JPS6052019B2 - Vehicle detection device - Google Patents

Description

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

Conventionally, railway vehicle detection has utilized an electrical short circuit between the rails caused by an axle, in which a signal current is passed between both rails in a rail section formed by insulating the rails, and this signal current is transmitted 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, if 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 the conventional vehicle detection means using axle short circuit,
Even if a vehicle enters a track section further ahead due to overrunning from the track section where it is parked at a station, etc., the blocked state of the said track section will be immediately released by reversing, and there will be no problem. Nakatsuta.

However, in vehicles using insulated wheels such as rubber tires,
It has been impossible to perform a short circuit through the axle, and it has become impossible to realize a vehicle detection means having the above-mentioned function. The present invention aims to solve these problems at once, and is an extremely convenient method that can detect vehicles using insulated wheels with the same function as a vehicle detection means using an axle short circuit. , which provides a vehicle detection device.

Therefore, in order to achieve this object, the present invention includes an antenna for transmitting a check-in signal provided at the front part of the vehicle, a check-in transmitter for supplying the check-in signal to the antenna, and a check-in transmitter provided at the rear part of the vehicle. An antenna for transmitting a checkout signal provided in the section, a checkout transmitter that supplies the checkout signal to the antenna, and a checkout transmitter that supplies the checkout signal to the antenna, and a checkout transmitter that is arranged opposite to each antenna to the vehicle passage for each section and over the entire area within the section. A section loop provided, a check-in receiving section and a check-out receiving section provided for each section that detect check-in signals and check-out signals received by this loop, and check-in receiving sections and check-out receiving sections in both adjacent sections. In a vehicle detection device that includes a blockage logic section that sets a section into which the vehicle has entered into a blockage state based on the detection power of a checkout receiving section, and then releases the blockage state when the vehicle retreats from this section, When the respective detection forces of the check-in receiving section and the check-out receiving section in the first section of the first and second sections occur simultaneously, the system responds and maintains itself and detects that the vehicle has completely entered the first section. 1st to detect
After the first relay responds, the detection force of the check-in receiving section in the first section disappears and the detecting force of the check-out receiving section is generated, and the detection force of the check-in receiving section in the second section disappears. a second relay that performs self-holding in response to a force generated and detects a state in which the vehicle straddles the first and second sections, and a check-in receiving section and a check-in section in the first section after the second relay responds. When the respective detection forces of the out-receiving section occur simultaneously and the detection force of the check-in receiving section in the second section disappears, the vehicle responds to self-holding and escapes from the second section to the first section by retreating. a third relay that detects the
When the respective detection forces of the check-in receiving section and the check-out receiving section in the second section are in the extinguished state, self-holding is performed and the second section is set in the block release state, and the detection force of the check-in receiving section in the second section is generated. When the self-holding is released, the second section is in the blocked state, the detection state of the first relay is released, and the detection forces of the check-in receiving section and the check-out receiving section in the second section are in the state of disappearance, and the third relay is in the state of being blocked. A block logic section is constituted by a block relay that performs self-holding when in the detection state, brings the second section into the block release state, and releases the detection states of the second and third relays.

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

FIG. 1 is a block diagram showing the entire configuration. In this case, an antenna ANTl for transmitting a check-in signal and an ATC (A
utOmaticTrainCONtr″01.) An antenna ANT2 for signal reception is provided, and an antenna ANT2 for transmitting checkout signals is provided at the lower rear of the vehicle.
3 and an antenna ANT4 for receiving ATC signals.

However, since the switches Sl and S2 of the antennas ANTl and ANT3 are changed according to the change in the traveling direction of the vehicle, the check-in transmitter T that supplies the check-in signal
Xil, TXi2 and checkout transmitters TXOl, TXO2 that supply checkout signals are switched and connected, and a check-in signal is supplied when the side is in the forward direction, but a checkout signal is supplied when the side is on the opposite side to the forward direction. A signal is supplied.

In addition, in the passage R of the vehicle V facing the antennas ANTl to ANT4, a loop antenna-like section loop L is provided for each section and over the entire section, so that the antennas, ANT, , receives the check-in signal and check-out signal from the ANT3, and also receives the check-in signal and the check-out signal from the AT3.
This section loop L, the detection receiving section RXd, and the ATC transmitting section TXa are configured to transmit the C signal.
are connected via.

The detection reception signal Xd is composed of a check-in reception section RXi and a check-out reception signal XO, which detect check-in signals and check-out signals, and give these detection forces Ds to the blocking logic section country. ing.

Note that the detection receiving section RXd and the ATC transmitting section TXa are as follows:
It is provided for each section, and the block logic section is also given the detection power of the adjacent section, which judges the section block state according to the logic configuration described later, gives a command to the ATC transmitter TXa, and sends a command to the ATC transmitter TXa. When a stop signal is sent from TXa and this stop signal is received by the ATC receivers RXal and RXa2 of the vehicle V, a display to that effect is displayed on the in-vehicle signal devices SDl and SD2, and this information is sent to the logic devices LEl and LE2.
It is designed to control brake operations, etc.

In addition, for safety reasons, section loop L to detection receiving section R
In order to detect a fault in
is constantly receiving data.

FIG. 2 is a block diagram showing the configuration of the check-in receiver mλXi.
Two Xil and RXi2 are installed in parallel, and the relays FSJl and IN2 are normally activated by detecting the check signal, and as described later, when the check-in signal from the vehicle ■ is given, the detection force disappears. Relay 1N11N2
When both are restored, the relay 1N as a check-in relay is restored by opening the contacts 1N1 and IN2, and its contact output indicates the detection of the check-in signal. FIG. 3 is a block diagram showing details of the check-in reception signal Xil, in which the reference signal selected by the bandpass filter BPFl is amplified by the voltage amplifier VA and subjected to amplitude limitation in the limiter LM. , detector DT
After envelope detection is performed by
The low frequency of the envelope component is extracted by
After the trigger SCH is driven to become a square wave, it is amplified by the power amplifier PA, becomes a direct current through the transformer T and the rectifier RE, and operates the relay 1N1.

Note that the check-in reception mλXi2 has a similar configuration.

FIG. 4 shows the detection status of the verification signal and the check-in signal, taking the check-in reception mλXil as an example, and showing the signal waveforms of each part.

That is, the reference signal Sr is an intermittent wave obtained by amplitude modulating the carrier wave with a square wave, and if this is limited to the amplitude VC by the limiter LM and then envelope detection is performed, a pulse of amplitude C/2 is obtained. It becomes a signal like this, and from now on, the band
By extracting the square wave component using PF2 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 check-in signal Si 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+Si), and the maximum amplitude increases.・Amplitude VC by LM
, the square wave component is reduced and the bandpass filter BPF
2 does not reach the threshold level SL of the Schmitt trigger SCH, and no square wave appears in its output.

Therefore, the relays 1N1 and ISJ2 in FIG. 2 operate when only the check signal Sr is given, and recover when the check-in signal Si is mixed therewith.
As a result, it is possible to detect the entry of the vehicle (2), and even when the inspection signal Sr is disconnected, the state is restored, and the same state as the entry of the vehicle (2) is detected. Further, the checkout signal uses a carrier wave having a frequency different from that of the checkin signal, which is amplitude-modulated by a predetermined low frequency signal, and the checkout receiver RXO has a configuration substantially similar to that shown in FIG. Detection is performed by

Fig. 5 shows a stopping section 1T as a first section corresponding to the station platform PF and a section 2T as a second section adjacent thereto as a path for vehicle ■, and as the vehicle , relays 1T, N, 2T0N1 in the check-in reception cloth A Xi of each section 1T, 2T, and
Checkout receiver RXO relays 1T0uT, 2T
The situation in which 0uτ operates or recovers is displayed as a time chart, where H indicates operation and L indicates recovery.

In other words, relay 1T for section 1T! N1 and section 2T
Relay 2TIN is always activated by the reference signal,
When vehicle V enters section 1T and becomes in state 1, the check-in signal activates relay 1T! When N is restored and the vehicle V further advances to state 2, relay 1T0uT is activated by the checkout signal. In addition, if vehicle V enters section 2T due to overrunning etc. and enters the state 3, relays 2T and N are restored by the check-in signal and the vehicle V enters section 1T.
Since the check-in signal cannot be received, relay 1T! N works.

Next, in order to correct overrunning, etc., vehicle ■ retreats from section 2T to section 1T and returns to state 4, then returns to state 2 again.
Relay 1T! When TIN is restored, relay 2TIN becomes operational.

In this case, since the vehicle V does not completely enter the section 2T, the relay 2T0uT maintains the restored state.

Figure 6 shows the above relay 1T! N,lTOuT,2Tl
This is a circuit diagram of a block logic section that performs block control based on the operation and recovery of N, 2TOUT and the operation and recovery of similar relay 3T0vT and block relay 3'IR in section 3T adjacent to section 2T. An example of the configuration is shown below.

In Fig. 6, relay 2゛m is always in operation, detects when vehicle V enters section 2T, restores the vehicle, and closes recovery contact 2TR5 to switch to section 2T (7) AT.
An instruction is given to the C transmitter TXa to transition to a blocking state in which the following vehicle is prevented from entering section 2T.

However, in the circuit of relay 2TR, relay 2TR as a block relay in section 2T and adjacent section 3T
Recovery contact 3TR6 of relay 3TR corresponding to relay 3TR and operation contact 3T00T5 of checkout relay 3T0uT corresponding to relays 1T0u and 2T0uτ are inserted to ensure operation. In the initial state, contact 3T0UT5 is activated during recovery of relay 3T0uτ. Open, relay 2T
Since the circuit R is not configured, the power supply B is applied using a non-locking preset switch circle, and the relay 2゛m is forced to operate, and the operating contact 2T is closed! It is necessary to perform self-holding and presetting using N3, recovery contact 2T0UT5, and own operating contact 2TR4.

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

When relay 2TR is in operation, if it passes through the state shown in FIG. 5 1 and then changes to state 2, relay 1T! N restoration and relay 1T0uT
Due to the operation of , recovery contact 1T0N1 and operation contact 1
T0UT1 closes, and as a result, relay 1T0KR as the first relay responds and operates, and then performs self-holding with its own operating contact 1T0KR1 and the closed operating contact 2TR1, and vehicle V moves to section 1T. completely enter,
It is detected and stored that the check-in signal and check-out signal are reliably sent.

Next, due to overrunning, etc., vehicle 2 enters section 2T and reaches the state shown in Fig. 5, where it straddles sections 1T and 2T, and relay 1T! When N operates again, relay 2TIN is restored, so relays 1 and 2T0N as the second relay are closed by closing operating contact 1TIN2 and recovery contact 2TIN1 via operating contact 1T0KR2 and operating contact 1T0UT2, which are currently closed. It operates in response and detects this condition.

In addition, at this time, relay 2T! Contact 2T due to restoration of N
, N3 are opened, relay 2TR is restored, and by closing its contact 2゛M5, a block command is given to the ATC transmitter TXa, and the recovery contact 2TR2 is closed, making the self-operating contact of relays 1 and 2T0N. 1・2T! Complete the self-holding circuit with N1, and relay 1/2T! By self-holding N, the fact that vehicle (2) straddles sections 1T and 2T and is transmitting a check-in signal to section 2T is memorized.

On the other hand, since the contact 2TR1 is opened due to the restoration of the relay 2TR, the relay 1T0KR is restored and the detection state is canceled.

Additionally, if vehicle ■ retreats to section 1T and enters the state of section 5 (4), relays 1T and N are restored, and relay 2
T and N are operating and operating contacts Y and 2T are closing! Recovery contacts 1T, N3 via N2 and operation contact 1T0uτ3
By closing operating contacts 2T and N2, relays 2 and 1PSR as third relays are operated in response, and it is detected that vehicle V has retreated into section 1T.

Then, due to the closing of operating contacts 2 and 1PSR2, section 2
Contacts 2T, N which are closed due to the absence of a vehicle at T
The operating circuit is completed through 3 and 2T0u, 5, and this operates the relay 2TR to release the blockage.The self-holding is performed by the self-contact 2TR4, and by opening the contact 2TR5, the ATC transmitter Since the TXa is commanded to release the blockage, the vehicle V can re-enter the section 2T. In addition, due to the re-operation of relay 2TR, recovery contacts relay 2TR2 and relay 2TR3 are opened, and relays 1 and 2T! N and 2.1 PSR are restored, the detection state is released, and the state returns to the initial state.

In other words, when vehicle ■ enters section 2T, section 2T is once blocked, but when vehicle ■ escapes from section 2T by retreating, section 2T is unblocked.
Even if vehicle V enters section 2T due to overrunning, etc. and then retreats to section 1T for the purpose of correcting the stopping position, it will be allowed to re-enter section 2T, and the result will be the same as when a vehicle is detected due to an axle short circuit. is obtained.

In addition, the configuration shown in FIG. 6 may use a highly reliable semiconductor logic circuit, and the forms of the verification signal, check-in signal, check-out signal, etc. can be arbitrarily selected depending on the conditions. Accordingly, the check-in receiving section R
The present invention can be modified in various ways, such as by determining the configuration of Xi checkout reception and XO.

As is clear from the above explanation, according to the present invention, even in vehicles 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. Great effects can be obtained in transportation systems, etc.

[Brief explanation of drawings]

The figures show an embodiment of the present invention, in which Fig. 1 is a block diagram of the entire configuration, Fig. 2 is a block diagram of the check-in receiver, Fig. 3 is a block diagram of the check-in receiver, and Fig. 4 is a check signal and a waveform diagram showing the detection status of the check-in signal, No. 5
The figure is a time chart showing a situation in which the relay of the check-in receiving section and the relay of the check-out receiving section operate or restore depending on the position of the vehicle, and FIG. 6 is a circuit diagram of the block logic section. V...Vehicle, TXil, TXi2...
Check-in transmitter, TXOl, TXO2...
Checkout transmitter, ANTl, ANT3...
・Antenna, L... section rape, RXi...
... Check-in receiving section, RXO... Check-out receiving section, LG... Block logic section, IN
...Check-in relay, 0UT...Check-out relay, 1T0KR...1st relay, 1/2T! N1...2nd relay, 2.1P
SR...Third relay, 2TR...Block relay, 1T0N1, 1T1N3, 2T0N192T
R292TR392T0uτ593TR611 recovery contact ~1T0UT191T0KR192TR191T0KR
291T0UT291T! N29lT2T! Nl9lR
2T! N29lTOUT392TIN292lPSRl
92T! N39π.

Claims (1)

[Claims] 1. An antenna for transmitting a check-in signal provided at the front part of the vehicle, a check-in transmitter for supplying the check-in signal from the antenna, and an antenna for transmitting a check-out signal provided at the rear part of the vehicle. , a checkout transmitter for supplying the checkout signal to the antenna; a section loop provided in the path of the vehicle in each section and over the entire area within the section opposite to each of the antennas; A check-in receiving section and a check-out receiving section provided for each section detect the received check-in signal and check-out signal, and detection of the check-in receiving section and check-out receiving section in both adjacent sections. A vehicle detecting device includes a block logic section that sets a section into which the vehicle has entered into a block state based on a force, and releases the block state when the vehicle retreats from the section. When the respective detection forces of the check-in receiving section and the check-out receiving section occur simultaneously in the first section of the two sections, the device responds and maintains itself and detects that the vehicle has completely entered the first section. a first relay, and after the response of the first relay, the detection force of the check-in receiving section in the first section disappears and the detection force of the check-out receiving section is generated, and the detection force in the second section is a second relay that responds to the detection force of the check-in receiving unit and performs self-holding to detect a state in which the vehicle straddles the first and second sections; and after the second relay responds; When the detection forces of the check-in receiving section and the check-out receiving section in the first section occur simultaneously and the detection force of the check-in receiving section in the second section disappears, self-holding is performed in response to the above-mentioned a third relay that detects that the vehicle has retreated from the second section to the first section; and when the respective detection forces of the check-in receiving section and the check-out receiving section in the second section are in a state of extinction. Self-holding is performed and the second section is set to a block release state, and when a detection force of the check-in receiving section in the second section is generated, self-holding is released and the second section is set to the blockage state and the first relay is set to a detection state. is released, and when each detection force of the check-in receiving section and the check-out receiving section in the second section is in the disappearing state and the third relay is in the detecting state, self-holding is performed and the second section is brought into the unblocked state. The vehicle detection device is characterized in that the block logic section includes a block relay that releases the detection states of the second and third relays.