JPS5821135A - Detector for car - Google Patents

Abstract

PURPOSE:To obtain a detector also available for cars using rubber tires by mounting transmitting/receiving parts on both the cars of a two-car vehicle respectively, coupling these parts to a detection receiving part of a division loop in a car route and connecting a block logical part using three logical elements. CONSTITUTION:Antennas (ANTs) 1, 2 and ATC ANTs 3, 4 are mounted both the end parts of a two-car vehicle V. Check-in and check-out transmitters TX i1, i2 and TX o1, o2 are selectively connected by a change-over switches S1, S2. A loop antenna-like division loop is fitted to a route R of the vehicle V and a detection receiving part Rxd is connected. When the front part of the vehicle advances from the 1st division to the 2nd division and then backs to the 1st division by switching the advancing direction, a block logical part using three logical elements releases the block of the 2nd division automatically, so that it is possible to attain car detection having quite the same function as a car detecting means using the short of cars.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a vehicle having an insulating vehicle such as a rubber tire.
The present invention relates to a vehicle detection device that detects the presence of a vehicle in each section formed by dividing the path when driving along a predetermined path.

Conventionally, railway vehicle detection uses an electrical short circuit between the rails by an axle, and a signal current is passed between the two rails of the track section formed by insulating the rails, and this signal current is used for signal reception. If 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 relevant track section was being blocked.

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. Patent Application No. 1985-85077, 1
No. 54465) etc., signals of different frequencies called check-in signals and check-out signals are transmitted from the vehicle, and these are received by a loop-shaped antenna installed in the path of the vehicle. A method for detecting the presence of a vehicle in a specific section has been proposed.

However, in such a method, the width of the vehicle enters the second section from the first section of the adjacent first and second sections due to overrunning, etc., and after changing the direction of travel of the vehicle, the vehicle width is changed from the first section to the first section. If the vehicle retreats into the section, the second section remains blocked, and even though there are no vehicles in the i2 section, angle entry is blocked, resulting in a serious drawback.

The present invention has an object of fundamentally solving such drawbacks of the conventional technology, and by changing the direction of travel of the vehicle width, a check-out signal is transmitted from the front part, which has conventionally transmitted a check-in signal, and In response to the fact that the check-in signal is now being sent from the rear, which was previously transmitting the check-out signal, the vehicle completely retreats from the second section, which was once blocked, to the first section. The object of the present invention is to provide a highly effective vehicle detection device that disables the blockage due to the presence of a vehicle.

Hereinafter, the present invention will be explained in detail with reference to figures showing examples.

Figure 1 is a block diagram showing the entire configuration; in this case,
Figure of two connected vehicles: Antenna ANT1, A- at the bottom of one end on the right side and the bottom of the other end on the left side of the figure.
NT2 is provided, and together with these, an ATC (Automatic, Train Control) is provided at one end and the other end.
trol, ) antenna for signal modification ANT3, A
NT4 is provided.

゛ However, antenna ANT1. ANT2 i, vehicle V (7) depending on the direction of travel, switch S1. , S2 is operated, f
! : Check-in transmitter TX11 for antenna ANTI, ANT2.

TXi2 and Qchetufa? transmitter TXol,+
When TXo2 is selectively connected and one end is in the forward direction, a check-in signal is transmitted via antenna AN'l'1, and antenna ANT2 is
On the other hand, when the other end reaches in the forward direction, this relationship is reversed.

In addition, a loop antenna-like section loop L is provided in each section and over the entire area in the passage R of the vehicle V, facing the antennas ANT1 to ANT4, so that the antennas ANT1. While receiving the check-in signal and check-out signal from ANT2,
TC signal? This section loop L, the detection receiving section RXd and the ATC transmitting section TXa are used for transmission.
are matching transformers MTI, MT2 and three-turn transformers HY
They are connected via B.

The detection receiving section RXd is composed of a check-in receiving section RXi and a check-out receiving section RXo, which detect a check-in signal and a check-out signal, and block the detection output Ds of these by a logic section LG.
giving to

In addition, the detection receiving section RXd, the blocking logic sections LG and A
A TC transmitter TX is provided for each section, and a block logic section LG receives a detection output of the adjacent section. is also given, determines the section blockage state according to the logic configuration described below, gives a command to the ATC transmitter TX, causes the transmitter TXa to send out a stop signal, and this stop signal is sent to the ATC receiver Rx of the vehicle.
l When received at J RXL2, the in-vehicle signal S
This information is displayed on the DI and SD2, and this information is given to the logical devices LE1 and LE2 to control the boob key operation and the like.

However, to ensure safety, the section loop L to the detection receiving section R
In order to detect a fault in
Xl is always received.

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

That is, the check-in receiving unit RXi determines whether the constantly received reference signal is from a specific layer? Since the carrier wave is amplitude-modulated using a rectangular wave, the noise component is removed through a bandpass filter that passes the check-in signal and the reference signal with a set frequency to the vicinity of the carrier wave. Then, after limiting the amplitude and extracting the signal above a predetermined level using a detection system or Schmitt trigger circuit, etc., rectification and smoothing are performed to drive relay IN. (by receiving the signal), the relay IN continues its operation.

In this state, when a check-in signal arrives, it is superimposed on the reference signal, and after amplitude limitation, the components extracted above a predetermined level by the reference/trigger circuit, etc., decrease, and the relay IN
The check-in signal is detected by the recovery of the check-in signal.

Since the checkout signal uses a frequency different from that of the check signal and the check-in signal, the check-out receiving unit RXo uses a bandpass filter to pass this signal, and has almost the same configuration as described above. Therefore, the relay OUT is normally restored, and the V-OUT is activated upon arrival of the checkout signal.

Therefore, in practice, the relay IN is used as the detection output Ds.
and OUT contacts are used, and even if the detection output from the adjacent section is detected, the relay contact in the block logic section LG of the adjacent section is used.

Figure 2 shows section 1T corresponding to station platform PF.
is defined as the first section, and the section 2T adjacent thereto is defined as the second section, and both sections IT and 2T are shown as a path for the vehicle V, and both sections IT and 2TI are shown according to the position of the vehicle V.
Relay ITrNr of check-in receiving unit PXi in C
2TZN s and checkout receiving section RXo
Relay ITouy, 2TOU? This is a timing chart showing the situation in which the system operates or recovers, where H indicates operation and L indicates recovery.

In other words, relay ITru + 2'rrN is constantly operated by the reference signal, and when vehicle V enters section 1T, ■
If the condition is reached, the check-in signal will trigger the relay IT
When the rN is restored and the vehicle V moves forward further to the state shown in ■, the checkout signal causes the serial relay ITou? works.

In addition, if vehicle V enters section 2T only in the previous section due to overrunning, etc., and enters the state shown in ■, relay 2 is activated by the check-in signal.
When the TIN is restored, the check-in signal cannot be received in the section 1T, so the relay ITIN is activated.

Next, after the situation described in ■, 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 driver's seat in the front. At the same time, by switching the switch sl and S2 shown in Fig. 1, a check-out message will be transmitted from the front section at the current location, and a check-in signal will be transmitted from the rear section at the current location. As a result, the state becomes as shown in (■).

Then, in section 1T, the check-in signal is received again and L/'-ITIN is restored, and at the same time, the check-out signal can no longer be received and ITout is also restored, and in section 2T.
Then, the relay cannot receive the check-in signal:
? 'rr* works again, and upon reception of check No. 791, the serial relay 2Tou? works.

In the state of ■, when the vehicle V moves forward after switching the forward direction and completely retreats to the section 1T, and becomes the state of ■, the relay IToo is activated by the checkout signal VC in the section 1T. , In the section 2T, the checkout signal cannot be received and the SiriRelay 2TOIJT is restored.

Figure 3 shows the above relay fT1a r ITou! ,2
TrNt2To'+r operation, recovery, and section 2TI
C Similar relay 3'rouT in adjacent section 3T
Furthermore, this is a circuit diagram of a block logic unit LG that performs block suppression 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 the block logic section LG is configured as 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 ATC of section 2T is restored by closing the recovery contact 2TR5.
A command is given to the transmitting units TX and L to transition to a closing state in which the following vehicle is prevented from entering the section 2T.

However, the circuit of relay 2TR includes a recovery contact 3TR1 of a similar blocking relay 3TR in section 3T, and an operating contact 3TOU of checkout relay 3Touy, which corresponds to relay ITouy + 2Too. 1 is inserted for the purpose of ensuring operation, and in the initial state, relay 3TOU?
During restoration, multi-contact 3Tool was open and the circuit for relay 2TR was not configured, so stain source B was applied to the non-locking preset switch PS to force relay 2TR to operate. , operating contact 2T during closing
It is necessary to perform self-holding and presetting using XN4, recovery contact 2Tour4, and own operating contact 2TR4.

Note that the relay 3TR in the contact section 3T also enters a multi-operation state due to a similar preset.

While relay 2TR is operating, it goes through the states shown in Figure 2 ■ and ■.
When the state is reached, contact 2TZN4 opens due to the restoration of relay 2'r I N, and relay 27R is restored, so that section 2T becomes blocked and relay ITn+
The multi-action contact lTlN1 closes due to the operation of , and the operating contact ITOLITI and recovery contact 2TI) 11 +
Relay 1- as the first logic element via 2TOUT1
After the 2TIN operates, it performs self-holding through its own operating contacts 1 and 2TIN1 via the restoration contact 2TR1 which is in the open state, and the state (2) is detected and stored.

Then, when the state becomes ■, the relay I TxN, IT
Due to the recovery of OUT and the operation of relays 2TIN and 2Tout, recovery contacts lTlN2 and ITotr! '2
% and operating contact 2TIN212Tou? 2 closes, the relay FBCR as the second logic resistor operates via the operating contacts 1 and 2Trw2 which are closed, and then self-holds via its own operating contact FBCR and the recovery contact 2TR2 which is closing. , (2) are detected and stored.

Furthermore, if the state of
y3 and recovery contact 2Touy3 are closed, and closed contact FBCR2t 2TZN3 and recovery contact 1T
Relay 2/IPSR as third logic resistor via lN3
In addition to the operation, it performs self-holding through its own operation contact 2-1PsJ and the closed recovery contact 2TR3, and the detection of the state (2) is performed.

Then, operating contacts 2 and 1PSR2 close, and the circuit of relay 2TR is completed together with contacts 2Txn< and 2Toute4, which are currently closed, so relay 2TR operates again and performs self-holding through self-contact 2TR4. , at the same time as canceling the block state of section 2T, contact 2TR1+ 2TR
Open 2+2TR3, relay 1・2T111, F
By restoring BCR, 2.1 PSR, vehicle V
All circuits return to the state before entering section 2T.

That is, when the vehicle V enters the section 2T, the section 2T is temporarily blocked, but when the direction of travel is changed and the vehicle V completely retreats from the section 2T to IT,
Since the block in section 2T is lifted, 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 will be permitted. The same results as vehicle width detection using the axle can be obtained.

In addition, the frame shown in FIG. 3 or a highly reliable semiconductor logic circuit may be used, and the forms of the verification signal, check-in signal, check-out signal, etc. can be arbitrarily selected depending on the conditions. According to this, check-in receiving section P
The present invention can be freely modified, such as by determining the configurations of Xi and the checkout receiving unit RX0.

As is clear from the above description, according to the present invention, even in a vehicle using insulated wheels, the front part of the vehicle enters from the first section to the second section, and when the direction of travel is changed, the front part of the vehicle enters the second section. When backing up, the block in the second section is automatically released, and vehicle detection is performed reliably and accurately, which has exactly the same function as a vehicle detection method using an axle short circuit, which is particularly useful in new transportation systems that use rubber tires. exhibits an effect.

[Brief explanation of drawings]

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 diagram showing a 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. The chart, FIG. 3, is a circuit diagram of the block logic section. V 111111 a vehicle, TXil, TX12°
000 Check-in transmitter' T”ol H'rx02
Sachi・Ita・Checkout transmitter, ANTl, ANT2
-... Antenna, Sl. S2...Switcher, L"...Section loop, RXi
...Conflict check-in receiving section, Rx6...Checkout receiving section, LG middle...Block logic section, IN...
ΦCheck-in relay V-1OUT-・e・Check-out relay, 1・2TI)l'...Relay (first logic element), FBCR...Relay (second logic element), 2 fist I PSR... ...Sv-(3rd logical cue), 2TR・
...Relay (block relay). 15- 247-

Claims (1)

[Claims] A check-in transmitter that transmits a check-in signal through an antenna provided at one end and the other end of the vehicle, a check-in transmitter that transmits a check-in signal through the antenna at the middle front part, and a check-in signal through the antenna at the middle rear part. a check-out transmitter for transmitting an out 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 and over the entire area within the vehicle path, and a check-in receiver provided for each section for detecting the check-in signal p and check-out signal received by the loop. A vehicle detection device includes a block logic section that detects the presence of the vehicle based on detection outputs of the check-in receiver and the check-out receiver in both adjacent sections. and a first theory f! that detects that the front part of the vehicle enters the second section in the second section. T! When the front part of the vehicle enters the second section and the forward direction of the vehicle is changed, a check-out signal is transmitted from the front part of the vehicle and a check-in signal is transmitted from the rear part of the vehicle. a second logic element that detects that the vehicle is traveling according to the state in which the direction of travel has been switched;
A vehicle detection device characterized in that the blockage logic section is provided with a third logic element that detects that the vehicle has completely retreated to the first section and releases the blockage state of the second section.