CN102778872B - Real-time correction method for dynamic displacement of track circuit reader signal carrier frequency - Google Patents

Real-time correction method for dynamic displacement of track circuit reader signal carrier frequency Download PDF

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CN102778872B
CN102778872B CN 201210232135 CN201210232135A CN102778872B CN 102778872 B CN102778872 B CN 102778872B CN 201210232135 CN201210232135 CN 201210232135 CN 201210232135 A CN201210232135 A CN 201210232135A CN 102778872 B CN102778872 B CN 102778872B
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carrier frequency
track circuit
train
reader
calculating
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CN102778872A (en
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赵林海
许俊杰
张才林
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北京交通大学
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Abstract

本发明涉及一种轨道电路读取器信号载频动态偏移的实时修正方法,属于铁路领域,用于解决轨道电路读取器信号载频发生动态偏移的问题。 The present invention relates to a method for real-time correction reader signal carrier frequency dynamic offset circuit for a rail, belonging to the field of railways, for solving the problem of dynamic offset track circuit carrier frequency of the reader signal occurs. 所述方法包括:获得轨道电路信号载频标准值fc;计算轨道电路中的补偿电容阻抗;获得列车等效分路电阻Rf;计算载频偏移因子β;获得列车运行速度vs;计算在该运行速度下的轨道电路读取器信号载频的动态偏移Δfc;轨道电路读取器计算其接收信号的频谱,并根据动态偏移Δfc的计算结果,将频谱整体向零频方向搬移Δfc,即将频谱中的载频频率f'c减去动态偏移Δfc,从而实现相应的修正过程。 The method comprising: obtaining a track circuit signal carrier frequency FC standard values; calculating the impedance of the track circuit compensation capacitor; obtaining equivalent shunt resistor Rf train; calculating a carrier frequency offset factor β; obtaining the train speed VS; calculating the dynamic offset Δfc reader signal track circuit carrier frequency at the operating speed; track circuit which receives the reader signal spectrum is calculated, and the calculation results of the dynamic offset Δfc, the whole spectrum at zero frequency Δfc moving direction, upcoming spectrum of carrier frequency f'c minus the dynamic offset Δfc, in order to achieve the appropriate correction process. 该修正方法所需信息都直接来自铁路现场设备,可直接集成至轨道电路读取器设备,以提高列车高速运行过程中,对列车目标速度信息提取的可靠性和准确性。 The required correction method information directly from the railway field devices, can be directly integrated circuit reader device to the rail, to improve process operation in high-speed train, the train of the extracted target speed information, the reliability and accuracy.

Description

轨道电路读取器信号载频动态偏移的实时修正方法 Track circuit signal carrier frequency of the reader in real-time dynamic offset correction method of

技术领域 FIELD

[0001] 本发明关于铁路领域,涉及的是一种修正方法,特别是指一种轨道电路读取器信号载频动态偏移的实时修正方法。 [0001] The present invention relates to the field of railways, relates to a correction method, and particularly to real-time dynamic offset correction method of reading a track circuit signal carrier frequency.

技术背景 technical background

[0002]列车运行控制系统(简称:列控系统)作为保障行车安全的重要设备,在铁路,尤其是高速铁路的列车速度控制方面发挥着至关重要的作用。 [0002] Train Control System (abbreviation: Train Control System) as an important device to protect traffic safety, railway, especially high-speed railway train speed control plays a crucial role. 轨道电路读取器作为该系统的关键设备之一,通过与地面轨道电路进行电磁感应形成相应的轨道电路读取器信号,再利用相应算法提取该信号中所包含的列车运行前方的目标速度信息,并进一步将其作为控制列车运行速度的依据传送给列控系统主机。 Track circuit as a key reader device of the system, to form the corresponding track circuit reader signal by electromagnetic induction ground track circuit, and then use algorithms to extract the corresponding target speed information of the train running in front of the signal contained in and further transmits it to the host as a basis for train control system controls the train speed. 由此可见,轨道电路读取器信号的生成质量和变化规律对于保障列控系统的正常工作以及列车的安全运行是十分重要的。 Thus, the build quality and variation reader signal of track circuit protection for the safe operation of the train control system is working properly and the train is very important.

[0003] 轨道电路读取器信号是一种相位连续的频移键控信号,其信号特征主要包括:载频、调制低频、初始相位和振幅等。 [0003] The reader track circuit signal is a continuous phase frequency shift keying signal, which includes a signal wherein: the carrier frequency, low frequency modulation, amplitude, and initial phase and the like. 其中,尽管只要求调制低频与列车运行前方目标速度信息相对应,但载频和振幅等特征信息也是信息提取过程的必要信息。 Wherein the low frequency modulation although only requires the front train corresponding to the target speed information, the carrier frequency and amplitude characteristics such information is necessary information extraction process. 申请人在其研究工作中发现,由于轨道电路读取器信号的采样频率固定不变,使得各采样点数据所对应的列车在轨道上的位移增量,会随列车速度的变化而改变,而这一变化最终会造成轨道电路读取器信号载频产生定量偏移,且速度越快,该动态偏移量越大。 Applicant has found in his research work, since the sampling frequency of the reader signal is fixed track circuit, so that the displacement of each sample point increment data corresponding to the train on a track, changes in response to changes in train speed, and this change will eventually result in the reader signal track circuit carrier frequency offset generating quantitative, and the faster the larger the dynamic offset. 因此,在列车高速运行的过程中,有可能会造成相应的载频频率偏移出其正常的指标范围,而最终影响对列车运行前方目标速度信息的提取。 Thus, during high-speed running train, it may cause the corresponding carrier frequency offset its normal range of indicators, and ultimately affect the extracted information to a train ahead the target speed.

[0004] 由此可知,需要对列车运行过程中轨道电路读取器信号载频所发生的动态偏移进行实时修正,而目前还没有相应的研究成果或解决办法。 [0004] It can be seen, the need for dynamic offset while the train track circuit carrier frequency of the reader signal occurring in real-time correction, while there is no corresponding solutions or research. 因此,为保证轨道电路读取器对列车运行目标速度信息的准确提取,迫切需要一种能够直接计算获得轨道电路读取器信号的载频偏移,并对该信号载频做出相应实时修正的方法。 Therefore, to ensure accurate track circuit reader extraction train target speed information, urgent need for a track circuit can be directly obtained by calculation of the reader signal carrier frequency offset, and make the appropriate correction to the real-time signal carrier frequency Methods. 这对于保障铁路,尤其是高速铁路的行车安全具有非常重要的现实意义。 This is for the protection of the railway, especially high-speed railway traffic safety has a very important practical significance.

发明内容 SUMMARY

[0005] 为解决上述轨道电路读取器信号载频发生动态偏移问题,提高列车高速运行过程中,对列车目标速度信息提取的可靠性和准确性,本发明提供一种轨道电路读取器信号载频动态偏移的实时修正方法。 [0005] Dynamic carrier frequency offset problem occurs to solve the above track circuit reader signal, to improve the reliability and accuracy of operation during the high-speed train, the train speed extraction target information, the present invention provides a track circuit reader the method of real time dynamic offset correction signal carrier frequency.

[0006] 为实现上述目的,本发明采用下述技术方案: [0006] To achieve the above object, the present invention adopts the following technical scheme:

[0007] —种轨道电路读取器信号载频动态偏移的实时修正方法, [0007] - real-time correction method kinds track circuit signal carrier frequency of the reader of the dynamic offset,

[0008] 获得轨道电路信号载频标准值fc ; [0008] obtaining the track circuit signal carrier frequency FC standard value;

[0009] 计算轨道电路中的补偿电容阻抗4 ; [0009] The compensation capacitor of the impedance trajectory calculation circuit 4;

[0010] 获得列车等效分路电阻Rf ; [0010] Equivalent train shunt resistance is obtained an Rf;

[0011] 计算载频偏移因子β ; [0011] calculating a carrier frequency offset factor beta];

[0012] 获得列车运行速度vs;[0013] 计算在该运行速度下的轨道电路读取器信号载频的动态偏移Λ fc ; [0012] obtaining the train speed vs; dynamic offset [0013] In calculating the operating speed of the track circuit signal carrier frequency of the reader Λ fc;

[0014] 轨道电路读取器计算其接收信号的频谱,并根据动态偏移Af。 [0014] The track circuit which receives the reader signal spectrum is calculated, and the dynamic offset Af. 的计算结果,将频谱整体向零频方向搬移Λ f。 The calculation results, the frequency spectrum of the overall direction of moving towards zero Λ f. ,即将频谱中的载频频率f丨。 Upcoming spectrum of carrier frequency f Shu. 减去动态偏移Λ f。 Subtracting the dynamic offset Λ f. ,从而实现相应的修正过程。 In order to achieve a corresponding correction process.

[0015] 本发明具有如下有益效果: [0015] The present invention has the following advantages:

[0016] 1.该修正方法所需信息都直接来自铁路现场设备,如速度传感器(列车速度)、轨道电路读取器(轨道电路信号载频的标准值),以及相应规定的系统使用条件(补偿电容容值、单位长度的钢轨阻抗和道砟电阻、列车等效分路电阻)。 Desired [0016] 1. The method of the correction information directly from the railway field device such as a speed sensor (train speed), track circuit reader (standard values ​​of the track circuit carrier frequency signal), and the corresponding predetermined system conditions ( the compensation value of the capacitor, the impedance per unit length of the rail and ballast resistors, the train shunt resistor equivalent). 因此,无需进行现场实地测量即可实现对轨道电路读取器信号载频动态偏移的实时修正; Thus, no need for field measurements can be realized in the field of the reader signal track circuit carrier frequency offset in real-time dynamic correction;

[0017] 2.该修正方法充分考虑到列车运行速度、线路参数和机车参数等多因素对轨道电路读取器信号载频的影响,准确度较高。 Multivariate [0017] 2. The method fully into account the correction train speed, line parameters and locomotive parameters affect the reader track circuit signal carrier frequency for high degree of accuracy.

具体实施方式 Detailed ways

[0018] 下面将对本发明所述的轨道电路读取器信号载频动态偏移的实时修正方法做进一步说明: [0018] Next, the reader will track circuit signal carrier frequency of the present invention, real-time dynamic offset correction method of further explanation:

[0019] 第I步:根据列车运行方向和轨道电路读取器对所接收信号载频的初步估计,可以确定信号载频的标准值f。 [0019] Step I: The train running direction track circuits and the reader a preliminary estimate of the received signal carrier frequency, the carrier frequency signal may be determined standard value f. ;

[0020] 第2步:根据列车运行线路的轨道电路设计文件,获得单位长度的钢轨阻抗^、道石乍电阻rd,以及补偿电容容值c,并计算补偿电容阻抗=H(IwfcC); [0020] Step 2: The train track circuit design file lines obtained per unit length of rail impedance ^, at first resistor RD ballast stones, and a compensation value of the capacitor C, and calculates the compensation capacitive impedance = H (IwfcC);

[0021] 第3步:根据轨道电路所规定的机车最大等效分路电阻条件,确定列车等效分路电阻Rf ; [0021] Step 3: The locomotive maximum equivalent shunt resistance conditions prescribed track circuit, the train determines an Rf equivalent shunt resistance;

[0022] 第4步:计算载频偏移因子 [0022] Step 4: calculating a carrier frequency offset factor

Figure CN102778872BD00041

[0023]其中, [0023] wherein,

Figure CN102778872BD00042

f = s^, Zil=JIJya,It为轨道上两补偿电容的间距,Im©为对复数取虚部操作,CA»和*©分别代表双曲余弦和双曲正弦操作; f = s ^, Zil = JIJya, It is the track pitch in two compensation capacitors, Im © taken for the imaginary part of the complex operation, CA »* © and represent cosh and sinh operation;

[0024] 第5步:由列车速度传感器实时获得列车当前运行速度Vs ; [0024] Step 5: The speed of the train running speed Vs of the current sensor obtains the train in real time;

[0025] 第6步:根据公式Λί;=βν8/2π计算出列车以速度Vs运动情况下的轨道电路读取器信号载频的动态偏移Af。 [0025] Step 6: The formula Λί; = βν8 / 2π calculate the dynamic offset Af train track circuit to the reader at the speed Vs of the movement of the carrier frequency signal. ;

[0026] 第7步:将频谱整体向零频方向搬移Λ f。 [0026] Step 7: The entire spectrum move towards zero frequency direction Λ f. ,即将频谱中的载频频率f丨。 Upcoming spectrum of carrier frequency f Shu. 减去动态偏移Λ f。 Subtracting the dynamic offset Λ f. ,从而实现相应的修正过程。 In order to achieve a corresponding correction process.

[0027] 具体地,下文将结合本发明的优选实施例对本发明的实施步骤进行详细说明。 [0027] Specifically, the following in connection with preferred embodiments of the present invention, embodiments of the present invention, the step will be described in detail.

[0028] 需要明白,下文的描述仅仅是实例性质的,而非对本发明的限制性描述。 [0028] need to understand, the following description are merely examples in nature, and not restrictive of the present invention is described. 在以下描述中可能会涉及具体数字,然而也需要明白的是,这些数字也仅仅是实例性质的,本领域技术人员可参照本发明内容,针对不同铁路线路上的轨道电路选取适当的数字进行计算。 In the following description may be directed to a specific number, but also to be understood that these figures are merely examples in nature, those skilled in the art can refer to the present invention, by selecting the appropriate numbers computed for the track circuit on a different rail lines .

[0029] 以列车在京-津城际高速铁路某段轨道电路上运行时实际所获得的轨道电路读取器信号为例,该信号经相应分析得知,其载频频率为2601.55Hz。 [0029] In a train in Beijing - Castle intercity high-speed railway track circuit when a certain operation on the obtained actual track circuit signal reader as an example, the signal corresponding to that analysis, which was the carrier frequency 2601.55Hz. [0030] 接下来,以此轨道电路和列车运行情况为条件,按本发明对轨道电路读取器信号载频的偏移进行修正,其过程如下: [0030] Subsequently, this track circuit and the train operation condition, according to the present invention, the offset track circuit signal carrier frequency of the reader is corrected, the process is as follows:

[0031] 第I步:由轨道电路读取器的载频估计功能,获得该信号的载频为2600-1型,即轨道电路信号载频标准值fe=2601.40Hz ; [0031] Step I: the reader by the track circuit carrier frequency estimation function, obtains the carrier frequency signal 2600-1 type, i.e., the track circuit signal carrier frequency of a standard value fe = 2601.40Hz;

[0032] 第2步:根据京-津城际轨道电路的线路设计文件,取单位长度的钢轨阻抗和道砟电阻分别为^ =(1.679+ 21.2161)*10 3SlZkm、rd=6.15 Ω km,以及补偿电容容值c=25 μ f,并计算 [0032] Step 2: The Beijing - Inter Castle circuit design file track circuit, the rails take the impedance per unit length, respectively, and a ballast resistor (1.679+ 21.2161) * 10 3SlZkm is ^ =, rd = 6.15 Ω km, and the compensation value of the capacitor c = 25 μ f, and calculates

补偿电容阻抗Wt.c) = -2.447ί ; Compensating capacitive impedance Wt.c) = -2.447ί;

[0033] 第3步:根据轨道电路所规定的机车最大分路电阻条件,这里取列车等效分路电阻Rf=0.25 Ω ; [0033] Step 3: The maximum engine conditions specified in the shunt resistor track circuit, where the train takes the equivalent shunt resistance Rf = 0.25 Ω;

[0034] 第4步:计算载频偏移因子= HZ1 + ^fX)) = 0,01 ; [0034] Step 4: calculating a carrier frequency offset factor = HZ1 + ^ fX)) = 0,01;

[0035] 第5步:由列车速度传感器测定运行速度vs=340km/h,折合为Vs= (340/3.6) m/s ; [0035] Step 5: train speed determined by the speed sensor vs = 340km / h, equivalent to Vs = (340 / 3.6) m / s;

[0036] 第6步:根据公式Λ fc=^vs/2 π,计算得到当时轨道电路读取器信号载频偏移Δ fc=0.01*340/3.6/2 π =0.15Hz ; [0036] Step 6: Λ fc according to the formula = ^ vs / 2 π, was calculated to give the reader track circuit signal carrier frequency offset Δ fc = 0.01 * 340 / 3.6 / 2 π = 0.15Hz;

[0037] 第7步:根据计算所得的轨道电路读取器信号载频偏移Λ fc=0.15Hz,对轨道电路读取器信号的频谱整体做出修正,即向零频方向搬移0.15Hz。 [0037] Step 7: According to the calculated read track circuit signal carrier frequency offset Λ fc = 0.15Hz, read the entire spectrum of the track circuit signal to make the correction, namely zero frequency direction moving 0.15Hz. 信号载频也由搬移前的实测频率2601.55Hz,变为修正后的标准载频2601.55Hz_0.15Hz=2601.4Hz。 Frequency signal from the carrier frequency is also measured before moving 2601.55Hz, the standard carrier frequency correction becomes 2601.55Hz_0.15Hz = 2601.4Hz.

[0038] 以上所述仅为本发明的优选实施例,并不用于限制本发明,显然,本领域的技术人员可以对本发明进行各种改动和变形而不脱离本发明的精神和范围。 [0038] The above are only preferred embodiments of the present invention is not intended to limit the present invention, be apparent to those skilled in the art may make various modifications and variations to the invention without departing from the spirit and scope of the invention. 这样,倘若本发明的这些修改和变形属于本发明权利要求及其等同技术的范围之内,则本发明也意图包含这些改动和变形在内。 Thus, if these modifications and variations of the invention as claimed in the present invention belong within the scope of the claims and their equivalents thereof, the present invention intends to include these changes and modifications included.

Claims (1)

1.一种轨道电路读取器信号载频动态偏移的实时修正方法,其特征在于,所述方法包括:获得轨道电路信号载频标准值f。 A track circuit signal carrier frequency of the reader in real-time dynamic offset correction method, characterized in that, said method comprising: obtaining a track circuit signal carrier frequency reference value f. ; 计算轨道电路中的补偿电容阻抗:¾,=其中所述计算轨道电路中的补偿电容阻抗的方法具体为,获得补偿电容容值C,根据轨道电路信号载频标准值fc与补偿电容容值C,按照公式I=棒m计算补偿电容阻抗I.获得列车等效分路电阻Rf ; 计算载频偏移因子β ;其中所述计算载频偏移因子的方法具体为,获得轨道电路单位长度的钢轨阻抗I和道砟电阻rd,根据公式β = Im(In(Zl+>/II:))计算载频偏移因子β,其中Z1 =Ch^J +Zrsh{yl,)/(2ZCI>) , Z2 = t.sMfl:) + (ZjY.sh2(fltβ)/Ζψ、 Z3 =sh(fl,)/Zd + ch^jljl)/ϊ:ρ , f = It为轨道上两补偿电容的间距,Im(.)为对复数取虚部操作,ch(.)和sh(.)分别代表双曲余弦和双曲正弦操作; 获得列车运行速度Vs ; 计算在该运行速度下的轨道电路读取器信号载频的动态偏移Λ f。 ; Track circuit compensation capacitor in the impedance calculation: ¾, = wherein the method of calculating the compensation capacitive impedance of a track circuit is specifically to obtain a compensation capacitor capacitance Found C, the track circuit signal carrier frequency fc and a standard value according to the compensation value of the capacitor C, according to the equation I = m calculating a compensation rod I. obtain equivalent capacitive impedance shunt resistor Rf train; calculating a carrier frequency offset factor β; method wherein the carrier frequency offset factor is calculated specifically, track circuit unit length is obtained rail and ballast impedance I resistor rd, according to the formula β = Im (in (Zl +> / II :)) calculating a carrier frequency offset factor β, wherein Z1 = Ch ^ J + Zrsh {yl,) / (2ZCI>) , Z2 = t.sMfl :) + (ZjY.sh2 (fltβ) / Ζψ, Z3 = sh (fl,) / Zd + ch ^ jljl) / ϊ: ρ, f = It is the track pitch of two compensation capacitor, (.) for the IM taking the imaginary part of the complex operation, ch and sh represent operations cosh and sinh (.) (.); obtaining the train speed Vs; track circuit calculating the reader at the running speed dynamic offset signal carrier frequency Λ f. ;其中所述计算轨道电路读取器信号载频的动态偏移Λ f。 ; Wherein the calculating the dynamic offset track circuit signal carrier frequency of the reader Λ f. 的方法具体为,根据公式Λ fc=^vs/2 π计算出列车以速度Vs运动情况下的轨道电路读取器信号载频的动态偏移Λ fc ; 轨道电路读取器计算其接收信号的频谱,并根据动态偏移Λ fc的计算结果,将频谱整体向零频方向搬移Λ f。 The method is particularly, Λ fc according to the formula = ^ vs / 2 π calculate the dynamic offset to the train track circuit the reader at the speed Vs of the movement of the carrier frequency signal Λ fc; track circuit calculates a reader that receives the signal spectrum, according to the calculation result fc Lambda dynamic offset will move to the zero frequency spectral overall direction Λ f. ,即将频谱中的载频频率f。 Upcoming spectrum of carrier frequency f. '减去动态偏移Λ f。 'Minus the dynamic offset Λ f. ,从而实现相应的修正过程。 In order to achieve a corresponding correction process.
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