JP3055966B2 - Point detection system using permanent magnet signs - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a point detection system for detecting the traveling point of a vehicle traveling on a vehicle track.

[0002]

2. Description of the Related Art Conventionally, for various traveling controls in a vehicle such as a so-called pendulum control for inclining a vehicle body in a curved portion of a vehicle trajectory and a speed control for operation management.
Various point detection systems for detecting a point where a vehicle is currently traveling have been proposed.

For example, Japanese Unexamined Patent Publication No. Sho 60-157957 discloses that, in a vehicle orbit set by a well-known ATS (Automatic Train Stop System), a ground point of the ATS is used to determine a location of the ground point. It is known that the starting point of the mileage of the vehicle is used to prevent the mileage calculated on the vehicle from being long based on data from the speed generator, thereby improving the accuracy of point detection. .

[0004] However, this detection system cannot identify the position of the detected ground child by merely detecting the ground child. Therefore, the position information of the candidate ground element is compared with the distance data from the speed generator. If the distance data falls within a predetermined range based on the position information of the ground element, the candidate ground element is identified. It was a mechanism to be done. As described above, there has been a problem that the ground element cannot be specified unless the distance data from the speed generator is compared.

Therefore, for example, Japanese Patent Application Laid-Open No. 2-290102
As disclosed in Japanese Unexamined Patent Publication (Kokai) No. H10-260, there has been known an apparatus using a so-called absolute label. In this method, a signal generating means for generating a radio signal unique to each fixed point is provided at a fixed point on a vehicle track, and a signal detecting means for receiving a radio signal and position information of each fixed point are stored in the vehicle in advance. Storage means.

Then, a radio signal is detected on the vehicle, position information corresponding to a fixed point specified by the radio signal is called from a storage means, and distance data from the speed generator starting from the fixed point is obtained. The point is detected by adding to the position information of the fixed point. In this way, the inconvenience that occurs when the above-described ground child is used, such as which ground child cannot be specified without comparison with the distance data from the speed generator, is eliminated.

[0007]

However, in a conventional device in which a signal generating means for generating a radio signal or the like unique to each fixed point is provided at a fixed point on a vehicle track, a radio signal is generated by such signal generating means itself. And a power supply and the like were required. For this reason, the equipment is complicated and costly, and it is necessary to perform maintenance and inspection on whether the radio signal is normally generated without any trouble or the like.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-mentioned problems, and to achieve easy and accurate point detection by so-called absolute signs, but to eliminate the need for maintenance and inspection of the signs installed at each fixed point. It is to provide a point detection system using a sign.

[0009]

In order to achieve the above object, the present invention has the following structure as means for solving the problems. That is, the vehicle includes a storage unit that stores position information of a plurality of fixed points on a vehicle track and a traveling distance calculation unit that calculates a traveling distance of the vehicle. in point detection system by adding the travel distance from a fixed point to calculate the position of the vehicle, the each fixed point, the permanent magnet labeled composed of permanent magnets, car polarity arrangement pattern of the permanent magnets for each of the fixed point
Provided with by different along both the traveling direction, the polarity
The array pattern is the two longest positions on the front side in the vehicle traveling direction.
The permanent magnets have different polarities, and the vehicle is provided with fixed point specifying means for detecting a polarity array pattern of the permanent magnets based on a change in the polarity of the permanent magnet marking and specifying the fixed point. , The fixed point specifying means:
Two poles having different polarities on the front side in the vehicle traveling direction.
Identify the polarity array pattern based on the distance between the magnets
Is it configured point detection system using a permanent magnet indicator, characterized by.

[0010]

In point detection system using a permanent magnet labels of the present invention [act] having the above structure, the plurality of fixed points on the vehicle track, a permanent magnet labeled composed of permanent magnets,
Polarity sequence pattern vehicle advancing direction of the permanent magnets for each fixed point
Along the direction and
The two polar arrangement patterns are the two closest to the front in the vehicle traveling direction.
The polarities of the permanent magnets are different .

Then, the fixed point specifying means provided in the vehicle detects the polarity arrangement pattern of the permanent magnet from the change in the polarity of the permanent magnet marker, and specifies which fixed point. The position of the vehicle is calculated by adding the travel distance from the fixed point of the vehicle calculated by the travel distance calculation means to the position information of the specified fixed point. At that time, the fixed point identification means
The distance between two permanent magnets with different polarities
A polar array pattern is specified as a reference.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a block diagram showing a schematic configuration of a point detection system using a permanent magnet marker according to one embodiment of the present invention. A plurality of fixed points on the track of the vehicle 1, in this embodiment, permanent magnet markers 4 are provided on the side surfaces of the platform 2 of each station.

The permanent magnet marker 4 is shown in FIGS.
As shown in (a), the permanent magnets are arranged so that the polarities of the permanent magnets differ along the traveling direction of the vehicle 1. In the case shown in FIG. 2A, the N-pole, S-pole, N-pole, N-pole,
The poles and the N poles are arranged in parallel and at equal intervals with the ground in the order of poles. The arrangement pattern of the polarities of the permanent magnets 6 differs from place to place.

On the vehicle 1 side, a Hall sensor 8, an encoding unit 10, a storage unit 12, a speed generator 16, a mileage calculating unit 18, and an adding unit 20 are provided. The Hall sensor 8 converts a magnetic quantity into an electric quantity.
The vehicle 1 travels while facing the permanent magnet marker 4 when the vehicle 1 travels.

As shown in FIG. 2B, the output from the Hall sensor 8 is an analog signal output to the plus side when the N pole is detected and to the minus side when the S pole is detected. can get. Then, this analog signal is input to the encoding means 10. The encoding means 10 converts the input analog signal into a quantized signal by providing a predetermined dead zone W to remove the influence of noise, and further converts the analog signal into "1" when the quantized signal is positive and "-" when the quantized signal is negative. "0" in case
Is converted into a binary signal. In the case shown in FIG. 2A, six permanent magnets 6 are arranged, each of which is converted into a binary signal and output to the storage means 12 as a sign number consisting of a six-digit code string.

The storage means 12 stores position information corresponding to each of a plurality of fixed points on the track on which the permanent magnet marker 4 is provided. The position information is a distance from a reference point such as a starting station to a corresponding fixed point in this embodiment, and the position information corresponding to the sign number input from the encoding unit 10 is output to the adding unit 14. Is configured.

On the other hand, a speed generator 16 is provided on the wheel, and is configured to output a rotation pulse corresponding to the rotation speed of the wheel to the traveling distance calculating means 18. The mileage calculating means 18 is configured to calculate the mileage of the vehicle 1 by, for example, counting the number of rotation pulses input within a predetermined distance measurement time, and output the calculated mileage to the adding means 14.

The adding means 14 adds the position information inputted from the storage means 12 and the traveling distance inputted from the traveling distance calculating means 18 and outputs the result as point information of the vehicle 1. Next, the operation of the thus configured point detection system of the present embodiment will be described. When the vehicle 1 travels in the direction of arrow A in FIG. 2A and the hall sensor 8 passes by facing the permanent magnet marker 4, an analog signal as shown in FIG. Is output. Then, as shown in FIG.
0 is quantized and encoded, and the code string “10110
"1" is output as the sign number.

In this embodiment, the first permanent magnet 6 is N
The pole and the second permanent magnet 6 are S poles, and are arranged so that their polarities are different from each other. Then, in FIG. 2 (b), by determining the number of digits of the encoding based on the interval between the first local maximum value and the next local minimum value, as shown in FIG. Even if both the sixth and fourth permanent magnets 6 have N poles, a two-digit code string “11” is output as corresponding to them, as shown in FIG. 2C.

The storage means 12 retrieves position information corresponding to the fixed point specified by the sign number "101101" input from the encoding means 10, and calculates the distance from the reference point to the fixed point where the permanent magnet sign 4 is provided. Is output to the adding means 14.

The point information at an arbitrary position between the fixed points is calculated as follows. The travel distance calculating means 18 calculates the travel distance of the vehicle 1 by counting the number of rotation pulses input within a predetermined distance measurement time. The measurement start point is reset each time the vehicle passes a fixed point, The fixed point that passed immediately before is always the measurement start point.

For this reason, the distance from the reference point to the fixed point passed immediately before is input from the storage means 12 to the adding means 14 as position information, and the traveling distance from the fixed point passed immediately before to the current position is calculated as the traveling distance. It is input from the calculating means 18. Then, the position information and the traveling distance are added by the adding means 14, and the point information of the vehicle 1 is calculated.

On the basis of the point information thus calculated, various traveling controls of the vehicle 1, such as a so-called pendulum control for inclining the vehicle body in a curved portion of the track and a speed control for operation management, can be performed. . In this way, the position information is reset every time the vehicle passes the fixed point,
Since the position information of the immediately preceding fixed point is input from, there is no error in the distance from the reference point to the immediately preceding fixed point. Therefore, even if an error occurs, the error is only in a portion related to the traveling distance from the fixed point that has just passed to the current position by the traveling distance calculating unit 18. Therefore, more accurate point detection can be performed, and the traveling control of the vehicle based thereon can be performed with higher accuracy.

The permanent magnet marker 4 used for the point detection is composed of only the permanent magnet 6, and is different from the conventional one provided with signal generating means for generating a unique radio signal or the like for each fixed point. There is no need for a device for generating a signal or the like or a power supply. Therefore, the permanent magnet marker 4 of this embodiment may be simply provided on the platform 2 or the like, and the equipment is simple and the cost is low, and the maintenance and inspection are almost unnecessary.

In the conventional point detection system using the grounding element as a marker, there is no inconvenience that the grounding element cannot be specified unless the distance data from the speed generator 16 is compared. The fixed point can be specified only by detecting the magnetic quantity from the marker 4 with the Hall sensor 8 and encoding the same by the encoding means 10.

As described above, the present invention is not limited to such embodiments at all, and can be implemented in various modes without departing from the gist of the present invention. For example, although the permanent magnet marker 4 of the present embodiment is constituted by a plurality (six) of permanent magnets 6, one permanent magnet 6 having a different polarity depending on a portion may be used. Further, in the present embodiment, the permanent magnet marker 4 is provided on the side surface of the platform 2 of the station. However, the present invention is not limited to this location. For example, the permanent magnet marker 4 is placed on the track of the vehicle 1. May be provided on the lower surface of the device for detection. In this way, if the permanent magnet marker 4 is provided in a large amount before entering a curve, not only at a station, pendulum control can be performed with higher accuracy.

[0027]

In point detection system using a permanent magnet indicator of the invention as described in detail above, according to the present invention, the difference of the polarity arrangement pattern of the permanent magnets for each fixed point is along the vehicle traveling direction
And the polar arrangement pattern
Is the polarity of the two permanent magnets closest to the vehicle in the direction of travel.
The fixed point specifying means detects the polarity arrangement pattern of the permanent magnet from the change in the polarity in the permanent magnet label to specify which fixed point, and calculates the traveling distance in the position information of the specified fixed point. The position of the vehicle is calculated by adding the travel distance from the fixed point of the vehicle calculated by the means.
Therefore, while achieving simple and accurate point detection using so-called absolute signs, the permanent magnet signs provided at each fixed point are not mechanical using auxiliary equipment such as a power supply. Is almost unnecessary. And the fixed point specifying means is:
Two permanent magnets with different polarities on the front side in the vehicle traveling direction
Identify polar array patterns based on stone spacing
Therefore, the characteristic accuracy is improved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of a point detection system using a permanent magnet marker according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram for explaining a process of encoding an analog signal from a Hall sensor.

[Explanation of symbols]

1: Vehicle 4: Permanent magnet sign
6 ... permanent magnet 8 ... Hall sensor 10 ... coding means 1
2 ... storage means 16 ... speed generator 18 ... travel distance calculation means
20 ... Addition means

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-290102 (JP, A) JP-A-2-2-28787 (JP, A) JP-A-2-80912 (JP, A) JP-A-59-1982 202513 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) B61L 1/00-23/34 G05D 1/02

Claims (1)

(57) [Claims] 1. A vehicle, comprising: storage means for storing position information of a plurality of fixed points on a vehicle track; and travel distance calculating means for calculating a travel distance of the vehicle, wherein the position information of the fixed points includes In a point detection system that calculates a position of the vehicle by adding a traveling distance of the vehicle from the fixed point, a permanent magnet marker including a permanent magnet is provided at each of the fixed points.
The polarity arrangement pattern of the permanent magnets for each of the fixed point vehicle proceeds
It is provided differently along the row direction and the polar arrangement
The pattern consists of two permanent magnets on the front side in the vehicle traveling direction.
The polarity of the stone is made different, the vehicle is provided with fixed point specifying means for detecting the polarity array pattern of the permanent magnet from a change in the polarity of the permanent magnet sign, and specifying the fixed point , The fixed point feature
Determining means for detecting a difference in polarity on the most front side in the vehicle traveling direction.
The polarity array pattern based on the distance between two permanent magnets.
A point detection system using permanent magnet markers, characterized by identifying a site.