KR100659706B1 - Error correction device of cross-induction form position and velocity detection system - Google Patents

Abstract

An apparatus for correcting an error in a system for detecting a position and a speed based on a cross-induction form is provided to improve reliability based on a calculation of a correct speed and position by detecting and correcting an error to an original signal when an error occurs. A first induction line is formed to be a square wave form and is installed on a side of a track. A second induction line is formed to be a square wave form having a half amplitude to a length of the first induction line, and a double amplitude to a width of the first induction line. First and second antennas(3a,3b) receive a high frequency voltage signal having a different frequency and amplitude induced from the first and second induction lines while a vehicle drives along a track. First and second amplifiers(4a,4b) amplify a high frequency voltage signal induced through the first and second antennas(3a,3b). First and second detectors(5a,5b) detect an envelope line of the high frequency voltage signal amplified through the first and second amplifiers(4a,4b). First and second schmitt triggers(6a,6b) convert a signal over than a predetermined voltage of the voltage detected by the first and second detectors(5a,5b) into a square wave signal. An error detection and correction unit(9) detects a noise signal included in the square wave signal outputted from the first and second schmitt triggers(6a,6b) as an error signal. The error detection and correction unit(9) corrects the error signal by removing the detected noise signal. A speed calculation unit(7) calculates a speed of a vehicle based on the square wave signal corrected and outputted from the error detection and correction unit(9). A position calculation unit(8) calculates a driving position of a vehicle based on an output signal of the speed calculation unit(7).

Description

Error correction device of cross-induction form position and velocity detection system

1 is a block diagram of a conventional cross-guided position and speed detection system.

2 is a block diagram of an apparatus of the present invention.

Figure 3 (a) (b) is a waveform diagram of a high frequency voltage signal induced in the first and second induction line of the apparatus of the present invention.

* Description of symbols on the main parts of the drawings *

1, 2: first and second guide lines

3a, 3b: first and second antenna

4a, 4b: first and second amplifier

5a, 5b: first and second detector

6a, 6b: first and second Schmitt triggers

7: speed calculator

8: position calculation unit

9: error detection and correction unit

The present invention relates to a device for compensating errors in a cross-guided position and speed detection system, and more particularly, to install a guide line having a predetermined width in a track at regular intervals and to flow a high frequency signal thereon to a vehicle. Influence on noise signals generated inside or outside the vehicle in the system that detects the position and velocity by the cross-induction method that detects the change of induced voltage when the mounted antenna passes and calculates the pulse to calculate the velocity or position. Received when the error occurs in the speed or position calculation to invent it to detect the exact position and speed of the vehicle.

In general, a wheeled vehicle among railroad cars uses an encoder or tachometer attached to the wheel to calculate the speed or position of the vehicle based on the magnitude of the pulse or voltage output during rotation.

In addition, in the track circuit method of the railway, the position detection of the vehicle is performed by a short circuit between the rail circuit and the steel wheel.

In this case, the track circuit uses a rail as a part of the track circuit to construct a circuit and control the signal, the line changer, the linkage, and other signal devices directly or indirectly by shorting between rails by the axle of the vehicle. Installed door An electric circuit for detecting the presence of a train.

The train detection information provided by such a track circuit is used for various purposes such as checking the operating position of a train, determining a track changer, adjusting train intervals, and operating a train.

However, a vehicle without contact with a rotating wheel or track, such as a magnetic levitation vehicle, cannot detect the speed or position of the vehicle using existing methods.

For this purpose, a method using a cross-guiding line or an antenna is mainly used.

Among these, the cross-induction method is installed by crossing a guide line having a constant width in a track at regular intervals, and a high frequency signal is flowed therein to detect a change in the induced voltage when the antenna mounted on the vehicle passes over the pulse. Calculate the velocity or position.

Such a conventional cross-guided position and speed detection system, as shown in Figure 1, has a configuration that is bent to have a square wave shape and installed in the opposite direction on the track of the ground two induction lines to which a high frequency signal is applied ( 1) (2); An antenna (3) for receiving a high frequency voltage signal induced by the induction line (1) (2) while the vehicle is traveling along the track; An amplifier (4) for amplifying the high frequency voltage signal induced through the antenna (3); A detector (5) for detecting an envelope of the high frequency voltage signal amplified by the amplifier (4); A Schmitt trigger (6) for converting a signal having a predetermined voltage or more among the voltages detected by the detector (5) into a square wave; A speed calculator (7) for calculating a traveling speed of the vehicle based on the square wave signal output from the Schmitt trigger (6); It is comprised by the position calculation part 8 which calculates the travel position of a vehicle based on the output signal of the said speed calculation part 7.

That is, in the conventional cross-guided method, guide lines (1) (2) composed of widened portions and narrowed portions at regular intervals as shown in FIG. 1 are installed on the ground track so as to face each other, and to the guide lines (1) (2). A high frequency signal is applied.

At this time, the antenna 3 is mounted on the vehicle, and when the vehicle proceeds on the guide lines 1 and 2, the antenna 3 has a widened portion and a narrowed portion of the cross guide lines 1 and 2. The change in induced voltage is detected.

The amplitude component of the high frequency signal guided to the antenna 3 appears large in the widened induction line (1) (2), and the combined voltage cancels each other so that the amplitude becomes '0'.

Using this, the high frequency voltage signal induced through the antenna 3 is amplified by the amplifier 4, and through the envelope detection process through the detector 5, a predetermined voltage signal is converted into a square wave signal using the Schmitt trigger 6. Will print.

Accordingly, the speed calculator 7 and the position calculator 8 can calculate and confirm the speed or position of the vehicle using the square wave signal.

In this case, a plurality of antennas or detection devices installed in the vehicle may be installed to increase the resolution of the speed and the position and calculate the forward and backward directions.

However, such a cross-guided position and velocity detection system has a configuration installed on the track of the ground in the state where the two guide lines (1) and (2) are bent into a square wave shape, and thus information obtained through the antenna (3). As shown in Figure 1 is made of a high and low signal of the "1" or "0" voltage.

By the way, while the vehicle is running, many noise signals are generated inside and outside the vehicle. As shown in the related art, two guide lines (1) and (2), which are bent to have a square wave shape, are installed in opposite directions on the track of the ground. When receiving the high frequency voltage signal induced through (3) and detecting the speed or position of the vehicle through the high frequency voltage signal, the high frequency voltage signal may be easily exposed to the noise signal which may occur inside and outside the vehicle as described above.

In this way, when the surrounding noise signal is introduced into the high frequency voltage signal, although the original signal of "1" or "0" may be reversed by the noise signal, the function of detecting and correcting this noise signal is conventionally provided. It is not equipped.

That is, the conventional cross-guided position and speed detection system adopts a method of counting frequencies or converting frequencies to calculate speed and position information using a high frequency voltage signal including noise signals. There is a problem that causes a lot of errors in calculating the position.

The present invention has been made to solve the above-mentioned conventional problems, and the shape of the first and second induction line is changed so that the frequency and amplitude of the high frequency voltage signal derived from the two induction lines are different from each other. 2 If a noise occurs from any part of the high-frequency voltage signal derived from the induction line, which is generated inside or outside of the vehicle, an error occurs, so that it can be detected and immediately corrected with the original signal, thereby correcting the speed and It is an object of the present invention to provide an error correction device of a cross-guided position and speed detection system that can calculate a position and greatly improve the reliability of the vehicle speed and position calculation.

In order to achieve the above object, the present invention provides an error correction apparatus for a cross-guided position and speed detection system comprising: a first guide line bent to have a square wave shape and installed on one side of a ground track; A second guide line bent into a square wave shape so as to have 1/2 and twice the width and length of the first guide line and installed on the other side of the ground track; First and second antennas having different frequencies and amplitudes while the vehicle is traveling along a track and receiving respective high frequency voltage signals induced in the first and second guide lines; First and second amplifiers for amplifying high frequency voltage signals of different frequencies and amplitudes induced through the first and second antennas, respectively, to a predetermined level; First and second detectors for detecting an envelope of the high frequency voltage signal amplified by the first and second amplifiers, respectively; First and second Schmitt triggers for converting a signal having a predetermined voltage or more among the voltages detected by the first and second detectors into square waves, respectively; An error detection and correction unit for correcting errors generated from noise signals included in square wave signals output from the first and second Schmitt triggers, respectively; A speed calculator configured to calculate a traveling speed of the vehicle based on a square wave signal output after the error is corrected through the error detection and correction unit; Characterized in that the position calculation unit for calculating the running position of the vehicle based on the output signal of the speed calculator.

At this time, the frequency and amplitude of the high frequency voltage signal induced in the second induction line is characterized in that it has twice the frequency and amplitude of the high frequency voltage signal induced in the first induction line.

In addition, the first and the second induction line is characterized in that the starting point is provided on the track rail so that the starting point of the high frequency voltage signal induced therein coincide with each other.

Hereinafter, one preferred embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 shows a block diagram of the device of the present invention, and FIG.

According to the present invention, there is provided a device comprising: a first guide line (1) bent to have a square wave shape and installed on one side portion above a ground track;

A second guide line (2) bent into a square wave shape so as to have 1/2 and twice the width and length of the first guide line (1) and installed on the other side of the ground track;

First and second antennas 3a and 3b which receive high frequency voltage signals induced at different frequencies and amplitudes from the first and second guide lines 1 and 2 while the vehicle is traveling along the track. )Wow;

First and second amplifiers (4a) (4b) for amplifying high frequency voltage signals induced through the first and second antennas (3a) (3b), respectively;

First and second detectors (5a) (5b) for respectively detecting envelopes of the high frequency voltage signals amplified by the first and second amplifiers (4a) (4b);

First and second Schmitt triggers (6a) (6b) for converting signals of a predetermined voltage or more among the voltages detected by the first and second detectors (5a) (5b) into square wave signals, respectively;

An error detection and correction unit (9) for correcting a noise signal included in each of the square wave signals output from the first and second Schmitt triggers (6a) and (6b) as an error signal;

A speed calculator (7) for calculating a traveling speed of the vehicle based on a square wave signal output after the error is corrected by the error detection and correction unit (9);

It is characterized by comprising a position calculating section 8 for calculating the running position of the vehicle based on the output signal of the speed calculating section 7.

In this case, the frequency and amplitude of the high frequency voltage signal induced in the second induction line 2 are characterized by having twice the frequency and amplitude of the high frequency voltage signal induced in the first induction line 1.

In addition, the first and second guide lines (1) and (2) are characterized in that they are provided on the track rails so that their starting points coincide with each other so that the start periods of the high frequency voltage signals induced therefrom are coincident with each other.

Referring to the operation and effect of the device of the present invention configured as described above are as follows.

First of all, the present invention includes an error correction device in a cross-guided position and speed detection system, and its configuration is largely composed of first and second guide lines (1) and (2) connected to a high frequency signal generator, Second antennas 3a and 3b, first and second amplifiers 4a and 4b, first and second detectors 5a and 5b, first and second Schmitt triggers 6a and 6b, It consists of the error detection and correction part 9, the speed calculation part 7, and the position calculation part 8.

At this time, the first guide line (1) has a configuration bent to have a square wave shape as in the conventional cross-guided position and speed detection system is installed on one side on the ground track.

Meanwhile, the second guide line 2 has a configuration in which the second guide line 2 is bent in a square wave shape so as to have 1/2 and 2 times the horizontal width and the vertical width of the first guide line 1, respectively, on the other side of the ground track. Is installed.

Therefore, the frequency and amplitude of the high frequency voltage signal induced in the second induction line 2 have twice the high frequency voltage signal induced in the first induction line 1.

At this time, the first and second guide lines (1) and (2) are to be coincident with the starting point of the guide lines when installed on both sides of the rail of the track so that the start periods of the high frequency voltage signals induced therefrom coincide with each other. Install.

Therefore, when the high frequency voltage signal induced in the first induction line 1 as shown in Fig. 3 (a) of the first and second induction line (1) (2) based on the second induction line (2) The high frequency voltage signal induced at will have twice the frequency and amplitude as shown in FIG.

Therefore, as described above, when the start of the period of the high frequency voltage signal induced by the first and second guide lines 1 and 2 coincide with each other and the upper end of the amplitude is aligned, the pattern as shown in FIG. 2 is obtained.

Through this pattern form, the high frequency voltage that the first and second antennas 3a and 3b of the vehicle detect when passing through the first and second inductive lines 1 and 2, that is, the inductive cross line, is described. Each has the form as shown in (a) and (b) of FIG. 3, and when the binary combination of the signal is expressed in decimal, it can be expressed as a number from "0" to 3 as shown in FIG.

Meanwhile, a detector for detecting an envelope of the high frequency voltage signal, including an antenna for receiving a high frequency voltage signal induced in the first and second guide lines 1 and 2, respectively, and a signal having a predetermined voltage or higher. Unlike the prior art, two Schmitt triggers for converting a square wave signal are installed.

That is, since the frequency and amplitude of the high frequency voltage signals induced by the first and second guide lines 1 and 2 are different from each other, an antenna and a detector for receiving them separately and converting them into detection and square wave signals And two Schmitt triggers, each configured to have two paths.

In this case, the first and second antennas 3a and 3b are installed side by side on both sides of the vehicle so as to bisect the maximum amplitude of the first and second guide lines 1 and 2 which are cross-guiding lines on the vehicle.

Accordingly, the first and second antennas 3a and 3b separately receive the high frequency voltage signals respectively induced in the first and second guide lines 1 and 2 while the vehicle is traveling along the track. do.

In addition, the first and second amplifiers 4a and 4b each having an input terminal connected to the output terminals of the first and second antennas 3a and 3b, respectively, are provided with the first and second antennas 3a. The high frequency voltage signals induced through 3b are amplified to a predetermined level and transmitted to the first and second detectors 5a and 5b.

The first and second detectors 5a and 5b detect envelopes of the high frequency voltage signals amplified by the first and second amplifiers 4a and 4b, respectively, to detect the first and second Schmitt triggers. 6a) and 6b.

Therefore, in the first and second Schmitt triggers 6a and 6b, an error detection for converting a signal of a predetermined voltage or more among the voltages detected by the first and second detectors 5a and 5b to a square wave signal, respectively. And the correction unit 9.

Therefore, the error detection and correction unit 9 checks the square wave signals output from the first and second Schmitt triggers 6a and 6b, and if the noise signal is included in the square wave signal, detects it as an error signal and removes it. In this way, the original signal can be corrected.

That is, the error detection and correction unit 9 is detected by being induced by the square wave pulse as shown in FIG. 3 (a) and detected by the second guide line 2. Combining square wave pulses such as (b) of 3 to binary to accurately detect and confirm whether the sequence is repeatedly increased or decreased from "0" to "3" as a decimal number. When an error or omission is detected, the noise signal is recognized in the corresponding signal and the noise signal is removed to correct the original signal.

Therefore, when the speed calculation unit 7 calculates the traveling speed of the vehicle based on the square wave signal output through the error detection and correction unit 9, the error detection and correction unit 9 already corrects the error. Since the speed can be calculated based on the square wave signal that is output, the speed of the vehicle can always be calculated accurately.

In addition, when the position calculating section 8 calculates the driving position of the vehicle based on the output signal of the speed calculating section 7, the error is already corrected through the error detecting and correcting section 9 as described above. After calculating the position based on the exact speed of the vehicle calculated by the speed calculator 7 based on the square wave signal outputted, the position can be accurately calculated while the vehicle is running.

This invention can be implemented in other various forms, without deviating from the mind or main characteristic. For this reason, the above-described embodiments are merely examples in all respects and should not be interpreted limitedly.

The scope of the present invention is shown by the scope of the claims, which are not limited by the specification text. Again, all variations and modifications belonging to the equivalent scope of the claims are within the scope of the present invention.

As described in detail above, according to the error correcting apparatus of the cross-guided position and speed detection system according to the present invention, the ground is installed in the track and the first and second induction lines for inducing a high frequency voltage signal to the on-board antenna Are formed so that the frequency and amplitude of the high-frequency voltage signal induced from each other are different from each other, and an error detection and compensation unit is provided between the first and second Schmitt triggers and the speed calculation unit. If any error occurs due to the noise signal generated inside or outside of the vehicle in any part of the induced high frequency voltage signal, it can be detected by the error detection and compensation unit and immediately corrected with the original signal. It is a very useful invention, such as greatly improving the reliability of the position calculation.

Claims (5)

A first guide line bent into a square wave shape and installed on one side of the ground track; A second guide line bent into a square wave shape so as to have 1/2 and twice the width and length of the first guide line and installed on the other side of the ground track; First and second antennas receiving high frequency voltage signals induced at different frequencies and amplitudes from the first and second guide lines, respectively, while the vehicle is traveling along a track; First and second amplifiers for amplifying high frequency voltage signals induced through the first and second antennas, respectively; First and second detectors for detecting an envelope of the high frequency voltage signal amplified by the first and second amplifiers, respectively; First and second Schmitt triggers for converting a signal having a predetermined voltage or more among the voltages detected by the first and second detectors into square wave signals, respectively; An error detection and correction unit for correcting a noise signal included in a square wave signal output from the first and second Schmitt triggers as an error signal and removing the noise signal; A speed calculator configured to calculate a traveling speed of the vehicle based on a square wave signal output after the error is corrected through the error detection and correction unit; And a position calculator configured to calculate a driving position of the vehicle based on the output signal of the speed calculator. The method according to claim 1, The frequency and amplitude of the high frequency voltage signal induced in the second induction line has twice the frequency and amplitude of the high frequency voltage signal induced in the first induction line. Device. The method according to claim 2, The error correction device of the cross-guided position and speed detection system, characterized in that the start point of the high frequency voltage signal induced in the first and second guide line to match the starting point and installed on the track rail. The method according to claim 3, The error detection and correction unit captures the square wave pulses that are induced and detected through the first and second guide lines in binary and detects whether they sequentially increase or decrease from "0" to "3" as decimal numbers. Error correction device of the cross-guided position and speed detection system, characterized in that it is determined whether the error caused by the signal. The method according to claim 4, The error detection and compensation unit combines the square wave pulses emitted from the first and second guide lines into binary numbers and sequentially increases or decreases the number from 0 to 3 as a decimal signal. Recognizing that a noise signal has been introduced into the error correction device of the cross-guided position and speed detection system, characterized in that to correct the original signal by removing the noise signal.

Images