JPS6134624B2 - - Google Patents

Description

[Detailed Description of the Invention] This invention utilizes a circuit that detects the wheels of a train running on the rails by shielding the magnetic flux between the transmitting coil and the receiving coil, which are placed between the rails. The present invention relates to a wheel movement direction detecting device configured as described above, and the purpose is to simplify and reduce the cost of an axle counter type train detecting device by realizing this device.

In order to prevent accidents such as head-on collisions and rear-end collisions of vehicles on railways where trains and other vehicles operate, various signal safety devices are installed in an effort to ensure safety. Conventional signal safety equipment includes automatic blocking devices using various track circuits in addition to track circuits using commercial frequencies.
Check-in/check-out type blocking device,
Ticket blocking devices, continuous blocking devices, etc. are used.

However, in order to simplify the block device and reduce its cost, a block device using a wheel detection device is required, and its realization has been desired. The present invention has developed a wheel direction detection device using a wheel detection device that can meet such needs, and by using this in an axle counter type train detection device,
This realizes the above request.

Therefore, the wheel detection device used in the present invention has the following features:
JP-A-Sho, a patent application filed by the same applicant as the present invention.
Publication No. 55-93078 relates to a "wheel detector," and the direction detection device of the present invention detects three types of wheels that are generated when the magnetic flux between the transmitting coil and the receiving coil of the "wheel detector" is blocked by the wheels. The direction of movement of the wheels is detected by utilizing the phenomenon that the order of occurrence of detection ranges differs depending on the direction of movement of the wheels.

Therefore, in describing the embodiments of the present invention, an outline of the wheel detection device described above will be described as a premise.
Figure 1 A and B show the rail 2 on which the train wheels 1 run.
FIG. 2 is an explanatory diagram showing an outline of the above-mentioned wheel detection device in which a transmitting coil 3 is arranged on one side and receiving coils 4 and 5 are arranged on the opposite side. That is, the transmitting coil 3 is driven at the oscillation frequency of the oscillator 7 connected via the amplifier 6. In addition, the receiving coil 4 or 5 includes band filters 8 and 9, amplifiers 10 and 11, level determiners 12 and 13, and a rectifier, respectively, as shown in the figure.
D ₁ , D ₂ , and wheel detection output relays C ₁ R and C ₂ R are connected.

In the wheel detection device having the above configuration, when the wheel 1 is not near the transmitting coil 3 and the receiving coils 4, 5, the receiving coils 4, 5 are connected to the magnetic flux φ ₁ or φ generated by the receiving coil 3 shown in FIG. 1A or B. ₂ generates an induced voltage, and these voltages pass through bandpass filters (hereinafter abbreviated as BPF) 8 and 9, and are amplified by amplifiers 10 and 11 to reach the threshold of level determiners 12 and 13. Beyond the value level, relay
C ₁ R and C ₂ R are operated respectively.

Next, the operation of the detection device when the wheel 1 moves on the rail 2 in the direction of the arrow, that is, from left to right, will be described. When the wheel 1 approaches the receiving coil 4,
The magnetic flux φ ₁ being supplied from the transmitting coil 3 to the receiving coil 4 is shielded by the wheel 1 and reduced, and the output voltage of the receiving coil 4 becomes below the threshold level of the level determiner 12, and the output voltage to the relay C ₁ R is reduced. The output is cut off and relay C ₁ R is restored. When the wheel 1 further continues to move and approaches the receiving coils 4 to 5, the magnetic fluxes φ ₁ and φ ₂ are shielded by the wheel 1 and decrease.
Since the output voltage of the receiving coil 5 also falls below the threshold level of the level determiner 13, the relay C ₂ R is also restored following the restoration of the relay C ₁ R.

When the wheel 1 continues to move away from the receiving coil 4, the magnetic flux φ ₁ is no longer screened, and the output voltage of the receiving coil 4 and amplifier 10 increases and exceeds the threshold of the level determiner 12, Relay C ₁ R
is excited and operates. Finally, when the wheel 1 moves away from the receiving coils 4 and 5 to the right, both the magnetic fluxes φ ₁ and φ ₂ are unshielded, and the output voltages of the receiving coils 4, 5 and the amplifiers 10, 11 increase. , exceeds the threshold level of the level determiners 12 and 13, and the relays C ₁ R and C ₂ R are respectively excited and operated.

As mentioned above, the relay accompanying the movement of the wheel 1
The operation of C ₁ R and C ₂ R is illustrated in Figure 2 a or b.
The wheel detection range A, unique to each relay, is as follows.
It can be seen that the wheel detection device has three detection ranges: a wheel detection range C that is common to B and relays C ₁ R and C ₂ R. In other words, a in the same figure is a relay.
In C ₁ R, b is a time chart showing the operating status of each relay C ₂ R, and c is _a time chart showing the operation status of relay C ₁ R and relay C ₂ R.
This is a time chart in which B indicates the time period for operation and relay C ₂ R restoration, and C indicates the time period for both relays to be restored. As shown in Figures a and b, if the wheel movement direction is from left to right, relay C ₁ R → C ₂ R is restored, and if the wheel is moving from right to left, relay C ₂ R → C ₁ R is restored. Then, in c of the same figure, A is the wheel detection range unique to relay C ₁ R, B is the wheel detection range unique to relay C ₂ R, and C is the wheel detection range common to relays C ₁ R and C ₂ R. It shows.

As described above, the present invention provides wheel detection output relay C ₁ R,
By using the difference in recovery and operation order depending on the wheel movement direction of C ₂ R, and by recovering the direction detection relay related to the operating status of relays C ₁ R and C ₂ R and obtaining a detection output, it is possible to determine the wheel movement direction. It is designed to determine.

Embodiments of the above invention will be described below with reference to the drawings. FIGS. 3 and 4 are circuit diagrams showing embodiments of the direction detection device according to the invention, FIG. 3 is a circuit diagram for right direction detection, and FIG. is a circuit diagram of left direction detection. CRmR in Figure 3 is a right direction memory relay, TDC-
R indicates the right direction detection output relay, CLmR in Figure 4 indicates the left direction memory relay, and TDC-L indicates the left direction detection output relay. All of these relays are in an operating state during normal times when no wheels are being detected. . In the following, the contact points in each circuit are shown by adding a number in parentheses to the symbol of the relay to which the contact belongs.

First, the operation of the circuit shown in FIG. 3 when the wheel 1 shown in FIG. 1 moves from left to right will be explained. When the wheel detection output relay C ₁ R of the wheel detection device is restored in the section of the wheel detection range A shown in Fig. 2, the operating contact C ₁ R1 in the excitation circuit of the relay CRmR shown in Fig. 3 is opened, so that the relay CRmR is Excitation is cut off and restored. When the wheel 1 moves further to the wheel detection range C in Fig. 2 and the wheel detection output relay C ₂ R is also restored, the contacts C ₂ R2 and CRmR2 of the right direction detection output relay TDC-R are both open. Therefore, the operating state is maintained only at the recovery contact C ₁ R2. When wheel 1 continues to move and reaches wheel detection range B, relay C ₁ R is activated.
operates and the recovery contact C ₁ R2 is opened, so that all excitation circuits of the right direction detection output relay TDC-R are cut off and the recovery is restored. In this way, it is possible to detect that the wheel 1 has moved from left to right by restoring relay TDC-R. When wheel 1 passes through wheel detection range B, the relay
C ₁ R and C ₂ R operate together, relay CRmR, TDC
- Operate R and return to normal state.

Next, we will describe the circuit operation in Fig. 3 when the wheel 1 moves from right to left in Fig. 1. In this case, relay C ₂ R is first activated in the section of wheel detection range B.
is restored, and relay CRmR is supplied with power via its restoration contact C ₂ R1 and the self-holding contact CRmR1 of relay CRmR, so even if relay C ₁ R is restored next in the wheel detection range C, Relay CRmR does not recover. Therefore, since the relay TDC-R, which is excited via the operating contact CRmR2, also remains in operation, no direction detection output is generated. When wheel 1 moves further to the left and relay C ₂ R operates in wheel detection range A, recovery contact C ₂ R1, which made up the power supply circuit of relay CRmR, opens and the excitation circuit is cut off. Therefore, relay CRmR is restored and the operating contact
The excitation circuit of relay TDC-R via CRmR2 is cut off, but at this time, the excitation circuit via recovery contact C ₁ R2 of wheel detection output relay C ₂ R has already been configured, and furthermore, the excitation circuit via wheel detection output relay C ₂ R is configured. Since the excitation circuit via contact _C2R2 is configured by the operation of R, the right direction detection output relay TDC-R remains in the operating state and no direction detection output is generated. When the wheel 1 continues to move to the left and exits the wheel detection range A, the wheel detection output relay C ₁ R also operates and returns to normal.

In this way, the right direction detection output relay TDC-R does not recover for wheel 1 moving from right to left, but only recovers and detects wheel 1 moving from left to right as described above. Since it generates an output, the direction of movement of the wheels can be determined. Similarly, the left direction detection circuit shown in FIG. 4 can detect the direction of wheels moving from right to left.

The wheel detection device needs to determine the presence or absence of a train by counting the direction and number of passing wheels.
Furthermore, it is necessary to accurately detect wheels and determine the direction of the wheels from zero train speed to the maximum speed in the section. In particular, it is necessary to accurately determine the direction and number of wheels that turn around in wheel detection sections due to train changes or backtracking.

The present invention is characterized in that it not only detects the direction of wheels passing through a detection section as described above, but also correctly determines the direction of wheels that turn around in the detection section. Therefore, its operation will be explained with reference to Figs. 1 to 4. In the time chart shown in Fig. 2, d is the right direction memory relay.
The operation chart of CRmR, e is the operation chart of the right direction detection output relay TDC-R, f is the operation chart of the left direction memory relay CLmR, and g is the operation chart of the left direction detection output relay TDC-L.
When the wheel 1 moving from left to right in Figure 1 enters the wheel detection range A shown in Figure 2, the right memory relay CRmR is activated as the relay _C1R is restored as described above. The recovery will be completed as shown in d of the same figure, but if the wheel turns back to the left in section A and leaves the wheel detection range A to the left, relay C ₁ R will be activated.
operates and the contact C ₁ R1 shown in FIG. 3 is formed, so that the right memory relay CRmR is energized and operates, returning to the normal state. During this time, relay TDC
-R remains active and does not generate right direction detection output.

Wheel 1 moving from left to right is wheel detection range A →
When turning from C to A and then to the left, both relays C ₁ R and CRmR are restored in the section of wheel detection range A as described above, and relay C ₂ R is also restored in section C, but the right direction detection output relay As shown in FIG. 3, the TDC-R maintains its operating state because the excitation circuit is constituted by the recovery contact C ₁ R2 of the relay C ₁ R. When wheel 1, which turned around in section C, enters section A,
Relay C ₂ R operates and power is supplied through its contact C ₂ R2, so relay TDC-R maintains its operation. Furthermore, when wheel 1 passes to the left from section A, relay C ₁ R is activated. The right memory relay CRmR is also excited and operated via its operating contact C ₁ R1 and the operating contact C ₂ R1 of the relay C ₂ R, returning to the normal state. During this time, relay TDC-R maintains its operation and does not output any detection output.

Wheel 1 moving from left to right is wheel detection range A →
When turning back from C to B to C to A to the left, relays C ₁ R and CRmR are restored in the A section as described above, and relay C ₂ R is also restored in the C section, so the right direction The detection output relay TDC-R is energized only through the recovery contact _C1R2 and maintains its operation. Next B
When the wheel 1 enters the section, the relay C ₁ R operates, and the restoration contact C ₁ R2 is opened, so that the right direction detection output relay TDC-R is restored and the right direction detection which is the information output of the count 1 is performed. Generates output.

When wheel 1 turns around and moves to the left in section B of wheel detection range and enters section C, relay C ₁ R is activated.
is restored again, the contact C ₁ R2 is configured, relay TDC-R operates, and the right direction detection output becomes null. At this time, as shown in Figure 3, the relay
Since TDC-R has a time constant with a resistor r ₁ and capacitor c ₁ connected in series and parallel to delay the operation, both relays C ₂ R and C ₁ R are in the recovery state in the section C. In addition, contact C ₂ R1, contact C ₁ R1,
After supplying power to relay CRmR through contact TDC-R1 and operating relay CRmR, contact C ₂ R
1 and the excitation current through contact CRmR1
Make CRmR operation self-maintaining. This means that even if wheel 1 turns right again from section C of the wheel detection range and passes section B, the operating state of relay TDC-R is maintained at contact CRmR2 shown in Fig. 3, and the wheel 1 turns right again. This is to prevent direction detection output from being output.

When wheel 1, which turned around in section B of wheel detection range, moves further to the left and enters section A from section C, relay C ₂ R is activated, cutting off the excitation circuit of relay CRmR, and relay CRmR is activated. Recover. In this case, when the wheel 1 returns to section A, the left direction detection output relay TDC-L shown in the chart of FIG.
is restored and the left output becomes a count of 1, so that if the wheel 1 moves to the right again from this point on, preparations are made so that a right direction detection output can be obtained. When wheel 1 moves further to the left and exits section A to the left, both relays C ₁ R and C ₂ R operate, so the system is configured via their contacts C ₁ R1 and C ₂ R1. The excitation circuit activates relay CRmR and returns to normal state. A series of these folding operations is illustrated by broken lines in the charts of FIGS. 2d and 2e. Similarly, the operation of left direction detection is shown in the charts f and g of the same figure.

By configuring the circuit as described above, the first
Accurately calculate the number of wheels moving to the left or right after passing through the wheel detection ranges A, C, and B of the wheel detection device shown in Fig. Since it can be counted, it is possible to construct a highly reliable wheel detection device.

In the circuits shown in Figures 3 and 4, each relay is in operation during normal times and is configured to recover when a wheel is detected.
If the recovery of the relay corresponds to the presence of a train, in the event of a failure such as a circuit break, the relay will recover, determining that a train is present, causing the signal to display a stop signal, and maintaining the fail-safe function of stopping the train. be able to.

As described in the above embodiments, the wheel moving direction detecting device of the present invention detects the direction by a simple relay circuit configuration using the previously described wheel detecting device. This is extremely effective in simplifying and reducing the cost of counter-type train detection devices.

Furthermore, the present invention maintains the circuit in an operating state during normal times and restores it when a train wheel is detected, so the operating state can be set to "no train" and the restored state to "with train". If this is supported, in the event of a failure such as a circuit disconnection, the circuit will be restored and it will be possible to determine that a train is present and display a stop signal on the signal, which will have the excellent effect of ensuring fail-safe performance. .

[Brief explanation of the drawing]

1A and 1B are schematic diagrams of a wheel detection device used in the present invention, FIG. 2 is a time chart showing the operational relationship between the wheel detection device and the wheel movement direction detection device of the present invention, and FIG. FIG. 4 is a right direction detection circuit diagram as an embodiment of the direction detection device, and FIG. 4 is a left direction detection circuit diagram. 1: Wheel, 2: Rail, 3: Transmission coil, 4:
Receiving coil, C ₁ R, C ₂ R: Wheel detection output relay,
A, B: Wheel detection range unique to each relay, C: Wheel detection range common to each relay, CRmR: Right memory relay, CLmR: Left memory relay,
TDC-R: Right direction detection output relay, TDC-L:
Left direction detection output relay.

Claims (1)

[Claims] 1 A transmission system in which a transmitting coil is placed near a single rail on a railway, and two receiving coils are placed at a required interval along the rail, separating this coil from the rail, and inducing voltage in the receiving coil. The magnetic flux of the coil is shielded by the wheels moving on the rails,
A device that detects a wheel by a decrease in the induced voltage, and a detection range of a detection output based on the receiving coil of the device, each having a unique range of each receiving coil and a common range of the receiving coils, and Normal operation type direction memory means for storing the initial unique range detection output by utilizing the fact that the detection order differs depending on the moving direction of the wheels, and the storage conditions of the means and the conditions for generating the next unique range detection output. A wheel moving direction detecting device, characterized in that the wheel moving direction detecting device is provided with a normal operation type direction detecting output means for detecting the detection order according to the above, and detects the direction.