JP3036260U - Dual-type track circuit receiver - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] It is not necessary to provide a dedicated low-voltage detection device externally, and train detection when a low voltage is achieved can be realized with a simple configuration. PROBLEM TO BE SOLVED: To provide a binary track circuit receiver which does not require much time for adjustment. SOLUTION: When the train does not enter the track circuit under the condition that the local voltage applied directly from the transmitter 2 and the track voltage applied from the transmitter 2 via the track circuit 3 are constantly applied, the operation is performed. Track relay 5 that outputs a detection signal indicating that there is no train, outputs a detection signal that a train exists when the train enters and the track circuit is short-circuited, and the local voltage has become a low voltage below the reference voltage. When the low voltage detecting means detects a low voltage, the track relay 5 outputs a detection signal indicating that there is no train even when the track relay 5 is outputting a detection signal indicating that there is no train. Output.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 This invention relates to a dual track circuit receiver for railway signals.

[0002]

[Prior art]

 Conventionally, track relays were generally used to detect the presence or absence of trains in the track circuits of railways, but these track relays do not have a low-voltage detection function, and if the local voltage drops, the train Regardless of the presence or absence of trains, the track relay will be restored and the reliability of train detection results will be significantly reduced. Therefore, a dedicated low-voltage detector is installed outside to monitor the local voltage. Therefore, the train detection output and low-voltage detection output are independent signals, and if a large number of track circuits in a station yard are concentrated, a complicated control circuit configuration will be created, and in order to realize that function. It took a lot of construction time, and a lot of time for level confirmation and adjustment.

[0003]

[Problems to be solved by the device]

 Therefore, the present invention solves the above-mentioned conventional problems, does not require an external low-voltage detection device for exclusive use, and can realize train detection when the voltage becomes low with a simple configuration. It is an object of the present invention to provide a binary type track circuit receiver which does not require much time for confirmation and adjustment like a relay.

[0004]

[Means for Solving the Problems]

 In order to achieve the above object, the invention of claim 1 is such that a train enters a track circuit while a local voltage applied directly from a transmitter and a track voltage applied from a transmitter via a track circuit are constantly applied. When not in operation, it outputs a detection signal without a train, and when a train enters and short-circuits the track circuit, it recovers and outputs a detection signal with a train, and the local voltage is below the reference voltage. When the low voltage detecting means detects a low voltage, the track relay is outputting a trainless detection signal. Also outputs a detection signal that there is a train.

According to the second aspect of the invention, when the train does not enter the track circuit under the condition that the local voltage applied directly from the transmitter and the track voltage applied from the transmitter via the track circuit are constantly applied. Track relay that operates and outputs an H-level signal as a train-less detection signal, and recovers when a train enters and the track circuit short-circuits and outputs an L-level signal as a train detection signal. And a low voltage detection circuit that outputs an H level signal when the local voltage is a normal voltage above the reference voltage and an L level signal when the local voltage is below the reference voltage, and the track relay When the output signal is at H level and the output signal of the low voltage detection circuit is at H level, a trainless detection signal is output, and when the track relay output signal is at H level and the low voltage detection circuit is at L level. Has a train And a circuit for outputting a detection signal.

[0006]

[Embodiment of the invention]

 FIG. 1 is a block diagram showing an embodiment of the present invention. In this embodiment, 1 is a binary track circuit receiver, 2 is a transmitter, and 3 is a track circuit. The binary type track circuit receiver 1 is composed of a track relay 5, a low voltage detection circuit 6, and an AND circuit 7. The track relay 5 is a track circuit under the condition that the local voltage Lt directly sent from the transmitter 2 without passing through the track circuit 3 and the track side voltage Et applied from the transmitter 2 through the track circuit 3 are constantly applied. When there is no train in 3rd train, it operates and outputs H level signal as a detection signal of no train. Outputs an L level signal.

The low voltage detection circuit 6 and the AND circuit 7 form a low voltage detection means 8. That is, the low voltage detection circuit 6 is connected to the input side of the track relay 5 and detects that the local voltage (normal voltage is 110V) becomes a low voltage equal to or lower than the reference voltage (85V). When the voltage is a normal voltage above the reference voltage, an H level signal is output, and when the voltage is a low voltage below the reference voltage, an L level signal is output. The AND circuit 7 is connected to the output side of the low voltage detection circuit 6 and then to the output side of the track relay 5, and outputs the output signal (A) from the track relay 5 and the output signal (B) from the low voltage detection circuit 6 ) To compare the two. When the output signal of the track relay 5 is at the H level and the output signal of the low voltage detection circuit 6 is at the H level, a detection signal indicating no train is output, and when the output signal of the track relay 5 is at the H level, the low voltage detection circuit is output. When the output signal of 6 is at the L level, the detection signal of the presence of the train is output (C). At this time, if the local voltage is a low voltage below the reference voltage, the normal voltage cannot be maintained and the train presence detection signal is output as described above so as to act on the safe side in train operation. The drop is output as a low voltage detection. An alarm is issued by this low voltage drop detection signal.

Next, the operation of this embodiment will be described with reference to the time chart shown in FIG. In this embodiment, the local voltage (normal voltage) is 110V, the orbital voltage is 2V, and the reference voltage is 85V. As shown in the normal state in the left column of FIG. 2, the track relay 5 operates to output an H level signal when the local voltage Lt and the track voltage Et are constantly applied, and the low voltage detection circuit Since 6 also outputs a signal of H level, the AND circuit 7 outputs a signal of H level and outputs a detection signal of no train. When the train enters the track circuit 3 and the track circuit is short-circuited from this state, the track side voltage Et becomes 0V, the track relay 5 recovers and outputs the L level signal, and the low voltage detection circuit 6 also outputs the L level signal. The AND circuit 7 outputs an L level signal and a train presence detection signal.

In the state at the time of low voltage detection in which the local side voltage Lt drops and becomes a low voltage equal to or lower than the reference voltage, as shown in the right column of FIG. 2, the low voltage detection circuit 6 outputs an L level signal. Is output. At this time, the orbit relay 5 outputs an H level signal. Therefore, the AND circuit 7 outputs an L level signal and a train presence detection signal. When the low voltage state continues for T time and the local voltage Lt returns to the normal voltage again, the low voltage detection circuit 6 outputs an H level signal after a predetermined time (t) from the time of the return, and the AND circuit 7 also It outputs an H level signal, outputs a trainless detection signal, and returns to a normal operating state. In this way, even if the level of the local voltage Lt drops, the binary track circuit receiver 1 itself determines that the voltage is low and can output the result, which improves the reliability of train detection.

As described above, in this embodiment, the low voltage detection circuit 6 and the AND circuit 7 constitute the low voltage detection means 8. However, this is just a preferable example, and the low voltage detection circuit 6 and the AND circuit 7 are combined. It goes without saying that circuits having the same function may be configured by a circuit configuration other than the circuit 7 or a single circuit configuration.

[0011]

[Effect of the invention]

 Since the inventions of claims 1 and 2 are configured to have a built-in low-voltage detection function as described above, it is not necessary to provide an external low-voltage detection device for exclusive use, and train detection is performed when the voltage becomes low. Can be realized with a simple configuration. Moreover, the large work time required for checking and adjusting the conventional orbital relay system is no longer necessary, which has the excellent effect of improving economic efficiency.

[Brief description of the drawings]

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

FIG. 2 is a time chart for explaining the operation.

[Explanation of symbols]

 1 2 type track circuit receiver 2 transmitter 3 track circuit 5 track relay 6 low voltage detection circuit 7 AND circuit 8 low voltage detection means

Claims (2)

[Utility model registration claims] 1. The train operates when the train does not enter the track circuit with the local voltage applied directly from the transmitter and the track voltage applied from the transmitter via the track circuit at all times. A track relay that outputs a detection signal indicating that there is no train, and that recovers when the train enters and the track circuit is short-circuited and outputs a detection signal that there is a train, and detects that the local voltage has become a low voltage below the reference voltage. When the low voltage detection means detects a low voltage, the track relay outputs a detection signal with a train even when the track relay outputs a detection signal without a train. A dual-type track circuit receiver characterized in that 2. The train operates when the train does not enter the track circuit with the local voltage applied directly from the transmitter and the track voltage applied from the transmitter via the track circuit at all times. A track relay that outputs an H level signal as a detection signal indicating that there is no train and that recovers when a train enters and the track circuit is short-circuited and outputs an L level signal as a detection signal indicating that a train exists, and the local voltage is the reference A low voltage detection circuit that outputs an H level signal when the voltage is a normal voltage or higher and a L level signal when the voltage is a low voltage that is lower than the reference voltage, and the output signal of the track relay is an H level. When the output signal of the low voltage detection circuit is at the H level, a detection signal indicating that there is no train is output, and when the output signal of the track relay is at the H level and the output signal of the low voltage detection circuit is at the L level, there is a train. Detection signal And a dual-purpose track circuit receiver.