KR20010028319A - System and method to detect q of ats - Google Patents

Abstract

PURPOSE: An apparatus and method for measuring the quality factor of a terrestrial unit of an automatic train stopper are provided which is mounted on a train to rapidly and accurately detect resonance frequency and cut-off frequency using frequency-phase characteristic between an input signal and output signal of the terrestrial unit while the train traveling normally. CONSTITUTION: An apparatus for measuring the quality factor of a terrestrial unit of an automatic train stopper includes a signal input unit for amplifying an input signal with a predetermined frequency to apply the amplified signal to the terrestrial unit, and a signal detector for detecting the output signal of the terrestrial unit. The apparatus further has a quality factor detector constructed of a phase locked loop for fixing the phase difference between the input signal applied to the signal input unit and the output signal of the signal detector to -45 deg.(or 45 deg.), -90 deg.(or 90 deg.) and -135 deg.(or 135 deg.), and detecting frequencies of the input signal with respect to the phase differences to calculating the quality factor. The apparatus also includes a display(210) for displaying the quality factor, and a storage unit(220) for storing the quality factor in a database.

Description

Automatic coefficient measuring device for train stopper (HT) Ground control system and its control method {SYSTEM AND METHOD TO DETECT Q OF ATS}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a device for measuring the selection coefficient (QUALITY FACTOR: hereinafter referred to as Q) of a train automatic stopper (hereinafter referred to as ATS). Fast and accurate detection of resonance frequency and cutoff frequency (within 0.707 times the resonance frequency) using the frequency-phase characteristic between the input signal and the output signal input to the ground person while driving at high speed The Q value is calculated from the detected resonant frequency and the cutoff frequency and displayed on the display device, and the data is converted into a database to make the Q measurement and management of the ground person easy and quick.

As is well known, the ATS includes, as shown in Figs. 1 and 2, a grounder 11 composed of a capacitor C and a coil L and constituting an LC resonant circuit; Relays (RL ₁ , RL ₂ ,,, RL _n-1 , RL _n ) and capacitors (C ₁ , C ₂ ,,,, C _n- ) turned on / off by a predetermined control signal ₁ , C _n ), and because a plurality of capacitors C of the ground 11 are connected in parallel, the capacitance of the ground 11 is changed by a predetermined control signal to change the resonance frequency. A ground magnetic control relay 12; The relays RL ₁ , RL ₂ ,,, RL _{n − of the} terrestrial control relay 12 are selectively connected to the terrestrial control relay 12 to generate a predetermined relay control signal which is a speed command signal. ₁ , RL _n and a ground unit 10 composed of a signal 13 for controlling a traffic light and the like;

A primary box 21 in which primary coils and secondary coils are inductively coupled to a predetermined coupling degree to sense a resonance frequency of the ground wave 11 by frequency induction; It consists of an amplifying circuit section and an oscillating circuit section, and performs oscillation at a predetermined frequency (for example, 78 kHz) to feed back through the coil of the vehicle box 21, and simultaneously oscillate the frequency of the coil of the vehicle box 21. An oscillator 22 to amplify; A frequency detector (24) for detecting and outputting a frequency output from the oscillator (22) because it is composed of a plurality of band pass filters (BAND PASS FILTER) and the like and connected to the oscillator (22); A speed detector 23 attached to the wheel side of the train to detect a traveling speed of the train; When the signal input from the frequency detector 24 and the speed detector 23 is compared and judged by a predetermined method, a predetermined alarm control when the actual speed of the train exceeds the speed commanded by the ground apparatus unit 10. A logic judgment control device 26 for generating a signal; Connected to the logic determination control device 26, when an alarm control signal is generated in the logic determination control device 26, an alarm sound and a display control signal are generated for a predetermined time, and then the actual train An alarm device 27 for generating a predetermined braking signal when the speed does not become smaller than the driving instruction speed; An emergency brake 28 connected to the alarm device 27 for braking the train when a braking signal is generated from the alarm device; Connected between the alarm device 27 and the logic judgment control device 26, when a display control signal is generated in the alarm device 27, a visual alarm is displayed, and a recovery command can be commanded by the driver. In this case, it is composed of an on-vehicle device section 20 composed of a display control device 25 which transmits the signal to the logic determination control device 26 and simultaneously displays a predetermined signal generated by the logic determination control device 26. The track occupancy state of the preceding train, that is, the distance between the preceding train and the following train is calculated to calculate the traveling speed of the following train, and the resonant frequency of the grounder 11 is changed and transmitted to the vehicle box. It is a device that controls the running speed of the train.

For example, as shown in Table 1, the ATS having five signal types (G signal, YG signal, Y signal, YY signal, and R signal) has operation characteristics as shown in FIG.

3 is a diagram showing the driving curve of the national railway ATS operating in the five signal forms, with five grounders interlocked with each other using a track section in which one grounder is installed as a unit to limit the maximum speed of the train. It is present.

That is, assuming that there is a preceding train in the right-hand ground installation section (R signal section), if a following train enters the installation section, the train should be stopped within a predetermined time (for example, 5 seconds). When the "R signal" is generated, and the train is not stopped within the 5 seconds, the train is stopped by the emergency brake 28.

In addition, when the train enters the "YY signal section" which is the next section in which the preceding train exists, the maximum speed of operation is limited to 25 km / h. The train is stopped by the brake 28.

The "Y signal section" and "YG signal section" continuous to the "YY signal section" is also limited by the maximum speed of the following train due to the above operating principle, the grounder installation section where the preceding train exists The maximum speed limit is freed within the safe driving speed of the train only when the "G signal section" is interposed between the four installation sections.

As described above, the ATS responds by changing the resonance frequency of the grounder 11 to the maximum speed limit of the train set according to the track occupancy state of the preceding train (i.e., set according to the distance from the preceding train). After varying, the frequency of the response is received at the vehicle box 21 by the frequency pulling phenomenon to control the speed of the train.

Here, sensing the driving speed (indicated by the variable of the resonance frequency) commanded by the ground person 11 in the vehicle box 21 by the frequency induction phenomenon is called oscillation, and the resonance frequency at this time is called the oscillation frequency. The non-detection is called non-response.

At this time, in order to accurately receive the response frequency (resonance frequency) displayed on the ground 11 in the vehicle box 21, Q of the ground 11 should maintain an appropriate value.

This will be described in detail as follows.

As is well known, Q represents the sharpness of the resonance curve, that is, the frequency selectivity of the resonant circuit. In a series RLC resonant circuit such as the ATS ground, Q is the ratio of reactance to resistance at the operating frequency of the coil (ωL / R = 2πfL / R, where ω is the angular frequency, L is the reactance component, R is the resistance component, and f is the frequency.) In the case of grounders, the resistance is changed and Q is mostly changed. Equation 1 shows the Q of the ground man.

Where ω ₀ is the resonance frequency, ω ₁ is the first cutoff frequency (CUTOFF FREQUENCY), ω ₂ is the second cutoff frequency, and B is the bandwidth between the cutoff frequencies, respectively (see FIG. 4).

The first blocking frequency ω ₁ and the second blocking frequency ω ₂ are 0.707 times the magnitude of the resonance frequency.

On the other hand, the higher ground Q means a higher selectivity of the resonant frequency and less error to be mistaken for other signals. On the contrary, the lower Q means a wider bandwidth between the first cutoff frequency and the second cutoff frequency. Means that there is a high probability of mistaken for a frequency representing another signal. Also, if the Q value is too large, the detection becomes difficult.

5A shows a case where the distinction between the response frequencies is high due to the high Q, and FIG. 5B shows that the distinction between the response frequencies is unclear because of the low Q.

If the distinction between the response frequencies becomes unclear, when the vehicle detects it, it may be mistaken for another signal, resulting in driving delay or collision.

For example, even though a "YY signal" for driving at a maximum speed of 25 km / h or less occurs on the ground, an accident occurs that the vehicle recognizes the "Y signal" and collides with a preceding train, or "R signal." Recognized as "stopping the train operation will cause delays.

For reference, in the case of national railway ATS operating in five signal types, the allowable range of resonance frequency (response frequency) is 98 ± 3KHz (G signal), 106 ± 3KHz (YG signal), 114 ± 3KHz (Y signal), 122 ± 3KHz (YY signal), 130 ± 3KHz (R signal), and the appropriate Q value when the resonant frequency is 130KHz is between 110 and 170 depending on the type of ATS.

As described above, in the ATS grounder, the Q value is an important factor that should always be kept above a certain value for the efficiency and safety of train operation. For this purpose, the Q value should be periodically measured and adjusted.

In the conventional method of measuring the Q value of the ground, the primary coil and the secondary coil are positioned on the upper ground, and then the signal input through the primary coil is responded to the ground and detected by the secondary coil. In this case, the input signal (frequency of the input signal) input to the primary coil is variable to detect the peak PEAK of the secondary coil output signal corresponding to it, and detecting the frequency when the peak is generated. It is a method of determining the resonant frequency and Q value by performing.

That is, as shown in Figure 6, by inputting a specific signal to the primary coil and sampling the response frequency of the ground responding to the measurement and measuring the magnitude, and again inputs the frequency around it to measure the magnitude Was repeated to find the resonant peak point corresponding to the input frequency and was determined as the resonant frequency, and the Q value was calculated using the magnitude of the resonant peak at this time. This is based on the fact that the magnitude of the resonance peak is equal to the Q value when the distance between the vehicle box and the ground vehicle is constant.

The conventional Q measuring apparatus described above is a fixed type which detects the Q value of the ground person that is installed and carried in a detection window (DEPOT FOR INSPECTION & REPAIR). It is divided into portable for measuring.

In practice, since it is impossible to measure the Q value by gradually moving all the grounders installed on the track to the base station, the worker carries the portable Q measuring device to measure the Q by moving the line section where the ATS grounder is installed.

However, in the conventional Q measuring apparatus as described above, since the frequency of the input signal applied to the primary coil after varying the position of the ground is measured and the Q is measured by the resonance peak corresponding thereto, first, the measuring apparatus and the ground There is a problem that the Q value changes according to the height and direction of the ruler (i.e., the measurement height and the direction) (i.e., the Q value changes depending on the operator), which lowers the reliability of the measurement result. Therefore, there is a problem that a skilled technician is required due to the change of the measured value. Third, there is a problem that it takes a lot of measurement time by measuring Q by continuously changing the input signal. Due to this problem, there is a problem in that the Q value cannot be measured while moving. Fifth, since the Q measurement result depends on the sampling interval, When sampling frequency, it takes a lot of time and costs (device configuration cost) rises. (Low frequency sampling shortens the time and can be configured at low cost. Sixth, because most of the components of the device for measuring the Q value is an analog (ANALOG) device consisting of a resistor, a capacitor, etc., there is a problem that it is affected by temperature a lot.

In addition, the conventional Q measuring device, there is a problem that it takes more time to move than the measurement time, because the worker has to move and measure the ground to the ground installed on the train track, eighth, all installed on the train track of the long section In order to measure a grounded person in a short time, there is a problem that a number of workers must measure by using a plurality of equipment, and ninth, there is a risk of collision with a train because a worker must perform a measurement work while the worker is on a track. There is a problem, and tenth, because the measurement work is performed between each passing of the train, there is a problem that additional measurement waiting time to wait until the time that the train does not pass after the travel time and measurement time, the eleventh, Q measurement As the environment of the city is the measurement in the state that a train does not pass, an actual train And the values at the time of passing had such a problem that occurs is different.

An object of the present invention is to solve the above-mentioned conventional problems, in particular, by using the Q-measuring device mounted on the train and using the frequency-phase characteristics between the input signal and the output signal input to the groundman while performing normal high-speed driving By detecting the resonant frequency and the cutoff frequency, it is possible to detect the resonant frequency and the cutoff frequency quickly and accurately, calculate the Q value from the detected value and display it on the display device as well as database the Q value of the ground. The present invention provides a method and method for measuring the selection coefficient of a train automatic stopper that can easily and quickly perform a systematic management.

That is, if an input signal of the same frequency as the ground frequency is input to the ground person, a phase difference of -90 ° occurs between the input signal and the output signal, and if a signal of the same frequency as the first blocking frequency is input, the input signal is input. A phase difference of -45 ° occurs between the output signal and the output signal, and a phase difference of -135 ° occurs between the input signal and the output signal when a signal having the same frequency as the second blocking frequency is input. Q is measured by accurately detecting the 1st and 2nd frequency, and the measuring device is a digital phase locked loop using a numerically controlled sine wave generator (hereinafter referred to as NOC). It is possible to make a quick measurement by installing it on the train to perform normal operation (high speed driving) and to make Q measurement. It is. In this case, the measured Q value is displayed together with the resonance frequency on the display device, and the value is stored and made into a database to be used for future maintenance.

1 is a block diagram showing the configuration of a train automatic stop device,

2 is a circuit diagram showing the configuration of a train automatic stopper grounder,

3 is a view showing an example of a driving curve of the automatic train stopping apparatus;

4 is a diagram illustrating a relationship between a resonance frequency and a cutoff frequency;

5A is a diagram showing a frequency distribution when a Q value is normal;

5B is a diagram showing a frequency interference state when the Q value is lower than the prescribed value;

6 is a diagram showing a sampling relationship during Q measurement;

7 is a block diagram showing an example of the configuration of the present invention " apparatus for selecting the coefficient of selection of the ground vehicle automatic stop device "

8 is a control flow diagram showing an example of the present invention "a method for controlling a selection coefficient measuring apparatus of a ground automatic stopper device";

9 is a block diagram showing a configuration of a DSP;

FIG. 10 is a block diagram illustrating components used to detect a rough resonance frequency of a ground person at the time of Q measurement; FIG.

11 is a view showing the components used when calculating the Q value of the ground maneuver precisely,

12 shows frequency-satellite characteristics in terrestrial resonance.

<Explanation of symbols for the main parts of the drawings>

100: selection coefficient detection means 110: a diagram showing a configuration of a DSP;

120: input signal detection means 130: NCO

140: D / A converter 150: output signal detection means

200: notebook computer 210: display means

220: storage means 300: signal input means

310: first amplifier 320: primary coil

400: signal detection means 410: second amplifier

420: secondary coil 500: size detection means

510: A / D converter 520: envelope detector

S10: coarse frequency detection step S20: first blocking frequency detection step

S30: Resonance frequency detection step S40: Second cut-off frequency detection step

S50: bandwidth calculation step S60: selection coefficient calculation step

S70: display step S80: storage step

In order to achieve the above object, the configuration 1 of the present invention "a train automatic stop device ground coefficient selection coefficient measuring device" consists of a first amplifier and a primary coil, amplifying the input signal of a predetermined frequency applied to mutual magnetic A signal input means applied to the ground person by an inductive coupling method; A signal detecting means comprising a second amplifier and a secondary coil to detect an output signal output from the ground wave by a frequency drawing phenomenon; It includes a phase synchronization loop (PLL) circuit, and after fixing the phase difference between the input signal input to the signal input means and the output signal output from the signal detection means to -45 °, -90 ° or -135 ° Detects the frequency of the input signal for each phase difference, the input signal frequency when the phase difference is -45 °, the first cut-off frequency, the input signal frequency when the -90 ° is the resonance frequency, the input signal frequency when the -135 ° Selecting coefficient detection means for calculating a selection coefficient Q from a bandwidth and a resonance frequency between the first blocking frequency and the second blocking frequency, wherein? It is characterized in that it comprises a display means for indicating the selection coefficient detected by the selection coefficient detecting means.

In addition, the selection coefficient detecting means includes: a phase difference detecting unit detecting a phase difference between an input signal input to the signal input means and an output signal output from the signal detecting means; Connected to the signal output terminal of the phase difference detecting unit, first, a predetermined input signal for roughly detecting the resonant frequency of the ground signal is initially outputted at the beginning of the selection coefficient detection operation; and second, the predetermined frequency of the ground signal is output by outputting the predetermined input signal. After roughly detecting, the input signal (that is, the frequency of the input signal) is increased so that the phase difference between the input signal and the output signal output from the phase difference detection unit is -45 °, -90 °, or -135 °. Or outputting by reducing or outputting the frequency of the input signal when the phase difference between the input signal and the output signal is -45 ° and the frequency of the input signal when the first cut-off frequency and -90 ° are the resonance frequency, The frequency of the input signal at −135 ° is regarded as the second cutoff frequency, and the selection coefficient Q is calculated from the bandwidth and the resonance frequency between the first cutoff frequency and the second cutoff frequency. Outputting a signal for selecting coefficient exported by the display means, and the fourth low-pass filter (LOW PASS FILTER), or proportional-integral control: control for performing (PROPORTIONAL & INTEGRAL PI control) function and; A D / A converter connected to the signal output terminal of the control unit and operated at an initial stage of the detection coefficient detection operation to convert a predetermined input signal for roughly detecting the resonant frequency of the terrestrial signal into an analog signal and output the analog signal to a signal input means; It is connected to the signal output terminal of the control unit and operates when detecting an accurate resonant frequency and a first cutoff frequency and a second cutoff frequency after detecting a rough resonant frequency of the ground, to precisely control the frequency of the input signal input to the ground. A numerically controlled sinusoidal wave generator (NCO); An input signal detector for detecting a frequency of an input signal output from the numerically controlled sinusoidal wave generator and inputting the detected phase signal to the phase difference detector; And an output signal detection unit for inputting the output signal output from the signal detection unit to the phase difference detection unit.

The phase difference detector may include a counter (COUNTER) or a timer (TIMER) for detecting a phase difference by measuring a period between an input signal and an output signal input from the input signal detector and the output signal detector.

The predetermined input signal outputted by the control unit in order to detect the resonant frequency of the terrestrial antenna at the beginning of the selection coefficient detection operation is composed of all of the resonant frequencies of the terrestrial crystal and outputs them sequentially.

The predetermined input signal outputted by the controller in order to detect the resonant frequency of the terrestrial antenna at the beginning of the selection coefficient detection operation is characterized by being composed of an intermediate frequency among frequency bands indicated by each resonant frequency of the terrestrial antenna.

The predetermined input signal output by the control unit in order to detect the resonant frequency of the ground at the beginning of the selection coefficient detection operation is characterized by being composed of a synthesized frequency obtained by combining all the resonant frequencies of the ground.

The input signal detector or the output signal detector may be configured as a zero crossing detector that detects a zero crossing point of the input signal or the output signal.

The phase difference detection unit, the control unit, the D / A converter, the numerically controlled sinusoidal wave generator (NCO), the input signal detection unit, and the output signal detection unit include the phase difference detection unit and the control unit as a digital signal processing processor (DSP). The phase difference detection unit is configured using a counter or a timer of the digital signal processing processor, and the input signal detection unit and the output signal detection unit are configured of a digital phase synchronization loop (DPLL) circuit composed of a zero crossing detector.

In addition, the second amplification part of the signal detecting means is characterized in that it is composed of a pickup coil (PICK-UP COIL).

In addition, the display means, characterized in that consisting of a liquid crystal display device or a monitor.

On the other hand, the configuration 1 of the present invention "control method of the device for measuring the selection coefficient of the ground automatic stop device" consists of a first amplifier and a primary coil, amplifying the input signal of a predetermined frequency applied mutual mutual induction coupling method A signal input means applied to the ground person by means of; A signal detecting means comprising a second amplifier and a secondary coil to detect an output signal output from the ground wave by a frequency drawing phenomenon; It includes a phase synchronization loop (PLL) circuit, and after fixing the phase difference between the input signal input to the signal input means and the output signal output from the signal detection means to -45 °, -90 ° or -135 ° Detecting the frequency of the input signal with respect to the respective phase differences, and inputting the frequency of the input signal when the phase difference is -45 ° and the frequency of the input signal when the first blocking frequency and -90 ° is the resonance frequency and -135 °. Selection coefficient detection means for setting a frequency of the signal as a second blocking frequency and calculating a selection coefficient Q from a bandwidth and a resonance frequency between the first blocking frequency and the second blocking frequency; In the selection coefficient measuring method of the "train automatic stop device ground coefficient selection coefficient measuring device" characterized in that it comprises a display means for indicating the selection coefficient detected by the selection coefficient detection means,

In the selection coefficient measuring method, the predetermined coefficient detection means applies a predetermined input signal to the ground person through the signal input means in order to detect the resonance frequency of the ground person at the initial operation of the selection coefficient measurement. A coarse frequency detection step of detecting a resonant frequency of the terrestrial ground responding to a predetermined input signal through signal detection means to detect the resonant frequency of the terrestrial ground; The coarse resonant frequency detected by performing the coarse frequency detection step is precisely measured so that the phase difference between the input signal applied to the ground party through the signal input means and the output signal of the ground signal detected by the signal detection means is -45 °. Adjusting the first cutoff frequency so that the frequency of the input signal when the phase difference is -45 ⁰ is the first cutoff frequency; Precise resonant frequency detected by performing the rough frequency detection step so that the phase difference between the input signal applied to the ground party through the signal input means and the output signal of the ground signal detected through the signal detection means is -90 °. A resonance frequency detecting step of adjusting the frequency of the input signal when the phase difference is -90 ⁰ as a resonance frequency; The coarse resonant frequency detected by performing the coarse frequency detection step is precisely measured so that the phase difference between the input signal applied to the ground party through the signal input means and the output signal of the ground signal detected by the signal detection means is -135 °. A second cutoff frequency detecting step of adjusting the frequency of the input signal when the phase difference is -135 ⁰ as a second cutoff frequency; Calculating a bandwidth between the first cut-off frequency detected in the first cut-off frequency detection step and the second cut-off frequency detected in the second cut-off frequency detection step; A selection coefficient calculation step of calculating a selection factor Q by dividing the resonance frequency detected in the resonance frequency detection step by the bandwidth calculated in the bandwidth calculation step; And a display step of displaying the selection coefficient calculated in the selection coefficient calculation step on the display means.

In addition, a predetermined input signal applied to roughly detect the resonant frequency of the ground in the schematic frequency detection step is configured of all of the resonant frequencies each of the ground has and is characterized in that to output sequentially.

In addition, the predetermined input signal applied to roughly detect the resonant frequency of the ground in the schematic frequency detection step is characterized in that the intermediate frequency of the frequency band represented by each resonant frequency possessed by the ground.

In addition, the predetermined input signal applied to roughly detect the resonant frequency of the terrestrial antenna in the schematic frequency detection step is characterized in that it is composed of a synthesized frequency obtained by combining all the resonant frequencies of the terrestrial as one.

Configuration 1 of the present invention, the automatic train stopper device selection coefficient measuring device and control method thereof, is characterized in that the resonant frequency (5 signal types) the grounder has in the control unit at the beginning of the Q (selection coefficient) measurement operation. In the case of terrestrial grounds having a frequency of 98 kHz, 106 kHz, 114 kHz, 122 kHz, and 130 kHz), respectively, or outputting the intermediate frequency (for example, 114 kHz out of 98 kHz to 130 kHz) among the frequency bands indicated by each resonant frequency of the ground. Or a frequency that synthesizes each resonant frequency of the terrestrial as a signal (for example, a frequency synthesized with 98 kHz, 106 kHz, 114 kHz, 122 kHz, and 130 kHz), and detects the coarse resonant frequency of the ground from the corresponding frequency. Then, the frequency difference near the detected rough resonance frequency is increased or decreased to fix the phase difference between the input signal and the output signal at -45 °, -90 °, or -135 °. The frequency of the input signal with respect to the fixed phase difference is set as a first cut-off frequency, a resonant frequency, and a second cut-off frequency, respectively, and the detected first cut-off frequency, resonant frequency, and second cut-off frequency are represented by [Equation 1]. In order to calculate the selection coefficient by substituting in, it is possible to calculate the selection coefficient using the frequency-phase characteristic at the time of terrestrial resonance, so that accurate values can be measured regardless of the measurement height and direction. In addition, by configuring the selection coefficient detecting means as a DPLL, it is possible to perform a fast detection operation, it is possible to perform the normal operation in the state mounted on the train to measure the Q. At this time, the measured Q is displayed through the display means.

On the other hand, the configuration 2 of the "train automatic stop device ground coefficient selection coefficient measuring device" of the present invention is composed of a first amplifier and a primary coil, amplifying an input signal of a predetermined frequency applied by mutual magnetic induction coupling method. Signal input means for applying to the box; A signal detecting means comprising a second amplifier and a secondary coil to detect an output signal output from the ground wave by a frequency drawing phenomenon; A phase synchronization loop (PLL) circuit, the phase difference between the input signal input to the signal input means and the output signal output from the signal detection means is fixed to -45 °, -90 °, or -135 °, The frequency of the input signal for each phase difference is detected, and the frequency of the input signal when the phase difference is -45 ° is the first cutoff frequency and the frequency of the input signal when -90 ° is the resonance frequency, and the input signal when -135 °. Selection coefficient detecting means for calculating a selection coefficient Q from a bandwidth and a resonance frequency between the first blocking frequency and the second blocking frequency, the frequency of? Display means for indicating a selection coefficient detected through said selection coefficient detection means; The technical configuration is characterized in that it comprises a storage means for storing the database of the selection coefficient detected by the selection coefficient detection means for storing.

In addition, the selection coefficient detecting means includes: a phase difference detecting unit detecting a phase difference between an input signal input to the signal input means and an output signal output from the signal detecting means; Connected to the signal output terminal of the phase difference detecting unit, first, a predetermined input signal for roughly detecting the resonant frequency of the ground signal is initially outputted at the beginning of the selection coefficient detection operation; and second, the predetermined frequency of the ground signal is output by outputting the predetermined input signal. After roughly detecting, the frequency of the input signal is increased or decreased so that the phase difference between the input signal and the output signal output from the phase difference detection unit becomes -45 °, -90 °, or -135 °. Operation, the frequency of the input signal when the phase difference between the input signal and the output signal is -45 ° is the first cutoff frequency and the frequency of the input signal when the -90 ° is the resonance frequency, -135 °. The frequency of the input signal is set as the second cutoff frequency, and the selection factor Q is calculated from the bandwidth and the resonance frequency between the first cutoff frequency and the second cutoff frequency. It outputs a signal to the display means and storage means, and the fourth low-pass filter (LOW PASS FILTER), or control unit for performing a proportional integration control and; A D / A converter connected to the signal output terminal of the control unit and operated at an initial stage of the detection coefficient detection operation to convert a predetermined input signal for roughly detecting the resonant frequency of the terrestrial signal into an analog signal and output the analog signal to a signal input means; It is connected to the signal output terminal of the control unit and operates when detecting an accurate resonant frequency and a first cutoff frequency and a second cutoff frequency after detecting a rough resonant frequency of the ground, to precisely control the frequency of the input signal input to the ground. A numerically controlled sinusoidal wave generator (NCO); An input signal detector for detecting a frequency of an input signal output from the numerically controlled sinusoidal wave generator and inputting the detected phase signal to the phase difference detector; And an output signal detection unit for inputting the output signal output from the signal detection unit to the phase difference detection unit.

The display means and the storage means are characterized in that the configuration of the computer.

On the other hand, the configuration 2 of the present invention "control method of the automatic vehicle stop device selection coefficient measuring device" consists of a first amplifier and the primary coil, amplifying the input signal of a predetermined frequency applied mutual mutual induction coupling method A signal input means applied to the ground person by means of; A signal detecting means comprising a second amplifier and a secondary coil to detect an output signal output from the ground wave by a frequency drawing phenomenon; It includes a phase synchronization loop (PLL) circuit, and after fixing the phase difference between the input signal input to the signal input means and the output signal output from the signal detection means to -45 °, -90 ° or -135 ° Detecting the frequency of the input signal with respect to the respective phase differences, and inputting the frequency of the input signal when the phase difference is -45 ° and the frequency of the input signal when the first blocking frequency and -90 ° is the resonance frequency and -135 °. Selection coefficient detection means for setting a frequency of the signal as a second blocking frequency and calculating a selection coefficient Q from a bandwidth and a resonance frequency between the first blocking frequency and the second blocking frequency; Display means for indicating a selection coefficient detected through said selection coefficient detection means; In the selection coefficient measuring method of the "train automatic stop device ground coefficient selection coefficient measuring device" characterized in that it comprises a storage means for storing the database of the selection coefficient detected by the selection coefficient detection means;

In the selection coefficient measuring method, the predetermined coefficient detection means applies a predetermined input signal to the ground person through the signal input means in order to detect the resonance frequency of the ground person at the initial operation of the selection coefficient measurement. A coarse frequency detection step of detecting a resonant frequency of the terrestrial ground responding to a predetermined input signal through signal detection means to detect the resonant frequency of the terrestrial ground; The coarse resonant frequency detected by performing the coarse frequency detection step is precisely measured so that the phase difference between the input signal applied to the ground party through the signal input means and the output signal of the ground signal detected by the signal detection means is -45 °. Adjusting the first cutoff frequency so that the frequency of the input signal when the phase difference is -45 ⁰ is the first cutoff frequency; Precise resonant frequency detected by performing the rough frequency detection step so that the phase difference between the input signal applied to the ground party through the signal input means and the output signal of the ground signal detected through the signal detection means is -90 °. A resonance frequency detecting step of adjusting the frequency of the input signal when the phase difference is -90 ⁰ as a resonance frequency; The coarse resonant frequency detected by performing the coarse frequency detection step is precisely measured so that the phase difference between the input signal applied to the ground party through the signal input means and the output signal of the ground signal detected by the signal detection means is -135 °. A second cutoff frequency detecting step of adjusting the frequency of the input signal when the phase difference is -135 ⁰ as a second cutoff frequency; Calculating a bandwidth between the first cut-off frequency detected in the first cut-off frequency detection step and the second cut-off frequency detected in the second cut-off frequency detection step; A selection coefficient calculation step of calculating a selection factor Q by dividing the resonance frequency detected in the resonance frequency detection step by the bandwidth calculated in the bandwidth calculation step; A display step of displaying on the display means the selection coefficient calculated in the selection coefficient calculation step; And a storage step of storing the selection coefficient calculated in the selection coefficient calculation step in a database.

Configuration 2 of the present invention "train automatic stop device ground coefficient selection coefficient measurement device and control method thereof" is a database function is added to the function according to the configuration 1 of the present invention. That is, the Q value detected through the selection coefficient detection means is databased to facilitate maintenance, management, and repair of the grounded person. In practice, the display device and the storage means are constituted by a portable notebook, mounted on a train, and operated by a predetermined database program.

On the other hand, the configuration 3 of the present invention "train automatic stop device ground coefficient selection coefficient measuring device" is composed of the first amplifier and the primary coil, amplifying the input signal of a predetermined frequency applied by mutual mutual induction coupling method Signal input means for applying to the box; A signal detecting means comprising a second amplifier and a secondary coil to detect an output signal output from the ground wave by a frequency drawing phenomenon; A size detecting means including an A / D converter (analog / digital converter) for detecting the magnitude of the output signal detected by the signal detecting means, converting the signal into a digital signal, and outputting the digital signal; A phase synchronization loop (PLL) circuit is included, and the phase difference between the input signal and the output signal of the signal input means and the signal detection means is fixed to -45 °, -90 °, or -135 °, and then the respective phase differences Detects the frequency of the input signal with respect to the input signal when the phase difference is -45 °, the first cut-off frequency, the frequency of the input signal when the -90 ° resonant frequency, the frequency of the input signal when the -135 ° A second cutoff frequency is set, a selection factor Q is calculated from a bandwidth and a resonance frequency between the first cutoff frequency and the second cutoff frequency, and the magnitude of the output signal applied by the magnitude detecting means is compared with the input signal. Selection coefficient detection means for detecting whether the magnitude satisfies the first cut-off frequency, the resonant frequency, and the second cut-off frequency when the phase difference between the output signals is -45 °, -90 °, and -135 °, respectively; It is characterized in that it comprises a display means for indicating the selection coefficient detected by the selection coefficient detecting means.

In addition, the selection coefficient detecting means includes: a phase difference detecting unit detecting a phase difference between an input signal input to the signal input means and an output signal output from the signal detecting means; Connected to the signal output terminal of the phase difference detecting unit, first, a predetermined input signal for roughly detecting the resonant frequency of the ground signal is initially outputted at the beginning of the selection coefficient detection operation; and second, the predetermined frequency of the ground signal is output by outputting the predetermined input signal. After roughly detecting, the frequency of the input signal is increased or decreased so that the phase difference between the input signal and the output signal output from the phase difference detection unit becomes -45 °, -90 °, or -135 °. Operation, the frequency of the input signal when the phase difference between the input signal and the output signal is -45 ° is the first cutoff frequency and the frequency of the input signal when the -90 ° is the resonance frequency, -135 °. The frequency of the input signal is set as the second cutoff frequency, and the selection factor Q is calculated from the bandwidth and the resonance frequency between the first cutoff frequency and the second cutoff frequency. Outputting the signal to the display means; and fourthly, performing a low pass filter or proportional integral control function; and fifthly, comparing the magnitudes of the output signals applied from the magnitude detecting means to compare the phase difference between the input signal and the output signal. A control unit for detecting whether the magnitude satisfies the first cut-off frequency, the resonant frequency, and the second cut-off frequency when -45 °, -90 °, or -135 °; A D / A converter connected to the signal output terminal of the control unit and operated at an initial stage of the detection coefficient detection operation to convert a predetermined input signal for roughly detecting the resonant frequency of the terrestrial signal into an analog signal and output the analog signal to a signal input means; It is connected to the signal output terminal of the control unit and operates when detecting an accurate resonant frequency and a first cutoff frequency and a second cutoff frequency after detecting a rough resonant frequency of the ground, to precisely control the frequency of the input signal input to the ground. A numerically controlled sinusoidal wave generator (NCO); An input signal detector for detecting a frequency of an input signal output from the numerically controlled sinusoidal wave generator and inputting the detected phase signal to the phase difference detector; And an output signal detection unit for inputting the output signal output from the signal detection unit to the phase difference detection unit.

In addition, the magnitude detecting means comprises an A / D converter which converts the output signal detected by the signal detecting means into a digital signal and inputs it to the controller, or detects only the magnitude of the output signal detected by the signal detecting means. An envelope detector (ENVELOP DETECTOR), and the A / D converter for converting the signal output from the envelope detector into a digital signal and input to the control unit.

On the other hand, the configuration 3 of the present invention "control method of the measurement coefficient measuring device of a train automatic stopper ground" consists of a first amplifier and a primary coil, amplifying the input signal of a predetermined frequency applied mutual mutual induction coupling method A signal input means applied to the ground person by means of; A signal detecting means comprising a second amplifier and a secondary coil to detect an output signal output from the ground wave by a frequency drawing phenomenon; A size detecting means including an A / D converter (analog / digital converter) for detecting the magnitude of the output signal detected by the signal detecting means, converting the signal into a digital signal, and outputting the digital signal; A phase synchronization loop (PLL) circuit is included, and the phase difference between the input signal and the output signal of the signal input means and the signal detection means is fixed to -45 °, -90 °, or -135 °, and then the respective phase differences Detects the frequency of the input signal with respect to the input signal when the phase difference is -45 °, the first cut-off frequency, the frequency of the input signal when the -90 ° resonant frequency, the frequency of the input signal when the -135 ° A second cutoff frequency is set, a selection factor Q is calculated from a bandwidth and a resonance frequency between the first cutoff frequency and the second cutoff frequency, and the magnitude of the output signal applied by the magnitude detecting means is compared with the input signal. Selection coefficient detection means for detecting whether the magnitude satisfies the first cut-off frequency, the resonant frequency, and the second cut-off frequency when the phase difference between the output signals is -45 °, -90 °, and -135 °, respectively; In the selection coefficient measuring method of the "train automatic stop device ground coefficient selection coefficient measuring device" characterized in that it comprises a display means for indicating the selection coefficient detected by the selection coefficient detection means,

In the selection coefficient measuring method, the predetermined coefficient detection means applies a predetermined input signal to the ground person through the signal input means in order to detect the resonance frequency of the ground person at the initial operation of the selection coefficient measurement. A coarse frequency detection step of detecting a resonant frequency of the terrestrial ground responding to a predetermined input signal through signal detection means to detect the resonant frequency of the terrestrial ground; The coarse resonant frequency detected by performing the coarse frequency detection step is precisely measured so that the phase difference between the input signal applied to the ground party through the signal input means and the output signal of the ground signal detected by the signal detection means is -45 °. Adjusting the first cutoff frequency so that the frequency of the input signal when the phase difference is -45 ⁰ is the first cutoff frequency; Precise resonant frequency detected by performing the rough frequency detection step so that the phase difference between the input signal applied to the ground party through the signal input means and the output signal of the ground signal detected through the signal detection means is -90 °. A resonance frequency detecting step of adjusting the frequency of the input signal when the phase difference is -90 ⁰ as a resonance frequency; The coarse resonant frequency detected by performing the coarse frequency detection step is precisely measured so that the phase difference between the input signal applied to the ground party through the signal input means and the output signal of the ground signal detected by the signal detection means is -135 °. A second cutoff frequency detecting step of adjusting the frequency of the input signal when the phase difference is -135 ⁰ as a second cutoff frequency; Calculating a bandwidth between the first cut-off frequency detected in the first cut-off frequency detection step and the second cut-off frequency detected in the second cut-off frequency detection step; The resonant frequency detected in the resonant frequency detection step is divided by the bandwidth calculated in the bandwidth calculation step to calculate a selection coefficient Q, and the phase difference between the input signal and the output signal is -45 ⁰ , respectively. After calculating the selection coefficient (Q) by comparing the magnitude of the detected signal at -90 ⁰ and -135 ⁰ , the selection coefficient calculated with the resonance frequency and the cutoff frequency, and the magnitude of the resonance frequency and the cutoff frequency A selection coefficient calculation step of checking whether the selection coefficients detected and calculated are the same; And a display step of displaying the selection coefficient calculated in the selection coefficient calculation step on the display means.

Further, when calculating the selection coefficient by the magnitude of the output signal in the selection coefficient calculation step, the magnitude of the output signal detected by the magnitude detection means when the phase difference between the input signal and the output signal is -45 ⁰ , and -90 ⁰ Is compared with the magnitude of the output signal detected at -135 ⁰ and the magnitude of the magnitude of the output signal detected at -45 ⁰ , -90 ⁰ , and -135 ^{0 is} sequentially It is characterized by determining whether the first cutoff frequency, the resonant frequency, and the second cutoff frequency are satisfied and output a signal thereof.

In addition, when the selection coefficient is displayed in the display step, the selection coefficient calculated on the basis of the phase difference, the selection coefficient calculated on the basis of the magnitude of the output signal, and whether or not there is a coincidence.

Configuration 3 of the present invention "train automatic stop device ground coefficient selection coefficient measurement device and control method thereof" is characterized by the resonant frequency and the phase by using the frequency-phase characteristics at the resonance as described in the configuration 1 of the present invention. In addition to detecting the first cutoff frequency and the second cutoff frequency, by detecting the magnitude of the output signal, a function of confirming whether or not the Q value detected by the selection coefficient detecting means is correct is added.

On the other hand, the configuration 4 of the present invention "train automatic stop device terrestrial selection coefficient measuring device" consists of a first amplifier and a primary coil, amplifying the input signal of a predetermined frequency applied by mutual magnetic induction coupling method Signal input means for applying to the box; A signal detecting means comprising a second amplifier and a secondary coil to detect an output signal output from the ground wave by a frequency drawing phenomenon; And an A / D converter (analog / digital converter), the magnitude detecting means for detecting the magnitude of the output signal detected by the signal detecting means and converting the magnitude into an digital signal; A phase synchronization loop (PLL) circuit is included, and the phase difference between the input signal and the output signal of the signal input means and the signal detection means is fixed to -45 °, -90 °, or -135 °, and then the respective phase differences Detects the frequency of the input signal with respect to the input signal when the phase difference is -45 °, the first cut-off frequency, the frequency of the input signal when the -90 ° resonant frequency, the frequency of the input signal when the -135 ° A second cutoff frequency is set, a selection factor Q is calculated from a bandwidth and a resonance frequency between the first cutoff frequency and the second cutoff frequency, and the magnitude of the output signal applied by the magnitude detecting means is compared with the input signal. Selection coefficient detection means for detecting whether the magnitude satisfies the first cut-off frequency, the resonant frequency, and the second cut-off frequency when the phase difference between the output signals is -45 °, -90 °, and -135 °, respectively; Display means for indicating a selection coefficient detected through said selection coefficient detection means; The technical configuration is characterized in that it comprises a storage means for storing the database of the selection coefficient detected by the selection coefficient detection means for storing.

In addition, the selection coefficient detecting means includes: a phase difference detecting unit detecting a phase difference between an input signal input to the signal input means and an output signal output from the signal detecting means; Connected to the signal output terminal of the phase difference detecting unit, first, a predetermined input signal for roughly detecting the resonant frequency of the ground wave is output at the beginning of the selection coefficient detection operation; After roughly detecting, the frequency of the input signal is increased or decreased so that the phase difference between the input signal and the output signal output from the phase difference detection unit is -45 °, -90 °, or -135 °. Operation, the frequency of the input signal when the phase difference between the input signal and the output signal is -45 ° is the first cutoff frequency and the frequency of the input signal when the -90 ° is the resonance frequency, -135 °. The frequency of the input signal is a second cutoff frequency, a selection factor Q is calculated from a bandwidth and a resonance frequency between the first cutoff frequency and the second cutoff frequency, and third, the calculated selector Outputs a signal with respect to the display means and the storage means, fourth, performs a low pass filter, or proportional integral control function, and fifth, compares the magnitude of the output signal applied from the magnitude detection means, and A control unit for detecting whether or not the magnitude satisfies the first cut-off frequency, the resonant frequency, and the second cut-off frequency when the phase difference is -45 °, -90 °, and -135 °, respectively; A D / A converter connected to the signal output terminal of the control unit and operated at an initial stage of the detection coefficient detection operation to convert a predetermined input signal for roughly detecting the resonant frequency of the terrestrial signal into an analog signal and output the analog signal to a signal input means; It is connected to the signal output terminal of the control unit and operates when detecting an accurate resonant frequency and a first cutoff frequency and a second cutoff frequency after detecting a rough resonant frequency of the ground, to precisely control the frequency of the input signal input to the ground. A numerically controlled sinusoidal wave generator (NCO); An input signal detector for detecting a frequency of an input signal output from the numerically controlled sinusoidal wave generator and inputting the detected phase signal to the phase difference detector; And an output signal detection unit for inputting the output signal output from the signal detection unit to the phase difference detection unit.

On the other hand, the configuration 4 of the present invention "control method of the measurement coefficient measuring device of the ground automatic stop device" consists of a first amplifier and a primary coil, amplifying the input signal of a predetermined frequency applied mutual mutual induction coupling method A signal input means applied to the ground person by means of; A signal detecting means comprising a second amplifier and a secondary coil to detect an output signal output from the ground wave by a frequency drawing phenomenon; A size detecting means including an A / D converter (analog / digital converter) for detecting the magnitude of the output signal detected by the signal detecting means, converting the signal into a digital signal, and outputting the digital signal; A phase synchronization loop (PLL) circuit is included, and the phase difference between the input signal and the output signal of the signal input means and the signal detection means is fixed to -45 °, -90 °, or -135 °, and then the respective phase differences Detects the frequency of the input signal with respect to the input signal when the phase difference is -45 °, the first cut-off frequency, the frequency of the input signal when the -90 ° resonant frequency, the frequency of the input signal when the -135 ° A second cutoff frequency is set, a selection factor Q is calculated from a bandwidth and a resonance frequency between the first cutoff frequency and the second cutoff frequency, and the magnitude of the output signal applied by the magnitude detecting means is compared with the input signal. Selection coefficient detection means for detecting whether the magnitude satisfies the first cut-off frequency, the resonant frequency, and the second cut-off frequency when the phase difference between the output signals is -45 °, -90 °, and -135 °, respectively; Display means for indicating a selection coefficient detected through said selection coefficient detection means; In the selection coefficient measuring method of the "train automatic stop device ground coefficient selection coefficient measuring device" characterized in that it comprises a storage means for storing a database of the selection coefficient detected by the selection coefficient detection means,

In the selection coefficient measuring method, the predetermined coefficient detection means applies a predetermined input signal to the ground person through the signal input means in order to detect the resonance frequency of the ground person at the initial operation of the selection coefficient measurement. A coarse frequency detection step of detecting a resonant frequency of the terrestrial ground responding to a predetermined input signal through signal detection means to detect the resonant frequency of the terrestrial ground; The coarse resonant frequency detected by performing the coarse frequency detection step is precisely measured so that the phase difference between the input signal applied to the ground party through the signal input means and the output signal of the ground signal detected by the signal detection means is -45 °. Adjusting the first cutoff frequency so that the frequency of the input signal when the phase difference is -45 ⁰ is the first cutoff frequency; Precise resonant frequency detected by performing the rough frequency detection step so that the phase difference between the input signal applied to the ground party through the signal input means and the output signal of the ground signal detected through the signal detection means is -90 °. A resonance frequency detecting step of adjusting the frequency of the input signal when the phase difference is -90 ⁰ as a resonance frequency; The coarse resonant frequency detected by performing the coarse frequency detection step is precisely measured so that the phase difference between the input signal applied to the ground party through the signal input means and the output signal of the ground signal detected by the signal detection means is -135 °. A second cutoff frequency detecting step of adjusting the frequency of the input signal when the phase difference is -135 ⁰ as a second cutoff frequency; Calculating a bandwidth between the first cut-off frequency detected in the first cut-off frequency detection step and the second cut-off frequency detected in the second cut-off frequency detection step; The resonant frequency detected in the resonant frequency detection step is divided by the bandwidth calculated in the bandwidth calculation step to calculate a selection coefficient Q, and the phase difference between the input signal and the output signal is -45 ⁰ , respectively. After calculating the selection coefficient (Q) by comparing the magnitude of the detected signal at -90 ⁰ and -135 ⁰ , the selection coefficient calculated with the resonance frequency and the cutoff frequency, and the magnitude of the resonance frequency and the cutoff frequency A selection coefficient calculation step of checking whether the selection coefficients detected and calculated are the same; A display step of displaying on the display means the selection coefficient calculated in the selection coefficient calculation step; And a storage step of storing the selection coefficient calculated in the selection coefficient calculation step in a database.

Configuration 4 of the present invention "train automatic stop device ground coefficient selection coefficient measuring device and control method thereof" is a database function is added to the function according to the configuration 3 of the present invention. That is, the Q value detected through the selection coefficient detection means is databased to facilitate maintenance, management, and repair of the ground person.

Hereinafter, with reference to the accompanying drawings for an embodiment according to the spirit of the present invention configured as described above, "a device for measuring the selection coefficient of the ground automatic stop device and its control method" as follows.

<Example>

In the present embodiment, the technical idea of the present invention will be described with reference to the configuration 4 of the configuration 1 to configuration 4 of the present invention " apparatus for automatic selection of the train stopper and the control method thereof ".

This is because the description of the other configurations 1 to 3 can be made by explaining the technical idea of the configuration 4.

In the present embodiment, on the other hand, the phase difference detection unit and the control unit are configured as DSP, the input signal detection means and the output signal detection means are configured as zero crossing detectors, and instead of a voltage controlled oscillator (hereinafter referred to as VCO), NCO. The DPLL is configured with the D / A converter using the following description.

Here, the DSP is an oscillator (OSCILLA-TOR) 114, a ROM (READ ONLY MEMORY) 111, a RAM (RANDOM ACCESS MEMORY) 112, a central processing unit (CPU) as shown in FIG. ) 113, a counter (COUNTER) 117 and a communication port 115, input and output terminals 116, 118, 119, etc., the function of the phase difference detection unit 110a by using the counter (117). The low pass filter function of the controller 110b is performed by performing a low pass filter algorithm.

In the present embodiment, the display means 210 and the storage means 220 are constituted by the notebook computer 200. That is, a monitor of the notebook computer 200 is used as a display unit 210 and a hard disk (HARD DISK) as the storage unit 220, and a database is constructed through the central processing unit of the notebook computer 200 and its peripheral devices. And store the selection factor of the ground and other information (eg resonant frequency, cutoff frequency, etc.) here.

In addition, in the present embodiment, the second amplifier 410 of the signal detecting means 400 is constituted by the pickup coil 410a, and the size detecting means 500 includes the A / D converter 510 and the envelope detector. 520.

In addition, in this embodiment, the predetermined output signal outputted to roughly detect the resonant frequency of the terrestrial antenna at the beginning of the selection coefficient detection operation uses a synthesized frequency obtained by combining all of the resonant frequencies of the terrestrial antenna into one. In this case, the grounder has five signal types (G signal (98 kHz), YG signal (106 kHz), Y signal (114 kHz), YY signal (122 kHz), and R signal (130 kHz)). Therefore, the input signal applied to the ground person through the signal input means 300 at the beginning of the selection coefficient detection operation is a frequency obtained by synthesizing the five frequencies (98 kHz, 106 kHz, 114 kHz, 122 kHz, 130 kHz).

Hereinafter, the configuration and operation of the present embodiment will be described in detail with reference to the accompanying drawings.

First, as shown in FIGS. 7 and 9, the NCO 120 is connected to the signal output terminal 117 of the DSP 110, and the D / A converter 140 is connected to the signal output terminal 116. The first amplifier 310 is connected to the signal output terminal of the NCO 120 and the D / A converter 140, and the primary coil 320 is connected to the signal output terminal of the first amplifier 310. The pickup coil 410a, which is the second amplifier 410, is connected to the signal output terminal of the primary coil 320 and the secondary coil 420 coupled with a predetermined coupling degree, and to the signal output terminal of the pickup coil 410a. The second zero crossing detector 150a, which is the output signal detection unit 150, is connected, and the signal output terminal of the second zero crossing detector 150a is connected to the signal input terminal of the counter 117. At this time, the other zero input terminal of the counter 117 is connected to the first zero crossing detector 120a, which is an input signal detector 120 for zero crossing the output signal of the NCO 120.

Also, an envelope detector 520 is connected to a common connection point of the pickup coil 410a and the second zero crossing detector 150a, and an A / D converter 510 is connected to a signal output terminal of the envelope detector 520. ), The signal output terminal of the A / D converter 510 is connected to the signal input terminal 119 of the DSP 110, and a communication device (eg, RS-) is connected to the communication port 115 of the DSP 110. This embodiment is configured by connecting the notebook computer 200 through 232.

In this case, the ROM 111 of the DSP 110 stores a low pass algorithm, a synthesis frequency of the terrestrial earth, and a predetermined program for other control.

Hereinafter, the present embodiment configured as described above will be described in detail with reference to FIG. 8.

First, when power is applied to the present device mounted on a train, the CPU 113 of the DSP 110 performs five synthetic frequencies stored in the ROM 111, that is, the grounder has five in order to detect the resonance frequency of the ground. After reading the data about the synthesized frequency synthesized resonant frequency converted to an analog signal through the D / A converter 140 and continuously output through the first amplifier 310 and the primary coil 320, 2 Continuously detects an output signal input through the car coil 420, the pickup coil 410a, and the A / D converter 510, and whether or not a signal corresponding to the synthesized frequency exists (that is, flows into the secondary coil). Continuously, and if there is a signal to be detected, the signal detected through the pickup coil 410a is counted through the second zero crossing detector 150a and the counter 117. To detect the resonance frequency of the ruler The coarse frequency detection step S10 is performed. Here, "rough" is a term used to distinguish the actual resonant frequency because it is not certain whether the resonant frequency of the terrestrial ground responding to the synthesized frequency is the resonant frequency of the terrestrial ground.

When performing the schematic frequency detection step (S10), the CPU 113 does not perform arithmetic operation, thereby enabling high-speed A / D conversion and D / A conversion, thereby reducing the rough resonance frequency for a short time. Can be detected within.

Figure 10 shows the components used when the coarse frequency detection step (S10) to detect the resonant frequency of the ground roughly, after collecting the data (corresponding frequency corresponding to the synthesis frequency) for a certain time, The time required to detect the rough resonance frequency from about 2msec.

On the other hand, after the rough frequency detection step (S10) to detect the ground frequency of the ground roughly, between the input signal input to the primary coil 320 and the output signal detected by the secondary coil 420 and increase or decrease of the frequency of the input signal so that the phase difference is -45 ^0, a first cut-off frequency detecting step (S20) to recognize the frequency of the input signal in which the phase difference -45 ⁰ to the first cut-off frequency, the phase difference is -90 Resonant stage frequency detection step (S30) for recognizing the frequency of the input signal to be ⁰ as the resonant frequency, and second cut-off frequency detection step (S40) for recognizing the frequency of the input signal with the phase difference of -135 ⁰ as the second cut-off frequency Done.

That is, the CPU 113 accurately increases or decreases the coarse resonance frequency obtained by performing the coarse frequency detecting step S10 through the NCO 120, and inputs the signal to the signal input means 300 while outputting the NCO 120. The signal is input to the counter 117 through the first zero crossing detector 120a, and the signal output from the signal detecting means 400 is input to the counter 117 through the second zero crossing detector 150a ( That is, by detecting the phase difference, the frequency of the input signal in which the phase difference between the input signal input to the signal input means 300 and the output signal output from the signal detection means 400 becomes -45 ⁰ is detected, and the detection The first cut-off frequency detection step (S20) of recognizing and storing the received frequency as the first cut-off frequency is performed.

In this case, the magnitude of the output signal when the phase difference between the input signal and the output signal is -45 ⁰ is detected by the envelope detector 520 and converted into a digital signal by the A / D converter 510. Will be saved.

In the same manner, the resonant frequency detection step S30 and the second cut-off frequency detection step S40 are performed, and the frequency when the phase difference between the input signal and the output signal is -90 ⁰ is stored as the resonant frequency with its magnitude. Then, the frequency when the phase difference is -135 ⁰ is set as the second blocking frequency and stored together with the magnitude.

Here, when the phase difference between the input signal and the output signal is -45 ⁰ , -90 ⁰ , -135 ⁰ , the first cut-off frequency, the resonant frequency, and the second cut-off frequency are respectively recognized. This is because the phase difference between the time input signal and the output signal is -45 ⁰ as the first cut-off frequency, -90 ⁰ as the resonant frequency, and -135 ⁰ as the second cut-off frequency.

In addition, the reason for detecting the magnitude of the frequency by using the envelope detector 520 in the above step is that the CPU 113 performs a fast A / D conversion operation due to the calculation operation (that is, the DPLL algorithm). Because it is difficult.

11 shows the first cut-off frequency detection step (S20), the resonant frequency detection step (S30), and the second cut-off frequency detection step (S40) to perform a first cut-off frequency, a resonant frequency, and a second cut-off frequency. And components used when detecting their respective sizes.

On the other hand, the first cut-off frequency detection step (S20), the resonant frequency detection step (S30), and the second cut-off frequency detection step (S40) by performing the first cut-off frequency, the resonance frequency, the second cut-off frequency and After detecting the respective sizes, a bandwidth calculation step (S50) of calculating a bandwidth from the first blocking frequency and a second blocking frequency, and a selection coefficient calculation step of calculating a Q value from the bandwidth and the resonance frequency (S60). ) Respectively.

At this time, when calculating the bandwidth and the Q value in the bandwidth calculation step (S50) and the selection coefficient detection step (S60), the first cut-off frequency detected when the phase difference is -45 ⁰ , -90 ⁰ , -135 ⁰ , In parallel with the operation of calculating the bandwidth and the Q using the resonance frequency and the second blocking frequency, the operation of calculating the bandwidth and the Q value from the magnitudes of the first blocking frequency, the resonance frequency, and the second blocking frequency is performed.

Here, the reason why the bandwidth and the Q value are doubled from the frequency and the magnitude thereof is that the Q value calculated using the resonance frequency and the cutoff frequency (the first cutoff frequency and the second cutoff frequency) is the resonant frequency and the cutoff frequency. This is to check whether or not the value of Q corresponds to the calculated Q value.

For reference, configuration 1 and configuration 2 of the present invention is to calculate the Q value only the resonance frequency and the cutoff frequency. That is, in Configuration 1 and Configuration 2, the operation of checking whether the calculated Q is correct is not performed.

On the other hand, after calculating the selection coefficient by performing the first cut-off frequency detection step (S20), the resonant frequency detection step (S30), and the second cut-off frequency detection step (S40), the calculated Q value is used as the communication port. A display step (S70) for transmitting the data to the notebook computer 200 through the 115 and displaying the value, and a storage step (S80) for storing in the database are performed.

For reference, the time required for calculating the Q value and displaying the resonance frequency by detecting the resonance frequency is within 8 msec.

Hereinafter, a summary of the above process will be described.

First, when the train is operated while the device is mounted on a train, the CPU 113 performs the coarse frequency detecting step S10 to continuously output the synthesized frequency through the primary coil 320. Will be performed.

Then, when a grounder is present on the driving path of the train and a signal corresponding to the synthesized frequency is detected, the signal is recognized as a rough resonance frequency and then the first cut-off frequency detection step S20 is performed.

Here, the reason for detecting the coarse resonance frequency by performing the coarse frequency detecting step (S10) is to reduce the time required to find the current coherent frequency among the various resonant frequencies that the ground has.

For reference, the time when the train automatic stop device detects the response frequency of the ground man during the train operation is about 9.6msec when the response range is 400mm and the speed of the train is 150km / h. In order to measure the Q of the ground driver while driving, the operation must be completed within the above 9.6 msec.

On the other hand, after roughly detecting the resonant frequency of the ground in the schematic frequency detection step (S10), the phase difference between the input signal and the output signal by precisely adjusting the input signal input to the primary coil through the NCO 120 Detects the frequency of the input signal at -45 ⁰ , -90 ⁰ , and -135 ⁰ and sequentially sets it as the first cut-off frequency, the resonant frequency, and the second cut-off frequency, and then calculates the bandwidth from the frequency to detect the Q value. In addition, by detecting the bandwidth and the Q value from the magnitude of the resonant frequency and the cutoff frequency, it is checked whether the Q value calculated from the resonant frequency and the cutoff frequency is correct.

Thereafter, the calculated Q value is transmitted to the notebook computer through the communication port 115 and the communication device (for example, RS-232) to display the value and stored in a database. The above process is repeated. By doing so, it is possible to easily measure the Q values of all the grounders installed on the train tracks.

In other words, when the train section of the train is operated while the device is mounted, it automatically measures and displays the Q of the ground person installed in each track section, and the value is databased so that it can be easily used for future maintenance. Will be.

However, in the above embodiment, although not described for convenience of description, by installing the present measuring device at the front and rear ends of the train, respectively, the Q and the absolute stop of the ground's response frequency (resonant frequency) for the preceding train. Note that it is possible to measure Q for the resonance frequency representing (R signal).

This will be described as follows.

As is well known, when a train enters a certain grounder-installed rail segment and moves to the next ground-manufactured rail segment, the grounder initially shows the resonant frequency of the command speed for the preceding train and later stops. The resonance frequency is shown.

In other words, when a train spans two lander-installed track sections, it initially displays a specific resonant frequency (speed command signal for the preceding train), but never stops when the train enters the next track section in the direction of travel. Resonance frequency is represented.

Therefore, when the measuring device is installed at the front and rear ends of a train to detect the resonant frequency of the same ground, at first, a specific resonant frequency (eg, G signal, YG signal, Y signal, YY signal for the preceding train) is detected. It is possible to measure Q for any one of the above and later measure Q for the resonance frequency (R signal) indicating absolute stop.

The reason for measuring Q for each resonant frequency as described above is that in the case of the ground person, the Q value for each resonant frequency is different from each other.

On the other hand, in the above embodiment, the example in which the selection coefficient detection means is configured using the DPLL has been described, but it is understood that the analog phase locked loop can be configured using the analog phase locked loop.

In addition, in the above embodiment, although the primary coil and the secondary coil were configured as separate devices, it can be understood that the primary coil and the secondary coil of the vehicle automatic stop device car box can be configured.

In the above embodiment, only the Q value detected by the selection coefficient detecting means is transmitted to the notebook computer (display means and storage means). However, in addition to the Q value, the resonance frequency and the cutoff frequency may be transmitted in parallel. To reveal. At this time, the database includes the contents of the resonance frequency and the cutoff frequency.

In addition, in the above embodiment, the case where the ground has five resonant frequencies has been described as an example, but the embodiment according to the technical idea of the present invention is not limited thereto.

In addition, in the above-described embodiment, the case of the measuring device mounted on the train has been described, but the embodiment according to the technical idea of the present invention is not limited thereto.

In the above embodiment, when the phase difference between the input signal and the output signal is -45 °, -90 °, or -135 °, the first cutoff frequency, the resonant frequency, and the second cutoff frequency are explained. It is noted that the minus sign (-) in front of each phase difference is only a distinction by the notation method on the frequency-phase curve, and the same applies to the use of + 45 °, + 90 °, and + 135 °.

In addition, in the above embodiment, although the low pass filter function is performed by the control unit of each configuration, it is understood that the object of the present invention can be achieved by performing the proportional integral control function. At this time, the proportional integral control function is implemented by a program (algorithm) in the DSP.

As described above, the present invention " apparatus and method for measuring the selection coefficient of the ground automatic stop device grounder " particularly, between the input signal input to the ground and the output signal output from the ground when the ground is in a resonance state. By detecting the resonant frequency and the cutoff frequency using the frequency-phase characteristic, and detecting the Q value from the detected resonant frequency and the cutoff frequency, the Q value can be accurately measured and can be measured quickly. Normally operating while mounted on the train, it is effective to automatically detect the ground Q.

In addition, the Q measuring device is mounted on the train for normal operation and automatic measurement, thus eliminating the need for Q measurement at all, and making it possible to quickly measure grounders installed in all sections of the track. There is an effect of easy maintenance and repair.

In addition, since the Q measuring device is mounted on the train to measure the Q of the ground man during normal operation, there is an effect that it is possible to measure the Q in the actual situation in which the train operates.

In addition, the Q measuring device is composed of DPLL and other digital elements, so there is little error in the surrounding environment, and because the measuring method uses the frequency-phase characteristic, the influence on the measurement distance can be neglected, so that the objective measurement is always performed. There is an effect that can be done.

Claims (20)

A signal input means comprising: a first amplifier and a primary coil, amplifying an input signal of a predetermined frequency applied to the grounder by mutual magnetic induction coupling; A signal detecting means comprising a second amplifier and a secondary coil to detect an output signal output from the ground wave by a frequency drawing phenomenon; It includes a phase synchronization loop (PLL) circuit, the phase difference between the input signal input to the signal input means and the output signal output from the signal detection means -45 ° (or 45 °), -90 ° (or 90 ° ) And -135 ° (or 135 °), respectively, and then detect the frequency of the input signal with respect to each phase difference, and replace the frequency of the input signal when the phase difference is -45 ° (or 45 °) with the first cut-off frequency, The frequency of the input signal at -90 ° (or 90 °) is the resonant frequency, and the frequency of the input signal at -135 ° (or 135 °) is the second cut-off frequency, and the first cut-off frequency and the second cut-off frequency Selection coefficient detection means for calculating a selection coefficient Q from a bandwidth and a resonance frequency between the internal and secondary frequencies; Display means for indicating a selection coefficient detected through said selection coefficient detection means; And a storage means for storing a database of the selection coefficients detected by the selection coefficient detection means and storing them in a database. 2. The apparatus of claim 1, wherein the selection coefficient detecting means comprises: a phase difference detecting unit detecting a phase difference between an input signal inputted to the signal input means and an output signal outputted from the signal detecting means; Connected to the signal output terminal of the phase difference detecting unit, first, a predetermined input signal for roughly detecting the resonant frequency of the ground signal is initially outputted at the beginning of the selection coefficient detection operation; and second, the predetermined frequency of the ground signal is output by outputting the predetermined input signal. After roughly detecting, the phase difference between the input signal and the output signal output from the phase difference detection unit is -45 ° (or 45 °), -90 ° (or 90 °), or -135 ° (or 135 °). The frequency of the input signal is increased or decreased so that the frequency of the input signal is increased so that the frequency of the input signal when the phase difference between the input signal and the output signal is -45 ° (or 45 °) is the first blocking frequency, -90. The frequency of the input signal at ° (or 90 °) is the resonant frequency, and the frequency of the input signal at -135 ° (or 135 °) is the second cut-off frequency, and the first cut-off frequency and the second cut-off frequency Bandwidth and resonance frequency between A control unit for calculating a selection coefficient (Q), third, outputting a signal for the calculated selection coefficient to display means and storage means, and fourth, performing a low pass filter or a proportional integral control function; A D / A converter connected to the signal output terminal of the control unit and operated at an initial stage of the selection coefficient detection operation to convert a predetermined input signal for roughly detecting the resonance frequency of the terrestrial signal into an analog signal and output the analog signal to a signal input means; It is connected to the signal output terminal of the control unit and operates when detecting an accurate resonant frequency and a first cutoff frequency and a second cutoff frequency after detecting a rough resonant frequency of the ground, to precisely control the frequency of the input signal input to the ground. A numerically controlled sinusoidal wave generator (NCO); An input signal detector for detecting an input signal output from the numerically controlled sinusoidal wave generator and inputting the input signal to the phase difference detector; And an output signal detection unit for inputting the output signal output from the signal detection unit to the phase difference detection unit. The ground of claim 2, wherein the phase difference detection unit comprises a counter or a timer for detecting a phase difference by measuring a period of an input signal and an output signal input from the input signal detector and the output signal detector. Ruler selection coefficient measuring device. 3. The method of claim 2, wherein the predetermined input signal outputted by the control unit in order to detect the resonant frequency of the ground at the beginning of the selection coefficient detection operation is composed of all the resonant frequencies of the ground and sequentially outputs them. Selective coefficient measuring device of a train automatic stop device ground, characterized in that. The predetermined input signal output by the control unit to roughly detect the resonant frequency of the terrestrial wave at the beginning of the selection coefficient detection operation is the intermediate frequency of the frequency bands indicated by the resonant frequencies of the terrestrial earth. Selective coefficient measuring device of a train automatic stop device characterized in that the configuration. 3. The method of claim 2, wherein the predetermined input signal outputted by the control unit to roughly detect the resonant frequency of the ground at the beginning of the selection coefficient detection operation is composed of a synthesized frequency obtained by combining all of the resonant frequencies of the ground. Selective coefficient measuring device of a train automatic stop device ground, characterized in that. 3. The apparatus of claim 2, wherein the input signal detector or the output signal detector comprises a zero crossing detector for detecting a zero crossing point of the input signal or the output signal. 3. The digital signal processor of claim 2, wherein the phase difference detector, the controller, the D / A converter, the numerically controlled sinusoidal wave generator (NCO), the input signal detector, and the output signal detector are the digital signal processing processor. DSP) and a phase difference detection unit using a counter or timer of the digital signal processing processor, and an input signal detection unit and an output signal detection unit are constituted by a digital phase synchronization loop (DPLL) circuit composed of zero crossing detectors. Selective coefficient measuring device for train automatic stop device. 3. The apparatus of claim 2, wherein the second amplification part of the signal detecting means comprises a pickup coil. 3. The apparatus of claim 2, wherein the display means and the storage means comprise a computer. A signal input means comprising a first amplifier and a primary coil and amplifying a predetermined input signal to be applied to a ground person by mutual magnetic induction coupling; A signal detecting means comprising a second amplifier and a secondary coil to detect an output signal output from the ground wave by a frequency drawing phenomenon; It includes a phase synchronization loop (PLL) circuit, the phase difference between the input signal input to the signal input means and the output signal output from the signal detection means -45 ° (or 45 °), -90 ° (or 90 ° ) And -135 ° (or 135 °), respectively, and then detect the frequency of the input signal with respect to each phase difference, and replace the frequency of the input signal when the phase difference is -45 ° (or 45 °) with the first cut-off frequency, The frequency of the input signal at -90 ° (or 90 °) is the resonant frequency, and the frequency of the input signal at -135 ° (or 135 °) is the second cut-off frequency, and the first cut-off frequency and the second cut-off frequency Selection coefficient detection means for calculating a selection coefficient Q from a bandwidth and a resonance frequency between the internal and secondary frequencies; Display means for indicating a selection coefficient detected through said selection coefficient detection means; In the selection coefficient measuring method of the "train automatic stop device ground coefficient selection coefficient measuring device" characterized in that it comprises a storage means for storing the database of the selection coefficient detected by the selection coefficient detection means; In the selection coefficient measuring method, the predetermined coefficient detection means applies a predetermined input signal to the ground person through the signal input means in order to detect the resonance frequency of the ground person at the initial operation of the selection coefficient measurement. A coarse frequency detection step of detecting a resonant frequency of the terrestrial ground responding to a predetermined input signal through signal detection means to detect the resonant frequency of the terrestrial ground; The coarse frequency detected step is performed so that the phase difference between the input signal applied to the ground party through the signal input means and the output signal of the ground signal detected through the signal detection means is -45 ° (or 45 °). A first cut-off frequency detection step of precisely adjusting the resonant frequency to make the frequency of the input signal when the phase difference is -45 ⁰ (or 45 °) as the first cut-off frequency; The coarse frequency detected step is performed so that the phase difference between the input signal applied to the ground party through the signal input means and the output signal of the ground signal detected through the signal detection means is -90 ° (or 90 °). A resonance frequency detection step of precisely adjusting the resonance frequency to set the frequency of the input signal when the phase difference is -90 ⁰ (or 90 °) as the resonance frequency; The coarse frequency detected step is performed so that the phase difference between the input signal applied to the ground user through the signal input means and the output signal of the ground signal detected through the signal detection means is -135 ° (or 135 °). A second cut-off frequency detection step of precisely adjusting the resonant frequency to make the frequency of the input signal when the phase difference is -135 ⁰ (or 135 °) as a second cut-off frequency; Calculating a bandwidth between the first cut-off frequency detected in the first cut-off frequency detection step and the second cut-off frequency detected in the second cut-off frequency detection step; A selection coefficient calculation step of calculating a selection factor Q by dividing the resonance frequency detected in the resonance frequency detection step by the bandwidth calculated in the bandwidth calculation step; A display step of displaying on the display means the selection coefficient calculated in the selection coefficient calculation step; And a storage step of storing the selection coefficient calculated in the selection coefficient calculation step in a database. 12. The method of claim 11, wherein the predetermined input signal applied to roughly detect the resonant frequency of the ground in the coarse frequency detection step comprises all the resonant frequencies of the ground and outputs them sequentially. Control method of the selection coefficient measuring device of a train automatic stop device ground. 12. The method according to claim 11, wherein the predetermined input signal applied to roughly detect the resonant frequency of the ground in the schematic frequency detection step is composed of an intermediate frequency among the frequency bands indicated by the respective resonant frequencies of the ground. Control method of a selective coefficient measuring device for a train automatic stopper. 12. The method according to claim 11, wherein the predetermined input signal applied to roughly detect the resonant frequency of the ground in the schematic frequency detection step comprises a synthesized frequency obtained by synthesizing all of the resonant frequencies of the ground. Control method of the selection coefficient measuring device of a train automatic stop device ground. A signal input means comprising: a first amplifier and a primary coil, amplifying an input signal of a predetermined frequency applied to the grounder by mutual magnetic induction coupling; A signal detecting means comprising a second amplifier and a secondary coil to detect an output signal output from the ground wave by a frequency drawing phenomenon; A size detecting means including an A / D converter (analog / digital converter) for detecting the magnitude of the output signal detected by the signal detecting means, converting the signal into a digital signal, and outputting the digital signal; It includes a phase locked loop (PLL) circuit, the phase difference between the input signal and the output signal of the signal input means and the signal detection means -45 ° (or 45 °), -90 ° (or 90 °), -135 After fixing them at degrees (or 135 degrees), the frequency of the input signal for each phase difference is detected, and the frequency of the input signal when the phase difference is -45 degrees (or 45 degrees) is set as the first blocking frequency, -90 degrees ( Or 90 °), and the frequency of the input signal at the resonance frequency, -135 ° (or 135 °) is the second cutoff frequency, and the bandwidth and resonance between the first cutoff frequency and the second cutoff frequency. The selection coefficient Q is calculated from the frequency, and the phase difference between the input signal and the output signal is -45 ° (or 45 °) or -90 ° (or 90 °), -135 ° (or 135 °), the magnitude of the first cut-off frequency, resonant frequency, second cut-off frequency Group and selected coefficient detecting means for detecting whether or not; Display means for indicating a selection coefficient detected through said selection coefficient detection means; And a storage means for storing a database of the selection coefficients detected by the selection coefficient detection means. 16. The apparatus of claim 15, wherein the selection coefficient detecting means comprises: a phase difference detecting portion for detecting a phase difference between an input signal input to the signal input means and an output signal output from the signal detecting means; Connected to the signal output terminal of the phase difference detecting unit, first, a predetermined input signal for roughly detecting the resonant frequency of the ground wave is output at the beginning of the selection coefficient detection operation; After roughly detecting, the phase difference between the input signal and the output signal output from the phase difference detection unit is -45 ° (or 45 °), -90 ° (or 90 °), or -135 ° (or 135 °). The frequency of the input signal is increased or decreased so that the frequency of the input signal is increased so that the frequency of the input signal when the phase difference between the input signal and the output signal is -45 ° (or 45 °) is the first blocking frequency, -90. The frequency of the input signal at ° (or 90 °) is the resonant frequency, and the frequency of the input signal at -135 ° (or 135 °) is the second cut-off frequency, and the first cut-off frequency and the second cut-off frequency Bandwidth and resonance frequency A tack coefficient Q is calculated; third, a signal for the calculated selection coefficient is output to the display means and the storage means; fourth, a low pass filter or a proportional integral control function; and fifth, in the size detection means. Compare the magnitude of the applied output signal, and when the phase difference between the input signal and the output signal is -45 ° (or 45 °), -90 ° (or 90 °), or -135 ° (or 135 °), respectively A control unit for detecting whether the first satisfactory frequency, the resonant frequency, and the second blocking frequency are satisfied; A D / A converter connected to the signal output terminal of the control unit and operated at an initial stage of the detection coefficient detection operation to convert a predetermined input signal for roughly detecting the resonant frequency of the terrestrial signal into an analog signal and output the analog signal to a signal input means; It is connected to the signal output terminal of the control unit and operates when detecting an accurate resonant frequency and a first cutoff frequency and a second cutoff frequency after detecting a rough resonant frequency of the ground, to precisely control the frequency of the input signal input to the ground. A numerically controlled sinusoidal wave generator (NCO); An input signal detector for detecting a frequency of an input signal output from the numerically controlled sinusoidal wave generator and inputting the detected phase signal to the phase difference detector; And an output signal detection unit for inputting the output signal output from the signal detection unit to the phase difference detection unit. 16. An output signal detected by the signal detecting means according to claim 15, wherein said magnitude detecting means comprises an A / D converter which converts the output signal detected by said signal detecting means into a digital signal and inputs it to a control part. An envelope detector for detecting only the magnitude of the train and an A / D converter for converting the signal output from the envelope detector into a digital signal and inputting it to a control unit. . A signal input means comprising: a first amplifier and a primary coil, amplifying an input signal of a predetermined frequency applied to the grounder by mutual magnetic induction coupling; A signal detecting means comprising a second amplifier and a secondary coil to detect an output signal output from the ground wave by a frequency drawing phenomenon; A size detecting means including an A / D converter (analog / digital converter) for detecting the magnitude of the output signal detected by the signal detecting means, converting the signal into a digital signal, and outputting the digital signal; It includes a phase locked loop (PLL) circuit, the phase difference between the input signal and the output signal of the signal input means and the signal detection means -45 ° (or 45 °), -90 ° (or 90 °), -135 After fixing them at degrees (or 135 degrees), the frequency of the input signal for each phase difference is detected, and the frequency of the input signal when the phase difference is -45 degrees (or 45 degrees) is set as the first blocking frequency, -90 degrees ( Or 90 °), and the frequency of the input signal at the resonance frequency, -135 ° (or 135 °) is the second cutoff frequency, and the bandwidth and resonance between the first cutoff frequency and the second cutoff frequency. The selection coefficient Q is calculated from the frequency, and the phase difference between the input signal and the output signal is -45 ° (or 45 °) or -90 ° (or 90 °), -135 ° (or 135 °), the magnitude of the first cut-off frequency, resonant frequency, second cut-off frequency Group and selected coefficient detecting means for detecting whether or not; Display means for indicating a selection coefficient detected through said selection coefficient detection means; In the selection coefficient measuring method of the "train automatic stop device ground coefficient selection coefficient measuring device" characterized in that it comprises a storage means for storing a database of the selection coefficient detected by the selection coefficient detection means, In the selection coefficient measuring method, the predetermined coefficient detection means applies a predetermined input signal to the ground person through the signal input means in order to detect the resonance frequency of the ground person at the initial operation of the selection coefficient measurement. A coarse frequency detection step of detecting a resonant frequency of the terrestrial ground responding to a predetermined input signal through signal detection means to detect the resonant frequency of the terrestrial ground; The coarse frequency detected step is performed so that the phase difference between the input signal applied to the ground party through the signal input means and the output signal of the ground signal detected through the signal detection means is -45 ° (or 45 °). A first cut-off frequency detection step of precisely adjusting the resonant frequency to make the frequency of the input signal when the phase difference is -45 ⁰ (or 45 °) as the first cut-off frequency; The coarse frequency detected step is performed so that the phase difference between the input signal applied to the ground party through the signal input means and the output signal of the ground signal detected through the signal detection means is -90 ° (or 90 °). A resonance frequency detection step of precisely adjusting the resonance frequency to set the frequency of the input signal when the phase difference is -90 ⁰ (or 90 °) as the resonance frequency; The coarse frequency detected step is performed so that the phase difference between the input signal applied to the ground user through the signal input means and the output signal of the ground signal detected through the signal detection means is -135 ° (or 135 °). A second cut-off frequency detection step of precisely adjusting the resonant frequency to make the frequency of the input signal when the phase difference is -135 ⁰ (or 135 °) as a second cut-off frequency; Calculating a bandwidth between the first cut-off frequency detected in the first cut-off frequency detection step and the second cut-off frequency detected in the second cut-off frequency detection step; The resonant frequency detected in the resonant frequency detection step is divided by the bandwidth calculated in the bandwidth calculation step to calculate a selection coefficient Q, and the phase difference between the input signal and the output signal is -45 ⁰ ( Or 45 °), -90 ⁰ (or 90 °), -135 ⁰ (or 135 °), and compare the magnitude of the detected signal to calculate the selection coefficient (Q), and then the resonance frequency and the cutoff frequency A selection coefficient calculation step of checking whether the selection coefficient calculated by the controller and the selection coefficient calculated by detecting the magnitudes of the resonance frequency and the cutoff frequency are the same; A display step of displaying on the display means the selection coefficient calculated in the selection coefficient calculation step; And a storage step of storing the selection coefficient calculated in the selection coefficient calculation step in a database. 19. The method according to claim 18, wherein when the selection coefficient is calculated by the magnitude of the output signal in the selection coefficient calculation step, the magnitude detection means detects when the phase difference between the input signal and the output signal is -45 ⁰ (or 45 °). of the output signal size, and a -90 ⁰ (or 90 °) to the size of a detected output signal when the magnitude of the output signal is detected, -135 ⁰ (or 135 °) when compared to the -45 ⁰ (or 45 °), -90 ⁰ (or 90 °), -135 ⁰ (or 135 °), the ratio of the magnitude of the detected output signal sequentially satisfies the first cut-off frequency, the resonance frequency, and the second cut-off frequency Control method of the selection coefficient measuring device of a train automatic stop device ground, characterized in that for determining whether to output a signal for this. 19. The display method according to claim 18, wherein when the selection coefficient is displayed in the display step, the selection coefficient calculated based on the phase difference, the selection coefficient calculated based on the magnitude of the output signal, and whether or not the match is shown together are shown. Automatic control system for trains.