JP5198330B2 - Power cableless ground unit - Google Patents

Description

  The present invention relates to a power cableless ground unit used for an on-vehicle speed check type ATS system.

The ATS system has a function of automatically operating a brake of a train to stop the train before the stop signal when a human error occurs such as when the driver misunderstands the stop signal and proceed. In addition, it has a function of stopping the train even when the train enters at a speed limit or higher such as a curve of the track. The on-vehicle speed check type ATS system is a train control system that adds a vehicle-to-ground digital information transmission function to the function of the current ATS-S system and realizes on-board speed check to increase the degree of security.

In a train control system such as an ATS system, laying a power cable to supply power to a ground unit that transmits information to the vehicle upper unit has a problem that the introduction cost of the system increases. This is because cable installation costs account for a large proportion of the introduction of the railway security signal system. Therefore, various power cable-less ground elements used for train control systems have been developed.

For example, a power cableless ground element used in an ATS-P system receives a power wave transmitted from a vehicle element as described in Japanese Patent Application Laid-Open No. 2004-82818 (Patent Document 1). Some are configured to generate drive power and transmit predetermined information from the ground to the vehicle using the drive power supply. A power cableless ground unit using a battery as a power source is described in, for example, Japanese Patent Application Laid-Open No. 6-144227 (Patent Document 2).

By the way, in the on-vehicle speed check type ATS system, since the vehicle upper part used in the existing ATS-S system is diverted, the power wave cannot be transmitted from the vehicle upper part like the ATS-P system. Therefore, the power cable-less ground element described in Patent Document 1 and Patent Document 2 used in the ATS-P system cannot be used. Accordingly, there is a demand for the development of a power cableless ground unit that uses a battery used in the on-vehicle speed checking ATS system as a power source.

JP 2004-82818 A JP-A-6-144227

Railway Technical Research Institute website “Main research results (FY2005) Safety and reliability 8. On-vehicle speed check type ATS compatible with current ATS”

A first problem to be solved by the present invention includes a vehicle upper element that constantly transmits a spread spectrum wave (hereinafter referred to as an SS wave) in order to detect a resonance coil of a ground element. In a power cableless ground unit that is used in an on-vehicle speed check type ATS system and uses a battery as a power source, it is to extend the life of the battery without requiring a large cost.
A second problem to be solved by the present invention is used in an on-vehicle speed check type ATS system having an on-board element that constantly transmits an SS wave in order to detect a resonance coil of a ground element. In the power cableless ground element, the vehicle upper element can reliably receive the fixed information from the power cableless ground element.

A power cableless ground unit that solves the first problem includes an SS wave detection unit including an SS wave reception coil, an information transmission unit including an information wave transmission coil, and a battery power supply unit, and constantly transmits an SS wave. A power cableless ground unit used in an on-vehicle speed check type ATS system provided with a vehicle unit, wherein the SS wave detecting unit detects an SS wave via the SS wave receiving coil and exceeds a threshold value. In this case, the drive power supply path from the battery power supply unit to the information transmission unit is turned on, and the drive power supply path is turned off when the value is equal to or lower than a threshold value. The fixed information is transmitted from the transmission coil to the vehicle upper element, and when the transmission of the predetermined fixed information is completed, the fixed information is returned to the standby state.
Further, in order to solve the first problem, the information transmission unit of the ground unit may be configured such that the vehicle unit and the ground can be used even when the vehicle unit stops on the power cableless ground unit or when the vehicle unit passes slowly. Only 8 frames of fixed information are transmitted when a child is combined once.
Furthermore, in order to solve the second problem, the power cable-less ground element is made narrower in the SS wave reception response range than the response range in which information transmission between the power cable-less ground element and the vehicle element is possible. The transmission unit and the SS wave detection unit are configured.

In the power cableless ground unit using the battery used in the on-vehicle speed check type ATS system of the present invention as the power source, the information transmitting unit transmits predetermined fixed information from the transmission coil to the vehicle upper unit, When transmission is completed, it is configured to return to the standby state before the drive power supply path is turned off, so the battery power supply unit for the time from when the drive power supply path is turned off until the drive power supply path is turned off The power consumption is not substantially generated. Further, the on-vehicle speed check type ATS system is configured by using the on-board element of the existing ATS-S system as it is.
Therefore, according to the present invention, in the power cableless ground element using the battery used for the on-vehicle speed check type ATS system as a power source, the battery life can be extended without requiring a large cost. ".
In addition, in the on-vehicle speed check-type ATS system equipped with a power cableless ground unit that uses a battery as a power source, the SS wave receiving response range is narrower than the response range in which information can be transmitted between the ground unit and the vehicle unit. Since the information transmission unit and the SS wave detection unit of the power cableless ground unit are configured as described above , in the positional relationship between the ground unit and the vehicle upper unit where the drive power supply path is turned on, the power cableless ground unit is fixed from the power cableless ground unit. Ri Na way the information board coil can reliably received, both the reliability of the consumable reducing the information transmission of the battery can be realized.

It is a block block diagram of Example 1 of this invention. It is operation | movement explanatory drawing of Example 1 of this invention. It is explanatory drawing of the relationship of the receiving response range of SS wave rather than the response range which can transmit the information between the power cableless ground element and the vehicle upper element in Example 1 of this invention.

The present invention is a power cableless ground unit used in an on-vehicle speed check type ATS system including a vehicle unit that constantly transmits a spread spectrum wave (SS wave) to detect a resonant coil of the ground unit, An SS wave detecting unit including an SS wave receiving coil, an information transmitting unit including an information wave transmitting coil, and a battery power source unit, the SS wave detecting unit detects an SS wave via the SS wave receiving coil, and a threshold value Is exceeded, the driving power is supplied from the battery power supply unit to the information transmission unit, and the information transmission unit transmits predetermined fixed information from the transmission coil to the vehicle upper element.

The power cableless ground unit according to the present invention is similar to the existing ATS-S system in that an on-board speed check type ATS provided with a vehicle unit that constantly transmits radio waves for detecting a resonance coil of the ground unit. It is used for the system. This radio wave is 115 ± 26.25 kHz SS wave in the on-vehicle speed check type ATS system. Incidentally, the existing ATS-S system has a single frequency signal of 103 kHz.

As shown in FIG. 1, the power cableless ground unit 10 according to the first embodiment includes an SS wave receiving coil 11, a band filter 12, a relay drive circuit 13 and a relay 14, a telegram transmission circuit 16, and a ROM storing unique information. The storage unit 17, the transmission coil 18, and the battery power source unit 15 are configured as described above. On the other hand, the ATS on-board device 20 mounted on the vehicle includes an on-vehicle transmitter / receiver 22 and an on-board element 21 as shown in FIG.

The SS wave receiving coil 11, the band filter 12, the relay drive circuit 13, and the relay 14 constitute an SS wave detection unit of the power cableless ground unit 10. The message transmission circuit 16, the storage unit 17, and the transmission coil 18 constitute an information transmission unit.

The battery power supply unit 30 includes a primary battery such as a manganese dioxide lithium battery having excellent stability. The relay 14 of the SS wave detection unit is a relay having a normally open contact so as to turn on / off a drive power supply path for supplying drive power from the battery power supply unit 15 to the message transmission circuit 16 of the information transmission unit. Has been placed.

In the power cableless ground element 1 of the first embodiment configured as described above, a vehicle equipped with the ATS onboard device 20 including the on-vehicle transmitter / receiver 22 approaches the power cableless ground element 1, and the SS wave receiving coil thereof When 11 is electromagnetically coupled to the vehicle upper member 21 of the ATS vehicle upper device 20, the SS wave receiving coil 11 receives the SS wave transmitted by the vehicle upper member 21.

As shown in FIG. 2, the SS wave receiving coil output (a) received by the SS wave receiving coil 11 and filtered by the band filter 12 becomes an input signal of the relay drive circuit 13. The relay drive circuit 13 compares the SS wave receiving coil output (a) with a preset threshold value, and energizes the relay 14 when the threshold value is exceeded. Then, as shown in (b), the relay 14 closes its normally open contact and turns on the power supply path from the battery power supply 15 to the message transmission circuit 16. This time is time t0 in FIG. Needless to say, the battery power supply 15 is always configured to be supplied with a minimum amount of power for maintaining the standby state of the information transmission unit including the message transmission circuit 16.

When the power supply path from the battery power supply unit 15 to the message transmission circuit 16 is turned on and the driving power is supplied, the message transmission circuit 16 calls the fixed information from the storage unit 23 and transmits the fixed information via the transmission coil 18 to the vehicle. It transmits to the upper child 21. In the message transmission circuit 16, the information transmission unit including the message transmission circuit 16 immediately enters a standby state at the time t1 when the transmission of the fixed information is finished. Accordingly, the current consumption of the battery power supply unit 15 is a minimum that is sufficient to maintain the information transmission unit including the message transmission circuit 16 in a standby state.

By the way, in general, the message processing capacity of the ATS on-board device 20 including the on-board transmitter / receiver 22 requires at least three messages in one reception. Therefore, in the first embodiment, as shown in FIG. 2C, the fixed information to be transmitted is one frame of one message, and only four frames are transmitted in consideration of a margin where four frames may be used.

When the vehicle equipped with the ATS onboard device 20 including the vehicle upper member 21 moves away from the ground child 10, the SS wave reception coil output (a) of the SS wave reception coil 11 decreases, and the threshold value is reached at time t2 in FIG. It becomes as follows. Then, the relay drive circuit 13 cuts off the exciting current to the relay 14 and turns off the relay contact (b). Therefore, at this time, the power supply path from the battery power supply unit 15 to the message transmission circuit 16 is turned off, and the drive power is not supplied to the message transmission circuit 16.

In this way, the power cableless ground unit 1 used in the on-vehicle speed check type ATS system of the first embodiment has the SS wave receiving coil 11 electromagnetically coupled to the on-board unit 41 of the vehicle 2 and the SS wave. At time t0 when the reception coil output (a) exceeds the threshold value, the drive power supply path from the battery power supply unit 15 to the information transmission unit including the message transmission circuit 16 is turned on. And the information transmission unit including the telegram transmission circuit 16 transmits predetermined fixed information from the transmission coil 18 to the vehicle upper member 21, and is configured to turn off the drive power supply path from the transmission coil to the information transmission unit. The system is configured to return to the standby state from time t1 when the transmission of the fixed information is completed.

Accordingly, the power cableless ground unit 10 used in the on-vehicle speed check type ATS system of the first embodiment always consumes only standby power, and is the minimum necessary for transmitting predetermined fixed information to the on-board unit. The message transmission circuit 16 of the information transmission unit 10 consumes driving power only for the time. Therefore, the battery life of the battery power supply unit 15 of the power cableless ground unit 10 used in the on-vehicle speed check type ATS system can be extended. The standby power for causing the power cableless ground unit 10 to rise up instantaneously is consumed, but compared with the drive power consumed by the message transmission circuit 16 when transmitting fixed information from the power cableless ground unit 1 Then there are very few things.

Incidentally, electromagnetic coupling between the vehicle upper member 21 and the SS wave receiving coil 11 may continue for a long time. For example, when the vehicle on which the ATS on-board device 20 is mounted stops and the on-board member 21 is maintained at a position where electromagnetic coupling with the SS wave receiving coil 11 is possible, or the ATS on-board device 20 is mounted. This is a case where the vehicle slowly passes over the power cableless ground element 1 and the electromagnetic coupling between the vehicle element 21 and the SS wave receiving coil 11 is longer than usual. However, even in such a case, the time when the drive power supply path from the battery power supply unit 15 to the message transmission circuit 16 is turned on at the time t0 when the SS wave receiving coil output (a) exceeds the threshold, and becomes the threshold or less. Time t0 is configured to turn off the driving power supply path at t2, and the telegram transmission circuit 16 transmits predetermined fixed information from the transmission coil 18 to the vehicle upper member 21, and transmission of the predetermined fixed information is completed. Is configured to return to the standby state. Therefore, even in such a case, the battery life of the battery power supply unit 15 of the power cableless ground unit 10 used in the on-vehicle speed check type ATS system is not shortened.

Further, in the power cableless ground unit 10 of the first embodiment, information can be transmitted between the power cableless ground unit 10 and the vehicle upper unit 21 so that the fixed information can be reliably received by the vehicle upper unit 21. The SS response reception range (Q) is made narrower than the response range (P). By doing in this way, naturally, in the position of FIG. 3 (A) where the vehicle upper element 41 is not electromagnetically coupled to the SS wave receiving coil 11 of the power cableless ground element 10, the power cableless ground element 10 Information transmission to the vehicle upper member 21 is not performed, but at the position of FIG. 3B where the vehicle upper member 21 is electromagnetically coupled to the SS wave receiving coil 11 of the power cableless ground child 10, the power cableless ground child is Information transmission from 10 to the vehicle upper member 21 is reliably performed. This is because, at the position shown in FIG. 3B, the distance between the power cableless ground element 10 and the vehicle upper element 21 is surely within the response range in which information can be transmitted.

DESCRIPTION OF SYMBOLS 10 Power cableless ground element 11 SS wave receiving coil 12 Bandpass filter 13 Relay drive circuit 14 Relay 15 Battery power supply part
16 Telegram transmission circuit 17 Storage unit 18 Transmission coil 20 ATS on-board device 21 On-board child 22 On-board transmitter / receiver

Claims (2)

An SS wave detection unit including an SS wave reception coil, an information transmission unit including an information wave transmission coil , and a battery power supply unit that supplies power to the information transmission unit via a drive power supply path , the SS wave is constantly transmitted. A power cableless ground unit used in an on-board speed check type ATS system having a vehicle unit for transmitting,
The SS wave detector, the SS wave detected through the SS wave receiving coils, the drive power supply paths when the case of exceeding the threshold value to turn on the drive power supply paths, was below the threshold Is to turn off
The information transmitting unit transmits predetermined fixed information from the transmission coil to the vehicle upper core, and when transmission of the predetermined fixed information is completed, the information transmitting unit returns to a standby state before the drive power supply path is turned off. A power cableless ground unit characterized by being. The information transmission unit and the SS wave detection unit of the power cableless ground unit are configured so as to narrow the reception response range of the SS wave than the response range in which information transmission between the power cableless ground unit and the vehicle upper unit is possible. The power cable-less ground element according to claim 1 .

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