CN101242194B - Digital demodulation device applied to CTCS standard point responder - Google Patents

Digital demodulation device applied to CTCS standard point responder Download PDF

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Publication number
CN101242194B
CN101242194B CN 200710035662 CN200710035662A CN101242194B CN 101242194 B CN101242194 B CN 101242194B CN 200710035662 CN200710035662 CN 200710035662 CN 200710035662 A CN200710035662 A CN 200710035662A CN 101242194 B CN101242194 B CN 101242194B
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unit
signal
main controller
digital
ctcs
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CN 200710035662
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CN101242194A (en
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任颖
吕浩炯
戴毅欣
田立新
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株洲南车时代电气股份有限公司
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Abstract

The invention discloses a digital modulating device for CTCS standard responder, comprising a main controller unit, an input signal filtering unit, a signal amplifying unit, an AD converting unit, a power supply unit and an external communication unit for filtering an input signal filtering unit with interruption noise which is orderly connected to the AD converting unit and the main controller unit via the amplifying unit. The main controller unit is to process digital filter operation to obtained digital signal to obtain real-time original signal and to process antenna malfunction and signal intensity judgment. The external communication unit is to process external electric isolation for the output signal of the main controller unit and to convert signal end signal to the difference signal so as to improve anti-interruption ability of the signal. The power supply unit is to provide various required grade voltages for other units, at the same time to judge stability of the system to generate restoring signal. The invention has simple structure, low cost, low power consumption and so on. The modulation operation is of excellent accuracy, real-time performance and safety.

Description

应用于CTCS标准点式应答器的数字解调装置 Point applied CTCS standard digital demodulating apparatus transponder

技术领域 FIELD

[0001] 本发明主要涉及到铁道机车安全设备的控制领域,特指一种应用于CTCS标准点式应答器的数字解调装置。 [0001] The present invention relates to the field of railway locomotive safety control device, in particular to a digital demodulating apparatus applied CTCS standard point of the transponder.

背景技术 Background technique

[0002] 近年来,随着列车运行速度的不断提高,运行密度的进一步加大,铁路运输对列车控制系统(ATC系统)的要求越来越高,现有设备由于技术含量低,其控制功能却未得到最佳发挥。 [0002] In recent years, with the increasing speed of trains running to further increase the density of railway transport requirements for train control system (ATC system) is getting higher and higher, existing equipment due to the low technical content, its control function but did not get the best play. 在国外的铁路运输系统中,基本上都是使用专用的地面设备向车载系统提供列车的绝对位置信息,这种设备就是点式应答器。 Absolute position information in a foreign country rail transport system, basically using a dedicated ground equipment to provide a train car system, this device is the point transponders. 欧洲的ERTMS/ETCS (欧洲铁路运输管理系统/欧洲列车控制系统)系统是目前世界上最先进、最系统的列车控制系统。 European ERTMS / ETCS (European Rail Traffic Management System / European Train Control System) system is the world's most advanced system of train control system. 铁道部门参照ETRMS/ETCS的要求已经制定了中国列车控制系统的标准(CTCS标准),在这个标准中,点式应答器识别装置(即解调装置)是系统中关键部件。 Referring to the railway sector ETRMS / ETCS requirements have developed standards of Chinese Train Control System (the CTCS standard), in this standard, transponder point identification means (i.e., demodulation means) is a key component of the system. 因为它将使列车控制系统的自动化程度进一步得到提高,也将使我国ATC系统的研制水平向更高的层次迈进。 Because it will allow automated train control system is further increased, the level of the ATC system will also enable the development of our country to a higher level. 当今数字化和软件化是控制系统的研究和发展热点方向。 Today's digital technology and software research and development focus direction control system. 与传统的模拟系统随着数字电路技术的发展,无论是工业还是民用控制系统,都在向着“数字化”的方向发展。 With traditional analog systems with the development of digital circuit technology, whether industrial or civilian control systems, both in the direction of the "digital" development. 因为与模拟信号相比,数字信号更易于检测。 As compared with the analog signal, a digital signal is more easily detected. 与模拟电路相比,数字电路抗失真和抗干扰能力强。 Compared with analog circuitry, digital circuitry, anti-aliasing and anti-jamming. 数字解调装置作为应答器系统中的核心部件之一,解调操作的准确性、实时性和安全性对应答器系统的性能有很大的影响。 Digital demodulating apparatus as one of the core components of the transponder system, the accuracy of the demodulation operation, real-time security and has a great influence on the performance of the transponder system.

发明内容 SUMMARY

[0003] 本发明要解决的问题就在于:针对现有技术存在的技术问题,本发明提供一种结构简单、成本低廉、功耗低,其解调操作具有较佳的准确性、实时性和安全性的应用于CTCS 标准点式应答器的数字解调装置。 [0003] Problems to be solved by the present invention is that: for the technical problems of the prior art, the present invention provides a simple, low cost, low power consumption, which has better accuracy demodulation operation, and real-time It is applied to a standard digital demodulating apparatus CTCS point transponder security.

[0004] 为解决上述技术问题,本发明提出的解决方案为:一种应用于CTCS标准点式应答器的数字解调装置,其特征在于:它包括主控制器单元、输入信号滤波单元、信号放大单元、 AD转换单元、电源单元和对外通讯单元,用来滤除带外干扰噪声的输入信号滤波单元依次经过信号放大单元和AD转换单元与主控制器单元相连,主控制器单元用来将得到的数字信号进行数字滤波操作得到实时的原信号,以及进行天线故障和信号强度判断,对外通讯单元用来将主控制器单元的输出信号进行对外电气隔离,并将单端信号转为差分信号以提高信号的抗干扰能力,电源单元为其他单元提供各种所需的等级电压,同时判断数字解调装置的稳定性产生复位信号。 [0004] To solve the above technical problem, the solution proposed according to the present invention are: one kind is applied to a standard digital demodulating apparatus CTCS point of the transponder, characterized in that: it comprises a main control unit, an input signal filter means, the signal It means filtering the input signal amplification unit, the AD conversion unit, a communication unit and external power supply unit for the noise band interference filter sequentially through signal amplifying unit and the AD conversion unit is connected with the main controller unit, a main unit controller for the the resulting digital signal obtained in real-time digital filtering of the original signal, and the antenna failure and the signal intensity determination, the external communication unit for the output signal of the main controller unit's external electrical isolation, and single-ended signals into differential signals to enhance its interference signal, the power supply unit provides a voltage level required by the various other units, and determines the stability of the digital demodulation means generating a reset signal.

[0005] 所述主控制器单元的输入端与一天线故障检测单元相连,天线故障检测单元用来检测天线工作是否正常,从而可以减少系统的误工作量。 The [0005] input of the master controller unit with an antenna failure detection unit connected to the antenna failure detection unit for detecting whether the antenna is working properly, thereby reducing the workload of the system error.

[0006] 所述主控制器单元的输出端与一显示单元相连,显示单元用来将主控制器单元的处理结果信息显示出来,实现人机交互。 The [0006] output of the master controller unit is connected with a display unit, the display unit displays the processing result to the information of the main controller unit, interacting with a computer.

[0007] 所述信号放大单元由以芯片AD83M为主的多级低通放大电路以及由以芯片AD812组成的四级全带通放大电路组成。 The [0007] signal amplifying unit by the chip-based AD83M multistage amplifier circuit and low-pass by the AD812 chip to four full band pass amplifier circuit composed.

[0008] 所述AD转换单元采用8bit的高速AD采样芯片AD9283。 [0008] The high-speed AD conversion unit AD9283 8bit of AD sampling chip.

[0009] 所述主控制器单元采用芯片EP2C8Q208C8N。 [0009] The main unit controller uses chip EP2C8Q208C8N.

[0010] 与现有技术相比,本发明的优点就在于: [0010] Compared with the prior art, advantages of the present invention is that:

[0011] 1、本发明应用于CTCS标准点式应答器的数字解调装置中通过数字滤波处理的方法将包含报文信息的FSK调制信号解调为实时的、准确的数字信号并输出,同时具有天线故障检测功能,同时通过显示单元实时显示该装置工作状态信息、报警显示可达到装置安全监控与保护。 [0011] 1, FSK digital demodulating apparatus demodulates the modulation signal is applied to the standard point CTCS transponder according to the invention by a method including the digital filter processing of message information in real time, accurate digital signal and output, an antenna failure detection, and the display apparatus operating status information in real time through the display unit, the alarm display device can be achieved safety monitoring and protection.

[0012] 2、本发明应用于CTCS标准点式应答器的数字解调装置主要用于机车的安全运行控制领域,所以必然要求系统在设计上采用结构简单、成本低廉和高可靠性高的设计方案, 从而保证装置的拆装方便、性能可靠得要求。 Design [0012] 2, applied to a standard point CTCS transponder digital demodulating apparatus for controlling the operation of the present invention is mainly the field of security locomotive, the system is a necessary requirement in the design of simple structure, low cost and high reliability high programs, so as to ensure easy accessibility of the apparatus, may require reliable performance.

[0013] 3、本发明应用于CTCS标准点式应答器的数字解调装置与具有同功能的模拟装置相比较,该数字装置采用数字化处理方式后具有更强的电磁抗干扰能力,同时在数据采集和处理方面具有精度更高、处理速度更快等优点。 [0013] 3, the present invention is applied to a standard CTCS point of the transponder is compared with a digital demodulating apparatus simulation apparatus having the same function, the digital post-processing apparatus using digital embodiment has stronger electromagnetic immunity, while data acquisition and processing with higher accuracy, and faster processing speed and other advantages.

[0014] 4、本发明应用于CTCS标准点式应答器的数字解调装置在器件的选型上充分的考虑到该装置所工作的环境的恶劣性,所有芯片都选择工业级的,能在_45°C至70°C范围内正常的工作。 [0014] 4, is applied to the standard point CTCS transponder digital demodulating apparatus of the present invention in the selection of the device into full consideration of the harsh operating environment of the apparatus are all industrial grade chips are selected, the can the normal operating _45 ° C to 70 ° C range.

[0015] 5、本发明应用于CTCS标准点式应答器的数字解调装置在电磁兼容方面在设计时采用模拟采样和数字处理隔离的方式,从而避免外界的干扰信号通过地等方式干扰该装置,可满足铁标关于电磁兼容性标准。 [0015] 5, applied to the standard point CTCS transponder digital demodulating apparatus of the present invention employ analog and digital processing samples isolated manner at design time in terms of electromagnetic compatibility, so as to avoid outside interference signal by the interference of the apparatus, etc. meet standard regarding electromagnetic compatibility standard iron.

[0016] 附图说明 [0016] BRIEF DESCRIPTION OF DRAWINGS

[0017] 图1是本发明的框架结构示意图; [0017] FIG. 1 is a schematic view of a frame structure according to the present invention;

[0018] 图2是本发明中天线故障检测单元的电路原理示意图; [0018] FIG. 2 is a schematic circuit diagram of the present invention, the antenna failure detection unit;

[0019] 图3是本发明中输入信号滤波单元的电路原理示意图; [0019] FIG. 3 is a schematic circuit diagram of the present invention, the input signal of the filter unit;

[0020] 图4是本发明中信号放大单元的电路原理示意图; [0020] FIG. 4 is a schematic circuit diagram of the principles of the present invention, the signal amplification unit;

[0021] 图5A是本发明主控制器单元中部分端口的示意图- [0021] FIG 5A is a partial schematic view of the port of the master controller unit of the present invention -

[0022] 图5B是本发明主控制器单元中部分端口的示意图二 [0022] FIG 5B is a partial schematic view of a port in the master controller unit of the present invention, two

[0023] 图5C是本发明主控制器单元中部分端口的示意图三 [0023] FIG 5C is a partially schematic view of a main port controller unit of the present invention, three

[0024] 图5D是本发明主控制器单元中部分端口、供电部分以及部分外围电路的示意图四; [0024] FIG. 5D is a front schematic view of the controller unit of the present invention, part of the port, and a power supply portion of the four peripheral circuit portion;

[0025] 图6是本发明中电源单元的电路原理示意图; [0025] FIG. 6 is a schematic circuit diagram of a power supply unit of the present invention;

[0026] 图7是本发明中AD转换单元的电路原理示意图; [0026] FIG. 7 is a circuit schematic of the principles of the present invention, the AD conversion unit;

[0027] 图8是本发明中对外通讯单元的电路原理示意图。 [0027] FIG. 8 is a circuit schematic of the principles of the present invention, the external communication unit.

[0028] 图例说明 [0028] Legend

[0029] 1、主控制器单元 2、输入信号滤波单元 [0029] 1, the main controller unit 2, the input signal filtering means

[0030] 3、信号放大单元 4、AD转换单元 [0030] 3, signal amplification unit 4, AD conversion unit

[0031] 5、显示单元 6、电源单元 [0031] 5, the display unit 6, the power supply unit

[0032] 7、对外通讯单元 8、天线故障检测单元 [0032] 7, the external communication unit 8, the antenna failure detection unit

[0033] 具体实施方式[0034] 以下将结合附图和具体实施例对本发明做进一步详细说明。 [0033] DETAILED DESCRIPTION [0034] Hereinafter, specific embodiments in conjunction with the accompanying drawings and described in further detail of the present invention.

[0035] 如图1所示,本发明应用于CTCS标准点式应答器的数字解调装置,它包括主控制器单元1、输入信号滤波单元2、信号放大单元3、AD转换单元4、电源单元6和对外通讯单元7,用来滤除带外干扰噪声的输入信号滤波单元2依次经过信号放大单元3和AD转换单元4 与主控制器单元1相连,主控制器单元1用来将得到的数字信号进行数字滤波操作得到实时的原信号,以及进行天线故障和信号强度判断,对外通讯单元7用来将主控制器单元1的输出信号进行对外电气隔离,并将单端信号转为差分信号以提高信号的抗干扰能力,电源单元6为其他单元提供各种所需的等级电压,同时判断系统的稳定性产生复位信号。 [0035] As shown, the present invention is applied to a standard point CTCS transponder digital demodulating apparatus shown in FIG. 1, which includes a main controller unit 1, an input signal filtering unit 2, a signal amplifying unit 3, AD conversion unit 4, a power supply input signal filter unit 6 and the external communication unit 7 unit for noise band interference filter 2 is connected sequentially via the signal amplifying unit 3, and the AD conversion unit 4 and the main controller unit 1, the main controller unit 1 is used to give digitally filtering the digital signal in real-time operation of the original signal, and an antenna failure were obtained, and the signal intensity determination, the external communication unit 7 for the output signal of the main controller unit 1 is electrically isolated from the external, and single-ended signals into differential signal to enhance its interference signal, the power supply unit 6 supplies a voltage level required by the various other units, and the stability determination system generates a reset signal. 在较佳实施例中,主控制器单元1的输入端与一天线故障检测单元8相连,天线故障检测单元8 通过天线所送出的故障信号判断天线工作状态,从而避免整个系统的误操作。 In the preferred embodiment, connected to an input terminal of the main controller unit 1 with an antenna failure detection unit 8, antenna failure detection unit 8 sent out by the antenna an antenna signal determining the failure state, thereby avoiding misuse of the system. 主控制器单元1的输出端与一显示单元5相连,显示单元5用来将主控制器单元1的处理结果信息显示出来,实现人机交互。 The output end of the main controller unit 1 is connected with a display unit 5, the display unit 5 to display the main controller unit 1 the processing result information out of interacting with a computer.

[0036] 参见图2〜图8所示为本发明的一个具体实施例。 [0036] Referring to FIG 2 ~ one particular embodiment shown in FIG. 8 of the present invention. 本实施例中,本发明通过天线采集的输入信号中心频率4. 234MHz士200KHz的2FSK信号,同时叠加了用来激活地面应答器的27. 095MHz的功率载波,报文信号中同时包含其它频率的干扰信号,这时需要对输入信号进行有效的处理才能得到地面应答器中所包含的原码信息。 In this embodiment, the present invention is the input signal center frequency acquisition through the antenna 4. 2FSK persons 200KHz signal of 234MHz, while superimposed to activate the ground transponder the power of the carrier 27. 095MHz, message signal contains frequencies other interference signal, then need to process the input signals effectively to get the original ground transponder code information included.

[0037] 如图2所示,本发明中天线故障检测单元8,其输入信号为从天线功放装置所得到的天线故障信号。 [0037] 2, 8, the input signal is an antenna failure signal obtained from the antenna device of the present invention, the amplifier antenna failure detection unit. 其结构上采用低通滤波电路,该低通滤波电路由电感、电容和光电藕合器组成。 Which employs low-pass filter circuit configuration, the low-pass filter circuit composed of inductance, capacitance and photoelectric coupling components. 输入信号经过L17和C65构成的低通滤波电路,得到直流天线故障信号(5V为正常, OV故障)。 L17 through the input signal and low pass filter circuit formed of C65, antenna failure to obtain a DC signal (5V normal, OV fault). R68限流后送到光电隔离芯片U21中。 R68 limiting to the optical isolation of chip U21. 输出信号进过R67上拉送入主控制器单元,供其判断天线的工作状态是否正常,避免将错误信息传递给下级单元。 Output signal is fed into the pull-through R67 main controller unit, for determining whether the antenna is operating normally, transmits an error message to prevent the lower unit.

[0038] 如图3所示,本发明的输入信号滤波单元2采用无源带通滤波电路,其输入信号是从4M天线上所接受到的中心频率4. 234MHz 士200KHz的2FSK信号,同时还带有其它频率噪声从P3接头输入。 [0038] As shown, the input signal of the filter unit 2 of the present invention employ a passive band-pass filter circuit 3, an input signal is received from the antenna 4M 4. 2FSK center frequency of 200KHz signal 234MHz persons, but also with other frequency noise from the input connector P3. 其结构上是由电阻、电容和电感组成的两个高通滤波电路和三个低通滤波电路组成的五级的无源带通滤波电路,作用为滤除各种带外的干扰信号,它的通带为3MHz至5MHz,对27. 095MHz频段的抑制达到_70dB,确保滤波后报文信号有20dB以上的信噪比,然后送入放大单元3。 Which is structurally five passive band-pass filter circuit of two high-pass filter circuit and the low pass filter circuit of three resistors, capacitors and inductors of the composition, acts as filter interference signals outside of the belt variety, its passband 3MHz to 5MHz, inhibition 27. 095MHz band reaches _70dB, to ensure that the filtered message has more than 20dB signal to noise ratio, and then fed to the amplifying unit 3.

[0039] 如图4所示,本发明中信号放大单元3。 As shown in [0039] FIG. 4, according to the present invention, the signal amplification unit 3. 其输入信号为通过滤波单元2后所得到的较为干净的4. 234MHz 士200KHz的2FSK信号。 2FSK signal as its input signal a cleaner 4. 234MHz persons 200KHz by post filtering unit 2 obtained. 该单元结构上是由以芯片U2 (AD8!354)为主的多级低通放大电路以及由以芯片U3、U4(AD812)组成的四级全带通放大电路组成,其放大增益为20db。 The cell structure is formed on a chip U2 (AD8! 354) based multi-stage low-pass amplifier and is amplified by four full band on to the chip U3, U4 (AD812) consisting circuit which amplifies a gain of 20db. 以运放U3、U4为例说明,因为都是采用单5V电源供电,所以输入信号必须抬高后再放大。 To operational amplifier U3, U4 as an example, since they are a single 5V supply, the input signal must be amplified and then raise. 电阻R13、R14分压,使得信号电压抬高2V,抬高后的信号输入运放反向端构成放大电路。 Resistors R13, R14 partial pressure, so that the signal to raise the voltage 2V, the signal input terminal of the operational amplifier inverted amplifying circuit constituting the elevation. 本装置中U13、14采用AD812运放芯片,根据芯片数据手册中闭环增益的数据,在27. 095MHz时的增益相对4M频段有6dB的衰减,这进一步降低的干扰信号的影响。 U13,14 using this device AD812 op-amp chip, according to the datasheet of the closed-loop gain data, the gain at relatively 4M 27. 095MHz band attenuation of 6dB, which further reduces the influence of the interference signal. 同时放大后经过量级的变压器输出给AD采样电路。 At the same time amplifies the magnitude of the output transformer to the AD sampling circuit. 通过隔离变压器P4、P5(TC4-1W)该变压器的对4M信号的衰减为0. 98db,对有效信号的影响较小。 Through the isolation transformer P4, P5 (TC4-1W) attenuate the signal transformer is a pair of 4M 0. 98db, less impact on the useful signal. 同时通过变压器可以将模拟部分和数字部分进行隔离。 While the analog and digital portions may be isolated by a transformer. 在全带通的放大电路中每级的放大增益为10db。 Full band-pass amplifier circuit in each stage amplification gain of 10db. 该单元的输出为波形完整的放大后的2FI信号,送给下级的AD转换电路4进行A/D采样。 The output unit is a complete 2FI signal amplified waveform to the AD conversion circuit 4 is lower A / D sampling.

[0040] 如图5A-5D所示,本发明中主控制器单元1,其输入信号分别来源于AD转换单元输出的8位数字A/D信号和从天线故障检测单元输出的天线故障信号。 [0040] As shown in FIG. 5A-5D, according to the present invention, the main controller unit 1, which are derived from the input signal of the AD conversion unit outputs the 8-bit digital A / D signal and the antenna signal of the antenna failure detection unit fault output from. 其结构上的主控芯片为ALTERA公司所推出的FPGA芯片EP2C8Q208C8N。 Which is the main structural chip launched by the company ALTERA FPGA chip EP2C8Q208C8N. 因为该器件具有2个独立的模拟倍频模块,系统中采用输入频率为27M通过倍频后得到810M的高速工作频率。 Since the device has two separate analog multiplier modules, the system uses the frequency of the input frequency obtained by 27M 810M of the high-speed operating frequency. EP2C8Q208C8 同时还有多个内置的乘法模块,便于HR滤波器和FFT滤波器做数字信号处理的需要。 EP2C8Q208C8 multiplication as well as a plurality of built-in module, to facilitate HR filters and FFT filters do require digital signal processing. 在EP2C8Q208C8中集成了M4K的存储技术,从而可以实现数据的深度存储。 M4K integrated in EP2C8Q208C8 storage technology, so that the depth of storing data may be implemented. 综上所述EP2C8Q208C8有利于提高整个系统的处理能力从而实现高速、实时的数字信号处理的工作。 In summary EP2C8Q208C8 help to improve the processing capacity of the entire system in order to achieve high-speed, real-time digital signal processing work is. 同时可以FPGA还可以实现天线故障信号处理、信号强度的判断、产生与数据相对齐的时钟信号、显示控制、对外传输的控制等功能。 FPGA may also be implemented while the antenna failure signal processing, the signal strength is determined, generating a clock signal aligned data, display control, transfer of external control. 该单元的输出信号为显示单元5所需的控制信号LEDDO〜LEDD7,送给如图所示的显示单元LEDl〜LED4。 An output signal of the signal unit is a control unit 5 displays the desired LEDDO~LEDD7, to the display unit shown in FIG. LEDl~LED4. 同时输出对外通讯单元7所需的DATA+IN、CLK+IN 信号。 External communication unit while the output DATA + IN 7 required, CLK + IN signal.

[0041] 如图6所示,本发明的电源单元6负责为装置提供稳定的多个需求等级的电压。 [0041] As shown in FIG 6, the power supply unit 6 is responsible for the present invention to provide a stable voltage level requirements for a plurality of devices. 其输入信号为从母板上所得到的5V直流输入。 5V DC input signal to the input obtained from the motherboard. UlO为共模抑制线圈可以达到减小从电源来的干扰和同时可以减小自身对外部电源的干扰。 UlO coil of common mode rejection can be achieved from a power source to be reduced while reducing the interference and self-interference of the external power supply. Ull(PC3-5-5)为5V转5V的电源隔离模块,从而可以得到相对独立的为数字部分供电的5V电源。 Ull (PC3-5-5) is a 5V 5V power isolation module, can be obtained relatively independently of the digital portion of a 5V supply. 为了给模拟部分电路提供相对独立的5V供电,采用了电压隔离芯片U12(DCP010505),从而达到了数字、模拟独立供电互不影响的效果。 To provide relatively independent 5V power supply to the analog part of the circuit, using a voltage isolation chip U12 (DCP010505), so as to achieve the figure, the simulation results affect each other independently powered. 因为数字部分有较为复杂的电源等级需求,U14(REF2912)、U15(UC382T)、 U16(TPS75933)分别为AD转化提供1. 25V的参考电压、FPGA所需的1. 2V电压、数字部分所需的3. 3V电压。 Part of a more complex because the digital power level requirements, U14 (REF2912), U15 (UC382T), U16 (TPS75933) each providing a reference voltage for AD conversion 1. 25V, 1. 2V voltage required FPGA, a desired portion of the digital of 3. 3V voltage. U17 (TPS3307)、U18 (TPS3123)时电源监视管理器,U17负责监视数字部分的5V和3. 3V的供电情况,当电压不稳定有所下降时U17的第5管脚产生低电平输给FPGA ;同样U18主要负责数字部分1. 2V的监视作用,同时还可以通过看门对狗管理,监视FPGA的时钟信号的稳定性。 U17 (the TPS3307), when U18 (TPS3123) A power source monitoring manager, 5V and responsible for monitoring the power supply situation U17 digital part 3. 3V when the voltage is unstable decline U17 generates a low level of loss to the fifth terminal FPGA; U18 same effect is responsible for monitoring the digital part 1. 2V, but also can monitor the stability of the clock signal to the FPGA dog managed by gatekeepers. 该单元的输出为数字部分主控制器单元1、显示单元5、对外通讯单元7、 AD转换单元4所需的D5V、1. 2V、3. 3V、VCCPLLA、VCCPLLB和AD转换的参考电压REV。 The output of the digital portion of the main unit is a controller unit, a display unit 5, the external communication unit 7, D5V 4 required for the AD conversion unit, 1. 2V, 3. 3V, VCCPLLA, VCCPLLB AD conversion reference voltage and REV. 同时还有输出给主控制器单元的判断D5V、3. 3V电源是否稳定信号RESETA (当D5V和3. 3V不稳定时RESETA信号将会被拉低,正常时输出高电平),判断1. 2V电源是否稳定信号RESETB (当1. 2V不稳定时RESETB信号将会被拉低,正常时输出高电平),和判断主控制器单元时钟是否稳定的WDI信号(当主控制器单元没有对)。 As well as output to the main controller unit determines D5V, 3. 3V power source is stable signal RESETA (when D5V signal RESETA and 3. 3V instability will be pulled low, normal output high), a determination. 2V power supply is stable RESETB signal (2V 1. when the signal RESETB is unstable will be pulled low, normal output high), and the main controller unit WDI clock signal determining whether the stable (when no master controller unit) .

[0042] 如图7所示,本发明中的AD转换电路4,该单元的输入信号为上级防大单元3的输出的放大后的2FSK信号。 [0042] As shown in FIG 7, in the present invention, the AD conversion circuit 4, the input signal for the parent unit preventing the large unit 2FSK amplified output signal 3. 该单元结构上采用的是Sbit的高速AD采样芯片AD9283,通过芯片资料最高的采样频率可以达到100MSPS。 Using the configuration of the unit is a high-speed AD sampling chip AD9283 Sbit by chip information can reach the highest sampling frequency 100MSPS. 因为最高的有效频率为4. 5M—般在一个波形周期内采样5个点以上就可以反映出一个周期的波形变化,所以选取的采样频率为45MSPS, AD采样后直接将8位输出AD0-AD8传给主控芯片FPGA级主控制器单元1供其进行数据处理。 Since the most effective sampling frequency is 4. 5M- as five or more points can reflect a change in the waveform in one cycle of the waveform cycle, the sampling frequency is selected 45MSPS, AD directly sampled 8-bit output AD0-AD8 FPGA passed to the master chip 1 for class main controller unit which performs data processing.

[0043] 如图8所示,本发明中对外通讯单元7,其输入信号为从主控制器单元出来的DATA+IN、CLK+IN信号。 [0043] As shown in FIG. 8, the present invention, the external communication unit 7, which is an input signal from the main controller unit out of the DATA + IN, CLK + IN signal. 其结构上采用的U19、U20位数字磁隔离器件ADUMl 100,从而达到了使主控制器与外部的通讯向隔离的效果。 Which employs structurally U19, U20-bit digital magnetic separator device ADUMl 100, so as to achieve the main controller and the external communication to the spacer effect. 从主控制器单元过来的DATA+和CLK+信号通过隔离后输给485通讯总线管理器输出两路独立的差分信号,从而具有良好的稳定性和抗干扰性。 Coming from the main controller unit and CLK + DATA + signal through the isolation loss bus manager 485 outputs two separate differential signal, so as to have good stability and anti-jamming. 输出地面应答器装置的原码信号送给下级的解码装置进行处理。 Output Ground transponder device to the original code signal decoding apparatus for processing lower.

Claims (6)

1. 一种应用于CTCS标准点式应答器的数字解调装置,其特征在于:它包括主控制器单元(1)、输入信号滤波单元O)、信号放大单元(3)、AD转换单元0)、电源单元(6)和对外通讯单元(7),用来滤除带外干扰噪声的输入信号滤波单元(¾依次经过信号放大单元(3) 和AD转换单元(4)与主控制器单元(1)相连,主控制器单元(1)用来将得到的数字信号进行数字滤波操作得到实时的原信号,以及进行天线故障和信号强度判断,对外通讯单元(7) 用来将主控制器单元(1)的输出信号进行对外电气隔离,并将单端信号转为差分信号以提高信号的抗干扰能力,电源单元(6)为其他单元提供各种所需的等级电压,同时判断数字解调装置的稳定性产生复位信号。 An applied CTCS standard point of the transponder digital demodulating apparatus, characterized in that: it comprises a main controller unit (1), the input signal filtering means O), the signal amplification unit (3), AD conversion unit 0 (input signal filter unit 6) and external communication means (7) for the noise band interference filter (¾ sequentially via the signal amplification unit (3)), the power supply unit and the AD conversion unit (4) and the main controller unit (1) is connected to the main controller unit (1) for the digital signal will be obtained in real time digital filtering operation of the original signal, and the antenna failure and the signal intensity determination, the external communication unit (7) for the master controller output signal unit (1) is electrically isolated from the outside, and the single-ended signals into differential signals in order to improve anti-jamming capability, power supply unit (6) signal to provide a voltage level required by the various other means, while determines a digital solution stability of the adjusting means generates a reset signal.
2.根据权利要求1所述的应用于CTCS标准点式应答器的数字解调装置,其特征在于: 所述主控制器单元(1)的输入端与一天线故障检测单元(8)相连,天线故障检测单元(8) 用来判断天线是否正常工作。 The digital demodulating apparatus is applied to a standard point CTCS transponder according to claim 1, wherein: the main controller is connected to unit (1) and the input terminal of an antenna failure detection unit (8), antenna failure detection unit (8) is used to determine the antenna is working properly.
3.根据权利要求1或2所述的应用于CTCS标准点式应答器的数字解调装置,其特征在于:所述主控制器单元(1)的输出端与一显示单元(¾相连,显示单元(¾用来将主控制器单元(1)的处理结果信息显示出来,实现人机交互。 The digital demodulation apparatus is applied to a standard point CTCS transponder of claim 1 or claim 2, wherein: an output of the main controller unit (1) is connected with a display unit (¾, display means (¾ to the main controller unit (1) displays information processing result, interacting with a computer.
4.根据权利要求3所述的应用于CTCS标准点式应答器的数字解调装置,其特征在于: 所述信号放大单元(3)由以芯片AD83M为主的多级低通放大电路以及由以芯片AD812组成的四级全带通放大电路组成。 The digital demodulating apparatus is applied to a standard point CTCS transponder according to claim 3, wherein: said signal amplification means (3) consists of a chip-based AD83M multistage amplifier circuit and a low-pass AD812 chip to the whole composition of the four band-pass amplifier circuit.
5.根据权利要求4所述的应用于CTCS标准点式应答器的数字解调装置,其特征在于: 所述AD转换单元(4)采用Sbit的高速AD采样芯片AD9283。 The digital demodulating apparatus is applied to a standard point CTCS transponder according to claim 4, wherein: the AD conversion unit (4) using the high-speed AD sampling chip AD9283 Sbit of.
6.根据权利要求5所述的应用于CTCS标准点式应答器的数字解调装置,其特征在于: 所述主控制器单元(1)采用芯片EP2C8Q208C8N。 The digital demodulation apparatus is applied to a standard point CTCS transponder according to claim 5, wherein: the main controller unit (1) using the chip EP2C8Q208C8N.
CN 200710035662 2007-08-30 2007-08-30 Digital demodulation device applied to CTCS standard point responder CN101242194B (en)

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