JP2023176498A - Failure detection device - Google Patents

Abstract

To provide a failure detection device capable of detecting existences of failures in each monitoring device without workers directly visiting a large number of monitoring devices installed on a passage.SOLUTION: A failure detection device comprises a communication unit 120 that acquires position information from a failure determination mobile body 200 capable of acquiring own position information, and a failure determination unit 113 that determines whether there is a possibility of failure of the entire monitoring device 10 including a radar 20 based on the position information of the failure determination mobile body 200 detected by the radar 20 of the monitoring device 10 and position information of the failure determination mobile body 200 acquired by the failure determination mobile body 200.SELECTED DRAWING: Figure 1

Description

The present invention relates to a failure detection device for a monitoring device installed at a location where a plurality of moving objects intersect from different directions or a location with poor visibility.

Conventionally, reflective lights have been used in places where it is difficult to see directly from moving objects on the path, such as intersections with poor visibility on paths where moving objects such as vehicles and people move, and where there is a risk of collision between multiple moving objects. By installing mirrors, it is possible to confirm the presence or absence of moving objects located in locations that are difficult to see, and to prevent collisions between multiple moving objects.

In addition, in order to more accurately recognize moving objects located in areas on the path where direct visibility is difficult and to prevent collisions between multiple moving objects, we have installed a reflector in place of the conventionally installed reflector. A camera that captures images of areas that are difficult to see directly, a distance measurement unit that obtains distance information to moving objects, and a display unit that displays images captured by the camera and distance information obtained by the distance measurement unit. A traffic information notification device is known that includes (for example, see Patent Document 1).

JP2014-89490A

Traffic information notification devices will be installed at many locations on the route, such as intersections and corners with poor visibility. For this reason, maintenance work such as checking whether a traffic information notification device is malfunctioning requires the maintenance worker to deal with a large number of traffic information notification devices one by one, which takes up the time required for maintenance. and costs may increase.

An object of the present invention is to provide a failure detection device that can detect the presence or absence of a failure in a large number of monitoring devices installed on a passageway without requiring an operator to visit each of the monitoring devices directly. There is a particular thing.

The failure detection device according to the present invention includes a reflecting mirror used for checking the presence or absence of another moving object located in a passage along which a moving object moves, where it is difficult for one of the moving objects on the path to visually recognize the other moving object. a radar disposed nearby and capable of detecting information regarding the moving object moving in a predetermined range in the passage by transmitting a transmission wave and receiving a reflected wave from the moving object; A failure detection device that detects a failure of a monitoring device that performs a predetermined notification based on information regarding a plurality of the mobile bodies, and acquires position information from a failure determination mobile body that is capable of acquiring its own position information. an acquisition unit, the location information of the failure determination mobile body detected by the radar of the monitoring device, and the location information including the radar based on the position information of the failure determination mobile body acquired by the acquisition unit. and a failure determination unit that determines whether or not there is a possibility of failure of the entire monitoring device.

Further, the failure detection device according to the present invention includes a communication unit that sends and receives signals to and from the monitoring device, and when the failure determination unit is unable to send and receive signals to and from the monitoring device, It is determined that the communication unit is malfunctioning.

Further, in the failure detection device according to the present invention, the acquisition unit acquires information from the monitoring device that includes a shielding determination unit that determines whether a transmission wave transmitted from the radar is blocked by a shielding object. A signal related to determination that a transmitted wave is blocked by a shielding object is acquired.

According to the present invention, it is possible to detect whether or not there is a failure in a large number of monitoring devices installed on a passage without the worker having to go directly to each of the monitoring devices. It becomes possible to reduce the required time and cost.

1 is a schematic diagram of a failure detection system for a monitoring device according to an embodiment of the present invention. FIG. 2 is a perspective view showing a state in which a monitoring device is installed on a reflecting mirror according to an embodiment of the present invention. FIG. 1 is a perspective view of a monitoring device according to an embodiment of the present invention. FIG. 1 is a block diagram showing a control system of a failure detection system for a monitoring device according to an embodiment of the present invention. 3 is a flowchart showing the operation of a control unit of a management device according to an embodiment of the present invention.

1 to 5 show one embodiment of the present invention. FIG. 1 is a schematic diagram of the failure detection system of the present invention, FIG. 2 is a perspective view showing how a monitoring device is installed with respect to a reflecting mirror, FIG. 3 is a perspective view of the monitoring device, and FIG. 4 is a failure detection system of the present invention. FIG. 5 is a block diagram showing the control system of the management device, and FIG. 5 is a flowchart showing the operation of the control unit of the management device.

The failure detection system 1 of this embodiment is a monitoring device that monitors the risk of collision between a plurality of moving objects M, such as a collision between a vehicle M1 and a pedestrian M2, for example, a collision between a vehicle M1 and a pedestrian M2, which move on a road R that is a path with poor visibility. This is for detecting the presence or absence of a failure in No. 10.

The failure detection system 1 includes a monitoring device 10, a failure detection device (hereinafter referred to as a management device) 100 for determining whether or not there is a failure in the monitoring device 10, and a failure determination mobile object 200. The failure determination mobile body 200 is a vehicle that has a function of transmitting its own position information to the management device 100, which serves as a reference for determining whether or not the monitoring device 10 has a failure.

For example, as shown in FIG. 1, the monitoring device 10 is installed near an intersection J of a road R where a second road R2 is connected to a first road R1. The monitoring device 10 is used to confirm the presence or absence of a mobile object M located on the road R at a location where it is difficult to directly see the other road from one of the first road R1 and the second road R2. It is used together with the reflecting mirror 2.

The reflecting mirror 2 is called a road reflecting mirror or a curved mirror, and as shown in FIGS. 1 and 2, it is, for example, a circular convex mirror, and is located on the side of the first road R1 near the intersection J. It is attached to the upper end side of the support column 3 extending upward from the ground. The lower end side of the pillar 3 is supported by a concrete foundation 4, and by burying the foundation 4 underground, the pillar 3 is maintained in a posture extending upward from the ground.

As shown in FIG. 3, the monitoring device 10 includes a housing 11, a radar 20 for detecting information regarding the moving objects M, and a radar 20 for notifying the moving objects M around the intersection J of the risk of collision. Power is supplied to the danger alarm unit 30, the control unit 40 for controlling the operation of the danger alarm unit 30 based on the signal input from the radar 20, the radar 20, the danger alarm unit 30, and the control unit 40. A battery 50 for charging the battery 50 and a solar cell module 60 for charging the battery 50 with sunlight.

As shown in FIG. 3, the housing 11 is a box shaped like a rectangular parallelepiped, and is made of a resin member that can transmit electromagnetic waves transmitted from the radar 20 and reflected waves from the moving body M. Inside the housing 11, a radar 20, a danger alarm section 30, a control section 40, and a battery 50 are housed. The housing 11 is attached to a portion of the support 3 located below the reflecting mirror 2.

The radar 20 has a transmitting/receiving antenna that transmits and receives electromagnetic waves such as millimeter waves, for example, and the transmitting/receiving antenna transmits a transmitted wave and receives a reflected wave obtained by reflecting the transmitted wave from a target object. The radar 20 calculates the speed, distance, and angle of the target based on the reflected waves, and detects the position of the target within a predetermined detection range. The radar 20 identifies a moving object (point group) based on the detected target, performs clustering processing and tracking processing on this point group, and calculates the moving direction of the moving object M and the like.

In this embodiment, when the radar 20 is a two-dimensional radar, the speed of the moving body M, the distance from the radar 20 to the moving body M, and the horizontal direction of the moving body M are detected as information regarding the moving body M.

In this embodiment, when the radar 20 is a three-dimensional radar, the speed of the moving body M, the distance from the radar 20 to the moving body M, the horizontal direction of the moving body M, and the vertical direction of the moving body M are It is detected as information regarding body M.

The radar 20 detects, for example, a moving object M located within a range of 50 meters on one side and the other side from the intersection J on the first road R1, and within a range of 50 meters from the intersection J on the second road R2. do.

Here, the radar 20 can detect the moving object M within a horizontal range of 120 degrees, for example, and if the required horizontal detection range is 120 degrees or more, multiple radars can be used in combination. do.

As shown in FIG. 3, the danger alert unit 30 includes a light emitting unit 31 that visually alerts the moving objects M on the first road R1 and the second road R2 of the risk of collision, and a light emitting unit 31 that audibly alerts the moving objects M of the danger of collision. It has a speaker 32 that warns of danger.

The light emitting unit 31 is composed of a light emitting body such as an LED that can switch between red light emission and blue light emission. The light emitting section 31 includes a first light emitting section 31a, a second light emitting section 31b, and a third light emitting section 31c that extend along the left, right, and lower edges of the surface of the housing 11 facing the first road R1. are doing. The light emitting section 31 emits light as follows according to instructions from the control section 40. In FIG. 1, the first light emitting section 31a emits red light when the moving body M moving from left to right on the first road R1 approaches the intersection J, and emits blue light in other cases. In FIG. 1, the second light emitting section 31b emits red light when the moving body M moving from right to left on the first road R1 approaches the intersection J, and emits blue light in other cases. In FIG. 1, the third light emitting unit 31c emits red light when a moving object M moving in a direction of merging from the second road R2 to the first road R1 approaches an intersection J, and emits blue light in other cases. do.

The speaker 32 outputs a voice or a warning sound, and notifies the moving body M that is at risk of collision at the intersection J by sound.

The danger alarm unit 30 is not limited to the light emitting unit 31 and the speaker 32, and for example, a display unit such as a liquid crystal panel or an organic EL panel may be attached to the surface of the housing 11 to indicate the danger of collision. However, it may be attached directly to the support 3 of the reflecting mirror 2.

Further, the danger alarm section 30 does not need to be provided with the light emitting section 31 and the speaker 32 at the same time, and may be composed of at least one of the light emitting section 31, the speaker 32, and a display section that displays the risk of collision.

The control unit 40 includes a CPU, ROM, RAM, and the like. When the control unit 40 receives an input signal from a device connected to the input side, the CPU reads out a program stored in the ROM based on the input signal, and stores the state detected by the input signal in the RAM. , and send an output signal to a device connected to the output side. As shown in FIG. 4, the control section 40 has the radar 20 connected to its input side, and the light emitting section 31 and speaker 32 that constitute the danger alarm section 30 connected to its output side. Further, a communication unit 70 for transmitting and receiving signals to and from the management device 100 is connected to the control unit 40 .

The control unit 40 also includes a movement state acquisition unit 41 for acquiring the movement state of the mobile body M based on information regarding the mobile body M detected by the radar 20, and a movement state acquisition unit 41 for acquiring the movement state of the mobile body M based on information regarding the mobile body M detected by the radar 20. a danger determination unit 42 for determining whether there is a risk of collision between the plurality of moving bodies M based on the movement states of each of the plurality of moving bodies M detected and acquired by the movement state acquisition unit 41; and a radar 20. It has a shielding determination unit 43 that determines whether or not the transmission wave transmitted from the transmitter is blocked by a shielding object.

The moving state acquisition unit 41 acquires at least the position, moving direction, and moving speed of the moving body M based on information regarding the moving body M detected by the radar 20.

When the radar 20 is a two-dimensional radar, the moving state acquisition unit 41 acquires the position, moving direction, moving speed, and horizontal size of the detected moving body M based on information regarding the moving body M detected by the radar 20. Get the results.

Furthermore, when the radar 20 is a three-dimensional radar, the movement state acquisition unit 41 determines the position, movement direction, movement speed, and horizontal direction of the detected moving object M based on information regarding the moving object M detected by the radar 20. Obtain the size and vertical size of.

The risk determination unit 42 determines whether there is a risk of collision between the plurality of moving bodies M based on the movement states of each of the plurality of moving bodies M acquired by the movement state acquisition unit 41. For example, the danger determination unit 42 calculates the expected arrival time of each of the plurality of moving objects M to a predetermined position (installation location of the monitoring device 10), and based on the calculation result, the plurality of moving objects M reach the predetermined location within a predetermined time. When it is determined that the moving objects M have reached the position, it may be determined that there is a risk of collision between the plurality of moving objects M.

The shielding determination unit 43 is configured to detect reflected waves transmitted from the radar 20 based on reflected waves received by the radar 20 or reflected waves received by a dedicated sonar that detects a state in which the transmitted waves transmitted from the radar 20 are shielded. It is determined that the transmitted wave is blocked by an object such as a vehicle stopped on the side of the road R or a tree branch or leaf. For example, when the radar 20 or a dedicated sonar receives only reflected waves within a range of 5 m or less, the shielding determination unit 43 determines that the transmission wave transmitted from the radar 20 is blocked by a shielding object. judge.

The battery 50 is made of, for example, a lithium ion battery, and can be repeatedly charged and discharged.

The solar cell module 60 is, for example, configured by connecting a plurality of rectangular cells made of single crystal silicon in series, and as shown in FIGS. 1 and 2, the pillars of the reflecting mirror 2 It is attached to the upper end of 3. Solar cell module 60 is connected to battery 50 via a cable.

The monitoring device 10 having the above configuration uses the radar 20 to detect a moving object M moving within a predetermined range of the first road R1 and the second road R2 including the intersection J, and detects the moving object M moving within a predetermined range of the first road R1 and the second road R2 including the intersection J. When the movement state of M is acquired, the danger determination section 42 determines whether there is a risk of collision between the plurality of moving objects M, and if there is a risk of collision, the danger alarm section 30 determines whether or not there is a risk of collision with the moving objects M. to notify of danger.

The management device 100 is installed on the side of a road R, and performs wireless communication with an onboard device of a vehicle M1 as a moving body M moving within a management range of 1 km radius or a mobile terminal owned by a pedestrian M2, for example. The roadside device is capable of wireless communication with the monitoring device 10 located within the management range.

The management device 100 includes a control unit 110 for controlling operations related to failure determination of the monitoring device 10, and an acquisition unit for transmitting and receiving signals between each of the monitoring device 10 and the failure determination mobile object 200. It has a communication section 120.

The control unit 110 includes a radar detection information storage unit 111 that stores the position information of the failure determination mobile body 200 acquired from the monitoring device 10, and a radar detection information storage unit 111 that stores the position information of the failure determination mobile body 200 acquired from the failure determination mobile body 200. It has a positioning information storage section 112 for storing positioning information, and a failure determination section 113 for determining whether or not the monitoring device 10 is malfunctioning.

The radar detection information storage unit 111 stores position information of the mobile body M (failure determination mobile body 200) detected by the radar 20. The radar detection information storage unit 111 stores the position information of the moving body M from a coordinate system based on a predetermined point of the intersection J detected by the radar 20, expressed by latitude, longitude, and height, for example, an ITRF system. (International Earth Reference Coordinate System) and store it. The radar detection information storage unit 111 stores information regarding the date and time when the radar 20 detected the mobile body M (failure determination mobile body 200) as well as the position information of the mobile body M (failure determination mobile body 200). .

The positioning information storage unit 112 stores, for example, ITRF-based position information expressed by the latitude, longitude, and height of the failure determination mobile body 200 measured by a positioning device, which will be described later, that the failure determination mobile body 200 has. . The positioning information storage unit 112 stores information regarding the unique identification number of the failure determination mobile body 200 and the date and time when the traveling position of the failure determination mobile body 200 was measured, as well as the position information of the failure determination mobile body 200. has been done.

The failure determination unit 113 uses the position information of the mobile body M including the failure determination mobile body 200 stored in the radar detection information storage unit 111 and the position information of the failure determination mobile body 200 stored in the positioning information storage unit 112. Based on this, it is determined whether or not there is a failure in the radar 20.

The failure determination mobile object 200 includes a communication unit 210 for communicating with the management device 100, and a positioning device 220 for measuring the position of the own vehicle using, for example, a GNSS (Global Navigation Satellite System) function. ing. The positioning device 220 can measure the position of the failure determination mobile object 200 with an accuracy of less than 10 cm.

In the failure detection system 1 configured as described above, the control unit 110 of the management device 100 controls the mobile body M (failure determination mobile body 200) detected by the radar 20 of the monitoring device 10 located within the management range. The position information is acquired and stored in the radar detection information storage unit 111. Further, the control unit 110 acquires the position information of the failure determination mobile body 200 itself measured by the positioning device 220 of the failure determination mobile body 200 traveling within the management range, and stores it in the positioning information storage unit 112. The failure determination unit 113 determines whether there is a failure in the radar 20 based on the information stored in the radar detection information storage unit 111 and the information stored in the positioning information storage unit 112.

To explain in detail, first, the failure determination unit 113 uses the position information of the failure determination mobile body 200 stored in the positioning information storage unit 112 and the date and time when the failure determination mobile body 200 was detected, which is stored together with the position information. Based on this, the failure determination mobile body 200 is specified from the position information of the mobile body M stored in the radar detection information storage unit 111. Next, the failure determination unit 113 compares the position information of the failure determination mobile body 200 stored in the positioning information storage unit 112 and the position information of the mobile body M specified as the failure determination mobile body 200. , determines whether or not there is a failure in the radar 20. Here, if the position information of a plurality of mobile bodies M as the failure determination mobile body 200 is stored in the radar detection information storage unit 111, the radar 20 detects the failure determination mobile body 200 and other mobile bodies M. This means that it has been detected. Therefore, when the position information of a plurality of mobile bodies M as the failure determination mobile body 200 is stored in the radar detection information storage unit 111, the failure determination mobile body 200 is run again and the radar detection information is stored. The position information of the mobile body 200 for failure determination is stored in the unit 111, and the position information of the mobile body 200 for failure determination is stored in the positioning information storage unit 112.

The determination of the presence or absence of a failure in the radar 20 is performed between the position information of the mobile body 200 for failure determination stored in the positioning information storage unit 112 and the position information of the mobile body M specified as the mobile body 200 for failure determination. If there is a difference of more than a predetermined value (for example, 50 cm or more), it is determined that the radar 20 is malfunctioning.

In addition to cases where the radar 20 itself is out of order, cases where there is a difference in the respective position information include cases where the mounting state of the case 11 housing the radar 20 with respect to the support column 3 has changed, or the case where the case has changed. It is conceivable that the irradiation direction of the transmitted waves of the radar 20 may change due to bending of the support 3 to which the body 11 is attached.

The control unit 110 of the management device 100 performs failure detection processing to detect a failure of each of the radar 20 and the communication unit 70 of the monitoring device 10. The operation of the control unit 110 at this time will be explained using the flowchart of FIG.

(Step S1)
In step S1, the control unit 110 determines whether or not communication with the monitoring device 10 is possible, and if it is determined that communication with the monitoring device 10 is possible, the control unit 110 moves the process to step S2, and If it is not determined that communication is possible, the process moves to step S7.

Here, the case where it is not determined that communication with the monitoring device 10 is possible may be a case where the management device 100 is unable to acquire the position information of the mobile body M detected by the monitoring device 10 for a predetermined time or more. . In addition, the case where it is not determined that communication with the monitoring device 10 is possible means that the movement state acquisition unit 41 has been able to acquire information about the mobile object M, but due to a failure in the communication units 70 and 120, the There may also be cases where information cannot be received from the device 10 for a predetermined period of time or more.

(Step S2)
If it is determined in step S1 that communication with the monitoring device 10 is possible, or if it is determined in step S5 that a predetermined period of time has elapsed, the control unit 110 determines that communication with the monitoring device 10 is possible in step S2. The location information of the mobile body M (failure determination mobile body 200) acquired and converted into ITRF system is stored in the radar detection information storage unit 111, and is also measured by the positioning device 220 of the failure determination mobile body 200. The location information of the failure determination mobile body 200 thus determined is stored in the positioning information storage unit 112, and the process moves to step S3.

(Step S3)
In step S3, the control unit 110 stores the position information of the failure determination mobile body 200 stored in the radar detection information storage unit 111 and the position information of the failure determination mobile body 200 stored in the positioning information storage unit 112. The comparison is made to determine whether or not each location information has a difference of more than a predetermined value. If it is determined that each location information has a difference of more than a predetermined value, the process moves to step S4, and each location information has a difference of more than a predetermined value. If it is not determined that there is a difference greater than a predetermined value, the failure detection process is ended.

(Step S4)
If it is determined in step S3 that the respective position information has a difference greater than a predetermined value, in step S4 the control unit 110 causes the shielding determination unit 43 of the monitoring device 10 to block the transmission wave transmitted from the radar 20 by a shielding object. If a signal related to a determination result indicating whether or not a determination has been made is received from the monitoring device 10, and a determination result that the transmission wave transmitted from the radar 20 is blocked by a shielding object is received, step The process moves to step S5, and if the determination result that the transmission wave transmitted from the radar 20 is blocked by a shielding object is not received, the process moves to step S6.

(Step S5)
When receiving the determination result that the transmission wave transmitted from the radar 20 is blocked by a shielding object in step S4, the control unit 110 determines whether a predetermined time (for example, 10 minutes) has elapsed in step S5. If it is determined that the predetermined time has elapsed, the process moves to step S2, and if it is not determined that the predetermined time has elapsed, step S5 is repeated.

(Step S6)
If the determination result that the transmission wave transmitted from the radar 20 is blocked by a shielding object is not received in step S4, the control unit 110 transmits a signal regarding the failure of the radar 20 to the management device 100 in step S6. The failure detection process is terminated by sending a message to a notification means such as a display unit that notifies the user of the failure detection process.

(Step S7)
If it is not determined in step S1 that communication with the monitoring device 10 is possible, in step S8 the control unit 110 notifies the user of the management device 100 of a signal regarding the failure of the communication units 70 and 120. A message is sent to a notification means such as a display unit, and the failure detection process is completed.

As described above, the failure detection device of the present embodiment detects, on the road R on which the moving body M is moving, the location of another moving body M located at a location on the road R where it is difficult for one moving body M to visually recognize the other moving body M. A radar 20 is arranged near a reflecting mirror 2 used for the presence or absence of the vehicle, and is capable of detecting information regarding a moving object M moving within a predetermined range on a road R by transmitting a transmission wave and receiving a reflected wave from the moving object M. A failure detection device 100 that detects a failure of a monitoring device 10 that makes a predetermined notification based on information regarding a plurality of moving objects M detected by a radar 20, and is capable of acquiring its own position information. The communication unit 120 acquires the position information from the mobile body 200 for failure determination, the position information of the mobile body 200 for failure determination detected by the radar 20 of the monitoring device 10, and the mobile body 200 for failure determination acquired by the mobile body 200 for failure determination. It includes a failure determination unit 113 that determines whether or not there is a possibility of failure of the entire monitoring device 10 including the radar 20 based on the position information of the moving body 200.

As a result, it becomes possible to detect whether or not there is a failure in each monitoring device 10 without the worker directly visiting a large number of monitoring devices 10 installed on the road R, so maintenance of the monitoring device 10 can be carried out. This makes it possible to reduce the time and cost required for this.

The communication unit 120 also includes a communication unit 120 that transmits and receives signals to and from the monitoring device 10, and the failure determination unit 113 determines that the communication unit 120 is malfunctioning when it is impossible to transmit and receive signals to and from the monitoring device 10. , is preferable.

This makes it possible to detect whether or not there is a failure in the communication unit 120, so that it is possible to quickly respond to a failure in the communication unit 120, such as repair.

In addition, the communication unit 120 transmits information from the monitoring device 10 including a shielding determination unit 43 that determines whether or not the transmitting waves transmitted from the radar 20 are blocked by a shielding object. It is preferable to obtain a signal related to the determination that the object is blocked by the object.

As a result, when the transmission wave transmitted from the radar 20 is blocked by a temporarily stopped vehicle, the failure determination mobile object 200 detected by the radar 20 of the monitoring device 10 again after a predetermined period of time has elapsed. By acquiring the position information of the mobile body 200 for failure determination and the position information of the mobile body 200 for failure determination acquired by the mobile body 200 for failure determination, it becomes possible to detect whether or not there is a failure in the radar 20. It becomes possible to reduce the frequency of workers visiting the monitoring device 10 directly.

In the embodiment, the monitoring device 10 is configured to notify the danger of collision between moving bodies M on the road R, but the monitoring device 10 is not limited to this. The monitoring device of the present invention can also be applied, for example, to monitor the risk of collision between vehicles or between vehicles and pedestrians in a facility such as a factory where reflective mirrors are installed.

Further, in the embodiment described above, the monitoring device 10 is attached to the support 3 on which the reflecting mirror 2 is installed, but the present invention is not limited to this. In the monitoring device 10, the radar 20 only needs to be placed near the reflecting mirror 2, for example within a 2m range around the reflecting mirror 2, and may be attached to a dedicated support or mounted on another structure. May be attached.

Further, in the above embodiment, the failure determination mobile body 200 having the positioning device 220 is shown as the failure determination mobile body, but the present invention is not limited to this. A pedestrian may be used as a moving object for failure determination.

Furthermore, in the embodiment, the presence or absence of a failure of the radar 20 is determined based on the position information of the dedicated failure determination mobile body 200 that can acquire its own position information with high accuracy. However, it is not limited to this. If all moving objects moving on the road can obtain their own position information with high accuracy, radar detection can be performed using the position information of any moving object without using a dedicated failure determination moving object. It is possible to determine whether there is a failure or not.

1 Failure Detection System 2 Reflector 10 Monitoring Device 20 Radar 43 Shielding Judgment Unit 70 Communication Unit 100 Management Device 113 Failure Judgment Unit 200 Mobile Object for Failure Judgment 220 Positioning Device J Intersection M Mobile Object R Road

Claims (3)

A transmitting wave is disposed near a reflecting mirror used for confirming the presence or absence of another moving object located at a location on the path where the moving object is difficult to see from one of the moving objects on the path, and transmits a transmission wave. and a radar capable of detecting information about the moving objects moving in a predetermined range in the passage by receiving reflected waves from the moving objects, and based on information about the plurality of moving objects detected by the radar. A failure detection device that detects a failure of a monitoring device that performs a predetermined notification,
an acquisition unit that acquires position information from a failure determination mobile body that can acquire its own position information;
of the entire monitoring device including the radar based on the position information of the failure determination mobile body detected by the radar of the monitoring device and the position information of the failure determination mobile body acquired by the acquisition unit. A failure detection device comprising: a failure determination unit that determines whether there is a possibility of failure. comprising a communication unit that transmits and receives signals to and from the monitoring device,
The failure detection device according to claim 1, wherein the failure determination unit determines that the communication unit has failed when it is impossible to send and receive signals to and from the monitoring device. The acquisition unit is configured to detect whether the transmission waves transmitted from the radar are blocked by a shielding object from the monitoring device, which includes a shielding determination unit that determines whether the transmission waves transmitted from the radar are blocked by a shielding object. The failure detection device according to claim 1 or 2, wherein the failure detection device acquires a signal related to a determination that the failure detection device has failed.

Images