JPH0970107A - ATS speed check device - Google Patents

Abstract

(57) [Summary] [Purpose] To eliminate the flicker of the train speedometer display when outputting the speed signal to the train speedometer, and to contribute to safer driving. [Configuration] The coasting operation determination processing means 17 is a processing means 1
Acceleration / deceleration calculation is performed based on the calculated speed value from 4, and if the acceleration / deceleration is less than a certain value, it is determined whether the train is coasting. Speed change determination processing means 1
When outputting the speed signal to the train speedometer by the speed signal output means 16, the reference numeral 8 indicates the speed at the coasting operation start time when the coasting operation is in progress and the subsequent speed change is equal to or less than a certain value. The flicker of the train speedometer display is eliminated by outputting the calculated speed to the train speedometer if the speed change exceeds a certain value.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ATS speed check device which is an on-board facility in an automatic train stop device (ATS) for safe train operation.

[0002]

2. Description of the Related Art In a conventional ATS speed checking device, a speed signal input means generates a voltage signal corresponding to an input from a compensator, and a speed limit signal input means responds to a speed limit input. A voltage signal corresponding to the speed is generated, and the two voltage signals are compared to perform speed check. When the train speed exceeds the speed limit, a brake signal is output.

However, in such a configuration, since the speed signal output from the compensator is input to the ATS speed checking device, it is converted into a signal suitable for processing in speed checking by the speed signal input means. There is an error with the speed signal output from the compensator directly to the train speedometer,
Since this error is added to cause a difference between the display speed and the checking speed, in the running state approaching the speed limit, the speed displayed on the train speedometer is within the speed limit,
The ATS speed checking device may output a brake signal by measuring that the train speed exceeds the speed limit.
There was a problem that it was difficult to drive close to the speed limit.

In order to solve such a problem, the applicant of the present application has disclosed in Japanese Unexamined Patent Publication No. Hei 7-67203 that the speed of a train approaches the running speed approaching the speed limit or the same speed as the speed limit. We proposed an ATS speed checking device that can suppress the output of a brake signal as long as the speed displayed on the meter does not exceed the speed limit.

This prior invention will be described below with reference to the drawings. FIG. 10 shows the structure of the above-mentioned prior invention. In FIG. 10, 101 is a signal input means,
Receives the signal from the speed generator. 102 is a wheel diameter setting means, which is set according to the wheel diameter of the train. 103 is a speed limit signal input means for receiving a speed limit signal, 104 is a processing means for speed calculation and speed checking, 105 is a brake signal output means for outputting a brake signal, and 106 is a speed signal output means for outputting a train speed signal. is there.

Next, the operation of the above prior invention will be described. In FIG. 10, a signal input unit 101 receives a signal from a speed generator, shapes the waveform, and inputs it to a processing unit 104 as a speed pulse signal. Wheel diameter setting means 102
Receives a signal set according to the wheel diameter of the train and inputs it to the processing means 104. Speed limit signal input means 103
Receives the speed limit signal and inputs it to the processing means 104.
The processing means 104 receives these signals and performs speed calculation and speed check, the brake signal output means 105 outputs the brake signal, and the speed signal output means 106 outputs the train speed.

The processing means 104 calculates the interval time T of the speed pulse signal from the signal input means 101 by the internal high speed clock, and the wheel diameter D from the wheel diameter setting means 102.
Based on the above, the train speed V is calculated as follows.

First, when two speed pulses are counted with a high-speed clock signal of 100 kHz, the interval time T is calculated by the following equation, where N is the number of counts. T (s) = 0.00001 × N (1) Since a certain number P of speed pulses are generated during one rotation of the wheels of the train, the distance L advanced in T time can be obtained by the following equation. L (m) = D (m) × π ÷ P (2) Train speed V is calculated from T and L by the following equation. V (m / s) = L (m) ÷ T (s) (3) The train speed V (km / h) is obtained from the equation (3) by the following equation. V (km / h) = 3.6 × L (m) ÷ T (s) (4)

The processing means 104 outputs the value of the speed V calculated by the equation (4) to the speed signal output means 106. The processing means 104 also compares the speed V calculated by the equation (4) with the speed VS corresponding to the speed limit signal from the speed limit signal input means 3, and when V> VS, outputs the brake signal to the brake signal output means. Output to 105. In response to the results of these processes, the brake signal output means 105 outputs a brake signal to the brake device, and the speed signal output means 1
06 outputs a train speed signal to the train speedometer.

FIG. 11 shows the speed signal output means 10 at this time.
When the speed data is received from the processing means 104 (step 111), the speed data is directly output to the train speed meter (step 112).

[0011]

However, in the above-mentioned prior invention, even though the train is running at a constant speed during coasting operation, it is caused by the misalignment between the rotating shaft of the speed generator and the axle of the train. There has been a problem that the speed display of the train digital speedometer flickers due to fluctuations in the calculated speed value caused by frequency fluctuations of the speed generator. FIG.
Fig. 1 shows an example of speed output during operation at a constant speed during coasting operation in the conventional example. As shown in FIG. 12, the speed output signal is rounded up to the nearest whole number of three digits, and even a slight change in the value below the decimal point results in 100 → 9.
Since the speed output of 9 → 100 → 99 is repeated in a cycle within 1 second, the speed display of the digital speedometer flickers. Train drivers often coast over while driving and look at the speedometer at that time, thus visually observing this unwanted display flicker.

The present invention solves the above-mentioned problems of the prior invention. When a speed signal is output to a train speedometer, the calculated speed is less than a decimal point due to frequency fluctuations of the speed generator. It is an object of the present invention to provide an excellent ATS speed checking device capable of eliminating the flicker of a train speedometer display caused by a slight change in the value of.

[0013]

In order to achieve the above object, the present invention provides a signal input means for receiving a signal from a speed generator, a wheel diameter setting means, and a speed limit signal input means.
The processing means for speed calculation and speed check, the coasting operation determination processing means for determining whether the train is coasting, and the speed signal output contents are switched according to the speed change amount after the coasting operation determination. Speed change determination processing means, brake signal output means, and a speed signal output means for outputting a speed signal to the train speedometer, train speed is calculated based on the signal from the speed generator, train When outputting a speed signal to the speedometer, if coasting is in progress,
If the speed change thereafter is less than a certain value, the speed at the start of coasting operation is output to the train speedometer, and if the speed change exceeds a certain value, the calculated speed is output to the train speedometer. .

The present invention also has coasting operation start speed signal output means instead of the speed change determination processing means described above,
When outputting a speed signal to the train speedometer, when the coasting operation is in progress, the speed at the start of the coasting operation is output to the train speedometer.

The present invention also has a speed output interval time N times processing means instead of the speed change determination processing means described above,
When outputting the speed signal to the train speedometer, the output interval time is set to N times the normal time when the coasting operation is in progress.

[0016]

Therefore, according to the present invention, when the speed signal is output to the train speedometer, when the coasting operation is in progress, if the subsequent speed change is less than a certain value, the speed at the coasting operation start time is set to the train speed. It outputs to the speedometer and outputs the calculated speed to the train speedometer if the speed change exceeds a certain value, or outputs the speed at the start of coasting operation to the train speedometer when coasting. Therefore, or during the coasting operation, by making the output interval time N times the normal time, it is possible to eliminate the flicker of the train speedometer display and contribute to safer running.

[0017]

【Example】

(Embodiment 1) FIG. 1 is a block diagram showing the configuration of the first embodiment of the present invention. In FIG. 1, 21 is a signal input means for receiving a signal from a speed generator, 12 is a wheel diameter setting means, 13 is a speed limit signal input means, 14 is processing means for speed calculation and speed checking, and 15 is a brake. Signal output means, 16 is a speed signal output means, 17 is a coasting operation determination processing means, and 18 is a speed change determination processing means.

Next, the operation of the first embodiment will be described. In FIG. 1, the signal input means 11 receives the signal from the speed generator, shapes the waveform, and inputs it to the processing means 14 as a speed pulse signal. The wheel diameter setting means 12 receives the signal set according to the wheel diameter of the train and inputs it to the processing means 14. The speed limit signal input means 13 receives the speed limit signal and inputs it to the processing means 14. Processing means 14
Receives these signals, performs speed calculation and speed checking, outputs the calculated train speed V value to the coasting operation determination processing means 17 and the speed change determination processing means 18, and at the same time outputs the speed V and the speed limit signal. The corresponding speed VS is compared, a brake signal is output when V> VS, and the brake signal output means 15 outputs the brake signal to the brake device.

The coasting operation determination processing means 17 performs acceleration / deceleration calculation based on the calculated speed value and determines whether the train is coasting when the acceleration / deceleration is below a certain value. The speed change determination processing means 18 outputs the speed at the coasting operation start time to the train speedometer if the subsequent speed change is less than a certain value, and outputs the calculated speed to the train speedometer if the speed change exceeds a certain value. Output and speed signal output means 16
Outputs the speed signal to the train speedometer.

Next, the processing for outputting the train speed signal will be described with reference to FIG. When the coasting operation determination processing means 17 receives the speed calculation value data from the processing means 14, it compares the previous data with the current data at 1 second intervals (step 21) and calculates acceleration / deceleration (step 21). 22) If the acceleration / deceleration is below a certain value, it is determined that the train is coasting (step 23), and the current data is stored as the speed at the start of coasting (step 24). The speed change determination processing means 18 is the processing means 14.
From the speed calculation value data, and from the coasting operation determination processing means 17 receives the coasting operation determination result and the speed at the coasting operation start time. If the coasting operation is in progress (step 25), the speed data at the coasting operation start time is received. And the current speed data are compared (step 26), and the speed change amount is calculated (step 2
7) If the speed change amount is less than a certain value, the speed at the start of coasting operation is output to the train speedometer, and if the speed change exceeds the certain value, the calculated speed is output to the train speedometer (step). 28, 29, 30).

Here, the constant value of the speed change amount needs to be larger than the fluctuation value of the fluctuation value of the calculated speed value caused by the frequency fluctuation of the speed generator, but this value is ± 0. By setting the speed to 5 km / h, the flicker of the train speedometer display caused by slight fluctuations of the decimal point of the speed calculation value is eliminated, and ± 0.5 km / h or more even when the train is coasting. When there is a speed change, the speed calculation value data can be promptly output to the train speedometer to cope with the speed change.

An example of these operation timings is shown in FIG.
As shown in FIG. 3, during the acceleration / deceleration operation of the train, if the fluctuation value of the calculated speed value caused by the frequency fluctuation of the speed generator is less than a constant value (± 0.5 km / h), coasting operation is performed. The speed at the start is output to the train speedometer to eliminate the flicker of the LED speed display. Even during the coasting operation, when there is a speed change of ± 0.5 km / h or more, the speed calculation value data is promptly output to the train speed meter to cope with the speed change. When the train shifts to the acceleration / deceleration operation, the speed calculation value data is promptly output to the train speedometer to respond to the speed change.

As described above, according to the first embodiment,
Speed calculation and speed verification are performed by the signal input means 11 for receiving a signal from the speed generator, the wheel diameter setting means 12, the speed limit signal input means 13, and the processing means 14.
The coasting operation determination processing means 17 determines whether the train is coasting or not, and the speed change determination processing means 18 switches the content of the speed signal output according to the speed change amount after the coasting operation determination, and the train speedometer is displayed. When outputting the speed signal, when the coasting operation is in progress, the speed at the start of the coasting operation is output to the train speedometer if the speed change thereafter is less than a certain value, and the speed change exceeds the certain value. For example, by outputting the calculated speed to the train speedometer, it is possible to eliminate the flicker of the train speedometer display due to slight fluctuations in the value below the decimal point of the speed calculation value caused by frequency fluctuations of the speed generator. Have.

(Embodiment 2) FIG. 4 is a block diagram showing the configuration of the second embodiment of the present invention. This second embodiment is
The speed change determination processing means 18, which is a component of the first embodiment shown in FIG. 1, is used as a coasting operation start speed signal output means 38. In FIG. 4, 31 is a signal input means for receiving a signal from the speed generator. A wheel diameter setting means 32 is set according to the wheel diameter of the train. 33
Is a speed limit signal input means, 34 is a processing means for speed calculation and speed checking, 35 is a brake signal output means, 36 is a speed signal output means, 37 is a coasting operation determination processing means, 3
Reference numeral 8 is an inertial operation start speed signal output means.

Next, the operation of the second embodiment will be described. In FIG. 4, the signal input means 31 receives a signal from the speed generator, shapes the waveform, and inputs it to the processing means 34 as a speed pulse signal. The wheel diameter setting means 32 receives the signal set according to the wheel diameter of the train and inputs it to the processing means 34. The speed limit signal input means 33 receives the speed limit signal and inputs it to the processing means 34. Processing means 34
Receives these signals, performs speed calculation and speed checking, outputs speed calculation value data to the coasting operation determination processing means 37 and coasting operation start speed signal output means 38, and outputs a brake signal by the brake signal output means 35. Output to the braking device. The coasting operation determination processing means 37 performs acceleration / deceleration calculation based on the calculated speed data, and determines whether the train is coasting when the acceleration / deceleration is equal to or less than a certain value. When the coasting operation is in progress, the coasting operation start speed signal output means 38 outputs the speed at the coasting operation start time, and the speed signal output means 36 outputs the speed signal to the train speedometer.

Next, the processing for outputting the train speed signal will be described with reference to FIG. When the coasting operation determination processing means 37 receives the speed calculation value data from the processing means 34, it compares the previous data with the current data at 1 second intervals (step 41) and calculates acceleration / deceleration (step 41). 42), when the acceleration / deceleration is equal to or less than a certain value, it is determined that the train is coasting (step 43), and the current data is stored as the speed at the start of coasting (step 44). The coasting operation start speed signal output means 38 is
A coasting operation determination result and the speed at the coasting operation start time are received from the coasting operation determination processing means 37, the speed at the coasting operation start time is output when the coasting operation is in progress, and the calculation speed is calculated when the coasting operation is not in progress. Output (steps 45, 46, 4)
7).

An example of these operation timings is shown in FIG.
As shown in FIG. 6, during the acceleration / deceleration operation of the train, the speed calculation value data is output to the train speedometer to respond to the speed change. When the speed calculation value fluctuates due to the frequency fluctuation of the speed generator during coasting operation, the speed at the start of coasting operation is output to the train speed meter to eliminate the flicker of the LED speed display. .

As described above, according to the second embodiment,
The speed calculation and speed checking are performed by the signal input means 31, the wheel diameter setting means 32, the speed limit signal input means 33, and the processing means 34, which receive the signal from the speed generator.
The coasting operation determination processing means 37 determines whether the train is coasting, and the coasting operation start speed signal output means 38 outputs the calculated speed to the train speedometer when the coasting operation is not in progress. It has the advantage that the flicker of the train speedometer display can be eliminated due to slight fluctuations in the value after the decimal point of the speed calculation value caused by frequency fluctuations of the speed generator.

(Embodiment 3) FIG. 7 is a block diagram showing the configuration of the third embodiment of the present invention. This third embodiment is
The speed change determination processing means 18, which is a component of the first embodiment shown in FIG. 2, is replaced with the speed output interval time N times processing means 58. In FIG. 7, 51 is a signal input means for receiving a signal from the speed generator. Reference numeral 52 is a wheel diameter setting means, which is set according to the wheel diameter of the train. 53
Is a speed limit signal input means, 54 is a processing means for speed calculation and speed checking, 55 is a brake signal output means, 56 is a speed signal output means, 57 is a coasting operation determination processing means, 5
Reference numeral 8 is a speed output interval time N times processing means.

Next, the operation of the third embodiment will be described. In FIG. 7, the signal input means 51 receives a signal from the speed generator, shapes the waveform, and inputs it to the processing means 54 as a speed pulse signal. The wheel diameter setting means 52 receives the signal set according to the wheel diameter of the train and inputs it to the processing means 54. The speed limit signal input means 53 receives the speed limit signal and inputs it to the processing means 54. Processing means 54
Receives these signals, performs speed calculation and speed verification, outputs speed calculation value data to the coasting operation determination processing means 57 and speed output interval time N times processing means 58, and outputs a brake signal to the brake signal output means 55. Output to the brake device. The coasting operation determination processing means 57 performs acceleration / deceleration calculation based on the speed calculation value data, and determines whether the train is coasting when the acceleration / deceleration is equal to or less than a certain value. When the coasting operation is in progress, the speed output interval time N times processing unit 58 sets the subsequent speed output interval time to N times and outputs the speed signal to the train speedometer by the speed signal output unit 56.

Next, the processing for outputting the train speed signal will be described with reference to FIG. Upon receiving the speed calculation value data from the processing means 54, the coasting operation determination processing means 57 compares the previous data with the current data at 1-second intervals (step 61) and calculates acceleration / deceleration (step 61). 62), if the acceleration / deceleration is equal to or lower than a certain value, it is determined that the train is coasting (step 63). The speed output interval time N times processing means 58 receives the speed calculation value data from the processing means 54 and the coasting operation determination result from the coasting operation determination processing means 57, and in the coasting operation, the speed output interval. When the time is set to N times and the coasting operation is not being performed, the calculated speed is output to the train speed meter through the speed signal output means 56 at each regular interval time (steps 64 and 65).

FIG. 9 shows an example of these operation timings.
As shown in FIG. 9, during the acceleration / deceleration operation of the train, speed calculation value data is output to the train speedometer at regular interval times (100 ms) to respond to speed changes. During coasting,
Even if the calculated speed value fluctuates due to the frequency fluctuation of the speed generator, the flicker of the LED speed display felt by a person is eliminated by making the speed output interval time N times (1S).

As described above, according to the third embodiment,
The signal input means 51 for receiving a signal from the speed generator, the wheel diameter setting means 52, the speed limit signal input means 53, and the processing means 54 perform speed calculation and speed checking.
When the coasting operation determination processing unit 57 determines whether the train is coasting, and the speed output interval time N times processing unit 58 outputs the calculated speed to the train speedometer, the coasting operation is performed. By setting the subsequent speed output interval time to N times (1S), there is an advantage that the flicker of the train speedometer display felt by a person can be eliminated.

[0034]

As is apparent from the above description, the present invention determines the speed signal by the coasting operation judging means for judging whether the train is coasting or not, and the speed change amount after the judgment during coasting operation. Speed change determination processing means for switching output contents, or coasting operation start speed signal output means,
Alternatively, when outputting the speed signal to the train speedometer by the speed output interval time N times processing means, when the coasting operation is in progress, if the subsequent speed change is less than a certain value, the speed at the coasting operation start time is set to the train. Output to the speedometer, and if the speed change exceeds a certain value, output the calculated speed to the train speedometer,
Alternatively, when the coasting operation is in progress, the speed at the coasting operation start time is output to the train speedometer, or when the coasting operation is in progress, the output interval time is set to N times the normal speed, thereby increasing the train speedometer. It is possible to eliminate the flickering of the display and contribute to safer driving.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of a first embodiment of an ATS speed checking device of the present invention.

FIG. 2 is a flow chart of train speed signal output processing in the first embodiment of the present invention.

FIG. 3 is an operation timing chart of train speed signal output processing in the first embodiment of the present invention.

FIG. 4 is a block diagram showing a configuration of a second exemplary embodiment of the present invention.

FIG. 5 is a flow chart of train speed signal output processing in the second embodiment of the present invention.

FIG. 6 is an operation timing chart of train speed signal output processing in the second embodiment of the present invention.

FIG. 7 is a block diagram showing the configuration of a third embodiment of the present invention.

FIG. 8 is a flow chart of train speed signal output processing in the third embodiment of the present invention.

FIG. 9 is an operation timing chart of train speed signal output processing in the third embodiment of the present invention.

FIG. 10 is a block diagram showing a configuration of a conventional ATS speed checking device.

FIG. 11 is a flowchart of a train speed signal output process of a conventional ATS speed checking device.

FIG. 12 is an operation timing chart of train speed signal output processing of the conventional ATS speed checking device.

[Explanation of symbols]

 11, 31, 51 Signal input means 12, 32, 52 Wheel diameter setting means 13, 33, 53 Speed limit signal input means 14, 34, 54 Processing means 15, 35, 55 Brake signal output means 16, 36, 56 Speed signal Output means 17, 37, 57 coasting operation determination processing means 18 speed determination processing means 38 coasting operation start speed signal output means 58 speed output interval time N times processing means

Claims (3)

[Claims] 1. A signal input means for receiving a signal from a speed generator, a wheel diameter setting means for setting and inputting a wheel diameter, a speed limit signal input means for receiving a speed limit signal, speed calculation and speed checking. A processing means to perform, a coasting operation determination processing means to determine whether the train is coasting, and a speed change determination processing means to switch the speed signal output content according to the speed change amount after the coasting operation determination. , A brake signal output means for outputting a brake signal to the braking device, and a speed signal output means for outputting a speed signal to the train speedometer, and when outputting the speed signal to the train speedometer, when coasting If the speed change after that is less than a certain value, the speed at the start of coasting operation can be output to the train speedometer, and if the speed change exceeds a certain value, the calculated speed can be output to the train speedometer. And an ATS speed checking device. 2. A coasting operation start speed signal output means is provided instead of the speed change determination processing means, and when the coasting operation is in progress, the speed at the coasting operation start time is output to the train speedometer. The ATS speed checking device according to claim 1. 3. A speed output interval time N times processing means is provided in place of the speed change determination processing means, and when outputting a speed signal to a train speedometer, when the coasting operation is in progress, the output interval time is set. The ATS velocity checking device according to claim 1, wherein the ATS speed is set to N times the normal value.