger from receiving direct sunlight on the face.

  On the other hand, if it is determined that direct sunlight does not hit the face of the front seat occupant (NO in step 140), it is determined whether the navigation device 10 is currently in route guidance (step 170).

  If route guidance is in progress (YES at step 170), the position of the sun is calculated from route information after a certain time in the future, and the occupant's face is calculated based on the solar radiation intrusion angle and the position of the occupant's face after a certain time. It is determined whether or not a situation in which direct sunlight hits after a certain time occurs (step 180).

  If it is determined that the situation where the occupant's face is exposed to direct sunlight occurs after a certain time (step 180 is YES), the optimum of the sun visor 20 is determined based on the position of the occupant's face and the solar radiation approach angle after a certain time. The position is calculated (step 150), and the motor 21 is controlled so that the sun visor 20 moves to the optimum position (step 160).

  In this way, the sun visor 20 is predicted at the position where the sunlight is predicted based on the route information of the navigation device 10 and the sunlight is not incident on the passenger compartment before the situation where the occupant's face is exposed to direct sunlight. By controlling the position of the vehicle, for example, even when solar radiation enters the vehicle from the front of the vehicle when turning at an intersection, the occupant does not feel uncomfortable by receiving direct sunlight on the face.

  If the current weather around the area is not sunny (NO in step 100), or if the front passenger's face is not exposed to direct sunlight (NO in step 140) and route guidance is not being performed (NO in step 170) In addition, when it is determined that no direct sunlight has been applied to the face of the front passenger (step 140 is NO) and that no direct sunlight has been applied to the passenger's face after a certain period of time (step 180). NO), the motor 21 is controlled so that the sun visor 20 moves to the storage position (step 190). This prevents the occupant's view from being obstructed by the sun visor 20.

  In the present embodiment, when it is determined that direct sunlight is applied to the face of the front seat occupant based on the position of the occupant's face and the sunlight intrusion angle, the sun visor 20 is positioned at a position where direct sunlight can be prevented from being applied to the occupant's face. Since the vehicle is automatically moved, it is possible to automatically prevent the passenger from receiving direct sunlight on the face.

  Further, since the position of the occupant's face is always calculated, the solar radiation intrusion angle does not change, and the position control of the sun visor 20 according to the change is possible even when the sitting posture changes.

  Further, since the position of the occupant's face is calculated, it is possible to cope with individual differences in the occupant's height.

  In addition, since the position of the sun visor 20 is controlled at a position that blocks sunlight from entering the passenger compartment before the situation where the occupant's face is exposed to direct sunlight, the vehicle is, for example, turned at an intersection. Even when solar radiation enters the car from the front, the passenger does not feel uncomfortable by receiving direct sunlight on the face.

  In addition, the current date and time, the vehicle position, and the vehicle traveling direction information can be used to calculate the exact solar incident angle that cannot be detected by the solar radiation sensor, and direct sunlight on the passenger's face. It is possible to accurately estimate whether or not a situation of hitting will occur in the future.

  In addition, by using the road gradient information, it is possible to more accurately estimate whether or not a situation in which direct sunlight hits the occupant's face will occur in the future.

(Other embodiments)
In the above embodiment, the position of the face of the front seat occupant is obtained from the temperature distribution of each part detected by the infrared sensor 22, but instead of the infrared sensor 22, the image sensor converts the optical image into an electrical signal and outputs it. And the position of the face of the front seat occupant may be obtained by image analysis.

  Moreover, in the said embodiment, although the solar radiation prediction based on the route information of the navigation apparatus 10 and the position control of the sun visor 20 were performed with a fixed period, the time which a vehicle advancing direction changes based on route information, and a vehicle advancing direction is obtained. You may make it perform solar radiation prediction and position control of the sun visor 20 before the fixed time to change.

It is a typical lineblock diagram of the sun visor device for vehicles concerning one embodiment of the present invention. It is a block diagram of the sun visor device for vehicles concerning one embodiment of the present invention. 3 is a flowchart of a program executed by the sun visor ECU of FIG. 2.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Window glass, 20 ... Sun visor, 21 ... Motor (drive means), 23 ... Sun visor ECU (control means).

Claims (2)

A sun visor (20) that is movably mounted in the vicinity of the window glass (11) of the vehicle and blocks light incident on the passenger compartment through the window glass (11) and the sun visor (20) are moved. In a vehicle sun visor device comprising: drive means (21); and control means (23) for controlling the position of the sun visor (20) by controlling the drive means (21).
An infrared sensor (22) for detecting the position of the occupant's face;
The control means (23)
Determining whether the current weather is clear based on the signal from the infrared sensor (22);
Calculating the position of the occupant's face based on the signal from the infrared sensor (22);
If it is determined that sunlight hits the occupant's face at the present time, the position of the sun visor (20) is controlled to a position that blocks sunlight from entering the passenger compartment.
If it is determined that sunlight does not hit the occupant's face at this time, the position of the sun visor (20) is controlled to the storage position,
If it is determined that the current weather in the surrounding area is sunny and sunlight does not shine on the occupant's face at the present time, the occupant's face is exposed to sunlight based on the future solar intrusion angle and the position of the occupant's face. If it is determined whether or not a future situation will occur and if it is determined that a situation in which sunlight hits the occupant's face will occur in the future, before the situation in which sunlight hits the occupant's face occurs, car dual sun visor device you and controlling the position of the sun visor (20) in a position to block from entering into the casing. The vehicle sun visor device according to claim 1, wherein the control means (23) calculates a future solar intrusion angle based on information from a navigation device (10) mounted on the vehicle.

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