Calibration device for track circuit dynamic detection system

Abstract

The utility model discloses a calibration device for a track circuit dynamic detection system, and relates to the technical field of track circuit dynamic detection. The device comprises a signal source module, a power amplifier, a load resistor and an ampere meter, the controller outputs a control signal to the signal generator; the signal generator outputs a current signal to the gain regulator based on the control signal; the gain regulator outputs the current signal after gain regulation to the power amplifier based on the current signal; the power amplifier outputs an amplified current signal to the load resistor based on the current signal after gain adjustment; according to the utility model, the precision and the stability of the output current signal can be improved, and the stability, the accuracy and the efficiency of the calibration of the track circuit dynamic detection system can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to transformer direct current resistance technical field, especially a track circuit dynamic detection system calibration device. BACKGROUND

[0002] This section aims to provide background or context for the embodiments of the utility model recited in the claims. The description herein is not admitted to be prior art merely by inclusion in this section.

[0003] The track circuit dynamic detection system is applied to high-speed comprehensive detection trains and electric service detection cars, and realizes dynamic testing of track circuit signal amplitude and frequency parameters. In order to ensure the credibility of the detection results and meet the value traceability requirements, the detection system must be calibrated periodically. At present, the detection system is calibrated once every 12 months. It uses a universal locomotive signal ring line code box (code generator) as a signal source, provides ZPW-2000 track circuit signals, simulates the rail magnetic field through the ring cable bearing track circuit signals, and obtains the calibration coefficient by comparing the detection system output results with the theoretical true value, thereby realizing the calibration of the detection system.

[0004] The signal source is the core component of the calibration system, which directly affects the calibration results. In the field calibration operation of the EMU depot, vehicle depot and the like, it is found that the problems brought by the universal locomotive signal ring line code box (code generator) as the calibration signal source mainly include: (1) the output signal power and amplitude accuracy are low, the harmonic distortion is large, the output current amplitude cannot cover the detection system range, and the output current amplitude will fluctuate up and down in the field calibration operation, which is not stable enough; (2) the frequency and current signals are adjusted in a stepping manner using buttons, which is tedious and time-consuming, and reduces the work efficiency of the field calibration personnel. The above-mentioned deficiencies in the field calibration work seriously affect the work efficiency of the calibration personnel in the field, and also affect the calibration accuracy of the track circuit dynamic detection system, resulting in insufficient accuracy of the track circuit dynamic detection data, which is not conducive to guiding the field maintenance and repair. UTILITY MODEL CONTENTS

[0005] The utility model embodiment provides a track circuit dynamic detection system calibration device, which is used to improve the stability and accuracy of the track circuit dynamic detection system calibration, reduce the uncertainty of the track circuit dynamic detection data introduced in the calibration operation link, and improve the accuracy of the track circuit dynamic detection results. The device comprises: a signal source module, a power amplifier, a load resistor and an ammeter.

[0006] The output end of the signal source module is connected to the input end of the power amplifier, the first output end of the power amplifier is connected to the first end of the load resistor, the second end of the load resistor is connected to the first end of the ammeter, and the second end of the ammeter is connected to the second output end of the power amplifier.

[0007] The signal source module comprises a controller, a signal generator connected with the controller, and a gain adjuster connected with the signal generator; the controller is configured to output a control signal to the signal generator; the signal generator is configured to receive the control signal and output a current signal to the gain adjuster based on the control signal; and the gain adjuster is configured to output a gain-adjusted current signal to the power amplifier based on the current signal.

[0008] The power amplifier is configured to output an amplified current signal to a load resistor based on the gain-adjusted current signal; and the ammeter is configured to display and output the current signal after passing through the load resistor to the signal source module.

[0009] Further, the output end of the ammeter is further connected to a TCR (Track circuit reader) antenna center of the track circuit dynamic detection system.

[0010] Further, the load resistor is a multi-strand copper non-armor or non-shielded sheath cable; the cross-sectional area of the cable is greater than a preset cross-sectional area; the length of the cable is a first preset length; and the two ends of the cable adopt banana plug.

[0011] Further, the TCR antenna center is arranged below the train in which the track circuit dynamic detection system is arranged.

[0012] The cable is a loop cable, which is laid along the rail surface directly below the TCR antenna center; the distance between the closed end of the cable and the TCR antenna center is a first preset distance, and the length of the cable along the rail is a second preset length.

[0013] Further, the power amplifier comprises a power amplification chip, a transistor circuit, and a MOS (Metal-Oxide-Semiconductor Field-Effect Transistor) tube circuit; the input end of the power amplification chip is the input end of the power amplifier; the first output end of the power amplification chip is connected to the input end of the transistor circuit, and the second output end of the power amplification chip is connected to the input end of the MOS tube circuit; and the output end of the MOS tube circuit is the output end of the power amplifier.

[0014] Further, a current-limiting resistor is further connected in series between the power amplifier and the load resistor.

[0015] Further, the gain adjuster comprises a multiplier and a DAC (Digital-to-Analog Converter).

[0016] Further, the track circuit dynamic detection system calibration device further comprises a power module, the output ends of the power module are connected to the input ends of the signal generator and the power amplifier respectively, and the power module is used to convert commercial power into power required by the track circuit dynamic detection system calibration device, so as to supply power for the track circuit dynamic detection system calibration device.

[0017] Further, the track circuit dynamic detection system calibration device further comprises a shell and a heat dissipation hole arranged on one side of the shell; the signal source module and the power amplifier are arranged in the shell; the first output end and the second output end of the power amplifier are fixed in the through holes of the shell; and the heat dissipation hole is used to dissipate heat in the shell.

[0018] Further, the amplified current signal is a sine wave, and the total harmonic distortion is less than a preset threshold.

[0019] Compared with the general locomotive signal ring line code generating box as the calibration signal source in the prior art, the utility model has the beneficial effects that: the utility model discloses a signal source module, a power amplifier, a load resistance and an ammeter, the output end of the signal source module is connected to the input end of the power amplifier, the first output end of the power amplifier is connected to the first end of the load resistance, the second end of the load resistance is connected to the first end of the ammeter, the second end of the ammeter is connected to the second output end of the power amplifier, and the operation time is saved, the signal source module comprises a controller, a signal generator connected to the controller and a gain adjuster connected to the signal generator, the controller is used to output a control signal to the signal generator, the signal generator is used to receive the control signal, output a current signal to the gain adjuster based on the control signal, and the output current signal is stable and has a large amplitude, the gain adjuster is used to output a gain-adjusted current signal to the power amplifier based on the current signal, the power amplifier is used to output an amplified current signal to the load resistance based on the gain-adjusted current signal, and the ammeter is used to display and output the current signal after passing through the load resistance to the signal source module, so that the precision and stability of the output current signal are improved, and the stability, accuracy and efficiency of the track circuit dynamic detection system calibration are improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings. In the drawings:

[0021] Figure 1 It is a schematic view of the track circuit dynamic detection system calibration device provided in the embodiments of the present application;

[0022] Figure 2 is a schematic view of a specific example of a track circuit dynamic detection system calibration device provided in an embodiment of the present application;

[0023] Figure 3 is a surface view of a track circuit dynamic detection system calibration device provided in an embodiment of the present application Figure 1 ;

[0024] Figure 4 is a surface view of a track circuit dynamic detection system calibration device provided in an embodiment of the present application Figure 2 ;

[0025] Figure 5 is a schematic view of a principle of a track circuit dynamic detection system calibration device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the embodiments of the present application will be further described in detail below with reference to the drawings. Herein, the illustrative embodiments of the present application and the description thereof are used to explain the present application, but are not used as a limitation of the present application.

[0027] The acquisition, storage, use, processing and the like of data in the technical scheme of the present application all comply with the relevant provisions of laws and regulations.

[0028] The term "and / or" in the present application is merely used to describe an associated relationship, which means that there can be three relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. In addition, the term "at least one" in the present application means any one of a plurality of or any combination of at least two of a plurality of, for example, including at least one of A, B and C can mean including any one or more elements selected from the set consisting of A, B and C.

[0029] In the description of the present application, "including", "containing", "having", "comprising" and the like are all open terms, which means including but not limited to. The description of the terms "one embodiment", "one specific embodiment", "some embodiments", "for example" and the like means that the specific features, structures or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. The order of the steps involved in the embodiments is used to illustrate the embodiments of the present application, and the order of the steps is not limited, which can be adjusted as needed.

[0030] Based on the problems of the prior art, how to provide a new calibration device, improve the existing signal source, and improve the stability and accuracy of the track circuit dynamic detection system calibration, is a technical problem to be solved in the field.

[0031] The utility model provides a track circuit dynamic detection system calibration device, solve the prior art problem. The utility model discloses a miniaturized, high -power, high -precision and easy operation's track circuit dynamic detection system calibration device, and its signal output is stable and amplitude is big, is used for the accurate calibration of track circuit dynamic detection system in the environment of motor car depot, vehicle depot, and this reduces the uncertainty of track circuit dynamic detection data in the calibration operation link, improves the accuracy of track circuit dynamic detection result. Figure 1 A track circuit dynamic detection system calibration device provided in the utility model embodiment is shown in a schematic diagram, as shown in Figure 1 The track circuit dynamic detection system calibration device can include: a signal source module, a power amplifier, a load resistor, and an ammeter.

[0032] The output end of the signal source module is connected to the input end of the power amplifier, the first output end of the power amplifier is connected to the first end of the load resistor, the second end of the load resistor is connected to the first end of the ammeter, and the second end of the ammeter is connected to the second output end of the power amplifier.

[0033] The signal source module includes a controller, a signal generator connected to the controller, and a gain adjuster connected to the signal generator. The controller is used to output a control signal to the signal generator. The signal generator is used to receive the control signal and output a current signal to the gain adjuster based on the control signal. The gain adjuster is used to output a gain-adjusted current signal to the power amplifier based on the current signal.

[0034] The power amplifier is used to output an amplified current signal to the load resistor based on the gain-adjusted current signal. The ammeter is used to display and output the current signal after passing through the load resistor to the signal source module.

[0035] The above device is superior to the currently used general locomotive signal ring line code box in terms of power and amplitude accuracy, stability, operability, volume and weight, and portability. At the same time, the ammeter is used as a quantity traceability tool, which greatly improves the work efficiency of the field calibration personnel and the accuracy of the calibration results.

[0036] The track circuit dynamic detection system calibration device provided by the utility model can provide ZPW-2000 type track circuit signals, the working frequency range is 10Hz-3000Hz, the output current is 0A-13A (effective value), and the step is 0.1mA (effective value).

[0037] The signal waveform provided by the track circuit dynamic detection system calibration device can be a sine wave, and the total harmonic distortion (THD) is less than 2% at 1 kHz, and the current is 13A (effective value).

[0038] The track circuit dynamic detection system calibration device has a size of not more than 350mm*135mm*365mm, and a weight of not more than 10kg.

[0039] The track circuit dynamic detection system calibration device can work continuously for 12 hours.

[0040] The track circuit dynamic detection system calibration device provides an ammeter, and the frequency and alternating current signal measurement indicators are superior to the track circuit calibration signal measurement requirements, and realize the value traceability of the track circuit dynamic detection system calibration.

[0041] The signal generator of the track circuit dynamic detection system calibration device can also output a current-carrying signal or a low-frequency signal.

[0042] Figure 2 A specific example of a track circuit dynamic detection system calibration device provided in an embodiment of the utility model is shown in a schematic diagram as shown in Figure 2 In an embodiment, the power amplifier includes a power amplifier (AMP) chip, a triode circuit (not shown in the figure), and a MOS tube circuit (not shown in the figure); the input end of the power amplifier chip is the input end of the power amplifier; the first output end of the power amplifier chip is connected to the input end of the triode circuit, and the second output end of the power amplifier chip is connected to the input end of the MOS tube circuit; the output end of the MOS tube circuit is the output end of the power amplifier. The three cooperate to amplify power and current.

[0043] As shown in Figure 2 In an embodiment, a current-limiting resistor RS is further connected in series between the power amplifier and the load resistor. Impedance matching and current-limiting protection are realized, so that the current signal is more stable and effective.

[0044] In this embodiment, the signal generator can be a DDS (Direct Digital Synthesis) signal generator. The controller can be completely realized by some hardware entities, such as a pure hardware signal generator, without relying on computer software programs.

[0045] In an embodiment, the gain adjuster can include a multiplier and a DAC.

[0046] As shown in Figure 3 The signal source module internally realizes ZPW-2000 track circuit carrier frequency signal and low-frequency signal output by relying on DDS, a multiplier, and a DAC.

[0047] In one embodiment, the output end of the ammeter is also connected to the center of the TCR antenna of the track circuit reader of the track circuit dynamic detection system. The ammeter outputs the current value to the track circuit dynamic detection system through the TCR antenna center, so that the track circuit dynamic detection system can compare the received voltage value with the track circuit detection system's detection results to obtain a calibration coefficient, thereby calibrating the track circuit dynamic detection system. It should be noted that the track circuit dynamic detection system compares the received voltage value with the track circuit detection system's detection results to obtain the calibration coefficient, and the calibration process of the track circuit dynamic detection system is all implemented in hardware.

[0048] In one embodiment, the load resistor is a multi-strand copper non-armored or non-shielded sheathed cable; the cross-sectional area of ​​the cable is larger than the preset cross-sectional area; the length of the cable is a first preset length; and banana plugs are used at both ends of the cable. Figure 2 As shown, the load resistance RL can be 12m, and the cross-sectional area ≥ 6mm 2 , banana plugs are used at both ends of the cable to facilitate connection to the output terminals of the signal source.

[0049] In one embodiment, the center of the TCR antenna is set below the train where the track circuit dynamic detection system is located; the cable is a loop cable, laid along the track surface directly below the center of the TCR antenna; the distance between the closed end of the cable and the center of the TCR antenna is a first preset distance, and the length of the cable along the track is a second preset length.

[0050] In one embodiment, the track circuit dynamic detection system calibration device may provide one output port, which may adopt a 4mm banana plug and may match a loop cable.

[0051] Figure 3 A schematic diagram of a track circuit dynamic detection system calibration device provided in an embodiment of the present utility model Figure 1 ,like Figure 3 As shown, in one embodiment, the display area is specifically used to receive and display input information entered by the user through buttons. The required current value and carrier frequency or low frequency can be quickly set and displayed. The low frequency display includes L, L2, L3, L4, L5, LU, U, HU, which works synchronously with the instrument output. The preset current values ​​and frequencies corresponding to the four carrier frequencies of 1700Hz, 2000Hz, 2300Hz, and 2600Hz in the range of 100mV to 2000mV are provided. A button is set every 100mV, for a total of 20. In addition, as Figure 3As shown, a fine-tuning knob is provided for gain adjustment; "left" and "right" buttons are provided for real-time adjustment of the current output by the signal source module. An output switch and a power switch are provided for controlling the output and power supply. It is important to note that the fine-tuning knob, "left" and "right" buttons mentioned above, as well as the output switch and power switch, all implement their corresponding functions through hardware. For example, the fine-tuning knob may include internal gain adjustment circuitry.

[0052] In one embodiment, the track circuit dynamic detection system calibration device also includes a shell and a heat dissipation hole arranged on one side of the shell; the signal source module and the power amplifier are arranged inside the shell; the first output end and the second output end of the power amplifier are fixed in the through hole of the shell; the heat dissipation hole is used to dissipate the heat in the shell.

[0053] In one embodiment, the amplified current signal is a sine wave, and the total harmonic distortion is less than a preset threshold.

[0054] like Figure 3 As shown, in one embodiment, the surface of the track circuit dynamic detection system calibration device also provides an output interface, including "output +" and "output -".

[0055] Calibration operations are generally carried out in train depots and vehicle sections. Existing signal source equipment is large in size and heavy in weight, making it inconvenient to carry over long distances and easily damaged during transportation, which in turn affects the equipment's performance and reliability, and is inconvenient for calibration personnel to operate on-site.

[0056] In one embodiment, the track circuit dynamic detection system calibration device further includes a pull rod and wheelset module for loading a signal source module, an ammeter, and a load resistor. This facilitates long-distance transportation and reduces the labor intensity of calibration personnel when carrying the equipment.

[0057] In one embodiment, the track circuit dynamic detection system calibration device may further include a power supply module. The output of the power supply module is connected to the input of the signal generator and the power amplifier, respectively, for converting mains electricity into the power required by the track circuit dynamic detection system calibration device to power the device. This module can adopt an AC110-240V, 50 / 60Hz power supply module, facilitating direct connection to the mains electricity to convert the power required by the track circuit dynamic detection system calibration device for operation.

[0058] Figure 4 A schematic diagram of a track circuit dynamic detection system calibration device provided in an embodiment of the present utility model Figure 2 ,like Figure 4 As shown, the back of the track circuit dynamic detection system calibration device can also be provided with heat dissipation holes ( Figure 4AC 110~240V, 50 / 60Hz power supply connection port (left side) Figure 4 upper right side), power switch and data interface RS232 (lower right side), the output frequency and current information can be inquired through the data interface RS232. Figure 4

[0059] Figure 5 A principle schematic view of the utility model embodiment is shown in the figure, and the operation steps of the track circuit dynamic detection system calibration device can be as follows: Figure 5

[0060] (1) after the first wheel of the comprehensive detection train (electricity detection vehicle), the TCR antenna center is directly below, and the loop cable is laid along the rail surface. The closed end of the loop cable is 1.5m away from the TCR antenna center, the length along the rail is 4m, the track gauge is 1435mm, the loop cable is laid flat, straight, and fixed well; the track circuit dynamic detection system is provided with a GPS (Global Positioning System);

[0061] (2) one end of the loop cable is connected to the signal source "output+", and the other end is connected to the ammeter, and then connected to the signal source "output-";

[0062] (3) connect the signal source and the ammeter to the 220V power supply respectively, and turn on the signal source and the ammeter power switch;

[0063] (4) press the signal source "output switch" button, and the signal source starts to work;

[0064] (5) press the download frequency "1700Hz" button, the low frequency "L" button, and the power preset "100mV" button, and the corresponding carrier frequency, low frequency and current value (100mV voltage corresponding to the standard current value) will be displayed;

[0065] (6) observe the frequency and current readings of the ammeter, and record the current value of the ammeter;

[0066] (7) the current value of the ammeter is transmitted to the track circuit dynamic detection system through the TCR antenna center (TCR antenna, TCR junction box); the output result of the track circuit dynamic detection system on the vehicle is observed through the display unit, and the calibration value is recorded;

[0067] (8) the remaining 200mV~2000mV (each voltage has a corresponding standard current), 2000Hz~2600Hz calibration work is carried out according to the steps (5)~(7);

[0068] ​​(9)After the calibration of 1700Hz, 2000Hz, 2300Hz and 2600Hz is completed, the calibration coefficient of the detection system on the vehicle is saved, the power supply of the signal source and the ammeter is turned off, the 220V power supply is disconnected, the loop cable is removed from the steel rail, and the on-site calibration work is completed.

[0069] Through the above-mentioned circuit, the signal precision provided by the track circuit dynamic detection system calibration device can be ±0.5% red (reading) +1mArms.

[0070] Compared with the general locomotive signal loop code box (code generator) in the prior art as a calibration signal source, the utility model has the beneficial effects that: the utility model discloses a signal source module, a power amplifier, a load resistance, an ammeter, the output of the signal source module is connected with the input of the power amplifier, the first output of the power amplifier is connected with the first end of the load resistance, the second end of the load resistance is connected with the first end of the ammeter, and the second end of the ammeter is connected with the second output of the power amplifier, the signal source module comprises a controller, a signal generator connected with the controller and a gain adjuster connected with the signal generator, the controller is used for outputting a control signal to the signal generator based on input information, the signal generator is used for receiving the control signal and outputting a current signal to the gain adjuster based on the control signal, the output current signal is stable and has a large amplitude, the gain adjuster is used for outputting a gain-adjusted current signal to the power amplifier based on the current signal, the power amplifier is used for outputting an amplified current signal to the load resistance based on the gain-adjusted current signal, and the ammeter is used for displaying and outputting the current signal after the load resistance to the signal source module, so that the precision and stability of the output current signal are improved, and the stability, accuracy and efficiency of the track circuit dynamic detection system calibration are improved.

[0071] The utility model discloses the beneficial effect is: based on embedded technology, combines electromagnetic isolation technology, digital signal processing technology, realizes miniaturization, high power, high precision and the calibration device design of easy operation, provides a kind of track circuit dynamic detection system calibration device suitable for under the environment of motor car depot, vehicle depot.Solve the unstable on-site calibration data, calibration inefficiency, operation is complicated, not convenient for long-distance carrying etc., provide high-precision large amplitude track circuit calibration signal, improve the accuracy of track circuit dynamic detection system calibration, meet the need of on-site calibration.

[0072] Those skilled in the art can understand that the track circuit dynamic detection system calibration device can be realized by some hardware entities, such as pure hardware switch circuit, timer, timer, delay timer, etc., without relying on computer software program.

[0073] The above-described specific embodiments further specifically describe the purposes, technical solutions and beneficial effects of the present application, and it should be understood that the above-described specific embodiments are merely examples of the present application and are not intended to limit the protection scope of the present application, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A track circuit dynamic detection system calibration device, characterized in that: include: Signal source module, power amplifier, load resistor, ammeter; The output end of the signal source module is connected to the input end of the power amplifier, the first output end of the power amplifier is connected to the first end of the load resistor, the second end of the load resistor is connected to the first end of the ammeter, and the second end of the ammeter is connected to the second output end of the power amplifier; The signal source module includes a controller, a signal generator connected to the controller, and a gain adjuster connected to the signal generator; the controller is used to output a control signal to the signal generator; the signal generator is used to receive the control signal and output a current signal to the gain adjuster based on the control signal; the gain adjuster is used to output a gain-adjusted current signal to the power amplifier based on the current signal; The power amplifier is used to output an amplified current signal to the load resistor based on the current signal after gain adjustment; The ammeter is used to display and output the current signal after passing through the load resistor to the signal source module.

2. The track circuit dynamic detection system calibration device according to claim 1, characterized in that: The output end of the ammeter is also connected to the center of the track circuit reader TCR antenna of the track circuit dynamic detection system.

3. The track circuit dynamic detection system calibration device according to claim 2, characterized in that: The load resistor is a multi-strand copper non-armored or non-shielded sheathed cable; the cross-sectional area of ​​the cable is larger than the preset cross-sectional area; the length of the cable is a first preset length; and banana plugs are used at both ends of the cable.

4. The track circuit dynamic detection system calibration device according to claim 3, characterized in that: The center of the TCR antenna is arranged below the train where the track circuit dynamic detection system is located; The cable is a loop cable, which is laid along the track surface directly below the center of the TCR antenna; the distance between the closed end of the cable and the center of the TCR antenna is a first preset distance, and the length of the cable along the track is a second preset length.

5. The track circuit dynamic detection system calibration device according to claim 1, characterized in that: The power amplifier includes a power amplifier chip, a triode circuit, and a metal oxide semiconductor field effect transistor (MOS) circuit; the input end of the power amplifier chip is the input end of the power amplifier; the first output end of the power amplifier chip is connected to the input end of the triode circuit, and the second output end of the power amplifier chip is connected to the input end of the MOS circuit; the output end of the MOS circuit is the output end of the power amplifier.

6. The track circuit dynamic detection system calibration device according to claim 1, characterized in that: A current limiting resistor is further connected in series between the power amplifier and the load resistor.

7. The track circuit dynamic detection system calibration device according to claim 1, characterized in that: The gain regulator includes a multiplier and a digital-to-analog converter; the input end of the multiplier is the input end of the gain regulator, the output end of the multiplier is connected to the input end of the digital-to-analog converter, and the output end of the digital-to-analog converter is the output end of the gain regulator.

8. The track circuit dynamic detection system calibration device according to claim 1, characterized in that: It also includes a power supply module, the output end of the power supply module is respectively connected to the input end of the signal generator and the power amplifier, and is used to convert the mains electricity into the power required by the track circuit dynamic detection system calibration device for operation of the track circuit dynamic detection system calibration device.

9. The track circuit dynamic detection system calibration device according to claim 1, characterized in that: Also includes: A housing and a heat dissipation hole provided on one side of the housing; The signal source module and the power amplifier are arranged inside the housing; the first output terminal and the second output terminal of the power amplifier are fixed in the through hole of the housing; The heat dissipation holes are used to dissipate heat inside the housing.

10. The track circuit dynamic detection system calibration device according to claim 1, characterized in that: The amplified current signal is a sine wave, and the total harmonic distortion is less than a preset threshold.

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