TWI772890B - Vehicle auxiliary radar system with a field of view greater than 160 degrees still-pipe coupled antenna - Google Patents

Abstract

A vehicle auxiliary radar system with a field of view greater than 160 degrees of a still-pipe coupled antenna, comprising a main board, a still-pipe arranged on the main board, and two antenna boards arranged on the still-pipe, and the still-pipe extends upward from the bottom It is bifurcated into two left and right waveguide branch pipes, and a plurality of radiating antennas are respectively arranged on the antenna board. After the main board sends out a detection signal, it is transmitted to the antenna board through the waveguide branch pipe, and the radiation antenna is used to transmit the detection wave and receive the reflected wave to detect the surrounding obstacles. The waveguide tube of the present invention extends two waveguide branch tubes in opposite directions, and the antenna plates are respectively arranged thereon. Therefore, the two inclined antenna plates can increase the detection angle of the antenna and make the radar field of view wider.

Description

Vehicle Auxiliary Radar System with a Field of View Greater than 160° Still-pipe Coupled Antenna

The invention relates to the technology of a vehicle radar device, in particular to a vehicle auxiliary radar system with a field of view greater than 160 degrees of a waveguide coupling antenna.

With the advancement of technology, it also brings greater safety enhancement and convenience to driving. For example, a car radar is installed on the car to measure the distance between the front and rear obstacles, so as to sound a warning sound when the car is too close. This kind of warning is quite practical for drivers who are not familiar with the vehicle conditions and cannot grasp the length of the vehicle body. In this way, it can not only reduce the blind spots of the driver's field of vision, but also prevent the car from hitting the rear when reversing or the car in front when driving. Therefore, in the prior art, the above-mentioned vehicle radar can be applied to a car following system (Adaptive Cruise Control, ACC), blind spot detection (Blind Spot Detection, BSD), and Door Open Warning (DOW).

In general, vehicle assistance systems, such as Parking Assist System (PAS), Blind Spot Detection (BSD), Lane Change Alert (LCA), etc. The above vehicle radar is used, but it is designed as two independent radar systems and placed on the two sides of the vehicle bumper. The two independent radar systems transmit and receive the detection signal results, respectively, and then send back the detection and calculation of the obstacle distance to the on-board system. Then, the on-board system is responsible for judging whether a warning needs to be issued. Therefore, the in-vehicle system needs to be installed with the software of these in-vehicle auxiliary systems. If the in-vehicle system fails or crashes, the in-vehicle auxiliary system will also fail. Loss of function, affecting driving safety. In addition, the antenna of the traditional radar system is set on a plane. Since the detection range is not wide enough, two sets of radar systems need to be installed on both sides of the vehicle to detect a more comprehensive range, but the cost is high.

Therefore, the present invention proposes a vehicle auxiliary radar system with a field of view greater than 160 degrees of a still-pipe coupled antenna. A main board is arranged on the radar device, and the antenna board is split into two antenna boards in different directions, so as to effectively solve the above problems. The problem, the specific architecture and its implementation will be described in detail below:

The main purpose of the present invention is to provide a vehicle auxiliary radar system with a field of view greater than 160 degrees of a waveguide coupled antenna, which uses a waveguide with a special shape to guide the signal in two directions, and sends out detection waves through two antenna plates in different directions. , as long as a single radar device can achieve a wide range of 160 degrees detection.

Another object of the present invention is to provide a vehicle auxiliary radar system with a field of view greater than 160 degrees of a still-pipe coupled antenna, wherein a plurality of channels are arranged in the still-pipe, and each antenna corresponds to a channel, so that the signals will not be mixed.

In order to achieve the above object, the present invention provides a vehicle auxiliary radar system with a field of view greater than 160 degrees of a still-pipe coupled antenna, comprising: a main board for sending out a detection signal; a still-pipe, the bottom of which is arranged on the main board, and extend upward and branch into two left and right waveguide branch pipes; and two antenna plates, respectively set on the two waveguide branch pipes, and the two antenna plates are respectively provided with a plurality of radiating antennas, and the two antenna plates respectively pass through the waveguide branch pipes After receiving the detection signal, the radiation antennas are used to transmit detection waves and receive reflected waves to detect surrounding obstacles.

According to an embodiment of the present invention, the waveguide includes a plurality of channels, the bottom of each of the channels is provided with a first antenna space, which is connected to the back of the two antenna plates, and the top of each of the channels is respectively provided with a first antenna space. The second antenna space is connected to the front surface of the main board.

According to an embodiment of the present invention, a plurality of first radiation antennas are disposed on the main board, and each of the radiation antennas is respectively connected to one of the first radiation antennas.

According to an embodiment of the present invention, the radiation antennas are arranged on the front surfaces of the two antenna plates, and a plurality of second radiation antennas are arranged on the back surfaces of the two antenna plates, including receiving and One of the second antenna spaces is connected, and respectively receives or transmits signals through the still-pipe.

According to an embodiment of the present invention, the front surfaces of the two antenna plates are provided with a plurality of antennas including transmitting and receiving, which are respectively connected with the radiation antennas, and the antennas are coupled with the second radiation antennas on the back of the two antenna plates. A signal connection is made, so that the radiating antennas on the front side of the two antenna boards and the second radiating antennas on the back side receive or transmit detection signals through the antennas.

According to an embodiment of the present invention, the radiating antennas are arranged on the front surfaces of the two antenna plates to emit detection waves outward.

According to an embodiment of the present invention, the two antenna boards are inclined and symmetrical to each other.

According to an embodiment of the present invention, the waveguide is V-shaped or Y-shaped.

10: Vehicle auxiliary radar system with a field of view greater than 160 degrees waveguide coupling antenna

12: Motherboard

122: The first radiating antenna

14: still-pipe

142: Channel

144: First Antenna Space

146: Second Antenna Space

16: The first antenna board

162: The first signal coupling point

164: The third radiating antenna

166: Second radiating antenna

18: Second Antenna Board

182: Second signal coupling point

184: Fourth radiating antenna

186: Second radiating antenna

FIG. 1 is a perspective view of a vehicle auxiliary radar system with a field of view greater than 160 degrees of a still-pipe coupled antenna according to the present invention.

Fig. 2 is an exploded view of the vehicle auxiliary radar system with a field of view greater than 160 degrees of the still-pipe coupled antenna according to the present invention.

FIG. 3 is an exploded view of another view of the vehicle auxiliary radar system with a field of view greater than 160 degrees of the still-pipe coupled antenna according to the present invention.

FIG. 4 is a side sectional view of a vehicle auxiliary radar system with a field of view greater than 160 degrees of a still-pipe coupled antenna according to the present invention.

FIG. 5 is an enlarged schematic view of block A in FIG. 4 .

FIG. 6 is an enlarged schematic view of block B in FIG. 4 .

The present invention provides a vehicle auxiliary radar system with a field of view greater than 160 degrees of a waveguide coupled antenna, which utilizes a waveguide with a special shape and two antenna plates arranged on it to extend the detection range of the radar to a larger area than a general horizontal plane antenna plate. For a larger angle, when the vehicle radar device of the present invention is installed on the vehicle, the field of view of the radar can be made larger than 160 degrees in the case of a single vehicle radar device. The present invention is suitable for various vehicle auxiliary systems such as parking assistance systems and reversing radar systems.

Please refer to FIG. 1, FIG. 2 and FIG. 3 at the same time, which are a perspective view, an exploded view and an exploded view of another perspective view of the vehicle auxiliary radar system 10 with a field of view greater than 160 degrees of the still-pipe coupled antenna of the present invention. The front side of the antenna board can be seen in Figure 2, and the back side of the antenna board can be seen in Figure 3. The vehicle auxiliary radar system 10 having a field of view greater than 160 degrees of a still-pipe coupled antenna includes a main board 12 , a still-pipe 14 and two antenna boards, the two antenna boards being the first antenna board 16 and the second antenna board 18 respectively.

The main board 12 can be a printed circuit board, and a plurality of first radiating antennas 122 are disposed thereon. The first radiation antenna 122 is used for sending out detection signals, and the detection signals are then transmitted to the first antenna plate 16 and the second antenna plate 18 through the waveguide 14 . If an obstacle is detected, the first and second antenna plates 16 and 18 will also The transmitted or received signal is transmitted to the main board 12 through the still-pipe 14 , and the IC on the main board 12 is used to calculate and process the signal.

The bottom of the waveguide 14 is set on the main board 12 . The waveguide 14 extends upwards from the bottom and branches into two groups of waveguide branches, one left and one right, to form a V-shaped or Y-shaped waveguide 14 . As can be seen from FIG. 3 , the waveguide 14 includes a plurality of channels 142 . In this embodiment, the left and right groups of the waveguide branch tubes include three channels 142 respectively. Two ends of each channel 142 are respectively provided with a first antenna space 144 and a second antenna space 146, and two ends of each channel 142 are respectively connected with a radiating antenna, wherein the second antenna space 146 above the channel 142 The second radiating antennas 166 and 186 on the back of the first and second antenna boards 16 and 18 are engaged, and the first antenna space 144 under the channel 142 is engaged with the first radiating antenna 122 on the main board 12 . A further channel 142 extends laterally from the rightmost first antenna space 144 to the leftmost second antenna space 146 . The numbers of the channels 142 , the first antenna spaces 144 and the second antenna spaces 146 are all equal to the numbers of the first radiating antennas 122 and the second radiating antennas 166 and 186 .

The first antenna plate 16 and the second antenna plate 18 are respectively disposed on the left and right two waveguide branch pipes, and are inclined outward to achieve a larger detection angle. However, the inclination angle of the first and second antenna plates 16 and 18 should not be too large, and should be maintained within the angle where the detection ranges of each other can meet or overlap, so as to avoid the problem of a detection empty window area ahead. A plurality of second radiation antennas 166 are arranged on the back of the first antenna plate 16 , and a plurality of third radiation antennas 164 are arranged on the front surface. Each of the first signal coupling points 162 is located directly behind the second radiating antenna 166 . The first signal coupling point 162 can transmit the reflected detection signal to the second radiating antenna 166 on the back of the first antenna plate 16 by coupling. Each of the first signal coupling points 162 is connected to a third radiating antenna 164 respectively. The third radiating antenna 164 further includes a transmitting antenna and a receiving antenna, which are respectively used for sending out detection waves and receiving reflected waves reflected by obstacles, so as to detect whether there are obstacles around. In the present invention, the configuration on the second antenna plate 18 is the same as that of the first antenna plate 16 . on the second antenna The front side of the board 18 is provided with a plurality of second signal coupling points 182 and a plurality of fourth radiation antennas 184 , and a plurality of second radiation antennas 186 are provided on the back side. Each of the second radiating antennas 186 is disposed behind the second signal coupling point 182 respectively, and can transmit the signal to the second signal coupling point 182 by means of coupling. Each of the second signal coupling points 182 is respectively connected to a fourth radiation antenna 184. The fourth radiation antenna 184 also includes a transmitting antenna and a receiving antenna, which are respectively used for emitting detection waves and receiving reflected waves reflected by obstacles.

Since each of the second radiating antennas 166 and 186 is respectively connected to one of the second antenna spaces 146 on the waveguide 14 , the total number of the second radiating antennas 166 and 186 is also equal to the number of the second antenna spaces 146 . In addition, since the first and second signal coupling points 162 and 182 of each of the third radiating antenna 164 and the fourth radiating antenna 184 correspond to one channel 142 respectively, instead of using one large channel together, the back-and-forth signal transmission will not generate mixed problems.

FIG. 6 is a side sectional view of the present invention, from which the connection relationship among the main board 12 , the waveguide 14 , the first antenna board 16 and the second antenna board 18 can be clearly seen. The connecting area A between the top end of the channel 142 and the first antenna plate 16 is circled and shown in FIG. 4 in an enlarged manner. In addition, the connection area B between the channel 142 and the main board 12 is circled, and is shown enlarged in FIG. 5 .

It can be seen from FIG. 5 that the top of each channel 142 is facing the second radiating antenna 166 of the first antenna plate 16 , and the rear of the second radiating antenna 166 is on the other side of the first antenna plate 16 . It is the first signal coupling point 162 , and the third radiating antenna 164 for transmitting and receiving is connected behind the first signal coupling point 162 . As can be seen from FIG. 6 , the bottom of the channel 142 in the waveguide 14 is directly opposite to the first radiating antenna 122 on the main board 12 .

In the application of the present invention, the first radiating antenna 122 of the main board 12 sends a detection signal, which is received by the first antenna space 144 of the waveguide 14 . The signal will be detected through the channel 142 in the still-pipe 14 transmitted to the second antenna space 146 . Since the second antenna space 146 is connected to the second radiating antennas 166 and 186 on the backs of the first and second antenna plates 16 and 18 , the detection signal can be transmitted to the first and second antenna plates 16 and 18 . The second radiating antennas 166 and 186 then transmit the detection signals to the front surfaces of the first and second antenna plates 16 and 18 by means of coupling, and are received by the first and second signal coupling points 162 and 182 . The first and second signal coupling points 162 and 182 transmit the detection signals to the space around the vehicle in the form of radar waves through the transmitting antennas on the third radiation antenna 164 and the fourth radiation antenna 184 . When the detection wave touches the obstacle, it will be reflected back and received by the receiving antennas on the third and fourth radiating antennas 164 and 184 . Then, the signal of the reflected wave is sent back to the main board 12 along the same path for the main board 12 to calculate the obstacle distance, and then sent back to the back-end on-board computer or other on-board hosts to issue a warning.

Only the above descriptions are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Therefore, all equivalent changes or modifications made according to the features and spirits described in the scope of the application of the present invention shall be included in the scope of the application for patent of the present invention.

10: Vehicle auxiliary radar system with a field of view greater than 160 degrees waveguide coupling antenna

12: Motherboard

14: still-pipe

16: The first antenna board

162: The first signal coupling point

164: The third radiating antenna

18: Second Antenna Board

182: Second signal coupling point

184: Fourth radiating antenna

Claims (7)

A vehicle auxiliary radar system with a field of view greater than 160 degrees of a waveguide coupling antenna, comprising: a main board for sending a detection signal, a plurality of first radiating antennas are arranged on the main board; a waveguide whose bottom is arranged on the on the main board, extending upward and branching into two left and right waveguide branch pipes; and two antenna boards, respectively disposed on the two waveguide branch pipes, and a plurality of radiating antennas are respectively arranged on the two antenna boards, and each of the radiating antennas One of the first radiation antennas is respectively connected, and the two antenna plates respectively receive the detection signal through the waveguide branch pipe, and then use the radiation antennas to transmit detection waves and receive reflected waves to detect surrounding obstacles. The vehicle auxiliary radar system with a field of view greater than 160 degrees of a still-pipe coupled antenna as described in claim 1, wherein the still-pipe includes a plurality of channels, and a first antenna space is arranged at the bottom of each of the channels to connect the two The front side of the line board and the top of each of the channels are respectively provided with a second antenna space, which is connected to the back side of the main board. The vehicle auxiliary radar system with a field of view greater than 160 degrees of still-pipe coupled antennas as described in claim 2, wherein the radiating antennas are arranged on the front of the two antenna plates, and a plurality of second radiations are arranged on the back of the two antenna plates Antennas, including receiving and transmitting antennas, are respectively connected with one of the second antenna spaces on the still-pipe, and receive or transmit signals through the still-pipe. The vehicle auxiliary radar system with a field of view greater than 160 degrees of still-pipe coupled antennas as described in claim 3, wherein a plurality of antennas are arranged on the front of the two antenna plates, which are respectively connected with the radiation antennas, and the antennas are connected with the two antennas. The second radiating antenna on the back of the line plate is coupled The signal connection enables the radiating antennas on the front side of the two antenna boards and the second radiating antennas on the back side to receive or transmit detection signals through the antennas. The vehicle auxiliary radar system with a field of view greater than 160 degrees of still-pipe coupled antennas as described in claim 1, wherein the radiating antennas are arranged on the front of the two antenna plates to emit detection waves outward. The vehicle auxiliary radar system with a field of view greater than 160 degrees of a still-pipe coupled antenna as described in claim 1, wherein the two antenna plates are arranged obliquely and symmetrical to each other. The vehicle auxiliary radar system with a field of view greater than 160 degrees of a still-pipe coupled antenna as described in claim 1, wherein the still-pipe is V-shaped or Y-shaped.

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