JP3431688B2 - Light receiving sensor device for vehicles - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION This invention is, to the outside of the vehicle illumination of light received
A vehicle equipped with a light-receiving element that generates an electric signal of a corresponding level
The present invention relates to a vehicle light-receiving sensor arrangement structure in which the light-receiving sensitivity of the light-receiving sensor is improved by devising the arrangement position of the dual-purpose light-receiving sensor.

[0002]

2. Description of the Related Art Conventionally, in this type of vehicle light receiving sensor device, a light receiving sensor has been arranged indoors. For example, the light receiving sensor disclosed in Japanese Utility Model Laid-Open No. 58-139238 is provided on an instrument panel.

[0003]

However, in the above-mentioned prior art, since the light receiving sensor is installed indoors, the amount of light transmitted through the glass is reduced by the heat ray absorption treatment applied to the glass, and the light receiving sensitivity of the light receiving sensor is reduced. There was a problem of decrease. Further, the retrofitting property to the vehicle is poor, and in the case of retrofitting as an option, the light receiving sensor is installed at a relatively conspicuous position such as the upper surface of the instrument panel, which is not preferable in terms of design.

[0004]

SUMMARY OF THE INVENTION The present invention is intended to solve the problem described above, improves simply by devising the arrangement position of the light receiving sensitivity of the light receiving sensor vehicle, vehicle
It is intended to provide an arrangement structure of a vehicle light receiving sensor to easily mounted in a position inconspicuous use light receiving sensor.

In order to achieve the above object, the present invention emits an electric signal of a level according to the received illuminance outside the vehicle.
Arrangement to <br/> Oite vehicle light receiving sensor having a light receiving element for life, front the vehicle light receiving sensor (1) of the vehicle
Glass (22) or is arranged in the vehicle exterior side of the rear glass,
In addition, the light receiving direction (S) is changed to the windshield (22) or
Providing the arrangement structure of a vehicle receiving sensor <br/>, characterized in that set in the direction reflected light (L2) arrives from the rear glass.

In the above invention, the light receiving sensor for a vehicle is arranged in front of a windshield, and the light receiving direction thereof is set to a direction in which a reflected light beam from the windshield arrives . Providing a layout structure .

Further, in the above invention, the vehicle light receiving sensor is arranged on the back surface of the bonnet , and the light receiving direction is
Provided is a vehicle light receiving sensor arrangement structure, which is set in a direction in which a reflected light beam from a windshield arrives .

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment according to the present invention is shown in FIGS.
It will be explained based on. In the drawing, 1 is a light receiving sensor and 2 is a vehicle.

First, the light receiving sensor 1 is composed of a filter 11, waterproof rings 12 and 16, an aperture 13, a light receiving element 14, a case 15, a cover 17, a substrate 18, another electronic element 19 and a bracket 10 as shown in FIG. It was done.

More specifically, first, the filter 11 is made of a transparent resin, and covers the front surface of the diaphragm 13, and a waterproof ring 12 is sandwiched between the filter 11 and the case 15, so that water drops are introduced into the case 15. Prevents intrusion.

The light receiving element 14 is an element for generating an electric signal having a level corresponding to the received illuminance outside the vehicle, and is composed of a photodiode or the like. The light receiving element 14
Is mounted on the substrate 18 together with other elements 19 to form a predetermined electric circuit.

On the opposite side of the case 15, the waterproof ring 1 is provided.
A cover 17 is attached with 6 in between. The cover 17 has a connector 17a, and the terminal 18a of the substrate 18 is press-fitted into the hole 17b to form a watertight structure. Further, the case 15 includes the holder 15a
Is integrally formed on the holder 15a and the bracket 10 is attached to the holder 15a.
Are fitted.

The bracket 10 is a component for attaching the light receiving sensor 1 to the rib 24 on the back surface of the hood 23 of the vehicle 2. The bending angle θ applied to the bracket 10 may be appropriately set so that the light receiving direction S of the light receiving sensor 1 is oriented in an optimum direction.

In the light receiving sensor 1 having the above structure, the bracket 10 is fixed to the rib 24 of the bonnet 23 by using the tapping screw 25 as shown in FIG. It goes without saying that the bracket 10 can be fixed by using other suitable means instead of the tapping screw 25.

Next, the operation will be described. First, as shown in FIG. 1, the light ray L1 outside the vehicle is reflected by the windshield 22 of the vehicle 2, and the reflected light ray L2 irradiates the inside of the hood 23. The light receiving sensor 1 has a windshield 2 in the light receiving direction S.
The light ray L2 reflected from the windshield 22 is directed into the case 15 through the filter 11 and the diaphragm 13 and is received by the light receiving element 14.

The light receiving element 14 receives the reflected light beam L received.
Generates an electric signal according to the brightness of 2
Amplification and waveform processing are added by 9 and input to a write controller (not shown) in the subsequent stage. The light controller, based on the electric signal input from the light receiving sensor 1,
The brightness outside the vehicle is determined, and when the brightness corresponds to the brightness at dusk or at night, or the brightness inside the tunnel, the lighting lamp 21 is automatically controlled to be turned on.

Now, the effect of the present invention will be compared with the prior art. FIG. 4 shows an actual measurement of the electrical characteristics of the light receiving sensor 1 with respect to the received light ray, that is, the reflected light ray L2. The characteristic according to the present invention in which the light receiving sensor 1 is arranged on the back surface of the hood 23 is shown by a characteristic curve A, A characteristic curve B shows the characteristic of the conventional technique in which the same light receiving sensor 1 is arranged indoors.

As described above, when the reflected light beam L2 from the windshield 22 is received by the light receiving sensor 1 as in the prior art, the light receiving sensitivity is remarkably improved as compared with the prior art in which light is received indoors.

Although the light receiving sensor is arranged on the back surface of the bonnet in the above embodiment, the invention is not limited to this.
For example, it may be arranged on the trunk door at the rear of the vehicle so as to receive the light rays reflected by the rear glass. Further, in order to improve the reflection efficiency of the glass, for example, a reflection film such as an aluminum foil may be attached to the lower end portion of the glass, or a surface treatment for reflection may be performed. Further, the reflected light beam of the glass may be guided to the light receiving sensor using a light guide, a reflecting plate or the like.

[0020]

Since the present invention has the above-mentioned structure and operation, it has the following effects. (1) The light-receiving sensitivity of the light-receiving sensor can be improved simply by devising the arrangement position, and when improving the light-receiving sensitivity, it is not necessary to remodel the circuit of the light-receiving sensor at any cost. (2) The light-receiving sensor can be mounted in an inconspicuous position without damaging the vehicle design. (3) The light receiving sensor can be retrofitted to the vehicle.

[Brief description of drawings]

FIG. 1 is a detailed view of essential parts showing a preferred embodiment of the present invention.

FIG. 2 is a partially cutaway side view of a vehicle equipped with the light receiving sensor shown in FIG.

FIG. 3 is an exploded perspective view of the light receiving sensor shown in FIG.

FIG. 4 is an electrical characteristic diagram of what is shown in FIG.

[Explanation of symbols]

1 Light receiving sensor 2 vehicles 10 bracket 11 filters 13 Aperture 14 Light receiving element 15 cases 21 Lighting 22 windshield 23 Bonnet 24 ribs L1 exterior light beam L2 reflected ray S light receiving direction

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) G01J 1/02 G01J 1/42 G01W 1/12 B60Q 1/02 H05K 37/00-37/02

Claims (3)

(57) [Claims] 1. A level of electricity according to the received illuminance outside the vehicle
Distribution of the vehicle light receiving sensor having a light receiving element for generating a signal
In the stationary structure , the vehicle light receiving sensor (1) is provided on a windshield of the vehicle.
(22) or the passenger compartment is disposed outside of the rear glass, and that it has set its receiving direction (S) in the direction of reflection light from the front glass (22) or rear <br/> glass (L2) is reached A characteristic vehicle light-receiving sensor arrangement structure . 2. The invention according to claim 1, wherein the vehicle light receiving sensor (1) is provided with a windshield (22).
And a light receiving direction (S) thereof is set in a direction in which a reflected light ray (L2) from the windshield (22) arrives. 3. The invention according to claim 1 or 2, wherein the vehicle light receiving sensor (1) is arranged on the back surface of the hood (23) , and the light receiving direction (S) is in the windshield.
Set in the direction in which the reflected light (L2) from (22) arrives
Arrangement structure for a vehicle light receiving sensor, characterized in that the.