JPH0439009B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides track management using one or two connected two-bogie vehicles similar to commercial vehicles that have a track record of high-speed running. By making it possible to measure track deviations with arbitrary wavelength characteristics, it is possible to eliminate the cost of manufacturing expensive special vehicles as track inspection vehicles, and to detect track deviations with high precision while traveling at high speeds. This relates to a method for measuring orbital deviations that can be measured.

[Conventional technology]

Conventional high-speed track test vehicles have three bogies in one vehicle, and the rigidity of the vehicle body has been increased to measure the height deviation and running deviation of the track using the center deviation of a string of a specific length (masaya method). Because it required a special vehicle with a 300-degree diameter, it became expensive, and at the same time, there were still running safety issues that needed to be resolved in order to improve speed in the future. On the other hand, in order to measure track deviations with arbitrary wavelength characteristics, including the long wavelength range according to the wavelength characteristics required by high-speed railways, using the Masaya method, the measurement string length should be increased.
In addition, it is necessary to perform processing such as measuring at various measured chord lengths and adding the results.To do this, a special vehicle with a long body and high rigidity that can perform masaya measurements of various measured chord lengths is required. It was difficult to construct it as a high-speed vehicle in addition to the cost.

On the other hand, in the case of the so-called inertial measurement method, which integrates the axle box acceleration twice and calculates the displacement with respect to the inertial space, this method is used unless the running speed exceeds a certain level in order to obtain the required accuracy for detecting track deviation. I couldn't do it.

[Purpose of the invention]

The present invention does not have the problems of the conventional track test vehicle mentioned above, that is, the vehicle price is low, and the 300 km /
It is an object of the present invention to provide a method for determining track deviations that does not cause safety problems during high-speed running such as in the h region, and that can accurately measure track deviations having arbitrary wavelength characteristics.

[Means to solve the problems] Among the problems related to the track test vehicle mentioned above, 3
We have stopped using the conventional track test vehicle with a special structure, which has a bogie type with a specially increased rigidity of the car body, and still has issues with running safety when running at high speeds, and has replaced the two-bogie type with one vehicle. Install a total of 4 measurement points, 2 on each trolley, or
Alternatively, a total of 4 measurement points are established, one for each bogie of a two-bogie type vehicle with two cars connected, and these four
By configuring two types of eccentric arrows using three measurement points each, it is possible to measure long string lengths using a vehicle that is similar to or has the same structure as a commercial vehicle that has a sufficient track record of high-speed running. In order to measure the two types of eccentric arrow data that the vehicle has, and to obtain orbit deviations according to the wavelength characteristics required for track management, these two types of eccentric arrow data are added while shifting their positions as the vehicle travels. By obtaining measurement data with a linear phase and no phase distortion of the waveform, and by performing digital filter processing on this data according to the required wavelength characteristics, it is possible to obtain orbit deviations with arbitrary wavelength characteristics and no waveform distortion. made possible.

[Embodiments of the invention]

Figure 1 shows the measurement principle of a track test vehicle consisting of one two-carriage vehicle. The vehicle body 1 is supported by running wheels 2 and moves on rails 3 in the direction of the arrow. The trolley 4 is provided with four displacement measuring devices 5 that continuously measure the vertical or horizontal displacement of the rail while traveling. When measuring the orbital deviation at the position A, use the displacement measuring devices 5-1, 5- at the position a in Fig. 1.
Using the measurement data of 2 and 5-4, the eccentric arrow 7 shown in FIG. Next, using the measurement data of the displacement measuring devices 5-1, 5-3, and 5-4 when the vehicle advances and reaches the position shown in FIG. Calculate the eccentric arrow 8 shown in Figure 1c. When these two eccentric arrows 7 and 8 are added, 5-1 in Fig. 1b, 5-1 in Fig. 1a, 5-2 in Fig. 1a or 5-3 in Fig. 1b, 1 5-4 in Figure b, 5- in Figure 1 a
Data is obtained by adding weights to the measurement data of the five measurement points of 4, which are arranged symmetrically with respect to position A, and this includes orbit deviations in the long wavelength region.
In addition, orbit deviation can be measured with linear phase and no phase distortion.

Further, in order to detect an orbit deviation according to the wavelength characteristics required for orbit management, the necessary orbit deviation can be calculated by digital filter processing according to the wavelength characteristics on this data.

For example, the current two-bogie system with a bogie spacing of 17.5 m and a center-to-bogie center distance of 2.5 m can detect track deviations with certain detection characteristics in the wavelength range of 6 to 80 m, which is necessary for track management of high-speed railways such as the Shinkansen. When measuring on a vehicle with the same structure as a commercial Shinkansen vehicle, the data obtained using the method shown in Figure 1 is subjected to digital filter calculations with the spatial frequency characteristics shown in Figure 2. , it is possible to detect orbit deviations that have the required wavelength characteristics and no phase distortion.

If it is necessary to install a detector between the wheels and it is difficult to install two measurement points on one vehicle, such as in the case of a misalignment, a two-carriage vehicle with two connected vehicles may be used. Measurement is performed according to the principle shown in Figure 3.

Each of the two-car connected bogies 4 is provided with four displacement measuring devices 5 that continuously measure the vertical or horizontal displacement of the rail during running. When measuring the orbit deviation at the position B, the eccentric arrow is calculated using the measurement data of the displacement measuring devices 5-1, 5-2, and 5-4 at the position shown in FIG. 3a. When using a two-car connected vehicle, a reference line 6 is provided in each vehicle, and the eccentric arrow is determined by correcting the relative displacement and intersection angle of these reference lines between the vehicles. Next, the displacement measuring device 5 when the vehicle advances and reaches the position shown in FIG.
- Using the measurement data of 1, 5-3, 5-4, the third
The eccentric arrow is calculated by performing the same correction as in the case of Figure a. By adding these two eccentricity arrows, it is possible to measure track deviation that includes a longer wavelength component and has a linear phase and no phase distortion, using the same principle as the one-vehicle measurement. Digital filter processing for detecting track deviations according to wavelength characteristics required for track management is the same as the processing for measurements by one vehicle.

It goes without saying that the measurement method described above can be performed using the same principle even if the number of connected vehicles and the number of displacement measurement points are increased.

〔Effect of the invention〕

As explained above, according to the method according to the present invention, instead of using a track test vehicle with a special structure as mentioned at the beginning, the vehicle price is low, there is no problem with safety when running at high speed, and it is the same as a commercial vehicle. Since it is possible to measure track deviations including long wavelength range using a structured vehicle, and detect track deviations with arbitrary wavelength characteristics with high accuracy, it is suitable for track test vehicles used for track management of ultra-high-speed railways that further improve the speed of Shinkansen trains. , Only by using this method can the detection of the orbit deviation become possible.

[Brief explanation of drawings]

Figure 1 is an explanatory diagram of the measurement principle when measuring using one two-carriage vehicle, and Figure 2 is an example of filter characteristics when digital filter processing is performed using data measured using the method shown in Figure 1. , FIG. 3 is an explanatory diagram of the measurement principle when measuring using a two-bogie type vehicle with two cars connected. 1... Vehicle body, 2... Wheels, 3... Rail, 4...
...Bogie, 5... Vertical or left/right rail displacement measuring device, 6... Reference line for eccentric arrow, 7, 8... Eccentric arrow.

Claims (1)

[Claims] 1. Install track deviation measurement points at four locations, two on each of the two bogies of a two-bogie type vehicle, or one location on each bogie of a two-car connected vehicle. Four measurement points for track deviations are set up, and three of these four measurement points are used to construct two types of eccentric arrows with long measurement string lengths, and the measurement points are used to measure track deviations in the upper and lower or left and right directions of the rail. Measure the eccentric arrow data, shift the positions of these two eccentric arrow data as the vehicle advances, and add them.Furthermore, perform digital filter processing according to the required wavelength characteristics to obtain arbitrary wavelength characteristics including the long wavelength region. A method for measuring orbital deviation, characterized in that it enables detection of orbital deviation.