Abnormality diagnosis device and abnormality diagnosis system

Abstract

To provide an abnormality diagnosis device and an abnormality diagnosis system that perform abnormality diagnosis by utilizing, as acoustic information for abnormality diagnosis, sound emitted from an instrument provided in a stationary moving body.SOLUTION: An abnormality diagnosis device for diagnosing an abnormality of at least one of an instrument and a wheel provided in a vehicle includes: a sound collection device that acquires an acoustic signal; an acoustic signal processing part that processes the acoustic signal output from the sound collection device; an abnormality determination part that determines an abnormality of at least one of the instrument and the wheel on the basis of a processing result in the acoustic signal processing part; and a sound collection control part that controls the sound collection device on the basis of information relating to the vehicle. The sound collection device is installed in a space provided above or below a platform.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an abnormality diagnostic device and an abnormality diagnostic system for diagnosing abnormalities in equipment and the like. [Background technology]

[0002] Mobile objects, such as railway vehicles, are equipped with many pieces of equipment. If an abnormality occurs in these pieces of equipment, the mobile object may lose its functionality. When an abnormality occurs in such equipment, it may emit a sound that is different from that emitted during normal operation. Therefore, a sound collection device is installed to collect this sound, and an abnormality diagnosis of the target equipment is performed based on the acoustic information obtained from the sound collection device. For example, Patent Document 1 describes a "non-contact vehicle abnormality detection device." Furthermore, Patent Document 2 describes an "abnormality diagnosis device using acoustic intensity." [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 6-82344 [Patent Document 2] Japanese Patent Application Laid-Open No. 2000-205942 Summary of the Invention [Problem to be solved by the invention]

[0004] In the technologies described in Patent Documents 1 and 2, a stationary sound collecting device collects sounds emitted from equipment attached to a moving object traveling at a certain speed, and the collected sounds are used as acoustic information for abnormality diagnosis. However, the sounds collected by the stationary sound collecting device are short-duration sounds that can be collected when the moving object passes around the sound collecting device. In order to perform abnormality diagnosis with higher accuracy, it is important to collect acoustic information over a long period of time or to collect sounds emitted from the equipment to be diagnosed in a concentrated manner, but such technologies are not described in Patent Documents 1 and 2.

[0005] Therefore, an object of the present invention is to provide an abnormality diagnosis device and an abnormality diagnosis system that can perform abnormality diagnosis by utilizing sounds emitted from equipment installed on a stationary mobile object as acoustic information for abnormality diagnosis. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems, one representative abnormality diagnosis device according to the present invention is an abnormality diagnosis device for diagnosing abnormalities in at least one of a device and a wheel provided on a vehicle, the abnormality diagnosis device comprising: a sound pickup device for acquiring an acoustic signal; an acoustic signal processing unit that processes an acoustic signal output from the sound collection device; an abnormality determination unit that determines an abnormality in at least one of the equipment and the wheels based on the processing result in the acoustic signal processing unit; a sound collection control unit that controls the sound collection device based on information about the vehicle, This is achieved by installing the sound collection device in a space provided above or below the platform. [Effects of the Invention]

[0007] According to the present invention, it is possible to provide an abnormality diagnosis device and an abnormality diagnosis system that can perform abnormality diagnosis by utilizing sounds emitted from equipment provided on a stationary mobile object as acoustic information for abnormality diagnosis. Problems, configurations, and effects other than those described above will become apparent from the following description of the embodiments. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a schematic diagram of the inside of a railway station where a railway vehicle and a platform according to a first embodiment of the present invention are parked. [Figure 2] FIG. 2 is a block diagram showing an abnormality diagnosis device and an abnormality diagnosis system according to the first embodiment of the present invention. [Figure 3] FIG. 3 is a schematic diagram showing the time when a railcar enters a platform, stops, and departs. [Figure 4]FIG. 4 is a plan view showing the relative positions of the railway vehicle and the sound collection device at a certain time, including the space below the platform. [Figure 5] FIG. 5 is a plan view of a railway station premises where a stationary railway vehicle and a platform are present, including the space below the platform, according to the second embodiment of the present invention. [Figure 6] FIG. 6 is a diagram showing the configuration of a railway station premises where a railway vehicle and a platform according to the third embodiment of the present invention are present. [Figure 7] FIG. 7 is a plan view including the space above the platform within a railway station where a stationary railway vehicle and a platform are present according to the third embodiment of the present invention. [Figure 8] FIG. 8 shows the inside of a railway station where a railway vehicle and a platform according to the fourth embodiment of the present invention are present. [Figure 9] FIG. 9 is a block diagram showing an abnormality diagnosis device and an abnormality diagnosis system according to a fourth embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0009] (Embodiment 1) 1 is a schematic diagram of a platform 1 according to embodiment 1 and a railway station premises 100 where a railway vehicle 10 stops. Hereinafter, the vehicle width direction is defined as the x direction, the vehicle longitudinal direction is defined as the y direction, and the vehicle height direction is defined as the z direction.

[0010] Within a railway station premises 100, a space 101 where passengers board and disembark railway vehicles 10 or where cargo is loaded and unloaded is comprised of a platform 1, a roof 3, etc. Railway vehicles 10 run on tracks 11 installed on track surface 12. Railway vehicles 10 are also comprised of bogies 14 including wheels 13, equipment 15 provided below the railway vehicle, equipment 16 provided above the railway vehicle 10, etc. A single railway vehicle 10 may be provided with a plurality of bogies 14 and equipment 15, 16. Railway vehicles 10 are also provided with a vehicle information output device 20 that outputs vehicle information, running position, running speed, etc. of railway vehicle 10 itself to a control room (not shown), an inspection and repair shed (not shown), etc.

[0011] When passengers (not shown) using the railway vehicle 10 get on and off, or when loading and unloading cargo, the upper surface of the platform 1 is used to open and close doors (not shown) provided on the stationary railway vehicle 10 to board and alight, or to load and unload cargo onto and from the railway vehicle 10. A space 102 is provided below the platform 1. This space 102 is used as a space for temporary refuge in the event that a passenger (not shown) falls from the platform 1 onto the track 11 to avoid contact with the railway vehicle 10 entering the railway station premises 100. A sound collection device 21 is provided in this space 102. At least one sound collection device 21 is installed along the traveling direction of the railway vehicle 10 (the direction perpendicular to the plane of the paper in FIG. 1, the y direction).

[0012] Fig. 2 is a block diagram showing an abnormality diagnosis system according to an embodiment of the present invention. The abnormality diagnosis system comprises a vehicle information output device 20 provided on a railway vehicle 10 and an abnormality diagnosis device provided outside the railway vehicle 10, and the abnormality diagnosis device has a sound collection device 21, a vehicle information processing unit 22, a sound collection control unit 23, an acoustic signal processing unit 24, a vehicle information recording unit 25, an abnormality diagnosis unit 26, and an alarm unit 27. Details of each device shown in Fig. 2 will be described below.

[0013] [Vehicle information output device] The vehicle information output device 20 is a device that outputs information about the railway vehicle 10 to the outside. The vehicle information output device 20 is provided inside the railway vehicle 10, for example, in the driver's cab of the lead car or in underfloor equipment. The information about the railway vehicle 10 that is output from the vehicle information output device 20 includes the train formation number (vehicle identification information that can specify the wheel positions), the positions and types of the onboard equipment 15, 16, running position, running speed, start time of entering platform 1, stationary time, departure time, etc. The external destinations to which the vehicle information output device 20 outputs include an abnormality diagnosis device, a train operation control center (not shown), an inspection and repair depot (not shown), etc., and information is output one by one. The output method from the vehicle information output device 20 is generally wireless. The information output from the vehicle information output device 20 is received by a vehicle information processing unit 22, which will be described later.

[0014] [Vehicle Information Processing Unit] The vehicle information processing unit 22 is a device that receives and processes various information (information about the vehicle) output from the vehicle information output device 20. The various information processed by the vehicle information processing unit 22 is displayed in the operation control center (not shown) on a screen (not shown) or the like for monitoring the position, running speed, approach start time to platform 1, stationary time, departure time, etc. of the railway vehicle 10 at the time when the information from the vehicle information output device 20 is received and processed. In addition, the various information processed by the vehicle information processing unit 22 is transmitted to a sound collection control unit 23, an acoustic signal processing unit 24, a vehicle information recording unit 25, and an abnormality diagnosing unit 26 of the abnormality diagnosing device.

[0015] [Sound pickup control section] The sound collection control unit 23 is a device that controls the operation of the sound collection device 21 (described later) that operates to acquire sounds from the railway vehicle 10 based on various information received from the vehicle information processing unit 22, and controls the sound collection start time, sound collection end time, etc. (these are referred to as sound collection timing). For example, based on information acquired from the vehicle information output device 20, the sound collection control unit 23 can operate the sound collection device 21 to output an acoustic signal when the devices 15, 16 mounted on the railway vehicle 10 and the sound collection device 21 have a predetermined positional relationship. If there are multiple sound collection devices 21, the sound collection control unit 23 can select and operate the sound collection device 21 that has achieved the predetermined positional relationship.

[0016] [Sound recording device] The sound collection device 21 operates to acquire sounds from the railway vehicle 10, and is installed in a position closest to the positions of the equipment 15, 16, wheels 13, etc. provided on the railway vehicle 10 that has entered the platform 1 and is stationary at a predetermined stationary position, among the various information received from the vehicle information processing unit 22. When there are multiple sound collection devices 21, the sound collection control unit 23 may operate only the sound collection device 21 that is closest to the positions of the equipment 15, 16, wheels 13, etc., based on the stationary position of the vehicle determined based on the various information received from the vehicle information processing unit 22.

[0017] The sound collection start time and sound collection end time will be explained using the diagram. Figure 3 is a schematic diagram showing the time when railway vehicle 10 approaches platform 1, stops, and departs. If the time when railway vehicle 10 stops at platform 1 is T, and the time (approach time) from when it approaches platform 1 from a position a certain distance away from its stationary position on platform 1 (time has gone back on the time axis) until it stops is ΔT1, then the time when it starts approaching platform 1 from a position a certain distance away from platform 1 (time has gone back on the time axis) (approach start time) is T - ΔT1. Furthermore, if the time when railway vehicle 10 stops at platform 1 is ΔT, the departure time from platform 1 is T + ΔT. Furthermore, if the time (departure time) from when the train departs from its stationary position on platform 1 and travels a certain distance (time progresses on the time axis) is ΔT2, then the time (departure end time) from when the train departs from its stationary position on platform 1 and travels a certain distance (time progresses on the time axis) is (T+ΔT)+ΔT2.

[0018] FIG. 4 is a plan view showing the positional relationship between the sound collection device 21 and the railway vehicle 10 at a certain time t, including the space 102 below the platform 1. The position of the sound collection device 21 shown in FIG. 4 is within the space 102 below the platform 1, and is a position near the equipment 15 when the railway vehicle 10 is stationary on the platform 1. FIG. 4(a) shows the positional relationship between the sound collection device 21 and the railway vehicle 10 at a certain time t between the approach start time T-ΔT1 and the stationary time T, FIG. 4(b) shows the positional relationship between the sound collection device 21 and the railway vehicle 10 at a certain time t between the stationary time T and the departure time T+ΔT, and FIG. 4(c) shows the positional relationship between the sound collection device 21 and the railway vehicle 10 at a certain time t between the departure time T+ΔT and the departure end time (T+ΔT)+ΔT2. The sound collection start time p of the sound collection device 21 is a time between the time the railcar 10 enters the platform 1, comes to a stop, and then comes to a stop (T-ΔT1≦p≦T+ΔT), and is the time when the state is either of FIG. 4(a) or FIG. 4(b). The sound collection end time q of the sound collection device 21 is a time between the time the railcar 10 comes to a stop on the platform 1 and the departure end time (T≦q≦(T+ΔT)+ΔT2), and is the time when the state is either of FIG. 4(b) or FIG. 4(c). The sound collection control unit 23 controls the operation of the sound collection device 21 in accordance with these times.

[0019] The sound collection device 21 is a device that captures sounds from the railway vehicle 10. The sounds of the railway vehicle 10 that are captured include the equipment 15, 16 provided below and above the railway vehicle 10 as it approaches the platform, stops, and departs, as well as the wheels 13. A microphone is used to capture these sounds. This microphone can be an omnidirectional microphone that captures sounds from any direction with the same sensitivity, or a unidirectional microphone that captures sounds from a specific direction with high sensitivity. A microphone array made up of multiple microphones can also be used. The use of a microphone array can be useful as a unidirectional microphone that increases sensitivity to a specific direction through signal processing, or for identifying the direction of high sound pressure levels among sounds around the microphone array.

[0020] The sound collection device 21 is installed in a space 102 provided below the platform 1 along the running direction (track 11) of the railway vehicle 10. The position of the sound collection device 21 is near the equipment 15, 16 and wheels 13 provided on the railway vehicle 10 stationary on the platform 1, and varies depending on the make-up, model, etc. of the railway vehicle 10. One or more sound collection devices 21 are installed per railway vehicle 10.

[0021] The operation control of the sound collection device 21 that acquires the sound, the sound collection start time, and the sound collection end time are determined by the sound collection control unit 23, and sound collection is performed. In addition, the sound of the railway vehicle 10 acquired by the sound collection device 21 is transmitted to the acoustic signal processing unit 24, which will be described later.

[0022] [Acoustic signal processing section] The acoustic signal processing unit 24 receives the sound transmitted from the sound collection device 21 and various information related to the railway vehicle 10 transmitted from the vehicle information processing unit 22, and performs processing to link the sound transmitted from the sound collection device 21 with equipment, wheels, etc., in the vicinity of the sound collection device 21 that acquired the sound. The information processed by the acoustic signal processing unit 24 is recorded on a separately provided information recording medium (for example, a hard disk drive, not shown).

[0023] [Vehicle Information Recording Unit] The vehicle information recording unit 25 searches for and extracts acoustic information recorded on a separately provided information recording medium (e.g., a hard disk drive, not shown) from the information received from the vehicle information processing unit 22, for acoustic information emitted by the equipment 15, 16, wheels 13, etc. provided on the railway vehicle 10 when they are operating normally. The acoustic information recorded on the information recording medium (not shown) refers to the sounds emitted by the equipment, wheels, etc. provided on the railway vehicle 10 during normal operation, and these sounds have been separately measured. Here, normal operating sounds refer to the sounds emitted when the equipment, wheels, etc. provided on the railway vehicle 10 are operating normally (within a range that does not interfere with normal operation, without problems) under the usage conditions of normal operation. If the sounds emitted by the equipment, wheels, etc. provided on the railway vehicle 10 are not normal operating sounds, there is a possibility that an abnormality exists in the equipment or that a flat (a scratch caused by scraping the wheel tread) has occurred on a wheel. The acoustic information extracted by the vehicle information recording unit is sent to an abnormality determination unit, which will be described later.

[0024] [Abnormality diagnosis section] The abnormality diagnosing unit 26 diagnoses whether the acoustic information received from the acoustic signal processing unit 24 is a normal sound based on the acoustic information received from the vehicle information recording unit 25. This diagnosis is performed by determining a correlation or the like to determine how close the characteristic frequencies and sound pressure levels, etc., contained in the acoustic information received from the acoustic signal processing unit 24 are to the characteristic frequencies and sound pressure levels, etc., contained in the acoustic information (normal sound) received from the vehicle information recording unit 25. The abnormality diagnosing unit 26 diagnoses whether the sound acquired by the sound collection device 21 is normal, and if it is normal, the process ends. If it is diagnosed as abnormal (abnormal), various information related to the diagnosis result (abnormal diagnosis result) is transmitted to the notification unit 27, which will be described later. The abnormality diagnosing unit 26 determines whether the sound to be diagnosed is abnormal based on, for example, whether the correlation coefficient is higher than a separately set numerical value. The various information here includes the train formation number of the railway vehicle 10 from which the sound determined to be abnormal (abnormal) was acquired, the location and type of equipment, the location and type of wheels, the location of the sound collection device, the date and time of sound collection, etc.

[0025] [Notification Department] The notification unit 27 notifies the various information received from the abnormality diagnosis unit 26 to the outside. Here, the outside refers to a train operation control center (not shown), an inspection and repair depot (not shown), etc. The notification means may be an auditory notification by a speaker (not shown) provided in the train operation control center (not shown), the inspection and repair depot, etc., or a visual notification by a screen (not shown). The train operation control center, the inspection and repair depot, etc. that have received the notification from the notification unit manage the operation of the train 10 and arrange for an inspector / repair technician to inspect and repair the train 10 that has been determined to be abnormal (abnormal).

[0026] The flow of abnormality diagnosis according to this embodiment will be explained below with reference to Fig. 2. A railway vehicle 10 equipped with a vehicle information output device 20 travels while outputting, as appropriate, from the vehicle information output device 20 to a train control center (not shown), an inspection and repair depot (not shown), or the like, the train formation number of the railway vehicle 10, the location and type of equipment, the running position, the running speed, the start time of approaching platform 1, the stop time at platform 1, the departure time from platform 1, and the like. As the railway vehicle 10 approaches railway station premises 100 where it is scheduled to stop, and around the time when it starts approaching platform 1 or at the time when it reaches that time, the sound collection control unit 23 determines the operation control, sound collection start time, and sound collection end time (or sound collection duration) of the sound collection device 21 that acquires sounds from the railway vehicle 10, and outputs signals instructing the sound collection device 21 to do so.

[0027] The sound collection device 21 that captures the sound of the railway vehicle 10 is determined from the positions of the equipment 15, 16, wheels 13, etc. of the railway vehicle 10 scheduled to stop on the platform 1, processed by the vehicle information processing unit 22. In other words, the sound collection device 21 to be operated is not necessarily all the sound collection devices 21 installed in the space 102 below the platform 1 that are operating for sound collection, but is the sound collection device installed in a position closest to the positions of the equipment 15, 16, wheels 13, etc. of the railway vehicle 10 that is the target of abnormality diagnosis for the railway vehicle 10 scheduled to stop on the platform 1. When the sound collection start time arrives, the sound collection device 21 to be operated starts collecting sound. When the sound collection end time arrives (or the sound collection time has elapsed), the sound collection device 21 stops collecting sound. The acquired acoustic information is transmitted to the acoustic signal processing unit 24.

[0028] The acoustic signal processing unit 24 receives the acoustic information from the sound collection device 21, receives the acoustic information transmitted from the sound collection device 21, and various information related to the railway vehicle 10 transmitted from the vehicle information processing unit 22, and performs processing to link the acoustic information acquired by a certain sound collection device 21 with equipment, wheels, etc. present in the vicinity of that sound collection device. In other words, it acquires information on which railway vehicle, which equipment (or wheel, etc.), at what time, and what acoustic signal was collected.

[0029] The acquired information is transmitted to the abnormality diagnosing unit 26. The abnormality diagnosing unit 26 diagnoses whether the sound is normal or not based on the acoustic information transmitted from the acoustic signal processing unit 24. This diagnosis is made by comparing the acoustic information acquired from the acoustic signal processing unit 24 with acoustic information acquired from the vehicle information recording unit 25 when the equipment, wheels, etc. are normal. If the abnormality diagnosing unit 26 diagnoses that the acoustic information acquired from the acoustic signal processing unit 24 is normal according to predetermined criteria, the flow of abnormality diagnosis ends. On the other hand, if the abnormality diagnosing unit 26 diagnoses that the acoustic information acquired from the acoustic signal processing unit 24 is abnormal (abnormal) according to predetermined criteria, it transmits to the alarm unit 27 information related to the train formation number of the railway vehicle 10 from which the diagnosed acoustic information was acquired, the location and type of the equipment, the location of the sound collection device, the date and time of sound collection, etc.

[0030] The notification unit 27 receives various information that has been determined to be abnormal (abnormal) by the abnormality diagnosis unit 26 and notifies the various information received from the abnormality diagnosis unit 26 by audio notification using a speaker (not shown) provided in an operation control center (not shown) or an inspection and repair depot (not shown), or by visual notification using a screen (not shown).

[0031] As described above, the diagnostic system of this embodiment can determine whether there is an abnormality in the equipment, wheels, etc., provided on a railway vehicle stationary on a platform.

[0032] (Embodiment 2) The second embodiment differs from the first embodiment in that there are a plurality of pieces of equipment, wheels, etc. of the railway vehicle 10 that are the subject of sound collection. Other points are the same as those of the first embodiment. Therefore, only the parts that differ from the first embodiment will be described, and a description of the overlapping parts will be omitted.

[0033] Fig. 5 is a plan view of a railway station premises 100 in which a stationary railway vehicle 10 and a platform 1 according to the second embodiment are present, including a space 102 below the platform 1. As shown in Fig. 5, wheels 13a and 13e and equipment 15b and 15d are provided below the railway vehicle 10. Five sound collection devices 21a, 21b, 21c, 21d, and 21e are installed in the space 102 below the platform 1 along the direction of travel of the railway vehicle 10 (the direction of the track 11). Of the five sound collection devices 21a, 21b, 21c, 21d, and 21e, four of the sound collection devices 21a, 21b, 21d, and 21e are installed in positions close to the wheels and the equipment, respectively. The combinations are the closest combinations, namely (wheel 13a, sound collection device 21a), (device 15b, sound collection device 21b), (device 15d, sound collection device 21d), (wheel 13e, sound collection device 21e). The remaining sound collection device 21c is installed between sound collection devices 21b and 21d.

[0034] A railway vehicle 10 that approaches, stops at, or departs from platform 1 transmits various pieces of information such as the train formation number of the railway vehicle 10, the location and type of equipment, the stationary position, running speed, the time the vehicle starts approaching the platform, the time the vehicle stops at the platform, and the time the vehicle departs from the platform, via a vehicle information output device 20 to a vehicle information processing unit 22 as appropriate. The sound collection device that acquires the sound of the railway vehicle 10 is a sound collection device installed in a position close to the equipment, wheels, etc. provided on the railway vehicle 10, and receives this information along with the sound collection start time and sound collection end time via a sound collection control unit 23, and collects the sound.

[0035] 5, four sound collection devices 21a, 21b, 21d, and 21e are selected by sound collection control unit 23 to operate and capture sounds. Sound collection device 21c is not selected and does not operate. The sounds captured by these four sound collection devices 21a, 21b, 21d, and 21e are transmitted to abnormality diagnosis unit 26 via acoustic signal processing unit 24. The abnormality diagnosis unit 26 determines whether the equipment, wheels, etc., that are the target of capture by each sound collection device are normal or not, based on the sounds of the equipment, wheels, etc.

[0036] As described above, it is not necessary to operate and collect sound from all of the sound collection devices installed in the space 102 below the platform 1. By limiting the collection of sound to the equipment, wheels, etc. that are being diagnosed for abnormalities and collecting only the truly necessary sounds, it is possible to reduce the processing load on the acoustic signal processing unit, etc. that processes the sounds collected by the sound collection devices.

[0037] As described above, according to this embodiment, it is possible to select only the most suitable sound collection device from among a plurality of devices, wheels, etc. provided under the railway vehicle 10 when stationary, and determine whether an abnormality has occurred.

[0038] (Embodiment 3) In the third embodiment, the installation position of the sound collection device is different from that of the first embodiment. Other points are the same as those of the first embodiment. Therefore, only the points that are different from the first embodiment will be described, and a description of the overlapping points will be omitted.

[0039] 6 is a schematic diagram of a railway station premises 100 where a platform 1 and a railway vehicle 10 according to embodiment 3 are present. As shown in FIG. 6, a sound collection device 31 is installed in a space 101 above the platform 1.

[0040] Fig. 7 is a plan view of a railway station premises 100 in which a stationary railway vehicle 10 and a platform 1 according to embodiment 3 are present, including a space 101 above the platform 1. As shown in Fig. 7, equipment 16 is provided above the railway vehicle 10.

[0041] A railway vehicle 10 that approaches, stops at, or departs from platform 1 transmits various pieces of information, such as the train formation number of the railway vehicle 10, the location and type of equipment, running position, running speed, the time the vehicle begins approaching platform 1, the time the vehicle stops at platform 1, and the time the vehicle departs from platform 1, to a vehicle information processing unit 22 as appropriate via a vehicle information output device 20. A sound collection device 31 that captures the sound of the railway vehicle 10 is installed in a position close to the equipment 16 provided on the railway vehicle 10, and receives and collects the information along with the sound collection start time and sound collection end time via a sound collection control unit 23. Therefore, in FIG. 7 , sound is acquired by the sound collection device 31. The sound acquired by the sound collection device 31 is transmitted to an abnormality diagnosis unit 26 via an acoustic signal processing unit 24. The abnormality diagnosis unit 26 determines whether or not the equipment 16 is normal based on the sound of the equipment 16 that is the target of acquisition by each sound collection device.

[0042] As described above, according to this embodiment, it is possible to determine whether there is an abnormality in equipment etc. provided above the stationary railway vehicle 10.

[0043] (Embodiment 4) The fourth embodiment differs from the first embodiment in that it includes an imaging device 41 in the space 101 above the platform 1, an imaging control unit 42 that controls the imaging device 41, and an image signal processing unit 43 that processes image signals acquired by the imaging device 41. The rest is the same as the first embodiment. Therefore, only the parts that differ from the first embodiment will be described, and a description of the overlapping parts will be omitted.

[0044] Fig. 8 shows a railway station premises 100 where a platform 1 and a railway vehicle 10 according to the fourth embodiment are present. As shown in Fig. 8, a photographing device 41 is installed in a space 101 above the platform 1. At least one photographing device 41 is installed along the traveling direction of the railway vehicle 10 (the direction perpendicular to the paper surface, or the y direction, in Fig. 8).

[0045] Fig. 9 is a block diagram showing an abnormality diagnosis device and its system according to embodiment 4. Details of the devices and the like shown in Fig. 9 that differ from embodiment 1 will be described below.

[0046] [Photographing equipment] The photographing device 41 is a device that acquires images of the railway vehicle 10. The images of the railway vehicle 10 that are acquired are images of the body of the railway vehicle 10 as it enters the platform 1, stops, and departs, as well as images of equipment provided on the railway vehicle 10. A camera is used as a device for acquiring these images. This camera may be a camera that can capture images limited to a certain angle of view, or a camera that can capture images in all directions (360-degree camera), etc.

[0047] The photographing device 41 is installed in a space 101 provided above the platform 1. The photographing device 41 is used to identify the type of railway vehicle 10, etc. Therefore, the installation position of the photographing device 41 is desirably a position where it can photograph the characteristics of the railway vehicle 10 stopped on the platform 1 (for example, the leading car or the last car). The stationary positions of the railway vehicles 10 stopped on the platform 1 differ depending on the formation and type of vehicle. Therefore, the installation position of the photographing device 41 is a position where it can photograph any railway vehicle stopped on the platform, or a position where it can photograph a specific railway vehicle 10, and the number of installation points is at least one.

[0048] The photographing device 41 that captures the image and the photographing time (photographing timing) are determined by a photographing control unit 42, which will be described later. The image of the railway vehicle 10 captured by the photographing device 41 constitutes information about the vehicle, and is transmitted to an image signal processing unit 43, which will be described later.

[0049] [Vehicle Information Processing Unit] The vehicle information processing unit 22 performs the processing described in the first embodiment and also processes information from the image signal processing unit 43. In the fourth embodiment, the information processed by the vehicle information processing unit 22 is transmitted to the sound collection control unit 23, the acoustic signal processing unit 24, and the vehicle information storage unit 25, as well as to the photography control unit 42 and the image signal processing unit 43, which will be described later.

[0050] [Shooting control unit] The photographing control unit 42 controls the operation of the photographing device 41 that captures images of the railway vehicle 10 and the photographing time (photographing timing) based on various information received from the vehicle information processing unit 22.

[0051] The photographing time for acquiring an image of the railway vehicle 10 is determined based on the scheduled time when the railway vehicle 10 will enter and stop on the platform 1, among the various pieces of information received from the vehicle information processing unit 22, and the entering railway vehicle 10 can be photographed at the appropriate timing accordingly.

[0052] [Image signal processing section] The image signal processing unit 43 receives images of the railway vehicle 10 transmitted from the photographing device 41 and various information related to the railway vehicle 10 transmitted from the vehicle information processing unit 22, and performs processing to identify the railway vehicle 10 entering, stopping, and departing from the platform 1 from the images of the railway vehicle 10 acquired by the photographing device 41. Identification of the railway vehicle 10 is also performed by the vehicle information processing unit 22 based on information from the vehicle information output device 20, but the image signal processing unit 43 confirms whether the identification result of the railway vehicle 10 transmitted from the vehicle information processing unit 22 matches, and functions as a complement when the vehicle information processing unit 22 is unable to identify the railway vehicle 10 due to poor communication from the vehicle information output device 20, etc. The various information received by the image signal processing unit 43 is recorded on a separately provided information recording medium (for example, a hard disk drive, not shown).

[0053] Based on the train formation number of the railway vehicle 10 identified by the vehicle information processing unit 22 and the image signal processing unit 43, the position and type of equipment, running position, running speed, start time of approaching the platform 1, stationary time, departure time, etc., the sound collection device 21 acquires sounds via the sound collection control unit 23, and acquires sounds emitted from the equipment, wheels, etc. provided on the railway vehicle 10, and diagnoses whether they are normal or not by the abnormality diagnosis unit 26. Furthermore, when there are multiple sound collection devices 21, the sound collection control unit 23 may operate only the sound collection device 21 closest to the position of the equipment 15, 16, wheels 13, etc., based on the stationary position of the vehicle determined based on the image captured by the photographing device 41.

[0054] As described above, by identifying railway vehicles 10 through two processing systems, the vehicle information processing unit 22 and the image signal processing unit 43, the reliability of control by the sound collection device 21 that acquires sound and the sound collection control unit 23 that controls the sound collection time, etc. is improved, and in cases where identification cannot be performed through the processing of the vehicle information processing unit 22, information such as the type of railway vehicle 10 can be supplemented by the imaging device 41 and the image signal processing unit 43 (identifying railway vehicles 10 from captured images only), making it possible to more accurately determine abnormalities in railway vehicle equipment, wheels, etc.

[0055] As described above, according to this embodiment, it is possible to provide an abnormality diagnosis device and an abnormality diagnosis system that are capable of diagnosing abnormalities in devices provided in a stationary vehicle with higher accuracy.

[0056] The present invention is not limited to the above-described embodiment, but includes various modifications. For example, the above-described embodiment has been described in detail to clearly explain the present invention, and the present invention is not necessarily limited to an embodiment having all of the described configurations. For example, the present invention is applicable to all moving bodies, not just vehicles.

[0057] This specification includes the disclosure of the following inventions. (First aspect) An abnormality diagnosis device for diagnosing abnormalities in at least one of a device and a wheel provided on a vehicle, a sound pickup device for acquiring an acoustic signal; an acoustic signal processing unit that processes an acoustic signal output from the sound collection device; an abnormality determination unit that determines an abnormality in at least one of the equipment and the wheels based on the processing result in the acoustic signal processing unit; a sound collection control unit that controls the sound collection device based on information about the vehicle, The sound collection device is installed in a space provided above or below the platform; An abnormality diagnosis device characterized by the above.

[0058] (Second aspect) In the abnormality diagnosis device of the first aspect, The sound collection device is installed near at least one of equipment and wheels of a vehicle stationary near a platform; An abnormality diagnosis device characterized by the above.

[0059] (Third aspect) In the abnormality diagnosis device of the first aspect or the second aspect, The sound collection device is a directional sound collection device; An abnormality diagnosis device characterized by the above.

[0060] (Fourth aspect) In the abnormality diagnosis device according to any one of the first to third aspects, an imaging device for acquiring an image signal of the vehicle; an image signal processing unit that processes an image signal output from the imaging device as information about the vehicle; the sound collection control unit controls the sound collection device based on the image signal; An abnormality diagnosis device characterized by the above.

[0061] (Fifth aspect) In the abnormality diagnosis device according to any one of the first to fourth aspects, a notification unit that notifies the abnormality diagnosis result from the abnormality determination unit; An abnormality diagnosis device characterized by the above.

[0062] (Sixth aspect) An abnormality diagnosis system having the abnormality diagnosis device according to any one of the first to fifth aspects and a vehicle information output device that outputs information related to a vehicle, the abnormality diagnosis device includes an information processing unit that processes information about the vehicle output from the vehicle information output device, the sound collection control unit controls at least one of operation of the sound collection device and sound collection timing based on the information output from the information processing unit; An abnormality diagnosis system characterized by the above.

[0063] (Seventh aspect) In the abnormality diagnosis system of the sixth aspect, The vehicle information output device is mounted on a vehicle, the information about the vehicle output from the vehicle information output device includes at least one of the vehicle's identification information, the position and type of equipment installed, the stationary position, the running speed, the start time of entering the platform, the stationary time, and the departure time; An abnormality diagnosis system characterized by the above.

[0064] (Eighth aspect) In the abnormality diagnosis system of the sixth or seventh aspect, A plurality of the sound collecting devices are provided, the sound collection control unit selects at least one of the sound collection devices based on the information output from the information processing unit, the abnormality determination unit determines an abnormality in at least one of the equipment and the wheels based on the acoustic signal output from the selected sound collection device and processed; An abnormality diagnosis system characterized by the above.

[0065] (Ninth aspect) In the abnormality diagnosis system according to any one of the sixth to eighth aspects, the abnormality diagnosis device includes an image capture device that acquires an image signal of the vehicle, and an image capture control unit that controls at least one of the operation of the image capture device and the image capture timing based on information output from the information processing unit; An abnormality diagnosis system characterized by the above. [Explanation of symbols]

[0066] 1. Platform 3...Roof 10...Railway vehicles 11... Orbit 12...Race surface 13...Wheel 14...Cart 15, 15b, 15d, 16...Equipment 20...Vehicle information output device 21, 21a, 21b, 21c, 21d, 21e, 31...Sound collection device 22...Vehicle information processing unit 23...Sound pickup control section 24...Audio signal processing unit 25...Vehicle information recording unit 26...Abnormality diagnosis section 27…Information Department 41...Photographing equipment 42...imaging control unit 43...Image signal processing unit 100...Train station premises 101, 102…space 110…Direction of travel

Claims

1. An abnormality diagnosis device for diagnosing abnormalities in at least one of a device and a wheel provided on a vehicle, a sound pickup device for acquiring an acoustic signal; an acoustic signal processing unit that processes an acoustic signal output from the sound collection device; an abnormality determination unit that determines an abnormality in at least one of the equipment and the wheels based on the processing result in the acoustic signal processing unit; a sound collection control unit that controls the sound collection device based on information about the vehicle, The sound collection device is installed in a space provided above or below the platform; An abnormality diagnosis device characterized by the above.

2. 2. The abnormality diagnosis device according to claim 1, The sound collection device is installed near at least one of equipment and wheels of a vehicle stationary near a platform; An abnormality diagnosis device characterized by the above.

3. 2. The abnormality diagnosis device according to claim 1, The sound collection device is a directional sound collection device; An abnormality diagnosis device characterized by the above.

4. 2. The abnormality diagnosis device according to claim 1, an imaging device for acquiring an image signal of the vehicle; an image signal processing unit that processes an image signal output from the imaging device as information about the vehicle; the sound collection control unit controls the sound collection device based on the image signal; An abnormality diagnosis device characterized by the above.

5. 2. The abnormality diagnosis device according to claim 1, a notification unit that notifies the abnormality diagnosis result from the abnormality determination unit; An abnormality diagnosis device characterized by the above.

6. An abnormality diagnosis system including the abnormality diagnosis device according to any one of claims 1 to 5 and a vehicle information output device that outputs information about a vehicle, the abnormality diagnosis device includes an information processing unit that processes information about the vehicle output from the vehicle information output device, the sound collection control unit controls at least one of operation of the sound collection device and sound collection timing based on the information output from the information processing unit; An abnormality diagnosis system characterized by the above.

7. 7. The abnormality diagnosis system according to claim 6, The vehicle information output device is mounted on a vehicle, the information about the vehicle output from the vehicle information output device includes at least one of the following: identification information of the vehicle, the position and type of equipment installed, the stationary position, the running speed, the start time of entering the platform, the stationary time, and the departure time; An abnormality diagnosis system characterized by the above.

8. 7. The abnormality diagnosis system according to claim 6, A plurality of the sound collecting devices are provided, the sound collection control unit selects at least one of the sound collection devices based on the information output from the information processing unit, the abnormality determination unit determines an abnormality in at least one of the equipment and the wheels based on the acoustic signal output from the selected sound collection device and processed; An abnormality diagnosis system characterized by the above.

9. 7. The abnormality diagnosis system according to claim 6, the abnormality diagnosis device includes an image capture device that acquires an image signal of the vehicle, and an image capture control unit that controls at least one of operation of the image capture device and image capture timing based on information output from the information processing unit; An abnormality diagnosis system characterized by the above.

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