JP6984448B2 - Sight, radio sensor and adjustment method - Google Patents

Description

The present invention relates to a sight, a radio wave sensor and an adjustment method.

In recent years, a technique for monitoring the traffic flow of a vehicle traveling on a road has been developed by using a radio wave sensor installed on the roadside. For example, Japanese Patent Application Laid-Open No. 2017-090138 (Patent Document 1) discloses the following radio wave sensor. That is, the radio wave sensor is a radio wave sensor capable of detecting an object in a target area including a crosswalk, and is a transmission unit that transmits a plurality of types of radio waves generated by using a plurality of types of modulation methods to the target area. The detection unit includes a reception unit that receives radio waves and a detection unit that detects the object for each sub-area in the target area using the modulation method based on the radio waves received by the reception unit. Detects the object in at least one of the sub-areas by using a plurality of types of the modulation schemes.

Japanese Unexamined Patent Publication No. 2017-090138

Eugin Hyun, 2 outsiders, "A Pedestrian Detection Screening a Coherent Phase Difference Method Based on 2D Range-Doppler FMCW Radar", 16th year, 16th year. 124 Koji Quarter, 2 outsiders, "Application of Expanding Millimeter Wave Technology", Shimada Rika Giho, 2011, No. 21, P.M. 37-48 Takayuki Inaba, Tetsuro Kirimoto, "In-Vehicle Millimeter Wave Radar", Automotive Technology, February 2010, Vol. 64, No. 2, P.M. 74-79 Edited and published by the Institute of Electronics, Information and Communication Engineers, supervised by Takashi Yoshida, "Revised Radar Technology", Revised Edition, Corona Publishing Co., Ltd., October 1996, P275-276

It is necessary to accurately orient the radio wave sensor as described above to the target area including the pedestrian crossing and the like. However, while the image sensor allows the operator to adjust the orientation of the image sensor while checking the captured image, the radio wave sensor does not allow the operator to visually recognize the target area. In many cases, there is no marker near the center of the target area where the radio wave sensor should be oriented. Therefore, it is difficult to accurately orient the radio wave sensor toward the target area.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a sight, a radio wave sensor, and an adjustment method capable of more easily adjusting the orientation of the radio wave sensor.

(1) In order to solve the above problems, the aiming device according to a certain aspect of the present invention is a aiming device used for a radio wave sensor, and the aiming device is attached to a main body of the radio wave sensor. The orientation of the aiming device is different from the radio wave irradiation direction of the radio wave sensor, and the angle formed by the orientation of the aiming device and the radio wave irradiation direction in the mounted state is the installation height of the radio wave sensor and the radio wave. It is set based on the horizontal distance from the sensor to the reference point.

(7) In order to solve the above problems, the radio wave sensor according to a certain aspect of the present invention is a radio wave sensor including a main body portion and an aiming device attached to the main body portion, and the aiming device is the main body portion. In the mounted state attached to, the orientation of the aiming device is different from the radio wave irradiation direction of the radio wave sensor, and the angle formed by the orientation of the aiming device and the radio wave irradiation direction in the mounted state is the radio wave sensor. It is set based on the installation height and the horizontal distance from the radio wave sensor to the reference point.

(8) In order to solve the above-mentioned problems, the adjustment method according to a certain aspect of the present invention is an adjustment method of a radio wave sensor including a sight, in which a step of preparing the radio wave sensor and the sighting device are the radio waves. Using the sighting device in which the direction of the sighting device is different from the radio wave irradiation direction of the radio wave sensor in the mounted state attached to the sensor, the radio wave sensor is used so that the direction of the sighting device matches the reference point. Includes a step to adjust the orientation.

According to the present invention, the orientation of the radio wave sensor can be adjusted more easily.

FIG. 1 is a diagram showing a configuration and a setting example of a radio wave sensor according to the first embodiment of the present invention. FIG. 2 is a diagram showing a configuration of a main body portion of the radio wave sensor according to the first embodiment of the present invention. FIG. 3 is a diagram showing a configuration of a transmission unit in the radar unit of the radio wave sensor according to the embodiment of the present invention. FIG. 4 is a side view showing the configuration of the radio wave sensor according to the first embodiment of the present invention. FIG. 5 is a perspective view showing the configuration of the sighting device according to the first embodiment of the present invention. FIG. 6 is a diagram showing a detailed configuration of a first plate-shaped member in the sight according to the first embodiment of the present invention. FIG. 7 is a diagram showing a detailed configuration of a second plate-shaped member in the sight according to the first embodiment of the present invention. FIG. 8 is a flowchart showing an example of the flow of the angle adjustment work of the radio wave sensor according to the first embodiment of the present invention. FIG. 9 is a side view showing the configuration of the radio wave sensor according to the second embodiment of the present invention. FIG. 10 is a perspective view of the radio wave sensor according to the second embodiment of the present invention. FIG. 11 is a flowchart showing an example of the flow of the angle adjustment work of the radio wave sensor according to the second embodiment of the present invention. FIG. 12 is a side view showing the configuration of the radio wave sensor according to the third embodiment of the present invention. FIG. 13 is a perspective view showing the configuration of the sighting device according to the third embodiment of the present invention. FIG. 14 is a flowchart showing an example of the flow of the angle adjustment work of the radio wave sensor according to the third embodiment of the present invention. FIG. 15 is a side view showing a configuration of a radio wave sensor according to a modified example of the third embodiment of the present invention. FIG. 16 is a perspective view showing the configuration of a sighting device according to a modified example of the third embodiment of the present invention. FIG. 17 is a flowchart showing an example of the flow of the angle adjustment work of the radio wave sensor according to the modified example of the third embodiment of the present invention. FIG. 18 is a side view showing the configuration of the radio wave sensor according to the fourth embodiment of the present invention. FIG. 19 is a perspective view showing a configuration of a radio wave sensor according to a fourth embodiment of the present invention. FIG. 20 is a flowchart showing an example of the flow of the angle adjustment work of the radio wave sensor according to the fourth embodiment of the present invention.

First, the contents of the embodiments of the present invention will be listed and described.

(1) The sight according to the embodiment of the present invention is a sight used for a radio wave sensor, and the orientation of the sight is set in a mounted state in which the sight is attached to the main body of the radio sensor. The direction is different from the radio wave irradiation direction of the radio wave sensor, and the angle formed by the direction of the sight and the radio wave irradiation direction in the mounted state is the installation height of the radio wave sensor and the horizontal from the radio wave sensor to the reference point. It is set based on the distance.

With such a configuration, for example, even if it is difficult to specify the position near the center of the monitored area by the radio wave sensor, the aiming device can be oriented to a reference point at a position different from the center. It is possible to aim the radio wave sensor near the center. Therefore, the orientation of the radio wave sensor can be adjusted more easily.

(2) Preferably, the sighting device includes a plurality of plate-shaped members, and holes are formed in each of the plate-shaped members, and the orientation of the sighting device is determined by the relative position of each of the holes.

With such a configuration, it is possible to realize a sighting device capable of aiming itself in a direction different from the radio wave irradiation direction of the radio wave sensor by a simple configuration. Further, with such a simple configuration, a sighting device can be easily manufactured.

(3) More preferably, at least one of the distance between the holes and the distance from the main body of each hole can be changed in the mounted state.

With such a configuration, the orientation of the sight can be changed to an appropriate orientation according to the installation conditions of the radio wave sensor. Therefore, for example, the same sighting device can be used for a plurality of radio wave sensors having different installation conditions such as the installation height and the horizontal distance to the reference point.

(4) More preferably, the sizes of the holes are different from each other.

With such a configuration, in the work of adjusting the orientation of the radio wave sensor, for example, when the hole near the operator's eyes is smaller, the size of each hole is approximated when the operator looks into another hole from the hole. Since they look the same, visibility can be improved.

(5) More preferably, each of the holes has a shape in which a plurality of holes intersect.

With such a configuration, in the work of adjusting the direction of the radio wave sensor, the operator can check the reference point and the circumference of the reference point from a plurality of holes in each hole by looking into other holes from the holes close to his / her eyes. However, since the orientation of the sight can be adjusted, the orientation of the radio wave sensor can be adjusted more easily.

In addition, due to the configuration in which each hole has a somewhat complicated shape as described above, the operator looks into a plurality of holes as compared with the case where each hole has a simple shape such as a round shape. In some cases, the shapes of these plurality of holes can be easily matched, and the orientation of the radio wave sensor can be adjusted even more easily.

(6) Preferably, the main body portion can be attached to the support portion, and the sighting device can be attached to the opposite side of the mounting position of the support portion in the main body portion.

With such a configuration, workability when attaching the radio wave sensor to the support portion and when adjusting the direction of the radio wave sensor can be improved.

(7) The radio wave sensor according to the embodiment of the present invention is a radio wave sensor including a main body portion and an aiming device attached to the main body portion, and the aiming device is attached to the main body portion. The orientation of the aiming device is different from the radio wave irradiation direction of the radio wave sensor, and the angle formed by the orientation of the aiming device and the radio wave irradiation direction in the mounted state is the installation height of the radio wave sensor and the radio wave. It is set based on the horizontal distance from the sensor to the reference point.

With such a configuration, for example, even if it is difficult to specify the position near the center of the monitored area by the radio wave sensor, the aiming device can be oriented to a reference point at a position different from the center. It is possible to aim the radio wave sensor near the center. Therefore, the orientation of the radio wave sensor can be adjusted more easily.

(8) The adjustment method according to the embodiment of the present invention is the adjustment method of the radio wave sensor provided with the sight, the step of preparing the radio wave sensor, and the mounting state in which the sighting device is attached to the radio wave sensor. In the step of adjusting the direction of the radio wave sensor so that the direction of the sighting device matches the reference point by using the aiming device in which the direction of the aiming device is different from the radio wave irradiation direction of the radio wave sensor. include.

By such a method, for example, even if it is difficult to specify the position near the center of the monitored area by the radio wave sensor, the aiming device can be oriented to a reference point at a position different from the center. It is possible to aim the radio wave sensor near the center. Therefore, the orientation of the radio wave sensor can be adjusted more easily.

(9) Preferably, the reference point is located in an area including a boundary between the pedestrian crossing and the waiting area of the pedestrian crossing.

As described above, the direction of the radio wave sensor can be adjusted more easily by the method of adjusting the direction of the sighting device to the reference point located at the boundary between the pedestrian crossing and the standby area, which makes it easy to specify the position.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The same or corresponding parts in the drawings are designated by the same reference numerals and the description thereof will not be repeated. In addition, at least a part of the embodiments described below may be arbitrarily combined.

<First Embodiment>
[Configuration and basic operation]
(overall structure)
FIG. 1 is a diagram showing a configuration and a setting example of a radio wave sensor according to the first embodiment of the present invention.

With reference to FIG. 1, the radio wave sensor 201 is a radar installed in the roadside zone Rs including, for example, the standby area Wa1. The radio wave sensor 201 transmits radio waves to the target area, and detects an object existing in the target area, specifically a vehicle, a pedestrian, or the like, based on the reflected wave from the object in the target area. Here, it is assumed that the radio wave sensor 201 is attached to an arm (not shown) in the support column Pr provided in the roadside zone Rs near the pedestrian crossing Cr as an example of the support portion. Further, the target area is, for example, an area including a part or all of the pedestrian crossing Cr. Here, as an example, it is assumed that the target area is an area including the entire pedestrian crossing Cr.

The radio wave sensor 201 includes, for example, a box-shaped main body 101 and a sighting device 121 provided on the main body 101. The orientation of the radio wave sensor 201 is adjusted so that the entire pedestrian crossing Cr is included in the target area.

More specifically, the sighting device 121 is configured so that its own direction is different from the radio wave irradiation direction Dw of the radio wave sensor 201 in the mounted state attached to the main body portion 101. The operator adjusts the direction of the radio wave sensor 201 by adjusting the orientation of the sighting device 121 to the reference point in the mounted state of the aiming device 121.

(Structure of the main body)
FIG. 2 is a diagram showing a configuration of a main body portion of the radio wave sensor according to the first embodiment of the present invention.

With reference to FIG. 2, the main body 101 includes a communication unit 1, a control unit 2, and a radar unit 3. The communication unit 1 can communicate with the host device 151. The radar unit 3 includes a transmission unit 4, a reception unit 5, a difference signal generation unit 6, and a signal processing unit 7.

The control unit 2 repeatedly sets the unit sequence US1 and outputs the control signal Ss1 to the transmission unit 4 and the signal processing unit 7 in the radar unit 3 at the set start timing of the unit sequence US1. Further, the control unit 2 outputs the control signal Ss1 to the transmission unit 4 and the signal processing unit 7 in the radar unit 3 every time the repetition cycle Ts elapses from the start timing.

The radar unit 3 is, for example, Non-Patent Document 1 (Eugin Hyun, 2 outsiders, "A Pedestrian Detection A Coherent Phase Difference Method Method Based on 2D Range-Doppler", Vol. It operates according to the 2D Radar-Doppler FM-CW method described in .124).

The radar unit 3 is not limited to the above method, but is not limited to the above method, and is not limited to the above method. -48) and FM described in Non-Patent Document 3 (Takayuki Inaba, Tetsuro Kirimoto, "In-Vehicle Millimeter Wave Radar", Automotive Technology, February 2010, Vol. 64, No. 2, P.74-79). -CW method and dual frequency CW method, and non-patent document 4 (edited and published by the Society of Electronics, Information and Communication Engineers, supervised by Takashi Yoshida, "Revised Radar Technology", revised edition, Corona, October 1996, P275-276). It may operate according to the pulse compression method.

FIG. 3 is a diagram showing a configuration of a transmission unit in the radar unit of the radio wave sensor according to the embodiment of the present invention.

More specifically, with reference to FIG. 3, the transmission unit 4 in the radar unit 3 includes an array antenna unit 132, a plurality of power amplifiers 133, a plurality of variable phase detectors 134, a distributor 135, and a transmission circuit 136. And have. The array antenna unit 132 has a plurality of transmitting antenna elements 131.

When the transmission circuit 136 receives the control signal Ss1 from the control unit 2, the transmission circuit 136 generates a millimeter wave whose frequency increases uniformly from the frequency F2 to the frequency F1 in the repetition period Ts. Further, the transmission circuit 136 outputs the generated millimeter wave to the distributor 135 and the difference signal generation unit 6. The transmission circuit 136 may be configured to generate radio waves in other frequency bands such as quasi-millimeter waves near 24 GHz.

When the distributor 135 receives millimeter waves from the transmission circuit 136, the distributor 135 distributes the received millimeter waves to a plurality of variable phase detectors 134.

When each variable phase detector 134 receives the millimeter wave distributed from the distributor 135, the phase of the received millimeter wave is phase-shifted according to the control of the control unit 2, and the millimeter wave after the phase shift is supported by the power amplifier 133. Output to.

The power amplifier 133 amplifies the millimeter wave received from the corresponding variable phase detector 134, and outputs the amplified millimeter wave to the corresponding transmitting antenna element 131.

When the transmitting antenna element 131 receives a millimeter wave from the corresponding power amplifier 133, the transmitted antenna element 131 radiates the received millimeter wave to the target region.

With reference to FIG. 2 again, the receiving unit 5 receives the radio wave from the target area and outputs the received signal corresponding to the received radio wave to the difference signal generation unit 6.

The difference signal generation unit 6 generates a difference signal having a frequency component of the difference between the frequency component of the radio wave transmitted by the transmission unit 4 and the frequency component of the radio wave received by the reception unit 5.

More specifically, the difference signal generation unit 6 receives the received signal from the receiving unit 5, and uses the millimeter wave received from the transmitting unit 4 to down-convert the received received signal to each difference signal in the baseband band. To generate. Then, the difference signal generation unit 6 outputs each generated difference signal to the signal processing unit 7.

The signal processing unit 7 detects an object existing in the target area, for example, based on the radio wave received by the receiving unit 5.

More specifically, when the signal processing unit 7 receives the control signal Ss1 from the control unit 2, the signal processing unit 7 samples the difference signal received from the reception unit 5 at predetermined sampling cycles during the repetition period Ts, so that the difference signal can be obtained. Generate a time spectrum.

Further, the signal processing unit 7 generates a frequency spectrum FS by, for example, processing the time spectrum by FFT (Fast Fourier Transform). The vertical and horizontal axes of the frequency spectrum FS are amplitude and frequency, respectively.

The signal processing unit 7 has, for example, a dark spectrum which is a frequency spectrum measured in the absence of an object in the target region.

The signal processing unit 7 generates the processed frequency spectrum FS by subtracting the acquired dark spectrum from the frequency spectrum FS. Then, the signal processing unit 7 performs peak detection processing for detecting a peak having an amplitude equal to or higher than a predetermined threshold value in the generated processed frequency spectrum FS.

When the peak cannot be detected, the signal processing unit 7 transmits the detection result information indicating that the object does not exist in the target area to the host device 151 via the control unit 2 and the communication unit 1. On the other hand, when the signal processing unit 7 can detect the peak, the signal processing unit 7 transmits the detection result information indicating that the object exists in the target area to the host device 151 via the control unit 2 and the communication unit 1.

(Detailed configuration of the sight)
FIG. 4 is a side view showing the configuration of the radio wave sensor according to the first embodiment of the present invention. FIG. 5 is a perspective view showing the configuration of the sighting device according to the first embodiment of the present invention.

With reference to FIGS. 4 and 5, the main body 101 of the radio wave sensor 201 includes a front surface 10, a back surface 11, a bottom surface 12, and a top surface 13. For example, the upper surface 13 side of the main body 101 is attached to the arm.

Further, the main body 101 has, for example, a rectangular parallelepiped shape. Hereinafter, the axis parallel to the straight line passing through the center of the front surface 10 and the center of the back surface 11 is defined as the X axis, and the axis parallel to the straight line passing through the center of the bottom surface 12 and the center of the top surface 13 is defined as the Z axis. Let the orthogonal axis be the Y axis.

The sighting device 121 can be mounted, for example, on the opposite side of the mounting position of the arm in the main body 101, that is, on the bottom surface 12. The sighting device 121 includes a first plate-shaped member 21, a second plate-shaped member 22, a plate-shaped connecting member 23 for connecting the first plate-shaped member 21 and the second plate-shaped member 22, and a plate-shaped first plate-shaped member. It includes one mounting member 24, a plate-shaped second mounting member 25, one or more first fixing members 26, and one or more second fixing members 27. The first fixing member 26 and the second fixing member 27 are, for example, screws.

The main surface of each of the first plate-shaped member 21 and the second plate-shaped member 22 is parallel to the front surface 10 of the main body 101. The first plate-shaped member 21 is formed with a first hole 31, and the second plate-shaped member 22 is formed with a second hole 32. As shown in FIG. 5, the first hole 31 and the second hole 32 have, for example, a shape in which a plurality of holes intersect, specifically, a cross shape. Each of the plurality of holes constituting the first hole 31 and the plurality of holes constituting the second hole 32 is hereinafter referred to as "element hole".

The first hole 31 and the second hole 32 are such that when the operator looks into the first hole 31 and the second hole 32 and sees the reference point, the reference point and the periphery of the reference point can be visually recognized. The size is preferable.

Further, each of the plurality of element holes in the first hole 31 and the plurality of element holes in the second hole 32 has, for example, a vertically long shape. Specifically, each element hole has a rectangular or flat shape, and the length in the longitudinal direction is at least twice the length in the lateral direction, preferably three times the length in the lateral direction. ~ 5 times.

FIG. 6 is a diagram showing a detailed configuration of a first plate-shaped member in the sight according to the first embodiment of the present invention.

With reference to FIG. 6, the first hole 31 formed in the first plate-shaped member 21 is a first lateral hole 31a which is an element hole extending along the Y axis and a first element hole extending along the Z axis. It has one vertical hole 31b.

The length in the Y-axis direction and the length in the Z-axis direction in the first horizontal hole 31a are the lengths La2 and La1, respectively. The length in the Y-axis direction and the length in the Z-axis direction in the first vertical hole 31b are the lengths La1 and La2, respectively.

Specifically, the first plate-shaped member 21 has a length of 80 mm in the Y-axis direction and a length of 40 mm in the Z-axis direction. The length La1 is 3 mm and the length La2 is 14 mm. Further, the distance La3 between the substantially center of the first vertical hole 31b in the Z-axis direction and the bottom surface 12 of the main body portion 101 shown in FIG. 4 is, for example, 21 mm.

FIG. 7 is a diagram showing a detailed configuration of a second plate-shaped member in the sight according to the first embodiment of the present invention.

With reference to FIG. 7, the second hole 32 formed in the second plate-shaped member 22 has a second horizontal hole 32a extending along the Y axis and a second vertical hole 32b extending along the Z axis.

The length in the Y-axis direction and the length in the Z-axis direction in the second horizontal hole 32a are the lengths Lb2 and Lb1, respectively. The length in the Y-axis direction and the length in the Z-axis direction in the second vertical hole 32b are the lengths Lb1 and Lb2, respectively.

Specifically, the second plate-shaped member 22 has a length of 80 mm in the Y-axis direction and a length of 40 mm in the Z-axis direction. The length Lb1 is 4 mm and the length Lb2 is 15 mm. Further, the distance Lb3 between the substantially center of the second vertical hole 32b in the Z-axis direction and the bottom surface 12 of the main body portion 101 shown in FIG. 4 is, for example, 15 mm.

The first hole 31 and the second hole 32 are not limited to a cross shape, and may have, for example, a round shape, a quadrangular shape, or another shape in which two or more element holes intersect.

With reference to FIGS. 4 and 5 again, the first mounting member 24 is connected to the first plate-shaped member 21. The first mounting member 24 is formed with one or a plurality of screw holes 36. Here, it is assumed that there are two first fixing members 26, and two screw holes 36 are formed in the first mounting member 24.

The second mounting member 25 is connected to the second plate-shaped member 22. The second mounting member 25 is formed with one or a plurality of screw holes 37. Here, it is assumed that there are two second fixing members 27, and two screw holes 37 are formed in the second mounting member 25.

In a state where the main surface of the first mounting member 24 and the main surface of the second mounting member 25 are in contact with the bottom surface 12 of the main body 101, the two first fixing members 26 are inserted into the two screw holes 36, respectively. It is screwed into the main body 101, and the two second fixing members 27 are inserted into the two screw holes 37 and screwed into the main body 101. As a result, the sighting device 121 can be attached to the main body 101.

As described above, the second hole 32 formed in the second plate-shaped member 22 is larger than the first hole 31 formed in the first plate-shaped member 21. As a result, when the operator looks into the second hole 32 from the first hole 31 in the mounted state of the sighting device 121, the first hole 31 and the second hole 32 appear to be substantially the same size, so that visibility is improved. Can be improved. The first hole 31 and the second hole 32 may have the same size.

The radio wave irradiation direction Dw of the radio wave sensor 201 is the irradiation direction of the radio wave transmitted from the radio wave sensor 201, for example, the normal direction of the antenna surface which is the surface of the substrate on which the transmission antenna element 131 is arranged. Here, it is assumed that the radio wave irradiation direction Dw of the radio wave sensor 201 is the direction in which the normal line of the front surface 10 of the main body 101 extends and is the direction along the X axis.

Here, the orientation of the sighting device 121, that is, the extending direction of the straight line G1 passing through the first hole 31 and the second hole 32 is determined by the relative positions of the first hole 31 and the second hole 32.

More specifically, the distance La3 between the substantially center of the first hole 31 and the bottom surface 12 in the mounted state of the sighting device 121 is different from the distance Lb3 between the substantially center of the second hole 32 and the bottom surface 12. The distance La3 is larger than the distance Lb3 (La3> Lb3). Therefore, in the mounted state of the sighting device 121, the orientation of the aiming device 121 is different from the radio wave irradiation direction Dw of the radio wave sensor 201.

Assuming that the angle formed by the straight line G1 indicating the direction of the aiming device 121 in the mounted state of the aiming device 121 and the radio wave irradiation direction Dw of the radio wave sensor 201 is θ, the angle θ is the installation height of the radio wave sensor 201 and the radio wave sensor 201. It is set based on the horizontal distance from to the reference point.

Specifically, referring to FIG. 1 again, it is assumed that the radio wave sensor 201 is attached to the arm of the support column Pr provided at the position of the distance L2 from the first end A1 of the pedestrian crossing Cr. Further, it is assumed that the installation height of the radio wave sensor 201 is H.

Further, the optimum depression angle of the radio wave sensor 201, that is, the angle formed by the radio wave irradiation direction Dw of the radio wave sensor 201 and the horizontal plane when the entire pedestrian crossing Cr of length L1 is included in the target region is α. Further, a mark located in the area including the boundary between the pedestrian crossing Cr and the waiting area Wa2 of the pedestrian crossing Cr, for example, the second end A2 of the pedestrian crossing Cr is used as a reference point.

At this time, the angle θ formed by the orientation of the sighting device 121 and the radio wave irradiation direction Dw of the radio wave sensor 201 in the mounted state of the sighting device 121 is set so as to satisfy the equation θ = α-arctan (H / (L1 + L2)). Will be done.

Specifically, the angle α, which is the optimum depression angle of the radio wave sensor 201, is 13 °, the installation height H of the radio wave sensor 201 is 4.5 m, the length L1 of the pedestrian crossing Cr is 30 m, and the crosswalk is crossed. It is assumed that the distance L2 from the first end A1 of the sidewalk Cr to the support column Pr is 6 m. That is, it is assumed that the horizontal distance (L1 + L2) from the radio wave sensor 201 to the second end A2, which is the reference point, is 36 m. In this case, the angle θ is set to be 6 °.

Therefore, the operator can adjust the radio wave sensor 201 to an appropriate direction by adjusting the orientation of the sighting device 121 to the second end A2 in the mounted state of the aiming device 121.

The radio wave sensor 201 is not limited to the radar, and may be, for example, a device that detects an object using infrared rays.

Further, in the sighting device 121, in addition to the two plate-shaped members of the first plate-shaped member 21 and the second plate-shaped member 22, the plate-shaped member having a hole parallel to the front surface 10 of the main body 101 is formed. It may be configured to further include.

Further, the sighting device 121 may be mounted on the mounting position side of the support portion in the main body portion 101, that is, on the upper surface 13.

Further, the sighting device 121 may have a direction in which its own direction and the radio wave irradiation direction Dw of the radio wave sensor 201 are different from each other in the mounted state of the sighting device 121, and a plurality of plate-shaped members 21 and 22 having holes formed therein may be used. It is not limited to the configuration to be provided. For example, the sighting device 121 may include a member having a groove formed therein, and may be configured so that the extending direction of the groove and the radio wave irradiation direction Dw of the radio wave sensor 201 are in different directions.

[Flow of angle adjustment work]
FIG. 8 is a flowchart showing an example of the flow of the angle adjustment work of the radio wave sensor according to the first embodiment of the present invention.

With reference to FIG. 8, the operator first prepares the radio wave sensor 201 (step S11).

Next, the operator attaches the radio wave sensor 201 to the arm, looks into the second hole 32 from the first hole 31, and aligns the orientation of the sighting device 121 with the reference point (step S12). As a result, the orientation of the radio wave sensor 201 can be adjusted so that the angle formed by the radio wave irradiation direction Dw of the radio wave sensor 201 and the horizontal plane becomes an optimum value.

By the way, it is necessary to accurately direct the direction of the radio wave sensor as described in Patent Document 1 to the target area including the pedestrian crossing, etc., in consideration of the directivity of the antenna in the radio wave sensor, the range of the target area, and the like.

However, while the image sensor allows the operator to adjust the orientation of the image sensor while checking the captured image, the radio wave sensor does not allow the operator to visually recognize the target area. In many cases, there is no marker near the center of the target area where the radio wave sensor should be oriented. Therefore, it is difficult to accurately orient the radio wave sensor toward the target area, and there is a problem that the adjustment work requires a lot of time.

On the other hand, in the sighting device 121 according to the first embodiment of the present invention, the orientation of the sighting device 121 is the radio wave sensor 201 in the mounted state in which the sighting device 121 is attached to the main body 101 of the radio wave sensor 201. It is configured to be in a direction different from the radio wave irradiation direction Dw. Further, the angle θ formed by the orientation of the sighting device 121 and the radio wave irradiation direction Dw of the radio wave sensor 201 in the mounted state of the sighting device 121 is the installation height of the radio wave sensor 201 and the horizontal distance from the radio wave sensor 201 to the reference point. It is set based on.

With such a configuration, for example, even if it is difficult to specify the position near the center of the monitored area by the radio wave sensor 201, the aiming device 121 is oriented to a reference point at a position different from the center. This makes it possible to aim the radio wave sensor 201 near the center.

Therefore, in the sighting device 121 according to the first embodiment of the present invention, the orientation of the radio wave sensor 201 can be adjusted more easily.

Further, the sighting device 121 according to the first embodiment of the present invention includes a first plate-shaped member 21 and a second plate-shaped member 22. The first plate-shaped member 21 is formed with a first hole 31, and the second plate-shaped member 22 is formed with a second hole 32. The orientation of the sighting device 121 is determined by the relative positions of the first hole 31 and the second hole 32.

With such a configuration, it is possible to realize a sighting device 121 capable of aiming itself in a direction different from the radio wave irradiation direction Dw of the radio wave sensor 201 with a simple configuration. Further, with such a simple configuration, the sighting device 121 can be easily manufactured.

Further, in the sighting device 121 according to the first embodiment of the present invention, the sizes of the first hole 31 and the second hole 32 are different from each other.

With such a configuration, in the work of adjusting the orientation of the radio wave sensor 201, for example, when the first hole 31 close to the operator's eyes is smaller than the second hole 32, the worker moves the first hole 31 to the second hole 32. Since the sizes of the first hole 31 and the second hole 32 look substantially the same when viewed, the visibility can be improved.

Further, in the sighting device 121 according to the first embodiment of the present invention, the first hole 31 and the second hole 32 have a shape in which a plurality of element holes intersect.

With such a configuration, in the work of adjusting the orientation of the radio wave sensor 201, the operator looks into the second hole 32 from the first hole 31 to refer to the plurality of element holes in the first hole 31 and the second hole 32. Since the orientation of the sighting device 121 can be adjusted while checking the periphery of the point and the reference point, the orientation of the radio wave sensor 201 can be adjusted more easily.

Further, due to the configuration in which the first hole 31 and the second hole 32 have a somewhat complicated shape as described above, the first hole 31 and the second hole 32 have a simple shape such as a round shape. Compared with the case, when the operator looks into the second hole 32 from the first hole 31, it is easier to match the shapes of the first hole 31 and the second hole 32, and the direction of the radio wave sensor 201 is adjusted more easily. Can be done.

Further, in the sighting device 121 according to the first embodiment of the present invention, the sighting device 121 can be mounted on the opposite side of the mounting position of the support portion in the main body portion 101.

With such a configuration, workability when attaching the radio wave sensor 201 to the support portion and when adjusting the orientation of the radio wave sensor 201 can be improved.

Further, the radio wave sensor 201 according to the first embodiment of the present invention includes a main body portion 101 and a sighting device 121 attached to the main body portion 101. In the mounted state of the sighting device 121, the direction of the aiming device 121 is different from the radio wave irradiation direction Dw of the radio wave sensor 201. Further, the angle θ formed by the orientation of the sighting device 121 and the radio wave irradiation direction Dw in the mounted state of the sighting device 121 is set based on the installation height of the radio wave sensor 201 and the horizontal distance from the radio wave sensor 201 to the reference point. ing.

With such a configuration, for example, even if it is difficult to specify the position near the center of the monitored area by the radio wave sensor 201, the aiming device 121 is oriented to a reference point at a position different from the center. This makes it possible to aim the radio wave sensor 201 near the center.

Therefore, in the radio wave sensor 201 according to the first embodiment of the present invention, the orientation of the radio wave sensor 201 can be adjusted more easily.

Further, in the method of adjusting the radio wave sensor 201 provided with the sighting device 121 according to the first embodiment of the present invention, the operator first prepares the radio wave sensor 201. Next, the operator uses the sighting device 121 in which the direction of the sighting device 121 is different from the radio wave irradiation direction Dw of the radio wave sensor 201 when the sighting device 121 is attached to the radio wave sensor 201. The direction of the radio wave sensor 201 is adjusted so that the direction matches the reference point.

By such a method, for example, even if it is difficult to specify the position near the center of the monitored area by the radio wave sensor 201, the aiming device 121 is oriented to a reference point at a position different from the center. This makes it possible to aim the radio wave sensor 201 near the center.

Therefore, in the adjustment method of the radio wave sensor 201 provided with the sighting device 121 according to the first embodiment of the present invention, the orientation of the radio wave sensor 201 can be adjusted more easily.

Further, in the adjustment method of the radio wave sensor 201 provided with the sighting device 121 according to the first embodiment of the present invention, the reference point is located in the region including the boundary between the pedestrian crossing Cr and the standby area of the pedestrian crossing Cr. do.

In this way, the direction of the radio wave sensor 201 can be adjusted more easily by the method of aligning the aiming device 121 with the reference point located at the boundary between the pedestrian crossing Cr and the standby area, which makes it easy to specify the position. Can be done.

Next, other embodiments of the present invention will be described with reference to the drawings. The same or corresponding parts in the drawings are designated by the same reference numerals and the description thereof will not be repeated.

<Second embodiment>
In the radio wave sensor 201 according to the first embodiment described above, the angle θ formed by the orientation of the sighting device 121 and the radio wave irradiation direction Dw of the radio wave sensor 201 is a constant value in the mounted state of the sighting device 121. On the other hand, in the radio wave sensor 202 according to the second embodiment, the angle θ formed by the orientation of the sighting device 122 and the radio wave irradiation direction Dw of the radio wave sensor 202 is variable in the mounted state of the sighting device 122. Except for the contents described below, it is the same as the radio wave sensor 201 according to the first embodiment.

[Configuration and basic operation]
FIG. 9 is a side view showing the configuration of the radio wave sensor according to the second embodiment of the present invention. FIG. 10 is a perspective view of the radio wave sensor according to the second embodiment of the present invention.

With reference to FIGS. 9 and 10, the sighting device 122 according to the second embodiment of the present invention can be attached to the bottom surface 12 of the main body 101, and has a first plate-shaped member 41 and a second plate-shaped member 41. It includes a member 42, a plate-shaped first mounting member 43, a plate-shaped second mounting member 44, one or more first fixing members 45, and one or more second fixing members 46. The first fixing member 45 and the second fixing member 46 are, for example, screws.

The main surface of each of the first plate-shaped member 41 and the second plate-shaped member 42 is parallel to the front surface 10 of the main body 101. The first plate-shaped member 41 is formed with a first hole 51, and the second plate-shaped member 42 is formed with a second hole 52.

In FIGS. 9 and 10, the first hole 51 and the second hole 52 have a quadrangular shape as an example, but have a round shape or a shape in which a plurality of element holes such as a cross shape intersect. You may.

Further, as shown in FIG. 10, the distance La4 between the substantially center of the first hole 51 and the bottom surface 12 of the main body 101 is different from the distance Lb4 between the substantially center of the second hole 52 and the bottom surface 12. , The distance La4 is larger than the distance Lb4. Further, the second hole 52 has the same size as the first hole 51 or is larger than the first hole 51.

The first mounting member 43 is connected to the first plate-shaped member 41. The first mounting member 43 is formed with one or a plurality of screw holes 53 penetrating the main surface of the first mounting member 43. Here, the first fixing member 45 is one, and one screw hole 53 is formed in the first mounting member 43.

As shown in FIG. 10, the second mounting member 44 is formed with a notch 54 extending along the X-axis direction.

With the main surface of the first mounting member 43 and the main surface of the second mounting member 44 in contact with the bottom surface 12 of the main body 101, the first fixing member 45 is inserted into the screw hole 53 and screwed into the main body 101. The second fixing member 46 is inserted through the notch 54 and screwed into the main body 101. As a result, the sighting device 122 can be attached to the main body 101.

The second mounting member 44 is connected to the second plate-shaped member 42. Further, the second plate-shaped member 42 and the second mounting member 44 can move along the direction of the arrow X1 so that the second fixing member 46 moves along the notch portion 54.

That is, as the second plate-shaped member 42 and the second mounting member 44 move along the direction of the arrow X1, the distance Lh between the first hole 51 and the second hole 52 changes. Then, by changing the interval Lh in this way, in the mounted state of the sighting device 122, the direction of the aiming device 122, that is, the straight line G2 passing through the first hole 51 and the second hole 52, and the radio wave irradiation of the radio wave sensor 202. The angle θ formed with the direction Dw changes.

More specifically, as shown in FIG. 10, a first scale S1 is attached to the bottom surface 12 of the main body 101. For example, the operator grasps in advance the correspondence between the plurality of scale lines in the first scale S1 and the value of the angle θ. Then, the operator moves the second plate-shaped member 42 and the second mounting member 44 with reference to the corresponding relationship so that the angle θ becomes an appropriate value according to the installation conditions of the radio wave sensor 202. Can be set to.

[Flow of angle adjustment work]
FIG. 11 is a flowchart showing an example of the flow of the angle adjustment work of the radio wave sensor according to the second embodiment of the present invention.

With reference to FIG. 11, first, the operator prepares the radio wave sensor 202 (step S21).

Next, the operator calculates the angle θ based on the installation conditions of the radio wave sensor 202, specifically, the installation height of the radio wave sensor 202, and the horizontal distance from the radio wave sensor 202 to the reference point, and the first scale S1. Of the scale lines in the above, the scale line corresponding to the calculated angle θ is specified (step S22).

Next, the operator moves the second plate-shaped member 42 and the second mounting member 44 so that, for example, the end portion 42a of the second plate-shaped member 42 conforms to the specified scale line (step S23).

Next, the operator attaches the radio wave sensor 202 to the arm, looks into the second hole 52 from the first hole 51, and aligns the orientation of the sighting device 122 with the reference point (step S24). As a result, the orientation of the radio wave sensor 202 can be adjusted so that the angle formed by the radio wave irradiation direction Dw of the radio wave sensor 202 and the horizontal plane becomes an optimum value.

Since other configurations and operations are the same as those of the radio wave sensor 201 according to the first embodiment of the present invention, detailed description thereof will not be repeated here.

As described above, in the sighting device 122 according to the second embodiment of the present invention, the distance between the first hole 51 and the second hole 52 can be changed in the mounted state.

With such a configuration, the orientation of the sighting device 122 can be changed to an appropriate direction according to the installation conditions of the radio wave sensor 202. Therefore, for example, the same sighting device 122 can be used for a plurality of radio wave sensors 202 having different installation conditions such as the installation height and the horizontal distance to the reference point.

<Third embodiment>
In the radio wave sensor 202 according to the second embodiment described above, the orientation of the sighting device 122 and the radio wave sensor 202 in the mounted state of the sighting device 122 are changed by changing the distance Lh between the first hole 51 and the second hole 52. The angle θ formed with the radio wave irradiation direction Dw is changed.

On the other hand, in the radio wave sensor 203 according to the third embodiment, the angle θ is changed by changing the distance Lb5 between the second hole 72 and the bottom surface 12 of the main body 101. Except for the contents described below, it is the same as the radio wave sensor 201 according to the first embodiment.

[Configuration and basic operation]
FIG. 12 is a side view showing the configuration of the radio wave sensor according to the third embodiment of the present invention. FIG. 13 is a perspective view showing the configuration of the sighting device according to the third embodiment of the present invention.

With reference to FIGS. 12 and 13, the sighting device 123 according to the third embodiment of the present invention can be attached to the bottom surface 12 of the main body 101, and has a first plate-shaped member 61 and a second plate-shaped member 61. Member 62, third plate-shaped member 63, plate-shaped first mounting member 64, plate-shaped second mounting member 65, one or more first fixing members 66, and one or more second fixings. Includes member 67. The first fixing member 66 and the second fixing member 67 are, for example, screws.

FIG. 13 shows the first plate-shaped member 61, the second plate-shaped member 62, and the third plate-shaped member 63 in the sighting device 123.

The main surface of each of the first plate-shaped member 61 and the second plate-shaped member 62 is parallel to the front surface 10 of the main body 101. A first hole 71 is formed in the first plate-shaped member 61.

The second plate-shaped member 62 is movably attached to the third plate-shaped member 63 in the direction along the Z axis as shown by the arrow Z1 shown in FIG. Further, a second hole 72 is formed in the second plate-shaped member 62. The third plate-shaped member 63 is formed with a third hole 73 extending in the Z-axis direction.

In FIGS. 12 and 13, the first hole 71, the second hole 72, and the third hole 73 have a quadrangular shape as an example, but a plurality of element holes such as a round shape or a cross shape are formed. It may have an intersecting shape. The third hole 73 is larger than the second hole 72, and a part of the third hole 73 and the second hole 72 overlap each other. Further, the second hole 72 has the same size as the first hole 71 or is larger than the first hole 71.

The first mounting member 64 is connected to the first plate-shaped member 61. The first mounting member 64 is formed with one or a plurality of screw holes 74. Here, the first fixing member 66 is one, and one screw hole 74 is formed in the first mounting member 64.

The second mounting member 65 is connected to the third plate-shaped member 63. The second mounting member 65 is formed with one or more screw holes 75. Here, there is only one second fixing member 67, and one screw hole 75 is formed in the second mounting member 65.

With the main surface of the first mounting member 64 and the main surface of the second mounting member 65 in contact with the bottom surface 12 of the main body 101, the first fixing member 66 is inserted into the screw hole 74 and screwed into the main body 101. The second fixing member 67 is inserted into the screw hole 75 and screwed into the main body 101. As a result, the sighting device 123 can be attached to the main body 101.

Further, as described above, the second plate-shaped member 62 is attached to the third plate-shaped member 63 so as to be movable in the direction along the Z axis. Then, as shown in FIG. 13, the second plate-shaped member 62 moves with respect to the third plate-shaped member 63 along the direction of the arrow Z1 to form a second hole 72 in the second plate-shaped member 62. The distance Lb5 from the bottom surface 12 of the main body 101 changes.

Then, as the distance Lb5 changes, the angle θ formed by the straight line G3 passing through the first hole 71 and the second hole 72 and the radio wave irradiation direction Dw of the radio wave sensor 203 changes in the mounted state of the sighting device 123.

More specifically, as shown in FIG. 13, a second scale S2 is provided in the vicinity of the third hole 73 in the third plate-shaped member 63. For example, the operator grasps in advance the correspondence between the plurality of scale lines in the second scale S2 and the value of the angle θ. Then, the operator moves the second plate-shaped member 62 along the arrow Z1 with reference to the correspondence so that the angle θ becomes an appropriate value according to the installation condition of the radio wave sensor 202. Can be set.

[Flow of angle adjustment work]
FIG. 14 is a flowchart showing an example of the flow of the angle adjustment work of the radio wave sensor according to the third embodiment of the present invention.

With reference to FIG. 14, the operator first prepares the radio wave sensor 203 (step S31).

Next, the operator calculates the angle θ based on the installation conditions of the radio wave sensor 202, specifically, the installation height of the radio wave sensor 203, and the horizontal distance from the radio wave sensor 203 to the reference point, and the second scale S2. Among the plurality of scale lines in the above, the scale line corresponding to the calculated angle θ is specified (step S32).

Next, the operator moves the second plate-shaped member 62 so that, for example, the end portion 62a of the second plate-shaped member 62 aligns with the specified scale line (step S33).

Next, the operator attaches the radio wave sensor 203 to the arm, looks into the second hole 72 from the first hole 71, and aligns the orientation of the sighting device 123 with the reference point (step S34). As a result, the orientation of the radio wave sensor 202 can be adjusted so that the angle formed by the radio wave irradiation direction Dw of the radio wave sensor 202 and the horizontal plane becomes an optimum value.

Since other configurations and operations are the same as those of the radio wave sensor 201 according to the first embodiment of the present invention, detailed description thereof will not be repeated here.

As described above, in the sighting device 123 according to the third embodiment of the present invention, the distance Lb5 from the main body portion 101 of the second hole 72 can be changed in the mounted state.

With such a configuration, the orientation of the sighting device 123 can be changed to an appropriate direction according to the installation conditions of the radio wave sensor 203. Therefore, for example, the same sighting device 123 can be used for a plurality of radio wave sensors 203 having different installation conditions such as an installation height and a horizontal distance to a reference point.

[Modification example]
FIG. 15 is a side view showing a configuration of a radio wave sensor according to a modified example of the third embodiment of the present invention. FIG. 16 is a perspective view showing the configuration of a sighting device according to a modified example of the third embodiment of the present invention.

With reference to FIGS. 15 and 16, the sighting device 124 in the radio wave sensor 204 according to the modification of the third embodiment of the present invention does not include the second plate-shaped member 62, but is shown in FIG. It has the same configuration as the aiming device 123 shown. FIG. 16 shows the first plate-shaped member 61 and the third plate-shaped member 63 in the sighting device 124.

FIG. 17 is a flowchart showing an example of the flow of the angle adjustment work of the radio wave sensor according to the modified example of the third embodiment of the present invention.

With reference to FIG. 17, first, the operator prepares the radio wave sensor 204 (step S41).

Next, the operator calculates the angle θ based on the installation conditions of the radio wave sensor 202, specifically, the installation height of the radio wave sensor 204, and the horizontal distance from the radio wave sensor 204 to the reference point, and the second scale S2. Among the plurality of scale lines in the above, the scale line corresponding to the calculated angle θ is specified (step S42).

Next, the operator attaches the radio wave sensor 203 to the arm, looks into the third hole 73 from the first hole 71, and makes the reference point located on the extension line of the specified scale line in the third hole 73, for example. , Align the orientation of the sighting device 124 with the reference point (step S43). As a result, the orientation of the radio wave sensor 203 can be adjusted so that the angle formed by the radio wave irradiation direction Dw of the radio wave sensor 203 and the horizontal plane becomes an optimum value.

Since other configurations and operations are the same as those of the radio wave sensor 201 according to the first embodiment of the present invention, detailed description thereof will not be repeated here.

<Fourth Embodiment>
In the radio wave sensor 205 according to the fourth embodiment of the present invention, by changing the inclination of the sighting device 125 with respect to the main body 101, as in the radio wave sensor 203 according to the third embodiment described above, the first The distance La6 between the hole 91 and the bottom surface 12 of the main body 101 is changed. As a result, the angle θ formed by the orientation of the sighting device 125 and the radio wave irradiation direction Dw of the radio wave sensor 205 in the mounted state of the sighting device 125 is changed. Except for the contents described below, it is the same as the radio wave sensor 201 according to the first embodiment.

[Configuration and basic operation]
FIG. 18 is a side view showing the configuration of the radio wave sensor according to the fourth embodiment of the present invention. FIG. 19 is a perspective view showing a configuration of a radio wave sensor according to a fourth embodiment of the present invention.

With reference to FIGS. 18 and 19, the sighting device 125 according to the fourth embodiment of the present invention can be attached to the bottom surface 12 of the main body 101, and has a first plate-shaped member 81 and a second plate-shaped member 81. A member 82, a third plate-shaped member 83, a plate-shaped angle adjusting member 84, and a fixing member 85 are included. The fixing member 85 is, for example, a screw.

The first plate-shaped member 81 is formed with a first hole 91, and the second plate-shaped member 82 is formed with a second hole 92. In FIGS. 18 and 19, the first hole 91 and the second hole 92 have a quadrangular shape as an example, but have a round shape or a shape in which a plurality of element holes such as a cross shape intersect. You may. Further, the second hole 92 has the same size as the first hole 91 or is larger than the first hole 91.

The third plate-shaped member 83 connects the first plate-shaped member 81 and the second plate-shaped member 82.

Further, the second plate-shaped member 82 is rotatably attached to the bottom surface 12 of the main body 101, centering on the end 82a on the main body 101 side. The second plate-shaped member 82, the third plate-shaped member 83, and the first plate-shaped member 81 are aimed at the main body portion 101 by rotating the second plate-shaped member 82, the third plate-shaped member 83, and the first plate-shaped member 81 around the end portion 82a in the direction of the arrow B shown in FIG. The inclination of the vessel 125 can be changed.

Then, as the inclination of the sighting device 125 with respect to the main body 101 changes, the distance La6 between the first hole 91 and the bottom surface 12 of the main body 101 changes. Then, as the distance La6 changes, the angle θ formed by the straight line G5 passing through the first hole 91 and the second hole 92 and the radio wave irradiation direction Dw of the radio wave sensor 205 changes in the mounted state of the sighting device 125.

More specifically, as shown in FIG. 19, the angle adjusting member 84 has, for example, centered on the end portion 82a of the second plate-shaped member 82, and the distance between the first plate-shaped member 81 and the second plate-shaped member 82. It has a fan shape with Lh as the radius. For example, a plurality of screw holes 94 are formed in the vicinity of the arc portion of the angle adjusting member 84.

Further, the angle adjusting member 84 is provided with a third scale S3 in the vicinity of the arc portion. The plurality of scale lines in the third scale S3 are formed at positions corresponding to the plurality of screw holes 94, respectively.

For example, the operator grasps in advance the correspondence between the plurality of scale lines in the third scale S3 and the value of the angle θ. Then, the operator can use any one of the plurality of screw holes 94 and the end of the first plate-shaped member 81 on the main body 101 side based on the correspondence between the third scale S3 and the value of the angle θ. The fixing member 85 is inserted into a hole (not shown) formed in the portion 81a. As a result, the tilt of the sighting device 125 with respect to the main body 101 can be maintained.

[Flow of angle adjustment work]
FIG. 20 is a flowchart showing an example of the flow of the angle adjustment work of the radio wave sensor according to the fourth embodiment of the present invention.

With reference to FIG. 20, first, the operator prepares the radio wave sensor 205 (step S51).

Next, the operator calculates the angle θ based on the installation conditions of the radio wave sensor 205, specifically, the installation height of the radio wave sensor 205, and the horizontal distance from the radio wave sensor 205 to the reference point, and the third scale S3. Among the plurality of scale lines in the above, the scale line corresponding to the calculated angle θ is specified (step S52).

Next, the operator can use the sight 125 with respect to the main body 101 so that, for example, the hole formed in the end 81a of the first plate-shaped member 81 and the screw hole 94 corresponding to the specified scale line match. Adjust the tilt. Then, the operator maintains the inclination of the sight 125 by inserting the fixing member 85 into the hole formed in the end portion 81a and the screw hole 94 corresponding to the specified scale line (step S53).

Next, the operator attaches the radio wave sensor 205 to the arm, looks into the second hole 92 from the first hole 91, and aligns the orientation of the sighting device 125 with the reference point (step S54). As a result, the orientation of the radio wave sensor 205 can be adjusted so that the angle formed by the radio wave irradiation direction Dw of the radio wave sensor 205 and the horizontal plane becomes an optimum value.

Since other configurations and operations are the same as those of the radio wave sensor 201 according to the first embodiment of the present invention, detailed description thereof will not be repeated here.

As described above, in the sighting device 125 according to the fourth embodiment of the present invention, the distance La6 of the first hole 91 from the main body 101 can be changed in the mounted state.

With such a configuration, the orientation of the sighting device 125 can be changed to an appropriate direction according to the installation conditions of the radio wave sensor 205. Therefore, for example, the same sighting device 125 can be used for a plurality of radio wave sensors 205 having different installation conditions such as an installation height and a horizontal distance to a reference point.

The radio wave sensor 201 according to the first embodiment of the present invention, the radio wave sensor 202 according to the second embodiment, the radio wave sensor 203 according to the third embodiment, and modified examples of the third embodiment. It is also possible to appropriately combine the features of the radio wave sensor 204 according to the above and the radio wave sensor 205 according to the fourth embodiment.

It should be considered that the above embodiments are exemplary in all respects and not restrictive. The scope of the present invention is shown by the scope of claims rather than the above description, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

The above description includes the features described below.
[Appendix 1]
A sighting device used for radio wave sensors
In the mounted state in which the sight is attached to the main body of the radio wave sensor, the direction of the sight is different from the radio wave irradiation direction of the radio wave sensor.
The angle formed by the orientation of the sight and the radio wave irradiation direction in the mounted state is set based on the installation height of the radio wave sensor and the horizontal distance from the radio wave sensor to the reference point.
The radio wave sensor is a radar that detects an object existing in a target area including the entire pedestrian crossing.
The reference point is a sighting device, which is an end of the pedestrian crossing on the waiting area side.

[Appendix 2]
With the main body
A radio wave sensor including a sighting device attached to the main body.
In the mounted state in which the sight is attached to the main body, the direction of the sight is different from the radio wave irradiation direction of the radio wave sensor.
The angle formed by the orientation of the sight and the radio wave irradiation direction in the mounted state is set based on the installation height of the radio wave sensor and the horizontal distance from the radio wave sensor to the reference point.
The radio wave sensor is a radar installed in a roadside zone including a standby area and detects an object existing in a target area including the entire pedestrian crossing.
The reference point is a radio wave sensor at the end of the pedestrian crossing on the standby area side.

1 Communication unit 2 Control unit 3 Radar unit 4 Transmission unit 5 Reception unit 6 Difference signal generation unit 7 Signal processing unit 10 Front 11 Back 12 Bottom 13 Top surface 21, 41, 61, 81 First plate-shaped member 22, 42, 62, 82 2nd plate-shaped member 23 Connecting member 24,43,64 1st mounting member 25,44,65 2nd mounting member 26,45,66 1st fixing member 27,46,67 2nd fixing member 31,51,71 , 91 1st hole 31a 1st horizontal hole 31b 1st vertical hole 32, 52, 72, 92 2nd hole 32a 2nd horizontal hole 32b 2nd vertical hole 36, 37, 53, 74, 75, 94 Screw hole 54 Notch 63, 83 Third plate-shaped member 73 Third hole 42a, 62a, 81a, 82a End part 84 Angle adjustment member 85 Fixing member 101 Main body part 121, 122, 123, 124, 125 Aiming device 131 Transmitting antenna element 132 Array antenna part 133 Power Amplifier 134 Variable phase device 135 Distributor 136 Transmission circuit 151 Upper device 201, 202, 203, 204, 205 Radio sensor

Claims (8)

It is a sighting device attached to the main body of the radio wave sensor.
Wherein the sight is mounted being attached to the body portion, the orientation of the sight becomes radio wave radiating direction different from the direction of the radio wave sensor,
The angle formed by the orientation of the sight and the radio wave irradiation direction in the mounted state is set based on the installation height of the radio wave sensor and the horizontal distance from the radio wave sensor to the reference point .
The sighting device includes a plurality of plate-shaped members, and the sighting device has a plurality of plate-shaped members.
A hole is formed in each of the plate-shaped members, and the orientation of the sight is determined by the relative position of each of the holes.
A sighting device in which the distances of the holes from the surface of the main body along the radio wave irradiation direction of the radio wave sensor are different from each other in the mounted state. The sight according to claim 1 , wherein at least one of the distance between the holes and the distance from the main body of the holes can be changed in the mounted state. The sight according to claim 1 or 2 , wherein the sizes of the holes are different from each other. Wherein each hole has a shape in which a plurality of holes intersect, sight according to any one of claims 1 to 3. The main body can be attached to the support and can be attached to the support.
The aiming device according to any one of claims 1 to 4 , wherein the sighting device can be mounted on the opposite side of the mounting position of the support portion in the main body portion. With the main body
A radio wave sensor including a sighting device attached to the main body.
In the mounted state in which the sight is attached to the main body, the direction of the sight is different from the radio wave irradiation direction of the radio wave sensor.
A radio wave sensor in which the angle formed by the orientation of the aiming device and the radio wave irradiation direction in the mounted state is set based on the installation height of the radio wave sensor and the horizontal distance from the radio wave sensor to the reference point. It is a method of adjusting a radio wave sensor equipped with a sight.
The step of preparing the radio wave sensor and
Using the sighting device in which the direction of the sighting device is different from the radio wave irradiation direction of the radio wave sensor when the sighting device is attached to the main body of the radio wave sensor, the direction of the sighting device is used as a reference. and adjusting the orientation of the radio wave sensor to fit the point seen including,
The sighting device includes a plurality of plate-shaped members, and the sighting device has a plurality of plate-shaped members.
A hole is formed in each of the plate-shaped members, and the orientation of the sight is determined by the relative position of each of the holes.
In the mounted state, the distances of the holes from the surface of the main body along the radio wave irradiation direction of the radio wave sensor are different from each other.
An adjustment method in which, in a step of adjusting the direction of the radio wave sensor, the other hole is seen from one hole of the sighting device, and the orientation of the sighting device is adjusted to the reference point. The adjustment method according to claim 7 , wherein the reference point is located in an area including a boundary between the pedestrian crossing and the waiting area of the pedestrian crossing.

Images