WO2023248889A1 - Radio wave sensor - Google Patents

Radio wave sensor Download PDF

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Publication number
WO2023248889A1
WO2023248889A1 PCT/JP2023/022061 JP2023022061W WO2023248889A1 WO 2023248889 A1 WO2023248889 A1 WO 2023248889A1 JP 2023022061 W JP2023022061 W JP 2023022061W WO 2023248889 A1 WO2023248889 A1 WO 2023248889A1
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WO
WIPO (PCT)
Prior art keywords
radio wave
wave sensor
antenna
pedestrian
waiting area
Prior art date
Application number
PCT/JP2023/022061
Other languages
French (fr)
Japanese (ja)
Inventor
良介 笹倉
貴央 中川
正樹 岸
芳嗣 平田
Original Assignee
住友電気工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 住友電気工業株式会社 filed Critical 住友電気工業株式会社
Publication of WO2023248889A1 publication Critical patent/WO2023248889A1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88—Radar or analogous systems specially adapted for specific applications
    • G01S13/91—Radar or analogous systems specially adapted for specific applications for traffic control
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/03—Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/01—Detecting movement of traffic to be counted or controlled
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/29—Combinations of different interacting antenna units for giving a desired directional characteristic

Definitions

  • the present disclosure relates to a radio wave sensor.
  • This application claims priority based on Japanese Patent Application No. 2022-098720, which is a Japanese patent application filed on June 20, 2022. All contents described in the Japanese patent application are incorporated herein by reference.
  • JP 2015-224936A Patent Document 1
  • JP 2017-90078 A Patent Document 2
  • Each of the radio wave sensor of Patent Document 1 and the radio wave sensor of Patent Document 2 is fixed to a support.
  • a first sidewalk and a second sidewalk are provided along the roadway.
  • the first sidewalk includes a first pedestrian waiting area.
  • the second sidewalk includes a second pedestrian waiting area.
  • the pillar to which the radio wave sensor of Patent Document 1 is fixed is installed on the first sidewalk. Radio waves emitted from the radio wave sensor of Patent Document 1 are irradiated onto the crosswalk and the second pedestrian waiting area. The radio wave sensor detects pedestrians in the crosswalk or the second pedestrian waiting area.
  • a radio wave sensor includes a first antenna device and a second antenna device.
  • the first antenna device includes a first transmitting antenna that transmits a first radio wave to a first pedestrian waiting area.
  • the second antenna device includes a second transmitting antenna that transmits a second radio wave to at least one of a crosswalk or a second pedestrian waiting area.
  • the first pedestrian waiting area is included in the sidewalk where the radio wave sensor is placed.
  • the crosswalk is adjacent to the first pedestrian waiting area.
  • the second pedestrian waiting area is located on the opposite side of the crosswalk from the first pedestrian waiting area and is adjacent to the crosswalk.
  • FIG. 1 is a schematic perspective view showing an installation example of a radio wave sensor according to the first embodiment.
  • FIG. 2 is a schematic side view showing an installation example of the radio wave sensor according to the first embodiment.
  • FIG. 3 is a schematic cross-sectional view of the radio wave sensor of Embodiment 1.
  • FIG. 4 is a schematic block diagram of the traffic safety support system according to the first embodiment.
  • FIG. 5 is a schematic cross-sectional view of a radio wave sensor according to a first modification of the first embodiment.
  • FIG. 6 is a schematic cross-sectional view of a radio wave sensor according to a second modification of the first embodiment.
  • FIG. 7 is a schematic cross-sectional view of a radio wave sensor according to a third modification of the first embodiment.
  • FIG. 8 is a schematic cross-sectional view of a radio wave sensor according to a fourth modification of the first embodiment.
  • FIG. 9 is a schematic perspective view of a radio wave sensor according to the second embodiment.
  • the pillar to which the radio wave sensor of Patent Document 1 is fixed is installed on the first sidewalk. Therefore, although the radio waves emitted from the radio wave sensor of Patent Document 1 can be irradiated to the crosswalk and the second pedestrian waiting area, the radio waves cannot be irradiated to the first pedestrian waiting area.
  • the radio wave sensor of Patent Document 1 cannot detect pedestrians in the first pedestrian waiting area. In order to detect pedestrians in the first pedestrian waiting area, it is necessary to install another support on the second sidewalk and fix another radio wave sensor to this support. However, providing another support and another radio wave sensor increases the installation cost and installation space of the radio wave sensor.
  • the radio wave sensor of Patent Document 2 In order to irradiate the radio waves emitted from the radio wave sensor of Patent Document 2 to the first pedestrian waiting area in addition to the crosswalk and the second pedestrian waiting area, the radio wave sensor of Patent Document 2 is moved far back from the roadway. and place it. Therefore, the installation space for the radio wave sensor increases. If there is a building right next to the first sidewalk, the radio wave sensor of Patent Document 2 cannot be installed. Furthermore, when the radio wave sensor of Patent Document 2 is fixed to a pillar installed on the first sidewalk and to which a car traffic signal is fixed, the radio waves emitted from the radio wave sensor of Patent Document 2 can be transmitted to the first pedestrian waiting area. Therefore, the radio wave sensor of Patent Document 2 cannot be fixed to the pillar installed on the first sidewalk and to which the automobile traffic signal is fixed.
  • the present disclosure has been made in view of the above-mentioned problems, and its purpose is to be able to detect pedestrians in a pedestrian waiting area on the side where the radio wave sensor is arranged with respect to the roadway, and
  • An object of the present invention is to provide a radio wave sensor that can reduce the installation cost and installation space of the radio wave sensor.
  • the first antenna device 20 includes a first transmitting antenna 22 and a second transmitting antenna 27, the first antenna device 20 is used to transmit data on the side where the radio wave sensor 1 is arranged with respect to the roadway (first roadway 2). Pedestrians present in the first pedestrian waiting area 7 can be detected. There is no need to provide another support and another radio wave sensor to detect pedestrians in the first pedestrian waiting area 7. The installation cost of the radio wave sensor 1 and the installation space of the radio wave sensor 1 can be reduced.
  • the first transmitting antenna 22 includes the first transmitting antenna element 22a.
  • the second transmitting antenna 27 includes a second transmitting antenna element 27a.
  • the number of first transmitting antenna elements 22a is smaller than the number of second transmitting antenna elements 27a.
  • the first spread angle ⁇ 1 of the first radio wave 23 can be made larger than the second spread angle ⁇ 2 of the second radio wave 28 .
  • the radio wave sensor 1 of (4) above further includes at least one of the first angle adjuster 51 or the second angle adjuster 56.
  • the first angle adjuster 51 can adjust the first direction of the first main surface 21a.
  • the second angle adjuster 56 can adjust the second direction of the second main surface 26a.
  • the housing 30 protects the first antenna device 20 and the second antenna device 25 from rain, wind, dust, and the like. Therefore, the life of the radio wave sensor 1 is extended.
  • the housing 30 further includes a sealing member 36.
  • the sealing member 36 is disposed between the base plate 31 and the radome 32 and seals between the base plate 31 and the radome 32.
  • the sealing member 36 more reliably prevents rain, wind, dust, etc. from entering the accommodation space 30a where the first antenna device 20 and the second antenna device 25 are accommodated. Therefore, the life of the radio wave sensor 1 is extended.
  • the housing 30 protects the first antenna device 20 and the second antenna device 25 from rain, wind, dust, and the like. Therefore, the life of the radio wave sensor 1 is extended.
  • the housing 30 further includes a first sealing member 36a and a second sealing member 36b.
  • the first sealing member 36a is disposed between the case 37 and the first window member 38, and seals between the case 37 and the first window member 38.
  • the second sealing member 36b is disposed between the case 37 and the second window member 39, and seals between the case 37 and the second window member 39.
  • the radio wave sensor 1 is placed above the first sidewalk 6.
  • the radio wave sensor 1 may be placed above a portion of the first sidewalk 6 near the intersection 5.
  • the intersection 5 is a portion where the first roadway 2 and the second roadway 4 intersect with each other.
  • a car, a motorcycle, or the like runs on the first roadway 2 and the second roadway 4.
  • the first sidewalk 6 and the second sidewalk 8 are provided along the first roadway 2.
  • Pedestrians walk on the first sidewalk 6 and the second sidewalk 8.
  • the first sidewalk 6 is arranged on one side of the first roadway 2 in the width direction of the first roadway 2.
  • the second sidewalk 8 is arranged on the other side of the first roadway 2 in the width direction of the first roadway 2 .
  • a crosswalk 3 is installed on the first roadway 2.
  • the crosswalk 3 is installed near the intersection 5.
  • the crosswalk 3 may be installed at a location on the first roadway 2 where the intersection 5 is not provided.
  • a first support 10a is installed on the first sidewalk 6.
  • the first pillar 10a may be provided in the first pedestrian waiting area 7.
  • An automobile traffic light 11, a first pedestrian traffic light 13a, and a radio wave sensor 1 are provided on the first support 10a.
  • the automobile traffic light 11 displays a drive instruction or a stop instruction (for example, turns on a green light or a red light) to the driver of a car traveling on the first roadway 2.
  • the automobile traffic signal 11 is fixed to the first support column 10a via an arm 12.
  • the automobile traffic signal 11 may be directly fixed to the first support column 10a.
  • the first pedestrian traffic light 13a displays a walking instruction or a stop instruction to pedestrians waiting in the second pedestrian waiting area 9 (for example, by lighting a green light or a red light).
  • the first pedestrian traffic light 13a is directly fixed to the first support column 10a.
  • the first pedestrian traffic light 13a may be fixed to the first support column 10a via an arm (not shown).
  • the radio wave sensor 1 is fixed to the first support 10a via the arm 14.
  • the radio wave sensor 1 may be directly fixed to the first support column 10a.
  • a second support post 10b is installed on the second sidewalk 8.
  • the second pillar 10b may be provided in the second pedestrian waiting area 9.
  • a second pedestrian traffic light 13b is provided on the second pillar 10b.
  • the second pedestrian traffic light 13b displays a walking instruction or a stop instruction to pedestrians waiting in the first pedestrian waiting area 7 (for example, by lighting a green light or a red light).
  • the second pedestrian traffic light 13b is directly fixed to the second support column 10b.
  • the second pedestrian traffic light 13b may be fixed to the second support column 10b via an arm (not shown).
  • the radio wave sensor 1 mainly includes a first antenna device 20, a second antenna device 25, a housing 30, and a controller 41.
  • the first antenna device 20 includes a first antenna substrate 21, a first transmitting antenna 22, and a first receiving antenna 24.
  • the first antenna substrate 21 includes a first main surface 21a.
  • the first transmitting antenna 22 emits a first radio wave 23.
  • the first transmitting antenna 22 includes a first transmitting antenna element 22a.
  • the first transmitting antenna element 22a is mounted on the first main surface 21a.
  • the first transmission antenna element 22a radiates radio waves.
  • the radio waves radiated from the first transmitting antenna element 22a are combined to become the first radio wave 23.
  • the first transmitting antenna 22 irradiates the irradiation area 16 with the first radio wave 23.
  • the irradiation area 16 includes the first pedestrian waiting area 7.
  • the first transmitting antenna 22 transmits a first radio wave 23 to the first pedestrian waiting area 7.
  • the first radio wave 23 is, for example, a millimeter wave.
  • the first radio wave 23 advances toward the first pedestrian waiting area 7 while spreading at a first spread angle ⁇ 1 .
  • the first divergence angle ⁇ 1 is, for example, 72° or more and 168° or less.
  • the first traveling direction 23a of the first radio wave 23 may be the direction of the first normal 21b of the first main surface 21a, or may be inclined from the first normal 21b of the first main surface 21a.
  • the first traveling direction 23a of the first radio wave 23 is the center direction of the first spread angle ⁇ 1 of the first radio wave 23.
  • the first receiving antenna 24 receives the first radio waves 23 reflected by pedestrians in the first pedestrian waiting area 7.
  • the first receiving antenna 24 includes a first receiving antenna element 24a.
  • the first receiving antenna element 24a is mounted on the first main surface 21a.
  • the first receiving antenna element 24a receives the first radio waves 23 reflected by pedestrians in the first pedestrian waiting area 7.
  • the first receiving antenna 24 transmits a first signal to the controller 41 (specifically, the first control unit 42).
  • the second antenna device 25 includes a second antenna substrate 26, a second transmitting antenna 27, and a second receiving antenna 29.
  • the second antenna substrate 26 includes a second main surface 26a.
  • the second transmitting antenna 27 transmits a second radio wave 28 to the crosswalk 3 and the second pedestrian waiting area 9.
  • the irradiation area 17 is connected to the irradiation area 16 and the irradiation area 18, for example. A portion of the irradiation area 17 may overlap the irradiation area 16. A part of the irradiation area 17 may overlap the irradiation area 18.
  • the second radio wave 28 is, for example, a millimeter wave.
  • the second transmitting antenna 27 may irradiate only the irradiation area 17 with the second radio wave 28. That is, the second transmitting antenna 27 may transmit the second radio wave 28 to the crosswalk 3 without transmitting the second radio wave 28 to the second pedestrian waiting area 9.
  • the second transmitting antenna 27 may irradiate only the irradiation area 18 with the second radio wave 28 . That is, the second transmitting antenna 27 may transmit the second radio wave 28 to the second pedestrian waiting area 9 without transmitting the second radio wave 28 to the crosswalk 3.
  • the second transmitting antenna 27 may irradiate at least one of the irradiation area 17 or the irradiation area 18 with the second radio wave 28 .
  • the second transmitting antenna 27 may transmit the second radio wave 28 to at least one of the crosswalk 3 and the second pedestrian waiting area 9.
  • at least one of the irradiation area 17 or the irradiation area 18 means the irradiation area 17, the irradiation area 18, or the irradiation area 17 and the irradiation area 18.
  • At least one of the crosswalk 3 or the second pedestrian waiting area 9 means the crosswalk 3, the second pedestrian waiting area 9, or the crosswalk 3 and the second pedestrian waiting area 9.
  • the second radio wave 28 travels toward at least one of the crosswalk 3 and the second pedestrian waiting area 9 while spreading at a second spread angle ⁇ 2 .
  • the second divergence angle ⁇ 2 is, for example, 50° or more and 63° or less.
  • the second traveling direction 28a of the second radio wave 28 may be in the direction of the second normal 26b of the second main surface 26a, or may be inclined from the second normal 26b of the second main surface 26a.
  • the second traveling direction 28a of the second radio wave 28 is the center direction of the second spread angle ⁇ 2 of the second radio wave 28.
  • the second receiving antenna 29 receives the second radio waves 28 reflected by pedestrians on at least one of the crosswalk 3 or the second pedestrian waiting area 9.
  • the second receiving antenna 29 includes a second receiving antenna element 29a.
  • the second receiving antenna element 29a is mounted on the second main surface 26a.
  • the second receiving antenna element 29a receives the second radio wave 28 reflected by a pedestrian on at least one of the crosswalk 3 or the second pedestrian waiting area 9.
  • the second receiving antenna 29 transmits a second signal to the controller 41 (specifically, the second control section 43).
  • the first distance between the radio sensor 1 and the first pedestrian waiting area 7 is the distance between the radio sensor 1 and at least one of the crosswalk 3 or the second pedestrian waiting area 9. shorter than the second distance between. Therefore, the first transmission power supplied to the first transmission antenna 22 may be equal to the second transmission power supplied to the second transmission antenna 27, or may be smaller than the second transmission power.
  • the housing 30 accommodates the first antenna device 20 and the second antenna device 25.
  • the housing 30 includes a base plate 31, a radome 32, and a fixing member 35.
  • a housing space 30a is formed by the base plate 31 and the radome 32.
  • the first antenna device 20 and the second antenna device 25 are housed in the housing space 30a.
  • the housing 30 may further include a sealing member 36.
  • the base plate 31 is made of metal, for example.
  • the base plate 31 may be formed of a material that does not allow the first radio waves 23 and the second radio waves 28 to pass through.
  • the base plate 31 includes a main surface 31a facing the radome 32.
  • the radome 32 is made of a material (for example, resin) that transmits the first radio wave 23 and the second radio wave 28 .
  • the radome 32 is fixed to the base plate 31 using a fixing member 35.
  • the radome 32 includes a flange 32a facing the main surface 31a of the base plate 31.
  • the fixing member 35 is, for example, a screw.
  • the flange 32a of the radome 32 is fastened to the base plate 31 using a fixing member 35.
  • the sealing member 36 seals between the base plate 31 and the radome 32.
  • the sealing member 36 is arranged between the base plate 31 and the radome 32.
  • the sealing member 36 is arranged between the main surface 31a of the base plate 31 and the flange 32a of the radome 32.
  • the sealing member 36 is, for example, an O-ring.
  • controller 41 controls first antenna device 20, second antenna device 25, and signal transmitter 45 included in traffic safety support system 40.
  • the controller 41 may be housed in the housing 30, for example.
  • the controller 41 may be placed outside the housing 30, and may be fixed to the first support 10a, for example.
  • the controller 41 includes, for example, a first control section 42, a second control section 43, and a third control section 44.
  • the first control unit 42 controls the first antenna device 20.
  • the second control unit 43 controls the second antenna device 25.
  • the third control section 44 controls the signal transmitter 45.
  • the first control unit 42 controls the first transmitting antenna 22 to cause the first transmitting antenna 22 to radiate the first radio wave 23 toward the first pedestrian waiting area 7 .
  • the first control unit 42 receives the first signal from the first receiving antenna 24.
  • the first control unit 42 processes the first signal and outputs a first pedestrian detection signal to the third control unit 44 when a pedestrian is present in the first pedestrian waiting area 7 .
  • the second control unit 43 controls the second transmitting antenna 27 to cause the second transmitting antenna 27 to radiate the second radio wave 28 toward at least one of the crosswalk 3 and the second pedestrian waiting area 9.
  • the second control unit 43 receives the second signal from the second receiving antenna 29.
  • the second control unit 43 processes the second signal, outputs a second pedestrian detection signal to the third control unit 44 when there is a pedestrian in the second pedestrian waiting area 9, and When a pedestrian is present, a third pedestrian detection signal is output to the third controller 44.
  • the controller 41 controls the first antenna device 20 to cause the first transmitting antenna 22 to transmit the first radio wave 23 toward the first pedestrian waiting area 7.
  • the first radio wave 23 is reflected by the pedestrian and returns to the first antenna device 20 .
  • the first receiving antenna 24 receives the first radio wave 23 reflected by the pedestrian.
  • the first receiving antenna 24 transmits a first signal to the controller 41 (specifically, the first control unit 42).
  • the first control unit 42 processes the first signal and outputs a first pedestrian detection signal to the third control unit 44 when a pedestrian is present in the first pedestrian waiting area 7 .
  • the controller 41 controls the second antenna device 25 to cause the second transmitting antenna 27 to transmit the second radio wave 28 toward at least one of the crosswalk 3 and the second pedestrian waiting area 9.
  • the second radio wave 28 is reflected by the pedestrian and returns to the second antenna device 25.
  • the second receiving antenna 29 receives the second radio wave 28 reflected by the pedestrian.
  • the second receiving antenna 29 transmits a second signal to the controller 41 (specifically, the second control section 43).
  • the second control unit 43 processes the second signal, outputs a second pedestrian detection signal to the third control unit 44 when there is a pedestrian in the second pedestrian waiting area 9, and When a pedestrian is present, a third pedestrian detection signal is output to the third controller 44.
  • the third control unit 44, the signal transmitter 45, the automobile traffic signal 11, the first pedestrian traffic signal 13a, and the second pedestrian traffic signal 13b are configured so that the third control unit 44 detects the second pedestrian from the second control unit 43.
  • the third control section 44 operates in the same manner as when receiving the first pedestrian detection signal from the first control section 42 .
  • the base plate 31 includes a side surface 31c connected to the main surface 31a.
  • the side surface 31c faces the radome 32.
  • the radome 32 is fastened to the side surface 31c of the base plate 31 using a fixing member 35.
  • the sealing member 36 is arranged between the side surface 31c of the base plate 31 and the radome 32.
  • the housing 30 includes a case 37, a first window member 38, a second window member 39, a first fixing member 35a, and a second window member 38. and a fixing member 35b.
  • a housing space 30a is formed by the case 37, the first window member 38, and the second window member 39.
  • the first antenna device 20 and the second antenna device 25 are housed in the housing space 30a.
  • the housing 30 may further include a first sealing member 36a and a second sealing member 36b.
  • the case 37 is made of metal, for example.
  • the case 37 may be formed of a material that does not allow the first radio waves 23 and the second radio waves 28 to pass through.
  • Case 37 includes an outer surface 37a and an inner surface 37b opposite to outer surface 37a.
  • the case 37 is provided with a first opening 37c and a second opening 37d.
  • the first opening 37c and the second opening 37d each extend from the outer surface 37a to the inner surface 37b.
  • the first window member 38 is fixed to the case 37 using the first fixing member 35a, and closes the first opening 37c.
  • the first fixing member 35a is a screw
  • the first window member 38 is fastened to the case 37 using the first fixing member 35a.
  • the first window member 38 faces the first antenna device 20.
  • the first window member 38 faces the outer surface 37a of the case 37.
  • the first window member 38 is made of a material (for example, resin) that allows the first radio wave 23 to pass through.
  • the first sealing member 36a seals between the case 37 and the first window member 38.
  • the first sealing member 36a is arranged between the outer surface 37a of the case 37 and the first window member 38.
  • the first sealing member 36a is, for example, an O-ring.
  • the second sealing member 36b seals between the case 37 and the second window member 39.
  • the second sealing member 36b is arranged between the outer surface 37a of the case 37 and the second window member 39.
  • the second sealing member 36b is, for example, an O-ring.
  • the radio wave sensor 1 of this embodiment has the same configuration as the radio wave sensor 1 of the first embodiment, but differs from the radio wave sensor 1 of the first embodiment in the following points.
  • the radio wave sensor 1 of this embodiment further includes a support substrate 50, a first angle adjuster 51, and a second angle adjuster 56.
  • the support substrate 50 supports a first angle adjuster 51 and a second angle adjuster 56.
  • the first antenna device 20 is supported by a support substrate 50 via a first angle adjuster 51.
  • the second antenna device 25 is supported by the support substrate 50 via a second angle adjuster 56.
  • the first angle adjuster 51 can adjust the first direction of the first main surface 21a. Therefore, the first traveling direction 23a of the first radio wave 23 can be adjusted.
  • the first angle adjuster 51 includes a support 52 and a hinge 53.
  • the support column 52 is fixed to the support substrate 50.
  • the support column 52 rotatably supports the hinge 53.
  • the hinge 53 is fixed to the first antenna board 21.
  • the first antenna device 20, the second antenna device 25, the support substrate 50, the first angle adjuster 51, and the second angle adjuster 56 of the present embodiment are connected to the housing 30 of the first embodiment or a modification thereof. (See FIGS. 2, 3 and 5 to 8).
  • the radio wave sensor 1 of this embodiment may include one of the first angle adjuster 51 and the second angle adjuster 56, or the other of the first angle adjuster 51 and the second angle adjuster 56 may be omitted. good. That is, the radio wave sensor 1 only needs to include at least one of the first angle adjuster 51 and the second angle adjuster 56.
  • a first antenna device A radio wave sensor comprising a second antenna device
  • the first antenna device includes a first transmitting antenna that transmits a first radio wave to a first pedestrian waiting area
  • the second antenna device includes a second transmitting antenna that transmits a second radio wave to at least one of a crosswalk or a second pedestrian waiting area
  • the first pedestrian waiting area is included in the sidewalk where the radio wave sensor is arranged,
  • the crosswalk is adjacent to the first pedestrian waiting area
  • the second pedestrian waiting area is a radio wave sensor adjacent to the crosswalk and on the opposite side of the crosswalk from the first pedestrian waiting area.
  • the first transmit power supplied to the first transmit antenna for transmitting the first radio wave is equal to or greater than the second transmit power supplied to the second transmit antenna for transmitting the second radio wave.
  • the radio wave sensor described in Appendix 1 is also small.
  • the first transmitting antenna includes a first transmitting antenna element;
  • the second transmitting antenna includes a second transmitting antenna element;
  • the first antenna device includes a first antenna substrate including a first main surface, The first transmitting antenna is mounted on the first main surface,
  • the second antenna device includes a second antenna substrate including a second main surface,
  • the radio wave sensor according to any one of Supplementary notes 1 to 3, wherein the second transmitting antenna is mounted on the second main surface.
  • Appendix 5 further comprising at least one of a first angle adjuster or a second angle adjuster,
  • the first angle adjuster is capable of adjusting a first direction of the first main surface
  • the radio wave sensor according to appendix 4 wherein the second angle adjuster is capable of adjusting the second direction of the second principal surface.
  • Embodiment 1, Embodiment 2, and their modifications disclosed this time are illustrative in all respects, and should be considered not to be restrictive. Unless there is a contradiction, at least two of the first and second embodiments and their modifications disclosed herein may be combined.
  • the scope of the present disclosure is indicated by the claims rather than the embodiments described above, and it is intended that equivalent meanings to the claims and all changes within the scope are included.
  • 1 radio wave sensor 2 first roadway, 3 crosswalk, 4 second roadway, 5 intersection, 6 first sidewalk, 7 first pedestrian waiting area, 8 second sidewalk, 9 second pedestrian waiting area, 10a first Pillar, 10b Second pillar, 11 Automobile traffic light, 12 Arm, 13a First pedestrian traffic light, 13b Second pedestrian traffic light, 14 Arm, 16, 17, 18 Irradiation area, 20 First antenna device, 21 1 antenna substrate, 21a first principal surface, 21b first normal, 22 first transmitting antenna, 22a first transmitting antenna element, 23 first radio wave, 23a first traveling direction, 24 first receiving antenna, 24a first receiving Antenna element, 25 Second antenna device, 26 Second antenna substrate, 26a Second principal surface, 26b Second normal, 27 Second transmitting antenna, 27a Second transmitting antenna element, 28 Second radio wave, 28a Second direction of travel , 29 second receiving antenna, 29a second receiving antenna element, 30 housing, 30a housing space, 31 base plate, 31a main surface, 31b protrusion, 31c side surface, 32 radome, 32a flange, 35 fixing member, 35a first fixing

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Electromagnetism (AREA)
  • Traffic Control Systems (AREA)

Abstract

A radio wave sensor (1) comprises a first antenna device (20) and a second antenna device (25). The first antenna device (20) includes a first transmission antenna that transmits a first radio wave (23) to a first pedestrian waiting area (7). The second antenna device (25) includes a second transmission antenna that transmits a second radio wave (28) to at least one of a pedestrian crossing (3) or a second pedestrian waiting area (9).

Description

電波センサradio wave sensor
　本開示は、電波センサに関する。本出願は、２０２２年６月２０日に出願した日本特許出願である特願２０２２－０９８７２０号に基づく優先権を主張する。当該日本特許出願に記載された全ての記載内容は、参照によって本明細書に援用される。 The present disclosure relates to a radio wave sensor. This application claims priority based on Japanese Patent Application No. 2022-098720, which is a Japanese patent application filed on June 20, 2022. All contents described in the Japanese patent application are incorporated herein by reference.
　特開２０１５－２２４９３６号公報（特許文献１）及び特開２０１７－９００７８号公報（特許文献２）は、各々、電波センサを開示している。特許文献１の電波センサ及び特許文献２の電波センサの各々は、支柱に固定されている。第１歩道と第２歩道とが、車道に沿って設けられている。第１歩道は、第１歩行者待機エリアを含む。第２歩道は、第２歩行者待機エリアを含む。車道には、横断歩道が設けられている。横断歩道は、第１歩行者待機エリアと第２歩行者待機エリアとに接続されている。 JP 2015-224936A (Patent Document 1) and JP 2017-90078 A (Patent Document 2) each disclose a radio wave sensor. Each of the radio wave sensor of Patent Document 1 and the radio wave sensor of Patent Document 2 is fixed to a support. A first sidewalk and a second sidewalk are provided along the roadway. The first sidewalk includes a first pedestrian waiting area. The second sidewalk includes a second pedestrian waiting area. There are crosswalks on the road. The crosswalk is connected to a first pedestrian waiting area and a second pedestrian waiting area.
　特許文献１の電波センサが固定されている支柱は、第１歩道に設置されている。特許文献１の電波センサから放射される電波は、横断歩道と、第２歩行者待機エリアとに照射される。電波センサは、横断歩道または第２歩行者待機エリアにいる歩行者を検出する。 The pillar to which the radio wave sensor of Patent Document 1 is fixed is installed on the first sidewalk. Radio waves emitted from the radio wave sensor of Patent Document 1 are irradiated onto the crosswalk and the second pedestrian waiting area. The radio wave sensor detects pedestrians in the crosswalk or the second pedestrian waiting area.
　特許文献２の電波センサが固定されている支柱は、第１歩道に対して車道とは反対側に設置されている。支柱及び電波センサは、車道から大きく後退して配置されている。特許文献２の電波センサから放射される電波は、第１歩行者待機エリアと、横断歩道と、第２歩行者待機エリアとに照射される。電波センサは、第１歩行者待機エリア、横断歩道または第２歩行者待機エリアのいずれかにいる歩行者を検出する。 The pillar to which the radio wave sensor of Patent Document 2 is fixed is installed on the opposite side of the roadway with respect to the first sidewalk. The pillars and radio wave sensors are placed far back from the roadway. Radio waves emitted from the radio wave sensor of Patent Document 2 are irradiated onto a first pedestrian waiting area, a crosswalk, and a second pedestrian waiting area. The radio wave sensor detects a pedestrian in either the first pedestrian waiting area, the crosswalk, or the second pedestrian waiting area.
特開２０１５－２２４９３６号公報Japanese Patent Application Publication No. 2015-224936 特開２０１７－９００７８号公報JP 2017-90078 Publication
　本開示の第一局面の電波センサは、第１アンテナ装置と、第２アンテナ装置とを備える。第１アンテナ装置は、第１歩行者待機エリアに第１電波を送信する第１送信アンテナを含む。第２アンテナ装置は、横断歩道または第２歩行者待機エリアの少なくとも一つに第２電波を送信する第２送信アンテナを含む。第１歩行者待機エリアは、電波センサが配置される歩道に含まれる。横断歩道は、第１歩行者待機エリアに隣接している。第２歩行者待機エリアは、横断歩道に対して第１歩行者待機エリアとは反対側で、横断歩道に隣接している。 A radio wave sensor according to the first aspect of the present disclosure includes a first antenna device and a second antenna device. The first antenna device includes a first transmitting antenna that transmits a first radio wave to a first pedestrian waiting area. The second antenna device includes a second transmitting antenna that transmits a second radio wave to at least one of a crosswalk or a second pedestrian waiting area. The first pedestrian waiting area is included in the sidewalk where the radio wave sensor is placed. The crosswalk is adjacent to the first pedestrian waiting area. The second pedestrian waiting area is located on the opposite side of the crosswalk from the first pedestrian waiting area and is adjacent to the crosswalk.
図１は、実施形態１の電波センサの設置例を示す概略斜視図である。FIG. 1 is a schematic perspective view showing an installation example of a radio wave sensor according to the first embodiment. 図２は、実施形態１の電波センサの設置例を示す概略側面図である。FIG. 2 is a schematic side view showing an installation example of the radio wave sensor according to the first embodiment. 図３は、実施形態１の電波センサの概略断面図である。FIG. 3 is a schematic cross-sectional view of the radio wave sensor of Embodiment 1. 図４は、実施形態１の交通安全支援システムの概略ブロック図である。FIG. 4 is a schematic block diagram of the traffic safety support system according to the first embodiment. 図５は、実施形態１の第１変形例の電波センサの概略断面図である。FIG. 5 is a schematic cross-sectional view of a radio wave sensor according to a first modification of the first embodiment. 図６は、実施形態１の第２変形例の電波センサの概略断面図である。FIG. 6 is a schematic cross-sectional view of a radio wave sensor according to a second modification of the first embodiment. 図７は、実施形態１の第３変形例の電波センサの概略断面図である。FIG. 7 is a schematic cross-sectional view of a radio wave sensor according to a third modification of the first embodiment. 図８は、実施形態１の第４変形例の電波センサの概略断面図である。FIG. 8 is a schematic cross-sectional view of a radio wave sensor according to a fourth modification of the first embodiment. 図９は、実施形態２の電波センサの概略斜視図である。FIG. 9 is a schematic perspective view of a radio wave sensor according to the second embodiment.
　[本開示が解決しようとする課題]
　しかし、特許文献１の電波センサが固定されている支柱は、第１歩道に設置されている。そのため、特許文献１の電波センサから放射される電波を横断歩道と第２歩行者待機エリアとに照射することはできるが、当該電波を第１歩行者待機エリアに照射することはできない。特許文献１の電波センサは第１歩行者待機エリアにいる歩行者を検出することができない。第１歩行者待機エリアにいる歩行者を検出するためには、第２歩道に別の支柱を設置して、この支柱に別の電波センサを固定する必要がある。しかし、別の支柱及び別の電波センサを設けると、電波センサの設置コスト及び電波センサの設置スペースが増加する。 [Problems to be solved by this disclosure]
However, the pillar to which the radio wave sensor of Patent Document 1 is fixed is installed on the first sidewalk. Therefore, although the radio waves emitted from the radio wave sensor of Patent Document 1 can be irradiated to the crosswalk and the second pedestrian waiting area, the radio waves cannot be irradiated to the first pedestrian waiting area. The radio wave sensor of Patent Document 1 cannot detect pedestrians in the first pedestrian waiting area. In order to detect pedestrians in the first pedestrian waiting area, it is necessary to install another support on the second sidewalk and fix another radio wave sensor to this support. However, providing another support and another radio wave sensor increases the installation cost and installation space of the radio wave sensor.
　特許文献２の電波センサから放射される電波を、横断歩道及び第２歩行者待機エリアに加えて、第１歩行者待機エリアに照射するために、特許文献２の電波センサを、車道から大きく後退して配置する必要がある。そのため、電波センサの設置スペースが増加する。第１歩道のすぐそばに建物がある場合には、特許文献２の電波センサを設置することができない。また、特許文献２の電波センサを、第１歩道に設置されておりかつ自動車用信号機が固定されている支柱に固定すると、特許文献２の電波センサから放射される電波を第１歩行者待機エリアに照射することができなくなるため、特許文献２の電波センサを、第１歩道に設置されておりかつ自動車用信号機が固定されている支柱に固定することができない。すなわち、特許文献２の電波センサと自動車用信号機とは、支柱を共用することができない。そのため、自動車用信号機が固定されている支柱とは別の支柱を第１歩道に対して車道とは反対側に設置して、この別の支柱に特許文献２の電波センサを固定する必要がある。しかし、別の支柱を設けると、電波センサの設置コスト及び電波センサの設置スペースが増加する。 In order to irradiate the radio waves emitted from the radio wave sensor of Patent Document 2 to the first pedestrian waiting area in addition to the crosswalk and the second pedestrian waiting area, the radio wave sensor of Patent Document 2 is moved far back from the roadway. and place it. Therefore, the installation space for the radio wave sensor increases. If there is a building right next to the first sidewalk, the radio wave sensor of Patent Document 2 cannot be installed. Furthermore, when the radio wave sensor of Patent Document 2 is fixed to a pillar installed on the first sidewalk and to which a car traffic signal is fixed, the radio waves emitted from the radio wave sensor of Patent Document 2 can be transmitted to the first pedestrian waiting area. Therefore, the radio wave sensor of Patent Document 2 cannot be fixed to the pillar installed on the first sidewalk and to which the automobile traffic signal is fixed. That is, the radio wave sensor of Patent Document 2 and the automobile traffic signal cannot share a support. Therefore, it is necessary to install a different post from the one to which the automobile traffic signal is fixed on the opposite side of the roadway with respect to the first sidewalk, and to fix the radio wave sensor of Patent Document 2 to this different post. . However, providing another support increases the installation cost and installation space for the radio wave sensor.
　本開示は、上記の課題を鑑みてなされたものであり、その目的は、車道に対して電波センサが配置されている側にある歩行者待機エリアにいる歩行者を検出することができ、かつ、電波センサの設置コスト及び電波センサの設置スペースを減少させることができる電波センサを提供することである。 The present disclosure has been made in view of the above-mentioned problems, and its purpose is to be able to detect pedestrians in a pedestrian waiting area on the side where the radio wave sensor is arranged with respect to the roadway, and An object of the present invention is to provide a radio wave sensor that can reduce the installation cost and installation space of the radio wave sensor.
　[本開示の効果]
　本開示の第一局面及び第二局面の電波センサによれば、車道に対して電波センサが配置されている側にある歩行者待機エリアにいる歩行者を検出することができ、かつ、電波センサの設置コスト及び電波センサの設置スペースを減少させることができる。 [Effects of this disclosure]
According to the radio wave sensors of the first and second aspects of the present disclosure, it is possible to detect a pedestrian in a pedestrian waiting area on the side where the radio wave sensor is arranged with respect to the roadway, and the radio wave sensor The installation cost and the installation space of the radio wave sensor can be reduced.
　[本開示の実施形態の説明]
　最初に本開示の実施態様を列記して説明する。 [Description of embodiments of the present disclosure]
First, embodiments of the present disclosure will be listed and described.
　（１）本開示の電波センサ１は、第１アンテナ装置２０と、第２アンテナ装置２５とを備える。第１アンテナ装置２０は、第１歩行者待機エリア７に第１電波２３を送信する第１送信アンテナ２２を含む。第２アンテナ装置２５は、横断歩道３または第２歩行者待機エリア９の少なくとも一つに第２電波２８を送信する第２送信アンテナ２７を含む。第１歩行者待機エリア７は、電波センサ１が配置される歩道（第１歩道６）に含まれる。横断歩道３は、第１歩行者待機エリア７に隣接している。第２歩行者待機エリア９は、横断歩道３に対して第１歩行者待機エリア７とは反対側で、横断歩道３に隣接している。 (1) The radio wave sensor 1 of the present disclosure includes a first antenna device 20 and a second antenna device 25. The first antenna device 20 includes a first transmitting antenna 22 that transmits a first radio wave 23 to the first pedestrian waiting area 7 . The second antenna device 25 includes a second transmitting antenna 27 that transmits a second radio wave 28 to at least one of the crosswalk 3 and the second pedestrian waiting area 9. The first pedestrian waiting area 7 is included in the sidewalk (first sidewalk 6) where the radio wave sensor 1 is arranged. The crosswalk 3 is adjacent to the first pedestrian waiting area 7. The second pedestrian waiting area 9 is adjacent to the crosswalk 3 on the opposite side of the crosswalk 3 from the first pedestrian waiting area 7.
　第１アンテナ装置２０は第１送信アンテナ２２と第２送信アンテナ２７とを含むため、第１アンテナ装置２０を用いて、車道（第１車道２）に対して電波センサ１が配置されている側にある第１歩行者待機エリア７にいる歩行者を検出することができる。第１歩行者待機エリア７にいる歩行者を検出するために別の支柱及び別の電波センサを設ける必要がない。電波センサ１の設置コスト及び電波センサ１の設置スペースを減少させることができる。 Since the first antenna device 20 includes a first transmitting antenna 22 and a second transmitting antenna 27, the first antenna device 20 is used to transmit data on the side where the radio wave sensor 1 is arranged with respect to the roadway (first roadway 2). Pedestrians present in the first pedestrian waiting area 7 can be detected. There is no need to provide another support and another radio wave sensor to detect pedestrians in the first pedestrian waiting area 7. The installation cost of the radio wave sensor 1 and the installation space of the radio wave sensor 1 can be reduced.
　また、第１アンテナ装置２０と第２アンテナ装置２５とを用いて第１歩行者待機エリア７と横断歩道３または第２歩行者待機エリア９の少なくとも一つとにいる歩行者を検出しつつ、電波センサ１を車道（第１車道２）の近くに（例えば、第１歩道６の上方に）配置することができる。第１歩道６のすぐそばに建物があっても、電波センサ１を設置することができる。また、電波センサ１を、第１歩道６に設置されておりかつ自動車用信号機１１が固定されている支柱（第１支柱１０ａ）に固定することができる。すなわち、電波センサ１と自動車用信号機１１とは、支柱（第１支柱１０ａ）を共用することができる。そのため、電波センサ１の設置コスト及び電波センサ１の設置スペースを減少させることができる。 Further, while detecting pedestrians in the first pedestrian waiting area 7 and at least one of the crosswalk 3 or the second pedestrian waiting area 9 using the first antenna device 20 and the second antenna device 25, The sensor 1 can be arranged near the roadway (first roadway 2) (for example above the first sidewalk 6). Even if there is a building right next to the first sidewalk 6, the radio wave sensor 1 can be installed. Moreover, the radio wave sensor 1 can be fixed to a post (first post 10a) installed on the first sidewalk 6 and to which the automobile traffic signal 11 is fixed. That is, the radio wave sensor 1 and the automobile traffic signal 11 can share a support (first support 10a). Therefore, the installation cost of the radio wave sensor 1 and the installation space of the radio wave sensor 1 can be reduced.
　（２）上記（１）の電波センサ１では、第１電波２３を送信するために第１送信アンテナ２２に供給される第１送信電力は、第２電波２８を送信するために第２送信アンテナ２７に供給される第２送信電力に等しいまたはよりも小さい。 (2) In the radio wave sensor 1 of (1) above, the first transmission power supplied to the first transmission antenna 22 for transmitting the first radio wave 23 is the same as the first transmission power supplied to the second transmission antenna 22 for transmitting the second radio wave 28. 27.
　第１歩行者待機エリア７は、横断歩道３及び第２歩行者待機エリア９よりも電波センサ１の近くにある。そのため、第１送信アンテナ２２に供給される第１送信電力が第２送信アンテナ２７に供給される第２送信電力に等しいまたはよりも小さくても、第１歩行者待機エリア７にいる歩行者を検出することができる。 The first pedestrian waiting area 7 is located closer to the radio wave sensor 1 than the crosswalk 3 and the second pedestrian waiting area 9. Therefore, even if the first transmission power supplied to the first transmission antenna 22 is equal to or smaller than the second transmission power supplied to the second transmission antenna 27, pedestrians in the first pedestrian waiting area 7 can be can be detected.
　（３）上記（１）または（２）の電波センサ１では、第１送信アンテナ２２は、第１送信アンテナ素子２２ａを含む。第２送信アンテナ２７は、第２送信アンテナ素子２７ａを含む。第１送信アンテナ素子２２ａの数は、第２送信アンテナ素子２７ａの数よりも少ない。 (3) In the radio wave sensor 1 of (1) or (2) above, the first transmitting antenna 22 includes the first transmitting antenna element 22a. The second transmitting antenna 27 includes a second transmitting antenna element 27a. The number of first transmitting antenna elements 22a is smaller than the number of second transmitting antenna elements 27a.
　そのため、第１電波２３の第１拡がり角θ１を、第２電波２８の第２拡がり角θ２よりも大きくすることができる。 Therefore, the first spread angle θ 1 of the first radio wave 23 can be made larger than the second spread angle θ 2 of the second radio wave 28 .
　（４）上記（１）から（３）のいずれかの電波センサ１では、第１アンテナ装置２０は、第１主面２１ａを含む第１アンテナ基板２１を含む。第１送信アンテナ２２は、第１主面２１ａ上に搭載されている。第２アンテナ装置２５は、第２主面２６ａを含む第２アンテナ基板２６を含む。第２送信アンテナ２７は、第２主面２６ａ上に搭載されている。 (4) In the radio wave sensor 1 according to any one of (1) to (3) above, the first antenna device 20 includes the first antenna substrate 21 including the first main surface 21a. The first transmitting antenna 22 is mounted on the first main surface 21a. The second antenna device 25 includes a second antenna substrate 26 including a second main surface 26a. The second transmitting antenna 27 is mounted on the second main surface 26a.
　第１アンテナ装置２０は第１送信アンテナ２２と第２送信アンテナ２７とを含むため、第１アンテナ装置２０を用いて、車道（第１車道２）に対して電波センサ１が配置されている側にある第１歩行者待機エリア７にいる歩行者を検出することができる。第１歩道６のすぐそばに建物があっても、電波センサ１を設置することができる。電波センサ１と自動車用信号機１１とは、支柱（第１支柱１０ａ）を共用することができる。こうして、電波センサ１の設置コスト及び電波センサ１の設置スペースを減少させることができる。 Since the first antenna device 20 includes a first transmitting antenna 22 and a second transmitting antenna 27, the first antenna device 20 is used to transmit data on the side where the radio wave sensor 1 is arranged with respect to the roadway (first roadway 2). Pedestrians present in the first pedestrian waiting area 7 can be detected. Even if there is a building right next to the first sidewalk 6, the radio wave sensor 1 can be installed. The radio wave sensor 1 and the automobile traffic signal 11 can share a support (first support 10a). In this way, the installation cost of the radio wave sensor 1 and the installation space of the radio wave sensor 1 can be reduced.
　（５）上記（４）の電波センサ１は、第１角度調整器５１または第２角度調整器５６の少なくとも一つをさらに備える。第１角度調整器５１は、第１主面２１ａの第１の向きを調整可能である。第２角度調整器５６は、第２主面２６ａの第２の向きを調整可能である。 (5) The radio wave sensor 1 of (4) above further includes at least one of the first angle adjuster 51 or the second angle adjuster 56. The first angle adjuster 51 can adjust the first direction of the first main surface 21a. The second angle adjuster 56 can adjust the second direction of the second main surface 26a.
　第１角度調整器５１によって、第１電波２３の第１進行方向２３ａを調整することができる。第２角度調整器５６によって、第２電波２８の第２進行方向２８ａを調整することができる。そのため、第１歩行者待機エリア７のサイズ、横断歩道３のサイズ及び第２歩行者待機エリア９のサイズ、並びに、電波センサ１に対する第１歩行者待機エリア７の位置、電波センサ１に対する横断歩道３の位置及び電波センサ１に対する第２歩行者待機エリア９の位置が様々であっても、電波センサ１が適用可能である。 The first direction of travel 23a of the first radio wave 23 can be adjusted by the first angle adjuster 51. The second angle adjuster 56 can adjust the second traveling direction 28a of the second radio wave 28. Therefore, the size of the first pedestrian waiting area 7, the size of the crosswalk 3, the size of the second pedestrian waiting area 9, the position of the first pedestrian waiting area 7 with respect to the radio wave sensor 1, and the crosswalk with respect to the radio wave sensor 1 are determined. The radio wave sensor 1 can be applied even if the position of the second pedestrian waiting area 9 with respect to the radio wave sensor 1 and the position of the second pedestrian waiting area 9 with respect to the radio wave sensor 1 vary.
　また、第１角度調整器５１によって、第１歩行者待機エリア７のサイズ及び電波センサ１に対する第１歩行者待機エリア７の位置などに応じて、第１電波２３の第１進行方向２３ａを最適化することができる。第１歩行者待機エリア７にいる歩行者をより確実に検出することができる。第２角度調整器５６によって、横断歩道３のサイズ、電波センサ１に対する横断歩道３の位置、第２歩行者待機エリア９のサイズ及び電波センサ１に対する第２歩行者待機エリア９の位置などに応じて、第２電波２８の第２進行方向２８ａを最適化することができる。横断歩道３または第２歩行者待機エリア９の少なくとも一つにいる歩行者をより確実に検出することができる。 Further, the first angle adjuster 51 optimizes the first traveling direction 23a of the first radio wave 23 according to the size of the first pedestrian waiting area 7 and the position of the first pedestrian waiting area 7 with respect to the radio wave sensor 1. can be converted into Pedestrians in the first pedestrian waiting area 7 can be detected more reliably. The second angle adjuster 56 adjusts the angle according to the size of the crosswalk 3, the position of the crosswalk 3 with respect to the radio wave sensor 1, the size of the second pedestrian waiting area 9, the position of the second pedestrian waiting area 9 with respect to the radio wave sensor 1, etc. Thus, the second traveling direction 28a of the second radio wave 28 can be optimized. Pedestrians present at at least one of the crosswalk 3 or the second pedestrian waiting area 9 can be detected more reliably.
　（６）上記（１）から（５）のいずれかの電波センサ１は、第１アンテナ装置２０と第２アンテナ装置２５とを収容する筐体３０をさらに備える。 (6) The radio wave sensor 1 according to any one of (1) to (5) above further includes a housing 30 that houses the first antenna device 20 and the second antenna device 25.
　筐体３０は、第１アンテナ装置２０と第２アンテナ装置２５とを、雨、風及び塵埃などから保護する。そのため、電波センサ１の寿命が伸びる。 The housing 30 protects the first antenna device 20 and the second antenna device 25 from rain, wind, dust, and the like. Therefore, the life of the radio wave sensor 1 is extended.
　（７）上記（６）の電波センサ１では、筐体３０は、ベース板３１と、ベース板３１に固定されているレドーム３２とを含む。 (7) In the radio wave sensor 1 of (6) above, the housing 30 includes a base plate 31 and a radome 32 fixed to the base plate 31.
　筐体３０は、第１アンテナ装置２０と第２アンテナ装置２５とを、雨、風及び塵埃などから保護する。そのため、電波センサ１の寿命が伸びる。 The housing 30 protects the first antenna device 20 and the second antenna device 25 from rain, wind, dust, and the like. Therefore, the life of the radio wave sensor 1 is extended.
　（８）上記（７）の電波センサ１では、筐体３０は、封止部材３６をさらに含む。封止部材３６は、ベース板３１とレドーム３２との間に配置されており、かつ、ベース板３１とレドーム３２との間を封止する。 (8) In the radio wave sensor 1 of (7) above, the housing 30 further includes a sealing member 36. The sealing member 36 is disposed between the base plate 31 and the radome 32 and seals between the base plate 31 and the radome 32.
　封止部材３６は、雨、風及び塵埃などが、第１アンテナ装置２０及び第２アンテナ装置２５が収容される収容空間３０ａに侵入することを、より確実に防ぐ。そのため、電波センサ１の寿命が伸びる。 The sealing member 36 more reliably prevents rain, wind, dust, etc. from entering the accommodation space 30a where the first antenna device 20 and the second antenna device 25 are accommodated. Therefore, the life of the radio wave sensor 1 is extended.
　（９）上記（６）の電波センサ１では、筐体３０は、ケース３７と、第１窓部材３８と、第２窓部材３９とを含む。ケース３７には、第１開口３７ｃと、第２開口３７ｄとが設けられている。第１窓部材３８は、ケース３７に固定されており、第１開口３７ｃを閉塞しており、かつ、第１アンテナ装置２０に対向している。第２窓部材３９は、ケース３７に固定されており、第２開口３７ｄを閉塞しており、かつ、第２アンテナ装置２５に対向している。 (9) In the radio wave sensor 1 of (6) above, the housing 30 includes a case 37, a first window member 38, and a second window member 39. The case 37 is provided with a first opening 37c and a second opening 37d. The first window member 38 is fixed to the case 37, closes the first opening 37c, and faces the first antenna device 20. The second window member 39 is fixed to the case 37, closes the second opening 37d, and faces the second antenna device 25.
　筐体３０は、第１アンテナ装置２０と第２アンテナ装置２５とを、雨、風及び塵埃などから保護する。そのため、電波センサ１の寿命が伸びる。 The housing 30 protects the first antenna device 20 and the second antenna device 25 from rain, wind, dust, and the like. Therefore, the life of the radio wave sensor 1 is extended.
　（１０）上記（９）の電波センサ１では、筐体３０は、第１封止部材３６ａと、第２封止部材３６ｂとをさらに含む。第１封止部材３６ａは、ケース３７と第１窓部材３８との間に配置されており、かつ、ケース３７と第１窓部材３８との間を封止する。第２封止部材３６ｂは、ケース３７と第２窓部材３９との間に配置されており、かつ、ケース３７と第２窓部材３９との間を封止する。 (10) In the radio wave sensor 1 of (9) above, the housing 30 further includes a first sealing member 36a and a second sealing member 36b. The first sealing member 36a is disposed between the case 37 and the first window member 38, and seals between the case 37 and the first window member 38. The second sealing member 36b is disposed between the case 37 and the second window member 39, and seals between the case 37 and the second window member 39.
　第１封止部材３６ａ及び第２封止部材３６ｂは、雨、風及び塵埃などが、第１アンテナ装置２０及び第２アンテナ装置２５が収容される収容空間３０ａに侵入することを、より確実に防ぐ。そのため、電波センサ１の寿命が伸びる。 The first sealing member 36a and the second sealing member 36b more reliably prevent rain, wind, dust, etc. from entering the accommodation space 30a in which the first antenna device 20 and the second antenna device 25 are accommodated. prevent. Therefore, the life of the radio wave sensor 1 is extended.
　[本開示の実施形態の詳細]
　（実施形態１）
　図１から図４を参照して、実施形態１の電波センサ１を説明する。 [Details of embodiments of the present disclosure]
(Embodiment 1)
A radio wave sensor 1 according to a first embodiment will be described with reference to FIGS. 1 to 4.
　図１及び図２に示されるように、電波センサ１は、第１歩道６の上方に配置される。電波センサ１は、第１歩道６のうち交差点５の近くの部分の上方に配置されてもよい。交差点５は、第１車道２と第２車道４とが互いに交差する部分である。自動車またはバイクなどが、第１車道２及び第２車道４を走行する。第１歩道６と第２歩道８とは、第１車道２に沿って設けられている。歩行者は、第１歩道６と第２歩道８とを歩く。第１歩道６は、第１車道２に対して、第１車道２の幅方向の一方側に配置されている。第２歩道８は、第１車道２に対して、第１車道２の幅方向の他方側に配置されている。 As shown in FIGS. 1 and 2, the radio wave sensor 1 is placed above the first sidewalk 6. The radio wave sensor 1 may be placed above a portion of the first sidewalk 6 near the intersection 5. The intersection 5 is a portion where the first roadway 2 and the second roadway 4 intersect with each other. A car, a motorcycle, or the like runs on the first roadway 2 and the second roadway 4. The first sidewalk 6 and the second sidewalk 8 are provided along the first roadway 2. Pedestrians walk on the first sidewalk 6 and the second sidewalk 8. The first sidewalk 6 is arranged on one side of the first roadway 2 in the width direction of the first roadway 2. The second sidewalk 8 is arranged on the other side of the first roadway 2 in the width direction of the first roadway 2 .
　横断歩道３が、第１車道２に設置されている。本実施形態では、横断歩道３は交差点５の近くに設置されている。横断歩道３は、第１車道２のうち交差点５が設けられていない場所に設置されてもよい。 A crosswalk 3 is installed on the first roadway 2. In this embodiment, the crosswalk 3 is installed near the intersection 5. The crosswalk 3 may be installed at a location on the first roadway 2 where the intersection 5 is not provided.
　第１歩道６は、第１歩行者待機エリア７を含む。第２歩道８は、第２歩行者待機エリア９を含む。横断歩道３は、第１歩行者待機エリア７に隣接している。第２歩行者待機エリア９は、横断歩道３に対して第１歩行者待機エリア７とは反対側で、横断歩道３に隣接している。第１歩行者待機エリア７は、第２歩行者用信号機１３ｂが停止指示を表示（例えば、赤信号を点灯）している時に、歩行者が待機するエリアである。第２歩行者待機エリア９は、第１歩行者用信号機１３ａが停止指示を表示（例えば、赤信号を点灯）している時に、歩行者が待機するエリアである。本明細書において、歩行者は、歩いている人間に限定されず、走っている人間及び自転車に乗っている人間等を含む。 The first sidewalk 6 includes a first pedestrian waiting area 7. The second sidewalk 8 includes a second pedestrian waiting area 9. The crosswalk 3 is adjacent to the first pedestrian waiting area 7. The second pedestrian waiting area 9 is adjacent to the crosswalk 3 on the opposite side of the crosswalk 3 from the first pedestrian waiting area 7. The first pedestrian waiting area 7 is an area where pedestrians wait when the second pedestrian traffic light 13b displays a stop instruction (for example, lights up a red light). The second pedestrian waiting area 9 is an area where pedestrians wait when the first pedestrian traffic light 13a displays a stop instruction (for example, lights up a red light). In this specification, a pedestrian is not limited to a person walking, but includes a person running, a person riding a bicycle, and the like.
　第１支柱１０ａが、第１歩道６に設置されている。第１支柱１０ａは、第１歩行者待機エリア７に設けられてもよい。第１支柱１０ａに、自動車用信号機１１と、第１歩行者用信号機１３ａと、電波センサ１とが設けられている。 A first support 10a is installed on the first sidewalk 6. The first pillar 10a may be provided in the first pedestrian waiting area 7. An automobile traffic light 11, a first pedestrian traffic light 13a, and a radio wave sensor 1 are provided on the first support 10a.
　自動車用信号機１１は、第１車道２を走行する自動車の運転手に、走行指示または停止指示を表示（例えば、青信号または赤信号を点灯）する。自動車用信号機１１は、アーム１２を介して、第１支柱１０ａに固定されている。自動車用信号機１１は、第１支柱１０ａに直接固定されてもよい。第１歩行者用信号機１３ａは、第２歩行者待機エリア９において待機している歩行者に、歩行指示または停止指示を表示（例えば、青信号または赤信号を点灯）する。第１歩行者用信号機１３ａは、第１支柱１０ａに直接固定されている。第１歩行者用信号機１３ａは、アーム（図示せず）を介して、第１支柱１０ａに固定されてもよい。電波センサ１は、アーム１４を介して、第１支柱１０ａに固定されている。電波センサ１は、第１支柱１０ａに直接固定されてもよい。 The automobile traffic light 11 displays a drive instruction or a stop instruction (for example, turns on a green light or a red light) to the driver of a car traveling on the first roadway 2. The automobile traffic signal 11 is fixed to the first support column 10a via an arm 12. The automobile traffic signal 11 may be directly fixed to the first support column 10a. The first pedestrian traffic light 13a displays a walking instruction or a stop instruction to pedestrians waiting in the second pedestrian waiting area 9 (for example, by lighting a green light or a red light). The first pedestrian traffic light 13a is directly fixed to the first support column 10a. The first pedestrian traffic light 13a may be fixed to the first support column 10a via an arm (not shown). The radio wave sensor 1 is fixed to the first support 10a via the arm 14. The radio wave sensor 1 may be directly fixed to the first support column 10a.
　第２支柱１０ｂが、第２歩道８に設置されている。第２支柱１０ｂは、第２歩行者待機エリア９に設けられてもよい。第２支柱１０ｂに、第２歩行者用信号機１３ｂが設けられている。第２歩行者用信号機１３ｂは、第１歩行者待機エリア７において待機している歩行者に、歩行指示または停止指示を表示（例えば、青信号または赤信号を点灯）する。第２歩行者用信号機１３ｂは、第２支柱１０ｂに直接固定されている。第２歩行者用信号機１３ｂは、アーム（図示せず）を介して、第２支柱１０ｂに固定されてもよい。 A second support post 10b is installed on the second sidewalk 8. The second pillar 10b may be provided in the second pedestrian waiting area 9. A second pedestrian traffic light 13b is provided on the second pillar 10b. The second pedestrian traffic light 13b displays a walking instruction or a stop instruction to pedestrians waiting in the first pedestrian waiting area 7 (for example, by lighting a green light or a red light). The second pedestrian traffic light 13b is directly fixed to the second support column 10b. The second pedestrian traffic light 13b may be fixed to the second support column 10b via an arm (not shown).
　図１から図４に示されるように、電波センサ１は、第１アンテナ装置２０と、第２アンテナ装置２５と、筐体３０と、コントローラ４１とを主に備える。 As shown in FIGS. 1 to 4, the radio wave sensor 1 mainly includes a first antenna device 20, a second antenna device 25, a housing 30, and a controller 41.
　図３に示されるように、第１アンテナ装置２０は、第１アンテナ基板２１と、第１送信アンテナ２２と、第１受信アンテナ２４とを含む。第１アンテナ基板２１は、第１主面２１ａを含む。 As shown in FIG. 3, the first antenna device 20 includes a first antenna substrate 21, a first transmitting antenna 22, and a first receiving antenna 24. The first antenna substrate 21 includes a first main surface 21a.
　第１送信アンテナ２２は、第１電波２３を放射する。具体的には、第１送信アンテナ２２は、第１送信アンテナ素子２２ａを含む。第１送信アンテナ素子２２ａは、第１主面２１ａ上に搭載されている。第１送信アンテナ２２に第１送信電力を供給することによって、第１送信アンテナ素子２２ａは電波を放射する。第１送信アンテナ素子２２ａから放射される電波が合成されて、第１電波２３になる。図２に示されるように、第１送信アンテナ２２は、第１電波２３で照射領域１６を照射する。照射領域１６は、第１歩行者待機エリア７を含む。第１送信アンテナ２２は、第１歩行者待機エリア７に第１電波２３を送信する。第１電波２３は、例えば、ミリ波である。 The first transmitting antenna 22 emits a first radio wave 23. Specifically, the first transmitting antenna 22 includes a first transmitting antenna element 22a. The first transmitting antenna element 22a is mounted on the first main surface 21a. By supplying the first transmission power to the first transmission antenna 22, the first transmission antenna element 22a radiates radio waves. The radio waves radiated from the first transmitting antenna element 22a are combined to become the first radio wave 23. As shown in FIG. 2, the first transmitting antenna 22 irradiates the irradiation area 16 with the first radio wave 23. The irradiation area 16 includes the first pedestrian waiting area 7. The first transmitting antenna 22 transmits a first radio wave 23 to the first pedestrian waiting area 7. The first radio wave 23 is, for example, a millimeter wave.
　第１電波２３は、第１拡がり角θ１で拡がりながら、第１歩行者待機エリア７に向けて進む。第１拡がり角θ１は、例えば、７２°以上１６８°以下である。第１電波２３の第１進行方向２３ａは、第１主面２１ａの第１法線２１ｂの方向であってもよいし、第１主面２１ａの第１法線２１ｂから傾いてもよい。第１電波２３の第１進行方向２３ａは、第１電波２３の第１拡がり角θ１の中心方向である。 The first radio wave 23 advances toward the first pedestrian waiting area 7 while spreading at a first spread angle θ1 . The first divergence angle θ 1 is, for example, 72° or more and 168° or less. The first traveling direction 23a of the first radio wave 23 may be the direction of the first normal 21b of the first main surface 21a, or may be inclined from the first normal 21b of the first main surface 21a. The first traveling direction 23a of the first radio wave 23 is the center direction of the first spread angle θ 1 of the first radio wave 23.
　第１受信アンテナ２４は、第１歩行者待機エリア７にいる歩行者によって反射された第１電波２３を受信する。具体的には、第１受信アンテナ２４は、第１受信アンテナ素子２４ａを含む。第１受信アンテナ素子２４ａは、第１主面２１ａ上に搭載されている。第１受信アンテナ素子２４ａは、第１歩行者待機エリア７にいる歩行者によって反射された第１電波２３を受信する。第１受信アンテナ２４は、コントローラ４１（具体的には、第１制御部４２）に、第１信号を送信する。 The first receiving antenna 24 receives the first radio waves 23 reflected by pedestrians in the first pedestrian waiting area 7. Specifically, the first receiving antenna 24 includes a first receiving antenna element 24a. The first receiving antenna element 24a is mounted on the first main surface 21a. The first receiving antenna element 24a receives the first radio waves 23 reflected by pedestrians in the first pedestrian waiting area 7. The first receiving antenna 24 transmits a first signal to the controller 41 (specifically, the first control unit 42).
　図３に示されるように、第２アンテナ装置２５は、第２アンテナ基板２６と、第２送信アンテナ２７と、第２受信アンテナ２９とを含む。第２アンテナ基板２６は、第２主面２６ａを含む。 As shown in FIG. 3, the second antenna device 25 includes a second antenna substrate 26, a second transmitting antenna 27, and a second receiving antenna 29. The second antenna substrate 26 includes a second main surface 26a.
　第２送信アンテナ２７は、第２電波２８を放射する。具体的には、第２送信アンテナ２７は、第２送信アンテナ素子２７ａを含む。第２送信アンテナ素子２７ａは、第２主面２６ａ上に搭載されている。第２送信アンテナ２７に第２送信電力を供給することによって、第２送信アンテナ素子２７ａは電波を放射する。第２送信アンテナ素子２７ａから放射される電波が合成されて、第２電波２８になる。図２に示されるように、第２送信アンテナ２７は、第２電波２８で、照射領域１７と照射領域１８とを照射する。照射領域１７は、横断歩道３を含む。照射領域１８は、第２歩行者待機エリア９を含む。第２送信アンテナ２７は、横断歩道３と第２歩行者待機エリア９とに第２電波２８を送信する。照射領域１７は、例えば、照射領域１６と照射領域１８とにつながっている。照射領域１７の一部は、照射領域１６に重なってもよい。照射領域１７の一部は、照射領域１８に重なってもよい。第２電波２８は、例えば、ミリ波である。 The second transmitting antenna 27 emits a second radio wave 28. Specifically, the second transmitting antenna 27 includes a second transmitting antenna element 27a. The second transmitting antenna element 27a is mounted on the second main surface 26a. By supplying the second transmission power to the second transmission antenna 27, the second transmission antenna element 27a radiates radio waves. Radio waves radiated from the second transmitting antenna element 27a are combined to become a second radio wave 28. As shown in FIG. 2, the second transmitting antenna 27 irradiates the irradiation area 17 and the irradiation area 18 with a second radio wave 28. The irradiation area 17 includes the crosswalk 3. The irradiation area 18 includes a second pedestrian waiting area 9. The second transmitting antenna 27 transmits a second radio wave 28 to the crosswalk 3 and the second pedestrian waiting area 9. The irradiation area 17 is connected to the irradiation area 16 and the irradiation area 18, for example. A portion of the irradiation area 17 may overlap the irradiation area 16. A part of the irradiation area 17 may overlap the irradiation area 18. The second radio wave 28 is, for example, a millimeter wave.
　第２送信アンテナ２７は、第２電波２８で、照射領域１７のみを照射してもよい。すなわち、第２送信アンテナ２７は、第２歩行者待機エリア９に第２電波２８を送信せずに、横断歩道３に第２電波２８を送信してもよい。第２送信アンテナ２７は、第２電波２８で、照射領域１８のみを照射してもよい。すなわち、第２送信アンテナ２７は、横断歩道３に第２電波２８を送信せずに、第２歩行者待機エリア９に第２電波２８を送信してもよい。要するに、第２送信アンテナ２７は、第２電波２８で、照射領域１７または照射領域１８の少なくとも一つを照射すればよい。すなわち、第２送信アンテナ２７は、横断歩道３または第２歩行者待機エリア９の少なくとも一つに第２電波２８を送信すればよい。本明細書において、照射領域１７または照射領域１８の少なくとも一つは、照射領域１７、照射領域１８、または、照射領域１７及び照射領域１８を意味する。横断歩道３または第２歩行者待機エリア９の少なくとも一つは、横断歩道３、第２歩行者待機エリア９、または、横断歩道３及び第２歩行者待機エリア９を意味する。 The second transmitting antenna 27 may irradiate only the irradiation area 17 with the second radio wave 28. That is, the second transmitting antenna 27 may transmit the second radio wave 28 to the crosswalk 3 without transmitting the second radio wave 28 to the second pedestrian waiting area 9. The second transmitting antenna 27 may irradiate only the irradiation area 18 with the second radio wave 28 . That is, the second transmitting antenna 27 may transmit the second radio wave 28 to the second pedestrian waiting area 9 without transmitting the second radio wave 28 to the crosswalk 3. In short, the second transmitting antenna 27 may irradiate at least one of the irradiation area 17 or the irradiation area 18 with the second radio wave 28 . That is, the second transmitting antenna 27 may transmit the second radio wave 28 to at least one of the crosswalk 3 and the second pedestrian waiting area 9. In this specification, at least one of the irradiation area 17 or the irradiation area 18 means the irradiation area 17, the irradiation area 18, or the irradiation area 17 and the irradiation area 18. At least one of the crosswalk 3 or the second pedestrian waiting area 9 means the crosswalk 3, the second pedestrian waiting area 9, or the crosswalk 3 and the second pedestrian waiting area 9.
　第２電波２８は、第２拡がり角θ２で拡がりながら、横断歩道３または第２歩行者待機エリア９の少なくとも一つに向けて進む。第２拡がり角θ２は、例えば、５０°以上６３°以下である。第２電波２８の第２進行方向２８ａは、第２主面２６ａの第２法線２６ｂの方向であってもよいし、第２主面２６ａの第２法線２６ｂから傾いてもよい。第２電波２８の第２進行方向２８ａは、第２電波２８の第２拡がり角θ２の中心方向である。 The second radio wave 28 travels toward at least one of the crosswalk 3 and the second pedestrian waiting area 9 while spreading at a second spread angle θ 2 . The second divergence angle θ 2 is, for example, 50° or more and 63° or less. The second traveling direction 28a of the second radio wave 28 may be in the direction of the second normal 26b of the second main surface 26a, or may be inclined from the second normal 26b of the second main surface 26a. The second traveling direction 28a of the second radio wave 28 is the center direction of the second spread angle θ 2 of the second radio wave 28.
　第２受信アンテナ２９は、横断歩道３または第２歩行者待機エリア９の少なくとも一つにいる歩行者によって反射された第２電波２８を受信する。具体的には、第２受信アンテナ２９は、第２受信アンテナ素子２９ａを含む。第２受信アンテナ素子２９ａは、第２主面２６ａ上に搭載されている。第２受信アンテナ素子２９ａは、横断歩道３または第２歩行者待機エリア９の少なくとも一つにいる歩行者によって反射された第２電波２８を受信する。第２受信アンテナ２９は、コントローラ４１（具体的には、第２制御部４３）に、第２信号を送信する。 The second receiving antenna 29 receives the second radio waves 28 reflected by pedestrians on at least one of the crosswalk 3 or the second pedestrian waiting area 9. Specifically, the second receiving antenna 29 includes a second receiving antenna element 29a. The second receiving antenna element 29a is mounted on the second main surface 26a. The second receiving antenna element 29a receives the second radio wave 28 reflected by a pedestrian on at least one of the crosswalk 3 or the second pedestrian waiting area 9. The second receiving antenna 29 transmits a second signal to the controller 41 (specifically, the second control section 43).
　図１及び図２に示されるように、電波センサ１と第１歩行者待機エリア７との間の第１距離は、電波センサ１と横断歩道３または第２歩行者待機エリア９の少なくとも一つとの間の第２距離より短い。そのため、第１送信アンテナ２２に供給される第１送信電力は、第２送信アンテナ２７に供給される第２送信電力に等しくてもよいし、第２送信電力よりも小さくてもよい。 As shown in FIGS. 1 and 2, the first distance between the radio sensor 1 and the first pedestrian waiting area 7 is the distance between the radio sensor 1 and at least one of the crosswalk 3 or the second pedestrian waiting area 9. shorter than the second distance between. Therefore, the first transmission power supplied to the first transmission antenna 22 may be equal to the second transmission power supplied to the second transmission antenna 27, or may be smaller than the second transmission power.
　送信アンテナ素子の数が増加すると、送信アンテナ素子のそれぞれから放射される電波の位相を調整することによって、送信アンテナから送信される電波の指向性を向上させることができて、当該電波の拡がり角は減少する。これに対し、送信アンテナ素子の数が減少すると、送信アンテナから送信される電波の指向性を向上させることができず、当該電波の拡がり角は増加する。そこで、例えば、図３に示されるように、第１送信アンテナ素子２２ａの数を第２送信アンテナ素子２７ａの数よりも少なくすることによって、第１電波２３の第１拡がり角θ１を、第２電波２８の第２拡がり角θ２よりも大きくしてもよい。 When the number of transmitting antenna elements increases, the directivity of the radio waves transmitted from the transmitting antenna can be improved by adjusting the phase of the radio waves emitted from each transmitting antenna element, and the spread angle of the radio waves can be improved. decreases. On the other hand, when the number of transmitting antenna elements decreases, the directivity of radio waves transmitted from the transmitting antenna cannot be improved, and the spread angle of the radio waves increases. Therefore, for example, as shown in FIG. 3, by making the number of first transmitting antenna elements 22a smaller than the number of second transmitting antenna elements 27a, the first spread angle θ 1 of the first radio wave 23 is The second spread angle θ of the two radio waves 28 may be larger than 2 .
　図３に示されるように、筐体３０は、第１アンテナ装置２０と第２アンテナ装置２５とを収容する。筐体３０は、ベース板３１と、レドーム３２と、固定部材３５とを含む。ベース板３１とレドーム３２とによって収容空間３０ａが形成される。第１アンテナ装置２０と第２アンテナ装置２５とは、収容空間３０ａ内に収容される。筐体３０は、封止部材３６をさらに含んでもよい。 As shown in FIG. 3, the housing 30 accommodates the first antenna device 20 and the second antenna device 25. The housing 30 includes a base plate 31, a radome 32, and a fixing member 35. A housing space 30a is formed by the base plate 31 and the radome 32. The first antenna device 20 and the second antenna device 25 are housed in the housing space 30a. The housing 30 may further include a sealing member 36.
　ベース板３１は、例えば、金属で形成されている。ベース板３１は、第１電波２３及び第２電波２８を透過させない材料で形成されてもよい。ベース板３１は、レドーム３２に対向する主面３１ａを含む。レドーム３２は、第１電波２３及び第２電波２８を透過させる材料（例えば、樹脂）で形成されている。レドーム３２は、固定部材３５を用いて、ベース板３１に固定されている。具体的には、レドーム３２は、ベース板３１の主面３１ａに対向するフランジ３２ａを含む。固定部材３５は、例えば、ねじである。レドーム３２のフランジ３２ａは、固定部材３５を用いて、ベース板３１に締結される。 The base plate 31 is made of metal, for example. The base plate 31 may be formed of a material that does not allow the first radio waves 23 and the second radio waves 28 to pass through. The base plate 31 includes a main surface 31a facing the radome 32. The radome 32 is made of a material (for example, resin) that transmits the first radio wave 23 and the second radio wave 28 . The radome 32 is fixed to the base plate 31 using a fixing member 35. Specifically, the radome 32 includes a flange 32a facing the main surface 31a of the base plate 31. The fixing member 35 is, for example, a screw. The flange 32a of the radome 32 is fastened to the base plate 31 using a fixing member 35.
　封止部材３６は、ベース板３１とレドーム３２との間を封止する。封止部材３６は、ベース板３１とレドーム３２との間に配置されている。封止部材３６は、ベース板３１の主面３１ａとレドーム３２のフランジ３２ａとの間に配置されている。封止部材３６は、例えば、Ｏリングである。 The sealing member 36 seals between the base plate 31 and the radome 32. The sealing member 36 is arranged between the base plate 31 and the radome 32. The sealing member 36 is arranged between the main surface 31a of the base plate 31 and the flange 32a of the radome 32. The sealing member 36 is, for example, an O-ring.
　図４を参照して、コントローラ４１は、第１アンテナ装置２０と、第２アンテナ装置２５と、交通安全支援システム４０に含まれる信号送信器４５とを制御する。コントローラ４１は、例えば、筐体３０に収容されてもよい。コントローラ４１は、筐体３０の外に配置されてもよく、例えば、第１支柱１０ａなどに固定されてもよい。 Referring to FIG. 4, controller 41 controls first antenna device 20, second antenna device 25, and signal transmitter 45 included in traffic safety support system 40. The controller 41 may be housed in the housing 30, for example. The controller 41 may be placed outside the housing 30, and may be fixed to the first support 10a, for example.
　コントローラ４１は、例えば、プロセッサと、ＲＡＭ（Random　Access　Memory）と、ＲＯＭ（Read　Only　Memory）のような記憶装置とを含むマイクロコンピュータである。プロセッサとして、例えば、ＣＰＵ（Central　Processing　Unit）が採用され得る。ＲＡＭは、プロセッサによって処理されるデータを一時的に記憶する作業用メモリとして機能する。記憶装置には、例えば、プロセッサで実行されるプログラムなどが記憶されている。本実施形態では、記憶装置に記憶されているプログラムをプロセッサが実行することで、コントローラ４１は、第１アンテナ装置２０と、第２アンテナ装置２５と、信号送信器４５とを制御する。マイクロコンピュータに代えて、ＦＰＧＡ（Field－Programmable　Gate　Array）が、コントローラ４１として採用されてもよい。コントローラ４１における各種処理は、ソフトウェアによって実行されることに限られず、専用のハードウェア（電子回路）によって実行されてもよい。 The controller 41 is, for example, a microcomputer that includes a processor, a storage device such as a RAM (Random Access Memory), and a ROM (Read Only Memory). For example, a CPU (Central Processing Unit) may be employed as the processor. RAM functions as a working memory that temporarily stores data processed by the processor. The storage device stores, for example, programs executed by a processor. In this embodiment, the controller 41 controls the first antenna device 20, the second antenna device 25, and the signal transmitter 45 by the processor executing a program stored in the storage device. Instead of a microcomputer, an FPGA (Field-Programmable Gate Array) may be employed as the controller 41. Various processes in the controller 41 are not limited to being executed by software, and may be executed by dedicated hardware (electronic circuit).
　コントローラ４１は、例えば、第１制御部４２と、第２制御部４３と、第３制御部４４とを含む。第１制御部４２は、第１アンテナ装置２０を制御する。第２制御部４３は、第２アンテナ装置２５を制御する。第３制御部４４は、信号送信器４５を制御する。 The controller 41 includes, for example, a first control section 42, a second control section 43, and a third control section 44. The first control unit 42 controls the first antenna device 20. The second control unit 43 controls the second antenna device 25. The third control section 44 controls the signal transmitter 45.
　具体的には、第１制御部４２は、第１送信アンテナ２２を制御して、第１送信アンテナ２２に第１電波２３を第１歩行者待機エリア７に向けて放射させる。第１制御部４２は、第１受信アンテナ２４から第１信号を受信する。第１制御部４２は、第１信号を処理して、第１歩行者待機エリア７に歩行者がいるときに第１歩行者検出信号を第３制御部４４に出力する。 Specifically, the first control unit 42 controls the first transmitting antenna 22 to cause the first transmitting antenna 22 to radiate the first radio wave 23 toward the first pedestrian waiting area 7 . The first control unit 42 receives the first signal from the first receiving antenna 24. The first control unit 42 processes the first signal and outputs a first pedestrian detection signal to the third control unit 44 when a pedestrian is present in the first pedestrian waiting area 7 .
　第２制御部４３は、第２送信アンテナ２７を制御して、第２送信アンテナ２７に第２電波２８を横断歩道３または第２歩行者待機エリア９の少なくとも一つに向けて放射させる。第２制御部４３は、第２受信アンテナ２９から第２信号を受信する。第２制御部４３は、第２信号を処理して、第２歩行者待機エリア９に歩行者がいるときに第２歩行者検出信号を第３制御部４４に出力し、横断歩道３に歩行者がいるときに第３歩行者検出信号を第３制御部４４に出力する。 The second control unit 43 controls the second transmitting antenna 27 to cause the second transmitting antenna 27 to radiate the second radio wave 28 toward at least one of the crosswalk 3 and the second pedestrian waiting area 9. The second control unit 43 receives the second signal from the second receiving antenna 29. The second control unit 43 processes the second signal, outputs a second pedestrian detection signal to the third control unit 44 when there is a pedestrian in the second pedestrian waiting area 9, and When a pedestrian is present, a third pedestrian detection signal is output to the third controller 44.
　第３制御部４４は、第１歩行者検出信号を第１制御部４２から受信するとともに、第２歩行者検出信号または第３歩行者検出信号を第２制御部４３から受信する。第３制御部４４は、第１歩行者検出信号と第２歩行者検出信号と第３歩行者検出信号とから、制御信号を生成する。第３制御部４４は、制御信号を信号送信器４５に送信する。 The third control unit 44 receives the first pedestrian detection signal from the first control unit 42 and also receives the second pedestrian detection signal or the third pedestrian detection signal from the second control unit 43. The third control unit 44 generates a control signal from the first pedestrian detection signal, the second pedestrian detection signal, and the third pedestrian detection signal. The third control section 44 transmits a control signal to the signal transmitter 45.
　図４を参照して、実施形態１の交通安全支援システム４０を説明する。交通安全支援システム４０は、本実施形態の電波センサ１と、信号送信器４５とを含む。信号送信器４５は、第３制御部４４から制御信号を受信する。信号送信器４５は、この制御信号に応じて、自動車用信号機１１、第１歩行者用信号機１３ａ、第２歩行者用信号機１３ｂまたは第１車道２を走行する自動車の少なくとも一つに交通安全支援信号を送信する。信号送信器４５は、さらに、第２車道４を走行する自動車にも交通安全支援信号を送信してもよい。 With reference to FIG. 4, the traffic safety support system 40 of the first embodiment will be described. The traffic safety support system 40 includes the radio wave sensor 1 of this embodiment and a signal transmitter 45. The signal transmitter 45 receives a control signal from the third controller 44 . In response to this control signal, the signal transmitter 45 provides traffic safety support to at least one of the automobile traffic signal 11, the first pedestrian traffic signal 13a, the second pedestrian traffic signal 13b, or a vehicle traveling on the first roadway 2. Send a signal. The signal transmitter 45 may also transmit a traffic safety support signal to vehicles traveling on the second roadway 4.
　図１から図４を参照して、本実施形態の電波センサ１及び交通安全支援システム４０の動作を説明する。 The operation of the radio wave sensor 1 and the traffic safety support system 40 of this embodiment will be explained with reference to FIGS. 1 to 4.
　コントローラ４１は、第１アンテナ装置２０を制御して、第１送信アンテナ２２に第１歩行者待機エリア７に向けて第１電波２３を送信させる。第１歩行者待機エリア７に歩行者がいるとき、第１電波２３は、歩行者によって反射されて、第１アンテナ装置２０に戻る。第１受信アンテナ２４は、歩行者によって反射された第１電波２３を受信する。第１受信アンテナ２４は、コントローラ４１（具体的には、第１制御部４２）に、第１信号を送信する。第１制御部４２は、第１信号を処理して、第１歩行者待機エリア７に歩行者がいるときに第１歩行者検出信号を第３制御部４４に出力する。 The controller 41 controls the first antenna device 20 to cause the first transmitting antenna 22 to transmit the first radio wave 23 toward the first pedestrian waiting area 7. When there is a pedestrian in the first pedestrian waiting area 7 , the first radio wave 23 is reflected by the pedestrian and returns to the first antenna device 20 . The first receiving antenna 24 receives the first radio wave 23 reflected by the pedestrian. The first receiving antenna 24 transmits a first signal to the controller 41 (specifically, the first control unit 42). The first control unit 42 processes the first signal and outputs a first pedestrian detection signal to the third control unit 44 when a pedestrian is present in the first pedestrian waiting area 7 .
　コントローラ４１は、第２アンテナ装置２５を制御して、第２送信アンテナ２７に横断歩道３または第２歩行者待機エリア９の少なくとも一つに向けて第２電波２８を送信させる。横断歩道３または第２歩行者待機エリア９の少なくとも一つに歩行者がいるとき、第２電波２８は、歩行者によって反射されて、第２アンテナ装置２５に戻る。第２受信アンテナ２９は、歩行者によって反射された第２電波２８を受信する。第２受信アンテナ２９は、コントローラ４１（具体的には、第２制御部４３）に、第２信号を送信する。第２制御部４３は、第２信号を処理して、第２歩行者待機エリア９に歩行者がいるときに第２歩行者検出信号を第３制御部４４に出力し、横断歩道３に歩行者がいるときに第３歩行者検出信号を第３制御部４４に出力する。 The controller 41 controls the second antenna device 25 to cause the second transmitting antenna 27 to transmit the second radio wave 28 toward at least one of the crosswalk 3 and the second pedestrian waiting area 9. When there is a pedestrian in at least one of the crosswalk 3 or the second pedestrian waiting area 9, the second radio wave 28 is reflected by the pedestrian and returns to the second antenna device 25. The second receiving antenna 29 receives the second radio wave 28 reflected by the pedestrian. The second receiving antenna 29 transmits a second signal to the controller 41 (specifically, the second control section 43). The second control unit 43 processes the second signal, outputs a second pedestrian detection signal to the third control unit 44 when there is a pedestrian in the second pedestrian waiting area 9, and When a pedestrian is present, a third pedestrian detection signal is output to the third controller 44.
　第３制御部４４が第１制御部４２から第１歩行者検出信号を受信すると、第３制御部４４は、第１制御信号を生成して、第１制御信号を信号送信器４５に出力する。信号送信器４５は、第１制御信号を受信すると、自動車用信号機１１、第１歩行者用信号機１３ａ及び第２歩行者用信号機１３ｂに第１の交通安全支援信号を送信する。信号送信器４５が第１制御信号を受信した時点から所定時間経過後に、自動車用信号機１１の表示が走行指示（例えば、青信号）から停止指示（例えば、赤信号）に切り換わるとともに、第１歩行者用信号機１３ａの表示と第２歩行者用信号機１３ｂの表示とが、停止指示（例えば、赤信号）から歩行指示（例えば、青信号）に切り換わる。 When the third control unit 44 receives the first pedestrian detection signal from the first control unit 42, the third control unit 44 generates a first control signal and outputs the first control signal to the signal transmitter 45. . Upon receiving the first control signal, the signal transmitter 45 transmits a first traffic safety support signal to the automobile traffic signal 11, the first pedestrian traffic signal 13a, and the second pedestrian traffic signal 13b. After a predetermined period of time has elapsed since the signal transmitter 45 received the first control signal, the display on the automobile traffic light 11 switches from a running instruction (for example, a green light) to a stop instruction (for example, a red light), and the first The display on the pedestrian traffic light 13a and the display on the second pedestrian traffic light 13b switch from a stop instruction (for example, a red light) to a walk instruction (for example, a green light).
　第３制御部４４、信号送信器４５、自動車用信号機１１、第１歩行者用信号機１３ａ及び第２歩行者用信号機１３ｂは、第３制御部４４が第２制御部４３から第２歩行者検出信号を受信するときも、第３制御部４４が第１制御部４２から第１歩行者検出信号を受信するときと、同様に動作する。 The third control unit 44, the signal transmitter 45, the automobile traffic signal 11, the first pedestrian traffic signal 13a, and the second pedestrian traffic signal 13b are configured so that the third control unit 44 detects the second pedestrian from the second control unit 43. When receiving the signal, the third control section 44 operates in the same manner as when receiving the first pedestrian detection signal from the first control section 42 .
　第３制御部４４が第３歩行者検出信号を第２制御部４３から受信すると、第３制御部４４は、第２制御信号を生成して、第２制御信号を信号送信器４５に出力する。信号送信器４５は、第２制御信号を受信すると、第１車道２を走行する自動車に第２の交通安全支援信号を出力する。横断歩道３に歩行者がいることが、第１車道２を走行する自動車の運転手に報知される。信号送信器４５は、第２制御信号を受信すると、第２車道４を走行する自動車にも第２の交通安全支援信号を出力してもよい。 When the third controller 44 receives the third pedestrian detection signal from the second controller 43, the third controller 44 generates a second control signal and outputs the second control signal to the signal transmitter 45. . Upon receiving the second control signal, the signal transmitter 45 outputs a second traffic safety support signal to the vehicle traveling on the first roadway 2. The presence of a pedestrian at the crosswalk 3 is notified to the driver of a car traveling on the first roadway 2. When the signal transmitter 45 receives the second control signal, it may also output the second traffic safety support signal to vehicles traveling on the second roadway 4.
　（変形例）
　図５に示されるように、本実施形態の第１変形例では、ベース板３１は、突起３１ｂを含む。突起３１ｂは、ベース板３１の主面３１ａから突出しており、レドーム３２に対向している。レドーム３２は、固定部材３５を用いて、突起３１ｂに締結される。封止部材３６は、突起３１ｂとレドーム３２との間に配置されている。 (Modified example)
As shown in FIG. 5, in the first modification of this embodiment, the base plate 31 includes a protrusion 31b. The protrusion 31b protrudes from the main surface 31a of the base plate 31 and faces the radome 32. The radome 32 is fastened to the protrusion 31b using a fixing member 35. The sealing member 36 is arranged between the protrusion 31b and the radome 32.
　図６に示されるように、本実施形態の第２変形例では、ベース板３１は、主面３１ａに接続されている側面３１ｃを含む。側面３１ｃは、レドーム３２に対向している。レドーム３２は、固定部材３５を用いて、ベース板３１の側面３１ｃに締結される。封止部材３６は、ベース板３１の側面３１ｃとレドーム３２との間に配置されている。 As shown in FIG. 6, in the second modification of the present embodiment, the base plate 31 includes a side surface 31c connected to the main surface 31a. The side surface 31c faces the radome 32. The radome 32 is fastened to the side surface 31c of the base plate 31 using a fixing member 35. The sealing member 36 is arranged between the side surface 31c of the base plate 31 and the radome 32.
　図７に示されるように、本実施形態の第３変形例では、筐体３０は、ケース３７と、第１窓部材３８と、第２窓部材３９と、第１固定部材３５ａと、第２固定部材３５ｂとを含む。ケース３７と第１窓部材３８と第２窓部材３９とによって収容空間３０ａが形成される。第１アンテナ装置２０と第２アンテナ装置２５とは、収容空間３０ａ内に収容される。筐体３０は、第１封止部材３６ａと、第２封止部材３６ｂとをさらに含んでもよい。 As shown in FIG. 7, in the third modification of the present embodiment, the housing 30 includes a case 37, a first window member 38, a second window member 39, a first fixing member 35a, and a second window member 38. and a fixing member 35b. A housing space 30a is formed by the case 37, the first window member 38, and the second window member 39. The first antenna device 20 and the second antenna device 25 are housed in the housing space 30a. The housing 30 may further include a first sealing member 36a and a second sealing member 36b.
　ケース３７は、例えば、金属で形成されている。ケース３７は、第１電波２３及び第２電波２８を透過させない材料で形成されてもよい。ケース３７は、外表面３７ａと、外表面３７ａとは反対側の内表面３７ｂとを含む。ケース３７には、第１開口３７ｃと、第２開口３７ｄとが設けられている。第１開口３７ｃ及び第２開口３７ｄは、各々、外表面３７ａから内表面３７ｂまで延在している。 The case 37 is made of metal, for example. The case 37 may be formed of a material that does not allow the first radio waves 23 and the second radio waves 28 to pass through. Case 37 includes an outer surface 37a and an inner surface 37b opposite to outer surface 37a. The case 37 is provided with a first opening 37c and a second opening 37d. The first opening 37c and the second opening 37d each extend from the outer surface 37a to the inner surface 37b.
　第１窓部材３８は、第１固定部材３５ａを用いてケース３７に固定されており、第１開口３７ｃを閉塞している。例えば、第１固定部材３５ａはねじであり、第１窓部材３８は、第１固定部材３５ａを用いて、ケース３７に締結される。第１窓部材３８は、第１アンテナ装置２０に対向している。第１窓部材３８は、ケース３７の外表面３７ａに対向している。第１窓部材３８は、第１電波２３を透過させる材料（例えば、樹脂）で形成されている。 The first window member 38 is fixed to the case 37 using the first fixing member 35a, and closes the first opening 37c. For example, the first fixing member 35a is a screw, and the first window member 38 is fastened to the case 37 using the first fixing member 35a. The first window member 38 faces the first antenna device 20. The first window member 38 faces the outer surface 37a of the case 37. The first window member 38 is made of a material (for example, resin) that allows the first radio wave 23 to pass through.
　第２窓部材３９は、第２固定部材３５ｂを用いてケース３７に固定されており、第２開口３７ｄを閉塞している。例えば、第２固定部材３５ｂはねじであり、第２窓部材３９は、第２固定部材３５ｂを用いて、ケース３７に締結される。第２窓部材３９は、第２アンテナ装置２５に対向している。第２窓部材３９は、ケース３７の外表面３７ａに対向している。第２窓部材３９は、第２電波２８を透過させる材料（例えば、樹脂）で形成されている。 The second window member 39 is fixed to the case 37 using the second fixing member 35b, and closes the second opening 37d. For example, the second fixing member 35b is a screw, and the second window member 39 is fastened to the case 37 using the second fixing member 35b. The second window member 39 faces the second antenna device 25. The second window member 39 faces the outer surface 37a of the case 37. The second window member 39 is made of a material (for example, resin) that allows the second radio wave 28 to pass through.
　第１封止部材３６ａは、ケース３７と第１窓部材３８との間を封止する。第１封止部材３６ａは、ケース３７の外表面３７ａと第１窓部材３８との間に配置されている。第１封止部材３６ａは、例えば、Ｏリングである。第２封止部材３６ｂは、ケース３７と第２窓部材３９との間を封止する。第２封止部材３６ｂは、ケース３７の外表面３７ａと第２窓部材３９との間に配置されている。第２封止部材３６ｂは、例えば、Ｏリングである。 The first sealing member 36a seals between the case 37 and the first window member 38. The first sealing member 36a is arranged between the outer surface 37a of the case 37 and the first window member 38. The first sealing member 36a is, for example, an O-ring. The second sealing member 36b seals between the case 37 and the second window member 39. The second sealing member 36b is arranged between the outer surface 37a of the case 37 and the second window member 39. The second sealing member 36b is, for example, an O-ring.
　図８に示されるように、本実施形態の第４変形例では、第１窓部材３８は、ケース３７の内表面３７ｂに対向している。第２窓部材３９は、ケース３７の内表面３７ｂに対向している。第１封止部材３６ａは、ケース３７の内表面３７ｂと第１窓部材３８との間に配置されている。第２封止部材３６ｂは、ケース３７の内表面３７ｂと第２窓部材３９との間に配置されている。 As shown in FIG. 8, in the fourth modification of the present embodiment, the first window member 38 faces the inner surface 37b of the case 37. The second window member 39 faces the inner surface 37b of the case 37. The first sealing member 36a is arranged between the inner surface 37b of the case 37 and the first window member 38. The second sealing member 36b is arranged between the inner surface 37b of the case 37 and the second window member 39.
　（実施形態２）
　図９を参照して、実施形態２の電波センサ１を説明する。本実施形態の電波センサ１は、実施形態１の電波センサ１と同様の構成を備えているが、以下の点で実施形態１の電波センサ１と異なっている。 (Embodiment 2)
With reference to FIG. 9, a radio wave sensor 1 according to a second embodiment will be described. The radio wave sensor 1 of this embodiment has the same configuration as the radio wave sensor 1 of the first embodiment, but differs from the radio wave sensor 1 of the first embodiment in the following points.
　本実施形態の電波センサ１は、支持基板５０と、第１角度調整器５１と、第２角度調整器５６とをさらに備える。支持基板５０は、第１角度調整器５１と、第２角度調整器５６とを支持している。第１アンテナ装置２０は、第１角度調整器５１を介して、支持基板５０に支持されている。第２アンテナ装置２５は、第２角度調整器５６を介して、支持基板５０に支持されている。 The radio wave sensor 1 of this embodiment further includes a support substrate 50, a first angle adjuster 51, and a second angle adjuster 56. The support substrate 50 supports a first angle adjuster 51 and a second angle adjuster 56. The first antenna device 20 is supported by a support substrate 50 via a first angle adjuster 51. The second antenna device 25 is supported by the support substrate 50 via a second angle adjuster 56.
　第１角度調整器５１は、第１主面２１ａの第１の向きを調整可能である。そのため、第１電波２３の第１進行方向２３ａを調整することができる。具体的には、第１角度調整器５１は、支柱５２と、ヒンジ５３とを含む。支柱５２は、支持基板５０に固定されている。支柱５２は、ヒンジ５３を回転可能に支持している。ヒンジ５３は、第１アンテナ基板２１に固定されている。 The first angle adjuster 51 can adjust the first direction of the first main surface 21a. Therefore, the first traveling direction 23a of the first radio wave 23 can be adjusted. Specifically, the first angle adjuster 51 includes a support 52 and a hinge 53. The support column 52 is fixed to the support substrate 50. The support column 52 rotatably supports the hinge 53. The hinge 53 is fixed to the first antenna board 21.
　第２角度調整器５６は、第２主面２６ａの第２の向きを調整可能である。そのため、第２電波２８の第２進行方向２８ａを調整することができる。具体的には、第２角度調整器５６は、支柱５７と、ヒンジ５８とを含む。支柱５７は、支持基板５０に固定されている。支柱５７は、ヒンジ５８を回転可能に支持している。ヒンジ５８は、第２アンテナ基板２６に固定されている。 The second angle adjuster 56 can adjust the second direction of the second main surface 26a. Therefore, the second traveling direction 28a of the second radio wave 28 can be adjusted. Specifically, the second angle adjuster 56 includes a support 57 and a hinge 58. The support column 57 is fixed to the support substrate 50. The support column 57 rotatably supports the hinge 58. The hinge 58 is fixed to the second antenna board 26.
　本実施形態の第１アンテナ装置２０と第２アンテナ装置２５と支持基板５０と第１角度調整器５１と第２角度調整器５６とは、実施形態１またはその変形例のいずれかの筐体３０（図２、図３及び図５から図８を参照）に収容されている。 The first antenna device 20, the second antenna device 25, the support substrate 50, the first angle adjuster 51, and the second angle adjuster 56 of the present embodiment are connected to the housing 30 of the first embodiment or a modification thereof. (See FIGS. 2, 3 and 5 to 8).
　本実施形態の電波センサ１は、第１角度調整器５１及び第２角度調整器５６の一方を備えてもよく、第１角度調整器５１及び第２角度調整器５６の他方は省略されてもよい。すなわち、電波センサ１は、第１角度調整器５１または第２角度調整器５６の少なくとも一つを備えていればよい。 The radio wave sensor 1 of this embodiment may include one of the first angle adjuster 51 and the second angle adjuster 56, or the other of the first angle adjuster 51 and the second angle adjuster 56 may be omitted. good. That is, the radio wave sensor 1 only needs to include at least one of the first angle adjuster 51 and the second angle adjuster 56.
　本開示は以下に示す実施形態を含む。
（付記１）
　第１アンテナ装置と、
　第２アンテナ装置とを備える電波センサであって、
　前記第１アンテナ装置は、第１歩行者待機エリアに第１電波を送信する第１送信アンテナを含み、
　前記第２アンテナ装置は、横断歩道または第２歩行者待機エリアの少なくとも一つに第２電波を送信する第２送信アンテナを含み、
　前記第１歩行者待機エリアは、前記電波センサが配置される歩道に含まれ、
　前記横断歩道は、前記第１歩行者待機エリアに隣接しており、
　前記第２歩行者待機エリアは、前記横断歩道に対して前記第１歩行者待機エリアとは反対側で、前記横断歩道に隣接している、電波センサ。
（付記２）
　前記第１電波を送信するために前記第１送信アンテナに供給される第１送信電力は、前記第２電波を送信するために前記第２送信アンテナに供給される第２送信電力に等しいまたはよりも小さい、付記１に記載の電波センサ。
（付記３）
　前記第１送信アンテナは、第１送信アンテナ素子を含み、
　前記第２送信アンテナは、第２送信アンテナ素子を含み、
　前記第１送信アンテナ素子の数は、前記第２送信アンテナ素子の数よりも少ない、付記１または付記２に記載の電波センサ。
（付記４）
　前記第１アンテナ装置は、第１主面を含む第１アンテナ基板を含み、
　前記第１送信アンテナは、前記第１主面上に搭載されており、
　前記第２アンテナ装置は、第２主面を含む第２アンテナ基板を含み、
　前記第２送信アンテナは、前記第２主面上に搭載されている、付記１から付記３のいずれか一項に記載の電波センサ。
（付記５）
　第１角度調整器または第２角度調整器の少なくとも一つをさらに備え、
　前記第１角度調整器は、前記第１主面の第１の向きを調整可能であり、
　前記第２角度調整器は、前記第２主面の第２の向きを調整可能である、付記４に記載の電波センサ。
（付記６）
　前記第１アンテナ装置と前記第２アンテナ装置とを収容する筐体をさらに備える、付記１から付記５のいずれか一項に記載の電波センサ。
（付記７）
　前記筐体は、ベース板と、前記ベース板に固定されているレドームとを含む、付記６に記載の電波センサ。
（付記８）
　前記筐体は、封止部材をさらに含み、
　前記封止部材は、前記ベース板と前記レドームとの間に配置されており、かつ、前記ベース板と前記レドームとの間を封止する、付記７に記載の電波センサ。
（付記９）
　前記筐体は、ケースと、第１窓部材と、第２窓部材とを含み、
　前記ケースには、第１開口と、第２開口とが設けられており、
　前記第１窓部材は、前記ケースに固定されており、前記第１開口を閉塞しており、かつ、前記第１アンテナ装置に対向しており、
　前記第２窓部材は、前記ケースに固定されており、前記第２開口を閉塞しており、かつ、前記第２アンテナ装置に対向している、付記６に記載の電波センサ。
（付記１０）
　前記筐体は、第１封止部材と、第２封止部材とをさらに含み、
　前記第１封止部材は、前記ケースと前記第１窓部材との間に配置されており、かつ、前記ケースと前記第１窓部材との間を封止し、
　前記第２封止部材は、前記ケースと前記第２窓部材との間に配置されており、かつ、前記ケースと前記第２窓部材との間を封止する、付記９に記載の電波センサ。 The present disclosure includes the embodiments described below.
(Additional note 1)
a first antenna device;
A radio wave sensor comprising a second antenna device,
The first antenna device includes a first transmitting antenna that transmits a first radio wave to a first pedestrian waiting area,
The second antenna device includes a second transmitting antenna that transmits a second radio wave to at least one of a crosswalk or a second pedestrian waiting area,
The first pedestrian waiting area is included in the sidewalk where the radio wave sensor is arranged,
The crosswalk is adjacent to the first pedestrian waiting area,
The second pedestrian waiting area is a radio wave sensor adjacent to the crosswalk and on the opposite side of the crosswalk from the first pedestrian waiting area.
(Additional note 2)
The first transmit power supplied to the first transmit antenna for transmitting the first radio wave is equal to or greater than the second transmit power supplied to the second transmit antenna for transmitting the second radio wave. The radio wave sensor described in Appendix 1 is also small.
(Additional note 3)
the first transmitting antenna includes a first transmitting antenna element;
the second transmitting antenna includes a second transmitting antenna element;
The radio wave sensor according to Supplementary Note 1 or 2, wherein the number of the first transmitting antenna elements is smaller than the number of the second transmitting antenna elements.
(Additional note 4)
The first antenna device includes a first antenna substrate including a first main surface,
The first transmitting antenna is mounted on the first main surface,
The second antenna device includes a second antenna substrate including a second main surface,
The radio wave sensor according to any one of Supplementary notes 1 to 3, wherein the second transmitting antenna is mounted on the second main surface.
(Appendix 5)
further comprising at least one of a first angle adjuster or a second angle adjuster,
The first angle adjuster is capable of adjusting a first direction of the first main surface,
The radio wave sensor according to appendix 4, wherein the second angle adjuster is capable of adjusting the second direction of the second principal surface.
(Appendix 6)
The radio wave sensor according to any one of Supplementary Notes 1 to 5, further comprising a housing that accommodates the first antenna device and the second antenna device.
(Appendix 7)
The radio wave sensor according to appendix 6, wherein the casing includes a base plate and a radome fixed to the base plate.
(Appendix 8)
The casing further includes a sealing member,
The radio wave sensor according to appendix 7, wherein the sealing member is disposed between the base plate and the radome, and seals between the base plate and the radome.
(Appendix 9)
The housing includes a case, a first window member, and a second window member,
The case is provided with a first opening and a second opening,
The first window member is fixed to the case, closes the first opening, and faces the first antenna device,
The radio wave sensor according to appendix 6, wherein the second window member is fixed to the case, closes the second opening, and faces the second antenna device.
(Appendix 10)
The casing further includes a first sealing member and a second sealing member,
The first sealing member is disposed between the case and the first window member, and seals between the case and the first window member,
The radio wave sensor according to appendix 9, wherein the second sealing member is disposed between the case and the second window member and seals between the case and the second window member. .
　今回開示された実施形態１及び実施形態２並びにこれらの変形例はすべての点で例示であって、制限的なものではないと考えられるべきである。矛盾のない限り、今回開示された実施形態１及び実施形態２並びにこれらの変形例の少なくとも二つを組み合わせてもよい。本開示の範囲は上記した実施形態ではなく請求の範囲によって示され、請求の範囲と均等の意味、および範囲内でのすべての変更が含まれることが意図される。 Embodiment 1, Embodiment 2, and their modifications disclosed this time are illustrative in all respects, and should be considered not to be restrictive. Unless there is a contradiction, at least two of the first and second embodiments and their modifications disclosed herein may be combined. The scope of the present disclosure is indicated by the claims rather than the embodiments described above, and it is intended that equivalent meanings to the claims and all changes within the scope are included.
１　電波センサ、２　第１車道、３　横断歩道、４　第２車道、５　交差点、６　第１歩道、７　第１歩行者待機エリア、８　第２歩道、９　第２歩行者待機エリア、１０ａ　第１支柱、１０ｂ　第２支柱、１１　自動車用信号機、１２　アーム、１３ａ　第１歩行者用信号機、１３ｂ　第２歩行者用信号機、１４　アーム、１６，１７，１８　照射領域、２０　第１アンテナ装置、２１　第１アンテナ基板、２１ａ　第１主面、２１ｂ　第１法線、２２　第１送信アンテナ、２２ａ　第１送信アンテナ素子、２３　第１電波、２３ａ　第１進行方向、２４　第１受信アンテナ、２４ａ　第１受信アンテナ素子、２５　第２アンテナ装置、２６　第２アンテナ基板、２６ａ　第２主面、２６ｂ　第２法線、２７　第２送信アンテナ、２７ａ　第２送信アンテナ素子、２８　第２電波、２８ａ　第２進行方向、２９　第２受信アンテナ、２９ａ　第２受信アンテナ素子、３０　筐体、３０ａ　収容空間、３１　ベース板、３１ａ　主面、３１ｂ　突起、３１ｃ　側面、３２　レドーム、３２ａ　フランジ、３５　固定部材、３５ａ　第１固定部材、３５ｂ　第２固定部材、３６　封止部材、３６ａ　第１封止部材、３６ｂ　第２封止部材、３７　ケース、３７ａ　外表面、３７ｂ　内表面、３７ｃ　第１開口、３７ｄ　第２開口、３８　第１窓部材、３９　第２窓部材、４０　交通安全支援システム、４１　コントローラ、４２　第１制御部、４３　第２制御部、４４　第３制御部、４５　信号送信器、５０　支持基板、５１　第１角度調整器、５２，５７　支柱、５３，５８　ヒンジ、５６　第２角度調整器。
  1 radio wave sensor, 2 first roadway, 3 crosswalk, 4 second roadway, 5 intersection, 6 first sidewalk, 7 first pedestrian waiting area, 8 second sidewalk, 9 second pedestrian waiting area, 10a first Pillar, 10b Second pillar, 11 Automobile traffic light, 12 Arm, 13a First pedestrian traffic light, 13b Second pedestrian traffic light, 14 Arm, 16, 17, 18 Irradiation area, 20 First antenna device, 21 1 antenna substrate, 21a first principal surface, 21b first normal, 22 first transmitting antenna, 22a first transmitting antenna element, 23 first radio wave, 23a first traveling direction, 24 first receiving antenna, 24a first receiving Antenna element, 25 Second antenna device, 26 Second antenna substrate, 26a Second principal surface, 26b Second normal, 27 Second transmitting antenna, 27a Second transmitting antenna element, 28 Second radio wave, 28a Second direction of travel , 29 second receiving antenna, 29a second receiving antenna element, 30 housing, 30a housing space, 31 base plate, 31a main surface, 31b protrusion, 31c side surface, 32 radome, 32a flange, 35 fixing member, 35a first fixing Member, 35b Second fixing member, 36 Sealing member, 36a First sealing member, 36b Second sealing member, 37 Case, 37a Outer surface, 37b Inner surface, 37c First opening, 37d Second opening, 38th 1 window member, 39 second window member, 40 traffic safety support system, 41 controller, 42 first control section, 43 second control section, 44 third control section, 45 signal transmitter, 50 support substrate, 51 first angle Adjuster, 52, 57 Post, 53, 58 Hinge, 56 Second angle adjuster.

Claims (10)

  1. 　第１アンテナ装置と、
    　第２アンテナ装置とを備える電波センサであって、
    　前記第１アンテナ装置は、第１歩行者待機エリアに第１電波を送信する第１送信アンテナを含み、
    　前記第２アンテナ装置は、横断歩道または第２歩行者待機エリアの少なくとも一つに第２電波を送信する第２送信アンテナを含み、
    　前記第１歩行者待機エリアは、前記電波センサが配置される歩道に含まれ、
    　前記横断歩道は、前記第１歩行者待機エリアに隣接しており、
    　前記第２歩行者待機エリアは、前記横断歩道に対して前記第１歩行者待機エリアとは反対側で、前記横断歩道に隣接している、電波センサ。     a first antenna device;
    A radio wave sensor comprising a second antenna device,
    The first antenna device includes a first transmitting antenna that transmits a first radio wave to a first pedestrian waiting area,
    The second antenna device includes a second transmitting antenna that transmits a second radio wave to at least one of a crosswalk or a second pedestrian waiting area,
    The first pedestrian waiting area is included in the sidewalk where the radio wave sensor is arranged,
    The crosswalk is adjacent to the first pedestrian waiting area,
    The second pedestrian waiting area is a radio wave sensor adjacent to the crosswalk and on the opposite side of the crosswalk from the first pedestrian waiting area.
  2. 　前記第１電波を送信するために前記第１送信アンテナに供給される第１送信電力は、前記第２電波を送信するために前記第２送信アンテナに供給される第２送信電力に等しいまたはよりも小さい、請求項１に記載の電波センサ。 The first transmit power supplied to the first transmit antenna for transmitting the first radio wave is equal to or greater than the second transmit power supplied to the second transmit antenna for transmitting the second radio wave. The radio wave sensor according to claim 1, wherein the radio wave sensor is also small.
  3. 　前記第１送信アンテナは、第１送信アンテナ素子を含み、
    　前記第２送信アンテナは、第２送信アンテナ素子を含み、
    　前記第１送信アンテナ素子の数は、前記第２送信アンテナ素子の数よりも少ない、請求項１または請求項２に記載の電波センサ。     the first transmitting antenna includes a first transmitting antenna element;
    the second transmitting antenna includes a second transmitting antenna element;
    The radio wave sensor according to claim 1 or 2, wherein the number of the first transmitting antenna elements is smaller than the number of the second transmitting antenna elements.
  4. 　前記第１アンテナ装置は、第１主面を含む第１アンテナ基板を含み、
    　前記第１送信アンテナは、前記第１主面上に搭載されており、
    　前記第２アンテナ装置は、第２主面を含む第２アンテナ基板を含み、
    　前記第２送信アンテナは、前記第２主面上に搭載されている、請求項１から請求項３のいずれか一項に記載の電波センサ。     The first antenna device includes a first antenna substrate including a first main surface,
    The first transmitting antenna is mounted on the first main surface,
    The second antenna device includes a second antenna substrate including a second main surface,
    The radio wave sensor according to any one of claims 1 to 3, wherein the second transmitting antenna is mounted on the second main surface.
  5. 　第１角度調整器または第２角度調整器の少なくとも一つをさらに備え、
    　前記第１角度調整器は、前記第１主面の第１の向きを調整可能であり、
    　前記第２角度調整器は、前記第２主面の第２の向きを調整可能である、請求項４に記載の電波センサ。     further comprising at least one of a first angle adjuster or a second angle adjuster,
    The first angle adjuster is capable of adjusting a first direction of the first main surface,
    The radio wave sensor according to claim 4, wherein the second angle adjuster is capable of adjusting a second direction of the second main surface.
  6. 　前記第１アンテナ装置と前記第２アンテナ装置とを収容する筐体をさらに備える、請求項１から請求項５のいずれか一項に記載の電波センサ。 The radio wave sensor according to any one of claims 1 to 5, further comprising a housing that accommodates the first antenna device and the second antenna device.
  7. 　前記筐体は、ベース板と、前記ベース板に固定されているレドームとを含む、請求項６に記載の電波センサ。 The radio wave sensor according to claim 6, wherein the housing includes a base plate and a radome fixed to the base plate.
  8. 　前記筐体は、封止部材をさらに含み、
    　前記封止部材は、前記ベース板と前記レドームとの間に配置されており、かつ、前記ベース板と前記レドームとの間を封止する、請求項７に記載の電波センサ。     The casing further includes a sealing member,
    The radio wave sensor according to claim 7, wherein the sealing member is disposed between the base plate and the radome, and seals between the base plate and the radome.
  9. 　前記筐体は、ケースと、第１窓部材と、第２窓部材とを含み、
    　前記ケースには、第１開口と、第２開口とが設けられており、
    　前記第１窓部材は、前記ケースに固定されており、前記第１開口を閉塞しており、かつ、前記第１アンテナ装置に対向しており、
    　前記第２窓部材は、前記ケースに固定されており、前記第２開口を閉塞しており、かつ、前記第２アンテナ装置に対向している、請求項６に記載の電波センサ。     The housing includes a case, a first window member, and a second window member,
    The case is provided with a first opening and a second opening,
    The first window member is fixed to the case, closes the first opening, and faces the first antenna device,
    The radio wave sensor according to claim 6, wherein the second window member is fixed to the case, closes the second opening, and faces the second antenna device.
  10. 　前記筐体は、第１封止部材と、第２封止部材とをさらに含み、
    　前記第１封止部材は、前記ケースと前記第１窓部材との間に配置されており、かつ、前記ケースと前記第１窓部材との間を封止し、
    　前記第２封止部材は、前記ケースと前記第２窓部材との間に配置されており、かつ、前記ケースと前記第２窓部材との間を封止する、請求項９に記載の電波センサ。     The casing further includes a first sealing member and a second sealing member,
    The first sealing member is disposed between the case and the first window member, and seals between the case and the first window member,
    The radio wave according to claim 9, wherein the second sealing member is disposed between the case and the second window member and seals between the case and the second window member. sensor.
PCT/JP2023/022061 2022-06-20 2023-06-14 Radio wave sensor WO2023248889A1 (en)

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JPH114118A (en) * 1997-06-13 1999-01-06 Fujitsu Ltd Semiconductor module incorporating antenna element
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Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH114118A (en) * 1997-06-13 1999-01-06 Fujitsu Ltd Semiconductor module incorporating antenna element
JP2002208086A (en) * 2001-01-11 2002-07-26 Sumitomo Electric Ind Ltd Crossing support system
JP2007178140A (en) * 2005-12-27 2007-07-12 Hitachi Ltd Object detection sensor
JP2008040685A (en) * 2006-08-03 2008-02-21 Mitsubishi Electric Engineering Co Ltd Acoustic traffic signal
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