JP2533736Y2 - Train position detection device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a train position detecting device for detecting the position of a running train.

[0002]

2. Description of the Related Art In recent years, as train speeds have increased, it has become necessary to correctly grasp the position of the train and operate it. 2. Description of the Related Art Conventionally, a speed generator is provided on a driving wheel of a locomotive, and control is performed by converting rotation of the driving wheel into a train speed. The speed depends on the number of revolutions of the speed generator, and the travel distance can be obtained in the same manner.

[0003]

[Problems to be solved by the invention] However, when trying to obtain the distance by using a speed generator provided for the driving wheel,
In reality, the error increases. In other words, the diameter of the driving wheel is gradually reduced over many years of use, and it is not easy to grasp this accurately. Even if the diameter of the driving wheel is measured with considerable accuracy, the error will accumulate over a long distance. And cannot be ignored. In addition, since the driving wheel idles or slides during acceleration / deceleration, there is a state in which the actual running distance does not match.

[0004] The present invention solves the problem that arises when the train's own position is detected by using such a conventional speed generator provided on a driving wheel, and corrects the error to know the own position accurately. It is an object of the present invention to provide a train position detecting device that can perform the operation.

[0005]

The gist of the present invention to achieve this object is as follows: 1. A train position detecting device for detecting the position of a running train in a train, a ground detecting unit and a distance A point detector having a detection unit, a train position detector connected to the point detector and outputting position information to the navigation unit, and a ground detector of the point detector faces the ground child A vehicle arm, a constant-oscillation oscillator that oscillates at a resonance frequency when the vehicle arm is connected to the ground arm and the vehicle arm is connected to the vehicle arm, and the distance detector of the point detector includes a locomotive. The train position detector has a waveform conversion unit that converts a frequency generated by the speed generator mounted on the driving wheel into a pulse, and the train position detector includes a processing unit including a distance calculation unit, a distance correction unit, and an error correction unit. , The distance calculation unit includes the point detector The distance detection unit counts the pulses, and accumulates the travel distance based on the relationship between the pulse and a predetermined wheel diameter, and the distance correction unit detects when the ground child detection unit detects a ground child. The starting point of the traveling distance is reset based on the position of the ground child known in advance, and the error correction unit corrects the traveling distance by detecting the idling and sliding of the driving wheel, and corrects the traveling distance. A fuzzy set storage unit for storing a set, a constant speed range fuzzy set, and an acceleration range fuzzy set, and applying a current speed and a speed after a short time at the time of acceleration / deceleration to the fuzzy set to synthesize and perform slip and gliding. A fuzzy inference unit for inferring, wherein the fuzzy inference unit predicts a speed when acceleration / deceleration is performed one second after the current speed during traveling, and then reduces the speed from the predicted speed. A fuzzy set of the speed range, constant speed range, and acceleration range is created, and the speed after one second is obtained. The speed is used as a membership function to decelerate range fuzzy set, constant speed range fuzzy set, and acceleration range fuzzy set. Then, the degree of conformity of each rule of the function value is obtained, and the respective degrees of conformity are superimposed and synthesized to obtain an inference result. , Idling
A train position detecting device for obtaining a predicted speed of acceleration / deceleration from a speed before the occurrence of a gliding and outputting correction information so as to wait for the recovery of the slip / sliding.

(2) The error correction unit represents a running state corresponding to a condition in which fuzzy inference is difficult to be satisfied when an appropriate fuzzy set cannot be formed when a long-time slip or gliding occurs or depending on the state of mitigation control. 2. The train position detecting device according to claim 1, further comprising a crisp set storage unit for storing the crisp set.

[0007]

The train position detecting device detects the position of the running train every moment in the running train. In the ground detector of the point detector, the vehicle child faces the ground child, and when the vehicle child moving with the train and the ground child fixed on the ground intersect, both are electromagnetically coupled. When the vehicle armature and the ground armature are combined, the oscillator of the oscillation stop type always operates and oscillates at the resonance frequency, whereby the train detects the ground armature.

In the distance detecting section, the frequency converting section converts the frequency generated by the speed generator mounted on the driving wheel of the locomotive into a pulse in a waveform converting section. In the train position detector, in the processing unit,
The distance calculation unit counts the pulses of the distance detection unit, and integrates the travel distance based on the relationship between the pulses and a predetermined wheel diameter. Speed can also be determined.

Since the position of the ground child is accurately known in advance when the ground child detecting unit detects the ground child, the distance correction unit sets the distance to the ground child as the starting point of the traveling distance and calculates the distance in the distance calculation unit. Reset the total distance. In addition, the error correction unit constantly detects the idling and sliding of the driving wheel to correct the traveling distance.

A fuzzy logic is effective for the error correcting unit, and the fuzzy inference unit stores the current speed and the speed after a short period of time during acceleration / deceleration in the fuzzy set storage unit corresponding to the current state. It applies to the range fuzzy set, the constant speed range fuzzy set, and the acceleration range fuzzy set, and infers slip and gliding by combining the sets to output error correction information.

Further, in the error correction section, when a condition that makes it difficult for fuzzy inference to be satisfied, such as slipping or long running, occurs, the crisp set representing the running state in the crisp set storage section is applied to obtain the error correction information. Output.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Each figure shows an embodiment of the present invention.

As shown in FIG. 1, a train position detecting device 10
Is for detecting the position of a running train while the train is running, and includes a point detector 20 and a train position detector 50 for outputting position information to the navigation unit 15. On the ground, a ground child G set at a predetermined section distance is installed. The point detector 20 includes a ground detector 30.
And a distance detection unit 40. Then, the ground child detecting unit 30 of the point detector 20 detects the vehicle child 3 facing the ground child G.
1, an on-board oscillator 31 is connected, and when the on-board arm 31 is coupled to the ground arm G, it includes an always-stopping oscillator 35 oscillating at a resonance frequency, and band-pass filters 36 and 37.

The grounding element G is set to a level 40 or higher of the grounding element G for transmitting, for example, Q when the grounding element G is coupled to the vehicle mounting element 31. It is set to start oscillation at a resonance frequency of 105 to 130 KHz when coupled.

The distance detecting section 40 of the point detector 20 has a waveform converting section 41 for converting a frequency generated by the speed generator TG mounted on the driving wheel of the locomotive into a pulse. The ground detector 30 and the distance detector 40 of the point detector 20 are connected to the next train position detector 50 via the interface I / F.

The train position detector 50 comprises an input / output unit I / O connected to the interface I / F of the point detector 20, a display unit 51, and a processing unit 60. The output of the processing unit 60 is connected to the navigation unit 70.

The processing section 60 counts the pulses of the distance detecting section 40 and integrates the traveling distance based on the relationship between the pulses and a predetermined wheel diameter. 31 is coupled to the ground child G and detected, the distance correction unit 62 resets the starting point of the traveling distance based on the position of the ground child G known in advance, and detects the idling and sliding of the driving wheels to determine the traveling distance. And an error correction unit 63 for correcting.

The error correction unit 63 includes a fuzzy set storage unit 64 for storing a deceleration range fuzzy set A1, a constant speed range fuzzy set A2, and an acceleration range fuzzy set A3 as shown in FIG.
And a fuzzy inference unit 65 for inferring slipping and gliding by applying the current speed and the speed after a short time during acceleration / deceleration to the fuzzy set and combining them.

Further, the error correction section 63 is provided with a crisp set storage section 66 for storing a crisp set representing a running state corresponding to a condition in which fuzzy inference is difficult to be satisfied.

Next, the operation will be described.

The train position detecting device 10 detects the position of the train on a running train every moment, and the position detection information by the train position detecting device 10 is output to the navigation unit 70 and used as the operation information. You.

In a running train, the speed generator TG rotates according to the rotation of the driving wheels, and the speed generator TG outputs a frequency corresponding to the operating speed. In addition, the on-board child 31 is moving together with the train, and the oscillator 35 of the oscillation-stopping type is always on standby when the on-board child 31 is connected to the ground child G so that it can oscillate at any time.

That is, in the ground child detecting unit 30 of the point detector 20, the vehicle child 31 faces the ground child G, and the vehicle child 31 moving with the train intersects with the ground child G fixed on the ground. At this time, the two are electromagnetically coupled, and when the vehicle upper child 31 and the ground child G are coupled, the oscillation stop type oscillator 35 always operates and oscillates at the resonance frequency.

The oscillation output of the oscillator 35 passes through one of the band-pass filters 36 and 37, and passes through the interface I / F.
Is transmitted to the train position detector 50 via the. Thus, the ground position G can be detected by the train position detector 50 of the train.

At the same time, the distance detector 40 of the point detector 20
In the above, in the waveform converter 41, the frequency generated by the speed generator TG in accordance with the rotation speed of the driving wheel of the locomotive is converted into a pulse, and the pulse output is also transmitted to the train position detector 50 via the interface I / F. Have been.

In the train position detector 50 which receives the outputs of the ground detector 30 and the distance detector 40 of the point detector 20, the processor 60 of the processing unit 60 calculates the distance of the distance detector 40.
Are counted, and the running distance is integrated by multiplying the pulse by a coefficient corresponding to a predetermined wheel diameter. The speed can also be obtained by adding the time factor.

The accumulated distance indicates the position information of the train, and the navigation unit 70 operates the train using the position information.

Regardless of how precisely the running wheel diameter is measured, an error is unavoidable during long distance running.
The starting point of the integrated distance is reset by the distance correction unit 62 using the ground child G.

That is, when the ground child detecting unit 30 detects the ground child G, since the position of the ground child G is accurately known in advance, the distance correction unit 62 determines the distance to the ground child G as the starting point of the traveling distance. , The integrated distance in the distance calculation unit 61 is reset.

Further, the error correcting unit 63 performs the following operations:
The running distance is constantly corrected by detecting the run. The fuzzy logic is effective for the error correction unit 63, and the fuzzy inference unit 65 stores the current speed and the speed after a short period of time during acceleration / deceleration in the fuzzy set storage unit 64 and corresponds to the deceleration corresponding to the state at that time. It is applied to the range fuzzy set A1, the constant speed range fuzzy set A2, and the acceleration range fuzzy set A3, and the respective sets are combined to infer slip and gliding to output error correction information.

Hereinafter, the method of inference will be described in more detail.

When idling or sliding occurs on the driving wheel, mitigation control is performed on the generated driving wheel.
Therefore, a deceleration area fuzzy set A1, a constant speed area fuzzy set A2, and an acceleration area fuzzy set A3 are formed so that fuzzy rules considering these environmental conditions are obtained. The inference is a forward inference, and the inference expression is performed by an IF THEN type production rule.

Each set is an example at a certain speed, and sets are formed corresponding to the entire range of the operating speed.

The concept of inference is as follows.

From the current speed (60 km / h) during running, 1
Acceleration after 2 seconds (2 km / h / s) / deceleration (4 km / h /
The speed (62 km / h during acceleration and 56 km / h during deceleration) when s) is performed is predicted. Next, FIG.
Fuzzy sets of rules 1 to 3 are created.

Then, the speed (61 km / h) after one second is obtained, and the speed is used as a membership function in Rule 1
-3 are applied to the deceleration area fuzzy set A1, the constant speed area fuzzy set A2, and the acceleration area fuzzy set A3.

Next, the fitness (1 to 0 on the vertical axis) of the function value in each rule is obtained, and the fitness is superimposed and synthesized to obtain an inference result. If the fitness of the inference result is 0, it is determined that the detection speed is idling or sliding.

Then, the fuzzy inference unit 65 calculates the predicted speed of acceleration / deceleration from the speed before the occurrence of the slip / skid, and calculates the predicted speed of the acceleration / deceleration.
Outputs correction information to wait for the run to recover.

By the way, there is a case where an appropriate fuzzy set cannot be formed depending on the occurrence of long-time slip or gliding or the state of the relaxation control. In such a case,
The error correction unit 63 outputs error correction information by applying the crisp set representing the running state in the crisp set storage unit 66.

In addition, when an idling / sliding occurs, an accurate traveling kilometer cannot be obtained. Therefore, the traveling distance is calculated from a normal speed before and after the occurrence of the idling / sliding.

According to the above rules, the detection of the slip / skid and the calculation of the traveling kilometer at the time of occurrence are performed to minimize the traveling error. Simulation results of the fuzzy inference and the application of the crisp set are as shown in FIG.

By dividing the integrated distance into blocks, it is possible to freely enter another main line while accurately grasping the distance. Further, if the starting point set for each ground element by the distance correction unit is divided into blocks, the accuracy is further improved.

[0043]

[Effect of the Invention] According to the train position detecting device of the present invention, it is possible to always accurately detect its own position in a running train, so that the measurement error of the mileage is minimized and various complicated business kilometers are used. Can respond flexibly.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an embodiment of the present invention, in which a train position detecting device is provided on a locomotive of a train.

FIG. 2 is a diagram of various fuzzy sets for fuzzy inference.

FIG. 3 is a diagram showing simulation results of fuzzy inference and application of a crisp set.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Train position detection device 15 ... Navigation part G ... Ground child 20 ... Point detector 30 ... Ground child detection part 31 ... Car child 35 ... Oscillator 40 ... Distance detection part 41 ... Waveform conversion part 50 ... Train position detector 51 Display unit 60 Processing unit 61 Distance calculation unit 62 Distance correction unit 63 Error correction unit 64 Fuzzy set storage unit 65 Fuzzy inference unit 66 Crisp set storage unit 70 Navigation unit

Continuing from the front page (72) Tomoyuki Fujita, creator Tomoyuki Fujita 2-29, Heian-cho, Tsurumi-ku, Yokohama-shi, Kanagawa 1 Inside the Keizo Seisakusho Co., Ltd. (56) References JP-A-54-46066 (JP, A) 50-50907 (JP, A) JP-A-4-161815 (JP, A)

Claims (2)

(57) [Scope of request for utility model registration] 1. A train position detecting device for detecting a position of an operating train, comprising: a point detector having a ground detector and a distance detector;
A train position detector connected to the point detector and outputting position information to a navigation unit, a ground child detecting unit of the point detector, a vehicle child facing the ground child, and the vehicle child Is connected, comprises a constant oscillation stop type oscillator that oscillates at a resonance frequency when the upper armature is coupled to the ground armature, and the distance detector of the point detector is a speed generator mounted on the driving wheel of the locomotive. The train position detector includes a processing unit including a distance calculation unit, a distance correction unit, and an error correction unit. The distance calculation unit includes a waveform conversion unit that converts a generated frequency into a pulse. The pulse of the distance detection unit of the detector is counted, and the running distance is integrated based on a relationship between the pulse and a predetermined wheel diameter.The distance correction unit is configured such that the ground detection unit detects the ground child. When it is detected, The starting point of the running distance is reset based on the position of the grounding element. The error correction unit corrects the running distance by detecting idling and sliding of the driving wheel, and includes a deceleration range fuzzy set, a constant speed range. A fuzzy set storage unit that stores a fuzzy set and an acceleration area fuzzy set, and a fuzzy inference unit that infers slipping and gliding by applying the current speed and the speed after a short time during acceleration / deceleration to the fuzzy set and combining them. The fuzzy inference unit predicts the speed when acceleration / deceleration is performed one second after the current speed during traveling, and then calculates the deceleration range, the constant speed range, and the acceleration range from the predicted speed. A fuzzy set is created, the speed after one second is obtained, and the speed is applied to a deceleration range fuzzy set, a constant speed range fuzzy set, and an acceleration range fuzzy set as a membership function. The degree of conformity in each rule is obtained, and the respective degrees of conformity are superimposed and synthesized to obtain an inference result. If the degree of conformity of the inference result is 0, the detection speed is determined to be idling or a sliding state. A train position detecting device for obtaining a predicted speed of acceleration / deceleration from a speed and outputting correction information so as to wait for recovery of slip / slide. 2. An error correction unit according to claim 1, wherein a running state corresponding to a condition in which fuzzy inference is difficult to be applied when an appropriate fuzzy set cannot be formed when a long time slip or gliding occurs or depending on a state of mitigation control. 2. The train position detecting device according to claim 1, further comprising a crisp set storage unit for storing the crisp set represented.