Indusi track balise apparatus

Abstract

The present invention relates to an Indusi track balise apparatus. The Indusi track balise apparatus comprises a balise main body, which balise main body comprises a tuning module and a winding inductor, wherein the tuning module comprises signal compensation resistors of a plurality of different frequencies for attenuating the strength of signals, and a tuning capacitor PCB for matching the winding inductor to form an LC resonant circuit of a particular frequency; and the balise main body is provided with a looseness early-warning apparatus for detecting whether the balise main body is loose. The present invention can realize ground devices of a complete Indusi system, and can adapt to PZB vehicle-mounted devices with resonant frequencies of 500 Hz, 1000 Hz and 2000 Hz; and the present invention also has the function of detecting whether a track balise is loose or detached from a steel rail, and can give an alarm to maintenance personnel in the environment of long-time running trains.

Description

An Indusi track transponder device Technical Field

[0001] The present invention belongs to the technical field of track equipment, and in particular relates to an Indusi track transponder device. Background Art

[0002] The Indusi system (Point-Based Train Control System) consists of the Indusi onboard host device, the Indusi onboard antenna (hereinafter referred to as LGP), and the Indusi wayside equipment. The Point-Based Train Control System collects information from the onboard antenna and speed transmitters to monitor and prevent overspeeding after a train passes designated points on the line (where track magnets are installed), depending on the vehicle type. It also monitors and prevents overspeeding at the maximum permissible speed outside of designated points.

[0003] The current product's application interface must comply with Germany's published PZB technical specifications. This system cannot fully implement the Indusi system's ground equipment and cannot simultaneously adapt to PZB onboard equipment with resonant frequencies of 500Hz, 1000Hz, and 2000Hz. Furthermore, the Indusi rail balise is installed on the rails, where vibration can easily loosen or even cause it to fall off, making it impossible to determine its installation status.

[0004] Summary of the Invention

[0005] The object of the present invention is to provide an Indusi track transponder device in order to solve the above problems.

[0006] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0007] An Indusi rail transponder device includes a transponder body, the transponder body including a tuning module and a winding inductor, the tuning module including signal compensation resistors of multiple frequencies for attenuating signal strength, and a tuning capacitor PCB for matching the winding inductor to form an LC resonant circuit of a specific frequency;

[0008] The transponder body is provided with a loosening warning device for detecting whether the transponder body is loose.

[0009] As a further optimization scheme of the present invention, the signal compensation resistors of multiple different frequencies include 500Hz signal compensation resistors, 1000Hz signal compensation resistors and 2000Hz signal compensation resistors, which respectively have 500Hz resonance function, 1000Hz resonance function and 2000Hz resonance function with the PZB vehicle antenna.

[0010] As a further optimization solution of the present invention, the winding inductor includes a magnetic rod and a winding. The winding is a non-metallic molded part, which is sleeved on the magnetic rod and is wound with enameled wire on the outside.

[0011] As a further optimization solution of the present invention, the loosening warning device includes a vibration sensor, a CPU and an acquisition circuit, a signal isolation circuit for signal isolation, and a battery for power supply;

[0012] The vibration sensor is used to collect vibration signals, convert the vibration signals into voltage signals and transmit them to the CPU and the collection circuit;

[0013] The CPU and the acquisition circuit are used to make a determination based on the voltage signal and obtain a determination result, and output the determination result to the signal isolation circuit according to high and low levels.

[0014] As a further optimization solution of the present invention, the CPU and acquisition circuit include an A / D acquisition module, a filtering module, an FFT frequency domain calculation module, an FFT result complex modulus calculation module, an energy calculation module and a threshold judgment module;

[0015] The A / D acquisition module is used to sample signals within a preset frequency range;

[0016] The filtering module is used to filter out interference frequencies other than the rail vibration characteristic frequency;

[0017] The FFT frequency domain calculation module is used to perform FFT Fourier transform calculation on the filtered data and output the complex components of each frequency point between 0 Hz and the sampling rate. The formula is: Z(n)=X(n)+j·Y(n);

[0018] Where n represents the frequency point number, Z(n) represents the signal component at the frequency point, X(n) represents the real part of the signal component at the frequency point, and Y(n) represents the imaginary part of the signal component at the frequency point.

[0019] The FFT result complex modulus calculation module is used to perform modulus calculation on the output result of the FFT frequency domain calculation module. The formula is as follows:

[0020] The energy calculation module is used to calculate the average and maximum value of the point modulus values ​​output by the FFT result complex modulus calculation module within the frequency range of rail vibration;

[0021] The threshold judgment module is used to judge whether the transponder body is loose based on the average value and the maximum value.

[0022] As a further optimization solution of the present invention, the specific process of the value judgment module for judging whether the transponder body is loose based on the average value and the maximum value is as follows:

[0023] Set the average threshold and peak threshold;

[0024] Determine whether the average value of the modulus value is greater than the average value threshold;

[0025] Determine whether the maximum value of the modulus is greater than the peak threshold;

[0026] Counting whether the number of points within the frequency range of rail vibration whose modulus values ​​are greater than the average value threshold is greater than 1 / 20 of the total number of points within the frequency range of rail vibration;

[0027] If the first three conditions are met for one second continuously, it is considered that the received vibration signal is normal, that is, it is determined that the transponder body is not loosely installed; otherwise, it is determined that the transponder body is loosely installed.

[0028] As a further optimization solution of the present invention, the transponder body includes a main shell, a bracket is provided on the main shell, a bottom mounting frame is provided on the bracket, and the bottom mounting frame is installed on the rail; protective plates are provided on both sides of the transponder body, and the protective plates are installed on the rail.

[0029] As a further optimization solution of the present invention, the transponder body is respectively provided with a main cavity for placing the magnetic rod, a first side cavity for placing the tuning capacitor PCB, a terminal for installing the cable, and a second side cavity for testing; the main cavity and the first side cavity are potted with potting glue.

[0030] As a further optimization scheme of the present invention, it also includes a cable assembly and a signal switching device relay, the cable assembly includes a cable protector, a cable and a junction box installed on the transponder body, the junction box is used to connect the cable assembly between the signal switching device relay of the section signal and the transponder body, that is, the cable output from the transponder and the cable output from the signal switching device relay are electrically connected in the junction box.

[0031] As a further optimization scheme of the present invention, the signal switching device relay is connected to the switch signal of the external interlock control. The switch signal of the interlock control controls the signal light while controlling the validity and invalidity of the transponder body. The closed signal contact makes the transponder body invalid, or controls the resonant frequency to 1000Hz or 2000Hz.

[0032] The beneficial effects of the present invention are:

[0033] The present invention can realize the ground equipment of the complete Indusi system and can adapt to PZB on-board equipment with resonant frequencies of 500Hz, 1000Hz, and 2000Hz. It also has the function of detecting whether the track transponder is loose or detached from the rail, and can alert maintenance personnel in a long-term running train environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] FIG1 is a schematic diagram of the overall structure of the present invention;

[0035] FIG2 is a schematic structural diagram of the transponder body of the present invention;

[0036] FIG3 is a top view of the transponder body of the present invention;

[0037] FIG4 is a front view of the transponder body of the present invention;

[0038] FIG5 is a block diagram of a loosening warning device according to the present invention;

[0039] FIG6 is a block diagram of the CPU and acquisition circuit of the present invention.

[0040] In the figure: 1. Transponder body; 2. Rail; 3. Cable protector; 4. Antenna bracket; 5. Bottom mounting bracket; 6. Protection plate; 7. Junction box; 8. Cable; 9. Signal switching device relay; 10. Upper cover; 11. First sealing strip; 12. Main shell; 1201. Main cavity; 1202. First side cavity; 1203. Second side cavity; 13. Winding inductor; 14. Potting glue injection port; 15. Tuning capacitor PCB; 16. Exhaust hole; 17. Side test cover; 18. Nameplate; 19. Grounding screw; 20. Second sealing strip; 21. Side cover; 2101. Mounting hole; 2102. Test window; 22. Third sealing strip. DETAILED DESCRIPTION

[0041] The present application is described in further detail below in conjunction with the accompanying drawings. It is necessary to point out that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technicians in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0042] As shown in FIG1 , an Indusi rail transponder device includes a transponder body 1 , a mounting assembly, a cable assembly, and a signal switching device relay 9 .

[0043] The transponder body 1 (Indusi-Balise) of the present invention utilizes a passive LC series circuit structure, consisting of a tuning module and a winding inductor 13. The tuning module comprises a PCB (printed circuit board) 15 containing 500Hz, 1000Hz, and 2000Hz signal compensation resistors and a tuning capacitor. The tuning capacitor is used to match the winding inductance to form a resonant circuit at a specific frequency, while the resistor is used to attenuate signal strength. The winding inductor is the inductive component of the LC resonant circuit. Furthermore, the Indusi-Balise includes a loosening warning device for detecting whether the transponder body 1 is loose.

[0044] The Indusi rail transponder system includes the Indusi-Balise, a cable assembly, a mounting assembly, and a signal switching relay. The Indusi-Balise circuit structure consists of a tuning module and a winding inductor. The transponder body (1) is equipped with a looseness warning device to detect whether the transponder body (1) is loose.

[0045] In this embodiment, the Indusi rail transponder:

[0046] Indusi-Balise includes PM1020 and PM500 transponder devices. The PM1020 Indusi-Balise device has 1000Hz and 2000Hz resonance functions with the PZB vehicle-mounted antenna, and is compatible with 1000Hz and 2000Hz circuit switching; the PM500 Indusi-Balise device has 500Hz resonance function with the PZB vehicle-mounted antenna.

[0047] The Indusi-Balise circuit principle is a passive LC series structure, and its structure consists of a tuning module and a winding inductor. The tuning module is a PCB containing 500Hz, 1000Hz, and 2000Hz signal compensation resistors and tuning capacitors. The tuning capacitor is used to match the inductance of the winding to form a resonant circuit of a specific frequency, and the resistor is used to attenuate the signal strength; the winding inductor 13 is the inductive component of the LC resonant circuit.

[0048] To ensure proper installation height and current variation during vehicle-to-ground induction, the mutual inductance of the vehicle-to-ground winding must be controlled. Assuming the required vehicle-to-ground mutual inductance distance is no greater than 17.5 cm, the inductance within the housing must be no less than 121 mH. The inductor schematic is as follows: It consists of a magnetic rod and winding. The winding is a non-metallic molded part that fits over the magnetic rod and is wound with enameled wire.

[0049] Magnetic bar size: Φ50·480.

[0050] Magnetic rod material: Manganese zinc ferrite PC40 or other magnetic materials suitable for 2000Hz characteristics.

[0051] As shown in Figure 2, the design dimensions of Indusi-Balise are (width, length, height) 220·710·120 mm or close to these dimensions. During installation, the cable protector 3 is installed on the bottom mounting bracket 5 to protect the cable from being stepped on by external forces. A track transponder body 1 is equipped with two left and right antenna brackets 4, and the two antenna brackets 4 are installed on two bottom mounting brackets 5. The bottom mounting bracket 5 is installed on the rail 2. Two protective plates 6 are installed on the rail to protect the Indusi-Balise track transponder body 1 from being hit by gravel or other objects splashed by the running train. The transponder body 1 has a nameplate 18 on the outside.

[0052] As shown in Figure 3, the Indusi-Balise rail transponder is divided into three chambers and four sealed openings. These chambers are the main chamber 1201 for the magnetic rod, the first side chamber 1202 for the PCB 15, and the second side chamber 1203 for the cable terminals and testing.

[0053] As shown in Figure 4, the main cavity 1201 and the first side cavity 1202 are potted with potting glue. The upper cover 10 is superimposed with the first sealing strip 11 and connected to the main shell 12 by screws to form the main cavity 1201 with a closed space. A potting glue injection port 14 is left in the test cavity on the side of the main cavity, and the glue is injected through this port. During the potting process, the air inside the cavity is discharged through the exhaust hole 16 on the side of the antenna.

[0054] There is a first sealing strip 11 between the upper cover 10 and the main shell 12. A rubber strip is placed in a groove on the edge of the main shell. The SMC upper cover 10 is tightened by screws so that the gap between the upper cover 10 and the main shell 12 is squeezed to a close contact. At the same time, there is foam glue inside, so that the main cavity can achieve a sealing effect of IP67 and above; the side test cover 17 is superimposed with a third sealing strip 22 and fixed to the test window 2102 on the side cover 21, so that the test window is sealed to IP67 and above.

[0055] The pigtail cable is secured to the mounting hole 2101 of the side cover 21 using a metal waterproof gland that meets IP68 standards. The side cover 21, overlaid with a second sealing strip 20, is secured to the main housing 12, achieving a sealing effect that meets IP67 standards. Furthermore, a 2mm-thick, 30mm-diameter waterproof rubber sheath (cable protection sleeve) is placed over the cable. The cable protection sleeve is secured to the gland using a metal hoop, and another metal hoop secures the sleeve to the pigtail cable. The cable guard 3 is mounted on the mounting bracket 5, protecting the pigtail cable from exposure to ballast, sunlight, and rain.

[0056] Main housing 12 is made of aluminum. Considering the impact of magnetic field strength, the product's magnetic field principle is minimally affected by aluminum. Top cover 10 is made of non-metallic material (metal is not permitted for the vehicle antenna's magnetic induction function). Top cover 10 is made of SMC. Grounding screws 19 are provided on the outside of main housing 12.

[0057] Install the components:

[0058] The mounting assembly includes a mounting frame and an Indusi-Balise protection frame 6. The mounting frame is fixed to the base of the rail, and the Indusi-Balise is installed on the mounting frame 5. The protection frame is installed at the front and rear ends of the Indusi-Balise on the side of the rail to protect the Indusi-Balise from being hit by debris or other objects splashed by the running train.

[0059] Signal switching device relay:

[0060] The signal switching device relay 9 is connected to the switch signal of the external interlock control. The switch signal of the interlock control controls the validity and invalidity of Indusi-Balise while controlling the signal light. The closed signal contact makes Indusi-Balise invalid, or controls the PM1020 transponder to 1000Hz resonant frequency or 2000Hz frequency.

[0061] The three groups of nodes of the signal switching device relay 9 are used to access the PM1020 and PM500 transponders, and the relay has the function of controlling the nodes retrieved by the interlocking equipment.

[0062] Table 1 Control Indusi-Balise resonant frequency truth table

[0063] Cable Assemblies:

[0064] The cable assembly includes a four-core cable 8 and a junction box 7. The junction box 7 provides both cable connection and waterproof and dustproof functionality. The junction box 7 connects the cable assembly between the signal switching device relay 9 and the transponder body 1 of the section signal. Specifically, the cable 8 from the transponder body 1 is connected to the junction box 7, and the output cable 8 from the signal switching device relay 9 is connected to the junction box 7, completing the electrical connection within the junction box 7.

[0065] Loosening warning device:

[0066] The track transponder body 1 is installed on the bottom of the rail through a mounting bracket. When the train runs on the rail, the vibration of the rail is transmitted to the track transponder through the mounting bracket. The vibration sensor 81 in the track transponder converts the vibration signal into a voltage signal and transmits it to the CPU and acquisition circuit 82. The CPU has an AD analog signal conversion digital signal, that is, a voltage signal. The CPU collects the voltage signal after vibration and performs time domain conversion to frequency domain signal algorithm processing. The frequency domain data can reflect the energy intensity of signals with different frequency characteristics. The characteristic frequency of the train running on the rail is a signal in a small frequency range. Therefore, the CPU intercepts the data in this frequency range, calculates the root mean square sum, and obtains the energy signal. If it is determined that the energy signal is greater than a value for a continuous period of time, it is determined that the track transponder is not loose or has not detached from the rail, and outputs a high-level signal to the relay signal box to drive the status relay.

[0067] The battery 84 supplies power to the CPU and the acquisition circuit 82, and also supplies power to the vibration sensor 81. Since the CPU and the acquisition circuit 82 use low-power CPU and the vibration sensor 81 circuit has extremely low energy consumption, the battery 84 can be replaced once a year or more.

[0068] The main components of this function are shown in FIG5 , which include a vibration sensor 81 , a CPU and acquisition circuit 82 , a signal isolation circuit 83 , and a battery 84 .

[0069] The vibration sensor 81 is a vibration sensor installed in the track transponder, which can convert the vibration signal into a voltage signal. The battery 84 provides voltage and transmits the converted voltage signal to the CPU and the acquisition circuit 82.

[0070] The CPU and acquisition circuit 82 convert analog voltage signals into digital information data and perform A / D conversion. The CPU controls A / D acquisition and data processing, and determines whether the track transponder is properly installed based on the vibration signal processing results. The judgment result, whether good or bad, is output to the signal isolation circuit 83 according to the high or low level.

[0071] The signal isolation circuit 83 is powered by a battery and uses an optocoupler or relay device to perform the isolation function. The input signal is the switch signal output from the CPU 82, and the output side is provided by an external power line.

[0072] As shown in FIG6 , the CPU and the acquisition circuit 82 complete data processing internally, and are mainly composed of the following logic block diagram: A / D acquisition module 91, filtering module 92, FFT frequency domain calculation module 93, FFT result complex modulus calculation module 94, energy calculation module 95, and threshold judgment module 96.

[0073] The A / D acquisition module 91 controls the sampling rate of the signal to be approximately 10 kHz.

[0074] The filter module 92 is configured as an IIR bandpass filter, and the filter frequency is the same as the sampling frequency controlled by the A / D acquisition module 91. The filter cutoff frequency is set to the frequency range K1-K2 of rail vibration during train operation, filtering out interference frequencies other than the characteristic frequency of rail vibration.

[0075] The FFT frequency domain calculation module 93 performs FFT Fourier transform calculation on the bandpass filtered data and outputs the complex components of each frequency point from 0 Hz to the sampling rate. The formula is: Z(n)=X(n)+j·Y(n);

[0076] Where n represents the frequency point number, Z(n) represents the signal component at the frequency point, X(n) represents the real part of the signal component at the frequency point, and Y(n) represents the imaginary part of the signal component at the frequency point.

[0077] The FFT result complex modulus calculation module 94 performs modulus calculation on the output result Z(n)=X(n)+j·Y(n) of the FFT frequency domain calculation module 93, and the formula is:

[0078] The energy calculation module 95 calculates the average value of the modulus value output by the FFT result complex modulus calculation module 94 and the point modulus values ​​within the frequency range K1 to K2 to obtain the maximum value.

[0079] The threshold determination module 96, in the first step, determines whether the average modulus value is greater than the average threshold value A; in the second step, determines whether the maximum value is greater than the peak threshold value B; in the third step, counts the number C of points within K1-K2 whose modulus values ​​are greater than the average threshold value A, ensuring that the number is greater than 1 / 20 of the total number of points within K1-K2. In the fourth step, if the conditions of the first three steps are met for one consecutive second, the received vibration signal is considered normal, indicating that the rail transponder is fully installed on the rail and is not loose.

[0080] The above-described embodiments merely illustrate several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, and all such variations and improvements fall within the scope of protection of the present invention.

Claims

1. An Indusi rail transponder device, characterized in that: The transponder body (1) comprises a tuning module and a winding inductor (13), the tuning module comprises a signal compensation resistor of multiple frequencies for attenuating signal strength, and a tuning capacitor PCB (15) for matching the winding inductor (13) to form an LC resonant circuit of a specific frequency; The transponder body (1) is provided with a loosening warning device for detecting whether the transponder body (1) is loose.

2. An Indusi rail transponder device according to claim 1, characterized in that: The signal compensation resistors of multiple different frequencies include a 500 Hz signal compensation resistor, a 1000 Hz signal compensation resistor and a 2000 Hz signal compensation resistor, which respectively have a 500 Hz resonance function, a 1000 Hz resonance function and a 2000 Hz resonance function with the PZB vehicle-mounted antenna.

3. The Indusi rail transponder device according to claim 1, characterized in that: The winding inductor (13) comprises a magnetic bar and a winding. The winding is a non-metallic molded part, which is sleeved on the magnetic bar and has an enameled wire wound around it.

4. The Indusi rail transponder device according to claim 1, characterized in that: The loosening warning device comprises a vibration sensor (81), a CPU and an acquisition circuit (82), a signal isolation circuit (83) for signal isolation, and a storage battery (84) for power supply; The vibration sensor (81) is used to collect vibration signals, convert the vibration signals into voltage signals and transmit them to the CPU and the collection circuit (82); The CPU and the acquisition circuit (82) are used to make a determination based on the voltage signal and obtain a determination result, and output the determination result to the signal isolation circuit (83) according to high and low levels.

5. An Indusi rail transponder device according to claim 4, characterized in that: The CPU and acquisition circuit (82) comprises an A / D acquisition module (91), a filtering module (92), an FFT frequency domain calculation module (93), an FFT result complex modulus calculation module (94), an energy calculation module (95) and a threshold judgment module (96); The A / D acquisition module (91) is used to sample signals within a preset frequency range; The filtering module (92) is used to filter out interference frequencies other than the rail vibration characteristic frequency; The FFT frequency domain calculation module (93) is used to perform FFT Fourier transform calculation on the filtered data and output the complex components of each frequency point between 0 Hz and the sampling rate. The formula is: Z(n)=X(n)+j·Y(n); Where n represents the frequency point number, Z(n) represents the signal component at the frequency point, X(n) represents the real part of the signal component at the frequency point, and Y(n) represents the imaginary part of the signal component at the frequency point. The FFT result complex modulus calculation module (94) is used to perform modulus calculation on the output result of the FFT frequency domain calculation module (93), and the formula is as follows: The energy calculation module (95) is used to calculate the average value and the maximum value of the point modulus values ​​output by the FFT result complex modulus calculation module (94) within the frequency range of rail vibration; The threshold judgment module (96) is used to judge whether the transponder body (1) is loose based on the average value and the maximum value.

6. An Indusi rail transponder device according to claim 5, characterized in that: The specific process of the value judgment module (96) for judging whether the transponder body (1) is loose based on the average value and the maximum value is as follows: Set the average value threshold and peak value threshold; Determine whether the average value of the modulus value is greater than the average value threshold; Determine whether the maximum value of the modulus value is greater than the peak threshold; Counting whether the number of points within the frequency range of rail vibration whose modulus values ​​are greater than the average value threshold is greater than 1 / 20 of the total number of points within the frequency range of rail vibration; If the first three conditions are met for one second continuously, it is considered that the received vibration signal is normal, that is, it is determined that the transponder body (1) is not loosely installed; otherwise, it is determined that the transponder body (1) is loosely installed.

7. The Indusi rail transponder device according to claim 1, characterized in that: The transponder body (1) comprises a main shell (12), a bracket (4) is arranged on the main shell (12), a bottom mounting frame (5) is arranged on the bracket (4), and the bottom mounting frame (5) is installed on the rail (2); protective plates (6) are arranged on both sides of the transponder body (1), and the protective plates (6) are installed on the rail (2).

8. An Indusi rail transponder device according to claim 7, characterized in that: The transponder body (1) is provided with a main cavity (1201) for placing a magnetic rod, a first side cavity (1202) for placing a tuning capacitor PCB (15), and a second side cavity (1203) for installing a cable terminal and for testing; the main cavity (1201) and the first side cavity (1202) are potted with potting glue.

9. The Indusi rail transponder device according to claim 1, characterized in that: It also includes a cable assembly and a signal switching device relay (9), wherein the cable assembly includes a cable protection member (3) installed on the transponder body (1), a cable (8) and a junction box (7), wherein the junction box (7) is used to connect the cable assembly between the signal switching device relay (9) of the section signal and the transponder body (1), that is, the cable (8) output from the transponder (1) and the cable (8) output from the signal switching device relay (9) are electrically connected in the junction box (7).

10. An Indusi rail transponder device according to claim 9, characterized in that: The signal switching device relay (9) is connected to the switch signal of the external interlock control, and the switch signal of the interlock control controls the signal light and controls the validity and invalidity of the transponder body (1) at the same time. The closed signal contact makes the transponder body (1) invalid, or controls the resonant frequency to 1000Hz or 2000Hz.

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