WO2015019415A1 - 列車内監視方法及び列車内監視システム - Google Patents
列車内監視方法及び列車内監視システム Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 54
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- 238000001514 detection method Methods 0.000 claims abstract description 11
- 238000006243 chemical reaction Methods 0.000 claims description 5
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- 238000007726 management method Methods 0.000 description 6
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- 238000004378 air conditioning Methods 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V20/00—Scenes; Scene-specific elements
- G06V20/50—Context or environment of the image
- G06V20/52—Surveillance or monitoring of activities, e.g. for recognising suspicious objects
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C5/00—Registering or indicating the working of vehicles
- G07C5/08—Registering or indicating performance data other than driving, working, idle, or waiting time, with or without registering driving, working, idle or waiting time
- G07C5/0841—Registering performance data
- G07C5/085—Registering performance data using electronic data carriers
- G07C5/0866—Registering performance data using electronic data carriers the electronic data carrier being a digital video recorder in combination with video camera
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L15/00—Indicators provided on the vehicle or train for signalling purposes
- B61L15/0081—On-board diagnosis or maintenance
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L99/00—Subject matter not provided for in other groups of this subclass
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L15/00—Indicators provided on the vehicle or train for signalling purposes
- B61L15/0018—Communication with or on the vehicle or train
- B61L15/0036—Conductor-based, e.g. using CAN-Bus, train-line or optical fibres
Definitions
- the present invention relates to an in-train monitoring method and an in-train monitoring system.
- Patent Document 1 discloses that “a moving image capturing unit that captures a moving image with a camera mounted on a moving body, an image acquiring unit that acquires an image from the captured moving image with a predetermined sampling period, Unique information acquisition means for acquiring unique unique information, unique information transmission means for transmitting the acquired unique information to a predetermined server for acquiring a time stamp, event detection means for detecting occurrence of an event, and the event
- a drive recorder comprising: moving image storage means for storing moving images of at least a predetermined recording time before the occurrence of an event when an event is detected by the detecting means. The drive recorder records image information in the data storage unit while updating the moving image from the acquired predetermined recording time to the present.
- the acquired image information is stored as it is. For this reason, there is a problem that the use efficiency of the memory is low.
- the present invention has been made in view of the above, and an object of the present invention is to obtain an in-train monitoring method capable of acquiring image information before and after an event occurrence and having high memory use efficiency.
- the present invention is an in-train monitoring method for monitoring the inside of a train and recording information in a monitoring information recording device having a temporary memory and a storage memory, and comprising a camera Acquiring the image information, the monitoring information recording device temporarily recording the image information data of the camera in the temporary memory, and when an event occurs, the monitoring information recording device includes the temporary memory. Recording the image information data recorded in the storage memory without changing the file size for a period before and after the event from the time when the occurrence of the event is detected, and the monitoring information recording device, The image information data recorded in the memory is processed so that the file size becomes smaller after a certain period of time, and is recorded in the storage memory.
- a step, wherein the monitoring information recording device is characterized in that it comprises, discarding step the data of the image information of the temporary memory.
- the present invention it is possible to acquire image information before and after the occurrence of an event, and it is possible to obtain an in-train monitoring method with high memory use efficiency.
- FIG. 1 is a diagram illustrating trains that can implement the in-train monitoring method according to the first embodiment.
- FIG. 2 is a diagram illustrating a configuration of the monitoring information recording device in the in-train monitoring system according to the first embodiment.
- FIG. 3 is a flowchart illustrating a procedure for sending image information acquired by the monitoring camera to the monitoring information recording apparatus in the in-train monitoring method according to the first embodiment.
- FIG. 4 is a diagram illustrating the structure of the data in the temporary image memory and the data in the image storage memory when no event occurs and when the event occurs in the in-train monitoring method according to the first embodiment.
- FIG. 5 is a diagram illustrating a configuration of a monitoring information recording device in the in-train monitoring system according to the second embodiment.
- FIG. 6 is a flowchart for explaining a procedure of sending voice information acquired by the microphone to the monitoring information recording apparatus in the in-train monitoring method according to the second embodiment.
- FIG. 1 is a diagram showing a train capable of implementing the first embodiment of the in-train monitoring method according to the present invention.
- the train shown in FIG. 1 is an n-car train in which n cars (n is a natural number) 15-1 to 15-n are connected.
- the leading vehicle 15-1 includes a monitoring information recording device 10, a vehicle information management device 11, a mass control 12, a brake device 13, a broadcasting device 14, monitoring cameras 16-1a and 16-1b, And a reporting device 17-1.
- the vehicle 15-2 includes monitoring cameras 16-2a and 16-2b and emergency call devices 17-2a and 17-2b.
- Vehicles other than the vehicle 15-1 have the same configuration as the vehicle 15-2, and the vehicle 15-n includes monitoring cameras 16-na and 16-nb and emergency call devices 17-na and 17-nb. .
- the monitoring information recording device 10 is connected to the inside of the vehicle by monitoring cameras 16-1a, 16-1b, 16-2a, 16-2b, 16-na, and 16-nb (hereinafter collectively referred to as the monitoring camera 16).
- This is an apparatus for recording acquired image information.
- FIG. 2 is a diagram showing the configuration of the monitoring information recording device 10.
- the monitoring information recording apparatus 10 includes a CPU 20, a temporary image memory 21, and an image storage memory 23.
- the vehicle information management device 11 collects various in-vehicle devices such as power running and braking of each vehicle, departure inspection, in-vehicle air conditioning management, destination display device, in-vehicle guidance display device in the n-car train shown in FIG. to manage.
- the mascon 12 is installed in the cab and remotely controls the speed of the railway vehicle.
- the brake device 13 decelerates the railway vehicle.
- the broadcasting device 14 is connected to an emergency call device 17-1, 17-2a, 17-2b, 17-na, 17-nb (hereinafter collectively referred to as an emergency call device 17) of each vehicle. This makes it possible to make calls between these emergency callers and the crew room (driver's seat).
- the surveillance camera 16 acquires image information.
- Image information refers to information that can be recognized visually, and image information includes moving images and still images.
- the monitoring camera 16 is installed at a position where the inside of the vehicle can be monitored, and a plurality of monitoring cameras 16 are provided as necessary. Moreover, the monitoring camera 16 may be installed in the vicinity of the door in order to monitor the abnormal opening and closing of the door, or may be installed in the crew room. All the monitoring cameras 16 are connected to the monitoring information recording apparatus 10, and all the image information acquired by the monitoring camera 16 is sent to the monitoring information recording apparatus 10. A procedure for sending the image information acquired by the monitoring camera 16 to the monitoring information recording apparatus 10 will be described below with reference to FIG.
- FIG. 3 is a flowchart for explaining a procedure for sending image information acquired by the monitoring camera 16 to the monitoring information recording apparatus 10.
- the monitoring camera 16 acquires image information (step S1).
- the acquired image information data is temporarily recorded in the temporary image memory 21 of the monitoring information recording apparatus 10 (step S2).
- the data to be recorded is recorded in the temporary image memory 21 in a format including a lot of information. For example, if the image information is a still image, it is recorded at a high resolution, and if it is a moving image, it is recorded at a high resolution and a high frame rate. Thereafter, it is determined whether an event has occurred (step S3).
- the monitoring information recording apparatus 10 records the image in the temporary image memory 21 for the recording period before and after the event set according to the type of event.
- the information data is recorded in the image storage memory 23 without performing processing for reducing the file size (step S4). That is, the image information data (data before the event occurrence) recorded in the temporary image memory 21 for a period that is a predetermined period after the event occurrence detection time and the predetermined period from the event occurrence detection time are detected.
- the image information data (data after the occurrence of the event) to be acquired and the image storage memory 23 are recorded without processing until the time elapses.
- processing to reduce the file size includes reduction of resolution or compression by a compression method with a high compression rate.
- the image information is a moving image
- the image information data recorded in the temporary image memory 21 may be a moving image
- the image information data recorded in the image storage memory 23 may be a still image.
- the image information is a still image
- a part of the data may be deleted at regular intervals when recording in the image storage memory 23.
- the image information One of the two still images recorded in the temporary memory 21 may be recorded in the image storage memory 23.
- step S5 it is determined whether or not a predetermined period has elapsed regardless of whether or not an event has been detected.
- the “predetermined period” is a period in which image information is accumulated in the temporary image memory 21 and 1 ⁇ 2 of the recording capacity of the temporary image memory 21 is filled. For example, occurrence of an event Sometimes, it may be set to about twice the maximum of the “period of recording image information in the temporary image memory 21 without being processed in the image storage memory 23”.
- step S5 If the predetermined period has not elapsed (branch to No in step S5), the process returns to step S1, and the surveillance camera 16 continues to acquire image information.
- the monitoring information recording device 10 reduces the file size of the first half of the image information data recorded in the temporary image memory 21.
- the processed data is processed (step S6), the processed data is recorded in the image storage memory 23 (step S7), and the data of the image information stored in the image storage memory 23 is processed from the image information data in the image temporary memory 21. Is discarded (step S8).
- the data recorded in the image storage memory 23 processed so as to reduce the file size and the data recorded in the image storage memory 23 without being processed coexist. However, data processed so as to reduce the file size may be deleted.
- step S6 the processing performed to reduce the file size is performed only for the first half of the image information data recorded in the temporary image memory 21.
- step S6 when all of the image information data recorded in the temporary image memory 21 is processed and discarded all at once, the processing is started again to start acquiring image information (step S1). However, when an event occurs immediately after the start, the image information data recorded in the temporary image memory 21 is discarded before the event occurrence, and the image information data before the event occurrence is processed. This is because the image data cannot be stored in the image storage memory 23 without doing so.
- the processing for reducing the file size is performed only for the first half of the image information data recorded in the temporary image memory 21, so that the event is started immediately after starting the processing again. Even if it occurs, the raw image information data can be stored in the image storage memory 23.
- step S6 the process starts 5 minutes after the predetermined period has elapsed (that is, after 10 minutes have elapsed). 5 minutes) of image information data is processed (step S6), and the processed data is recorded in the image storage memory 23 (step S7), and the temporary image memory 21 is processed. The data for 5 minutes is discarded (step S8). Thereafter, the processing is started again to start acquiring image information (step S1).
- Step S6 Image information data 10 minutes after the start, i.e., 20 minutes after the start of the first process, and 5 minutes after the start of the process (i.e., 5 to 15 minutes after the start of the first process) (Step S6), the processed 10-minute data is recorded in the image storage memory 23 (step S7), and the processed 10-minute data in the temporary image memory 21 is discarded (step S8).
- step S1 the second half of the data remains in the temporary image memory 21. Even if an event occurs immediately after the start, raw data can be saved approximately 5 minutes after the event occurrence.
- the data recorded by processing so as to reduce the file size and the data recorded without processing may be recorded in the image storage memory 23 without coexistence.
- the memory use efficiency of the image storage memory 23 is further improved.
- the timing of the “predetermined period” in step S5 is stopped, and after the recording period before and after the occurrence of the event at the occurrence of the event, the image storage memory 23 is stopped.
- the recorded data may be deleted from the temporary image memory 21, and then the “predetermined period” in step S5 may be counted again.
- step S5 For example, if the “predetermined period” in step S5 is 10 minutes, and an “event that records without processing the 3 minutes before occurrence and 3 minutes after occurrence” occurs 4 minutes after the start, the time is 4 minutes.
- the data for 3 minutes before the occurrence recorded in the temporary image memory 21 and the data acquired for 3 minutes after the occurrence are recorded in the image storage memory 23.
- the data recorded in the image storage memory 23 is discarded from the image temporary memory 21 when recording to the image storage memory 23 is completed. Then, the time measurement is restarted from the point of 4 minutes when it is stopped, and when it reaches 10 minutes, the process proceeds to step S6.
- the information as it is is recorded in the image storage memory 23 without being compressed only when the occurrence of the event is detected, there is a large amount of information before and after the occurrence of the event (high frame rate or high resolution).
- Image information data is recorded, and when no event occurs, image information with a small amount of information (low frame rate or low resolution) is recorded. Therefore, more detailed information can be obtained before and after the occurrence of an event, and the amount of memory used can be suppressed when no event occurs, so the memory usage efficiency is high.
- Detecting the occurrence of an event is performed by sending a signal (event signal) indicating that an event has occurred to the CPU 20.
- the event signal may be sent from the vehicle information management device 11 to the monitoring information recording device 10, for example. This is because the vehicle information management apparatus 11 grasps information on train speed, notch change, brake (including emergency brake), emergency notification, and abnormal door opening / closing. Further, emergency brake information may be sent from the brake device 13 to the monitoring information recording device 10. Further, emergency notification information may be sent from the broadcast device 14 to the monitoring information recording device 10.
- examples of the abnormal opening and closing of the door include opening the door during traveling and opening the door at a location other than the station during retreat.
- FIG. 4 is a diagram showing an example of the structure of data recorded in the image temporary memory 21 and data stored in the image storage memory 23 during normal times (when no event occurs) and when an event occurs.
- 4A-1 shows data recorded in the normal image temporary memory 21
- FIG. 4A-2 shows data stored in the normal image storage memory 23
- FIG. 4B-1 shows data recorded in the image temporary memory 21 when an event occurs
- FIG. 4B-2 shows data stored in the image storage memory 23 when an event occurs. Show.
- the file size of the moving image data recorded in the temporary image memory 21 is reduced and recorded in the image storage memory 23.
- the moving image data recorded in the temporary image memory 21 for a predetermined period before and after the occurrence of the (emergency) event are recorded as they are without reducing the frame rate.
- t seconds recorded as it is without reducing the frame rate is determined according to the type of event.
- the recording period may be 5 minutes and 5 minutes after the event occurs.
- the event that has occurred is “emergency brake”, for example, only one minute after the occurrence of the event may be set as the recording period.
- the in-train monitoring method of the present embodiment described above is an in-train monitoring method that monitors the inside of a train and records information in a monitoring information recording device that includes a temporary memory and a storage memory.
- a step of acquiring, a step of temporarily recording the image information data of the camera in the temporary memory by the monitoring information recording device, and an event occurrence, the monitoring information recording device recording the temporary information in the temporary memory The image information data is recorded in the storage memory without changing the file size for a period before and after the event detection from the time when the occurrence of the event is detected, and the monitoring information recording device records the data in the temporary memory.
- the CPU 20 may execute the above-described in-train monitoring method program.
- an in-train monitoring system can be configured by applying the above-described in-train monitoring method.
- the in-train monitoring system of the present embodiment stores a camera that monitors the inside of a train to acquire image information, a temporary memory in which the image information is temporarily recorded, and a part of the data in the temporary memory.
- a monitoring information recording device having a storage memory, wherein the monitoring information recording device reduces the file size of the image information data recorded in the temporary memory after a certain period of time has elapsed. Is processed and recorded in the storage memory, and when an event occurs, the data of the image information recorded in the temporary memory is not processed for a period before and after the event from the time when the occurrence of the event is detected. It is recorded in a storage memory, and after recording in the storage memory, the image information data in the temporary memory is discarded.
- the in-train monitoring method or the in-train monitoring system of the present embodiment it is possible to acquire image information before and after the occurrence of an event, and an in-train monitoring system with high memory use efficiency. Obtainable.
- Embodiment 2 the mode of acquiring only image information has been described, but the present invention is not limited to this. In this embodiment, a mode in which audio information is acquired together with image information will be described. In the following description, the same reference numerals are used for the same configurations as in the first embodiment.
- FIG. 5 is a diagram showing the monitoring information recording apparatus 10a of the present embodiment.
- the monitoring information recording apparatus 10a includes a CPU 20, an image temporary memory 21, an image storage memory 23, an audio temporary memory 22, and an audio storage memory 24.
- the audio temporary memory 22 and the audio The monitoring information recording apparatus 10 of the first embodiment is different from the monitoring information recording apparatus 10 of the first embodiment in that the storage memory 24 is provided.
- a monitoring camera 16 is connected to the temporary image memory 21, and an emergency call device 17 is connected to the temporary sound memory 22.
- the microphone different from the emergency alert device 17 may be provided separately.
- Both the image information data acquired by the monitoring camera 16 and the audio information data acquired by the microphone are assigned a time (or time stamp), an event ID, and the like, and the image information and the audio information can be synchronized. Make it possible.
- FIG. 6 is a flowchart for explaining a procedure for sending voice information acquired by the microphone provided in the emergency call device 17 to the monitoring information recording apparatus 10a.
- the microphone acquires audio information (step S11).
- the acquired audio information is temporarily recorded in the audio temporary memory 22 of the monitoring information recording device 10a (step S12). Thereafter, it is determined whether an event has occurred (step S13).
- the monitoring information recording device 10a When the occurrence of an event is detected (branch to Yes in step S13), the monitoring information recording device 10a has a predetermined period from the time when the occurrence of the event is detected before and after the occurrence of the event set according to the type of event. Audio information data (data before event occurrence) recorded in the temporary audio memory 22 for a period that is traced back, and audio information data (event occurrence) acquired until a predetermined period elapses after the event occurrence is detected. The later data) is recorded in the audio storage memory 24 (step S14).
- the “predetermined period” is a period in which audio information is accumulated in the audio temporary memory 22 and 1 ⁇ 2 of the recording capacity of the audio temporary memory 22 is filled. It may be equal to the “predetermined period” in the step of recording image information.
- step S15 If the predetermined period has not elapsed (branch to No in step S15), the process returns to step S11, and the microphone continues to acquire audio information. If the predetermined period has elapsed (branch to Yes in step S15), the monitoring information recording device 10a uses the first half of the audio information data in the audio temporary memory 22 regardless of whether an event has occurred or not. Discard (step S16).
- step S15 may be stopped when an event occurs or may not be stopped.
- step S16 the data discarded from the audio temporary memory 22 is data up to the first half, and the rear half is not discarded.
- step S16 when all of the audio information data recorded in the audio temporary memory 22 is discarded all at once, the process is started again to start acquiring audio information (step S11). If an event occurs immediately after that, the audio information data recorded in the temporary audio memory 22 is discarded before the event occurrence, and the audio information data before the event occurrence is stored in the audio storage memory. This is because the data cannot be stored in 24. As described above, this is a case where an event occurs immediately after starting the process again by leaving the latter half of the audio information data recorded in the audio temporary memory 22 when the predetermined period has elapsed and discarding it. However, the audio information data can be stored in the audio storage memory 24.
- the process starts after the predetermined period has elapsed (that is, after 10 minutes have elapsed). (5 minutes)
- the voice information data in the voice temporary memory 22 is discarded (step S16). Thereafter, the process is started again to start acquiring voice information (step S11). If no event occurs (branch to No in step S13), the process is started again, and after a predetermined period has passed (the process is again executed). After 10 minutes from the start, that is, after 20 minutes from the start of the first process, the data is restarted after 5 minutes (that is, from 5 to 15 minutes from the start of the first process). (Step S16).
- step S11 the data for the acquisition of the audio information is acquired because the latter half of the data remains in the audio temporary memory 22. Even if an event occurs immediately after the start, the audio information data can be saved approximately 5 minutes after the event.
- audio information can be recorded in the monitoring information recording device 10a. Since the audio information stored in the audio storage memory 24 is attached with time information, event ID, and the like, the image information acquired by the monitoring camera 16 and recorded in the image storage memory 23 in the procedure shown in FIG. Can be synchronized.
- the image storage memory 23 and the audio storage memory 24 may be provided in different areas of the same storage device, or may be provided in different storage devices.
- both image information and audio information can be acquired, and the acquired image information and audio information can be synchronized.
- the in-train monitoring method of the present invention varies the recording period of image information depending on the type of event.
- Table 1 is a specific example showing the event contents, the recording period, the presence / absence of recording data acquisition, and the monitored car.
- the image temporary memory 21 is used to obtain the recording data.
- the image information and audio information recorded in the temporary audio memory 22 for 3 minutes before the event occurrence and for 5 minutes after the event occurrence are recorded in the image storage memory 23 and the audio storage memory 24, respectively.
- the recording may be performed only while the voice of the emergency caller is detected.
- the image information and audio information recorded in this way can increase the use efficiency of the memory if the period to be acquired and the monitored car are changed according to the type of event.
- the in-train monitoring method of the present embodiment described above is an in-train monitoring method for monitoring the inside of a train and recording information in a monitoring information recording device having a temporary memory and a storage memory, in which the camera stores time data.
- a step of acquiring image information including; a step of acquiring sound information including time data by a microphone; and a step of temporarily recording the image information data of the camera in a temporary image memory by the monitoring information recording device.
- the monitoring information recording device temporarily recording the audio information data of the microphone in the audio temporary memory; and when the event occurs, the monitoring information recording device records the image in the image temporary memory.
- the information storage memo is stored in the image storage memo without changing the file size for the period before and after the occurrence of the event.
- the CPU 20 may execute the above-described in-train monitoring method program.
- an in-train monitoring system can be configured by applying the above-described in-train monitoring method.
- the in-train monitoring system of the present embodiment includes a camera that monitors the inside of a train and acquires image information, a microphone that acquires audio information, a temporary image memory in which the image information is temporarily recorded, and the image An image storage memory in which part of the data in the temporary memory is stored, an audio temporary memory in which the audio information is temporarily recorded, and an audio storage in which a part of the data in the audio temporary memory is stored
- a monitoring information recording device having a memory, wherein the monitoring information recording device has a file size of the image information data recorded in the temporary image memory after a certain period of time has elapsed.
- the image information data recorded in the temporary image memory is detected as the occurrence of the event. Recorded in the image storage memory without processing only the period before and after according to the event, and the audio information data recorded in the audio temporary memory before and after the event detection from the occurrence of the event It is recorded in the audio storage memory only for a period, and after recording in the storage memory, the image information data in the image temporary memory and the audio information data in the audio temporary memory are discarded.
- the in-train monitoring method and the in-train monitoring system according to the present invention are useful for a train including a monitoring camera.
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Abstract
Description
図1は、本発明にかかる列車内監視方法の実施の形態1を実施可能な列車を示す図である。図1に示す列車は、n両(nは自然数)の車両15-1~15-nが連結されたn両編成の列車である。先頭車両である車両15-1は、監視情報記録装置10と、車両情報管理装置11と、マスコン12と、ブレーキ装置13と、放送装置14と、監視カメラ16-1a,16-1bと、非常通報器17-1と、を備える。車両15-2は、監視カメラ16-2a,16-2bと、非常通報器17-2a,17-2bと、を備える。車両15-1以外の車両は車両15-2と同様の構成であり、車両15-nは、監視カメラ16-na,16-nbと、非常通報器17-na,17-nbと、を備える。
実施の形態1では、画像情報のみを取得する形態について説明したが、本発明はこれに限定されない。本実施の形態では、画像情報とともに音声情報を取得する形態について説明する。なお、以下の説明において、実施の形態1と同様の構成であるものには同じ符号を用いるものとする。
Claims (14)
- 列車内を監視して、一時メモリ及び保存メモリを備える監視情報記録装置に情報を記録する列車内監視方法であって、
カメラが画像情報を取得するステップと、
前記監視情報記録装置が前記カメラの前記画像情報のデータを前記一時メモリに一時的に記録するステップと、
イベント発生時には、前記監視情報記録装置が、前記一時メモリに記録した前記画像情報のデータを、前記イベントの発生検知時から前記イベントに応じた前後期間だけファイルサイズを加工せずに前記保存メモリに記録するステップと、
前記監視情報記録装置が、前記一時メモリに記録した前記画像情報のデータを、一定期間経過後に、ファイルサイズが小さくなるように加工して前記保存メモリに記録するステップと、
前記監視情報記録装置が前記一時メモリの前記画像情報のデータを破棄するステップと、を含むことを特徴とする列車内監視方法。 - 列車内を監視して、一時メモリ及び保存メモリを備える監視情報記録装置に情報を記録する列車内監視方法であって、
カメラが時刻データを含む画像情報を取得するステップと、
マイクが時刻データを含む音声情報を取得するステップと、
前記監視情報記録装置が前記カメラの前記画像情報のデータを画像用一時メモリに一時的に記録するステップと、
前記監視情報記録装置が前記マイクの前記音声情報のデータを音声用一時メモリに一時的に記録するステップと、
イベント発生時には、前記監視情報記録装置が、前記画像用一時メモリに記録した前記画像情報のデータを、前記イベントの発生検知時から前記イベントに応じた前後期間だけファイルサイズを加工せずに前記画像用保存メモリに記録し、前記音声用一時メモリに記録した前記音声情報のデータを、前記イベントの発生検知時から前記イベントに応じた前後期間だけ音声用保存メモリに記録するステップと、
前記監視情報記録装置が、前記画像用一時メモリに記録した前記画像情報のデータを、一定期間経過後に、ファイルサイズが小さくなるように加工して画像用保存メモリに記録するステップと、
前記監視情報記録装置が前記画像用一時メモリ及び前記音声用一時メモリの前記画像情報のデータを破棄するステップと、を含むことを特徴とする列車内監視方法。 - ファイルサイズを小さくする前記加工が、低フレームレートへの変換であることを特徴とする請求項1または請求項2に記載の列車内監視方法。
- ファイルサイズを小さくする前記加工が、動画データから静止画データへの変換であることを特徴とする請求項1または請求項2に記載の列車内監視方法。
- ファイルサイズを小さくする前記加工が、ファイルの圧縮であることを特徴とする請求項1または請求項2に記載の列車内監視方法。
- ファイルサイズを小さくする前記加工が、解像度の低減であることを特徴とする請求項1または請求項2に記載の列車内監視方法。
- ファイルサイズを小さくする前記加工が、データの一部の削除であることを特徴とする請求項1または請求項2に記載の列車内監視方法。
- 列車内を監視して画像情報を取得するカメラと、前記画像情報が一時的に記録される一時メモリ及び前記一時メモリのデータの一部が保存される保存メモリを有する監視情報記録装置と、を備える列車内監視システムであって、
前記監視情報記録装置が、前記一時メモリに記録された前記画像情報のデータを、一定期間経過後に、ファイルサイズが小さくなるように加工して前記保存メモリに記録し、イベント発生時には、前記一時メモリに記録した前記画像情報のデータを、前記イベントの発生検知時から前記イベントに応じた前後期間だけ加工せずに前記保存メモリに記録し、
前記保存メモリへの記録後に前記一時メモリの前記画像情報のデータは破棄されることを特徴とする列車内監視システム。 - 列車内を監視して画像情報を取得するカメラと、音声情報を取得するマイクと、前記画像情報が一時的に記録される画像用一時メモリ、前記画像用一時メモリのデータの一部が保存される画像用保存メモリ、前記音声情報が一時的に記録される音声用一時メモリ、及び前記音声用一時メモリのデータの一部が保存される音声用保存メモリを有する監視情報記録装置と、を備える列車内監視システムであって、
前記監視情報記録装置が、前記画像用一時メモリに記録された前記画像情報のデータを、一定期間経過後に、ファイルサイズが小さくなるように加工して前記画像用保存メモリに記録し、イベント発生時には、前記画像用一時メモリに記録した前記画像情報のデータを、前記イベントの発生検知時から前記イベントに応じた前後期間だけ加工せずに前記画像用保存メモリに記録し、前記音声用一時メモリに記録した前記音声情報のデータを、前記イベントの発生検知時から前記イベントに応じた前後期間だけ前記音声用保存メモリに記録し、
前記保存メモリへの記録後に前記画像用一時メモリの前記画像情報のデータ及び前記音声用一時メモリの前記音声情報のデータを破棄することを特徴とする列車内監視システム。 - ファイルサイズを小さくする前記加工が、低フレームレートへの変換であることを特徴とする請求項8または請求項9に記載の列車内監視システム。
- ファイルサイズを小さくする前記加工が、動画データから静止画データへの変換であることを特徴とする請求項8または請求項9に記載の列車内監視システム。
- ファイルサイズを小さくする前記加工が、ファイルの圧縮であることを特徴とする請求項8または請求項9に記載の列車内監視システム。
- ファイルサイズを小さくする前記加工が、解像度の低減であることを特徴とする請求項8または請求項9に記載の列車内監視システム。
- ファイルサイズを小さくする前記加工が、データの一部の削除であることを特徴とする請求項8または請求項9に記載の列車内監視システム。
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