JPS6211702B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION When a vehicle having insulating wheels such as rubber tires moves along a predetermined path, the presence of the vehicle is detected in each section formed by dividing the path. This invention relates to a vehicle detection device that blocks a section into which a following vehicle cannot enter.

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 to the signal receiver disappears, so this is detected by the signal receiver, and the corresponding signal is detected based on this detection power. A section of the track was being blocked.

Therefore, when a vehicle enters a track section and then retreats from the track section, the bypass of the signal current through the axle disappears, and the flow of the signal current to the signal receiver is restored. , the blockage condition is immediately released and vehicles are allowed to re-enter the track section.

Therefore, according to conventional vehicle detection means that utilizes axle short circuit, even if a vehicle enters a track section further ahead due to overrunning from the track section where it is stopped at a station, etc., it will not be able to reach the front track by backing up. The blockage condition in the section was immediately lifted and did not cause any problems.

However, in vehicles using insulated wheels such as rubber tires, short circuits cannot be caused by the axle, making it impossible to realize a vehicle detection means with the above-mentioned function. ``Vehicle detection device'' (patent application filed in 1983)
−85077 (Special Publication No. 52019 of 1983), Patent Application No. 1983-
154465 (Special Publication No. 52020 of 1983), Patent Application 1983-
120396 (Japanese Unexamined Patent Publication No. 58-21135)), etc. have been proposed.

However, in both of these, a check-in transmitter and a check-out transmitter are individually installed on the vehicle, and a check-in signal is transmitted from an antenna installed at the front of the vehicle, and a check-in signal is transmitted from an antenna installed at the rear of the vehicle. A check-out signal is transmitted from the antenna, and a receiver for the check-in signal and a receiver for the check-out are provided in response to this, and a group of relays is used to respond to the detection force of these signals. Since the block logic section is configured to achieve the same function as vehicle detection due to an axle short circuit, two separate transmitters are required for each vehicle, and the circuit configuration of the block logic section becomes complicated. is occurring.

The purpose of the present invention is to fundamentally solve the above-mentioned problems in the prior art, by making the on-vehicle transmitter a single one, thereby transmitting the same and in-phase signals from the antennas installed in the front and rear parts of the vehicle. By transmitting on-vehicle signals, an extremely effective vehicle detection device is provided which reduces the number of on-vehicle transmitters and greatly simplifies the configuration of the block logic section.

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. An antenna ANT ₁ for transmitting on-board signals and an automatic train train (ATC) are installed at the lower front of the vehicle V.
Control.) An antenna ANT ₂ for receiving signals is provided, and an antenna ANT ₃ for transmitting on-board signals and an antenna ANT ₄ for receiving ATC signals are provided at the lower rear of the vehicle V.

However, antennas ANT ₁ and ANT ₃ are simultaneously supplied with on-vehicle signals of specific frequencies from a common on-board transmitter TXv, and antennas ANT ₁ and ANT ₃ transmit on-board signals with each other being in phase. It has become something to do.

In addition, in the passage R of the vehicle V facing the antennas ANT ₁ to _{ANT 4} , a loop antenna-like section loop L is provided for each section and over the entire area. ₁ , it receives the onboard signal from ANT ₃ and also transmits the ATC signal, and this section loop L
, the detection receiver RXd and the ATC transmitter TXa are matching transformers MT ₁ , MT ₂ and a three-turn transformer.
Connected via HYB.

The detection receiving unit RXd is composed of a suppression receiver RX ₁ and an on-board signal receiver RX ₂ , and these detect the superposition of a reference signal and an on-board signal, which will be described later, and detect only the on-board signal. Terriki Ds
is given to the block logic section LG.

Note that the detection receiving section RXd and the ATC transmitting section TXa
is provided for each section, and the detection power Dc of the adjacent section is also given to the similarly provided block logic section LG, which determines the section block state using the logic structure described later and sends it to the ATC transmitter TXa. Give commands and transmit the same
When a stop signal is sent from TXa and this stop signal is received by the ATC receivers RX _a1 and RX _a2 of the vehicle V, a display to that effect is displayed on the in-vehicle signal devices SD ₁ and SD ₂ , and this information is sent to the logic The signal is applied to devices LE ₁ and LE ₂ to control brake operations, etc.

In addition, to ensure safety, in order to detect failures in section loop L or detection receiver RXd, a reference signal having a frequency different from the on-board signal from reference signal transmitter TXr is sent to matching transformers MT ₃ and MT ₄ . The signal is sent to the section loop L via the signal line L, and is constantly received by the suppression receiver _RX1 .

FIG. 2 is a block diagram showing details of the suppression receiver RX ₁ , in which the reference signal selected by the bandpass filter BPF ₁ is amplified by the voltage amplifier VA, subjected to amplitude limitation in the limiter LM, and then detected. After envelope wave detection is performed by the detector DT, the low frequency of the envelope component is extracted by the bandpass filter BPF ₂ , which drives the Schmitt trigger SCH to become a square wave, which is then amplified by the power amplifier PA. is,
It becomes direct current through transformer T and rectifier RE,
Relay ING is operating.

FIG. 3 shows the state of superimposition detection of the reference signal and the on-vehicle signal, and the signal waveforms of each part are appended.

In other words, the reference signal (Sr) is an intermittent wave obtained by modulating the amplitude of the carrier wave with a square wave.If this is limited to the amplitude VC by the limiter LM and then envelope detection is performed, it becomes a pulse-like wave with an amplitude of VC/2. This becomes a signal, and by extracting a square wave component from this using the bandpass filter BPF ₂ and driving the Schmitt trigger SCH, a square wave with a pulse width corresponding to the threshold level SL can be obtained.

In this state, when the on-board signal (Sv) containing only the carrier wave is mixed, the modulation degree of the square wave with respect to the carrier wave apparently decreases and the maximum amplitude increases, as shown as (Sr + Sv). When the limiter LM limits the amplitude to VC, the square wave component decreases and the output of band wave filter BPF ₂ becomes Schmitt.
The threshold level SL of the trigger SCH is not reached and no square wave appears in its output.

Therefore, the relay ING shown in Fig. 2 operates when only the check signal (Sr) is given, and recovers when the check-in signal (Sv) is superimposed on it, thereby preventing the vehicle V from entering. can be detected, and it is also restored even if the reference signal (Sr) is disconnected, and the same state as the entry of the vehicle V is detected.

The on-board signal receiver RX ₂ only needs to receive on-board signals and operate the relay INT in response to the detection of the on-board signals. By adding a container, the second
A configuration substantially similar to that shown in the figure can be applied.

FIG. 4 shows mutually adjacent sections 1T and 2T as paths for vehicle V, and relays 1T _INT and 2 for each section 1T and 2T according to the position of vehicle V.
The timing chart shows the situation in which T _ING and 2T _INT operate or recover according to the detection power of the onboard signal receiver RX ₂ and the suppression receiver RX ₁ in each section 1T and 2T, and H is motion,
L indicates recovery.

That is, when a vehicle V exists in section 1T, relay 1T _INT of onboard signal receiver RX ₂ in section 1T is in operation due to the onboard signal, and relay 2T of suppression receiver RX ₁ in section 2T is in operation. _ING operates according to the inspection signal, and if the vehicle V enters the state, the onboard signal will be received even in section 2T, so relay 2T _ING will be restored, but on the other hand, the onboard signal receiver RX ₂ will be activated. When the relay 2T _INT operates and the vehicle V completely enters the section 2T, the on-board signal in the section 1T disappears and the relay 1T _INT is restored.

In addition, when vehicle V enters section 2T due to overrunning, etc., if it goes backwards, relay 1T _INT will operate again, and if it goes further backwards, relay 2T _ING will also operate. Relay 2T _I
NT will be restored.

Figure 5 shows the above relays 1T _INT , 2T _ING , 2
The operation and restoration of T _INT and the operation of the relay 3T _INT of the onboard signal receiver RX ₂ in the section 3T adjacent to the front of the section 2T are shown in the circuit diagram of the block logic unit LG that performs block control based on the recovery. , a case where it is configured by relays is illustrated.

In the figure, when there is no vehicle V in sections 1T and 2T, the operating contact 2T _IN serves as the first contact.
_G1 is closed, and the recovery contact 2T _INT1 as the second contact connected in series with it is also closed, and these are both in the closed state, but they are connected in parallel to each other and each contact Both operating contacts 1T _{INT1 and} 3T INT in both adjacent sections 1T and 3T, which are the third and fourth contacts connected in series with 2T _ING1 and 2T _INT1 , are restored in the initial state where the vehicle V does not exist. As it is, each contact point 1
Since relay 2TR, which has operating contact _2TR1 for self-holding connected in parallel with T _INT1 and 3T _INT , is not operated, preset switch PS is temporarily turned on, relay 2TR is operated, and it is closed according to the operation. Self-holding is achieved by the contact point _2TR1 .

In this state, if the vehicle V is in the or and state, first, the contact 2T _ING1 is
In response to the detection force of the suppression receiver RX ₁ at T, the contact 2T _INT1 also opens in the same section 2.
In response to the detection force of the on-board signal receiver RX ₂ at T, the relay 2TR is restored, and the same holds true in the state of , resulting in the state of .
Contacts 2T _ING1 and 2T _INT1 are closed, and contact 1T _INT is connected to the on-board signal receiver RX ₂ in section 1T.
By closing in response to the detected force, the relay 2TR operates again, and self-holding is performed by the contact _2TR1 .

Therefore, if the vehicle V exists, even partially, within the section 2T, the relay 2TR is restored by control via the circuit by each contact, and if the vehicle V does not exist completely within the section 2T, the relay 2TR operates. Therefore, with this recovery contact 2TR ₂ ,
It is possible to instruct the ATC transmitter TXa to close section 2T.

Therefore, if vehicle V enters section 2T,
Section 2T is once blocked, but when vehicle V escapes from section 2T by reversing, the blockage of section 2T is released. Therefore, when vehicle V enters section 2T due to overrunning, etc., the purpose of stopping position correction is Therefore, even if the vehicle retreats to section 1T, re-entering section 2T is allowed, and the same result as vehicle detection due to an axle short circuit can be obtained.

Furthermore, when the vehicle V advances to the front section 3T, the on-board signal receiver RX ₃ of the same section 3T generates a detection force, and in response, the contact 3T _INT closes, so the operation of the relay 2TR is stopped. As a result, the block state in section 2T is released.

In addition, the configuration shown in Figure 5 may use a relay circuit made of highly reliable semiconductors, and the forms of the inspection signal, onboard signal, etc. can be arbitrarily selected depending on the conditions. However, the suppression receiver
The present invention can be modified in various ways, such as by simply determining the configurations of RX ₁ and on-vehicle signal receiving section RX ₂ .

As is clear from the above description, according to the present invention, even in a vehicle using insulated wheels, vehicle detection, which has exactly the same function as the vehicle detection means using an axle short circuit, can be performed reliably and accurately with a simple configuration. Great effects can be obtained in new transportation systems using rubber tires.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, in which Figure 1 is a block diagram of the entire configuration, Figure 2 is a block diagram of a suppression receiver,
Figure 3 is a waveform diagram showing the detection status of the reference signal and on-board signal, and Figure 4 is a timing chart showing the situation in which the relay of the suppression receiver and the relay of the on-board signal receiver operate or recover depending on the position of the vehicle. Chart,
FIG. 5 is a circuit diagram of the block logic section. V...Vehicle, TXv...Onboard transmitter, TXr...Reference signal transmitter, ANT ₁ , ANT ₃ ...Antenna, L
...Interval loop, RX ₁ ...Suppression receiver, RX ₂ ...
On-board signal receiver, LG...Block logic section, ING,
INT, 2TR...Relay, 2T _ING1 ...1st contact, 2T _INT1 ...2nd contact, 1T _INT1 ...3rd contact, 3T _INT1 ...4th contact, 2TR ₁ ...Self contact.

Claims (1)

[Claims] 1. An on-board signal transmitting antenna that transmits mutually in-phase signals to the front and rear parts of the vehicle, an on-board transmitter that simultaneously supplies signals to each of the antennas, and each of the above-mentioned antennas. a section loop provided oppositely to the vehicle passage for each section and over the entire section; a reference signal transmitter that supplies a reference signal to the loop; A suppression receiver provided in each section detects superimposition with a reference signal, and an onboard signal receiver provided in each section detects only the onboard signal received by the loop. Also, a first contact that opens in response to the detection force of the suppression receiver in the second section of the adjacent first and second sections, and a detection point of the on-board signal receiver in the second section. a second contact connected in series with the first contact that opens in response to a force; and the first and second contacts that close in response to a force detected by the on-board signal receiver in the first section. a third contact connected in series with the contact; and a third contact connected in series with the contact;
a fourth contact connected in parallel with the third contact that closes in response to the detection force of the on-board signal receiver in a third section adjacent to the front of the section; and a fourth contact connected in parallel with the fourth contact. The vehicle has a self-contact for maintaining operation that closes in accordance with the operation of the vehicle, and is controlled via a circuit formed by each of the contacts, and is restored when the vehicle is present in the second section to close the second section. A vehicle detection device characterized in that a block logic section comprising a relay is provided for each section.