JP6943177B2 - External information acquisition device - Google Patents

Description

The present invention has a windshield for a vehicle and a light receiving portion that is arranged so as to face the vehicle interior side surface of the windshield and receives light through the windshield, and the light received by the light receiving portion. The present invention relates to an external information acquisition device including an information acquisition unit that acquires information outside the vehicle based on the above.

In recent years, various driving support controls have been developed and implemented to support the driving of the driver of the vehicle. In order to carry out such driving support control, information outside the vehicle (typically, information in front of the vehicle, specifically, the distance to the preceding vehicle and the speed of the preceding vehicle) is acquired. There is a need. Therefore, an information acquisition unit having a light receiving unit that receives light passing through the windshield is installed in the vehicle, and information on the outside of the vehicle is acquired based on the light received by the light receiving unit. In the following, the information outside the vehicle is also simply referred to as "external information".

By the way, when the temperature inside the vehicle is relatively high with respect to the outside of the vehicle, the surface of the windshield on the passenger compartment side may become cloudy due to dew condensation. If the windshield becomes cloudy, the information acquisition unit may not be able to receive light accurately, and external information may not be acquired properly. Therefore, for example, Patent Document 1 discloses a technique for preventing fogging of a portion of the windshield through which the light received by the information acquisition unit passes by providing a film or coating having hygroscopicity and transparency. Has been done. In the following, the said portion will also be referred to as a “passing portion”.

International Publication No. 2016/1299699

According to the technique of Patent Document 1, although it is possible to suppress the occurrence of a situation in which the information acquisition unit cannot properly acquire external information due to cloudiness of the windshield, the external information can be appropriately acquired due to another factor. It may not be possible to obtain it. That is, in the hygroscopic film and coating, the hygroscopic material constituting the film and coating may change in quality with the passage of years, and the light transmittance may decrease. In this case, if a hygroscopic film or coating is provided on the passing portion, the light transmittance in the passing portion decreases with the passage of years, and as a result, the information acquisition unit cannot receive the light accurately, and the outside Information may not be obtained properly.

The present invention has been made to solve the above-mentioned problems, and one of the purposes thereof is to appropriately acquire external information regardless of the passage of years while suppressing fogging of the passing portion due to dew condensation. It is to provide the technology that makes it possible.

The external information acquisition device (10) of the present invention is
Windshield (12) for vehicles and
A light receiving unit (24) that is arranged so as to face the vehicle interior side surface (14) of the windshield (12) and receives light that passes through a passing portion (26) that is a part of the windshield (12). And information acquisition units (16, 20) that acquire information outside the vehicle based on the light received by the light receiving unit (24).
A hygroscopic member (18) containing a hygroscopic material and
With
At least a part (20e) of the outer surface of the information acquisition unit (16, 20) and a part of the vehicle interior side surface (14) of the windshield (12) are the vehicle interior side of the passing portion (26). The surface (14) and the light receiving portion (24) are exposed and form an internal space (Si) partitioned from the space (Sc) constituting the vehicle interior.
In this external information acquisition device (10),
The internal space (Si) is configured to communicate with the space (Sc) constituting the passenger compartment through a slit-shaped gap (S11, S12, S13, S21, S22).
The hygroscopic member (18) is, before SL gap a site comprising (S11, S12, S13, S21, S22) and the light and received in the light receiving portion through passing portion (26) (24) It is arranged in a part other than the path of.

In the external information acquisition device of the present invention (hereinafter, also referred to as "the device of the present invention"), instead of providing a hygroscopic member containing a hygroscopic material in the passing portion, " a portion including a gap and a passing portion is provided. It is arranged in a portion other than the path of light that passes through and is received by the light receiving portion. Here, between gap the internal space (is exposed cabin side surface of the passage unit and the light receiving portion, and the space which is partitioned from the space constituting the vehicle compartment) and space constituting the cabin and It is a slit-shaped space that communicates. That is, when the air in the space constituting the vehicle interior flows into the internal space, it always passes through the gap. In the following, the space constituting the passenger compartment is also referred to as "cabin space".

By the way, dew condensation on the vehicle interior side surface of the passing portion generally occurs as follows. That is, when the air in the passenger compartment space containing water vapor flows into the internal space through the gap and the temperature of the internal space is equal to or lower than the dew point of the inflowing air, a part of the water vapor condenses into the internal space. Condensation occurs due to the adhesion of water vapor to the surface of the exposed passage on the passenger compartment side.

Therefore, in the configuration of the apparatus of the present invention in which the hygroscopic member is arranged in the gap, the air in the vehicle interior space comes into contact with the hygroscopic member arranged in the gap before flowing into the internal space. As a result, at least a part of the water vapor contained in the air is absorbed by the hygroscopic member. As a result, the amount of water vapor is reduced to be included in the air flowing into the inner space, since the dew point of the air is lowered, Ru can reduce the possibility that the temperature of the internal space is below the dew point of the air.
It slaves, according to the configuration of the apparatus of the present invention, it is possible to suppress the passing portion without providing the hygroscopic member is fogged by condensation in the passage portion (surface of the cabin side of). In addition, since the hygroscopic member is not provided in the passing portion in the apparatus of the present invention, the light transmittance in the passing portion does not decrease due to aged deterioration of the hygroscopic member, and external information is provided regardless of the passage of years. Can be obtained appropriately. In this specification, light is defined as a concept including electromagnetic waves.

Further, in the apparatus of the present invention, since the hygroscopic member is not provided in the passing portion, the hygroscopic member is not required to be transparent. Therefore, the degree of freedom in selecting the hygroscopic member is improved.

In the above description, in order to help the understanding of the invention, the reference numerals used in the embodiments are attached in parentheses to the configurations of the invention corresponding to the embodiments, but each constituent requirement of the invention is the above-mentioned reference numerals. It is not limited to the embodiment defined by.

It is a top view of the external information acquisition apparatus which concerns on embodiment of this invention. FIG. 5 is a partial cross-sectional view taken along the line II-II of FIG. It is a partially enlarged view of the upper center of the external information acquisition device of FIG. FIG. 3 is a diagram showing a state in which the camera sensor of the information acquisition unit is removed from the external information acquisition device of FIG. FIG. 3 is a partial cross-sectional view taken along the line VV of FIG. FIG. 3 is a partial cross-sectional view taken along the line VI-VI of FIG. FIG. 3 is a partial cross-sectional view taken along the line VII-VII of FIG. 3, and is a diagram for explaining how the film is attached to the gap formed in the recess of the bracket. FIG. 3 is a partial cross-sectional view taken along the line VIII-VIII of FIG. 3 for explaining how the film is attached to the gap formed in the recess of the bracket. FIG. 3 is a partial cross-sectional view taken along the line IX-IX of FIG. 3 for explaining how the film is attached to the gap formed in the recess of the bracket.

The external information acquisition device 10 according to the present embodiment will be described with reference to FIGS. 1 to 9. The scale of the drawings in this embodiment may differ from the actual scale in order to clearly indicate the configuration of each member. In addition, in FIGS. 2, 5 and 6, in order to make the figure easier to see, the members located on the back side of the cross section (the back side of the paper surface of FIGS. 2, 5 and 6) are omitted, and only the cross section is shown. Shown.

As shown in FIGS. 1 to 3, the external information acquisition device 10 includes a windshield 12, an information acquisition unit (16, 20), and a film 18 (18a, 18b, 18c, 18d, 18e, 18f). Be prepared.

The windshield 12 has a glass plate 12a and a ceramic line 12b. The glass plate 12a is transparent and is used as a windshield of a vehicle. The vertical and horizontal directions of the glass plate 12a in FIG. 1 are the same as the vertical and horizontal directions when the windshield when the glass plate 12a constitutes the vehicle as the windshield is viewed from the passenger compartment side. That is, when the wheels of the vehicle are in contact with the ground, the direction from the inside of the vehicle toward the ground is the downward direction in FIG. 1, the opposite direction is the upward direction in FIG. 1, and the left direction with respect to the front of the vehicle is shown in FIG. The left direction in 1 and the opposite direction are the right direction in FIG. For the glass plate 12a, a well-known glass plate suitable for the windshield of a vehicle can be used (for details, refer to International Publication No. 2016/1299699).

The ceramic line 12b covers the entire outer periphery of one surface of the glass plate 12a (specifically, a surface that will be located on the vehicle interior side after the vehicle is completed. Hereinafter, also referred to as a "vehicle interior side surface"). It is printed over the circumference (see FIG. 1). The ceramic line 12b is an opaque dark color (typically black) line, and the passage of light is blocked in the portion where the ceramic line 12b is printed. The ceramic line 12b is mainly used for an adhesive used when assembling the windshield 12 to the vehicle body and for fixing another member (for example, a bracket 16 described later and a rearview mirror (not shown)) to the windshield 12. It has a role of preventing the adhesive strength of the adhesive (including double-sided tape) from being deteriorated by sunlight. As shown in FIGS. 1 and 3, the ceramic line 12b has a protruding portion 12b1 protruding downward in the upper center of the glass plate 12a. The bracket 16 and the rearview mirror (not shown) are fixed to the protrusion 12b1 (described later). The ceramic line 12b can be printed on the glass plate 12a using a well-known method (see WO 2016/129699 for details).

As shown in FIGS. 2 and 4, a rectangular opening 13 is formed in the protruding portion 12b1 of the ceramic line 12b. The glass plate 12a is exposed from the opening 13. That is, at the opening 13, light can pass through the windshield 12. As shown in FIG. 2, the portion where the ceramic line 12b is printed is slightly raised with respect to the glass plate 12a. However, for convenience of explanation, in the following, "the surface of the ceramic line 12b on the passenger compartment side" and "the surface of the glass plate 12a on which the ceramic line 12b is not printed on the passenger compartment side" are regarded as continuous surfaces. Collectively referred to as "the surface 14 of the windshield 12".

As shown in FIGS. 1 and 3, the information acquisition unit (16, 20) has a bracket 16 and a camera sensor 20. The bracket 16 is fixed to the portion of the surface 14 of the windshield 12 where the protrusion 12b1 is located by a double-sided tape (not shown). As shown in FIG. 3, the bracket 16 is a substantially rectangular tubular member, and is composed of a wall portion 16a, a wall portion 16b, a wall portion 16c, and a wall portion 16d. The wall portion 16a faces the wall portion 16c and is located on the left side of the wall portion 16c. The wall portion 16b faces the wall portion 16d and connects the lower end of the wall portion 16a and the lower end of the wall portion 16c. The wall portion 16d connects the upper end of the wall portion 16a and the upper end of the wall portion 16c. The bracket 16 surrounds the opening 13.

As shown in FIGS. 2 and 3, the camera sensor 20 has a locking portion (not shown), and by locking the locking portion to a locked portion (not shown) of the bracket 16, the camera sensor 20 has a locking portion (not shown). 20 is locked to the bracket 16. The camera sensor 20 has a substantially rectangular parallelepiped shape, and its outer surface is composed of surfaces 20a to 20f. Specifically, the surface 20a, the surface 20b, the surface 20c and the surface 20d form the side peripheral surface of the camera sensor 20 (see FIG. 3), and the surface 20e constitutes the surface of the camera sensor 20 on the windshield 12 side. (See FIGS. 2, 5 and 6), and the surface 20f constitutes a surface of the camera sensor 20 on the vehicle interior side (see FIGS. 2, 3, 5 and 6).

As shown in FIGS. 2, 5 and 6, the camera sensor 20 is arranged so as to face the surface 14 of the windshield 12. More specifically, as shown in FIGS. 2 and 5, the camera sensor 20 has an irradiation unit 22 and a light receiving unit 24 provided on the surface 20e. The irradiation unit 22 and the light receiving unit 24 are provided at positions of the windshield 12 facing the portion 26 exposed from the opening 13 (that is, the portion of the protruding portion 12b1 where the glass plate 12a is exposed). ing. The irradiation unit 22 irradiates the front of the vehicle with light (for example, infrared rays) through the portion 26. The light receiving unit 24 receives the light reflected by the object existing in front of the vehicle through the portion 26. That is, the portion 26 is a portion through which the light emitted by the camera sensor 20 and the light received by the camera sensor 20 pass. Therefore, in the following, the portion 26 will be referred to as a “passing portion 26”. The camera sensor 20 acquires information in front of the vehicle (for example, the distance to the object and the speed of the object) based on the light emitted by the irradiation unit 22 and the light received by the light receiving unit 24.

As shown in FIGS. 1 to 9, a plurality of films 18 (18a, 18b, 18c, 18d, 18e, 18f) are attached to the windshield 12 and the bracket 16 around the passing portion 26. The film 18 is a hygroscopic member containing a hygroscopic material, and has one surface having adhesiveness and the other surface having no adhesiveness. The other surface of the film 18 has a property of absorbing water vapor contained in the air in contact with the surface. As the film 18, a well-known film having hygroscopicity can be used (for details, refer to International Publication No. 2016/1299699). Hereinafter, the positions where the films 18a to 18f are attached will be described in detail. The film 18 corresponds to an example of a "hygroscopic member".

First, the attachment positions of the films 18a to 18c will be described. As described above, the bracket 16 is fixed to the surface 14 of the windshield 12 with double-sided tape. That is, each bottom surface (the surface on the windshield side) of the wall portion 16a to the wall portion 16d is in contact with the surface 14. However, as shown in FIG. 7, a recess 16a1 is formed in a part of the bottom surface of the wall portion 16a in the longitudinal direction. The recess 16a1 penetrates the wall portion 16a in the lateral direction (see FIG. 5), and in the recess 16a1, the bottom surface of the wall portion 16a does not contact the surface 14. That is, a slit-shaped gap S11 is formed in the recess 16a1 between the wall portion 16a and the windshield 12 (see FIGS. 5 and 7).

Similarly, as shown in FIG. 8, a recess 16b1 is formed in a part of the bottom surface of the wall portion 16b in the longitudinal direction. The recess 16b1 penetrates the wall portion 16b in the lateral direction (see FIG. 2), and in the recess 16b1, the bottom surface of the wall portion 16b does not contact the surface 14. That is, a slit-shaped gap S12 is formed in the recess 16b1 between the wall portion 16b and the windshield 12 (see FIGS. 2 and 8).

Similarly, as shown in FIG. 9, a recess 16c1 is formed in a part of the bottom surface of the wall portion 16c in the longitudinal direction. The recess 16c1 penetrates the wall portion 16c in the lateral direction (see FIG. 5), and in the recess 16c1, the bottom surface of the wall portion 16c does not contact the surface 14. That is, a slit-shaped gap S13 is formed in the recess 16c1 between the wall portion 16c and the windshield 12 (see FIGS. 5 and 9).

As shown in FIGS. 2 and 5, the surface 20e of the camera sensor 20 and a part of the surface 14 of the windshield 12 are exposed on the vehicle interior side surface of the passing portion 26, the irradiation portion 22 and the light receiving portion 24. It constitutes the internal space Si. The internal space Si is partitioned from a space Sc (hereinafter, also referred to as "vehicle interior space Sc") constituting the vehicle interior. The internal space Si communicates with the vehicle interior space Sc via the gap S11, the gap S12, and the gap S13. That is, when the air in the vehicle interior space Sc flows into the internal space Si, it passes through the gap S11, the gap S12, and the gap S13.

The film 18a is attached to (the surface 14) of the windshield 12 (the surface 14) of the portion exposed in the gap S11 (see FIGS. 3, 4, 5 and 7). The film 18b is attached to (the surface 14) of the windshield 12 (the surface 14) of the portion exposed in the gap S12 (see FIGS. 2 to 4 and 8). The film 18c is attached to the windshield 12 (the surface 14) of the portion exposed in the gap S13 (see FIGS. 3, 4, 5 and 9).

Next, the sticking position of the film 18d will be described. As shown in FIGS. 2 and 6, the film 18d is printed with a portion of the surface 14 of the windshield 12 constituting the internal space Si, other than the surface 14 of the passing portion 26 (in other words, the ceramic line 12b is printed). It is affixed to the part). As described above, the surface 14 of the passing portion 26 faces the irradiation unit 22 and the light receiving unit 24 of the camera sensor 20, and is on the path of the light emitted from the irradiation unit 22 and the light received by the light receiving unit 24. It is the part where it is located. Therefore, it can be said that the film 18d is "attached to a portion of the surface 14 of the windshield 12 other than the path of the light emitted from the irradiation unit 22 and the light received by the light receiving unit 24".

Subsequently, the attachment positions of the film 18e and the film 18f will be described. As shown in FIGS. 3, 5 and 6, the length of the camera sensor 20 in the left-right direction (that is, the length from the surface 20a to the surface 20c) is the length from the inner wall of the wall portion 16a of the bracket 16 to the wall portion 16c. It is smaller than the length to the inner wall. On the other hand, the vertical length of the camera sensor 20 (that is, the length from the surface 20d to the surface 20b) is substantially equal to the length from the inner wall of the wall portion 16d of the bracket 16 to the inner wall of the wall portion 16b. In addition, when the camera sensor 20 is locked to the bracket 16, a part of the camera sensor 20 (a portion on the surface 20f side) protrudes (protrudes) from the bracket 16.

The camera sensor 20 is locked to the bracket 16 so that the center line in the left-right direction of the camera sensor 20 substantially coincides with the center line in the left-right direction of the bracket 16. Therefore, the bracket 16 covers a part of the outer surface of the camera sensor 20. Specifically, the wall portion 16a and the wall portion 16c of the bracket 16 cover a part of the surface 20a and a part of the surface 20c of the camera sensor 20 at intervals (see FIGS. 5 and 6). .. The wall portion 16b and the wall portion 16d of the bracket 16 cover a part of the surface 20b and a part of the surface 20d of the camera sensor 20, respectively (see FIG. 2).

As shown in FIGS. 5 and 6, in this configuration, a slit-shaped gap S21 is formed between the camera sensor 20 and the wall portion 16a, and a slit is formed between the camera sensor 20 and the wall portion 16c. A shaped gap S22 is formed. The internal space Si communicates with the vehicle interior space Sc through these gaps S21 and S22. That is, when the air in the vehicle interior space Sc flows into the internal space Si, it passes through the gap S21 and the gap S22. As shown in FIGS. 3 and 6, the film 18e is attached to the bracket 16 (the inner wall of the wall portion 16a) of the portion exposed to the gap S21, and the film 18f is exposed to the gap S22. It is attached to the bracket 16 (the inner wall of the wall portion 16c) of the portion.

The operation and effect of the external information acquisition device 10 in the present embodiment will be described. In the conventional external information acquisition device, in order to prevent the portion through which the light emitted from the camera sensor and the received light passes (that is, the portion corresponding to the passing portion 26 of the present embodiment) from becoming cloudy due to dew condensation. , A film or coating containing a hygroscopic material was attached or applied to the portion. However, in this configuration, if the film or coating deteriorates over time and the light transmittance decreases, the camera sensor may not be able to properly acquire information in front of the vehicle.

On the other hand, in the external information acquisition device 10 of the present embodiment, instead of attaching the film 18 containing the hygroscopic material to the passing portion 26, "the windshield 12 and the bracket 16 exposed in the gap S11 to the gap S22" are used. And "a portion of the surface 14 constituting the internal space Si other than the passing portion 26". In the configuration in which the film 18 is attached to the former position, the air in the vehicle interior space Sc is attached to the windshield 12 and the bracket 16 exposed in the gaps S11 to S22 before flowing into the internal space Si. It comes into contact with 18a, 18b, 18c, 18e, 18f, whereby at least a portion of the water vapor contained in the air is absorbed by these films. As a result, the amount of water vapor contained in the air flowing into the internal space Si is reduced, and the dew point of the air is lowered, so that the possibility that the temperature of the internal space Si is lower than the dew point of the air can be reduced.
On the other hand, in the configuration in which the film 18 is attached to the latter position, the air in the vehicle interior space Sc comes into contact with the film 18d attached to the above position immediately after flowing into the internal space Si through the gap S11 to S22. As a result, at least a part of the water vapor contained in the air flowing into the internal space Si is immediately absorbed by the film 18d. As a result, the amount of water vapor contained in the air flowing into the internal space Si is reduced, and the dew point of the air is lowered, so that the possibility that the temperature of the internal space Si is equal to or lower than the dew point of the air can be reduced.
Therefore, according to the configuration of the external information acquisition device 10 according to the present embodiment, it is possible to prevent the passing portion 26 from becoming cloudy due to dew condensation without attaching the film 18 to the passing portion 26 (surface 14). In addition, since the film 18 is not attached to the passing portion 26 in the present embodiment, the light transmittance in the passing portion 26 does not decrease due to the aged deterioration of the film 18, and the vehicle is not affected by the passage of years. It becomes possible to appropriately acquire the information ahead.

Further, in the present embodiment, since the film 18 is not attached to the passing portion 26, the film 18 is not required to be transparent. Therefore, the degree of freedom in selecting the material of the film 18 is improved.

In particular, in the present embodiment, the film 18 is used as the hygroscopic member, but in general, when the film is used, the end portion thereof may be peeled off with the passage of years. Therefore, when the film 18 is attached to the passing portion 26, the end portion of the film 18 is peeled off over the years, the irradiation and reception of light by the camera sensor 20 are hindered by the peeled portion of the film 18, and the information in front of the vehicle is appropriately obtained. It may not be possible to obtain it. On the other hand, in the present embodiment, since the film 18 is not attached to the passing portion 26, even if the end portion of the film 18 is peeled off, it does not affect the acquisition of information in front of the vehicle.
In addition, when a film is used as a hygroscopic member, air bubbles may be generated between the film and the windshield or foreign matter may be mixed in when the film is attached to the windshield. Therefore, when the film 18 is attached to the passing portion 26, the irradiation and reception of light by the camera sensor 20 may be hindered by air bubbles or foreign matter, and information in front of the vehicle may not be properly acquired. On the other hand, in the present embodiment, since the film 18 is not attached to the passing portion 26, even if air bubbles are generated or foreign matter is mixed in the film 18, the acquisition of information in front of the vehicle is not affected at all.
Therefore, according to the configuration of the present embodiment, even if the film is used as the hygroscopic member, it is possible to appropriately acquire the information in front of the vehicle regardless of the passage of years.

Further, in the conventional external information acquisition device, since the film is attached to the area corresponding to the passing portion 26, the film can be visually recognized from the outside of the vehicle. Therefore, it is necessary to attach the film in consideration of the appearance from the outside, and there is a problem that it is difficult to improve the efficiency of the film attaching work. On the other hand, in the present embodiment, the films 18a to 18d are attached to the windshield 12 of the portion where the ceramic line 12b is printed. In addition, the ceramic line 12b is also printed on the windshield 12 at the portion where the film 18e and the film 18f face each other. That is, these films 18a to 18f are invisible from the outside of the vehicle. Therefore, according to the configuration of the present embodiment, the film 18 can be attached regardless of the appearance from the outside, so that the efficiency of the film attaching operation can be significantly improved.

Although the external information acquisition device 10 of the embodiment has been described above, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the object of the present invention.

For example, in the above embodiment, the film 18 is used as the hygroscopic member, but the form is not limited as long as it is a member capable of absorbing water vapor and / or moisture around the internal space Si. For example, a hygroscopic coating may be applied or silica gel may be placed. In addition, the surface of the hygroscopic member may be subjected to hydrophilic treatment or water repellent treatment.

Further, the film 18 may be attached to the windshield 12 (that is, the glass plate 12a) in the portion where the ceramic line 12b is not printed. In addition, the film 18 may be attached only to either the windshield 12 or the bracket 16.

Further, the film 18 may be attached to the camera sensor 20.

Further, in the above embodiment, the camera sensor 20 is used as a component of the information acquisition unit, but any device configured to acquire information outside the vehicle by irradiating or receiving light. The type of device does not matter. For example, a radar sensor, an optical beacon, or the like may be used. In addition, a type of camera sensor that does not irradiate light may be used as the camera sensor.

Further, in the above embodiment, the bracket 16 and the camera sensor 20 are exposed inside the vehicle, but the present invention is not limited to this configuration. For example, a cover is attached to the bracket 16 and the bracket 16 and the camera sensor 20 are attached by the cover. It may be covered so that the bracket 16 and the camera sensor 20 cannot be seen from inside the vehicle. In this case, the film 18 may be attached to the cover.

10: External information acquisition device, 12: Windshield, 12a: Glass plate, 12b: Ceramic line, 14: Surface, 16 (16a, 16b, 16c, 16d): Bracket, 18 (18a, 18b, 18c, 18d, 18e) , 18f): Film, 20: Camera sensor, 22: Irradiation part, 24: Light receiving part, 26: Passing part

Claims (1)

Windshield for vehicles and
It has a light receiving portion that is arranged so as to face the surface of the windshield on the vehicle interior side and receives light that passes through a passing portion that is a part of the windshield, and is external to the vehicle based on the light received by the light receiving portion. The information acquisition unit that acquires the information of
Hygroscopic members including hygroscopic materials and
With
At least a part of the outer surface of the information acquisition unit and a part of the surface of the windshield on the vehicle interior side are spaces in which the surface of the passage portion on the vehicle interior side and the light receiving portion are exposed and constitute the vehicle interior. In the external information acquisition device that constitutes the internal space partitioned from
The internal space is configured to communicate with the space constituting the passenger compartment through a slit-shaped gap.
The hygroscopic member, disposed through the and the passage section A site containing the pre SL between gap at a site other than the path of the light received in the light receiving unit,
External information acquisition device.

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