JPH062255U - Railway signal relay sensor - Google Patents

Abstract

(57) [Abstract] [Purpose] Without changing the use state of the electrical parts and contacts of the railway signal relay, and without affecting the circuits related to the railway signal relay. Reliably detects the operation / recovery status of railway signal relays. [Structure] A magnetic head 6 mounted on the outside of a railway signal relay for detecting a leakage magnetic flux φ leaking from a magnetic circuit of the railway signal relay, and the presence or absence of the leakage magnetic flux φ detected by the magnetic head 6 The detection means 7 is provided for converting into an electric signal representing the operation / recovery state of the relay for use, and the output terminal 8 for outputting the electric signal of the detection means 7 to the outside.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a railway signal relay sensor that detects the operation / repair state of a railway signal relay that is often used in railway signal systems.

[0002]

[Prior art]

 The railroad signal system has a built-in electric circuit composed of a large number of railroad signal relays (hereinafter abbreviated as relays) for performing its function.

In this system, the result of logical processing in the electric circuit inside the system is output via the relay circuit, and the condition from outside the system is taken into the system via the relay circuit. Depending on the type of system, the number of relays used for this purpose can range from a few small to a large number of thousands.

A typical example of this system is a relay interlocking device and a railroad crossing control device. In such a railway signal system, processing of external input conditions and the like are all related to individual behaviors of relays and combinations of several relays. It is performed depending on the operation status (operation / recovery) of some relays such as circuit operation.

Therefore, when an abnormality occurs in the operation of each relay, the processed result becomes erroneous. In particular, railway signal systems that use a large number of relays are naturally prone to failure, and once a failure occurs, it often takes a long time to search for and recover from the cause. In some cases, the cause of the failure may not be able to be found, such as when the failure has recovered itself, and the system continues to operate with the anxiety factor built into the system.

In order to avoid such a situation, some main relays of the system are always monitored, and the operation states of those main relays are stored, and when a failure occurs, the operation of the related relays before and after the failure occurs in the designated sequence. If the condition can be tracked, it will be easier to search for the cause of the failure. Therefore, the railway signaling system is equipped with a monitoring device that stores the operating status of the main relays.

[0007]

[Problems to be solved by the device]

 This monitoring device is usually configured to capture the operating state of the relay into the device by means of a circuit that passes through the contacts of the relay, and record the change in the operating state (operation / recovery) of the relay and its time. Generally, each relay has several sets of contacts, and these contacts are used to control other electric circuits, other relays, or devices outside the device. Therefore, it is necessary to capture the operation status of each main relay to be monitored into the monitoring device by the circuit that passes through the contact of the relay, but the contact to be used is the relay because it is necessary to avoid affecting other circuits. Normally, it is called an "empty contact". If the relay to be monitored has an empty contact, the operating state of the relay is directly extracted from this empty contact. In other words, in order to effectively monitor the operating states of the main relays of the railway signaling system by introducing monitoring equipment, it is an important issue to be able to secure free contacts for those monitored relays. However, in actual cases, there are cases where free contacts cannot be secured due to the circuit conditions in which the relays are used, and free contacts are always secured for all relays whose operating status is to be monitored, and direct monitoring is not possible. It is necessary to deal with such cases.

Conventionally, when an open contact cannot be ensured in a monitored relay, a method of adding a reaction relay has been used. As a general rule, the reaction relay is driven by the original relay that is the target of monitoring.When adding additional reaction relays, even if the reaction relay contacts among the several circuits that use the original relay contacts, Select a circuit that does not interfere, move it to the contact of the reaction relay, effectively unscrew the empty contact from the original relay, and change the system wiring to drive the reaction relay. However, this method is based on the assumption that there is room to add a reaction relay to the relay rack to which the original relay is attached, and if the relay rack does not have room, the monitoring of the relay is abandoned, or However, there is no problem with the need to carry out large-scale construction work to expand the number of relay racks.

An object of the present invention is to change the use state of the electrical parts and the contacts of a railroad signal relay without affecting the circuit related to the railroad signal relay. It is an object of the present invention to provide a railway signal relay sensor that reliably detects the operation / recovery state of a railway signal relay.

[0010]

[Means for Solving the Problems]

 The present invention provides a magnetic head mounted on the outside of a railway signal relay for detecting a leakage magnetic flux leaking from a magnetic circuit of the railway signal relay and the presence or absence of the leakage magnetic flux detected by the magnetic head. It is provided with a detecting means for converting into an electric signal representing an operation / recovery state of the signal relay and an output terminal for outputting the electric signal of the detecting means to the outside.

[0011]

【Example】

 FIG. 1 is a diagram showing a basic configuration of an embodiment of the present invention.

The railroad signal relays to be monitored (hereinafter abbreviated as relays) include A type and F type, both of which are driven by a direct current, and the structure of the electromagnet part thereof Is as shown in FIG. That is, when an electric current flows through the drive coil 1 of the relay, a magnetic circuit is formed by a closed path of the iron core 2 to the armature 3 to the yoke 4 to the iron core 2, and the main magnetic flux Φ attracts the armature 3 to the iron core 2 to The contact (not shown) operates in conjunction with the armature 3. Therefore, the action of the contact point of the relay perfectly corresponds to the excited state of the electromagnet.

On the other hand, the magnetic flux generated by the drive coil 1 circulates through the above-mentioned path, and a part thereof becomes a leakage magnetic flux φ of several oersteds and circulates through the outside (surroundings) of the relay.

In the relay signal relay sensor 5 according to one embodiment of the present invention, the magnetic head 6 is a magnetic detector capable of detecting a small amount of magnetic flux, and the magnetic head 6 is installed in the path of the leakage magnetic flux φ. The leakage magnetic flux φ is detected. In this case, in order to avoid the influence of the electromagnets of other adjacent relays and perform stable operation, as an example of the detection performance of the magnetic head 6, the detection range is from 2 + 0 gauss to 2-0.4 gauss. It is practical to do. The leakage magnetic flux φ detected by the magnetic head 6 is processed by the detection means 7 and converted into an electric signal indicating the operation / recovery state of the relay, which is output from the output terminal 8 to the outside and also displayed by the display means 9. The operation / recovery status of is displayed.

FIG. 2 is a block diagram showing a concrete circuit configuration of an embodiment of the present invention.

When a current is passed through the drive coil 1 of the relay and the electromagnet is excited, the magnetic head 6 detects the leakage magnetic flux φ. An AC signal oscillator 10 is connected in series to the coil of the magnetic head 6, and the series circuit thereof is connected to the input of the detection / amplification circuit 11. The level of the output analog signal of the detection / amplification circuit 11 changes according to the voltage appearing in the magnetic head 6 due to the leakage magnetic flux φ, and this is converted into a digital signal by the comparator circuit 12.

Note that the manufacturer of the relay has confirmed that there are two types of attachment directions of the electromagnets incorporated in the relay. Therefore, there are two types of polarities of the leakage magnetic flux φ depending on the relay, and the polarities of the voltages appearing in the magnetic head 6 are also in the opposite directions, so that the comparator circuit 12 can detect each of these polarities. The comparator 12n and the S-pole comparator 12s are provided as one set, and the outputs from these are selectively taken out by the OR circuit OR, so that necessary measures are taken.

When an output appears in the OR circuit OR, that is, when the electromagnet is excited and the relay is in an operating state, the operation display light emitting diode 13a is turned on in the display circuit 13 and the output of the output circuit 14 is output. An output appears between the terminals 8c and 8a. Further, when the relay is in the recovery state, no output appears in the OR circuit OR, so that the recovery display light emitting diode 13b lights up via the inverter INV in the display circuit 13 and the output terminal 8c of the output circuit 14c. Output appears between ~ 8b. In addition, 14a and 14b are photocouplers for insulation.

Since the operation of the contact of the relay completely corresponds to the excited state of the electromagnet, the presence or absence of current in the drive coil 1 of the relay, that is, the relay The operation / recovery status can be detected.

FIG. 3 is a diagram showing a specific shape of an embodiment of the present invention. FIG. 3 (a) is a front view of a railway signal relay sensor 5, and FIG. 3 (b) is a side view thereof. FIG. 3C is also a rear view.

Further, FIG. 4 is a view showing a mounting state of the railway signal relay sensor 5 with respect to the monitored railway signal relay.

As shown in FIG. 3, a case 15 of the rail signal relay sensor 5 is provided with a detection surface 16 on which the magnetic head 6 (FIGS. 1 and 2) is mounted and a mounting bracket 17. As shown in FIG. 4, the case 15 uses a screw 20 for attaching the railroad signal relay 18 to the relay rack 19 at the rear of the railroad signal relay 18 to be monitored by the mounting bracket 17. Can be installed. Further, as shown in FIG. 3C, the rear surface of the case 15 is provided with connection terminals 21 for power supply and output, a light emitting diode 13a for operation display and a light emitting diode 13b for recovery display.

As described above, the railway signal relay sensor 5 according to the present invention has a structure that can be easily attached to and detached from the outside of the relay without any modification to the relay circuit.・ Easy modification and constant flexibility. In addition, since the device itself processes and displays the detection results of the operation / recovery status of the monitored relays, the operating status of each monitored relay can be confirmed even from a remote location.

Further, since this device is composed of all electronic components and has a high response speed of about 1 ms, a wide range of applications can be expected.

[0025]

[Effect of device]

 As described above, according to the present invention, a magnetic head mounted on the outside of a railway signal relay for detecting a leakage magnetic flux leaking from a magnetic circuit of the railway signal relay, and a leakage detected by the magnetic head. Since the presence / absence of magnetic flux is provided with a detecting means for converting the electric signal representing the operation / recovery state of the railway signal relay and an output terminal for outputting the electric signal of the detecting means to the outside, the electric signal of the railway signal relay is provided. The operation / recovery status of the railway signal relay can be reliably detected without changing the usage state of the related parts and the contacts and without affecting the circuits related to the railway signal relay. be able to.

[Brief description of drawings]

FIG. 1 is a diagram showing a basic configuration of an embodiment of the present invention.

FIG. 2 is a block diagram showing a specific circuit configuration of an embodiment of the present invention.

FIG. 3 is a view showing a specific shape of an embodiment of the present invention.

FIG. 4 is a view showing a mounting state of the railway signal relay sensor of FIG. 3 with respect to a monitored railway signal relay.

[Explanation of symbols]

 1 Drive coil 2 Iron core 3 Armature 4 Yoke 5 Relay signal relay sensor 6 Magnetic head 7 Detection means 8, 8a, 8b, 8c Output terminal 9 Display means 10 AC signal oscillator 11 Detection / amplification circuit 12 Comparator circuit 12n N-pole comparator 12s S-pole comparator 13 Display circuit 13a Operation display light-emitting diode 13b Recovery display light-emitting diode 14 Output circuit 14a, 14b Photocoupler 15 Case 16 Detection surface 17 Mounting bracket 18 Railroad signal relay 19 Relay frame 20 Screw 21 Connection terminal INV Inverter OR OR circuit Φ Main magnetic flux φ Leakage magnetic flux

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Eisaku Arai 1-42-102 Konan, Konan-ku, Yokohama-shi, Kanagawa 1-42-102 (72) Toho Toriaki 1731 Kamiodachu, Nakahara-ku, Kawasaki-shi, Kanagawa

Claims (1)

[Scope of utility model registration request] 1. A magnetic head mounted on the outside of a railway signal relay for detecting a leakage magnetic flux leaking from a magnetic circuit of the railway signal relay, and the presence or absence of the leakage magnetic flux detected by the magnetic head is determined by the railway. A railway signal relay sensor comprising: a detection unit that converts an electric signal indicating an operation / recovery state of the signal relay, and an output terminal that outputs the electric signal of the detection unit to the outside.