JP2007237762A - Information transmission device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To accurately judge a position of a train in a train and both the train and ground with a simple constitution. <P>SOLUTION: Loop coils 5a, 5b, 5c having a plurality of roops different in the number of windings along a rail 4 in a prescribed section are laid in the rail 4. When control information transmitted from respective loop coils 5a-5c is received with an on-vehicle antenna 12 of a train 1, the variation in inductive voltage produced in the on-vehicle antenna 12 is detected by a reception level measuring part 8 to judge a position of the train 1. When train information transmitted from the on-vehicle antenna 12 is received with the loop coils 5a-5c, the variation in the inductive voltage produced in the loop coils 5a-5c is detected by a reception level measuring part 15 on the ground to detect the position of the train 1 even on the ground with high accuracy. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an information transmission device that exchanges information between the ground and a train, and more particularly, to improvement in stop position detection accuracy when a train is stopped at a fixed position.

  For example, Patent Document 1 and Patent Document 2 disclose information transmission apparatuses that exchange information between the ground and the train in order to stop the train at a fixed position. As shown in FIG. 5, the ground device of the information transmission device disclosed in Patent Document 1 includes a first loop coil 20 a and a first loop coil 20 a laid along the rail 4 between the rails 4 in a region where the train 1 is stopped. 2 loop coil 20b and 3rd loop coil 20c, transmission / reception device 21a-21c connected to each loop coil 20a-20c, and signal processing device 22 connected to each transmission / reception device 21a-21c, train 1 When the on-board element provided on the vehicle is electromagnetically coupled to each of the loop coils 20a to 20c, information is exchanged between the signal processing device 22 provided on the ground and the on-board device 3 mounted on the train 1.

  In this information transmission device, the signal processing device 22 provided on the ground determines that the position of the train 1 is in front of the fixed position stop region when the vehicle upper arm is electromagnetically coupled to the first loop coil 20a. As the stop position information, a short signal is transmitted from the transmission / reception device 21a to the train 1 via the first loop coil 20a. Further, when the upper arm of the vehicle is electromagnetically coupled to the second loop coil 20b, it is determined that the position of the train 1 is a fixed position stop region, and a just signal is transmitted from the transmission / reception device 21b to the second loop coil as train stop position information. It transmits to the train 1 via 20b. Further, when the upper arm of the vehicle is electromagnetically coupled to the third loop coil 20c, it is determined that the position of the train 1 has exceeded the fixed position stop region, and an over signal is transmitted from the transmission / reception device 21c to the third loop coil as train stop position information. It transmits to the train 1 via 20c. In this way, the stop position of the train 1 is detected.

Moreover, as shown in FIG. 6, the ground device of the information transmission apparatus disclosed in Patent Document 2 includes a first loop coil 23a having a stranded point a in the center and a stranded structure of the first loop coil 23a. In a region where the train is stopped by superimposing the second loop coil on the first loop coil and the second loop coil 23b having a twisted point at two locations b1 and b2 at positions different from the point a A transmission / reception device 25 is connected to the first loop coil 23a and the second loop coil 23b via a switch 24. In the steady state, the transmission / reception device 25 is connected to the first loop coil 23a. When the train 1 reaches the first loop coil 23a, the transmission / reception device 25 transmits / receives to / from the on-board device 3 via the first loop coil 23a. When 1 reaches the twisting point a of the first loop coil 23a and becomes no signal, the train 1 is stopped. At this time, the switch 4 is switched to the second loop coil 23b to transmit / receive to / from the on-board device 3 via the second loop coil 23b, and the train 1 reaches the twisting point b2 of the second loop coil 23b and there is no signal. Then, the switch 4 is switched to the first loop coil 23a, and transmission / reception is performed with the on-vehicle device 3 via the first loop coil 23a. The stop position of the train 1 is determined using the position between the stranded point a of the first loop coil 23a and the stranded point b1 of the second loop coil 23b as a fixed position stop region. When overrun, it is judged as overrun.
Japanese Patent Laid-Open No. 10-264814 JP 2001-171521 A

  As shown in Patent Document 1, a first loop coil 20a, a second loop coil 20b, and a third loop coil 20c are laid between the rails 4 in a region where the train 1 is stopped, and each of the loop coils 20a to 20c. When the stop position of the train 1 is determined by detecting that the vehicle upper is electromagnetically coupled, it is necessary to provide the transmission / reception devices 21a to 21c for each of the loop coils 20a to 20c, and the configuration of the device becomes complicated and expensive. There is a disadvantage of becoming.

  Further, as shown in Patent Document 2, when the signal transmitted to and received from the train 1 through the first loop coil 23a and the second loop coil 23b becomes no signal, the loop coils 23a and 23b When the connection of the transmission / reception device 25 is switched by the switch 4, the switching control of the switch 4 is not easy, and when the train 1 overruns and moves backward beyond the fixed position stop area, the fixed position stop area shifts. There are disadvantages.

  An object of the present invention is to provide an information transmission apparatus that improves such disadvantages and can accurately determine the position of a train on both the train and the train and the ground with a simple configuration.

  The information transmission device of the present invention includes a ground device, a vehicle-mounted device and a vehicle antenna mounted on a train, and the ground device includes a loop coil laid between the rails along the rail in a predetermined section, and a loop coil. The loop coil is provided with a plurality of loops with different numbers of turns at predetermined intervals, and the on-board device includes a transmission / reception unit, a reception level measurement unit, and a train position determination. The transmission / reception unit transmits train information to the loop coil via the on-board antenna and receives control information sent from the information transmission / reception device via the loop coil, and the reception level measurement unit passes through the loop coil. When the control information sent is received by the on-board antenna, the induced voltage generated at the on-board antenna is measured, and the train position determination unit is the on-board antenna measured by the reception level measurement unit. And judging the location of the train by the induced voltage.

  The plurality of loops having different numbers of turns of the loop coil include a loop provided in the fixed position stop region and loops provided before and after the loop.

  The information transmission / reception apparatus includes an information processing unit, a transmission / reception unit, a reception level measurement unit, and a train position determination unit. The information processing unit generates control information to be transmitted to the train, and the transmission / reception unit is generated by the information processing unit. The control information is sent to the loop coil, train information is received via the loop coil, and the reception level measuring unit generates an induced voltage in the loop coil when receiving the train information sent from the on-board antenna by the loop coil. The train position determination unit determines the train position based on the induced voltage of the loop antenna measured by the reception level measurement unit.

  In the present invention, when a loop coil having a plurality of loops having different winding numbers between rails is laid along a rail in a predetermined section and control information transmitted from each loop is received by an on-board antenna, the vehicle is By detecting a change in the induced voltage generated in the upper antenna and determining the position of the train, the position of the train can be controlled with high accuracy with a simple configuration.

  In addition, multiple loops with different numbers of windings of the loop coil have a loop provided in the fixed position stop region and loops provided before and after the loop so that the train stop position can be controlled with high accuracy by the train itself. Can do.

  In addition, when train information sent from the on-board antenna is received by the loop coil, the train stop position is determined on the ground with high accuracy by detecting changes in the induced voltage generated in the loop coil. Can be detected.

  FIG. 1 is a block diagram showing the configuration of the information transmission apparatus of the present invention. The information transmission device stops the train 1 in a fixed position stop area of the station, and includes a ground device 2 and an on-board device 3 mounted on the train 1.

  The ground device 2 includes a loop coil 5 laid between the rails 4 along the rail 4 in a predetermined section including the fixed position stop region, and an information transmission / reception device 6 that exchanges information with the on-board device 3 via the loop coil 5. Have The loop coil 5 is provided with a plurality of loops having different winding numbers, for example, three loops 5a, 5b, and 5c at predetermined intervals in a fixed position stop region and a predetermined region before and after the fixed position stop region. The number of turns of the three loops 5a, 5b, and 5c is such that when the portion other than the loops 5a, 5b, and 5c of the loop coil 5 has one turn, for example, the loop 5a has two turns, the loop 5b has three turns, and the loop 5c has four turns. The loop 5b is provided in the fixed position stop region.

  As shown in the block diagram of FIG. 2, the on-board device 3 includes a transmission / reception unit 7, a reception level measurement unit 8, a train position determination unit 9, a processing unit 10, and a control unit 11. The transmission / reception unit 7 transmits the train information of the frequency f1 to the ground loop coil 5 via the on-board antenna 12 and receives the control information of the frequency f2 sent from the ground information transmission / reception device 6 via the loop coil 5. . The reception level measuring unit 8 measures the induced voltage V generated in the on-board antenna 12 when the on-board antenna 12 receives control information of the frequency f2 sent from the ground information transmitting / receiving device 6 through the loop coil 5. . The train position determination unit 9 determines the stop position of the train 1 based on the induced voltage V of the on-board antenna 12 measured by the reception level measurement unit 8, and the two threshold voltages Vth1 and threshold voltage for position determination in advance. When Vth2 is set and the induced voltage V of the on-board antenna 12 measured by the reception level measuring unit 8 is larger than the threshold voltage Vth1 and smaller than the threshold voltage Vth2, it is determined that the position of the train 1 is in the fixed position stop region To do. The processing unit 10 generates train information to be transmitted by the transmission / reception unit 7 and refers to the control information received by the transmission / reception unit 8 and the position information of the train 1 determined by the train position determination unit 9, and the speed pattern of the train 1 A fixed position stop control pattern is generated. The control unit 11 controls the speed and stop position of the train 1 based on the speed pattern and the fixed position stop control pattern generated by the processing unit 10.

  Processing when determining the stop position of the train 1 using this information transmission device will be described.

  The transmission / reception unit 7 of the on-board device 3 mounted on the train 1 constantly sends train information of the frequency f1 having a vehicle number and the like to the on-board antenna 12 and transmits it from the on-board antenna 12 to the ground. The train 1 enters the position of the loop coil 5 laid from the front in the traveling direction of the train 1 from the fixed position stop area, and is transmitted from the vehicle antenna 12 by the information transmitting / receiving device 6 provided on the ground. When the train information is received via the loop coil 5, the information transmitting / receiving device 6 sends control information of the frequency f 2 corresponding to the received train information to the loop coil 5. The on-board antenna 12 receives the control information transmitted to the loop coil 5 and sends the received control information to the transmission / reception unit 7. The transmission / reception unit 7 processes the sent control information and sends it to the processing unit 10. The processing unit 10 generates a fixed position stop control pattern based on the sent control information and sends it to the control unit 11. The control unit 11 controls the speed of the train 1 based on the sent fixed position stop control pattern.

  When the transmission / reception unit 7 of the on-board device 3 receives the control information transmitted from the loop coil 5 on the ground, the reception level measurement unit 8 uses the control information on the frequency f2 transmitted from the loop coil 5 to detect the on-board antenna. 12 is measured, and the measured induced voltage V is sequentially sent to the train position determination unit 9. The induced voltage V measured by the reception level measuring unit 8 becomes an initial voltage V0 as shown in FIG. 3 when reception of control information transmitted from the loop coil 5 by the on-board antenna 12 is started. ing. When the train 1 travels in this state and reaches the vicinity of the fixed position stop area and stops, the on-board antenna 12 reaches the position of the loop 5a of the loop coil 5 and receives the control information transmitted from the loop 5a. When the number of turns of the loop coil 5 other than the loops 5a, 5b, and 5c is 1 turn, for example, the number of turns of the loop 5a is 2 turns, so that the transmission current of the loop 5a increases in proportion to the number of turns. As shown in FIG. 2, the induced voltage V of the on-board antenna 12 measured by the reception level measuring unit 8 becomes as large as the voltage V1. The train position determination unit 9 compares the induced voltage V sent from the reception level measuring unit 8 with the initial voltage V0. When the induced voltage V changes and becomes a voltage V1 higher than the initial voltage V0, the train position determination unit 9 is set in advance. When the induced voltage V1 sent is smaller than the threshold voltage Vth1, it is determined that the position of the train 1 is in front of the fixed position stop area, and a short signal is processed as train position information. Send to part 10. When a short signal is sent as train position information, the processing unit 10 sends a stop position correction signal to the control unit 11 to correct the stop position of the train 1 and to transmit it from the transmission / reception unit 7 to the ground.

  Further, when the train 1 travels and exceeds the fixed position stop region and receives the control information transmitted from the loop 5c of the loop coil 5 by the on-board antenna 12, as shown in FIG. The induced voltage V of the on-vehicle antenna 12 measured in (1) is increased to a voltage V3. The train position determination unit 9 compares the induced voltage V3 sent from the reception level measuring unit 8 with preset threshold voltages Vth1 and Vth2, and when the induced voltage V3 is larger than the threshold voltage Vth2, the position of the train 1 is It is determined that the vehicle has gone too far from the fixed position stop area, and an over signal is sent to the processing unit 10 as train position information. When an over signal is sent as train position information, the processing unit 10 sends a stop position correction signal to the control unit 11 to correct the stop position of the train 1 and to transmit it from the transmission / reception unit 7 to the ground.

  When the on-board antenna 12 reaches the position of the loop 5b of the loop coil 5 and receives control information transmitted from the loop 5b by the correction of the stop position of the train 1, as shown in FIG. The induced voltage V of the on-vehicle antenna 12 measured in (1) is increased to a voltage V2. The train position determination unit 9 compares the induced voltage V2 sent from the reception level measuring unit 8 with the preset threshold voltages Vth1 and Vth2, and the sent induced voltage V2 is larger than the threshold voltage Vth1 and more than the threshold voltage Vth2. When it is small, it is determined that the position of the train 1 is in the fixed position stop region, and a just signal is sent to the processing unit 10 as train position information. When a just signal is sent as train position information, the processing unit 10 sends a stop signal to the control unit 11 to stop the train 1 and transmit it from the transmission / reception unit 7 to the ground. The ground information transmitter / receiver 6 determines that the train 1 has stopped in the fixed position stop area when a just signal is sent via the loop coil 5.

  In this way, three loops 5a, 5b, and 5c having different numbers of windings are provided between the rails 4 along the rail 4 in a predetermined section including the fixed position stop region, in the fixed position stop region and the predetermined region before and after the fixed position stop region. A loop coil 5 is laid, and when the control information transmitted from each of the loops 5a, 5b, 5c is received by the on-board antenna 12, a change in the induced voltage V generated in the on-board antenna 12 is detected to stop the train 1 Since the position is determined, the stop position of the train 1 can be controlled with high accuracy with a simple configuration.

  In the above description, the case where the on-board device 3 detects the stop position of the train 1 has been described. However, as shown in the block diagram of FIG. A level measurement unit 15 and a train position determination unit 16 are provided, and train information transmitted from the transmission / reception unit 7 of the on-board device 13 via the on-board antenna 12 is received by portions other than the loops 5a, 5b, and 5c of the loop coil 5. Then, a change in the reception level when received by the loops 5a, 5b, and 5c may be measured by the reception level measurement unit 15 and the position of the train 1 may be determined by the train position determination unit 16. In this way, the information transmission / reception device 6 can also determine the stop position of the train with high accuracy.

  Moreover, although the said description demonstrated the case where the loop coil 5 was provided in the vicinity including the fixed position stop area | region of a station, the loop coil 5 was detected in the fixed point area | region which detects the position and traveling direction of a train other than the fixed position stop area | region of a station. May be provided.

It is a block diagram which shows the structure of the information transmission apparatus of this invention. It is a block diagram which shows the structure of a vehicle-mounted apparatus. It is a change characteristic figure of the induced voltage of a vehicle-mounted antenna. It is a block diagram which shows the structure of the information transmission / reception apparatus on the ground. 1 is a configuration diagram of an information transmission device disclosed in Patent Document 1. FIG. 1 is a configuration diagram of an information transmission device disclosed in Patent Document 2. FIG.

Explanation of symbols

1; train, 2; ground device, 3; on-board device, 4; rail, 5; loop coil,
5a, 5b, 5c; loops with different numbers of windings; 6; information transmitting and receiving device; 7; transmitting and receiving unit;
8; reception level measurement unit, 9; train position determination unit, 10; processing unit, 11; control unit,
12; On-board antenna, 13; Information processing unit, 14; Transmission / reception unit,
15; Reception level measurement unit, 16; Train position determination unit.

Claims (3)

It has an on-board device and an on-board antenna mounted on the ground device and train,
The ground device has a loop coil laid between the rails along the rail in a predetermined section, and an information transmission / reception device that exchanges information with the train via the loop coil, and the loop coil has a plurality of winding numbers different from each other. Loops are provided at predetermined intervals,
The on-board device includes a transmission / reception unit, a reception level measurement unit, and a train position determination unit, and the transmission / reception unit transmits train information to the loop coil via the on-board antenna and from the information transmission / reception device. The control information sent through the loop coil is received, and the reception level measuring unit generates an induced voltage generated in the on-board antenna when the on-board antenna receives the control information sent through the loop coil. The information transmission device is characterized in that the train position determination unit determines the position of the train based on the induced voltage of the on-board antenna measured by the reception level measurement unit.   The information transmission device according to claim 1, wherein the plurality of loops having different numbers of turns of the loop coil include a loop provided in a fixed position stop region and loops provided before and after the loop.   The information transmission / reception apparatus includes an information processing unit, a transmission / reception unit, a reception level measurement unit, and a train position determination unit, the information processing unit generates control information to be transmitted to a train, and the transmission / reception unit is the information processing unit. When the generated control information is sent to the loop coil, train information is received via the loop coil, and the reception level measuring unit is receiving train information sent from the on-board antenna by the loop coil. The induced voltage generated in the loop coil is measured, and the train position determining unit determines the position of the train based on the induced voltage of the loop antenna measured by the reception level measuring unit. Information transmission equipment.

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