JP2019039857A - Evaluation method of in-car noise due to rail wavy abrasion, in-car noise evaluation system, and rail maintenance method using the same - Google Patents

Abstract

To provide an evaluation method of in-car noises due to rail wavy abrasion and in-car noise evaluation system capable of detecting rail wavy abrasion, which was hard to evaluate with a conventional rail wavy abrasion detection method, and capable of evaluating whether or not the rail wavy abrasion affects on in-car comfort, and a rail maintenance method using the same.SOLUTION: The evaluation method comprises the steps of: generating a piece of floor noise data on a floor of a car with first measurement means installed on the floor of the car; generating a piece of in-car noise data with second measurement means installed in the car; determining a generation segment of the rail wavy abrasion on the railroad using the floor noise data; and evaluating the in-car comfort due to the rail wavy abrasion using the in-car noise data.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a method for evaluating vehicle interior noise accompanying rail corrugated wear, a vehicle interior noise evaluation system using this evaluation method, and a rail maintenance method using the same.

  Conventionally, for the purpose of maintenance management of railway tracks, waveform data such as track inspection data is periodically acquired using a dedicated track inspection vehicle, etc., and a significant value included in the track inspection data is detected. The railway track is checked for irregularities that threaten the running safety of the railway vehicles and irregularities that reduce the riding comfort of the railway vehicles. We are considering the implementation of repairs. In addition, track inspection data is acquired several times a year for conventional lines using a dedicated track inspection vehicle, and several times a month for Shinkansen lines. However, in recent years, it has become possible to acquire trajectory inspection data with a high frequency of several times a day in many cases by using a trajectory inspection device that can be mounted on a commercial vehicle. ing.

  In recent years, sightseeing trains have been implemented or planned with improved guest room service using luxurious sightseeing trains. In such a tourist train, the noise in the vehicle gives an unpleasant impression to the passengers, and therefore, means for efficiently grasping the generation of the noise in the vehicle due to the rail-like wear and taking necessary measures are being studied. . The rail wave wear refers to periodic and fine rail irregularities formed on the rail surface as the railway vehicle repeatedly travels.

  Here, various measuring methods are conventionally known as a measuring method of rail corrugated wear. The rail wave-like wear detection method shown in Patent Document 1 generates time axis data from vibration acceleration or noise data measured on a vehicle, converts the time axis data into spatial axis data associated with the travel distance of the vehicle, This spatial axis data is subjected to a filtering process on the spatial frequency axis to generate filtering data, and a measuring method is adopted in which the section where the wavy wear of the rail is specified is specified by the filtering data.

  Various evaluation methods are known for evaluating vehicle interior noise. For example, as shown in Patent Document 2, a vehicle running vibration / noise analysis system using a GPS antenna, a three-axis acceleration sensor, and a noise meter is adopted. ing. There is also known a method of simply measuring a noise level by bringing a sound level meter into a vehicle.

Japanese Patent No. 5433516 Japanese Patent No. 4914785

  However, according to the rail corrugated wear detection method described in Patent Document 1, since the time axis data is converted into the spatial axis data and the filtering process is performed, the track maintenance for reducing the vehicle interior noise caused by the rail corrugated wear is performed. Although there is an advantage that the work location can be easily selected, the effect of the generated rail corrugation on the in-car comfort in the car, or the noise generated by the rail corrugation is in-vehicle comfort. It was not possible to evaluate whether it would affect

  In addition, the vehicle running vibration / noise analysis system described in Patent Document 2 does not evaluate the influence of rail corrugation on the in-vehicle comfort in the vehicle. There was a problem that it was not possible to evaluate the contribution of rail corrugation to comfort.

  Evaluation of in-vehicle comfort should be evaluated by measuring in-vehicle noise. However, in the method and apparatus for measuring rail wavy wear, which can cause in-vehicle comfort, the in-vehicle noise is evaluated. There is a problem that it is impossible to simultaneously grasp and manage the presence or absence of occurrence of rail corrugated wear and the evaluation of in-vehicle comfort with a single device.

  Therefore, the present invention has been made in view of the above-described problems, and detects the occurrence of rail corrugated wear, which could not be evaluated by the conventional rail corrugated wear detection method, and affects the interior comfort by the rail corrugated wear. It is an object of the present invention to provide an in-vehicle noise evaluation method and an in-vehicle noise evaluation system that can be used to evaluate whether or not there is a rail wavy wear, and a rail maintenance method using the same.

  The vehicle interior noise evaluation method according to the present invention is a vehicle interior noise evaluation method for a vehicle traveling on a track, and the floor noise on the floor surface of the vehicle is measured by a first measuring means installed on the floor surface of the vehicle. Generating data, generating in-vehicle noise data in the vehicle by a second measuring means installed in the vehicle of the vehicle, using the floor noise data to determine the occurrence section of rail corrugated wear of the track, In-vehicle comfort data associated with the rail corrugated wear is evaluated using in-vehicle noise data.

  In the vehicle interior noise evaluation method according to the present invention, it is preferable that the first measuring means is stored in a storage box.

  In the vehicle interior noise evaluation method according to the present invention, it is preferable that the storage box is open only on the lower surface.

  An in-vehicle noise evaluation system according to the present invention is an in-vehicle noise evaluation system for a vehicle traveling on a track, and includes first measuring means for generating floor noise data on a floor surface in the vehicle, A second measuring means for generating in-vehicle noise data; and an information processing means for determining a rail corrugated wear occurrence section of the track and evaluating in-vehicle comfort using the floor noise data and the in-vehicle noise data. It is characterized by providing.

  In the vehicle interior noise evaluation system according to the present invention, it is preferable that the first measuring means is stored in a storage box, and the storage box is placed on the floor surface.

  In the in-vehicle noise evaluation system according to the present invention, it is preferable that the second measuring means is installed in the vehicle.

  The rail maintenance method according to the present invention is characterized in that rail-like wear is maintained based on an index determined using the above-described vehicle interior noise evaluation system.

  An in-vehicle noise evaluation method, an in-vehicle noise evaluation system, and a rail maintenance method according to the present invention can be performed by measuring the presence or absence of wavy wear on a rail periodically, for example, once to several times a year. A maintenance cycle related to wavy wear management can be established, and quantitative in-vehicle comfort can be provided by instructing track maintenance work to reduce in-vehicle noise such as rail correction or rail replacement at necessary locations according to measurement results. Can be improved. At that time, by simultaneously evaluating the in-vehicle noise, it is possible to select a section having a high effect of improving the in-vehicle comfort, or to construct the in-vehicle comfort itself as an evaluation index.

1 is a schematic diagram of a vehicle provided with a vehicle interior noise evaluation system according to the present embodiment. 1 is a schematic diagram of a vehicle interior noise evaluation system according to the present embodiment. The flowchart of the data processing of the vehicle interior noise evaluation system which concerns on this embodiment.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments for carrying out the invention will be described with reference to the drawings. The following embodiments do not limit the invention according to each claim, and all combinations of features described in the embodiments are not necessarily essential to the solution means of the invention. .

  FIG. 1 is a schematic diagram of a vehicle provided with a vehicle interior noise evaluation system according to the present embodiment, FIG. 2 is a schematic diagram of the vehicle interior noise evaluation system according to the present embodiment, and FIG. It is a flowchart of the data processing of the in-vehicle noise evaluation system which concerns.

  As shown in FIGS. 1 and 2, the vehicle interior noise evaluation system 10 according to this embodiment includes a sensor unit 14 placed on the floor surface 8 of the vehicle 1 and a second measurement installed in the internal space of the vehicle 1. Means 15 are provided. The vehicle 1 includes a bogie frame 5 that supports the vehicle 1 via an air spring 7 and a wheel shaft that is rotatably attached to the bogie frame 5 via a shaft spring 6, and rotates to the left and right of the wheel shaft. The wheel 4 is attached in a fixed state. The wheel 4 travels on the rail 3 laid on the raceway surface 2. The rail wavy wear means that the rail 3 is periodically worn or damaged by the action of the vehicle 1 that repeatedly travels on the rail 3 to form periodic and fine irregularities on the rolling surface of the wheel 4 of the rail 3. The phenomenon that is done.

  The sensor unit 14 includes a first measuring unit 11 and an acceleration sensor / gyro sensor 13, and the first measuring unit 11 is stored in a storage box 12 that is open only on the lower surface. For the first measuring means 11 and the second measuring means 15, microphones are preferably used, and for example, a normal sound level meter, a precision sound level meter and other condenser type microphones can be used.

  In addition, since the 1st measurement means 11 is installed in the floor surface 8 of the vehicle 1, the floor surface noise N1 resulting from the contact with the rail 3 and the wheel 4 is measured. Further, since the first measuring means 11 is stored in the storage box 12 that is open only on the lower surface, the first measuring means 11 is configured to efficiently measure the floor noise N1 while eliminating the influence of the vehicle interior noise N2. ing.

  The storage box 12 may have any configuration as long as it can prevent the influence of the vehicle interior noise N2. For example, the storage box 12 is configured by attaching a sound absorbing material to the inner surface of a box made of metal such as aluminum or duralumin, synthetic resin, or wood. It is preferable. On the other hand, since the 2nd measurement means 15 is arrange | positioned in the inside of the vehicle 1 of the vehicle 1, it is comprised so that the vehicle interior noise N2 can be measured appropriately.

  The acceleration sensor / gyro sensor 13 is used for vibration management and curve detection of the vehicle 1, and the acceleration sensor is, for example, a resistance wire type, a servo type, a piezoelectric type, and a MEMS type, and the gyro sensor is, for example, a mechanical type Fluid type, optical type, quantum type, MEMS type and the like are preferably used.

  In addition, the vehicle interior noise evaluation system 10 according to the present embodiment includes a GPS receiver 16 as a speed detection unit, a speed detection auxiliary unit, and a position detection unit in addition to the sensor unit 14 and the second measurement unit 15 described above. A marker switch 17 and a data recording / processing unit 18 are provided. The GPS receiver 16 is used to detect the traveling speed of the vehicle 1, and the marker switch 17 is used to specify the current position of the vehicle 1. Further, the data recording / processing unit 18 constituting the information processing means includes a recording device for recording measurement data, a CPU (Central Processing Unit) for executing a processing program for the recorded data, and a ROM (Read) for storing the processing program. And an RAM (Random Access Memory) that temporarily stores data necessary for CPU processing. The speed detecting means can be configured to calculate the speed data in post-processing by inputting a speed generator pulse or a device for converting the speed generator pulse into speed data or the speed generator pulse itself in addition to the GPS receiver. is there. In addition to the marker switch, the auxiliary means for speed detection can obtain the average speed during the period if the marker is periodically input with a 100 m-distance marker built on the track. Detection may be performed, and the position detection means may use curve detection by a gyro.

  Next, the operation of the vehicle interior noise evaluation system 10 for executing the vehicle interior noise evaluation method according to the present embodiment will be described. As shown in FIG. 3, floor noise data is generated from the measurement result of the floor noise N1 measured by the first measuring means 11 (S101). Since the floor noise data measured here is time-sampled data on the time axis, it is converted into spatial sampling data of distance sampling (S102). Next, position correction with respect to the ground is performed (S103). More specifically, the marker switch 17 marks the kilometer mark installed on the ground at intervals of about 1 km, thereby giving the kilometer data used in the track maintenance work to the data on the space axis. Next, the spatial axis data is subjected to bandpass filter processing on the spatial frequency axis by the wavy wear detection filter (S104), and only the frequency component resulting from the wavy wear is extracted (S104). Next, the corrugated wear is evaluated by evaluating the rail corrugated wear data with the section statistics represented by the standard deviation (S105), and the section in which the rail corrugated wear occurs is determined. In addition, since a well-known technique can be applied to the evaluation method of wavy wear, detailed description is omitted here.

  Next, the interior comfort is evaluated. In the vehicle interior noise evaluation system 10 according to the present embodiment, vehicle interior comfort is evaluated using vehicle interior noise N2 having a high correlation with vehicle interior comfort. Specifically, in-vehicle noise data is generated from the measurement result of the in-vehicle noise N2 measured by the second measuring means 15 (S106). In-vehicle comfort is evaluated based on the in-vehicle noise data (S107). Various evaluation methods can be adopted for the evaluation of the in-vehicle comfort. For example, it is preferable to evaluate the in-vehicle comfort using an unpleasant degree indicating passenger discomfort with respect to in-vehicle noise. Moreover, you may evaluate vehicle interior comfort using a normal noise level. After that, as in the case of the floor noise N1, the time axis is converted to the space axis (S108), the position is corrected with respect to the ground (S109), and about a kilometer is given.

  The discomfort level can be calculated based on five variables, which are indicators of sound quality of in-vehicle noise, such as loudness (dB), sharpness (acum), tonality (tu), roughness (asper), and fluctuation intensity (vacil). As a regression equation including these variables, the degree of discomfort = A × loudness + B × sharpness + C × tourality + D × roughness + E × variation intensity + F (variable). When the discomfort level calculated by this regression equation exceeds a predetermined threshold value, it is determined that the in-vehicle comfort is reduced. Moreover, it becomes possible to confirm the improvement effect of in-vehicle comfort by comparing with the measurement result after the rail maintenance work.

  In addition, since the vehicle interior noise evaluation system 10 according to the present embodiment includes a gyro sensor, it is possible to check the curve and perform matching with the absolute position on the ground and correct the position.

  Furthermore, if the index determined based on the vehicle interior noise evaluation system 10 according to the present embodiment is used, rail corrugated wear that affects vehicle interior noise can be identified. During rail maintenance work, it is possible to select a section that has a high effect of improving in-vehicle comfort, or to construct the in-vehicle comfort itself as an evaluation index.

  In FIG. 3, the generation of floor noise data and the generation of in-vehicle noise data have been described in series. However, the generation of floor noise data and the generation of in-vehicle noise data are evaluated in parallel with each other. It doesn't matter.

  It should be noted that the present invention is not limited to the above-described embodiment, and it is apparent from the description of the claims that the above-described embodiment can be changed or improved without departing from the spirit of the invention. .

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Track surface 3 Rail 4 Wheel 5 Bogie frame 6 Axle spring 7 Air spring 8 Floor surface 10 Car interior noise evaluation system 11 First measurement means 12 Storage box 13 Acceleration sensor / gyro sensor 14 Sensor part 15 Second measurement means 16 GPS receiver 17 Marker switch 18 Data recording / processing section N1 Floor noise N2 Car interior noise

Claims (7)

A vehicle interior noise evaluation method for a vehicle traveling on a track,
Generating floor noise data on the floor surface of the vehicle by first measuring means installed on the floor surface of the vehicle;
Generating in-vehicle noise data in the vehicle by a second measuring means installed in the vehicle;
Using the floor noise data to determine the occurrence section of the rail wavy wear of the track,
A vehicle interior noise evaluation method, wherein the vehicle interior noise data is used to evaluate vehicle interior comfort associated with the rail corrugated wear. The vehicle interior noise evaluation method according to claim 1,
The vehicle interior noise evaluation method, wherein the first measuring means is stored in a storage box. The vehicle interior noise evaluation method according to claim 2,
The vehicle interior noise evaluation method, wherein the storage box is opened only on a lower surface. A vehicle interior noise evaluation system for a vehicle traveling on a track,
First measurement means for generating floor noise data on the floor surface in the vehicle;
Second measuring means for generating in-vehicle noise data in the vehicle;
An in-vehicle noise evaluation system comprising: information processing means for determining an occurrence section of rail corrugated wear on the track and evaluating in-vehicle comfort using the floor noise data and the in-vehicle noise data. In the vehicle interior noise evaluation system according to claim 4,
The first measuring means is stored in a storage box,
The vehicle interior noise evaluation system, wherein the storage box is placed on the floor surface. In the vehicle interior noise evaluation system according to claim 4 or 5,
The vehicle interior noise evaluation system, wherein the second measuring means is installed in the vehicle.   A rail maintenance method, comprising: maintaining rail wavy wear based on an index determined using the in-vehicle noise evaluation system according to any one of claims 4 to 6.

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