JPS6211701B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a vehicle detection system that detects the presence of a vehicle in each section formed by dividing the passage when a vehicle having insulating wheels such as rubber tires travels on a predetermined passage. It is related to the device.

Conventionally, railway vehicle detection uses an electrical short circuit between the rails caused by an axle, and a signal current is passed between both rails in a track section formed by insulating the rails, and this signal current is sent to a signal receiver. When the signal current is bypassed by the axle, the signal current flow to the signal receiver disappears, so this is detected by the signal receiver, and based on this detection output, the corresponding track section is The building was closed.

However, in vehicles using insulated wheels such as rubber tires, it is not possible to short circuit the axle, making it impossible to detect the vehicle by the above-mentioned means.
“Vehicle detection device” (Japanese Patent Application No. 55-85077 (Japanese Patent Publication No. 60-52019) filed separately by the applicant;
154465 (Special Publication No. 60-52020)) etc.
A vehicle transmits signals of different frequencies, called check-in signals and check-out signals, which are received by a loop-shaped antenna installed in the path of the vehicle, thereby detecting the presence of a vehicle in a specific section. A method to do so has been proposed.

However, in such means, the adjacent first
If a vehicle enters the second section from the first section of the second section due to overrunning, etc., changes the direction of travel of the vehicle, and then retreats from the second section to the first section, the second section is blocked. This situation was maintained, creating a serious drawback in that re-entry into the second section was blocked even though no vehicles were present.

The purpose of the present invention is to fundamentally solve these conventional drawbacks, and by changing the direction of travel of the vehicle, a check-out signal is transmitted from the front part, which has been transmitting a check-in signal, and The vehicle completely retreated from the second section, which had been blocked, to the first section in response to the fact that the check-in signal was now being sent from the rear, where the check-out signal had been sent until now. The present invention provides an extremely effective vehicle detection device that can bring the vehicle into a blockage release state.

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

FIG. 1 is a block diagram showing the entire configuration. In this case, antennas are installed at the bottom of one end on the right side of the figure and at the bottom of the other end on the left side of the figure in a two-vehicle connected vehicle V.
ANT ₁ and ANT ₂ are provided, together with ATC (Automatic Train) at one end and the other end.
Control.) Antennas ANT ₃ and ANT ₄ are provided for signal reception.

However, for the antennas ANT ₁ and ANT ₂ , the switch S ₁ and S ₂ are operated depending on the direction of travel of the vehicle, and the check-in transmitter is switched to the antenna ANT ₁ and ANT ₂ .
TX _i1 , TX _i2 and checkout transmitter TX _p1 ,
Since TX _p2 is selectively connected, when one end is in the forward direction, a check-in signal is transmitted via antenna ANT ₁ , and the antenna
While a checkout signal is transmitted via ANT ₂ , this relationship is reversed when the other end is in the forward direction.

In addition, in the passage R of the vehicle V facing the antennas ANT ₁ to _{ANT 4} , a loop antenna-shaped section loop L is provided for each section and over the entire _area . , ANT ₂ receives the check-in signal and check-out signal, and also transmits the ATC signal, and this section loop L and the detection receiving section
RX _d and ATC transmitter TX _a are matching transformers
They are coupled via MT ₁ , MT ₂ and a three-turn transformer HYB.

The detection receiving section RX _d is composed of a check-in receiving section RX _i and a check-out receiving section RX _p ,
These detect the check-in signal and the check-out signal, and these detection outputs D _s
is given to the block logic section LG.

Note that the detection receiving section RX _d , the blocking logic section LG and the ATC transmitting section TX _a are provided for each section.
The detection output D _c of the adjacent section is also given to the block logic section LG, which determines the section block state using the logic configuration described later, gives a command to the ATC transmitter TX _a , and causes the transmitter TX _a to send out a stop signal. , when this stop signal is received by the ATC receivers RX _a1 and RX _a2 of the vehicle V, it is displayed on the in-vehicle signal devices SD ₁ and SD ₂ , and this information is sent to the logic devices LE ₁ and LE ₂ . It is designed to control brake operations, etc.

In addition, to ensure safety, in order to detect a failure in the section loop L or the detection receiver RX _d , the reference signal from the reference signal transmitter TX _r is sent to the matching transformers MT ₃ and MT _{4 .}
The signal is sent to the section loop L via the section loop L, and is always received by the check-in receiving section RX _i .

The configurations of the check-in receiving section RX _i and the check-out receiving section RX _p are disclosed in the above-mentioned separate application, so the details will be omitted, but the outline of the configuration will be as follows.

In other words, since the check signal that the check-in receiving unit RX _i constantly receives is a carrier wave of a specific frequency subjected to amplitude modulation using a rectangular wave, the check-in signal and the check signal with the set frequency are sent to the vicinity of this signal. The noise components are removed through a bandpass filter that passes the noise, the amplitude is limited and detected, and the noise above a predetermined level is extracted using a Schmitt trigger circuit, etc., and then rectified and smoothed. The relay IN is normally driven by the relay IN, and the relay IN continues to operate upon receiving the reference signal.

In this state, when a check-in signal arrives, it is superimposed on the reference signal, and after amplitude limitation, the modulation degree of the reference signal apparently decreases, so the components extracted above a predetermined level by the Schmitt trigger circuit, etc., are reduced. , by restoring relay IN,
A check-in signal is detected.

In addition, since the checkout signal uses a frequency different from that of the checkout signal and the checkin signal in the checkout receiving section RX _p , in addition to using a bandpass filter to pass this signal, a configuration similar to that described above is used. Normally, the relay OUT is restored and the relay OUT is activated by the arrival of the checkout signal.
OUT is now working.

Therefore, in practice, the contacts of the relays IN and OUT are used as the detection output D _s , and the relay contacts in the block logic section LG of the adjacent section are also used as the detection output D _s from the adjacent section.

In Figure 2, the section 1T corresponding to the station platform PF is the first section, and the adjacent section 2T is the first section.
is defined as the second section, and both sections 1T and 2T are shown as paths for the vehicle V. According to the position of the vehicle V, the relays 1T _IN and 2T _IN of the check-in receiving section RX _i in both sections 1T and 2T, and , checkout receiver RX _p relay 1T _OUT , 2T _OUT
This is a timing chart showing the situation in which the system operates or recovers, where H indicates operation and L indicates recovery.

That is, relays 1T _IN and 2T _IN are constantly operated by the check signal, and when the vehicle V enters section 1T, relay 1T _IN is restored by the check-in signal and the check-in receiving section RX _i of section 1T is activated. generates a detection force, and when the vehicle V moves forward, the checkout signal activates the relay _1TOUT , and the checkout receiving section _RXp in the section 1T generates a detection force.

In addition, if vehicle V enters section 2T only at the front end due to overrunning, etc., relay 2T _IN is restored by the check-in signal, check-in receiving section RX _i of section 2T generates a detection force, and Since the check-in signal cannot be received at 1T, the relay 1T _IN operates, and the check-in receiving section RX _i in the section 1T eliminates the detection power.

Then, when the situation reached, the driver moved to the rear driver's seat and changed the direction of travel because it was a one-man car without a conductor and it was impossible to check the rear from the front driver's seat. Along with doing so, the first
When the switchers S ₁ and S ₂ shown in the figure are switched, a check-out signal is transmitted from the front section and a check-in signal is transmitted from the rear section, resulting in the following state.

Then, in the section 1T, the check-in signal is received again, the relay 1T _IN is restored, and the check-in receiving section RX _i of the section 1T generates a detection force.
Checkout signal cannot be received and 1T _OUT
In section 2T, the check-in signal can no longer be received, so relay 2T _IN operates again, and upon reception of the check-out signal, relay 2T IN operates again.
T _OUT operates, and the checkout receiving section RX _p in section 2T generates a detection force.

In the state of , if the vehicle V moves forward after switching the forward direction and completely moves backward to section 1T, relay 1T _OUT is activated by reception of the checkout signal in section 1T, and the vehicle V moves forward in section 1T.
The checkout receiver RX _p generates a detection force, and the checkout signal cannot be received in section 2T, and relay 2T _OUT is restored, and the checkout signal is not received in section 2T.
The checkout receiver RX _p of T eliminates the detection power.

Figure 3 shows the above relays 1T _IN , 1T _OUT , 2
Operation and recovery of T _IN , 2T _OUT and similar relay 3T _OUT in section 3T adjacent to section 2T
It is also a circuit diagram of a block logic unit LG that performs block control in the section 2T based on the operation and recovery of the relay 3TR of the block logic unit LG in the section 3T, and illustrates a case where it is constituted by a relay.

In Fig. 3, relay 2TR is always in operation, and when the vehicle V enters section 2T, it is detected and restored, and the closing of restoration contact 2TR ₅ sends a command to ATC transmitter TX _a of section 2T. The vehicle then enters a blocking state that prevents subsequent vehicles from entering section 2T.

However, the circuit of relay 2TR includes the recovery contact 3 of similar block relay 3TR in section 3T.
TR ₁ and operating contact 3T _{OUT1 of checkout relay 3T OUT , which} corresponds to relays 1T OUT and 2T _OUT , are inserted for the purpose of ensuring operation, and in the initial state,
Contact 3T _OUT1 is open while relay 3T _OUT is being restored, and the circuit of relay 2TR is not configured. Therefore, power supply B is applied using non-lock type preset switch PS to forcibly operate relay 2TR, and then it is closed. It is necessary to perform self-holding and presetting using the operating contact _2TIN4 , the recovery contact _2TOUT4 , and the own operating contact _2TR4 .

Incidentally, the relay 3TR in the adjacent section 3T is also brought into operation by a similar preset.

If relay 2TR goes through the state shown in Figure 2 while it is operating, contact 2T _IN4 will open due to the recovery of relay 2T _IN , and since relay 2TR will recover, section 2T will become blocked and,
Operation contact 1T _IN1 closes due to the operation of relay 1T _IN , and relays 1 and 2T _IN as the first logic element operate and close via the closing operation contact 1T _OUT1 and recovery contacts 2T _IN1 and 2T _OUT1 . Self-maintenance is performed by the self-operating contacts 1 and 2T _IN1 through the recovery contact _2TR1 in the current state, and the state of is detected and stored, and the operating contacts 1 and 2 are output as memory outputs.
Close T _IN2 .

Then, when the state is reached, relay 1T _IN ,1
Due to the restoration of T _OUT and the operation of relays 2T _IN and 2T _OUT , the recovery contacts 1T _IN2 and 1T _OUT2 and the operating contacts 2T _IN2 and 2T _OUT2 are closed, and assuming that the operating contacts 1 and 2T _IN2 are closed, Same contact 1,
Relay as second logic element via 2T _IN2
After the FBCR operates, it holds itself through its own operation contact FBCR ₁ and the closing recovery contact 2TR ₂ ,
Detects and stores the state of , and closes operating contact FBCR ₂ as a storage output.

Furthermore, if the state is reached, the operating contact 1T _OUT 3 and the recovery contact 2T _OUT3 will close due to the operation of relay 1T _OUT and the recovery of relay 2T _OUT , and assuming that the operating contact FBCR ₂ is closed, the same contact will close.
Relays ₂ and 1PSR as the third logic element operate via FBCR 2, 2T _IN3 and recovery contact 1T _IN3 , and perform self-holding via their own operating contacts 2 and 1PSR ₁ and the closed recovery contact 2TR ₃ . A detection response to the state of , is performed.

Then, operating contacts 2 and 1PSR ₂ close and complete the circuit of relay 2TR together with contacts 2T _IN4 and 2T _OUT4 which are currently closed, so relay 2TR operates again and performs self-holding by self-contact 2TR ₄ . At the same time as the block state of section 2T is released, contact 2
Open TR ₁ , 2TR ₂ , 2TR ₃ , relay 1, 2T
By restoring _IN , FBCR, 2, 1 PSR, all circuits return to the state before vehicle V entered section 2T.

That is, when the vehicle V enters the section 2T, the section 2T is temporarily blocked, but after changing the direction of travel, the vehicle V moves from the section 2T to the section 1T.
When vehicle V completely retreats to section 2T, the blockage of section 2T is released. Therefore, if vehicle V enters section 2T due to overrunning, etc., and then retreats to section 1T for the purpose of correcting the stopping position, etc., re-entering section 2T is not possible. This is acceptable and provides the same results as vehicle detection by axle.

In addition, in Fig. 3, the contacts of each relay 1T _IN , 1T _OUT , 2T _IN , 2T _OUT are inserted in various places to ensure operation, but the states in Fig. 2 ~
Contacts 1T _IN1 and 2T _IN respond significantly according to
₁ , 2T _OUT 2, 1T _IN2 , 1T _OUT3 , 2T _OUT3 ,
1, 2T _IN2 , FBCR ₂ only relay 1, 2T _IN ,
It may be used in the main circuit of FBCR, 2, 1 PSR, and a highly reliable semiconductor logic circuit may be used in place of the relay, and the forms of the verification signal, check-in signal, check-out signal, etc. Accordingly, the check-in receiving section RX _i and the check-out receiving section RX i can be selected.
The present invention can be modified in various ways, such as by simply determining the configuration of RX _p .

As is clear from the above description, according to the present invention, even in a vehicle using insulated wheels, when the front part of the vehicle enters the second section from the first section and retreats to the first section by switching the direction of travel, The blockage in the second section is automatically released, and vehicle detection, which has exactly the same function as the vehicle detection means using an axle short circuit, is performed reliably and accurately, so it has a remarkable effect in new transportation systems etc. that use rubber timers. .

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, and FIG. 1 is a block diagram of the entire configuration, and FIG. 2 is a timing chart showing the situation in which the relays of the check-in receiving section and the check-out receiving section operate or restore depending on the position of the vehicle. FIG. 3 is a circuit diagram of the block logic section. V...Vehicle, TX _i1 , TX _i2 ...Check-in transmitter, TX _p1 , TX _p2 ...Check-out transmitter,
ANT ₁ , ANT ₂ ...Antenna, _S1 , _S2 ...Switcher, L...Section loop, RX _i ...Check-in receiver, RX _p ...Check-out receiver, LG...
Block logic section, IN...check-in relay,
OUT...Checkout relay, 1,2T _IN ...
...Relay (first logic element), FBCR...Relay (second logic element), 2,1PSR...Relay (third logic element), 2TR...Relay (blocking relay).

Claims (1)

[Claims] 1. Antennas provided at one end and the other end of the vehicle, a check-in transmitter that transmits a check-in signal through the antenna in the middle front part, and a check-in signal through the antenna in the middle rear part. a check-out transmitter for transmitting a signal; a switch for selectively connecting the check-in transmitter and the check-out transmitter to each of the antennas according to the traveling direction of the vehicle; A section loop provided for each section of the passage and extending over the entire section, and a check-in receiving section and a check-out receiving section provided for each section for detecting the check-in signal and check-out signal received by the loop. and a block logic unit that detects the presence of the vehicle based on the detection outputs of the check-in receiving unit and the check-out receiving unit in both adjacent sections, and blocks the section into which the front part of the vehicle has entered. In the detection device,
When the front part of the vehicle enters the second section of the adjacent first and second sections, the check-in receiving section of the second section generates a detecting force, and the check-in receiving section of the first section generates a detecting force. a first logic element that stores this state in response to disappearance of the vehicle; and a check-out signal is transmitted from the front part of the vehicle by switching the direction of travel when the front part of the vehicle enters the second section. And in response to a check-in signal being transmitted from the rear section, the check-out receiving section in the second section producing a detection force, and the check-in receiving section in the first section producing a detection force, the first logic element a second logic element that stores this state on the premise that a memory output of has occurred; and a second logic element that stores this state on the assumption that a storage output of When the checkout receiving section generates a detection force and the checkout receiving section in the second section eliminates the detection force, the checkout receiving section responds on the premise that the memory output of the second logic element is generated; A vehicle detection device characterized in that the blockage logic section is provided with a third logic element for canceling the blockage state of the second section.