Track circuit signal generation method, analysis method and related system

Abstract

The invention provides a track circuit signal generation method, an analysis method and a related system, and relates to the technical field of track signals.The track circuit signal generation method comprises the steps that for any steel rail section, a first train control module sends control information to a signal generation module corresponding to the steel rail section; a signal generation module corresponding to the steel rail section determines a target signal frequency in the signal frequencies according to the control information; the number of the target signal frequencies is at least one; a signal generation module corresponding to the steel rail section generates a track circuit signal based on the target signal frequency and the carrier frequency corresponding to the steel rail section; the track circuit signals are used for controlling the running state of the train. According to the invention, the quantity of the control information represented by the signal frequency can be increased, and the requirement of transmitting more types of control information is met.

Description

Technical Field

[0001] The present invention relates to the field of track signal technology, and in particular to a track circuit signal generation method, an analysis method and a related system. Background Art

[0002] At present, there are 18 signal frequencies in the ZPW-2000A track circuit system, with a frequency range of 10.3Hz to 29Hz, and the frequency values ​​of each signal frequency form an arithmetic progression with 1.1 as the tolerance and 10.3 as the first term. There are 8 carrier frequencies in the ZPW-2000A track circuit system, namely 1700+1.4Hz, 1700-1.3Hz, 2000+1.4Hz, 2000-1.3Hz, 2300+1.4Hz, 2300-1.3Hz, 2600+1.4Hz, 2600-1.3Hz.

[0003] Among them, one rail section corresponds to one carrier frequency, and one signal frequency represents a control information. When controlling the running status of the train, the signal of the corresponding signal frequency is "shifted" to the signal of the corresponding carrier frequency by frequency shift keying, and then the signal of the carrier frequency is "transferred" to the corresponding rail. The train passing by the rail will collect the signal of the signal frequency and control its own running status according to the control information corresponding to the signal of the signal frequency.

[0004] However, the existing technology has a limited amount of control information represented by signal frequencies, which makes it difficult to meet the demand for transmitting more types of control information. Summary of the invention

[0005] In order to solve the problem in the prior art that the amount of control information represented by the signal frequency is limited and it is difficult to meet the demand for transmitting more types of control information, the present invention provides a track circuit signal generation method, analysis method and related system.

[0006] The technical solution of the present invention is as follows:

[0007] The present invention provides a track circuit signal generation method, which is applied to a first track circuit signal system. The first track circuit signal system includes a first train control module and signal generation modules corresponding to a plurality of rail sections. The track circuit signal generation method includes:

[0008] For any of the rail sections, the first train control module sends control information to the signal generation module corresponding to the rail section;

[0009] The signal generation module corresponding to the rail section determines a target signal frequency among various signal frequencies according to the control information; the number of the target signal frequency is at least one;

[0010] The signal generating module corresponding to the rail section generates a track circuit signal based on the target signal frequency and the carrier frequency corresponding to the rail section; the track circuit signal is used to control the running state of the train.

[0011] Optionally, before the first train control module sends control information to the signal generation module corresponding to the rail section, the track circuit signal generation method further includes:

[0012] The first train control module generates the control information according to the rail data of the rail section; the rail data includes at least one of the rail usage status, the rail external shape and the track information within the station.

[0013] The present invention further provides a track circuit signal analysis method, which is applied to a second track circuit signal system, wherein the second track circuit signal system includes a plurality of signal processing modules corresponding to rail sections respectively. The track circuit signal analysis method includes:

[0014] For any of the rail sections, the signal processing module corresponding to the rail section collects track circuit signals of the rail section at a preset sampling frequency within a preset time period to obtain collected data; the track circuit signals are generated using the track circuit signal generation method as described above;

[0015] The signal processing module corresponding to the rail section performs analog-to-digital conversion on each electrical signal in the collected data to obtain the value of each electrical signal;

[0016] The signal processing module corresponding to the rail section calculates a first actual amplitude of a first spectrum line corresponding to the carrier frequency corresponding to the rail section based on the values ​​of each of the electrical signals;

[0017] The signal processing module corresponding to the rail section determines whether the first actual amplitude is lower than a first preset amplitude threshold;

[0018] If the first actual amplitude is lower than the first preset amplitude threshold, the signal processing module corresponding to the rail section determines that there is no signal with a frequency of the carrier frequency in the collected data;

[0019] If the first actual amplitude is not lower than the first preset amplitude threshold, the signal processing module corresponding to the rail section determines that a signal having a frequency of the carrier frequency exists in the collected data.

[0020] Optionally, based on the values ​​of each of the electrical signals, calculating a first actual amplitude of a first spectrum line corresponding to the carrier frequency corresponding to the rail section specifically includes:

[0021] Based on the FFT (Fast Fourier Transform) principle, the product of the value of each electrical signal and the corresponding coefficient is summed to obtain the first actual amplitude; wherein the coefficient corresponding to the value of any one of the electrical signals is equal to, j is the ranking of the value of the electrical signal among all the values ​​of the electrical signals, k is the value obtained by adding the quotient of the preset sampling frequency and the carrier frequency to 1, and i is an imaginary unit.

[0022] Optionally, summing the products of the values ​​of the respective electrical signals and the corresponding coefficients to obtain the first actual amplitude specifically includes:

[0023] For each value of the electrical signal, obtaining a target coefficient corresponding to the value of the electrical signal from a preset database;

[0024] Calculating the product of the value of the electrical signal and the target coefficient to obtain a target product;

[0025] The sum of the target products corresponding to the values ​​of the electrical signals is calculated to obtain the first actual amplitude.

[0026] Optionally, after the signal processing module corresponding to the rail section determines that there is a signal with a frequency of the carrier frequency in the collected data, the track circuit signal analysis method further includes:

[0027] For each signal frequency, the signal processing module corresponding to the rail section calculates, based on the values ​​of each of the electrical signals, a second actual amplitude of a second spectrum line corresponding to the signal frequency and a third actual amplitude of a third spectrum line corresponding to the signal frequency;

[0028] The signal processing module corresponding to the rail section determines whether the second actual amplitude is equal to the third actual amplitude;

[0029] If the second actual amplitude is equal to the third actual amplitude, the signal processing module corresponding to the rail section determines whether the second actual amplitude is lower than a second preset amplitude threshold corresponding to the signal frequency;

[0030] If the second actual amplitude is lower than the second preset amplitude threshold, the signal processing module corresponding to the rail section determines that there is no signal with the frequency of the signal frequency in the collected data;

[0031] If the second actual amplitude is not lower than the second preset amplitude threshold, the signal processing module corresponding to the rail section determines that a signal with a frequency of the signal frequency exists in the collected data.

[0032] Optionally, the first preset amplitude threshold is equal to a first preset percentage of the theoretical amplitude of the first spectral line; or,

[0033] The first preset amplitude threshold is equal to the first preset percentage of the statistical amplitude of the first spectrum line when the rail section is not occupied by a train;

[0034] The second preset amplitude threshold is equal to a second preset percentage of the theoretical amplitude of the spectrum line of the signal frequency corresponding to the second preset amplitude threshold; or,

[0035] The second preset amplitude threshold is equal to the second preset percentage of the statistical amplitude of the spectrum line of the signal frequency corresponding to the second preset amplitude threshold when the rail section is not occupied by a train.

[0036] Optionally, the track circuit signal analysis method further includes: a signal processing module corresponding to the rail section generates an analysis result code;

[0037] Among them, the analysis result code includes the analysis result identifiers of the carrier frequency and each of the signal frequencies, and the analysis result identifier includes a first identifier and a second identifier, the first identifier indicates that there is a signal with a frequency of the corresponding frequency in the collected data, and the second identifier indicates that there is no signal with a frequency of the corresponding frequency in the collected data.

[0038] The present invention further provides a track circuit signal system, which is applied to the track circuit signal generation method as described above, and the track circuit signal system comprises: a first train control module and signal generation modules corresponding to a plurality of rail sections respectively;

[0039] Each of the signal generating modules is respectively communicatively connected to the first train control module.

[0040] The present invention also provides a track circuit signal system, which includes: a second train control module and signal processing modules corresponding to a plurality of rail sections respectively;

[0041] Each of the signal processing modules is respectively connected in communication with the second train control module;

[0042] Any one of the signal processing modules is used to adopt the track circuit signal analysis method as described above to obtain a track circuit signal analysis result, and send the track circuit signal analysis result to the second train control module.

[0043] The present invention adopts the above technical solution and has the following beneficial effects:

[0044] For any rail section, the first train control module sends control information to the signal generation module corresponding to the rail section; the signal generation module corresponding to the rail section determines the target signal frequency among various signal frequencies according to the control information; the number of target signal frequencies is at least one; the signal generation module corresponding to the rail section generates a track circuit signal based on the target signal frequency and the carrier frequency corresponding to the rail section; the track circuit signal is used to control the running status of the train.

[0045] Based on this, compared to the prior art in which one signal frequency represents one control information, in the present invention, at least one signal frequency is used to represent one control information. That is, in the present invention, in addition to each signal frequency representing one control information, a combination of two signal frequencies is used to represent one control information, and a combination of three signal frequencies is used to represent one control information, etc. This enables the present invention to increase the amount of control information represented by the signal frequency and meet the demand for transmitting more types of control information. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0047] Figure 1 It is a flow chart of a method for generating a track circuit signal provided by an embodiment of the present invention;

[0048] Figure 2 It is a structural schematic diagram of a track circuit signal system provided by an embodiment of the present invention;

[0049] Figure 3 It is a flow chart of a track circuit signal analysis method provided by an embodiment of the present invention;

[0050] Figure 4 It is a structural schematic diagram of another track circuit signal system provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] At present, there are 18 signal frequencies in the ZPW-2000A track circuit system, with a frequency range of 10.3Hz to 29Hz, and the frequency values ​​of each signal frequency form an arithmetic progression with 1.1 as the tolerance and 10.3 as the first term. There are 8 carrier frequencies in the ZPW-2000A track circuit system, namely 1700+1.4Hz, 1700-1.3Hz, 2000+1.4Hz, 2000-1.3Hz, 2300+1.4Hz, 2300-1.3Hz, 2600+1.4Hz, 2600-1.3Hz.

[0053] Among them, one rail section corresponds to one carrier frequency, and one signal frequency represents a control information. When controlling the running status of the train, the signal of the corresponding signal frequency is "shifted" to the signal of the corresponding carrier frequency by frequency shift keying, and then the signal of the carrier frequency is "transferred" to the corresponding rail. The train passing by the rail will collect the signal of the signal frequency and control its own running status according to the control information corresponding to the signal of the signal frequency.

[0054] However, in the above technical solution, since one signal frequency is used to represent one type of control information, in the above technical solution, 18 signal frequencies can only represent 18 types of control information and cannot represent more types of control information.

[0055] Based on this, in order to increase the amount of control information represented by the signal frequency and meet the demand for transmitting more types of control information, the present invention provides a track circuit signal generation method, analysis method and related system. The technical solution of the present invention is described in detail below in conjunction with the accompanying drawings.

[0056] Figure 1 The present invention provides a flow chart of a method for generating a track circuit signal. Figure 2 The track circuit signal system is shown.

[0057] like Figure 2 As shown, the track circuit signal system includes: a first train control module 21 and signal generation modules 22 corresponding to a plurality of rail sections respectively.

[0058] Each signal generating module 22 is respectively connected to the first train control module 21 for communication.

[0059] Each signal generating module 22 has the same structure, and the signal generating module 22 includes a first processor 221 , a second processor 222 and a frequency generator 223 .

[0060] The first processor 221 and the second processor 222 are respectively connected to the frequency generator 223 for communication, and the first processor 221 and the second processor 222 are also respectively connected to the first train control module 21 for communication.

[0061] In the embodiment of the present invention, each rail section corresponds to a signal generating module 22, and the signal generating module 22 may be a transmitter in the current track circuit signal system.

[0062] The signal generation modules 22 corresponding to each rail section are centrally controlled by the first train control module 21, which may be the current train control center. The first train control module 21 may send control information to each signal generation module 22 using a CAN (Controller Area Network) communication method.

[0063] refer to Figure 1 and Figure 2 , the track circuit signal generation method of the present invention comprises:

[0064] Step 101: For any rail section, the first train control module sends control information to the signal generation module corresponding to the rail section.

[0065] In an embodiment of the present invention, the control information may include train speed or road conditions, wherein the train speed is used to control the train running speed, and the road conditions are used to prompt the road conditions of the section ahead of the train, for example, prompting that the section ahead of the train is an uphill section or a turning section.

[0066] In the embodiment of the present invention, the signal frequency corresponding to each control information is preset. Specifically, the present invention sets each signal frequency to correspond to a control information, and the corresponding relationship between the control information and the signal frequency can adopt the current technical solution; in addition, the present invention also sets multiple signal frequencies to correspond to a control information, for example, two signal frequencies are set to correspond to a control information, and / or, three signal frequencies are set to correspond to a control information, and / or, more signal frequencies are set to correspond to a control information, and the present invention does not make specific limitations here.

[0067] The specific operation to realize that multiple signal frequencies correspond to one control information is: superimpose the carrier frequency signal (i.e., the signal with the frequency of the carrier frequency) controlled by two or more control signals (i.e., the signal with the frequency of the signal frequency) to realize that the same carrier frequency signal "carries" two or more control signals at the same time, such as using a control signal with a signal frequency of 10.3Hz, a control signal with a signal frequency of 18Hz, and a control signal with a signal frequency of 29Hz as a group of signal codes to jointly control a carrier frequency signal with a carrier frequency of 1700+1.4Hz and transmit it.

[0068] More specifically, the present invention sets two signal frequencies to correspond to one road condition, and three signal frequencies to correspond to the road condition of any track in the station, and the road condition may be whether the track is occupied by a train.

[0069] In a specific example, the present invention sets a carrier frequency signal under the control of a control signal with a signal frequency of 10.3 Hz and a control signal with a signal frequency of 18 Hz to represent that the train is traveling on an uphill section ahead, and a carrier frequency signal under the control of a control signal with a signal frequency of 10.3 Hz and a control signal with a signal frequency of 29 Hz to represent that the section ahead of the train is a curve section, etc. When the train receives the relevant carrier frequency signal and demodulates the signal frequency, it performs corresponding control according to the control information represented by the signal frequency.

[0070] In another specific example, the present invention sets a carrier frequency signal under the control of a control signal with a signal frequency of 10.3 Hz, a control signal with a signal frequency of 11.4 Hz, and a control signal with a signal frequency of 18 Hz to represent that the first track in the station is not occupied by a train. The staff in the station can conveniently perform train dispatch according to the carrier frequency signal.

[0071] Step 102: The signal generation module corresponding to the rail section determines a target signal frequency among various signal frequencies according to the control information; the number of the target signal frequency is at least one.

[0072] In the embodiment of the present invention, the signal generating module 22 determines the target signal frequency from various signal frequencies according to the control information and the corresponding relationship between the preset control information and the signal frequency.

[0073] Continuing with the above example, when the control information indicates that the train is travelling on an uphill section ahead, the target signal frequencies are 10.3 Hz and 18 Hz; when the control information indicates that the first track in the station is not occupied by a train, the target signal frequencies are 10.3 Hz, 11.4 Hz and 18 Hz.

[0074] Step 103: The signal generation module corresponding to the rail section generates a track circuit signal based on the target signal frequency and the carrier frequency corresponding to the rail section; the track circuit signal is used to control the running state of the train.

[0075] In an embodiment of the present invention, after the signal generating module 22 determines the target signal frequency, it activates the control signal corresponding to the target signal frequency, and then sends the control signal corresponding to the target signal frequency to the first processor 221 and the second processor 222. The first processor 221 controls the frequency generator 223 to modulate the control signal corresponding to the target signal frequency and the carrier frequency signal corresponding to the rail section to generate a carrier frequency signal modulated by the signal frequency, i.e., an FSK (Frequency-shift keying) signal.

[0076] For each of the first processor 221 and the second processor 222, the processor collects and analyzes the FSK signal to obtain the signal frequency of the control signal in the FSK signal, and then the processor compares the signal frequency with the target signal frequency. If the comparison results of the first processor 221 and the second processor 222 both show that the signal frequency of the control signal in the FSK signal is consistent with the target signal frequency, the first processor 221 or the second processor 222 outputs the FSK signal, which is the track circuit signal.

[0077] In the embodiment of the present invention, before step 101: the first train control module sends control information to the signal generation module corresponding to the rail section, the track circuit signal generation method further includes:

[0078] The first train control module generates control information according to the rail data of the rail section; the rail data includes at least one of the rail usage status, the rail external shape and the track information within the station.

[0079] In a specific example, when the rail usage status of the first track in the station is occupied by a train, the first train control module 21 can generate control information that the first track in the station is occupied by a train.

[0080] In another specific example, when a certain rail section is an uphill section, the first train control module 21 may generate control information to prompt the train that the section ahead is an uphill section.

[0081] In summary, compared to the scheme in which one signal frequency represents one control information, in the present invention, at least one signal frequency is used to represent one control information. That is, in the present invention, in addition to each signal frequency representing one control information, a combination of two signal frequencies is used to represent one control information, and a combination of three signal frequencies is used to represent one control information, etc. This enables the present invention to increase the amount of control information represented by the signal frequency and meet the demand for transmitting more types of control information.

[0082] After the signal generating module 22 outputs the track circuit signal to the corresponding rail section, the corresponding signal processing module is required to receive, analyze and determine the track circuit signal to complete the inspection of the use of the rail section.

[0083] In order to shorten the analysis time of the track circuit signal and improve its analysis speed when analyzing the track circuit signal, the present invention provides a track circuit signal analysis method. Figure 3 The present invention provides a flow chart of a track circuit signal analysis method. Figure 4 The track circuit signal system is shown.

[0084] like Figure 4 As shown, the track circuit signal system includes: a second train control module 41 and signal processing modules 42 corresponding to multiple rail sections respectively.

[0085] Each signal processing module 42 is respectively connected to the second train control module 41 for communication.

[0086] The structures of the signal processing modules 42 are the same, and the signal processing modules 42 include a third processor 421 , a fourth processor 422 and a signal collector 423 .

[0087] The third processor 421 and the fourth processor 422 are respectively connected to the signal collector 423 for communication, and the third processor 421 and the fourth processor 422 are also respectively connected to the second train control module 41 for communication.

[0088] Any one of the signal processing modules 42 is used to adopt the track circuit signal analysis method of the present invention to obtain a track circuit signal analysis result, and send the track circuit signal analysis result to the second train control module 41.

[0089] In the embodiment of the present invention, each rail section corresponds to a signal processing module 42 , and the signal processing module 42 may be a receiver in the current track circuit signal system.

[0090] The second train control module 41 may be the aforementioned first train control module 21 , and may receive the track circuit signal analysis results sent by each signal processing module 42 by means of CAN communication.

[0091] refer to Figure 3 and Figure 4 , the track circuit signal analysis method of the present invention comprises:

[0092] Step 301: for any rail section, a signal processing module corresponding to the rail section collects track circuit signals of the rail section at a preset sampling frequency within a preset time period to obtain collected data; the track circuit signals are generated using the track circuit signal generation method as described above.

[0093] In the embodiment of the present invention, the signal processing module 42 specifically collects the track circuit signal of the rail section through the internal signal collector 423. The signal collector 423 can specifically collect the voltage signal or current signal of the rail section within a preset time period according to a preset sampling frequency. This embodiment takes the collection of voltage signals as an example for explanation.

[0094] Step 302: The signal processing module corresponding to the rail section performs analog-to-digital conversion on each electrical signal in the collected data to obtain the value of each electrical signal.

[0095] In the embodiment of the present invention, after obtaining the collected data, the signal collector 423 may perform analog-to-digital conversion on each electrical signal in the collected data to obtain the value of each electrical signal.

[0096] Step 303: The signal processing module corresponding to the rail section calculates the first actual amplitude of the first spectrum line corresponding to the carrier frequency corresponding to the rail section based on the values ​​of each electrical signal.

[0097] In the embodiment of the present invention, in order to improve the accuracy of the analysis result, after obtaining the value of each electrical signal, the signal collector 423 generates a first binary sequence and a second binary sequence of the value of each electrical signal for each value of the electrical signal, and in the same base, the values ​​of the first binary sequence and the second binary sequence are both equal to the value of the electrical signal. Then, the signal collector 423 sends the first binary sequence of the value of each electrical signal to the third processor 421, and sends the second binary sequence of the value of each electrical signal to the fourth processor 422.

[0098] Then, the third processor 421 and the fourth processor 422 respectively parse the collected data according to the binary sequence they received. The parsing of the collected data includes parsing the carrier frequency situation (i.e., judging whether the collected data contains a signal whose signal frequency is the carrier frequency corresponding to the rail section) and parsing the signal frequency situation (i.e., when judging that the collected data contains a signal whose signal frequency is the carrier frequency corresponding to the rail section, judging the existence of the control signal corresponding to the signal frequency in 18 in the collected data).

[0099] When analyzing the carrier frequency of the collected data, the third processor 421 and the fourth processor 422 respectively calculate the first actual amplitude of the first spectrum line corresponding to the carrier frequency corresponding to the rail section according to the binary sequence received. Furthermore, it can be determined whether the calculation result of the first actual amplitude is correct by determining whether the first actual amplitudes respectively calculated by the third processor 421 and the fourth processor 422 are equal. When the first actual amplitudes respectively calculated by the third processor 421 and the fourth processor 422 are equal, it indicates that the calculation result of the first actual amplitude is correct.

[0100] Step 304: The signal processing module corresponding to the rail section determines whether the first actual amplitude is lower than a first preset amplitude threshold.

[0101] In the embodiment of the present invention, for each processor in the third processor 421 and the fourth processor 422, after calculating the first actual amplitude, the processor determines whether the first actual amplitude is lower than the first preset amplitude threshold. If the first actual amplitude is lower than the first preset amplitude threshold, step 305 is executed, that is, the processor determines that there is no signal with a frequency of the carrier frequency in the collected data; if the first actual amplitude is not lower than the first preset amplitude threshold, step 306 is executed, that is, the processor determines that there is a signal with a frequency of the carrier frequency in the collected data.

[0102] Step 305: If the first actual amplitude is lower than the first preset amplitude threshold, the signal processing module corresponding to the rail section determines that there is no signal with a frequency equal to the carrier frequency in the collected data.

[0103] In the embodiment of the present invention, when there is no signal with a frequency of the carrier frequency in the collected data, the corresponding signal processing module 42 can perform a preset prompt operation to prompt that the corresponding track section is occupied by a train. The preset prompt operation can be to control a preset sound alarm device to emit an alarm sound.

[0104] Step 306: If the first actual amplitude is not lower than the first preset amplitude threshold, the signal processing module corresponding to the rail section determines that a signal having a frequency equal to the carrier frequency exists in the collected data.

[0105] In the embodiment of the present invention, when there is a signal with a frequency of the carrier frequency in the collected data, it indicates that the corresponding track section is not occupied by a train.

[0106] The present invention adopts the above-mentioned technical scheme. For any rail section, the signal processing module corresponding to the rail section collects the track circuit signal of the rail section according to the preset sampling frequency within the preset time period to obtain the collected data; the track circuit signal is generated by the track circuit signal generation method of the present invention; the signal processing module corresponding to the rail section performs analog-to-digital conversion on each electrical signal in the collected data to obtain the value of each electrical signal; the signal processing module corresponding to the rail section calculates the first actual amplitude of the first spectrum line corresponding to the carrier frequency corresponding to the rail section based on the value of each electrical signal; the signal processing module corresponding to the rail section determines whether the first actual amplitude is lower than the first preset amplitude threshold; if the first actual amplitude is lower than the first preset amplitude threshold, the signal processing module corresponding to the rail section determines that there is no signal with a frequency of the carrier frequency in the collected data; if the first actual amplitude is not lower than the first preset amplitude threshold, the signal processing module corresponding to the rail section determines that there is a signal with a frequency of the carrier frequency in the collected data.

[0107] Based on this, the present invention utilizes the characteristic that the carrier frequency corresponding to each rail section is one of the eight carrier frequencies (that is, the carrier frequency corresponding to each rail section is a fixed frequency), and only analyzes the carrier frequency corresponding to the rail section. Compared with the solution in traditional technology that needs to calculate the entire spectrum, the present invention only needs to calculate the spectrum line corresponding to the carrier frequency separately, so that the present invention can reduce the amount of calculation, and thus shorten the analysis time of the track circuit signal, and improve the analysis speed of the track circuit signal.

[0108] In the embodiment of the present invention, step 303: calculating the first actual amplitude of the first spectrum line corresponding to the carrier frequency corresponding to the rail section based on the values ​​of each electrical signal may specifically include:

[0109] Based on the FFT principle, the product of the value of each electrical signal and the corresponding coefficient is summed to obtain the first actual amplitude; wherein, the coefficient corresponding to the value of any electrical signal is equal to, j is the ranking of the value of the electrical signal among the values ​​of all electrical signals, k is the value obtained by adding the quotient of the preset sampling frequency and the carrier frequency to 1, and i is an imaginary unit.

[0110] In the embodiment of the present invention, the amplitude A 0 The calculation formula is as follows:

[0111]

[0112] Among them, a j is the value of the jth electrical signal in the collected data; n is the number of electrical signals in the collected data; e -jki is the coefficient; when using formula (1) to calculate the first actual amplitude, k = (f s / f c )+1,f sis the preset sampling frequency, f c is the carrier frequency.

[0113] In the embodiment of the present invention, summing the products of the values ​​of each electrical signal and the corresponding coefficients to obtain the first actual amplitude may specifically include:

[0114] (1) For each value of the electrical signal, a target coefficient corresponding to the value of the electrical signal is obtained from a preset database.

[0115] In the embodiment of the present invention, a 1 The corresponding coefficient is e -ik , a 2 The corresponding coefficient is e -2*ik , a 3 The corresponding coefficient is e -3*ik , ..., a n The corresponding coefficient is e -nik . It can be seen that the coefficient corresponding to the value of each electrical signal is a fixed value. Therefore, the present invention pre-calculates the coefficient corresponding to the value of each electrical signal and stores it in a preset database. Then, when parsing the track circuit signal, each coefficient can be directly called from the preset database to avoid repeated coefficient calculation each time the track circuit signal is parsed. This enables the present invention to further reduce the amount of calculation when parsing the track circuit signal, thereby further shortening the parsing time and improving the parsing speed.

[0116] (2) Calculate the product of the value of the electrical signal and the target coefficient to obtain the target product.

[0117] (3) Calculate the sum of the target products corresponding to the values ​​of each electrical signal to obtain a first actual amplitude.

[0118] In the embodiment of the present invention, based on step 306, after the signal processing module corresponding to the rail section determines that there is a signal with a frequency of the carrier frequency in the collected data, the track circuit signal analysis method may further include:

[0119] (1) For each signal frequency, the signal processing module corresponding to the rail section calculates the second actual amplitude of the second spectrum line corresponding to the signal frequency and the third actual amplitude of the third spectrum line corresponding to the signal frequency based on the values ​​of each electrical signal.

[0120] In the embodiment of the present invention, for any signal frequency, the control signal corresponding to the signal frequency is f in the spectrum diagram. c ±f d There are peaks at the two locations, and the amplitudes corresponding to the two peaks are equal.

[0121] Based on this, for each of the third processor 421 and the fourth processor 422, after determining that the collected data contains a signal whose signal frequency is the carrier frequency corresponding to the rail section, the processor analyzes the signal frequency of the collected data. Specifically, for each signal frequency, based on the binary sequence it receives, the processor calculates the f of the control signal corresponding to the signal frequency in the spectrum diagram according to formula (1). c +f d The second actual amplitude at, and f c -f d The third actual amplitude at the position, wherein, when using formula (1) to calculate the second actual amplitude, k = f s / (f c +f d )+1, when using formula (1) to calculate the third actual amplitude, k=f s / (f c -f d )+1.

[0122] (2) The signal processing module corresponding to the rail section determines whether the second actual amplitude is equal to the third actual amplitude.

[0123] In an embodiment of the present invention, after the processor calculates the second actual amplitude and the third actual amplitude corresponding to the signal frequency, the processor determines whether the second actual amplitude is equal to the third actual amplitude. If the second actual amplitude is equal to the third actual amplitude, it means that the calculation result is correct. If the second actual amplitude is not equal to the third actual amplitude, it means that the calculation result is wrong.

[0124] (3) If the second actual amplitude is equal to the third actual amplitude, the signal processing module corresponding to the rail section determines whether the second actual amplitude is lower than the second preset amplitude threshold corresponding to the signal frequency.

[0125] In the embodiment of the present invention, when the processor determines that the second actual amplitude is equal to the third actual amplitude, it determines whether the second actual amplitude (or the third actual amplitude) is lower than the second preset amplitude threshold corresponding to the signal frequency. If the second actual amplitude is lower than the second preset amplitude threshold corresponding to the signal frequency, the processor executes the following step (4), i.e., determining that there is no signal with a frequency of the signal frequency in the collected data; if the second actual amplitude is not lower than the second preset amplitude threshold corresponding to the signal frequency, the processor executes the following step (5), i.e., determining that there is a signal with a frequency of the signal frequency in the collected data.

[0126] (4) If the second actual amplitude is lower than the second preset amplitude threshold, the signal processing module corresponding to the rail section determines that there is no signal with a frequency equal to the signal frequency in the collected data.

[0127] (5) If the second actual amplitude is not lower than the second preset amplitude threshold, the signal processing module corresponding to the rail section determines that a signal with a frequency equal to the signal frequency exists in the collected data.

[0128] At this point, the third processor 421 and the fourth processor 422 have completed the analysis of the collected data, and the analysis results include the existence of the carrier frequency signal corresponding to the carrier frequency of the rail section and the existence of the control signal corresponding to the 18 signal frequencies.

[0129] Next, the third processor 421 and the fourth processor 422 can respectively obtain each other's analysis results, compare the other party's analysis results with their own analysis results, and send the comparison results to each other. If the comparison results of the two processors show that the two analysis results are consistent, the third processor 421 or the fourth processor 422 can send the track circuit signal analysis result to the second train control module 41. If the comparison results of the two processors do not show that the two analysis results are consistent, the third processor 421 or the fourth processor 422 can send the track circuit signal analysis result and the comparison results of the two processors to the second train control module 41, and the second train control module 41 will report an error based on the comparison results.

[0130] In an embodiment of the present invention, the first preset amplitude threshold may be equal to a first preset percentage of the theoretical amplitude of the first spectrum line; or, the first preset amplitude threshold may be equal to a first preset percentage of the statistical amplitude of the first spectrum line when the rail section is not occupied by a train.

[0131] The second preset amplitude threshold may be equal to a second preset percentage of the theoretical amplitude of the spectrum line of the signal frequency corresponding to the second preset amplitude threshold; or, the second preset amplitude threshold may be equal to a second preset percentage of the statistical amplitude of the spectrum line of the signal frequency corresponding to the second preset amplitude threshold when the rail section is not occupied by a train.

[0132] In the embodiment of the present invention, the first preset percentage and the second preset percentage may be equal, for example, the first preset percentage and the second preset percentage are both equal to 50%.

[0133] In the embodiment of the present invention, the track circuit signal analysis method may further include: a signal processing module corresponding to the rail section generates an analysis result code.

[0134] Among them, the analysis result code includes the analysis result identifiers of the carrier frequency and each signal frequency, and the analysis result identifier includes a first identifier and a second identifier. The first identifier indicates that there is a signal with a corresponding frequency in the collected data, and the second identifier indicates that there is no signal with a corresponding frequency in the collected data.

[0135] In an embodiment of the present invention, after the third processor 421 and / or the fourth processor 422 completes the analysis of the collected data, an analysis result code can be generated according to the analysis result. In the analysis result code, a first identifier is used to indicate that there is a signal with a frequency corresponding to the frequency in the collected data, and a second identifier is used to indicate that there is no signal with a frequency corresponding to the frequency in the collected data. For example, 1 is used to indicate that there is a signal with a frequency corresponding to the frequency in the collected data, and 0 is used to indicate that there is no signal with a frequency corresponding to the frequency in the collected data. In addition, the analysis result identifiers of the carrier frequency and each signal frequency can be arranged in a preset order. For example, the analysis result identifier of the carrier frequency is ranked first, and the analysis result identifiers of the 18 signal frequencies are arranged in order from low to high frequency, starting from the second place (that is, the analysis result identifier of the signal frequency with the lowest frequency is ranked second, and the analysis result identifier of the signal frequency with the highest frequency is ranked nineteenth).

[0136] Based on this, by using a parsing result code to represent the parsing results of the carrier frequency and 18 signal frequencies, the amount of data transmitted when transmitting the track circuit signal parsing results to the second train control module 41 is reduced, as well as the amount of stored data of the track circuit signal parsing results. Moreover, the parsing result code can clearly display the parsing results of each frequency, making it convenient for users to quickly understand the parsing results of each frequency through the parsing result code.

[0137] For the above-mentioned method embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the order of the actions described, because according to the present invention, some steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

[0138] It should be noted that each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other. For the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0139] The steps in the methods of the embodiments of the present invention may be adjusted in order, combined, or deleted according to actual needs, and the technical features recorded in the embodiments may be replaced or combined.

[0140] The modules and sub-modules in the devices and terminals of the various embodiments of the present invention may be combined, divided, or deleted according to actual needs.

[0141] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0142] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A track circuit signal generation method, applied to a first track circuit signal system, wherein the first track circuit signal system comprises a first train control module and a plurality of signal generation modules corresponding to rail sections, characterized in that: The track circuit signal generation method comprises: For any of the rail sections, the first train control module sends control information to the signal generation module corresponding to the rail section; The signal generation module corresponding to the rail section determines a target signal frequency among various signal frequencies according to the control information; the number of the target signal frequency is at least one; The signal generating module corresponding to the rail section generates a track circuit signal based on the target signal frequency and the carrier frequency corresponding to the rail section; the track circuit signal is used to control the running state of the train.

2. The track circuit signal generation method according to claim 1, characterized in that: Before the first train control module sends control information to the signal generation module corresponding to the rail section, the method further includes: The first train control module generates the control information according to the rail data of the rail section; the rail data includes at least one of the rail usage status, the rail external shape and the track information within the station.

3. A track circuit signal analysis method, applied to a second track circuit signal system, wherein the second track circuit signal system comprises a plurality of signal processing modules corresponding to rail sections, characterized in that: The track circuit signal analysis method includes: For any of the rail sections, the signal processing module corresponding to the rail section collects track circuit signals of the rail section at a preset sampling frequency within a preset time period to obtain collected data; the track circuit signals are generated by the track circuit signal generation method according to any one of claims 1 to 2; The signal processing module corresponding to the rail section performs analog-to-digital conversion on each electrical signal in the collected data to obtain the value of each electrical signal; The signal processing module corresponding to the rail section calculates a first actual amplitude of a first spectrum line corresponding to the carrier frequency corresponding to the rail section based on the values ​​of each of the electrical signals; The signal processing module corresponding to the rail section determines whether the first actual amplitude is lower than a first preset amplitude threshold; If the first actual amplitude is lower than the first preset amplitude threshold, the signal processing module corresponding to the rail section determines that there is no signal with a frequency of the carrier frequency in the collected data; If the first actual amplitude is not lower than the first preset amplitude threshold, the signal processing module corresponding to the rail section determines that a signal having a frequency of the carrier frequency exists in the collected data.

4. The track circuit signal analysis method according to claim 3, characterized in that: Calculating a first actual amplitude of a first spectrum line corresponding to a carrier frequency corresponding to the rail section based on the values ​​of each of the electrical signals specifically includes: Based on the FFT principle, the product of the value of each of the electrical signals and the corresponding coefficients is summed to obtain the first actual amplitude; wherein the coefficient corresponding to any one of the values ​​of the electrical signals is equal to e -jki , j is the ranking of the value of the electrical signal among all the values ​​of the electrical signals, k is the value obtained by adding the quotient of the preset sampling frequency and the carrier frequency to 1, and i is an imaginary unit.

5. The track circuit signal analysis method according to claim 4, characterized in that: Summing the products of the values ​​of each of the electrical signals and the corresponding coefficients to obtain the first actual amplitude specifically includes: For each value of the electrical signal, obtaining a target coefficient corresponding to the value of the electrical signal from a preset database; Calculating the product of the value of the electrical signal and the target coefficient to obtain a target product; The sum of the target products corresponding to the values ​​of the electrical signals is calculated to obtain the first actual amplitude.

6. The track circuit signal analysis method according to claim 3, characterized in that: After the signal processing module corresponding to the rail section determines that there is a signal with a frequency of the carrier frequency in the collected data, the method further includes: For each signal frequency, the signal processing module corresponding to the rail section calculates, based on the values ​​of each of the electrical signals, a second actual amplitude of a second spectrum line corresponding to the signal frequency and a third actual amplitude of a third spectrum line corresponding to the signal frequency; The signal processing module corresponding to the rail section determines whether the second actual amplitude is equal to the third actual amplitude; If the second actual amplitude is equal to the third actual amplitude, the signal processing module corresponding to the rail section determines whether the second actual amplitude is lower than a second preset amplitude threshold corresponding to the signal frequency; If the second actual amplitude is lower than the second preset amplitude threshold, the signal processing module corresponding to the rail section determines that there is no signal with the frequency of the signal frequency in the collected data; If the second actual amplitude is not lower than the second preset amplitude threshold, the signal processing module corresponding to the rail section determines that a signal with a frequency of the signal frequency exists in the collected data.

7. The track circuit signal analysis method according to claim 6, characterized in that: The first preset amplitude threshold is equal to a first preset percentage of the theoretical amplitude of the first spectral line; or, The first preset amplitude threshold is equal to the first preset percentage of the statistical amplitude of the first spectrum line when the rail section is not occupied by a train; The second preset amplitude threshold is equal to a second preset percentage of the theoretical amplitude of the spectrum line of the signal frequency corresponding to the second preset amplitude threshold; or, The second preset amplitude threshold is equal to the second preset percentage of the statistical amplitude of the spectrum line of the signal frequency corresponding to the second preset amplitude threshold when the rail section is not occupied by a train.

8. The track circuit signal analysis method according to claim 6, characterized in that: Also includes: The signal processing module corresponding to the rail section generates a parsing result code; Among them, the analysis result code includes the analysis result identifiers of the carrier frequency and each of the signal frequencies, and the analysis result identifier includes a first identifier and a second identifier, the first identifier indicates that there is a signal with a frequency of the corresponding frequency in the collected data, and the second identifier indicates that there is no signal with a frequency of the corresponding frequency in the collected data.

9. A track circuit signal system, applied to the track circuit signal generation method according to any one of claims 1 to 2, characterized in that: The track circuit signal system comprises: a first train control module and a plurality of signal generation modules corresponding to the rail sections respectively; Each of the signal generating modules is respectively communicatively connected to the first train control module.

10. A track circuit signal system, characterized in that: The track circuit signal system comprises: a second train control module and signal processing modules corresponding to a plurality of rail sections respectively; Each of the signal processing modules is respectively connected in communication with the second train control module; Any one of the signal processing modules is used to adopt the track circuit signal analysis method as described in any one of claims 3 to 8 to obtain a track circuit signal analysis result, and send the track circuit signal analysis result to the second train control module.

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