JP2005114637A - System for detecting abnormality of vehicle and method therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an effective and reliable system for detecting the abnormality of a vehicle and a method therefor, by detecting the presence of abnormality on a carriage and a vehicle body with sound measurement to integrate with detailed viewing focused body parts and hammering tests when they are put out or put in a rail yard. <P>SOLUTION: The system provides rail joints on a part of a traveling rail in the vehicle base; catches vibrations of the carriage and each portion of the vehicle body with a sound when they are slowly passed through these rail joints at a constant speed (5-10 km/h) by ground equipment; and detects the abnormality by the comparison with a normal state. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

The present invention relates to a system and a detection method for detecting an abnormality of a railway vehicle, and relates to an abnormality detection of a vehicle that is used in combination with visual inspection and hammering inspection for daily inspection.

Conventional daily inspections are mainly visual inspections and hammering inspections, and inspections are made for loose bolts and scratches on carts (including wheels and axles) and body parts.
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The conventional method has a problem that it takes time for inspection and requires many specialized inspectors.

The object of the present invention is to detect whether there is any abnormality in the trolley or the car body when leaving or entering the vehicle base by sound measurement, and by integrating it with detailed visual and hammering inspection that narrows down the site, It is to propose an objective and reliable vehicle abnormality detection system and detection method.

A part of the running rail in the vehicle base is provided with a rail joint, and vibrations of the bogie and each part of the vehicle body when the rail joint passes slowly at a constant speed (5 to 10 km / h) are caught by the ground equipment with sound. This is because an abnormality is detected in comparison with normal times.

In the vehicle abnormality detection system configured as described above, abnormal vibrations (such as chatter vibration due to loosening of bolts) occur in each part of the car body and carriage due to the vibration that the wheels receive when passing through the rail joint. Then, since this can be detected and an alarm can be transmitted, the inspector can carefully perform inspections such as visual inspection and hammering inspection of the part, and can greatly improve the efficiency of daily inspection work. Further, since these data can be accumulated day by day, information such as gradually approaching the abnormal level can be obtained without exceeding the abnormal level, and a detailed inspection is possible. Furthermore, in the future, it is possible to increase the reliability by accumulating data and bring it to a system without a hammering test for further efficiency.

An embodiment of the invention will be described based on an example with reference to the drawings.

FIG. 1 is a system configuration diagram of a vehicle abnormality detection system showing an embodiment of the present invention. In this embodiment, reference numeral 1 denotes a rail installed in the vehicle base, and has a rail joint 2 in the middle. Reference numeral 3 denotes a sound level meter installed in the vicinity of the rail joint 2. In this embodiment, a total of nine sound level meters 31 to 39 in the front and rear and left and right directions are arranged. A data recording device 4 is connected to the sound level meters 31 to 39 and sends output to the data processing device 5.

2 is shown in relation to a vehicle traveling at the installation position of the sound level meter 3 in FIG. 1, 6 is a sleeper, 7 is a roadbed, 8 is a vehicle wheel, 9 is a carriage, 10 is a vehicle body, The sound level meter 3 is attached to the road bed 7 or the sleepers 6.

Data collection by the sound level meter 3 is started from the time when the wheel 8 of the vehicle to be inspected approaches the rail joint 2, and the data is measured until after passing through the rail joint 2. Actually, since the wheels for the axles pass through the rails, all the axle passages of the trained vehicle are recorded.

The data recorded by the data recording device 4 is sent to the data processing device 5 to perform frequency analysis at the time of maximum sound generation when the rail joint 2 passes, and by the difference from the normal frequency analysis result recorded in advance. Detect anomalies.

At this time, keeping the speed when passing through the rail joint 2 increases the detection accuracy. In order to eliminate the influence of background noise, the frequency characteristics of the maximum noise when passing through the rail joint 2 are used. The detection accuracy can be improved by using a signal obtained by subtracting the frequency characteristic of noise before passing through the rail joint 2 as a base. In addition, the rolling noise when the wheels pass through the rail joint mainly consists of low frequency components, and the influence can be reduced by performing frequency analysis. Focusing on peak frequencies that do not appear in normal times is also an effective means for improving detection accuracy. Further, it is preferable that the average data is averaged several times or more, the variation at that time is clarified, and an abnormality is detected when the variation range is exceeded.

Since the present invention is configured as described above, the following effects can be obtained. According to the present embodiment, when a wheel passes through a rail joint, vibration is applied, and abnormal vibration (for example, chatter vibration due to bolt loosening) occurs in the vehicle body or each part of the carriage, and this is detected and alarmed. Therefore, the inspector can carefully perform inspection such as visual inspection and hammering inspection of the part, and can greatly improve the efficiency of daily inspection work. Further, since these data can be accumulated day by day, information such as gradually approaching the abnormal level can be obtained without exceeding the abnormal level, and a detailed inspection is possible. Furthermore, in the future, it is possible to increase the reliability by accumulating data and bring it to a system without a hammering test for further efficiency.

In this embodiment, nine sound level meters 3 are used. However, when the abnormal location can be immediately identified by the frequency of the abnormal sound, the number of set sound level meters may be reduced. If there is a part to be monitored at a specific position, a sound level meter may be attached at a position corresponding to the position. The sound level meter 3 may be arranged on the road bed 7 as a whole, or only the sensor part may be placed, and the other part may be integrated with the data recording device 4. Since the sound level meter is easily affected by rain, it should be installed in the building in the depot.

Furthermore, since the actual vehicle running speed is slightly different from the set speed, the vehicle passage detection sensors are placed at two locations before and after the rail joint to measure the speed at which the rail joint passes, and according to the set speed. It is effective to correct the data.

As described above, according to the present invention, when a vehicle base is delivered or received, it is detected by sound measurement whether there is an abnormality in the carriage or the vehicle body, and integrated with a detailed visual / sound inspection that narrows down the part. Therefore, an efficient and reliable vehicle abnormality detection system and detection method can be provided.

1 is a system configuration diagram of a vehicle abnormality detection system showing an embodiment of the present invention. It is sectional drawing which shows one example of arrangement | positioning of the abnormality detection system of the vehicle by this invention.

Explanation of symbols

1. Rail 2. 2. Rail joint Sound level meter4. 4. Data recording device Data processing device 6. Sleepers 7 Roadbed 8. Wheel 9. Dolly 10. Body

Claims (9)

An abnormality detection system for traveling of a vehicle, comprising a rail joint provided on the rail, a sound level meter provided on the road floor near the rail joint, a data recording device for capturing the output of the sound level meter, and a data processing device, and processing the data An abnormality detection system for a vehicle, wherein an abnormality of a passing vehicle is detected from an analysis result of noise. 2. The vehicle abnormality detection system according to claim 1, wherein a plurality of said sound level meters are provided so that a position on the vehicle side with respect to the detected abnormal sound can be specified. The vehicle abnormality detection system according to claim 1, wherein the rail joint and the sound level meter are provided in a building in a vehicle base so that the sound level meter can be waterproofed. This is a method for detecting abnormalities when a vehicle is running, where rails are provided with rail joints, the output of a sound level meter provided on the roadbed near the rail joints is captured, data processing is performed, and A method for detecting an abnormality of a vehicle, wherein noise due to vibrations of each part of the vehicle body is detected and the abnormality is detected by comparison with noise in normal times. 5. The vehicle abnormality detection method according to claim 4, wherein a speed of passing through the rail joint is set to a constant low speed so that comparison with normal noise is easy. 5. The vehicle abnormality detection method according to claim 4, wherein a vehicle detection sensor is placed at two positions before and after the rail joint, the speed of the vehicle passing through the rail joint is measured, and a speed correction corresponding to normal data is performed. A vehicle abnormality detection method. In the vehicle abnormality detection method according to claim 4, the detected noise is subjected to frequency analysis, and the abnormality is detected by comparison with the same analysis result in a normal state, thereby reducing the influence of the rolling noise of the wheel. A vehicle abnormality detection method as a feature. 5. The vehicle abnormality detection method according to claim 4, wherein the influence of background noise is reduced by detecting the abnormality by comparing with the data immediately before passing through the rail joint. 5. The vehicle abnormality detection method according to claim 4, wherein the abnormality detection is performed as a daily inspection, and when abnormality occurs, a sound abnormality inspection is performed to identify a true abnormality portion. Detection method.