JP3886280B2 - ATC on-board device and reception information processing method in ATC on-board device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an ATC on-board device that is a vehicle-side device of an automatic train control device (ATC: Automatic Train Control) that controls the speed of a train or the like in a railway or the like, and a reception information processing method in the ATC on-board device. is there.
[0002]
[Prior art]
In railways, ATC is used as one of means for safely operating trains. The ATC transmits the allowable driving speed information from the ground to the train side according to the interval with the preceding train and the route opening status, and continuously checks the train speed on the train side, and the allowable speed (limit speed) This is a system that automatically performs the deceleration control of the train speed by applying the brake control such that the brake is applied when the speed exceeds the upper limit and the brake is released when the speed is less than the allowable speed.
[0003]
Next, the configuration and operation of a conventional ATC will be described with reference to FIGS. FIG. 4 is a block diagram showing a configuration of a conventional ATC. As shown in FIG. 4, the ATC 10A includes an ATC ground device 11 and an ATC on-board device 12A.
[0004]
The ATC ground device 11 has a relay circuit, and necessary related information such as the position of the preceding train and the route situation in the station is taken in. Based on the related information, the ATC ground device generates an ATC signal including allowable driving speed information (ATC information) to be sent to the corresponding train, superimposes the ATC signal on the carrier wave, and the rail R of the corresponding track circuit. Flow as current.
[0005]
As shown in FIG. 4, the ATC on-board device 12A includes a power receiver 13, a receiving unit 14, a logic unit 15A, a brake control unit 16, wheels 17, a speed generator 18, and an in-vehicle signal device 19. is doing. First, the power receiver 13 takes in the ATC signal current from the rail R. The ATC signal current captured by the power receiver 13 is detected by the receiving unit 14 and output to the logic unit 15A.
[0006]
On the other hand, the traveling train constantly detects the traveling speed of the vehicle by the speed generator 18. The own vehicle traveling speed is displayed to a driver or the like by a speedometer (not shown) provided in the train, and is output from the receiving unit 14 to the logic unit 15A.
[0007]
As shown in FIG. 5, the logic unit 15 </ b> A includes one system (A system) CPU (Central Processing Unit) 21, ROM (Read Only Memory) 32, RAM (anytime read / write memory: Random Access Memory) 23, other system (B system) CPU 25, ROM (Read Only Memory) 36, RAM (Random Access Memory) 27, bus verification unit 24, and bus interface 28.
[0008]
Of these, the CPUs 21 and 25 are portions that perform processing such as computation and program execution. The ROM 32 is a storage device that stores a program executed by the CPU 21, and the ROM 36 is a storage device that stores a program executed by the CPU 25. The RAM 23 is a storage device that temporarily stores data calculated by the CPU 21, and the RAM 27 is a storage device that temporarily stores data calculated by the CPU 25.
[0009]
With such a configuration, the CPUs 21 and 25 of the logic unit 15A collate the indicated speed of the ATC signal sent from the receiving unit 14 with the current host vehicle traveling speed information. As a result of this verification, if the host vehicle traveling speed is higher than the indicated speed of the ATC signal, a brake operation command is output to the brake control unit 16. Thereby, the brake control part 16 operates a brake and decelerates the speed of a train. When the vehicle traveling speed is equal to or less than the instruction speed of the ATC signal, a brake loosening command is output to the brake control unit 16. Thereby, the brake control part 16 controls so that a brake may be loosened. At this time, the indicated speed of the ATC signal is output as an ATC in-vehicle signal to the in-vehicle signal 19 and displayed to the driver (hereinafter referred to as “present”).
[0010]
Next, a signal processing method at the time of receiving an ATC signal in the conventional ATC will be described with reference to a timing chart shown in FIG. FIG. 6 is a timing chart showing a basic signal processing method at the time of receiving an ATC signal in a conventional ATC on-board apparatus, and time elapses from the left to the right in the figure.
[0011]
The upper timing chart of FIG. 6 shows a timing chart of a certain ATC signal detected by the receiving unit 14. This ATC signal (hereinafter referred to as “ATC signal A”) has the content of “displaying a certain speed A” and is detected by the receiving unit 14 only during the period shown in the band shape. It is shown that. That is, this indicates that the ATC signal A starts to be detected at the left end in the figure of the band-like figure, and the detection is completed at the right end in the figure.
[0012]
Further, the middle timing chart of FIG. 6 shows a timing chart of another ATC signal detected by the receiving unit 14. The content of this ATC signal (hereinafter referred to as “ATC signal B”) is “to display a certain speed B”. In this figure, it is shown that the ATC signal B starts to be detected at the time of the left end in the figure of the band-like figure.
[0013]
In this case, there is a relationship of A <B between the allowable speed A indicated by the ATC signal A and the allowable speed B indicated by the ATC signal B. The speed A is lower than the speed B, and the speed B is a speed. It is faster than A. In such a case, the display of speed A is referred to as “lower display”, and the display of speed B is referred to as “higher display”.
[0014]
In addition, the lower timing chart of FIG. 6 shows a timing chart of display contents (ATC signal speed value) of the ATC in-vehicle signal actually displayed by the in-vehicle signal 19. In this figure, it is shown that the speed A is displayed at the time of the left end in the figure of the band-like figure, and then the speed B is displayed.
[0015]
When the in-vehicle signal 19 displays the ATC in-vehicle signal, the logic unit 15 in FIG. 4 determines the ATC signal detected by the receiving unit 14 and outputs the in-vehicle signal to the in-vehicle signal 19 so that the in-vehicle signal is displayed. Done. The judgment and command operations of the logic unit 15 are controlled by the CPUs 21 and 25 in FIG. 5, and the CPUs 21 and 25 execute control operations based on the programs stored in the ROMs 32 and 36.
[0016]
First, when an ATC signal is detected by the receiving unit 14, the CPU 21 detects when an ATC signal is continuously detected from the detection start time until a first predetermined time (hereinafter referred to as “operation time”) elapses. , 25, “This ATC signal satisfies a first condition (hereinafter referred to as“ first condition ”) for displaying on the in-vehicle signal 19. Is determined.
[0017]
In addition, when there are a plurality of ATC signals determined as “satisfying the first condition”, the CPUs 21 and 25 indicate that “therefore, among these ATC signals, the value of the ATC command speed is the lowest (lowest The present condition) satisfies the second condition (hereinafter referred to as “second condition”) for presenting the signal to the in-vehicle signal 19. Is determined. Therefore, when there is only one ATC signal determined as “satisfying the first condition”, the CPUs 21 and 25 determine that “only one ATC signal satisfies the second condition”. To do.
[0018]
Next, the CPUs 21 and 25 perform control so that the in-vehicle signal is displayed with the indicated speed value that is the content of the ATC signal that simultaneously satisfies the first condition and the second condition.
[0019]
In addition, when there is no ATC signal determined as “satisfying the first condition”, the CPUs 21 and 25 perform control so that the display to the in-vehicle signal is stopped.
[0020]
Further, when the ATC signal that has been determined as “satisfying the first condition” until immediately before is not detected (hereinafter referred to as “immediately passed signal”), the CPU 21 and 25 are not detected. To the second predetermined time (hereinafter referred to as “recovery time”), the immediately preceding pass signal is treated as satisfying the first condition.
[0021]
When the last pass signal is no longer detected after the recovery time, the CPUs 21 and 25 pass a third predetermined time (hereinafter referred to as “no signal mask time”) from the end of the recovery time. In the period up to this point, the previous pass signal is treated as satisfying the first condition only when there is no other ATC signal determined as “satisfying the first condition”.
[0022]
Thereafter, the CPUs 21 and 25 determine that “the previous pass signal does not satisfy the first condition” when the no-signal mask time has elapsed.
[0023]
By the above signal processing and control, as shown in the upper and lower stages of FIG. 6, after the ATC signal A is detected, when the operation time elapses, there is no other detected ATC signal. This ATC signal A is shown on the in-vehicle signal 19. Thus, the operation time is provided in order to avoid displaying the ATC in-vehicle signal with an unstable signal and to display the ATC in-vehicle signal with a reliable signal.
[0024]
Further, as shown in the upper and lower stages of FIG. 6, even if the receiving unit 14 no longer detects the ATC signal A, the in-vehicle signal 19 does not immediately enter the undisplayed state. That is, when the ATC signal A is not detected, the in-vehicle signal 19 continues to display the speed A that is immediately before the recovery time elapses from the time when the ATC signal A is not detected. Such a recovery time is provided even though the ATC signal itself sent from the ATC ground device 11 does not change, and is detected on the vehicle due to various conditions and troubles. In some cases, the ATC signal is interrupted for a short period of time (hereinafter referred to as “instantaneous interruption”). In such a case, the ATC in-vehicle signal is prevented from immediately becoming an undisplayed state.
[0025]
Further, even when the recovery time of the ATC signal has elapsed, the CPUs 21 and 25 do not immediately determine that “this ATC signal does not satisfy the first condition”. When the immediately preceding pass signal (ATC signal A in FIG. 6) is not detected following the recovery time, the no-signal mask time is counted from the end of the recovery time. Further, during the period until the no-signal mask time elapses, the immediately preceding pass signal (in the case of FIG. 6, the ATC) only when there is no other ATC signal determined as “satisfying the first condition”. The signal A) is treated as satisfying the first condition.
[0026]
After that, when the operation time of the ATC signal B has elapsed, there is another ATC signal B that satisfies the first condition. At this point, “the ATC signal A, which is the immediately preceding pass signal, is the first It is determined that the condition is not satisfied. As a result, since the ATC signal that satisfies the first condition is only the ATC signal B, the CPUs 21 and 25 determine that “ATC signal B satisfies the second condition”, and the first condition and the first condition. The command speed value B, which is the content of the ATC signal B that satisfies the two conditions at the same time, is controlled to be displayed on the in-vehicle signal 19. That is, at this time, the indication of the in-vehicle signal 19 is switched from the speed A to the speed B (see the timing chart in the lower part of FIG. 5).
[0027]
Thus, the no-signal mask time is provided in order to shorten the time for the in-vehicle signal 19 to switch from the lower display to the higher display.
[0028]
[Problems to be solved by the invention]
However, the received signal processing method in the conventional ATC on-board apparatus has a problem in the case of FIG. In other words, as shown in the timing chart of the first stage in FIG. 7, the received signal is not detected from a certain time (becomes no signal), and the same ATC signal is detected again thereafter. . In this case, as shown in the timing charts of the fourth stage and the fifth stage, the operation time of the ATC signal detected again before the no-signal mask time of the ATC signal (previously passed signal) that has not been detected elapses. Has passed. For this reason, as shown in the second stage of FIG. 7, the in-car signal 19 shows the contents of the previous pass signal without interruption.
[0029]
However, when the value of the no-signal mask time is shorter than the current value, the right end of the no-signal mask time moves to the left side of the drawing as shown by the broken line in the fourth stage of FIG. In this way, when the new no-signal mask time elapses, the operation time of the ATC signal detected again has not elapsed. For this reason, at this time, the in-vehicle traffic signal 19 stops displaying the content of the previous pass signal that has been displayed so far, and enters the undisplayed state. That is, if the value of the no-signal mask time is shortened, there is a problem that when the ATC signal is momentarily interrupted, the undisplayed state is likely to occur.
[0030]
The present invention has been made to solve the above problems, and the problem to be solved by the present invention is on an ATC vehicle that is stable against instantaneous interruption even when the value of the no-signal mask time is shortened. It is to provide a reception information processing method in a device and an ATC on-board device.
[0031]
[Means for Solving the Problems]
In order to solve the above problems, an ATC on-board device according to the present invention receives ATC information transmitted from an ATC ground device, performs brake control based on the content of the received ATC information, and controls a train speed. When the ATC information is detected, the ATC information is detected when the ATC information is detected continuously from the detection start time until the operation time that is the first predetermined time elapses. It is determined that the condition is satisfied, and among the ATC information determined to satisfy the first condition, the one having the lowest speed value is determined to satisfy the second condition, and the ATC satisfying the first condition and the second condition is determined. The ATC in-vehicle signal based on the contents of the information is displayed in the train, and when there is no ATC information determined to satisfy the first condition, the display of the ATC in-vehicle signal is stopped until immediately before If the previous pass information, which is ATC information that has been determined to satisfy one condition, is no longer detected, during the period from when it is no longer detected until the recovery time that is the second predetermined time elapses, The immediately preceding pass information is treated as satisfying the first condition, and then, when the recovery time has elapsed, it is determined that the immediately preceding pass information does not satisfy the first condition, and the immediately preceding pass information follows the recovery time. If it is no longer detected, there is other ATC information determined to satisfy the first condition during the period from the end of the recovery time until the third signal-free mask time elapses. Only if not, the immediately preceding pass information is treated as satisfying the first condition, and then the immediately preceding pass information is the first condition when the no-signal mask time has elapsed. If it is determined that the previous pass information is not detected for a time equal to or shorter than a fourth predetermined time and is detected again thereafter, the value of the operation time is set to a value shorter than the first predetermined time. The display processing of the ATC in-vehicle signal is performed by substituting for a predetermined time of 5.
[0032]
Also, the reception information processing method in the ATC on-board device according to the present invention receives ATC information transmitted from the ATC ground device, performs brake control based on the content of the received ATC information, and controls the train speed. When the ATC information is detected, the reception information processing method in the on-board ATC device performs the above-described detection when the operation time that is the first predetermined time elapses from the detection start time. It is determined that the ATC information satisfies the first condition, and among the ATC information determined to satisfy the first condition, the one having the lowest speed value is determined to satisfy the second condition, and the first condition and the second condition are determined. An ATC in-vehicle signal based on the content of ATC information that satisfies the conditions is displayed in the train, and when there is no ATC information that is determined to satisfy the first condition, the ATC in-vehicle When the previous pass information, which is ATC information that has been determined to satisfy the first condition until immediately before, is no longer detected, the second predetermined time is recovered from the point when it is no longer detected During the period until the time elapses, the immediately preceding pass information is treated as satisfying the first condition, and then, when the recovery time has elapsed, the immediately preceding pass information is determined not to satisfy the first condition, If the immediately preceding pass information is not detected following the recovery time, the first condition is satisfied during the period from the end of the recovery time until the non-signal mask time that is a third predetermined time elapses. Only when there is no other ATC information determined to be satisfied, the immediately preceding pass information is treated as satisfying the first condition, and then the no-signal mask time has elapsed. The immediately preceding pass information is determined not to satisfy the first condition, and when the immediately preceding pass information is not detected for a time equal to or less than a fourth predetermined time but is detected again thereafter, the value of the operation time is determined as follows: The ATC in-vehicle signal display process is performed by substituting for a fifth predetermined time shorter than the first predetermined time.
[0033]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a train route setting support device according to the present invention will be described with reference to the drawings.
[0034]
FIG. 1 is a block diagram showing a configuration of an ATC that is an embodiment of the present invention. FIG. 2 is a block diagram showing a more detailed configuration of a logic unit in the ATC on-vehicle apparatus of FIG.
[0035]
As shown in FIG. 1, the ATC 10 includes an ATC ground device 11 and an ATC on-board device 12. The ATC ground device 11 has the same configuration and operation as the conventional one. Further, the ATC on-board device 12 of the present embodiment includes a power receiver 13, a receiving unit 14, a logic unit 15, a brake control unit 16, wheels 17, a speed generator 18, and an in-vehicle signal device 19. ing. Among these, the component different from the conventional ATC on-board device 12A is the logic unit 15, and the other components have the same configuration and operation as the conventional one, so the description thereof is omitted. To do.
[0036]
As shown in FIG. 2, the logic unit 15 includes one system (A system) CPU 21, ROM 22, RAM 23, another system (B system) CPU 25, ROM 26, RAM 27, a bus verification unit 24, and a bus interface. 28. Among these, the constituent elements different from the conventional logic unit 15A are the ROMs 22 and 26, and the other constituent elements have the same configuration and operation as the conventional ones, and the description thereof is omitted.
[0037]
That is, the control program stored in the ROMs 22 and 26 is different in the ATC on-board device 12 of the present embodiment. Therefore, for the current control of the ATC in-vehicle signal, the CPU 21 and 25 of the logic unit 15 are performing control operations based on logic different from the conventional one. Hereinafter, the control operation will be described in detail with reference to FIG.
[0038]
FIG. 3 is a timing chart showing a signal processing method at the time of receiving an ATC signal in the ATC on-board device 12 of this embodiment, and time elapses from the left to the right in the figure. In addition, the signal and speed indication are shown in a band shape, and signal detection and indication are started at the time of the left end in the figure of the band shape, and signal detection and indication are started at the time of the right end or vertical dividing line in the drawing. Indicates that it has finished.
[0039]
The difference in the present control of the ATC in-vehicle signal of the ATC on-board device of this embodiment is as follows.
[0040]
If the previous pass signal is not detected for a time equal to or shorter than the fourth predetermined time and then detected again, the value of the operation time is replaced with a fifth predetermined time shorter than the first predetermined time. The above-described ATC in-vehicle signal display process is performed.
[0041]
Hereinafter, the logic of the present control in the present embodiment will be described in detail with reference to FIG.
[0042]
As shown in the first stage timing chart, the receiver 14 detects the ATC signal A, and as shown in the second stage timing chart, the in-vehicle signal 19 shows the ATC signal A.
[0043]
Next, after that, the receiving unit 14 no longer detects the ATC signal that has been detected so far, and after a certain period of time, the receiving unit 14 again detects the same ATC signal (hereinafter referred to as “immediately passed signal”). Start (refer to the timing chart of the first stage in FIG. 3).
[0044]
In this case, the recovery time is started from the time point when the pass signal is not detected (see the third stage timing chart in FIG. 3). During the period until the recovery time elapses, the in-vehicle signal 19 is controlled so as to continue to display the speed A that is the immediately preceding display (see the second stage timing chart in FIG. 3). This presenting control logic is the same as in the prior art.
[0045]
Thereafter, the recovery time of the previous pass signal has elapsed (see the timing chart in the third stage in FIG. 3). Then, the immediately preceding pass signal is not detected following the recovery time (see the timing chart of the first stage in FIG. 3). In this case, the no-signal mask time, which is the third predetermined time, is measured from the end of the recovery time. Further, during the period until the no-signal mask time elapses, the immediately preceding pass signal satisfies the first condition only when there is no other ATC signal determined as “satisfying the first condition”. Are treated as
[0046]
Therefore, at this time, the only ATC signal that satisfies the first condition is the immediately preceding pass signal. In such a case, the CPUs 21 and 25 determine that “ATC signal A satisfies the second condition”. As a result, the ATC signal A satisfies the first condition and the second condition, and the CPUs 21 and 25 perform control so that the contents of the previous pass signal are displayed on the in-vehicle signal device 19 (the second in FIG. 3). (See stage timing chart).
[0047]
Thereafter, the immediately preceding pass signal starts to be detected again (see the first stage timing chart in FIG. 3). In this case, the CPUs 21 and 25 measure the time during which the previous pass signal has been interrupted (hereinafter referred to as “signal disconnection time”). Then, the time when the immediately preceding pass signal is interrupted is compared with a fourth predetermined time (hereinafter referred to as “instantaneous interruption determination time”). As a result, when the value of the signal interruption time is shorter than the value of the instantaneous interruption determination time, this signal interruption is determined as “instantaneous interruption”.
[0048]
Next, when the CPUs 21 and 25 determine that “the signal interruption is an instantaneous interruption”, the value of the operation time is set to a fifth predetermined time (hereinafter referred to as “instantaneous interruption”) shorter than the first predetermined time. The above-mentioned ATC in-vehicle signal display process is performed. That is, in the fifth stage of FIG. 3, as shown by the broken line, in the operation time for instantaneous interruption, the right end moves to the left side of the drawing compared to the conventional operation time.
[0049]
As a result, as shown in the timing charts of the fourth stage and the fifth stage in FIG. 3, even if the no-signal mask time is shortened, the operation time for instantaneous interruption passes before the no-signal mask time elapses. Can be set. Therefore, as shown in the second stage of FIG. 3, it is possible to cause the in-vehicle traffic signal 19 to display the content of the previous pass signal without interruption.
[0050]
Therefore, even when the value of the no-signal masking time is shortened, it is possible to prevent the in-vehicle signal 19 from being easily hidden due to an instantaneous interruption, and to improve the stability against the instantaneous interruption.
[0051]
As the value of each time described above, for example, when the recovery time is 400 milliseconds and the no-signal mask time is 400 milliseconds, the operation time that has been about 300 milliseconds in the past is used. It should be about 100 milliseconds. In this way, the operation time for instantaneous interruption is sufficiently small with respect to the value of the no-signal mask time, and the operation time for instantaneous interruption passes before the no-signal mask time elapses, and it is easy to continue the display. It becomes. Further, the value of the instantaneous interruption determination time is set to a value of about 1 second or less, for example.
[0052]
In the above, the ATC signal detected by the receiving unit 14 corresponds to ATC information. Further, the immediately preceding pass signal, which is an ATC signal that has been determined as “satisfying the first condition” until immediately before, corresponds to the immediately preceding pass information.
[0053]
In addition, this invention is not limited to the said embodiment. The above-described embodiment is an exemplification, and the present invention has substantially the same configuration as the technical idea described in the claims of the present invention, and any device that exhibits the same function and effect is the present invention. It is included in the technical scope of the invention.
[0054]
For example, in the above embodiment, the description has been given by taking the railway as an example where the ATC is used. However, the present invention is not limited to this example, and other applicable objects such as a monorail and a new transportation system may be used. Also good. Moreover, this invention is applicable not only to an ATC system but to ATO (automatic train operation system). In addition to the signal current that flows through the rail, radio waves, light, and the like can also be used for the medium that transmits ATC information.
[0055]
In the above embodiment, the example in which the logic unit 15 of the ATC on-board device 12 performs the display control of the in-vehicle signal is described. However, the present invention is not limited to this example, and other configurations, for example, ATC A signal discriminating unit such as a CPU and a display control unit may be provided in the receiving unit 14 of the on-board device 12 and the above-mentioned in-vehicle signal display control may be performed by the signal discriminating unit and the display control unit.
[0056]
【The invention's effect】
As described above, according to the present invention, in addition to the conventional display control of the ATC in-vehicle signal, “when the previous pass information is not detected for a time equal to or less than the fourth predetermined time but is detected again thereafter. Has newly set a logic of “replacement of the value of the operation time with a fifth predetermined time shorter than the first predetermined time to perform the ATC in-vehicle signal display process”, so that the value of the no-signal mask time This has the advantage that the stability against momentary interruption can be improved even when the length of the window becomes shorter.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of an ATC according to an embodiment of the present invention.
2 is a block diagram showing a more detailed configuration of a logic unit in the ATC on-board device of FIG. 1; FIG.
3 is a timing chart for explaining a signal processing method when an ATC signal is received in the ATC on-board apparatus of FIG. 1; FIG.
FIG. 4 is a block diagram showing a configuration of a conventional ATC.
FIG. 5 is a block diagram showing a more detailed configuration of a logic unit in a conventional ATC on-board device.
FIG. 6 is a timing chart (1) for explaining a signal processing method when an ATC signal is received in a conventional ATC on-board device.
FIG. 7 is a timing chart (2) for explaining a signal processing method when receiving an ATC signal in a conventional ATC on-board device.
[Explanation of symbols]
10,10A ATC
11 ATC ground device 12, 12A ATC on-vehicle device 13 power receiver 14 receiving unit 15, 15A logic unit 16 brake control unit 17 wheel 18 speed generator 19 in-car signal device 21 CPU (A system)
22 ROM
23 RAM
24 Bus verification unit 25 CPU (B system)
26 ROM
27 RAM
28 Bus interface 32, 36 ROM
R rail

Claims (2)

An ATC on-board device that receives ATC information transmitted from an ATC ground device, performs brake control based on the content of the received ATC information, and controls a train speed,
When the ATC information is detected, it is determined that the ATC information satisfies the first condition when the ATC information is continuously detected from the detection start time until the operation time that is the first predetermined time elapses. Of the ATC information determined to satisfy the condition, the one with the lowest speed value is determined to satisfy the second condition, and an ATC in-vehicle signal based on the contents of the ATC information satisfying the first condition and the second condition is obtained. When the ATC information determined to satisfy the first condition does not exist, the display of the ATC in-vehicle signal is stopped.
When the immediately preceding pass information, which is ATC information that has been determined to satisfy the first condition until immediately before, is no longer detected, during the period from the point of no longer being detected until the recovery time that is the second predetermined time elapses Is handled as if the immediately preceding pass information satisfies the first condition, and then determines that the immediately preceding pass information does not satisfy the first condition when the recovery time has elapsed,
If the immediately preceding pass information is not detected following the recovery time, the first condition is satisfied during the period from the end of the recovery time until the third signal-free mask time elapses. Only when there is no other ATC information determined to be satisfied, the immediately preceding pass information is treated as satisfying the first condition, and when the no-signal mask time has elapsed, It is determined that the condition is not satisfied,
When the previous pass information is not detected for a time equal to or shorter than the fourth predetermined time but is detected again thereafter, the value of the operation time is replaced with a fifth predetermined time shorter than the first predetermined time. Then, the ATC on-board device is characterized in that the ATC in-vehicle signal display process is performed. A reception information processing method in an ATC on-board device that receives ATC information transmitted from an ATC ground device, performs brake control based on the content of the received ATC information, and controls a train speed,
When the ATC information is detected, it is determined that the ATC information satisfies the first condition when the ATC information is continuously detected from the detection start time until the operation time that is the first predetermined time elapses. Of the ATC information determined to satisfy the condition, the one with the lowest speed value is determined to satisfy the second condition, and an ATC in-vehicle signal based on the contents of the ATC information satisfying the first condition and the second condition is obtained. When the ATC information determined to satisfy the first condition does not exist, the display of the ATC in-vehicle signal is stopped.
When the immediately preceding pass information, which is ATC information that has been determined to satisfy the first condition until immediately before, is no longer detected, during the period from the point of no longer being detected until the recovery time that is the second predetermined time elapses Is handled as if the immediately preceding pass information satisfies the first condition, and then determines that the immediately preceding pass information does not satisfy the first condition when the recovery time has elapsed,
If the immediately preceding pass information is not detected following the recovery time, the first condition is satisfied during the period from the end of the recovery time until the third signal-free mask time elapses. Only when there is no other ATC information determined to be satisfied, the immediately preceding pass information is treated as satisfying the first condition, and when the no-signal mask time has elapsed, It is determined that the condition is not satisfied,
When the previous pass information is not detected for a time equal to or shorter than the fourth predetermined time but is detected again thereafter, the value of the operation time is replaced with a fifth predetermined time shorter than the first predetermined time. Then, the reception information processing method in the ATC on-board apparatus is characterized in that the ATC in-vehicle signal display process is performed.

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