JP2003202369A - Radar apparatus for mobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To avoid degradation of performance for sensing an object by using a radar apparatus and moderate restrictions of design of a cover for covering a front face of the radar apparatus at the minimum when the radar apparatus is attached to a mobile. <P>SOLUTION: A casing 32 is integrally attached to a back of an emblem E provided in the center of a front grille of a vehicle. The radar apparatus Sr is accommodated in the casing 32. The emblem E is formed from a synthetic resin. A design part is metalized. Since the other ground transmits a radar beam from the radar apparatus Sr, the performance for sensing the object freely functions. Since the emblem E is integrated into the casing 32 and a distance with the radar apparatus Sr is reduced, the emblem E can be miniaturized and restrictions of design of the emblem E can be moderated at the minimum. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radar for a mobile body, which is provided with transmitting means for transmitting an electromagnetic wave, receiving means for receiving the electromagnetic wave reflected by an object, and a casing containing the transmitting means and the receiving means. Regarding the device.

[0002]

2. Description of the Related Art When a radar device is disposed behind an emblem provided in the center of a front grill of a vehicle, the emblem is made of a material that transmits electromagnetic waves transmitted and received by the radar device. 495
No. 22 is known.

By the way, in order to maximize the performance of the vehicle radar device, it is necessary to determine the mounting position on the vehicle body in consideration of the following conditions. ． The center line of the vehicle body is good so that the left and right detection areas of the radar device are even with respect to the traveling direction of the vehicle. ． In order to correspond to the pitching of the vehicle body, the position of the reflector of the preceding vehicle, the shape of the body of the preceding vehicle, etc., the height of the radar device is the same as that of the headlights, that is, the height of the front grill. ． The height of the radar device should be high in order to reduce the influence of hoisting and chipping of the preceding vehicle.

Furthermore, when mounting the radar device on the vehicle body, it is necessary to satisfy the following conditions. ． In order to adjust the axis of the radar device vertically and horizontally, it is necessary to support the radar device to the vehicle body through a bracket whose mounting angle can be changed, and secure space for adjusting the mounting angle of the radar device. There is a need. ． In order to secure the performance of the radar device, it is necessary not to place an obstacle in an area where electromagnetic waves pass, or to uniformly cover the area with a material that transmits electromagnetic waves.

Under the above conditions, the proper mounting position of the radar device is the central position of the front grille. Therefore, conventionally, the emblem is moved from the front grille to the hood, and the radar device is arranged in an empty space.
As described in Japanese Patent Laid-Open No. 2000-49522, an emblem made of a material that evenly transmits electromagnetic waves is arranged on the front grill, and a radar device is arranged behind the emblem.

[0006]

However, in the above-mentioned conventional method, since the radar device is provided behind the front grill through the space for adjusting the mounting angle, the emblem is placed on the hood from the front grill. If the shield is removed from the path through which the electromagnetic waves pass, there is a problem that the opening of the front grill becomes too large to allow the electromagnetic waves to pass therethrough and the radar device can be seen through the opening. Also, when the radar device is placed behind the emblem that transmits electromagnetic waves on the front grille, there is a problem that the emblem becomes too large to cover the area where electromagnetic waves pass. The restrictions of will increase.

The present invention has been made in view of the above-mentioned circumstances, and when mounting the radar device on a moving body, avoiding deterioration of the detection performance of the object by the radar device,
The objective is to minimize the design restrictions of the cover that covers the front of the radar device.

[0008]

In order to achieve the above object, according to the invention described in claim 1, a transmitting means for transmitting an electromagnetic wave, a receiving means for receiving an electromagnetic wave reflected by an object, The casing through which the electromagnetic wave passes, comprising a casing containing the transmitting means and the receiving means, and a plate-shaped resin or glass covering body that is located in the passage path of the electromagnetic wave and has a design visible from the outside. A mobile radar device is proposed, characterized in that at least a part of the cover is formed of the cover, or the cover is attached to the surface of the casing through which electromagnetic waves pass.

According to the above construction, of the casing containing the transmitting means and the receiving means, at least a portion through which electromagnetic waves pass is constituted by a plate-shaped resin or glass covering having a design visually recognizable from the outside. Or, by attaching the cover to the portion through which the electromagnetic wave passes, even if the radar device is placed behind the cover, the function can be exerted without any trouble, and the cover is integrated with the casing. By reducing the distance from the transmitting means and the receiving means to the cover, the cover can be downsized. In this way, the function of the radar device can be exerted without hindrance even if the cover body is downsized, and thus the restriction on the design of the cover body of the radar device can be minimized.

According to the invention described in claim 2,
In addition to the configuration of claim 1, there is proposed a radar apparatus for a mobile body, wherein the transmitting means is arranged in the casing such that an electromagnetic wave passes through a portion of the cover having a uniform thickness. It

According to the above structure, since the electromagnetic wave transmitted from the transmitting means passes through the portion of the covering having a uniform thickness,
The detection performance of the radar device can be ensured by minimizing the influence of the coating on the electromagnetic waves.

According to the invention described in claim 3,
In addition to the configuration according to claim 1, there is proposed a radar apparatus for a mobile body, wherein the receiving means is arranged in the casing so that an electromagnetic wave passes through a portion of the cover having a uniform thickness. It

According to the above structure, the electromagnetic wave received by the receiving means passes through the portion of the cover having a uniform thickness, so that the influence of the cover on the electromagnetic wave is minimized and the detection performance of the radar device is improved. Can be secured.

According to the invention described in claim 4,
In addition to the structure of claim 1, there is proposed a radar apparatus for a mobile body, wherein the transmitting means is capable of axis adjustment.

According to the above arrangement, since the axis of the transmitting means can be adjusted, it is possible to reliably detect the object by compensating for an error in the angle at which the radar device is attached to the moving body.

According to the invention described in claim 5,
In addition to the configuration of claim 1, the transmitting means is arranged in the casing so as to transmit an electromagnetic wave through a portion of a ground portion other than a design portion of the covering body. A radar device is proposed.

According to the above construction, the electromagnetic wave from the transmitting means is transmitted by passing through the ground portion other than the design portion of the covering body, so that the design portion of the covering body does not need to transmit the electromagnetic wave, and the covering body is eliminated. The structural constraint of can be relaxed.

According to the invention described in claim 6,
In addition to the configuration of claim 1, the receiving means is arranged in the casing so as to receive an electromagnetic wave that has passed through a ground portion other than a design portion of the covering body. A device is proposed.

According to the above construction, the electromagnetic wave to the receiving means is received by passing through the ground portion other than the design portion of the covering body, so that the design portion of the covering body does not need to transmit the electromagnetic wave and the covering body is eliminated. The structural constraint of can be relaxed.

According to the invention described in claim 7,
In addition to the configuration of claim 1, a radar device for a mobile object is proposed, wherein the design is made of a metal coating.

According to the above construction, the design of the covering body is made of a metal coating, so that the design can be emphasized.

According to the invention described in claim 8,
In addition to the configuration of claim 1, the design has a shape that divides a portion of the cover that is visible from the outside into a plurality of portions, and the transmitting unit includes a portion of the cover that is visible in the plurality of portions. A mobile radar device is proposed, which is arranged in a casing behind a portion near the center.

According to the above structure, the portion visible from the outside of the cover is divided into a plurality of portions by design, and the transmitting means is provided in the casing behind the portion near the center of the plurality of divided portions. By arranging, the transmitting means can be arranged in the center part of the design as much as possible to reliably detect the object.

According to the invention described in claim 9,
In addition to the configuration of claim 1, the design has a shape that divides a portion of the cover that is visible from the outside into a plurality of portions, and the receiving unit has a wide area among the plurality of portions. A mobile radar device is proposed, which is arranged in a casing behind the vehicle.

According to the above construction, the portion visible from the outside of the cover is divided into a plurality of portions by design, and the receiving means is provided in the casing behind the portion having a large area among the plurality of divided portions. By arranging, the area of the passage of the electromagnetic wave reflected by the object can be sufficiently secured and the function of the receiving means can be maximized.

According to the invention described in claim 10, in addition to the configuration of any one of claims 1 to 9,
A radar apparatus for a moving body is proposed, wherein the moving body is a vehicle having a front grill, and the covering body is an emblem attached to the center of the front grill in the vehicle width direction.

According to the above construction, the radar device is arranged behind the emblem attached to the center of the front grill of the vehicle in the vehicle width direction, so that the emblem is prevented from becoming unnecessarily large and the radar from the gap of the emblem. The function of the radar device can be exhibited without any hindrance while preventing the device from being seen and enhancing the aesthetic appearance.

The light transmitting section 1 and the light transmitting scanning section 2 of the embodiment
Corresponds to the transmitting means of the present invention, the light receiving section 3 of the embodiment corresponds to the receiving means of the present invention, the emblem E of the embodiment corresponds to the covering of the present invention, and the vehicle V of the embodiment corresponds to the vehicle V of the present invention. Corresponds to the moving body.

[0029]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below based on the embodiments of the present invention shown in the accompanying drawings.

1 to 7 show a first embodiment of the present invention. FIG. 1 is an overall perspective view of a vehicle equipped with a radar device, FIG. 2 is a block diagram of the radar device, and FIG. 3 is a radar device. 1 is a perspective view, FIG. 4 is an enlarged view in the four directions of FIG. 1, FIG. 5 is a sectional view taken along line 5-5 of FIG. 4, FIG. 6 is a sectional view taken along line 6-6 of FIG.
FIG. 7 is an exploded vertical sectional view of the emblem.

As shown in FIG. 1, an emblem E is provided at the center of a front grill G provided in front of the vehicle V. On the rear surface of this emblem E, a radar device using a laser beam described later is provided. It is provided integrally.

As shown in FIGS. 2 and 3, a radar device S for detecting the distance and direction of an object in front of the vehicle.
r is composed of a light sending unit 1, a light sending scanning unit 2, a light receiving unit 3, and a distance measurement processing unit 5. The light transmitting unit 1 includes a laser diode 11 that integrally includes a light transmitting lens, and a laser diode drive circuit 12 that drives the laser diode 11. The light transmission scanning unit 2 includes a light transmission mirror 13 that reflects the laser beam output from the laser diode 11, a motor 15 that reciprocally rotates the light transmission mirror 13 about a vertical axis 14, and a motor that controls the driving of the motor 15. And a drive circuit 16. The light-transmitting beam emitted from the light-transmitting mirror 13 has a vertically long and narrow pattern with a limited horizontal width, which reciprocates in the left-right direction at a predetermined cycle to scan an object.

The light receiving section 3 includes a light receiving lens 17, a photodiode 18 which receives a reflected wave converged by the light receiving lens 17 and converts it into an electric signal, and a light receiving amplifier circuit 19 which amplifies an output signal of the photodiode 18. Prepare

The distance measurement processing unit 5 has a control circuit 24 for controlling the laser diode drive circuit 12 and the motor drive circuit 16, a communication circuit 26 for communication between the ACC system and the Stop & Go system, and a laser beam transmission. Counter circuit 2 that counts the time from light to light reception
7 and a central processing unit 28 for calculating the distance to the object and the direction of the object.

The laser beam transmitted and received by the radar device Sr is a near-infrared ray having a wavelength of 850 to 900 nm, and an instantaneous detection area having a horizontal angle of 1 ° and a vertical angle of 3 ° has a horizontal angle of 16 °. Scanning is performed in the left-right direction in the range where the vertical angle is 3 °. In order to match the axis of the radar device Sr with the correct direction of the detection axis, the laser beam with a vertical angle of 3 ° can be adjusted in the vertical direction within the range of 10 °, and the horizontal angle of 16 ° can be detected. In the area, the horizontal axis can be adjusted within a horizontal angle range of 23 °. The reception area has a horizontal angle of 10 ° and a vertical angle of 2
It has a width that covers a range of 3 °. Then,
The distance to the object is detected based on the time from when the light-transmitting beam is sent to when the reflected wave reflected by the object is received, and the instantaneous direction of the detection area at that time The direction of the object is detected based on the.

Next, the structure of the emblem E provided at the center of the front grill G and the structure of the radar device Sr integrally provided on the rear surface of the emblem E will be described with reference to FIGS.

The emblem E made of synthetic resin is formed in the shape of a plate having a constant thickness which forms a substantially quadrangle with rounded four corners, and the four mounting brackets 31 ... It is bolted to the rear surface. A casing 32 having an open front surface is fixed to a rear surface of the emblem E, and a light transmitting unit 1 and a light transmitting scanning unit 2 including a laser diode 11, a motor 15, a light transmitting mirror 13 and the like are housed under the casing 32. The light receiving portion 3 including the light receiving lens 17, the photodiode 18 and the like is housed in the upper part thereof.

FIG. 7 shows the structure of the emblem E laminated in three layers. That is, the emblem E is, from the front surface side to the rear surface side, a surface transparent resin layer 33 made of polycarbonate (PC) that has a high laser beam transmittance and is not easily scratched, and a metal vapor deposition layer 34 in which a metal such as indium is vapor deposited.
And a backside colored resin layer 35 made of acrylonitrile-ethylene-propylene-styrene-copolymer (AES) or acrylonitrile-butadiene-ethylene (ABS) mixed with black particles that allow only a laser beam to pass therethrough. When viewed from the front of this emblem E, a design portion 36 in which the letter "H" is arranged inside the surrounding frame
Shines in silver color due to the metal vapor deposition layer 34, and its design portion 36
The background portion 37 becomes black, which is the color of the backside colored resin layer 35. Further, since the design portion 36 projects further forward than the base portion 37, the design portion 36 appears to be three-dimensionally raised in combination with the contrast of silver and black, and the design effect is enhanced.

The surface transparent resin layer 33 may be provided if necessary, and the material thereof is not limited to PC, and AES
And ABS can be adopted. Further, the color of the backside coloring resin layer 35 is not limited to black, and any color such as red, blue, yellow, and white can be adopted. When the color of the backside coloring resin layer 35 is other than black, a part of visible light is transmitted, but there is no problem because the photodiode 18 of the radar device Sr reacts only to near infrared rays.

As is apparent from FIGS. 4 and 6, the light-transmitting scanning section 2 of the radar device Sr is arranged so that the laser beam transmitted from the radar apparatus Sr passes through the area A1, and the light-receiving section 3 is disposed there. The laser beam received by the area A2
It is arranged to pass through. The areas A1 and A2 are located in the vehicle width direction lower center and the vehicle width direction center upper portion of the emblem E arranged in the vehicle width direction center of the front grill G, respectively, and both of them are located in the frame around the design portion 36 and "H". It is surrounded by the letters and. Although the laser beam cannot pass through the metal vapor deposition layer 34 of the emblem E, the laser beam can pass through the regions A1 and A2 where the metal vapor deposition layer 34 of the emblem E does not exist without any trouble by the above arrangement. Further, in the areas A1 and A2, the front transparent resin layer 33 and the backside colored resin layer 35 that form the emblem E have a uniform thickness, so that there is no fear that the laser beam passing therethrough will be unevenly refracted. .

Since the radar device Sr is integrally provided on the back surface of the emblem E and the laser beam is transmitted and received so as to pass through the emblem E, the radar device Sr is provided separately behind the emblem E. The emblem E can be downsized as compared with the case where a laser beam is transmitted and received through the opening of E. This is because the radar device Sr is integrally provided on the back surface of the emblem E, and the radar device Sr approaches the emblem E, so that the spread of the laser beam at the position where the emblem E is transmitted becomes small.

As a result, while ensuring the function of the radar device Sr, the problem that the emblem E becomes disproportionately large and the radar device Sr can be seen from the opening of the emblem E is solved, and the emblem E is designed. The above restrictions are greatly relaxed. Radar device S
The fact that r is invisible from the outside is not only preferable in appearance, but also useful for preventing theft of the radar device Sr.

Particularly, since the area A1 through which the transmitted light beam passes is arranged at the center of the emblem E in the left-right direction (that is, the center of the front grill G in the left-right direction), the radar device Sr is arranged at the center of the vehicle body in the left-right direction. The detection range can be secured. Further, since the area A2 through which the received light beam passes is arranged in the largest portion of the ground portion 37 of the emblem E, it is possible to secure a sufficient amount of received light beam and enhance the detection performance of the radar device Sr. it can.

Further, the radar device Sr can be arranged in the center of the front grill G, which is the optimum mounting position, while the emblem E is arranged in the center of the front grill G without moving it on the hood. It is possible to ensure the maximum Sr detection performance. Further, the emblem E can be shared by the vehicle V provided with the radar device Sr and the vehicle V not provided with the radar device Sr, and the cost can be reduced.

When the radar device Sr is attached to the vehicle V, aiming is required so that the direction of its axis coincides with the direction of a preset detection axis in order to correctly detect a target object such as a preceding vehicle. . Generally, aiming of the radar device Sr is performed by adjusting the mounting angle of the radar device casing with respect to the vehicle body.
In the case where the casing 32 of the radar device Sr is integrated with the emblem E as in the present embodiment, the angle of the emblem E may be changed by aiming and a gap may be created between the emblem E and the front grill G, which may impair the appearance. There is.

For the above reason, in this embodiment, it is necessary to perform aiming without changing the mounting angle of the casing 32 (mounting angle of the emblem E). In particular,
By changing the center position of the reciprocating rotation of the motor 15 in the left-right direction, the left-right angle can be set to 2 by setting the detection area of 16 °
By adjusting in the range of 3 ° and changing the vertical angle of the light transmitting mirror 13, the detection area having the vertical angle of 3 ° is adjusted in the vertical angle range of 10 ° (see FIG. 3). For details of this aiming, refer to Japanese Patent Application No.
No. 0-323644 is disclosed in detail.

Next, a second embodiment of the present invention will be described with reference to FIGS. 8 to 10 correspond to FIGS. 5 to 7 of the first embodiment, respectively.

While the radar device Sr of the first embodiment is a laser radar device, the radar device Sr of the second embodiment is a millimeter wave radar device, and the laser diode 11 and the light transmitting mirror 13 of the laser radar device are Instead, a transmission plane antenna 41 is provided, and a reception plane antenna 42 is provided instead of the light receiving lens 17 and the photodiode 18 of the laser radar device. The transmission plane antenna 41 is supported by the vertical shaft 14 that reciprocally rotates by a motor 15, and a millimeter wave transmitted from the transmission plane antenna 41 scans a predetermined detection area in the left-right direction, and reflected waves from an object are received by the reception plane antenna 42. Be received.

As is apparent from FIG. 10, the emblem E that covers the front surface of the casing 32 of the radar device Sr has a surface transparent resin layer 33 made of polycarbonate (PC) and a part thereof from the front surface side to the rear surface side. A missing black or any other color printing layer 43, a metal deposition layer 44 of indium covering the entire surface of the emblem E, and an acrylonitrile ethylene propylene styrene copolymer (AE).
S) and acrylonitrile butadiene ethylene (ABS)
And a back surface resin layer 45 of When this emblem E is viewed from the front, a part of the metal vapor deposition layer 44 exposed from the lacking portion of the printing layer 43 forming the ground portion 37 is a design portion in which the letter “H” is arranged inside the surrounding frame. 36 (see FIG. 4) is visible. At this time,
Since the back surface resin layer 45 is located on the back surface side of the metal vapor deposition layer 44 and is invisible, the color thereof is arbitrary.

Similar to the first embodiment shown in FIG. 4, the millimeter wave is transmitted through the area A1 at the lower portion in the vehicle width direction center of the emblem E arranged in the vehicle width direction center of the front grill G,
The millimeter wave is received through the area A2 at the upper center of the emblem E in the vehicle width direction. The metal vapor deposition layer 44 covering the entire surface of the emblem E can transmit millimeter waves without any problem, but the front surface transparent resin layer 33, the printing layer 43 and the back surface resin layer 45 are uniformly laminated in the areas A1 and A2. By arranging the emblem E on the ground portion 37, it is possible to prevent uneven refraction of millimeter waves and ensure the detection performance of the radar device Sr.

As in the first embodiment shown in FIG. 4, since the area A1 for transmitting the millimeter wave is arranged in the center of the emblem E in the left-right direction, the radar device Sr is arranged in the center of the body in the left-right direction and is appropriately detected. The range can be secured. In addition, the area A2 that receives the millimeter wave is the area 37 of the ground of the emblem E.
Since it is arranged in the portion having the largest area, it is possible to secure a sufficient amount of millimeter waves to be received and enhance the detection performance of the radar device Sr.

Next, a third embodiment of the present invention will be described with reference to FIGS.

The radar apparatus Sr of the third embodiment is also a millimeter wave radar apparatus, and has a single plane antenna 46 having the functions of both a plane transmitting antenna and a plane receiving antenna. Of the plane antenna 46, all the portions located behind the areas A1 to A3 arranged in the ground portion 37 of the emblem E constitute a transmitting / receiving antenna. In this way, by using the entire ground portion 37 of the emblem E for transmitting and receiving millimeter waves, it is possible to improve the detection performance of the radar device Sr while reducing the size of the emblem E.

As shown in FIG. 14, the millimeter wave radar apparatus Sr using the FM-CW wave has an oscillator 4 based on a timing signal input from the timing signal generation circuit 47.
The transmission operation of 9 is modulated and controlled by the FM modulation control circuit 48, and the transmission wave whose frequency is modulated in a triangular wave form is transmitted from the plane antenna 46 through the amplifier 50 and the circulator 51 as shown by the solid line in FIG. , Toward a different direction horizontally in a predetermined detection range in front of the vehicle, for example, 9
It is sent in separate channels. When the plane antenna 46 receives a reflected wave in which the FM-CW wave is reflected by an object such as a preceding vehicle, the received wave is shown in FIG. 15 (a) when the object approaches the own vehicle. ), As indicated by the broken line
On the rising side where the frequency of the transmitted wave increases linearly, it appears later than the transmitted wave at a frequency lower than the transmitted wave, and on the falling side where the frequency of the transmitted wave decreases linearly, it transmits at a higher frequency than the transmitted wave. Appears later than the waves.

The received wave received by the plane antenna 46 is input to the mixer 52 via the circulator 51. In addition to the received wave from the circulator 51, the traveling wave distributed from the transmitted wave output from the oscillator 49 is input to the mixer 52 via the amplifier 53, and the mixer 52 mixes the transmitted wave and the received wave. By doing so, FIG. 15 (b)
As shown in, a beat signal having a peak frequency Fup on the rising side where the frequency of the transmission wave linearly increases and a peak frequency Fdn on the falling side where the frequency of the transmission wave linearly decreases is generated.

The beat signal obtained by the mixer 52 is amplified by the amplifier 54 to an amplitude of a required level, and A / D converted by the A / D converter 55 at each sampling time.
The digitized amplified data is stored and held in the memory 56 in time series. A timing signal is input to the memory 56 from the timing signal generation circuit 47, and the memory 56 stores data according to the timing signal for each of the rising side where the frequency of the transmitted / received wave increases and the falling side where the frequency decreases. Will be held in memory.

Based on the data stored in the memory 56, the central processing unit (CPU) 57 determines the peak frequency Fu.
Based on p and Fdn, the distance to the object and the relative velocity are calculated by a known method, and A is calculated as in the first embodiment.
It communicates with an electronic control unit ECU such as a CC system or a Stop & Go system.

In the third embodiment, since the planar antenna 46 is fixed and mechanical aiming cannot be performed, an object existing in the traveling direction of the vehicle is the detection area within the entire scanning range of millimeter waves. It is necessary to perform electrical aiming to set the detection area so as to come to the center. The details of this aiming are disclosed in detail in Japanese Patent Laid-Open No. 9-178856, which is the application of the present applicant.

FIG. 16 shows a modification of the third embodiment.

When the emblem E of this modified example is viewed from the front, a metallic design portion 36 in which the character "A" is arranged is arranged inside the surrounding frame, and the background of the design portion 36 is a black background. The portion 37 is arranged. Areas A1, A2 and A2 arranged in the ground portion 37 of the emblem E correspond to millimeter wave transmission / reception areas.

In the third embodiment and its modification, the areas A1 to A3 for transmission / reception are divided into a plurality of areas, but the effect is within the error range, so there is no problem. Even if the area for transmission is somewhat narrow, there is no problem if the transmission power is increased, but the area for reception greatly affects the performance of the radar device Sr, so it is desirable to secure the area as wide as possible.

As described above, according to the second embodiment, the third embodiment and the modifications thereof, the same operational effect as the first embodiment can be obtained.

Although the embodiments of the present invention have been described in detail above, the present invention can be modified in various ways without departing from the scope of the invention.

For example, in the embodiment, the emblem E covers the front opening of the casing 32 and constitutes a part of the casing 32. However, the emblem E may be attached to the front surface of the casing 32 that transmits electromagnetic waves.

Further, the kind of the synthetic resin constituting the emblem E is not limited to the embodiment, and glass may be used in place of the synthetic resin.

Instead of depositing metal on the design portion 36 of the emblem E, metal plating or metal foil sticking can be applied. The metal used at that time is not limited to indium.

The moving body of the present invention is not limited to the vehicle V.

[0068]

As described above, according to the invention as set forth in claim 1, of the casing containing the transmitting means and the receiving means, at least a portion through which an electromagnetic wave passes is a plate shape having a design in which it can be visually recognized from the outside. Of the resin or glass, or by attaching the cover to a portion through which the electromagnetic wave passes, the radar device can perform its function even if it is arranged behind the cover. In addition, the cover can be miniaturized by integrating the cover with the casing to reduce the distance from the transmitting means and the receiving means to the cover. In this way, the function of the radar device can be exerted without hindrance even if the cover body is downsized, and thus the restriction on the design of the cover body of the radar device can be minimized.

According to the invention described in claim 2,
Since the electromagnetic wave transmitted from the transmitting means passes through the portion where the thickness of the covering is uniform, it is possible to minimize the influence of the covering on the electromagnetic wave and ensure the detection performance of the radar device.

According to the invention described in claim 3,
Since the electromagnetic wave received by the receiving means passes through the portion where the thickness of the covering is uniform, it is possible to minimize the influence of the covering on the electromagnetic wave and ensure the detection performance of the radar device.

According to the invention described in claim 4,
Since the axis of the transmitting means can be adjusted, it is possible to reliably detect the object by compensating for an error in the angle at which the radar device is attached to the moving body.

According to the invention described in claim 5,
Since the electromagnetic wave from the transmitting means is transmitted by passing through the ground part other than the design part of the cover, the design part of the cover does not need to transmit the electromagnetic wave, and the structural constraint of the cover is relaxed. You can

According to the invention described in claim 6,
Since the electromagnetic wave to the receiving means is received by passing through the ground portion other than the design portion of the cover, it is not necessary for the design portion of the cover to transmit the electromagnetic wave, and the structural constraint of the cover is relaxed. You can

According to the invention described in claim 7,
Since the design of the covering body is made of a metal coating, the design can be emphasized.

According to the invention described in claim 8,
A part visible from the outside of the cover is divided into a plurality of parts by design, and the transmitting means is arranged in the casing behind the part close to the center among the plurality of divided parts. The object can be reliably detected by arranging it in the central portion of the design.

According to the invention described in claim 9,
A part of the cover that can be seen from the outside is partitioned by design, and the receiving means is arranged in the casing behind the part of the plurality of parts having a large area. Further, the area of the passage of the electromagnetic wave can be sufficiently secured to maximize the function of the receiving means.

According to the tenth aspect of the invention, since the radar device is arranged behind the emblem attached to the center of the front grill of the vehicle in the vehicle width direction, the emblem is prevented from becoming unnecessarily large. In addition, it is possible to prevent the radar device from being seen through the gap of the emblem and enhance the aesthetic appearance, and to make the function of the radar device be exhibited without any hindrance.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a vehicle equipped with a radar device.

FIG. 2 is a block diagram of a radar device.

FIG. 3 is a perspective view of a radar device.

FIG. 4 is an enlarged view in the four directions of FIG.

5 is a sectional view taken along line 5-5 of FIG.

6 is a sectional view taken along line 6-6 of FIG.

FIG. 7 is an exploded vertical sectional view of the emblem.

FIG. 8 is a diagram corresponding to the above 5 according to the second embodiment of the present invention.

FIG. 9 is a diagram corresponding to 6 according to the second embodiment of the present invention.

FIG. 10 is a diagram corresponding to 7 according to the second embodiment of the present invention.

FIG. 11 is a diagram corresponding to the above-mentioned 4 according to the third embodiment of the present invention.

12 is a sectional view taken along line 12-12 of FIG.

13 is a sectional view taken along line 13-13 of FIG.

FIG. 14 is a block diagram of a millimeter wave radar device.

FIG. 15 is a graph showing waveforms and peak frequencies of transmitted / received waves when an object is moving toward the transmitting / receiving antenna.

FIG. 16 is a diagram corresponding to the above-mentioned 4 according to a modification of the third embodiment.

[Explanation of symbols]

1 Light transmitter (transmitting means) 2 Light emission scanning unit (transmission means) 3 Light receiving part (reception means) 32 casing 36 Design part 37 part of the ground E emblem (cover) Sr radar device V vehicle

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Seiji Shinnai             1-4-1 Chuo Stock Market, Wako City, Saitama Prefecture             Inside Honda Research Laboratory F term (reference) 5J070 AA14 AB24 AC02 AE01 AF03                       AK40                 5J084 AA05 AA10 AB01 AC02 AD01                       BA04 BA11 BA19 BA36 BA49                       BB01 BB21 DA01 EA22

Claims (10)

[Claims] 1. Transmitting means (1, 2) for transmitting electromagnetic waves
A receiving means (3) for receiving the electromagnetic wave reflected by the object, a casing (32) containing the transmitting means (1, 2) and the receiving means (3), and being located in the passage of the electromagnetic wave. Is a plate-shaped resin or glass coating (E) having a design visible from the outside, and at least a part of the casing (32) through which electromagnetic waves pass is formed of the coating (E)? Alternatively, the covering device (E) is attached to the surface of the casing (32) through which electromagnetic waves pass, the radar device for a moving body. 2. The transmitting means (1, 2) is arranged in the casing (32) so that electromagnetic waves pass through a portion of the covering (E) having a uniform thickness, The radar device for a mobile body according to claim 1. 3. The receiving means (3) is arranged in the casing (32) such that electromagnetic waves pass through a portion of the covering (E) having a uniform thickness. 1. The radar device for a mobile body according to 1. 4. The radar apparatus for a mobile body according to claim 1, wherein the transmitting means (1, 2) is capable of axis adjustment. 5. The casing (32) so that the transmitting means (1, 2) transmits an electromagnetic wave through a ground portion (37) other than a design portion (36) of the covering body (E).
The radar device for a mobile body according to claim 1, wherein the radar device for a mobile body is arranged inside. 6. The casing (32) so that the receiving means (3) receives an electromagnetic wave that has passed through a ground portion (37) other than a design portion (36) of the covering body (E).
The radar device for a mobile body according to claim 1, wherein the radar device for a mobile body is arranged inside. 7. The radar apparatus for a mobile body according to claim 1, wherein the design is made of a metal coating. 8. The design has a shape that divides a portion visible from the outside of the covering (E) into a plurality of portions, and the transmitting means (1, 2) includes a portion of the plurality of portions.
The radar device for a mobile body according to claim 1, wherein the covering device (E) is arranged in a casing (32) at the rear of a portion close to the center of the covering body (E). 9. The design has a shape that divides a portion visible from the outside of the covering (E) into a plurality of portions, and the receiving means (3) has an area of the plurality of divided portions. The radar device for a mobile body according to claim 1, wherein the radar device is arranged in a casing (32) behind a wide portion. 10. The vehicle (V) is a vehicle having a front grill (G), and the cover (E) is an emblem attached to the center of the front grill (G) in the vehicle width direction. The radar apparatus for a mobile body according to any one of claims 1 to 9.