Calibration system and calibration method for track insulation resistance on-line testing device

Abstract

The invention provides a calibration system and a calibration method for a track insulation resistance on-line test device, and the system comprises the steps: installing a to-be-calibrated track insulation resistance on-line test device through an energy supply installation assembly, and obtaining a result measured by the calibrated track insulation resistance on-line test device through a central control test board assembly; according to a result measured by the calibrated track insulation resistance online testing device and a calibration resistance value provided by the resistance box assembly, an error value of the track insulation resistance online testing device can be directly analyzed and obtained in the central control test bench assembly. Therefore, an operator can adjust the on-line testing device for the track insulation resistance based on the error value so as to complete the calibration operation. According to the invention, a set of highly automatic and accurate calibration system is constructed, the system can set parameters, test execution and error analysis in the whole process, the manual error is significantly reduced, and the efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of track insulation testing, and in particular relates to a calibration system and a calibration method for an online test device for track insulation resistance. Background Art

[0002] In railway operations, testing track insulation performance is one of the key links in ensuring driving safety. It is mainly used to test the insulation performance of insulating components in track circuits to ensure the normal operation of signal systems and driving safety. In order to efficiently and accurately evaluate the insulation status of tracks, track insulation resistance online test devices are often used. Track insulation measuring instruments are the most common track insulation resistance online test devices designed based on the principle of electromagnetic induction. They are used to directly detect the resistance value or impedance of key insulating components in track circuits (such as rail end insulation, turnout installation insulation, gauge rod insulation, etc.). Compared with traditional methods (such as multimeters or megohmmeters), their advantage is that measurements can be completed without disassembling the equipment, avoiding equipment damage or data distortion caused by disassembly, and significantly improving test efficiency and accuracy.

[0003] During use, the track insulation resistance online test device applies a high-frequency signal to the insulation segment to be tested and collects signals at both ends to convert the impedance value. However, during long-term use, due to the influence of factors such as natural aging, temperature changes, and physical stress, the key components in the track insulation resistance online test device (such as amplifiers, sensors, etc.) will experience performance drift, resulting in measurement deviations. If the track insulation resistance online test device is not calibrated, the insulation status may be misjudged during use, causing signal system failures or even traffic accidents.

[0004] In the prior art, calibration of an online track insulation resistance tester generally requires the use of a variety of instruments and equipment, such as signal generators, oscilloscopes, and resistance boxes, to create a calibration platform that simulates the on-site operation of the rails. Using this calibration platform, an operator manually performs a simulated test on the online track insulation resistance tester and collects the test results. The operator then analyzes the test results, obtains the error value of the online track insulation resistance tester, and performs calibration. However, due to the large number of instruments and equipment used, the low level of integration makes operation inconvenient, and the manual collection, acquisition, and analysis of test results is inefficient and susceptible to human uncertainty, resulting in technical problems such as large calibration errors and low efficiency. Summary of the Invention

[0005] In order to solve the technical problems in the background technology that, when calibrating a track insulation resistance online test device, a calibration platform needs to be built using multiple instruments and equipment, and an operator manually performs a simulation test and collects the obtained test results, and the operator analyzes the test results to obtain the error value of the track insulation resistance online test device, the instruments and equipment used are numerous, the degree of integration is low, the operation is inconvenient, the efficiency is low, and the device is easily affected by human uncertainties, resulting in large calibration errors and low utilization efficiency, the present invention provides a track insulation resistance online test device calibration system and calibration method.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] In a first aspect, the present invention provides a track insulation resistance online test device calibration system, the track insulation resistance online test device calibration system comprising: a resistance box assembly, a central control test bench assembly, an energy supply installation assembly and two simulated tracks;

[0008] The two simulation tracks are adjacently arranged with a gap therebetween, so that the two simulation tracks are in an insulated state;

[0009] The resistance box assembly spans the gap and is electrically connected to the two simulation tracks respectively;

[0010] The energy supply installation assembly is arranged close to the simulated track and is used to install the track insulation resistance online testing device to be calibrated;

[0011] The central control test bench assembly is electrically connected to the track insulation resistance online testing device to be calibrated;

[0012] The central control test bench assembly is used to obtain the calibrated resistance value provided by the resistance box assembly and the measured resistance value measured by the track insulation resistance online test device to be calibrated, analyze and output the error value of the track insulation resistance online test device to be calibrated, and perform calibration based on the error value.

[0013] Optionally, the track insulation resistance online test device calibration system further includes a cabinet;

[0014] The cabinet is provided with a receiving cavity, and the resistance box assembly, the energy supply installation assembly and the two simulation tracks are all arranged in the receiving cavity;

[0015] The central control test bench assembly is arranged on the cabinet outside the accommodating cavity.

[0016] Optionally, the track insulation resistance online test device calibration system further includes a robotic arm assembly;

[0017] The mechanical arm assembly is arranged in the accommodating cavity;

[0018] The mechanical arm assembly is electrically connected to the central control test bench assembly and is used to perform gear adjustment on the resistance box assembly to change the calibrated resistance value provided by the resistance box assembly.

[0019] Optionally, the energy supply installation assembly includes an energy supply seat and two measurement connection blocks;

[0020] Wherein, one of the measurement connection blocks is correspondingly arranged on a tread of the simulation track, and both are electrically connected to the tread of the simulation track;

[0021] The energy supply seat is arranged close to the simulated track and is used to install the track insulation resistance online testing device to be calibrated;

[0022] The track insulation resistance online testing device to be calibrated is electrically connected to the two measurement connection blocks respectively.

[0023] Optionally, the track insulation resistance online test device calibration system further includes a current detection device and a voltage detection device, wherein the voltage detection device and the current detection device are both electrically connected to the two measurement connection blocks, and are used to detect and obtain the voltage and current on the two measurement connection blocks;

[0024] The energy supply seat is provided with a frequency detection device for detecting the actual output frequency of the track insulation resistance online test device to be calibrated;

[0025] The frequency detection device, the voltage detection device and the current detection device are all electrically connected to the central control test bench assembly.

[0026] In a second aspect, the present invention provides a method for calibrating a track insulation resistance online test device, comprising the steps of:

[0027] S1: Install the track insulation resistance online test device to be calibrated: Install the induction coil and the measuring instrument body of the track insulation resistance online test device to be calibrated, and electrically connect the measuring instrument body to the two simulated tracks and the central control test bench component respectively, and start the central control test bench component;

[0028] S2: Set calibration parameters: Enter calibration parameters in the central control test bench component, control the robotic arm to adjust the resistance box component and the measuring instrument body, so that the output parameter values of the resistance box component and the measuring instrument body meet the calibration parameters;

[0029] S3: Perform test: Control the robotic arm to start the measuring instrument body, obtain measurement values and test data, and input the measurement values and test data into the central control test bench component; the measurement values include the measured resistance value and the measured frequency value;

[0030] S4: Obtaining error value: Using the central control test bench component, according to the calibration parameters, test data and measurement values, obtaining the error value of the track insulation resistance online test device to be calibrated under the calibration parameters, and outputting and storing the error value;

[0031] S5: Adjust calibration parameters: Adjust calibration parameters, repeat steps S2 to S4, perform multiple tests, and obtain error values of multiple tests;

[0032] S6: Calibrate: Calibrate the track insulation resistance online test device to be calibrated based on the error values of multiple tests.

[0033] Optionally, the calibration parameters in step S2 include: the resistance value of the trackbed of the simulated track, the signal frequency, signal low frequency and signal peak voltage output by the measuring instrument body, and the calibrated resistance value output by the resistance box assembly.

[0034] Optionally, step S3 specifically includes:

[0035] S3.1: Control the robotic arm to start the measuring instrument and output an electrical signal to the simulated track;

[0036] S3.2: Obtain measurement values through the induction coil and the measuring instrument body;

[0037] S3.3: Detecting the actual output frequency of the track insulation resistance online test device to be calibrated using a frequency detection device; detecting the actual voltage across the two measurement connection blocks using a voltage detection device; and detecting the actual current flowing between the two measurement connection blocks using a current detection device; using the actual output frequency and the actual voltage and current across the two measurement connection blocks as test data;

[0038] S3.4: Input the measurements and test data into the central control test bench component.

[0039] Optionally, step S4 includes:

[0040] S4.1: In the central control test bench assembly, compare the actual output frequency with the output frequency calibrated by the measuring instrument to obtain the relative frequency deviation value;

[0041] S4.2: Analyze and obtain the actual resistance value between the two measurement connection blocks based on the actual voltage and actual current in the test data;

[0042] S4.3: Compare the actual resistance value with the measured resistance value and analyze to obtain the resistance error value;

[0043] S4.4: The resistance error value and the relative frequency deviation value are used as error values of the track insulation resistance online test device to be calibrated under the calibration parameters, and are stored and output.

[0044] Optionally, the step S1 specifically includes:

[0045] S1.1: Fix the induction coil of the track insulation resistance online test device to be calibrated at the gap of the simulated track;

[0046] S1.2: Install the measuring instrument of the track insulation resistance online test device to be calibrated on the energy supply base, and electrically connect the measuring instrument body and the induction coil;

[0047] S1.3: Electrically connect the measuring instrument body and the central control test bench assembly, and start the central control test bench assembly.

[0048] The beneficial effects of the present invention are:

[0049] The present invention provides a track insulation resistance online test device calibration system, which simulates the actual online operation of a field track through two simulated tracks, and sets a gap between the simulated tracks to reproduce the structure of a track insulation joint. A resistance box assembly is used to connect the two simulated tracks, so that during the calibration test, a specific calibration resistance value is provided between the two simulated tracks according to calibration requirements. The track insulation resistance online test device to be calibrated is installed through an energy supply installation assembly, and a central control test bench assembly is used to obtain the measurement result of the track insulation resistance online test device to be calibrated. The error value of the track insulation resistance online test device can be directly analyzed in the central control test bench assembly according to the measurement result of the track insulation resistance online test device to be calibrated and the calibration resistance value provided by the resistance box assembly, so that an operator can adjust the track insulation resistance online test device based on the error value to complete the calibration operation. The present invention integrates a resistance box assembly, a dual simulated track structure (simulating the actual track gap insulation state), an energy supply installation assembly and a central control test bench assembly, and combines it with a robotic arm assembly and a voltage / current / frequency detection device to construct a highly automated and precise calibration system. The system can perform parameter setting, test execution and error analysis throughout the entire process, significantly reducing human errors and improving efficiency.

[0050] The present invention also provides a method for calibrating a track insulation online test device. Through the track insulation resistance online test device calibration system, the actual output frequency and the true voltage / current between tracks of the track insulation online test device to be calibrated are detected in real time, and multi-dimensional comparative analysis (such as resistance error and frequency deviation) is performed with the calibrated resistance value and the reading of the device to be tested. High-precision error tracing is achieved, thereby facilitating calibration and error elimination by operators, significantly improving accuracy and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 It is a schematic diagram of a calibration system for an online test device for track insulation resistance according to the present invention;

[0052] Figure 2 It is a front schematic diagram of the calibration system of the track insulation resistance online testing device of the present invention;

[0053] Figure 3 It is a schematic diagram of a calibration system cabinet of a track insulation resistance online test device in the present invention;

[0054] Figure 4 It is a schematic diagram of the cavity containing the calibration system of the track insulation resistance online test device of the present invention;

[0055] Figure 5 This is a schematic diagram of a specific cavity for accommodating the calibration system of the track insulation resistance online test device of the present invention;

[0056] Figure 6 It is a schematic diagram of a calibration method of a track insulation resistance online testing device in the present invention;

[0057] Figure 7 It is a schematic diagram of the output interface of the calibration method of the rail insulation resistance online test device on the central control test bench component in the present invention;

[0058] Figure 8 It is a schematic diagram of the output interface on the central control test bench component when the resistance error value is within the allowable range in the present invention;

[0059] Figure 9 It is a schematic diagram of the output interface on the central control test bench component when the resistance error value exceeds the allowable range in the present invention.

[0060] Among them: 1. Resistance box assembly; 11. Resistance box; 12. Fixing parts; 2. Central control test bench assembly; 3. Energy supply installation assembly; 31. Energy supply seat; 32. Measurement connection block; 4. Simulated track; 41. Rail bottom; 42. Rail waist; 43. Tread; 5. Track insulation resistance online test device; 51. Induction coil; 52. Measuring instrument body; 6. Cabinet; 61. Accommodating cavity; 7. Robotic arm assembly. DETAILED DESCRIPTION

[0061] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0062] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0063] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0064] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0065] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0066] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0067] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0068] Example 1

[0069] First, see Figures 1 to 5 , showing a schematic diagram of a track insulation resistance online test device calibration system of the present invention, the track insulation resistance online test device calibration system includes a resistance box assembly 1, a central control test bench assembly 2, an energy supply installation assembly 3 and two simulated tracks 4; the two simulated tracks 4 are arranged adjacent to each other and have a gap so that the two simulated tracks 4 are in an insulated state; the resistance box assembly 1 spans the gap and is electrically connected to the two simulated tracks 4 respectively; the energy supply installation assembly 3 is arranged close to the simulated tracks 4 and is used to install a track insulation resistance online test device 5 to be calibrated; the central control test bench assembly 2 is electrically connected to the track insulation resistance online test device 5 to be calibrated; the central control test bench assembly 2 is used to obtain the calibrated resistance value provided by the resistance box assembly 1 and the measured resistance value provided by the track insulation resistance online test device 5 to be calibrated, analyze and output the error value of the track insulation resistance online test device 5 to be calibrated, so that the operator can calibrate according to the error value.

[0070] In this embodiment, two simulated rails 4 are used to simulate the actual online operation of the on-site rails, and a gap is set between the simulated rails 4 to reproduce the structure of the rail insulation joint. The two simulated rails 4 are connected by a resistance box assembly 1 to provide a specific calibration resistance value between the two simulated rails 4 according to the calibration requirements during the calibration test. The rail insulation resistance online test device 5 to be calibrated is installed through the energy supply installation assembly 3, and the measurement results of the calibrated rail insulation resistance online test device 5 are obtained using the central control test bench assembly 2. The error value of the rail insulation resistance online test device 5 can be directly analyzed in the central control test bench assembly 2 based on the measurement results of the calibrated rail insulation resistance online test device 5 and the calibration resistance value provided by the resistance box assembly 1, so that the operator can adjust the rail insulation resistance online test device 5 based on the error value to complete the calibration operation. The track insulation resistance online test device calibration system in the present invention integrates a resistance box component, a dual simulated track structure (simulating the actual track gap insulation state), an energy supply installation component and a central control test bench component. It has the advantages of high integration, convenient operation and not being easily affected by human uncertainty. It can significantly reduce human errors and improve efficiency, solving the technical problems in the existing technology.

[0071] Furthermore, in this embodiment, an insulating layer or insulating member is provided between the two simulation rails 4 , and an insulating layer is provided on the lower side of each simulation rail 4 to ensure that the two simulation rails 4 are insulated.

[0072] Furthermore, the track insulation resistance online testing device 5 to be calibrated in this embodiment includes at least an induction coil 51 and a measuring instrument body 52. During the calibration process, the induction coil 51 is fixed at the gap between the two simulated tracks 4, and the measuring instrument body 52 is installed on the power supply installation component 3 and electrically connected to the central control test bench component 2, so that during the calibration test process, the measured resistance data can be output to the central control test bench component 2. In the central control test bench component 2, the measured resistance data can be compared with the calibrated resistance value actually provided by the resistance box component 1, so as to directly obtain the error value of the track insulation resistance online testing device 5 to be calibrated, and the operator calibrates the track insulation resistance online testing device 5 to be calibrated according to the error value.

[0073] Further, refer to Figure 2The resistor box assembly 1 may include a resistor box 11 and two fixing members 12; the fixing members 12 are respectively arranged on the rail bottoms 41 of the two simulated rails 4, and the resistor box 11 is installed on the upper ends of the fixing members 12. The resistor box 11 is fixed by the fixing members 12. During use, the fixing members 12 can also absorb mechanical impact. For example, when adjusting the calibrated resistance value of the resistor box 11, the resistance value drift caused by mechanical impact is prevented, thereby improving the accuracy of the calibration test; the resistor box 11 is electrically connected to the rail waists 42 of the two simulated rails 4 to provide a determined calibrated resistance value between the two simulated rails 4.

[0074] Furthermore, the resistance box 11 can be detachably mounted on the fixing part 12. During use, different resistance boxes can be adapted according to different calibration requirements. When the resistance box 11 is aged or fails, it can also be quickly disassembled and replaced, which has good expansion flexibility and maintenance convenience.

[0075] Furthermore, the resistance box 11 is a shift-type standard resistance box. During use, it can quickly and accurately provide the required calibrated resistance value through the characteristics of shifting, multiple gears, and high precision. Its operating efficiency, stability, and accuracy are much higher than those of conventional knob-switch type resistance boxes.

[0076] Optionally, refer to Figures 3 to 5 The track insulation resistance online test device calibration system of the present invention also includes a cabinet 6; a receiving cavity 61 is provided on the cabinet 6, and the resistance box assembly 1, the energy supply installation assembly 3 and the two simulated tracks 4 are all arranged in the receiving cavity 61; the central control test bench assembly 2 is arranged on the cabinet 6 outside the receiving cavity 61.

[0077] In this embodiment, the resistance box assembly 1, the energy supply installation assembly 3 and the two simulation rails 4 are accommodated by the cabinet 6 and the accommodating cavity 61, so as to avoid being easily disturbed by temperature, vibration and other surrounding environmental factors during external calibration; at the same time, the central control test bench assembly 2 is set on the cabinet 6, which is convenient for the operator to perform relevant adjustment operations.

[0078] Optionally, refer to Figure 4 and Figure 5 The track insulation resistance online test device calibration system of the present invention also includes a robotic arm assembly 7; the robotic arm assembly 7 is arranged in the accommodating cavity 61; the robotic arm assembly 7 is electrically connected to the central control test bench assembly 2, and is used to adjust the resistance box 11 to change the calibrated resistance value of the resistance box 11.

[0079] In this embodiment, the robotic arm assembly 7 is controlled by the central control test bench assembly 2, or a predetermined program is set by the central control test bench assembly 2 to control the robotic arm assembly 7, and the resistor box 11 is adjusted to perform automatic calibration resistance value adjustment, thereby avoiding precision errors caused by manual intervention and shortening the operation time of switching the calibration resistance value.

[0080] Furthermore, the robotic arm assembly 7 in this embodiment is a three-axis linear module robotic arm or a six-axis robotic arm.

[0081] Specifically, the robotic arm assembly 7 in this embodiment may be of model RM65.

[0082] Optionally, refer to Figure 2 and Figure 4 The energy supply installation assembly 3 in the present invention includes an energy supply seat 31 and two measurement connection blocks 32; the two measurement connection blocks 32 are respectively arranged on the treads 43 of the simulated track 4 and are electrically connected to the treads 43 of the simulated track 4; the energy supply seat 31 is arranged close to the simulated track 4, and is used to install the track insulation resistance online test device 5 to be calibrated, and to supply energy to the track insulation resistance online test device 5 to be calibrated, specifically, to install the measuring instrument body 52 of the track insulation resistance online test device 5 to be calibrated; the track insulation resistance online test device 5 to be calibrated is electrically connected to the two measurement connection blocks 32 respectively.

[0083] In this embodiment, two measurement connection blocks 32 are respectively welded on the tread 43 of the simulation track 4 and respectively connected to the measuring instrument body 52 to input the test electrical signal into the simulation track 4 and measure the resistance in combination with the induction coil 51.

[0084] Optionally, the track insulation resistance online test device calibration system of the present invention also includes a current detection device and a voltage detection device, and the voltage detection device and the current detection device are electrically connected to the two measurement connection blocks, and are used to detect and obtain the voltage and current on the two measurement connection blocks; a frequency detection device is provided in the energy supply seat 31, which is used to detect the actual output frequency of the track insulation resistance online test device 5 to be calibrated; the frequency detection device, the voltage detection device and the current detection device are all electrically connected to the central control test bench assembly 2.

[0085] In this embodiment, the voltage / current detection device is combined to verify the actual electrical parameters between the tracks in real time, and the frequency detection device monitors the output characteristics of the device under test, providing a multi-dimensional data verification benchmark for error analysis, avoiding single reliance on calibration values.

[0086] Furthermore, a high-precision voltmeter (such as KEYSIGHT 34465A) can be connected in parallel at the measurement connection block as a voltage detection device, and a current transformer can be connected in series as a current detection device; the built-in frequency meter (Agilet 53230A) of the energy supply seat 31 is connected to the signal output end of the device under test as a frequency detection device; all detection device data are summarized and electrically connected to the central control test bench component 2 via RS485.

[0087] Example 2

[0088] Second, see Figure 6 , shows a method for calibrating a track insulation resistance online test device in the present invention, which is used in the calibration system for the track insulation resistance online test device in Example 1, comprising the steps of:

[0089] S1: Installing the track insulation resistance online test device to be calibrated: Install the induction coil 51 and the measuring instrument body 52 of the track insulation resistance online test device to be calibrated 5, and electrically connect the measuring instrument body 52 to the two simulated tracks 4 and the central control test bench assembly 2 respectively, and start the central control test bench assembly 2;

[0090] S2: Setting calibration parameters: Input calibration parameters into the central control test bench assembly 2, and control the robotic arm 7 to adjust the resistance box assembly 1 and the measuring instrument body 52 so that the output parameter values of the resistance box assembly 1 and the measuring instrument body 52 meet the calibration parameters; the calibration parameters include at least the calibration resistance value;

[0091] S3: Perform test: Control the robotic arm 7 to start the measuring instrument body 52, obtain measurement values and test data, and input the measurement values and test data into the central control test bench component 2; the measurement values include the measured resistance value and the measured frequency value;

[0092] S4: Obtaining an error value: Using the central control test bench component 2, the error value of the track insulation resistance online test device 5 to be calibrated under the calibration parameters is obtained according to the calibration parameters, test data and measurement values, and is output and stored;

[0093] S5: Adjust calibration parameters: Adjust calibration parameters, repeat steps S2 to S4, perform multiple tests, and obtain error values of multiple tests;

[0094] S6: Calibration: Calibrate the track insulation resistance online testing device 5 to be calibrated according to the error values of multiple tests.

[0095] Optionally, the calibration parameters in step S2 include: the resistance value of the trackbed of the simulated track, the calibration signal frequency, signal low frequency and signal peak voltage output by the measuring instrument body 52, and the calibration resistance value output by the resistance box assembly.

[0096] Optionally, step S3 specifically includes:

[0097] S3.1: Control the robotic arm 7 to start the measuring instrument body 52 and output an electrical signal to the simulated track 4;

[0098] S3.2: Obtaining a measurement value through the induction coil 51 and the measuring instrument body 52;

[0099] S3.3: Detect the actual output frequency of the track insulation resistance online test device to be calibrated using a frequency detection device; obtain the actual voltage across the two measurement connection blocks 32 using a voltage detection device; and obtain the actual current flowing between the two measurement connection blocks 32 using a current detection device. The actual output frequency and the actual voltage and current across the two measurement connection blocks are used as test data.

[0100] S3.4: Input the measurements and test data into the central control test bench component.

[0101] Optionally, step S4 includes:

[0102] S4.1: In the central control test bench component 2, the actual output frequency is compared with the calibration frequency output by the measuring instrument body 52 to obtain a relative frequency deviation value;

[0103] S4.2: Analyze and obtain the actual resistance value between the two measurement connection blocks 32 based on the actual voltage and actual current in the test data;

[0104] S4.3: Compare the actual resistance value with the measured resistance value and analyze to obtain the resistance error value;

[0105] S4.4: The resistance error value and the relative frequency deviation value are used as the error value of the track insulation resistance online test device 5 to be calibrated under the calibration parameters, and are stored and output. The output interface refers to Figure 7 and Figure 9 .

[0106] Furthermore, the calibration parameters, actual voltage, actual current, actual output frequency and the calibrated frequency output by the measuring instrument body 52, relative frequency deviation, calibrated resistance / actual resistance, measured resistance value and resistance error value are displayed on the output interface to facilitate the operator to perform correction operations on the track insulation resistance online testing device based on the above data.

[0107] Furthermore, when obtaining the resistance error value, the resistance error value may be calculated by adopting the following method: resistance error value = (measured resistance value - actual resistance value) / actual resistance value × 100%.

[0108] Furthermore, you can also set the error range judgment, according to the resistance error value and relative frequency error obtained, and compare them with the set allowable error range. For example, if the calibration resistance value of the current test is above 120Ω, the error range is -10% to 10%. If the resistance error value obtained by the test exceeds this range, the resistance error value will be marked in red on the output interface. Figure 9 The relative frequency error is calculated in the same way, and the relative frequency error value = (calibration signal frequency - actual output frequency) / actual output frequency × 100%.

[0109] Furthermore, the error range set in the present invention is set according to the "Calibration Specifications for Track Insulation Measuring Instruments".

[0110] Optionally, step S1 specifically includes:

[0111] S1.1: Fix the induction coil 51 of the track insulation resistance online test device to be calibrated at the gap of the simulated track;

[0112] S1.2: Install the measuring instrument body 52 of the track insulation resistance online test device to be calibrated on the energy supply base 31, and electrically connect the measuring instrument body 52 and the induction coil 51;

[0113] S1.3: Electrically connect the measuring instrument body 52 and the central control test bench assembly, and start the central control test bench assembly.

[0114] In this embodiment, by integrating the resistance box component, the dual simulated track structure (simulating the actual track gap insulation state), the power supply installation component and the central control test bench component, and combining the robotic arm component and the voltage / current / frequency detection device, a highly automated and precise calibration system and method are constructed, which can perform parameter setting, test execution and error analysis throughout the entire process, significantly reducing human errors and improving efficiency; its unique simulated track and measurement connection block design ensures that the calibration environment highly restores the actual working conditions, making the results more engineering applicable; by real-time detection of the actual output frequency of the device to be tested, the actual voltage / current between the tracks, and multi-dimensional comparative analysis with the calibrated resistance value and the reading of the device to be tested (such as resistance error, relative frequency deviation), high-precision error tracing and analysis are achieved. The present invention can comprehensively evaluate the performance stability and error of the track insulation resistance online test device under different parameter settings, providing a strong calibration technical guarantee for the safe and reliable operation of the railway signal system.

[0115] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0116] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A track insulation resistance online test device calibration system, characterized in that: The track insulation resistance online test device calibration system comprises a resistance box component (1), a central control test bench component (2), an energy supply installation component (3) and two simulated tracks (4); The two simulation tracks (4) are arranged adjacent to each other and have a gap therebetween, so that the two simulation tracks (4) are in an insulated state; The resistance box assembly (1) spans the gap and is electrically connected to the two simulation tracks (4) respectively; The energy supply installation assembly (3) is arranged close to the simulated track (4) and is used for installing an on-line test device (5) for track insulation resistance to be calibrated; The central control test bench assembly (2) is electrically connected to the track insulation resistance online testing device (5) to be calibrated; The central control test bench component (2) is used to obtain the calibrated resistance value provided by the resistance box component (1) and the measured resistance value measured by the track insulation resistance online test device (5) to be calibrated, analyze and output the error value of the track insulation resistance online test device (5) to be calibrated, and perform calibration according to the error value.

2. The track insulation resistance online test device calibration system according to claim 1, characterized in that: The track insulation resistance online test device calibration system also includes a cabinet; The cabinet is provided with a receiving cavity, and the resistance box assembly (1), the energy supply installation assembly (3) and the two simulation rails (4) are all arranged in the receiving cavity; The central control test bench assembly (2) is arranged on the cabinet outside the accommodating cavity.

3. The track insulation resistance online test device calibration system according to claim 2, characterized in that: The track insulation resistance online test device calibration system also includes a mechanical arm assembly; The mechanical arm assembly is arranged in the accommodating cavity; The mechanical arm assembly is electrically connected to the central control test bench assembly (2) and is used to perform gear adjustment on the resistance box assembly (1) to change the calibrated resistance value provided by the resistance box assembly (1).

4. The track insulation resistance online test device calibration system according to claim 3, characterized in that: The energy supply installation assembly (3) comprises an energy supply seat (31) and two measurement connection blocks (32); Wherein, one of the measurement connection blocks (32) is correspondingly arranged on a tread (43) of the simulation track (4), and both are electrically connected to the tread (43) of the simulation track (4); The energy supply seat (31) is arranged close to the simulated track (4) and is used for installing the track insulation resistance online test device (5) to be calibrated and supplying energy to the track insulation resistance online test device (5) to be calibrated; The track insulation resistance online testing device (5) to be calibrated is electrically connected to the two measurement connection blocks (32) respectively.

5. The track insulation resistance online test device calibration system according to claim 4, characterized in that: The track insulation resistance online test device calibration system further comprises a current detection device and a voltage detection device, wherein the voltage detection device and the current detection device are both electrically connected to the two measurement connection blocks (32) and are used to detect and obtain the voltage and current on the two measurement connection blocks (32); A frequency detection device is provided in the energy supply seat (31) for detecting the actual output frequency of the track insulation resistance online test device (5) to be calibrated; The frequency detection device, the voltage detection device and the current detection device are all electrically connected to the central control test bench component (2).

6. A method for calibrating a track insulation resistance online test device, used in the track insulation resistance online test device calibration system according to claim 5, characterized in that: Including steps: S1: Installing the track insulation resistance online test device (5) to be calibrated: installing the induction coil (51) and the measuring instrument body (52) of the track insulation resistance online test device (5) to be calibrated, and electrically connecting the measuring instrument body (52) to the two simulated tracks (4) and the central control test bench assembly (2), and starting the central control test bench assembly (2); S2: Setting calibration parameters: inputting calibration parameters into the central control test bench component (2), controlling the mechanical arm to adjust the resistance box component (1) and the measuring instrument body (52), so that the output parameter values of the resistance box component (1) and the measuring instrument body (52) conform to the calibration parameters; S3: Performing a test: Controlling the robotic arm to start the measuring instrument body (52), obtaining measurement values and test data, and inputting the measurement values and test data into the central control test bench component (2); The measured values include the measured resistance value and the measured frequency value; S4: Obtaining an error value: using the central control test bench component (2), obtaining an error value of the track insulation resistance online test device (5) to be calibrated under the calibration parameters according to the calibration parameters, test data and measurement values, and outputting and storing the error value; S5: Adjust calibration parameters: Adjust calibration parameters, repeat steps S2 to S4, perform multiple tests, and obtain error values of multiple tests; S6: Calibrate: Calibrate the track insulation resistance online test device (5) to be calibrated based on the error values of multiple tests.

7. The method for calibrating a track insulation resistance online test device according to claim 6, characterized in that: The calibration parameters in step S2 include: the resistance value of the track bed of the simulated track (4), the calibration signal frequency, signal low frequency and signal peak voltage output by the measuring instrument body (52), and the calibration resistance value provided by the resistance box assembly (1).

8. The method for calibrating a track insulation resistance online test device according to claim 7, characterized in that: The step S3 specifically includes: S3.1: Control the robotic arm to start the measuring instrument body (52) and output an electrical signal to the simulated track (4); S3.2: Obtaining a measurement value through the induction coil (51) and the measuring instrument body (52); S3.3: Detecting the actual output frequency of the track insulation resistance online test device (5) to be calibrated by a frequency detection device; detecting and obtaining the actual voltage on the two measurement connection blocks (32) by a voltage detection device; detecting and obtaining the actual current flowing between the two measurement connection blocks (32) by a current detection device; and using the actual output frequency and the actual voltage and actual current on the two measurement connection blocks (32) as test data; S3.4: Input the measured values and test data into the central control test bench component (2).

9. The method for calibrating a track insulation resistance online test device according to claim 8, characterized in that: The step S4 includes: S4.1: In the control test bench component, the actual output frequency is compared with the calibration signal frequency output by the measuring instrument body (52) to obtain a relative frequency deviation value; S4.2: Analyze and obtain the actual resistance value between the two measurement connection blocks (32) based on the actual voltage and actual current in the test data; S4.3: Compare the actual resistance value with the measured resistance value and analyze to obtain the resistance error value; S4.4: The resistance error value and the relative frequency deviation value are used as the error value of the track insulation resistance online test device (5) to be calibrated under the calibration parameters, and are stored and output.

10. The method for calibrating a track insulation resistance online test device according to claim 9, characterized in that: The step S1 specifically includes: S1.1: Fix the induction coil (51) of the track insulation resistance online test device (5) to be calibrated at the gap of the simulated track (4); S1.2: Mount the measuring instrument body (52) of the track insulation resistance online test device (5) to be calibrated on the energy supply base (31), and electrically connect the measuring instrument body (52) and the induction coil (51); S1.3: Electrically connect the measuring instrument body (52) and the central control test bench assembly (2), and start the central control test bench assembly (2).

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