JP2015037329A - Train control apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a train control apparatus capable of significantly enhancing safety of traveling of a train by enabling a reduction in error of train position detection.SOLUTION: A train control apparatus includes: a frequency analysis part 7 that analyzes a frequency of a signal output from a tacho-generator 6 for detecting the rotation amount of an axle of a train 2; an idling and sliding detection part 8 that detects the idling and sliding of a wheel 5 of the train 2 on the basis of the analysis result of the frequency analyzed by the frequency analysis part 7; and a train position detection part 9 that detects a position of the train 2 on the basis of idling and sliding states detected by the idling and sliding detection part 8.

Description

  The present invention relates to a train control device, and more particularly to a train control device that can reduce an error in train position detection and can significantly increase the safety of train travel.

  Conventionally, when detecting the traveling position of a train, a speed generator that generates a pulse corresponding to the rotation of the wheel is often used, and the number of pulses generated by this speed generator is counted to determine the position of the wheel. The position of a train is detected by calculating the amount of rotation.

  However, when detecting the position of a train with such a speed generator, since it is based on the rotation of the wheel, for example, when the wheel slips during acceleration of the train or when the wheel slides during braking of the train However, there is a problem that an error occurs in the position detection of the train, and the accurate train position cannot be detected.

  As a means for detecting such idling or sliding of the conventional wheel, conventionally, for example, a counter that counts the number of pulses of a multi-axis speed generator, a pulse number multiplication counter, and the count value of any one counter A speed conversion processing unit for converting to a sampling rate for a plurality of hours, an acceleration / deceleration calculation unit for calculating an acceleration / deceleration for each of the converted sampling rates, and linear data preliminarily registered for the sampling rate and each acceleration / deceleration for the plurality of hours The generation / completion detection means that detects the occurrence / end of idling / sliding using this, and judging from idling / sliding based on these occurrence / end signals, idling / sliding with a short sampling speed during large idling / sprinting, A technology that provides a judging means to select idling / sliding for each axis by selecting idling / sliding at a long sampling speed during micro idling / sliding Has been disclosed (e.g., see Patent Document 1.).

JP 2004-173399 A

  However, in the prior art, the acceleration / deceleration calculation unit calculates the acceleration / deceleration based on the sampling rate. In order to calculate the speed and the acceleration / deceleration, a certain time of a pulse generated from the speed generator is required. It is considered that the change is detected by performing a moving averaging process, for example. Since the past value is accumulated and the value is calculated by the moving averaging process in this way, there is a delay from when the wheel slipping or sliding occurs and when it is reflected to the speed and acceleration values. Therefore, there is a problem that a detection delay occurs and an error may occur in the train position detection value.

  Therefore, it is difficult to ensure the safety of traveling of the train, and there is a problem that it is difficult to apply to high-density operation of the train.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a train control device that can reduce an error in train position detection and can significantly increase the safety of train travel. Is.

In order to achieve the above object, the train control device according to the invention of claim 1 includes a frequency analysis unit that analyzes a frequency of a signal output from a speed generator that detects a rotation amount of a train axle,
Based on the frequency analysis result by the frequency analysis unit, the idling / sliding detecting unit for detecting idling and sliding of the train wheel,
Idling by the idling and sliding detection unit, a train position detecting unit for detecting the position of the train based on the running state, and
It is characterized by having.

  According to a second aspect of the present invention, in the first aspect, the frequency analysis unit analyzes a signal output from the speed generator by performing a fast Fourier transform process.

  According to a third aspect of the present invention, in the first or second aspect, the idling / sliding detecting unit detects idling when the frequency analyzed by the frequency analyzing unit becomes high, and the frequency becomes low. In this case, it is detected that it is sliding.

  According to the first aspect of the present invention, the frequency analysis unit analyzes the frequency of the speed generator, and the idling / sliding detection unit detects the idling or sliding of the wheel from the change in frequency. The position can be calculated accurately, and the traveling safety of the train can be significantly increased. In addition, by performing moving average processing as in the past, it is possible to detect idling or sliding more quickly than when detecting idling or running of a wheel, and the position of the train can be detected quickly. It is possible to ensure the safety of running the train.

  According to the second aspect of the invention, since the frequency analysis unit analyzes the signal output from the speed generator by performing a fast Fourier transform process, the frequency analysis unit appropriately analyzes the frequency of the speed generator. Can be analyzed.

  According to the invention of claim 3, the idling / sliding detection unit detects idling when the frequency analyzed by the frequency analysis unit becomes high, and detects gliding when the frequency becomes low. Therefore, it is possible to appropriately detect the idling or sliding of the wheel based on the frequency of the speed generator.

It is a schematic structure figure showing an embodiment of a train control device concerning the present invention. It is explanatory drawing which shows the relationship of the idling or sliding based on the frequency of the tachometer generator in embodiment of the train control apparatus which concerns on this invention. It is a flowchart which shows the operation | movement in embodiment of the train control apparatus which concerns on this invention.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a schematic configuration diagram showing an embodiment of a train control device according to the present invention. In this embodiment, a train control device 3 is mounted on a train 2 traveling on a predetermined track 1. . The train control device 3 includes an on-board control unit 4 configured mainly with a CPU, and is configured to perform various controls such as speed control and braking control of the train 2.

  The train control device 3 is connected to an axle (not shown) of a predetermined wheel 5 of the train 2, and is a speed generator that outputs a pulsed output signal as the axle rotates, a so-called tacho generator 6. Is connected.

  Further, in the present embodiment, the train control device 3 includes a frequency analysis unit 7, and the frequency analysis unit 7 is based on a pulse-like output signal proportional to the rotational speed of the wheels 5 from the tacho generator 6. The output signal is subjected to a fast Fourier transform process to analyze the frequency of the tacho generator 6.

  Further, the train control device 3 includes an idling / sliding detecting unit 8, and the idling / sliding detecting unit 8 always monitors the frequency sent from the frequency analyzing unit 7, and when there is a change in the frequency, the wheel 5 It is configured to detect the occurrence of slipping or sliding.

Here, as shown in FIG. 2, the frequency of the tachometer generator 6 changes in proportion to the speed of the train 2 when the wheels 5 of the train 2 are in a sticky state, that is, in a state where the wheels 5 are properly rolling along the rails. I know. And when the wheel 5 of the train 2 idles, it is known that the frequency of the tacho generator 6 shows a higher frequency compared to the case where the wheel 5 is in an adhesive state. It has been found that when sliding, the frequency of the tacho generator 6 shows a lower frequency than when the wheels 5 are in an adhesive state.
Therefore, when the frequency suddenly increases while the idling / sliding detection unit 8 is monitoring the frequency of the tachometer generator 6, it is detected that the wheel 5 of the train 2 is idling, and the frequency is drastically decreased. When it becomes, it is comprised so that it may detect that the wheel 5 of the train 2 slipped.

  Then, as shown in FIG. 2, considering the relationship between the frequency when the wheel 5 is idling with respect to the frequency when the wheel 5 is adhered, and the frequency when the wheel 5 is sliding, with respect to the frequency when the wheel 5 is adhered Detecting that the wheel 5 has slipped when it is about 50% higher, and detecting that the wheel 5 has slipped when it is about 50% lower than the frequency when the wheel 5 is stuck. Thus, it is possible to detect idling or sliding of the wheel 5.

  In addition, the train control device 3 includes a train position detection unit 9, and the train position detection unit 9 is based on an output signal proportional to the rotation speed of the wheels 5 sent from the tacho generator 6. And the current position of the train 2 is detected by correcting the travel distance of the train 2 based on the detection result of the idling or sliding of the wheel 5 sent from the idling / sliding detector 8. Yes. Based on the position of the train 2 detected by the train position detector 9, the on-board controller 4 performs speed control, braking control, and the like of the train 2.

  Next, the operation of the present embodiment will be described with reference to the flowchart shown in FIG.

  First, as the train 2 travels, an output signal is output from the tacho generator 6 as the axle of the wheel 5 rotates (ST1).

  Then, the frequency analysis unit 7 analyzes the frequency of the tacho generator 6 based on the pulsed output signal proportional to the rotational speed of the wheel 5 from the tacho generator 6 (ST2).

  Thereafter, the idling / sliding detection unit 8 monitors the frequency sent from the frequency analysis unit 7 to monitor whether there is a sudden change in the frequency (ST3). And when there is no sudden change of a frequency, it detects that the wheel 5 of the train 2 is an adhesion state.

  On the other hand, when the frequency suddenly increases, it is detected that the wheel 5 of the train 2 has slipped (ST5), and when the frequency suddenly decreases, it is detected that the wheel 5 of the train 2 has slipped. (ST6).

  The train position detection unit 9 calculates the travel distance of the train 2 based on the output signal proportional to the rotation speed of the wheels 5 sent from the tachometer generator 6, and the idling of the wheels 5 sent from the idling sliding detection unit 8. Alternatively, the current position of the train 2 is calculated by correcting the travel distance of the train 2 based on the detection result of the run (ST4).

  As described above, in the present embodiment, the frequency analysis unit 7 analyzes the frequency of the tachometer 6 and the idling / sliding detection unit 8 detects idling or sliding of the wheel 5 from the change in frequency. Therefore, the position of the train 2 can be accurately calculated, and the safety of traveling of the train 2 can be significantly increased.

  In addition, as a frequency resolution, for example, when trying to obtain a frequency with an accuracy of ± 10 Hz, as compared with the case of detecting idling or sliding of the wheel 5 by performing a moving averaging process as in the past. Therefore, it is possible to detect the idling or sliding of the wheel 5 in about half the time, and the position of the train 2 can be detected quickly, so that the traveling safety of the train 2 can be ensured.

  In addition, this invention is not limited to the said embodiment, A various deformation | transformation is possible based on the meaning of this invention.

DESCRIPTION OF SYMBOLS 1 Track 2 Train 3 Train control device 4 On-board control part 5 Wheel 6 Tacho generator 7 Frequency analysis part 8 Idling and sliding detection part 9 Train position detection part

Claims (3)

A frequency analysis unit that analyzes the frequency of the signal output from the speed generator that detects the rotation amount of the train axle;
Based on the frequency analysis result by the frequency analysis unit, the idling / sliding detecting unit for detecting idling and sliding of the train wheel,
Idling by the idling and sliding detection unit, a train position detecting unit for detecting the position of the train based on the running state, and
A train control device comprising:   The train control apparatus according to claim 1, wherein the frequency analysis unit analyzes a signal output from the speed generator by performing a fast Fourier transform process.   The idling / sliding detecting unit detects idling when the frequency analyzed by the frequency analyzing unit is high, and detects skiing when the frequency is low. Item 3. The train control device according to Item 2.

Images