JP3162551B2 - ATS speed checker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ATS speed checking device which is an on-board equipment in an automatic train stop (ATS) for safely operating a train.

[0002]

2. Description of the Related Art FIG. 4 shows the configuration of a conventional ATS speed checking device. In FIG. 4, reference numeral 1 denotes a speed generator attached to a wheel shaft of a train, which is connected to a compensator 2. The output of the compensator 2 is connected to the train speedometer 3 and the ATS speed check device 8. In the ATS speed checking device 8, 4 is a speed signal input means, 5 is a speed limit signal input means, 6 is a speed checking means, and 7 is a brake signal output means.

Next, the operation of the above conventional example will be described.
In FIG. 4, a speed generator 1 outputs a signal having a frequency proportional to the speed, and a signal from the speed generator 1 is input to a compensator 2 where the signal is rectified, smoothed, and corrected by a wheel diameter. And the signal level is corrected to adjust the voltage signal according to the speed.
It is input to the speed checking device 8. The train speedometer 3 receives a signal from the compensator 2 and performs speed display. The ATS speed checking device 8 outputs the signal from the compensator 2 to the speed signal input means 4.
And outputs a voltage corresponding to the speed, and receives a speed limit signal at the speed limit signal input means 5 to generate a voltage signal corresponding to the speed in response to the speed limit signal input. Speed comparison is performed by the speed comparison means 6, and a brake signal is output by the brake signal output means 7.

As described above, in the above-mentioned conventional ATS speed checking device, the speed signal input means 4 generates a voltage signal corresponding to the speed in response to the input from the compensator 2 and the speed limit signal input means 5 Generates a voltage signal corresponding to the speed corresponding to the speed limit input, compares the two voltage signals, performs a speed check, and outputs a brake signal when the train speed exceeds the speed limit. Have been.

[0005]

However, in the above conventional configuration, the speed signal output from the compensator 2 is A
After being input to the TS speed checking device 8, the signal is converted by the speed signal input means 4 into a signal suitable for processing in the speed checking means 6. There is an error between the speeds, and this error is added to create a difference between the displayed speed and the inspection speed.In a running state approaching the speed limit, the speed displayed on the train speedometer may not exceed the speed limit. Regardless, the ATS speed checking device sometimes measures that the train speed has exceeded the speed limit and outputs a brake signal. Further, when the ATS speed checking device fails and is replaced, various constants such as the wheel diameter and the type of the speed generator have to be reset, and there is a possibility that an erroneous setting may occur. Further, when the train speed becomes slower, the time interval of the pulse signal output from the speed generator becomes longer. Therefore, if only one cycle of the pulse signal is to be measured, the number of pulses is insufficient at a high speed, and the measurement is not performed. There was a problem that it could not be performed accurately.

An object of the present invention is to solve such a conventional problem, and an object of the present invention is to provide an ATS speed checking device capable of accurately measuring and checking the speed of a train.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a signal input means for receiving a signal from a speed generator, a train wheel diameter set and stored, and an attachment / detachment to / from a device body. Wheel diameter setting means provided so as to be provided, a speed limit signal input means for receiving a speed limit signal, a brake signal output means for outputting a brake signal, a speed signal output means for outputting a speed signal to a train speedometer, Input means,
The train speed is calculated based on the signals from the wheel diameter setting means and the speed limit signal input means, and the speed signal is output to the speed signal output means, and the speed limit is compared with the train speed. And a processing means for outputting a brake signal when the value exceeds the threshold value.

The present invention also provides a signal input means for receiving a signal from a speed generator, a wheel diameter setting means for setting and outputting a wheel diameter of a train, a speed limit signal input means for receiving a speed limit signal, and a brake. A brake signal output means for outputting a signal, a speed signal output means for outputting a speed signal to the train speedometer, and a high-speed clock for an interval time of one cycle of a pulse signal generated from the speed generator output from the signal input means. Measurement using the signal, and according to the measured interval time,
Judge whether the vehicle is running at low speed, normal running, or high speed.
If it is determined to be a row, the speed calculated from this time interval
The signal is output to the speed signal output means as it is to determine that the vehicle is traveling normally.
When the speed pulse signal has been set,
When the speed is measured with the lock signal and it is determined that the vehicle is traveling at high speed,
The high-speed clock is transmitted by the number of times the wheel makes one rotation of the pulse signal.
The speed is measured by the brake signal , and the calculated speed is output to the speed signal output means.When the speed exceeds the speed limit from the speed limit from the speed limit signal input means, the brake signal is output to the brake signal output means. And a processing means for outputting

[0009]

Therefore, according to the present invention, the speed of the train is calculated based on the output values from the speed generator and the wheel diameter setting means, and a speed signal is output to the train speedometer. And a brake signal is output when the train speed exceeds the speed limit, so that accurate speed measurement and speed check without any difference from the display on the train speedometer can be performed. In addition, since the wheel diameter, which is a constant required for speed calculation, can be stored in the wheel diameter setting means that can be attached to and detached from the apparatus main body, the original setting contents can be reliably set when the ATS speed check device fails and is replaced. Besides, by removing the wheel diameter setting means after the setting, there is an effect that the setting is not changed by mistake.

Further, according to the present invention, similarly accurate speed measurement and speed check can be performed, and an interval time for one cycle of a pulse signal generated from a generator mounted on a wheel shaft is measured. Slow depending on the interval time set
Judge whether the vehicle is traveling, normal traveling, or high-speed traveling.
If determined, the speed calculated from this time interval is
Output to the speed signal output means as it is,
The speed pulse signal for multiple waves again.
The speed is measured by the traffic signal, and if it is determined that the vehicle is traveling at high speed,
The high-speed clock signal is transmitted the same number of times as the pulse signal makes one rotation of the wheel.
Because the speed is measured by the
Perform speed calculation accurately and quickly in almost constant time
be able to. In particular, the number of times the wheel makes one round during high-speed driving
By measuring the speed with the high-speed clock signal
And the pulse signal generated from the speed generator is not uniform
In this case, the error can be reduced.

[0011]

(Embodiment 1) FIG. 1 shows the structure of a first embodiment of the present invention. In FIG. 1, reference numeral 11 denotes a speed generator mounted on a wheel shaft of a train, and reference numeral 12 denotes a device main body in an ATS speed checking device. In the apparatus body 12, 13 is a signal input means for receiving a pulse signal from the speed generator 11, 14 is a limited speed signal input means for receiving a control speed signal, and 15 is a processing means for performing speed calculation and speed check. In the figure, 16 is a brake signal output means, and 17 is a speed signal output means. Reference numeral 18 denotes speed limit signal output means, reference numeral 19 denotes wheel diameter setting means which is normally removed from the apparatus main body 11, and reference numeral 20 denotes a connector for attaching and detaching the wheel diameter setting means 19 to and from the apparatus main body 12.

Next, the operation of the first embodiment will be described. In FIG. 1, a signal input unit 13 receives a pulse signal from the speed generator 11, shapes the waveform, and inputs the pulse signal to the processing unit 15 as a speed pulse signal. Next, the current wheel diameter is set and stored in the wheel diameter setting means 19. Next, when the wheel diameter setting means 19 is connected to the connector 20, a coupling signal is transmitted to the processing means 15 of the apparatus main body 12. When the processing unit 15 receives the combined signal, the processing unit 15 then sets the wheel diameter setting unit 1
A setting signal corresponding to the wheel diameter of the train is received from 9 and stored in a memory in the processing means 15, and then an end signal is transmitted to the wheel diameter setting means 19. Upon receiving the end signal, the wheel diameter setting means 19 displays the end of the setting, and can disconnect the wheel diameter setting means 19 from the connector 20. on the other hand,
The speed limit signal input means 14 receives the speed limit signal and outputs it to the processing means 15. The processing means 15 receives these signals, measures the interval of the speed pulse signal by the internal high-speed clock signal, performs the speed calculation using the wheel diameter, performs the speed check, and executes the brake signal output means 1.
6, a brake signal is output via the speed signal output means 1
7, a speed signal is output via a speed limit signal output means 1
The speed limit signal is output via the control signal 8.

As described above, according to the first embodiment,
Since the speed of the train is calculated based on the output values from the speed generator and the wheel diameter setting means, accurate speed calculation and speed checking can be performed, and the wheel diameter, which is a constant required for the speed calculation, is determined by the device body. Can be stored in the removable wheel diameter setting means, so that when the ATS speed checking device fails and is replaced, the original setting contents can be reliably set, and by removing the wheel diameter setting means after setting, This has the effect that the setting is not changed by mistake.

(Embodiment 2) Next, a second embodiment of the present invention will be described. The configuration of the ATS speed checking device in the present embodiment is the same as that of the first embodiment shown in FIG. 1 or the same as the configuration in which the wheel diameter setting means 19 is built in the device main body 12 without using the connector 20. This embodiment is characterized by the speed calculation processing by the processing means, and the speed calculation processing will be described below. Figure 2 shows the ATS
It is a figure showing the concept of pulse signal measurement of a speed check device. In FIG. 2A, the high-speed clock signal is represented by T (H
z), the wheel diameter is D (m), the number of times one cycle of the speed pulse is measured by the high-speed pulse signal is X, and the number of pulses generated during one rotation of the speed generator is P (pieces), and the interval time is t
(S) is obtained from t (s) = X (times) / T (Hz) (1). Next, the distance L advanced to the interval time t (s)
(M) is obtained from L (m) = D (m) × π / P (2), and the velocity V (k) is obtained from the equations (1) and (2).
m / h) is obtained from V (km / h) = 3.6 × L (m) / t (s) (3)

In calculating the above-mentioned speed, it is clear that the speed is more stable when a larger number of speed pulses are measured.
The time required for speed calculation differs between high-speed running with a large number of pulses shown in FIG. 2 and low-speed running with a small number of pulses shown in FIG.
The speed cannot be measured in real time. On the other hand, when the number of pulses to be measured is too small during high-speed traveling, there is a variation inherent in the speed generator, that is, since the elements that generate pulse signals in the speed generator are not uniformly spaced but slightly shifted, The calculated speed result may vary. Therefore, in this embodiment, when performing the speed calculation, one cycle of the speed pulse is measured with a high-speed clock signal, and the speed is calculated for one cycle. Then, measurement is performed again according to the number of speed pulses, and speed calculation is performed.
Note that the frequency of the high-speed clock to be sampled is always constant without changing.

Next, the vehicle speed calculation processing method in the above embodiment will be described with reference to the flowchart of FIG. First, the pulse signal from the speed generator 11 is shaped by the signal input means 13, and one cycle of the speed pulse signal is measured by the high-speed clock signal (step 31). Next, using this result, the speed of the vehicle is determined from equation (3) (step 32), and it is determined from the result of the speed calculation whether the vehicle is traveling at low speed, normal traveling, or high speed (step 33). At this time, if it is determined that the vehicle is traveling normally, the speed pulse is measured again with a high speed clock signal for several waves (constant) (step 34). At the time of high-speed running, the speed pulse is measured by the high-speed clock signal the number of times that the wheel makes one revolution (step 35). The speed is calculated again based on these results (step 36). Then, the result is output to the speed signal output means 17 (step 3).
7). When the vehicle is running at low speed, the speed result calculated in step 32 is output to the speed signal output means 17 as it is (step 37).

As described above, according to the second embodiment,
By measuring the interval time of the pulse signal generated from the generator mounted on the wheel axle, and changing the number of pulses for speed measurement in accordance with the measured interval time so as to increase at high speed, the train speed is reduced. The speed calculation can be performed accurately and quickly in a substantially constant time from a high speed to a high speed, and fluctuations in the speed display due to variations inherent in the speed generator at a high speed can be prevented.

[0018]

As apparent from the above embodiment, the present invention calculates the train speed based on the output values from the speed generator and the wheel diameter setting means and outputs a speed signal to the train speedometer. The speed limit and the train speed are compared, and when the train speed exceeds the speed limit, a brake signal is output, so that accurate speed measurement and speed check with no difference from the display on the train speedometer must be performed. Can be. Also,
Since the wheel diameter, which is a constant necessary for speed calculation, can be stored in the wheel diameter setting means detachable from the apparatus main body, the AT
The original setting contents can be surely set when the S-speed checking device fails and is replaced, and by removing the wheel diameter setting means after setting, there is an effect that the setting is not changed by mistake. .

The present invention can also perform accurate speed measurement and speed check, measure the interval time of one cycle of a pulse signal generated from a generator mounted on a wheel axle, and measure the measured time. By changing the number of pulses for speed measurement in a plurality of steps according to the interval time, there is an effect that speed calculation can be performed accurately and quickly in a substantially constant time.

[Brief description of the drawings]

FIG. 1 is a schematic block diagram of an ATS speed checking device according to a first embodiment of the present invention.

FIG. 2 is a conceptual diagram of a pulse signal measurement of an ATS speed checking device according to a second embodiment of the present invention.

FIG. 3 is a flowchart of a vehicle speed calculation process of an ATS speed checking device according to a second embodiment of the present invention.

FIG. 4 is a schematic block diagram of a conventional ATS speed checking device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Speed generator 12 Device body 13 Signal input means 14 Limited speed signal input means 15 Processing means 16 Brake signal output means 17 Speed signal output means 18 Limited speed signal output means 19 Wheel diameter setting means 20 Connector

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Hiroo Matsui 3-1, Tsunashimahigashi 4-chome, Kohoku-ku, Yokohama-shi, Kanagawa Prefecture Inside Matsushita Communication Industrial Co., Ltd. (56) References JP-A-55-163456 (JP, A) JP-A-63-23502 (JP, A) JP-A-55-472 (JP, A) JP-A-56-160859 (JP, A) JP-A-51-121382 (JP, A) JP-A-57 −125409 (JP, A) Actually open 58-153501 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B60L 3/08 B60L 15/40

Claims (2)

(57) [Claims] 1. A signal input means for receiving a signal from a speed generator, a wheel diameter of a train set and stored, and a wheel diameter setting means detachably provided on an apparatus body, and a speed limit signal received. A speed limit signal input means, a brake signal output means for outputting a brake signal, a speed signal output means for outputting a speed signal to a train speedometer, and the signal input means, the wheel diameter setting means and the speed limit signal input means. Processing means for calculating the train speed based on the signal and outputting the speed signal to the speed signal output means, comparing the speed limit with the train speed, and outputting a brake signal when the train speed exceeds the speed limit ATS speed checking device comprising: 2. A signal input means for receiving a signal from a speed generator, a wheel diameter setting means for setting and outputting a wheel diameter of a train, a speed limit signal input means for receiving a speed limit signal,
Brake signal output means for outputting a brake signal; speed signal output means for outputting a speed signal to a train speedometer; and an interval time for one cycle of a pulse signal generated from the speed generator output from the signal input means. Is measured using the high-speed clock signal, and the low-speed
Judge whether the vehicle is traveling, normal traveling, or high-speed traveling.
If determined, the speed calculated from this time interval is
Output to the speed signal output means as it is,
The speed pulse signal for multiple waves again.
The speed is measured by the traffic signal, and if it is determined that the vehicle is traveling at high speed,
The high-speed clock signal is transmitted the same number of times as the pulse signal makes one rotation of the wheel.
The speed is measured with a signal, and the calculated speed is output to the speed signal output means, and when the speed exceeds the speed limit compared with the speed limit from the speed limit signal input means, the speed is output to the brake signal output means. An ATS speed checking device comprising: a processing unit that outputs a brake signal.