JPH0543544B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention provides an automatic train control (ATC) signal that is transmitted to each block section of a railway track to set a speed limit for a vehicle in response to an on-board signal of the vehicle. The present invention relates to a vehicle speed signal sending device for displaying information.

[Conventional technology]

ATC signals are generally made by amplitude modulating a carrier wave of a specific frequency with a signal wave of a frequency corresponding to the speed limit information of the vehicle.
While this is transmitted for each block section of the track, vehicles moving on the track receive and detect the ATC signal, select the frequency of the signal wave, detect speed limit information, and detect the speed limit information. Based on the output, it controls the speed limit of the vehicle, controls the lighting of the in-vehicle traffic light, and displays speed limit information.

Therefore, the driver of the vehicle only needs to drive according to the current status of the on-board traffic lights.
Since external signals on the side of the track are no longer necessary, in recent years external signals have been gradually eliminated by installing internal signals.

However, as long as the outside traffic signal is in a section with good visibility, it is possible to see it visually even if it is in a block section ahead of the track block section where the vehicle is present.
While the driver can decelerate or accelerate while taking into account the situation in the front block section,
On-board traffic lights display the speed limit information for the block section only after the vehicle enters the block section ahead, so if the speed limit information differs from what the driver expected, the driver must suddenly decelerate or accelerate. However, there are disadvantages such as the operation becomes unsmooth and unnecessary power consumption is required.

As a countermeasure, according to Japanese Patent Application No. 58-87515 filed separately by the present applicant, speed limit information for the block section ahead is transmitted at the same time as speed limit information for the block section where the line is located, and by receiving it in these vehicles,
A method is disclosed in which speed limit information for the track-bound block section and the block section ahead is displayed simultaneously, and this makes it possible to drive while taking into account the speed limit information for the block section ahead. There is.

[Problem that the invention seeks to solve]

However, in the above-mentioned method, the speed limit information for the existing line and each block section ahead is displayed for each speed stage.Currently, there are many speed stages ranging from 5 to 17, and the configuration of related equipment is changed accordingly. This creates complex and expensive problems.

[Means for solving problems]

In order to solve the above-mentioned problem, the present invention is constructed by the following means.

That is, in an on-board signal display method, an ATC signal in which a carrier wave of a specific frequency is modulated with speed limit information is transmitted for each block section of the track, and the speed limit information is displayed on the on-board signal of the vehicle in response to reception of this ATC signal. , when the speed limit information of the block section in front of the block section where the vehicle exists is different from the block section where the vehicle is present, the frequency of the carrier wave is changed, this change in carrier frequency is detected by the vehicle, and the speed limit information of the block section ahead changes. This information will be displayed on the in-vehicle traffic light.

[Effect]

Therefore, in addition to changing the carrier wave frequency of the ATC signal and detecting this, it is only necessary to display changes in the speed limit information in the front block section, which simplifies the configuration and improves operational prediction. It will not cause any hindrance.

〔Example〕

Hereinafter, details of the present invention will be explained with reference to figures showing examples.

Figure 1 is a diagram showing the formation status of block sections and the transmission status of speed limit information.The rails of track RW are electrically divided to form block sections 1T to 8T. Leading vehicle TR _L
is on the track, the following vehicle _TR
Km/h "75" is transmitted, and the speed limit information "75" is also transmitted to the block section 2T ahead of the block section 1T in front of the line, and also to the block section 3T further ahead, whereas the preceding vehicle TR As _L approaches block section 8T, speed limit information "55" is transmitted in block sections 4T and 5T.
In block section 6T, regular braking information "0 ₁ " is transmitted as speed limit information, and in block section 7T immediately after block section 8T, no speed limit information is transmitted, and emergency braking is commanded. It is becoming.

Further, the ATC signal indicating the speed limit information V is obtained by amplitude modulating a carrier wave of a specific frequency f _c1 with a square wave of frequencies f ₁ to f ₈ determined according to the speed limit information V. Assuming that the following vehicle TR _L is on the track in block section 8T, and that the following vehicle TR _L is gradually moving to the right in the diagram, the speed limit information of block section 3T in front of block sections 1T and 2T is both "75". ” and are the same, so the carrier frequency
f _c1 is used, whereas in block section 3T, the speed limit information of block section 4T ahead of this is "55" and different, so the carrier frequency is changed.
f _c2 , and the relationship is similar in block sections 4T and 5T.

Note that in the block section 6T, since the vehicle is in a braking state in any case, any carrier wave frequency may be used, but since the situation in the front section 7T is different, the carrier frequency f _c2 is used.

Therefore, the vehicle TR receives the ATC signal, displays the speed limit information for the blocked section according to the modulation frequencies _f1 to _f3 , and detects that the carrier frequency has been changed to _fc2 . In this example, if the speed limit information for the front block section is displayed, it can be recognized that the speed limit information for the front block section changes to a lower position.

FIG. 2 is a block diagram of the ground equipment that transmits ATC signals, and a general vehicle detection device TRD is provided for each block section 1T to 3T.
Each block section 1T to 3 is
After detecting whether a vehicle TR exists at T, this detection information is given to signal logic units 1ATL and 2ATL.

The signal logic units 1ATL and 2ATL provided for each block section 1T and 2T send out speed limit information according to the detection information and give it to the modulators 1MOD and 2MOD, and in the modulators 1MOD and 2MOD,
The carrier waves from the carrier wave generators 1FC ₁ , 2FC ₁ or 1FC ₂ , 2FC ₂ given via the selectors 1SEL, 2SEL are modulated by a signal wave with a frequency according to the speed limit information, and transmitted every block section 1T, 2T. ATC is sent to the transmitters 1TX and 2TX, and sent to the orbit RW of the block sections 1T and 2T via the transmitters 1TX and 2TX.
It is intended to be transmitted as a signal.

On the other hand, the outputs of signal logic units 1ATL and 2ATL are
It is given to the comparator 1CP, where the contents of the speed limit information given from both sides are compared, and when the content from the signal logic section 2ATL is low, a comparison output is generated and the selector 1SEL is controlled. Select input A, carrier generator 1FC ₁
Modulator 1 MOD modulates the carrier wave with frequency f _c1 from
Selector 1SEL, which was being sent to input B, now selects input B, and accordingly, carrier wave generator 1FC ₂
A carrier wave with frequency f _c2 from modulator 1 MOD
sent to.

Therefore, if the speed limit information of the forward section 2T is lower than the speed limit information of the block section 1T where the vehicle TR exists, the carrier wave frequency of the ATC signal for the block section 1T changes from f _c1 to f _c2 . be done.

Also, for comparator 2CP, block section 3
The speed limit information from the signal logic unit 3ATL, which is omitted in the diagram of T, and the speed limit information from the signal logic unit 2ATL are given, and in order to control the selector 2SEL in the same way as described above, the speed limit of the block section 3T is set. If the information is low level, the carrier wave with the frequency f _c2 from the carrier wave generator 2FC ₂ is sent to the modulator 2 MOD instead of the carrier wave with the frequency f _c1 from the carrier wave generator 2FC ₁ , and the ATC signal is generated as before. carrier frequency is changed.

Note that the output of the signal logic unit 1ATL is also supplied to a comparator 1CP, which is omitted in the figure, in the block section 0T, and a similar carrier frequency change is performed in the block section 0T as well.

FIG. 3 is a block diagram _of the on-board device, in which a loop antenna ANT receives _the ATC signal shown in _{FIG .} Extract and amplify detector
Amplification and detection are performed in AD ₁ and AD ₂ ,
After mixing by OR circuit G, select amplifier SA ₁ ~
The signal wave f ₁ of the ATC signal is given to SAn.
~fn is selected and converted to direct current in rectifier circuits REC ₁ to RECn, and then relays V ₁ R to VnR are driven.

It should be noted that each contact of each relay V ₁ R to VnR, CR is numbered with a subscript to the same symbol to make it clear that it is a contact.

The output of the amplified detector AD ₂ is also given to the amplifier A, where it is amplified and then converted to direct current by the rectifier circuit RECc, which is then connected to the relay CR.
It has become a driving force.

Therefore, regardless of whether the carrier frequency is f _c1 or f _c2 , one of the relays V ₁ R to VnR operates according to the signal waves f ₁ to f _o indicating speed limit information, and the contact V ₁ R ₁ ~ The corresponding one in VnR ₁ turns on,
The speed limit information for the blocked section is displayed by lighting the indicator light of the train signal, which is omitted from the diagram.

On the other hand, relay CR operates only when the carrier frequency is changed to f _c2 , its contact CR ₁ turns on, and the corresponding indicator light of the on-board traffic light lights up, which causes the front block section to A message indicating that the speed limit information is low is displayed.

Therefore, if the speed limit information for the block section ahead is low, it will be displayed at the same time as the speed limit information for the block section where the track is present, and the driver can drive appropriately while also checking the situation for the block section ahead. You will be able to do it freely.

In FIG. 3, the antenna ANT to the relays V ₁ R to VnR are the same as the conventional on-board device, and only the bandpass filter BPF ₂ to the relay CR need be added to the conventional on-board device. Conventional on-board equipment can be easily modified.

Moreover, in FIG. 2, the objective can be achieved by simply adding comparators 1CP, 2CP, selectors 1SEL, 2SEL, carrier wave generators 1FC ₂ , 2FC _2, etc. to the conventional ground equipment.

However, carrier wave generators 1FC ₁ and 2FC ₁ , 1FC ₂
and 2FC ₂ may be common to each other, or the transmitters 1TX, 2TX to the transmission logic units 1ATL, 2ATL may be configured as one unit for each block section 1T, 2T, and the speed limit information of the forward block section In the case of a high-speed display, the carrier frequency may be further increased and the configurations of FIGS. 2 and 3 may be determined accordingly.
Similarly, it is optional to display speed limit information in the front block section in more stages.

In addition, the modulation format of the ATC signal is not limited to amplitude modulation, but various modulation methods can be selected depending on the situation.
According to this, various modifications can be made, for example, the modulator 1MOD, 2MOD, and the configuration shown in FIG. 3 may be determined.

〔Effect of the invention〕

As is clear from the above explanation, according to the present invention, with a simple configuration, not only the speed limit information of the on-track block section where the vehicle is present, but also the speed limit information of the forward block section is simultaneously displayed by the on-board signal when it is different from the on-track block section. , it becomes possible to freely decelerate or accelerate in consideration of the situation in the front block section, smoothing the operation situation and reducing power consumption, which is a remarkable effect on various railways.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the formation of block sections and the transmission of speed limit information, FIG. 2 is a block diagram of the ground equipment, and FIG. 3 is a block diagram of the onboard equipment. RW...Trajectory, 1T~8T...Block section, f _c1 , f _c2
...Carrier frequency, V...Speed limit information, TR,
TR _F , TR _L ...Vehicle, 1TX, 2TX...Transmitter, 1
MOD, 2MOD...Modulator, 1SEL, 2SEL...Selector, 1FC ₁ , 1FC ₂ , 2FC ₁ , 2FC ₂ ...Carrier generator, 1CP, 2CP...Comparator, 1ATL, 2ATL
Signal logic section, ANT...antenna, BPF ₁ , BPF ₂ ...
Bandwidth wave detector, AD ₁ , AD ₂ ...amplification detector, G...OR
Circuit, SA ₁ ~SAn...selection amplifier, A...amplifier,
REC ₁ ~ RECn, RECc... Rectifier circuit, V ₁ R ~ VnR,
CR...Relay.

Claims (1)

[Claims] 1. A vehicle speed signal sending device that sends a speed command signal from a ground device to a vehicle running on a track, comprising: a modulator MOD, a transmitter TX, and a signal logic section.
ATL, a comparator CP, a selector SEL, a first carrier generator FC1 that generates a first carrier wave,
a second carrier generator FC that generates a second carrier wave;
2, the signal logic section sends out speed limit information in a predetermined blockage section, and the comparator outputs the speed limit information sent out from the signal logic section and the forward speed limit information adjacent to the blockage section. the selector selects the signal from the first carrier wave generator when the speed limit information compared by the comparator is the same; When the speed limit information is different, the signal from the second carrier wave generator is selected, and the modulator converts the carrier wave selected by the selector into a speed command signal sent from the signal logic section. A vehicle speed signal transmitting device, wherein the transmitter transmits the signal output from the modulator to orbit.