JPH02156301A - Field apparatus controller for railway - Google Patents

Abstract

PURPOSE:To improve the fail-safe property to improve the reliability and to make a device small-sized and light-weight by using relays and logic elements to select the majority of instruction signals coinciding with one another. CONSTITUTION:Signal lamp lightiung instruction signals from CPUs 1 to 3 are inputted to a logic element circuit 12 of a majority part 5 through a bus 11. When the majority of, namely, two or more lighting instruction signals are given from CPUs 1 to 3, an output is obtained from the circuit 12 to turn on a transistor 13. Then, solid-state relays 24 to 26 are operated through inverters 21 to 23 of an interface part 6. A signal lamp 31 for left advance, a signal lamp 32 for center passage, and a signal lamp 32 for right advance are lit together with a common signal lamp 34 according as relays are made conductive respectively. When relays 24 to 26 are faulty, this state is transmitted to CPUs 1 to 3 through a buffer circuit 14.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a device for controlling on-site equipment such as railway signals and rail branching devices.

(Prior art) In railways, it is necessary to control the lighting of signal lights that notify other trains of the presence of a certain train and indicate the direction in which it should proceed, and to control rail branching devices to switch rail points. There is.

FIG. 7 shows the configuration of a conventional device for controlling such field equipment. The field equipment 7 here corresponds to a signal light used when a train enters or exits between a commercial line and a detention line. This signal light is for left travel (LF).
), center passage (CT), and right passage (RT).

CPU I1, CPU1I2, and CPU113 instruct which of these signal lights should be lit, and each CPU independently performs calculations and issues instructions to ensure safety. Although each CPU operates on exactly the same program, they are connected by a synchronization link line 4 so that there is no difference in the timing at which processing ends.

Command signals from CPU I1, CPU1I2, and CPU113 are sent to the human output section 171 and the human output section [72], respectively.
, is given to the human output section lll73.

Command signals passed through the respective input/output sections are given to the majority decision section 74. Here, two matching signals out of the three command signals are selected based on the principle of majority voting.

The selected one command signal is given to the signal lamp as the field equipment 7 via the interface section 75.

Next, the configuration of the input/output section 11 is shown in FIG. A command signal from the CPU 11 is transmitted from the data bus 11 to the buffer circuit 8.
When the transistor 82 is turned on via the transistor 1, the relay 83 is energized and the contact 84 is closed. A circuit including the buffer circuit 81, transistor 82, relay 83, and contact 84 is provided for each of the three types of signal lights.

The circuit configurations of CPUll2 and CPUll3 are also similar.

FIG. 9 shows this input/output section 11. II2. The circuit configuration of the majority decision unit 74 that receives the 1- from nI3, the interface unit 75, and the signal lights 31 to 34 is shown. First, regarding the majority decision section 74, each contact point 84 mentioned above is divided into three blocks 74A, 74B,
Combined with 74C, 2 or more CP in one block
When a lighting command signal is received from U, the signal line to the signal light in the direction of travel is made conductive. For example, each CPUI, n as a contact point for leftward movement (L F)
.

Contacts LFI74a and LFII74b corresponding to (2).

There is a block 74A consisting of LFm74c, and these 3
Two types of contacts are combined and connected in series, and three are connected in parallel.

Therefore, if two or more of these contacts are closed, conduction will occur. Block 74B174C is a combination of contacts for rightward movement (RF) and center passage (CT)
The same applies to

These respective blocks 74A, 74B.

74C is connected to the interface section 75.

Block 74A connects to relay LF75a, block 74B
is connected to relay CT75b, and block 74C is connected to relay RT7.
5c. When there is continuity in block 74A, relay LF75a is energized and contact LF75d
closes. The left traveling signal lamp 31 and the common signal lamp 34 connected to this contact LF75d are turned on. The same applies to the lighting of the other right-travel signal lamps 33 and center passing signal lamps 32.

(Problems to be Solved by the Invention) However, such railway field equipment control devices have the following problems.

First of all, failsafe is not completely ensured. Reliability is ensured by independently calculating and issuing commands in the three CPUs II and II2, and by having the majority decision section 74 select two of the three commands. However, even if, for example, any of the relays 75a, 75b, 75c of the interface section 75 fails, the CPU II, II2. In 113, it is impossible to know this 11 state. Therefore, the signal that should be turned on is not turned on, which may lead to a serious accident on the railway.

Second, since many relays are used in the majority decision section 74, the entire device becomes large, heavy, and expensive.

The present invention is intended to solve the above problems, and an object of the present invention is to provide a railway field equipment control device that has excellent fail-safe properties, is highly reliable, and can be made smaller and lighter.

[Structure of the invention]

(Means for Solving the Problems) The railway field equipment control device of the present invention includes an odd number of three or more operation command means H for generating command signals for commanding the operation of railway field equipment, and each The motion commanding means of is given the command signal from each of the motion commanding section that independently issues commands and the motion commanding means of the motion commanding section, and a majority of the command signals of these are in agreement. a majority deciding unit that selects the matching command signal when the command signal matches;
In the railway field equipment control device comprising a command signal input section for manually inputting the matched command signals to the field equipment, the majority decision section and the command signal input section include a relay comprising a solid-state element and a logic circuit comprising a solid-state element. The command signal input section reads this phenomenon when the relay does not operate according to the command signal, and the failure reading means notifies the operation command section that the relay has failed. It is characterized by further having the following.

Here, the majority decision section provides the logic element with a clock signal generated by the operation instruction section, and when the output signal from the logic element does not include the clock signal, the logic element is determined to have failed. The present invention may be characterized in that it further includes a failure reading means for notifying the operation command section of the failure.

(Function) When a command signal is given to the majority decision section from each operation command means of the motion command section, a relay consisting of a solid state element and a logic element consisting of a solid state element are used to output the command signal that the majority agrees with. This operation is performed by a majority decision unit that is smaller and lighter than when mechanically operated relays are used. Also, when this matched command signal is given from the majority decision section to the command signal input section, if the relay does not operate according to this command t=, this phenomenon is read and the relay is determined to have failed and is notified to the operation command section. , the operation command unit is informed of the fact that the relay has failed.

Furthermore, in the majority decision section, a clock signal is given to the logic element from the operation instruction section, and when this clock signal is not included in the output from the logic element, this logic element has a failure and a function to notify this to the operation instruction section. By further having , the operation instruction section is informed of the fact that the logic element has failed.

(Example) An example of the present invention will be described with reference to FIG. 1 showing its configuration.

In comparison with FIG. 7 showing the conventional device, the input/output section 71.7
The difference is that the function of 2.73 and the function of the majority decision section 74 are combined into the majority decision section 5.

Accordingly, the configuration of the interface section 6 is different, but this interface section 6 corresponds to a command signal input section. Descriptions of other elements that are the same as those of the prior art will be omitted.

FIG. 2 shows the basic configuration of the majority decision section 5 in detail. Three such circuit configurations are provided for each of the signal lights for right-hand travel, left-hand travel, and center passage.

CPUII, CPU■2. Assume that a command signal to turn on, for example, a signal light for leftward travel is input from the CPU I3 to the majority decision section. The signal from CPU II is sent to AND gate 12a and AND gate 12c, the signal from CPU II is sent to AND gate 12b and AND gate 12a, and the signal from CPU II is sent to AND gate 12b and AND gate 12a.
The signal from Ull3 is applied to AND gate 12b and AND gate 12c, respectively. and AND gate 12a.

Signals from 12b and 12c are applied to OR gate 12d. As a result, CPUII, CPU[2, CPυ■
When a signal instructing the lighting of 2 or more of the majority from 3 is given, this command signal will be output from at least one of the three AND gates. Therefore, when at least one command signal is applied to the OR gate 12d from these three AND gates, that signal is output from the OR gate 12d.

When the command signal output from the OR gate 12d is applied to the transistor 13, the transistor 13 is turned on.

The buffer circuit section 14 is a buffer circuit 14a.

It has a buffer circuit 14b and a buffer circuit 14c, and receives a read pack signal from an interface unit 6, which will be described later, to transfer CPU I1, CPUI2, . CPUm
3 will be sent back.

The same applies to the circuit configurations corresponding to the other signal lights for moving to the right and for passing through the center.

FIG. 3 shows the configuration of the interface section 6.

The command signals from the three transistors 13 provided for each of the left-going, right-going, and center-passing transistors described above are sent to inverter circuits 21 and 22 that also serve as buffers, respectively.
．． Given to 23. The respective inverted signals are then manually input to solid state relays 24, 25, and 26. FIG. 4 shows the configuration of this solid state relay, and when voltage is applied to the light emitting circuit 24a,
That is, here, when a command signal is applied, an optical signal is generated toward the light receiving circuit 24b. As a result, the light receiving circuit 24
The ignition circuit 24c connected to the terminal b is driven, and the switch of the final stage triac 24d is closed.

When the solid state relay 24 closes, the left proceeding signal light 31 and the three common signal lights 34 light up. Similarly,
When the solid state relay 25 closes, the center passing signal light 32 and the three common signal lights 34 light up, and when the solid state relay 26 closes, the right proceeding signal light 32 and the three common signal lights 34 light up.

The lead packs 27, 28, and 29 have a buffer circuit and a rectifier circuit consisting of a resistor and a coil, and when the respective solid state relays 24, 25, and 26 do not close despite receiving a command signal, It is used to read such failures, and corresponds to a failure reading means.

For example, when the lead pack 27 detects a failure in the solid-state relay 24 corresponding to the left-hand traffic light, the respective buffer circuits 14a, 14b are connected from the terminal 35 to the terminal 15 in FIG.

CPUII via 14c, 12. It is reported that a failure has occurred in I3. Other solid state relays 25
．． The same applies to the case where the signal lamp 26 is out of order, and the buffer circuits 14a and 14 that are present corresponding to each signal lamp are
b, CPUI via 14c 1. [2, I3 is notified.

As described above, in this embodiment, if any of the solid state relays 24, 25, or 26 of the interface unit 6 fails, the CPU II, [2°■3] is immediately notified that such a situation has occurred. Therefore, it is possible to take prompt action and avoid serious train accidents.

In addition, the conventional input/output unit 11. [2, I[The function of I3 and the function of the majority circuit section are configured as one majority section 5, and furthermore, it is configured using a solid-state relay of a solid state element without using a mechanically operated relay. . Therefore, the entire device can be made smaller and lighter. Particularly recently, gate arrays can be easily formed by using ASIC technology, etc., so that integration and miniaturization can be achieved to a large extent. Along with this, the number of component parts is also significantly reduced, making it possible to improve reliability.

Next, a second embodiment will be described. This is field equipment 7
corresponds to II if it is a branching device that switches rail points. FIG. 5 shows the configuration of the majority decision section 5 in this case. What is different from the majority decision unit 5 of the first embodiment shown in FIG.
D gate 41a.

CPU I is connected to AND gate 41b and AND gate 41c.
1. ■2. (2) The clock signal from 3 is given. As a result, these AND gates 41
If two or more of a, 41b, and 41c are normal, the transistor 43 outputs a command signal with an excitation waveform based on this clock signal.

Such an excitation waveform output is suitable for driving a device that takes two positions depending on the direction of current flow, such as a switching relay 65 for switching rail points in the interface section 6 shown in FIG. ing.

In FIG. 6, if it is desired to switch points to set the rail at home position N, a command signal and a clock signal are applied to transistor 43N so that it is driven. Along with this, an excitation output is given to the transformer 51 and current flows to the secondary side, which is rectified by the bridge circuit 52 and current flows in one direction of the relay 53. The normally open contact 71 on the N side is closed, the normally closed contact 72 is open, and the contacts 73 and 74 on the R side maintain their current state. As a result, current flows through the switching relay 65 to the left in this figure, and one of the two types of contacts (not shown) closes. This changes the point so that the rail is in the normal position on the N side.

If it is desired to switch the point so that the rail is set in the reverse position R, transistor 43R is turned on, resulting in a current flowing in the opposite direction through switch relay 65, and the other of the two contacts is switched on. close.

In the case of such a second embodiment, the AND gate 41
If two or more of a, 41b, and 41c fail, no excitation output is output from the transistor 43 because the clock signal is not output from the OR gate 12d. Therefore, taking the fixed position N side as an example, no current flows to the secondary side of the transformer 51, the normally open contact 71 remains open, and this fact of failure is detected by the buffer circuit section 14 in FIG. . Then, from the buffer circuit section 14, CPU II, I
This information is communicated to I2, 1113.

As a result, in this embodiment, if a logic element fails, it is immediately detected, and by taking prompt action, it is possible to prevent railway accidents from occurring, and it can be said that the system is highly reliable.

The embodiments described above are merely examples and do not limit the present invention. For example, field devices are not limited to signal lights for indicating the direction of travel and rail branching devices, but can also control other field devices such as track relays installed on the rails at fixed distances to detect the location of trains. It may be for a purpose. Also, CP as an operation command means.
The number of U is not limited to three, but may be an odd number of three or more.

Furthermore, the majority decision section shown in FIG. 2 or FIG. 5 is composed of a relay made of solid-state elements and a logic element, but the contents of the structure are merely examples, and the respective components from the operation command means are It is sufficient that a signal with a majority of matching command signals can be selected from among the command signals.

〔Effect of the invention〕

As explained above, in the railway field equipment control device of the present invention, the majority decision section is constructed using a relay logic element made of a solid-state element, so that the device as a whole can be made smaller and lighter.

In addition, the command signal input section reads this phenomenon when the relay does not operate according to the command signal and notifies the operation command section of the failure, making it possible to respond quickly to failures and prevent serious train accidents. Since it is possible to avoid this, it can be said that it has excellent fail-safe properties and is highly reliable.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing the configuration of a railway field equipment control device according to an embodiment of the present invention, Fig. 2 is a block diagram showing the configuration of the majority decision section of the device, and Fig. 3 is an interface of the device. FIG. 4 is a block diagram showing the configuration of the solid-state relay in the interface section, and FIG. 5 is a majority decision section of a railway field equipment control device according to another embodiment of the present invention. 6 is a block diagram showing the configuration of the interface section of the device, FIG. 7 is a block diagram showing the configuration of a conventional railway field equipment control device, and FIG. 8 is the same block diagram. FIG. 9 is a block diagram showing the configuration of the input/output section of the device, and FIG. 9 is a block diagram showing the configuration of the majority decision section and interface section of the device. 1...cpuI, 2...CPUII, 3...C
PUn1, 4... Synchronous link line, 5... Majority decision section, 6, 75... Interface section, 7... Field equipment, 12a, 12b, 12c, 41a, 41b. 4] ]c------AND gates 12d, 41d
-...OR gate 12d, 13.43...transistor, 14a, 14b, 14cm...buffer circuit,
21.22.23... Inverter circuit, 24.25.
26...Solid state relay 27.28.29
...Lead pack, 31...Left proceeding signal light, 32
...Signal light for passing through the center, 33...Signal light for proceeding to the right,
34... Common signal light, 51.61... Transformer, 5
2.62...bridge circuit, 65...transition relay,
71, 72.73... Input/output section, 74... Majority circuit section, 81.85... Buffer circuit, 83... Relay, 84... Contact.

Claims (1)

[Claims] 1. An odd number of three or more operation command means for generating command signals for commanding the operation of railway field equipment, and each of the operation command means independently issues commands. an operation command unit; and a majority decision unit that receives each of the command signals from the operation command means of the operation command unit and selects the command signal that matches when a majority of the command signals match. and a command signal input unit for inputting the matched command signals to the field equipment, wherein the majority decision unit and the command signal input unit include a relay made of a solid-state element and a command signal input part made of a solid-state element. The command signal input section reads this phenomenon when the relay does not operate according to the command signal, and indicates that the relay has failed and informs the operation command section of this fact. A railway field equipment control device further comprising reading means. 2. The majority decision section provides the clock signal generated by the operation instruction section to the logic element, and determines that the logic element has failed if the clock signal is not included in the output signal from the logic element. 2. The railway field equipment control device according to claim 1, further comprising a failure reading means for informing said operation command section of the failure.