JPH10126129A - Attachment bracket for on-vehicle radar - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the attachment of an on-vehicle radar without giving any additional machining to a vehicle by attaching a bracket to the vehicle, together with a number plate through the clamping of the number plate attachment bolts. SOLUTION: A bracket 1 consists of an antenna unit holding part and its attachment part for vehicle. The antenna unit holding part includes a holding plate which holds an antenna unit 2 between both side faces to fix it and attachment holes. Then the unit 2 is mounted and fixed by attachment bolts 5 through the attachment holes. The attachment part for vehicle has its attachment holes at positions corresponding to the number plate attachment bolt holes of a vehicle bumper 4 and is attached to the bumper 4 through the attachment holes, together with a number plate 3 through the clamping of bolts 6. These attachment holes are formed as slits, etc., and accordingly fine adjustment for attachment is possible.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a mounting bracket for a vehicle-mounted radar.

[0002]

2. Description of the Related Art Japanese Unexamined Patent Publication No. 7-225277 proposes a mounting bracket capable of finely adjusting the optical axis of a laser radar. In addition, Japanese Patent Application Laid-Open No. Hei 6-232619 proposes a method in which a number plate capable of transmitting radio waves is assumed, and the antenna itself is attached to the back surface thereof.

[0003]

The above prior art has the following problems.

[0004] As a first problem, when a radar antenna unit is retrofitted to a commercial vehicle, additional processing is required for a bumper or the like of the vehicle. For this reason, it is difficult for the general user to easily perform the installation, and it is necessary for the trained worker to perform an installation operation at a dealer. Naturally, in this case, a separate installation cost is incurred, which increases the user's cost burden.

As a second problem, a radar used for measuring a relative speed, a distance, and the like with respect to a preceding vehicle needs to be installed at an appropriate fixed height at an antenna unit mounting position. is there. However, assuming bumper mounting, it can be used commonly for various types of vehicles with different vehicle heights, and a support method that always installs the antenna surface of the radar unit in the desired height range for performance,
Not yet proposed.

The height of the mounting position will be described with reference to FIG. If the mounting position of the antenna unit is too high, the object (vehicle) 30 immediately in front of the own vehicle 31 does not enter the radar beam irradiation range 32 spread from the antenna unit as shown in FIG. Conversely, if the mounting position is too low, the radar beam 32 is reflected on the ground 33 as shown in FIG. For this reason, it is necessary to mount the antenna unit in an appropriate mounting height range from the viewpoint of the performance of the radar, but the bumper height differs between a large truck and a small truck. For example, when the vehicle to be mounted is a truck, the height from the ground at the center of the bumper is about 40 cm for a 2-ton car class, about 60 cm for a 40-ton car class, and about 80 cm for a 10-ton car class.
On the other hand, the mounting height of the appropriate antenna unit is 40cm
Assuming that the distance is 60 cm to 60 cm, it is preferable to attach the antenna unit to the upper end of the bumper in the 2-ton class and the lower end of the bumper in the 4-ton and 10-ton class.

Next, the radar beam is swung right and left to transmit and receive and scan, or a wide beam is transmitted and received by a plurality of antennas, so that the relative speed and distance of the forward object are obtained. Consider the case where angle detection is performed in combination with the above. In such a case, it is desirable to mount the antenna unit at the center of the vehicle so that the same range can be detected in the left and right sides. Therefore, the best antenna unit mounting position is the upper or lower end of the bumper and the number plate position which is the center position of the vehicle. However, the challenge is to devise a mounting method that can be shared by all types of vehicles.

As a third problem, there is no mounting mechanism for finely adjusting the axis of a beam transmitted / received from the antenna surface of the radar unit, or it is complicated and expensive.

An object of the present invention is to provide a function of adjusting the mounting height of an analog / analog surface for each type of vehicle and a simple function of adjusting a transmission / reception beam axis from an antenna surface, and to easily mount the vehicle without requiring any additional processing. It is an object of the present invention to provide a mounting bracket for an antenna unit of an in-vehicle radar capable of performing the above.

[0010]

According to the first aspect of the present invention, there is provided a vehicle-mounted radar system in which an antenna unit is mounted on a front surface of a vehicle, and a structure for holding the antenna unit. The bolt holes for the vehicle number plate mounting bolts have a structure that can be attached to the vehicle by fastening together with the number plate, and the antenna unit can be arranged either above or below the number plate. It is characterized by having.

In the second invention, the mounting bracket has a plurality of bolt holes corresponding to the number plate bolt hole positions at the number plate position of the vehicle corresponding to each vehicle standard. Is characterized in that it is a slot-shaped pattern in which the bolt tightening position is movable in the vertical direction of the number plate.

Further, in the third invention, the structure for holding the antenna unit of the radar of the mounting bracket includes:
At least one bolt hole is provided on both side surfaces of the antenna unit, and the bolt hole provided at the mounting position of the corresponding bracket has an elongated hole shape in which the bolt tightening position is movable in the front-rear direction with the number plate. It is characterized by being a pattern.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. The present invention mainly relates to a structure of a radar unit mounting bracket that always realizes optimum mounting regardless of a type of vehicle mounted on a vehicle. FIG. 1A is a front view of the mounting bracket, and FIG. 1B is a side view. The bracket is composed of two parts, a holding part 1b for the antenna unit and a mounting part 1a for mounting on the vehicle. The antenna unit holding portion 1b has a hole 1c for holding and fixing the antenna unit from both side surfaces of the antenna unit. The antenna unit has two on each side
There are screw holes perpendicular to the surface and the surface, and bolts are tightened with the screw holes of the antenna unit through the holes 1c to fix the antenna unit to the bracket. As described below,
The hole 1c is a long hole so that the vertical angle of the antenna unit can be adjusted.

The mounting portion 1a of the bracket to the vehicle is
The plate-shaped structure has a hole 1d corresponding to a mounting bolt of a number plate at a position where the number plate is mounted on the vehicle bumper so that the hole can be fixed together with the number plate. In the figure, the antenna unit holding portion 1b is located below the number plate. However, the antenna unit holding portion 1b can be turned upside down so as to come over the mounting portion 1a to the vehicle. This allows
Subscripts and superscripts can be selected and attached. The hole 1d is different in the size and the position of the number plate between the large car and the ordinary car. Therefore, two kinds of holes, a large car hole and an ordinary car hole, are prepared. As will be described later, the hole 1d is a hole long in the height direction so that the height can be finely adjusted.

Next, FIG. 2 shows a mounting form using this bracket. The mounting form in FIG. 2 is a case where the antenna unit is mounted on a lower part of a vehicle bumper. The antenna unit 2 is fixed to the bracket 1 with bolts 5.
Next, the bracket 1 with the antenna unit 2 is shown in FIG.
As shown in the above, the number plate 3 and the bolt 6 are fastened together at the number plate mounting position of the vehicle bumper 4. At this time, by attaching a thin elastic material with a high coefficient of friction to both surfaces of the number plate contact surface of the bracket and the contact surface with the vehicle,
It is also possible to prevent the fixed bracket from shifting due to vibration during traveling.

FIG. 4 shows the manner in which the antenna unit is mounted using the bracket of the present invention. FIG.
(A) is attached so that the antenna unit is located below the vehicle bumper, and (b) is attached so that it is located below the vehicle bumper. FIG.
(B) can be easily realized by mounting the bracket 1 upside down on the number plate mounting position of the vehicle bumper as described above.

Next, a method of finely adjusting the height of the antenna unit when attaching the bracket to the vehicle will be described with reference to FIG. The number plate 3 and the bracket 1 are fixed to the number plate mounting position by bolts 6 for fixing the number plate. At this time, the mounting height of the antenna is finely adjusted by the position of the bolt 6 in the hole 1d of the bracket. . As a reason for performing the fine adjustment, as shown in FIG. 3, the portion of the bracket 1 to which the antenna unit 2 is attached is brought into contact with the upper or lower end of the bumper 4 to stabilize the antenna unit 2.

Furthermore, effective vibration isolation from the vehicle can be achieved by a method of contacting the gap 10 between the contact surface of the bracket 2 and the bumper 4 with a thin elastic material interposed therebetween. Fixing only at the number plate position results in a cantilever structure, so that when large vibrations are transmitted from the vehicle to the antenna unit, there is a risk that the beam axis of the antenna unit will vibrate significantly. In this case, correct measurement of the target becomes impossible due to the beam swing. In order to cope with such a problem, the above-mentioned height fine adjustment structure is considered, and a structure that can be brought into contact with and adhered to the bumper is provided.

Next, a mechanism for adjusting the vertical angle of the antenna unit will be described with reference to FIG. Bracket 1
After the antenna unit 2 is fixed to the vehicle by sandwiching the antenna unit with the number plate 3, the vertical angle of the radar beam axis is adjusted. At this time, if the radar transmission / reception antenna surface faces downward or upward, it becomes impossible to irradiate the object in front at a correct angle, and thus the antenna unit needs to be adjusted vertically. As mentioned above, there are two places on each side of the antenna unit,
There are a total of four mounting screw holes. On the other hand, on two surfaces of the bracket 1 that are in contact with the side surfaces of the antenna unit, a total of four long holes 1c are provided at positions corresponding to the mounting screw holes of the antenna unit 2. The antenna unit is fixed to the bracket by tightening the bolt 5 with the screw hole of the antenna unit through the hole 1c of the bracket. At this time, the vertical angle of the antenna unit can be adjusted by the position of the bolt 5 in the elongated hole 1c.

In the embodiment shown in FIG. 6, when the radar beam transmitting / receiving surface of the antenna unit faces upward, the position of the bolt 5 in the hole 1c of the upper bracket is set to the vehicle side.
The position of the bolt 5 in the hole 1c of the lower bracket is adjusted by approaching the position in the traveling direction. Conversely, when the radar beam transmitting / receiving surface of the antenna unit is turned downward, the position of the bolt 5 in the hole 2c of the upper bracket is set to the traveling direction side, and the position of the bolt 5 in the hole 1c of the lower bracket is set to the vehicle side. And adjust it.

FIG. 9 shows a case where a long hole in the shape of an arc is used instead of the hole which is long linearly in the horizontal direction in FIG. In this case, the rotation angle may be adjusted using the lower hole 42 as a rotation axis, and the upper hole 41 may be fixed at an appropriate position according to the angle adjustment.
Inexpensive and stepless adjustment is possible.

Next, referring to FIG.
Next, the fixture 22 for the signal line 21 will be described. From the back of the antenna unit, there is a signal line that couples to a unit that processes signals from the antenna unit 2 or a unit that gives information to the driver. In the case of the bracket shape of the embodiment of FIG. 1, a hole for passing the signal line 21 from the antenna unit 2 is formed from the bracket position corresponding to the rear position of the antenna unit. A U-shaped bracket 22 is screwed to the bracket on the surface of the portion opposite to the antenna unit, and the signal line 21 is fixed between the bracket 22 and the bracket 1. Thus, even if the bolt 5 supporting the antenna unit 2 comes off, the antenna unit 2 can be prevented from dropping. In addition, even if the signal line 21 is pulled by some influence, the connector portion 2 of the signal line 21 with the antenna unit 2 is pulled.
No force is applied to the connector 20 and damage to the connector 20 can be prevented.

FIG. 4 shows another embodiment of the bracket according to the present invention. The bracket 50 in FIG. 10 is for mounting the antenna unit 2 above and below the number plate as in FIG. However, the antenna unit 2 is held from above or below, not from behind.

FIG. 11 shows another structure which can be mounted by utilizing the number plate mounting position. The antenna 2 is attached to the number plate position, and the number plate 3 is attached to the left or right thereof. The bracket is composed of 51 and 52 plate materials. 52,
There is a structure for fixing the antenna unit 2 and a hole for passing a bolt, which is aligned with a bolt position for mounting a number plate, to mount the antenna unit 2 at a position where the number plate is mounted on the bumper. 51 has a hole through which a bolt passes for attaching a number plate. Between 51 and 52, insert several washers and connect them with bolts. Thus, even when the bumper is bent at the number plate mounting position of the vehicle, it is possible to mount the bracket corresponding to the depth of the dent.

Although the present invention is especially for a vehicle-mounted radar, it is also possible to mount a vehicle-mounted sensor, such as a camera or an ultrasonic sensor, which needs to be mounted at the upper end, the lower end, or the center of the van. Two cameras can be attached to the upper end of the bumper in the left and right directions as confirmation sensors when entering a road where the left and right views are blocked. Further, a camera can be attached to the lower end of the bumper toward the vehicle as an obstacle check under the vehicle.

[0026]

According to the present invention, in an on-vehicle radar system,
The antenna unit can be mounted in an appropriate mounting height range from the performance of the radar in any vehicle model. Further, the mounting is easy because no additional processing is required, and the mounting can be easily performed by the user himself. Also,
In order to align the axes of the beams transmitted and received from the radar, no adjustment is required in the left-right direction because the number plate mounting surface is horizontal in front of the vehicle, and adjustment in the up-down direction can be easily performed with a screw. Since it has a simple structure, there is an advantage that costs can be reduced.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of an embodiment.

FIG. 2 is an explanatory view of a mounting form of the embodiment.

FIG. 3 is a cross-sectional view of the embodiment.

FIG. 4 is an explanatory view of a mounting example of the embodiment.

FIG. 5 is an explanatory view of fine adjustment of a mounting height.

FIG. 6 is an explanatory diagram of the vertical angle adjustment of the antenna unit.

FIG. 7 is an explanatory diagram of signal line fixing.

FIG. 8 is an explanatory diagram of the influence of the mounting height on measurement.

FIG. 9 is an explanatory view of another embodiment of the vertical adjustment of the antenna unit.

FIG. 10 is an explanatory view of one embodiment of a bracket.

FIG. 11 is an explanatory view of a second embodiment of the bracket.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Mounting bracket, 2 ... Antenna unit, 3 ...
Number plate, 4 ... Vamper of vehicle.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kazuhiko Hanawa Hitachi, Ltd.

Claims (3)

[Claims] In an on-vehicle radar system for mounting an antenna unit on a front surface of a vehicle, a number plate can be fastened to a member for holding the antenna unit with a bolt hole of a number plate mounting bolt of the vehicle to be mounted on the vehicle. And a structure in which the antenna unit can be disposed either above or below the number plate. 2. The vehicle according to claim 1, wherein the mounting bracket has a plurality of bolt holes corresponding to bolt hole positions for the number plate at the number plate position of the vehicle corresponding to each vehicle standard. The vehicle mounting radar mounting bracket, wherein the bolt hole is an elongated hole pattern in which a bolt fastening position is movable in a vertical direction of the number plate. 3. The structure according to claim 1, wherein the mounting bracket has a structure for holding the antenna unit, wherein at least one bolt hole is provided on both side surfaces of the antenna unit, and the bolt hole is provided at a corresponding mounting position of the bracket. The vehicle mounting radar mounting bracket, wherein the provided bolt holes have a slot-like pattern in which a bolt fastening position is movable in the front-rear direction with the number plate.