Insulation resistance measurement module of railway signal equipment electrical parameter measurement terminal

Abstract

The utility model discloses an insulation resistance measurement module of an electrical parameter measurement terminal of railway signal equipment, which comprises a signal processing module, a power management module, an equipment switch control module, a high voltage generation module, a current recovery module and a communication module, the power management module is electrically connected with the signal processing module, the equipment switch control module, the high-voltage generation module, the current recovery module and the communication module, the high-voltage generation module is electrically connected with the signal processing module, the current recovery module is electrically connected with the high-voltage generation module, and the current recovery module is electrically connected with the signal processing module. The communication module is electrically connected with the signal processing module. Compared with the prior art, the railway signal equipment monitoring system has remarkable advantages in the aspects of function richness, portability, integration, data management and analysis, user friendliness, communication function and the like, and is beneficial to improving the maintenance efficiency and operation safety of railway signal equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of insulation resistance measurement of railway signal equipment measurement terminals, in particular to an insulation resistance measurement module of an electrical parameter measurement terminal of railway signal equipment. Background Art

[0002] The majority of operational faults in railway signaling systems are caused by faults in turnouts and track circuits. Track circuit faults are primarily caused by insulation damage, trackbed leakage (reduced track circuit impedance), and poor contact in plugged-in splices. During routine maintenance of railway signaling equipment, determining track insulation performance requires disconnecting the equipment circuit for measurement, rather than using a multimeter or megohmmeter to measure it directly online.

[0003] Currently, the insulation resistance measuring instrument used for railway signals generally uses a megohmmeter. This instrument is heavy, bulky, and has a single function. It is not easy to carry and cannot meet the diverse testing needs of railway signal equipment. The on-site work efficiency is low. Utility Model Content

[0004] The purpose of the present utility model is to address the above-mentioned problems and provide an insulation resistance measurement module for an electrical parameter measurement terminal of railway signal equipment, which has significant advantages over existing technologies in terms of functional richness, portability, integrated integration, data management and analysis, user-friendliness and communication functions, and helps to improve the maintenance efficiency and operational safety of railway signal equipment.

[0005] In order to achieve the above-mentioned purpose of the utility model, the technical solution adopted by the utility model is as follows:

[0006] According to one aspect of the present invention, an insulation resistance measurement module for a railway signaling equipment electrical parameter measurement terminal is provided, comprising a signal processing module, a power management module, an equipment switch control module, a high voltage generation module, a current recovery module, and a communication module;

[0007] The power management module is electrically connected to the signal processing module, the device switch control module, the high voltage generation module, the current recovery module and the communication module respectively;

[0008] The high voltage generating module is electrically connected to the signal processing module;

[0009] The current recovery module is electrically connected to the high voltage generation module, and the current recovery module is electrically connected to the signal processing module;

[0010] The communication module is electrically connected to the signal processing module.

[0011] Preferably, the signal processing module includes a DSP processor, and the DSP processor is used to collect data and process the data.

[0012] Preferably, the power management module includes a battery management circuit, a lithium battery, a filter, a voltage regulator and a power supply voltage acquisition circuit. The power management circuit, the lithium battery, the filter, the voltage regulator and the power supply voltage acquisition circuit are electrically connected in sequence. The power supply voltage acquisition circuit is electrically connected to the signal processing module, and the voltage regulator is electrically connected to the device switch control module.

[0013] Preferably, a charging acquisition module is further included, and the charging acquisition module includes a charging current acquisition circuit and a charging voltage acquisition circuit, and the charging current acquisition circuit and the charging voltage acquisition circuit are electrically connected to the battery management circuit respectively.

[0014] Preferably, the device switch control module includes a power-off MOS tube and a button, the power-off MOS tube is electrically connected to the voltage regulator, and the button is electrically connected to the power-off MOS tube.

[0015] Preferably, the high-voltage generating module includes a PWM generator, a gate driver, a voltage inverter, a bidirectional filter and a high-voltage output circuit. The PWM generator, the gate driver, the voltage inverter, the bidirectional filter and the high-voltage output circuit are electrically connected in sequence. The PWM generator is electrically connected to the signal processing module, and the high-voltage output circuit is electrically connected to the current recovery module.

[0016] Preferably, the current recovery module includes a shunt circuit, a sampling resistor array, a voltage divider and an ADC voltage acquisition circuit. The shunt circuit, the sampling resistor array, the voltage divider and the ADC voltage acquisition circuit are electrically connected in sequence. The shunt circuit is electrically connected to the high-voltage output circuit, and the ADC voltage acquisition circuit is electrically connected to the signal processing module.

[0017] Preferably, the communication module includes a Bluetooth module, and the Bluetooth module is electrically connected to the signal processing module.

[0018] Preferably, a flash buzzer is further included, and the flash buzzer is electrically connected to the signal processing module.

[0019] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0020] The utility model integrates multiple modules into one, which meets the diverse testing needs of railway signal equipment while being highly integrated, avoiding the tediousness and cost of using multiple independent instruments, improving testing efficiency, and miniaturizing the terminal for portability, making it convenient for on-site staff to carry out fast and efficient equipment testing and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural diagram of the utility model. DETAILED DESCRIPTION

[0022] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described below with reference to the accompanying drawings and preferred embodiments. However, it should be noted that many of the details listed in this specification are merely provided to help the reader gain a thorough understanding of one or more aspects of the present invention, and these aspects of the present invention can be implemented even without these specific details.

[0023] See also Figure 1 The utility model provides an insulation resistance measurement module for an electrical parameter measurement terminal of railway signaling equipment. The technical solution is as follows:

[0024] An insulation resistance measurement module for a railway signaling equipment electrical parameter measurement terminal includes a signal processing module, a communication module, a high-voltage generation module, a current recovery module, a power management module, and an equipment switch control module. The signal processing module includes a DSP processor, which is responsible for controlling and managing the entire system, primarily collecting and processing data. The DSP processor is the core of the entire system, responsible for controlling and managing the operations of each functional room. The specific steps for implementing data processing by the DSP processor are as follows:

[0025] (1) Initialization: After the system is powered on, the DSP processor initializes each functional room, including setting registers, configuring the interrupt vector table, etc.

[0026] (2) Task scheduling: The DSP processor schedules the execution of programs in each functional room according to the preset task priority.

[0027] (3) Data acquisition and processing: The DSP processor receives data from each functional room and performs real-time processing and analysis.

[0028] (4) Control output: Based on the processing results, the DSP processor sends control signals to each functional room, such as adjusting the output voltage of the high-voltage generator, controlling the device switch, etc.

[0029] The power management module is electrically connected to the DSP processor, and the power management module is responsible for lithium battery charging management. The power management module is electrically connected to the DSP processor, communication module, high-voltage generation module, current recovery module and equipment switch control module respectively, providing a stable power supply for each module. The power management module includes a charging acquisition module, a battery management circuit, a lithium battery, a filter, a voltage regulator and a power supply voltage acquisition circuit. The charging acquisition module includes a charging current acquisition circuit and a charging voltage acquisition circuit, and the charging current acquisition circuit and the charging voltage acquisition circuit are electrically connected to the battery management circuit respectively. The power management circuit, lithium battery, filter, voltage regulator and power supply voltage acquisition circuit are electrically connected in sequence. The power supply voltage acquisition circuit is electrically connected to the DSP processor, and the voltage regulator is electrically connected to the equipment switch control module. The power management module is responsible for providing a stable power supply for the entire system. The specific implementation steps are as follows:

[0030] (1) Lithium battery charging management: monitor the power status of the lithium battery and control charging as needed to ensure battery health.

[0031] (2) Power supply filtering: Filter the input power to eliminate noise interference.

[0032] (3) Power supply regulated output: Provides stable output voltage according to system requirements.

[0033] The voltage regulator is electrically connected to the device switch control module, which is connected to the DSP processor, power management, and high-voltage generator to achieve power-on and power-off control of the device. The device switch control module includes a power-off MOSFET and a button. The power-off MOSFET is electrically connected to the voltage regulator. The output of the power-off MOSFET is the operating voltage output. The button is electrically connected to the power-off MOSFET. The specific implementation steps are as follows:

[0034] (1) Button detection: Real-time detection of user operations, such as pressing the power-on or power-off button.

[0035] (2) Control signal generation: Generate corresponding control signals, such as high level or low level, based on the key detection results.

[0036] (3) Control the high-voltage generator: Send the control signal to the high-voltage generator to power on or off the equipment.

[0037] The high-voltage generating module includes a PWM generator, a gate driver, a voltage inverter, a bidirectional filter, and a high-voltage output circuit. The PWM generator, the gate driver, the voltage inverter, the bidirectional filter, and the high-voltage output circuit are electrically connected in sequence. The PWM generator is electrically connected to the DSP processor, and the high-voltage output circuit is electrically connected to the current recovery module. The high-voltage generator is connected to the DSP processor, the output of the power-off MOS tube, and the current recovery module, and generates a corresponding high-voltage output according to the control signal of the DSP processor. The inverter is driven by PWM to generate high voltages of 500VDC and 1000VDC. The high-voltage generating module is responsible for generating high-voltage output for insulation resistance measurement. The specific implementation steps are as follows:

[0038] (1) PWM signal generation: Generate the corresponding PWM signal according to the control signal of the DSP processor.

[0039] (2) Driving the inverter: The PWM signal drives the inverter and converts it into a high-frequency AC voltage.

[0040] (3) Boosting and rectification: The required high voltage output is obtained through transformer boosting and high-frequency rectification.

[0041] The high voltage generated by the high voltage generation module is introduced into the current recovery module. The current recovery module is connected to the high voltage generation module and the DSP processor to convert the sampled current signal into a voltage signal for the DSP processor to calculate the insulation resistance value. Specifically, the current recovery module includes a shunt circuit, a sampling resistor array, a voltage divider and an ADC voltage acquisition circuit. The shunt circuit, the sampling resistor array, the voltage divider and the ADC voltage acquisition circuit are electrically connected in sequence. The shunt circuit is electrically connected to the high voltage output circuit, and the ADC voltage acquisition circuit is electrically connected to the DSP processor. The current of the high voltage output circuit is recovered, and the voltage value obtained after the sampling resistor and voltage division is transmitted to the DSP processor. The specific implementation steps are as follows:

[0042] (1) Sampling resistor selection: Select a suitable sampling resistor to ensure that the current signal is not distorted when converted into a voltage signal.

[0043] (2) Voltage division processing: The voltage across the sampling resistor is divided by a voltage divider to obtain a voltage signal suitable for processing by the DSP processor.

[0044] (3) Signal conditioning: Filtering, amplifying and other conditioning measures are performed on the voltage signal after voltage division to meet the input requirements of the DSP processor.

[0045] (4) Data transmission: The conditioned current signal is transmitted to the DSP processor for insulation resistance calculation.

[0046] The DSP processor communicates with the terminal via a communication module. Specifically, the communication module includes a Bluetooth module, which is electrically connected to the DSP processor and externally connected to the integrated railway signaling equipment electrical parameter measurement terminal. The Bluetooth module completes data transmission between the DSP processor and the terminal. The specific implementation steps are as follows:

[0047] (1) Establish connection: The DSP processor establishes a Bluetooth connection with the terminal to ensure smooth data transmission channel.

[0048] (2) Data transmission: Send the data processed by the DSP processor to the terminal, such as insulation resistance value, status information, etc.

[0049] (3) Data reception: The DSP processor receives control instructions from the terminal, such as modifying parameter settings.

[0050] In order to provide a reminder to the staff, in this embodiment, a flash buzzer is also included, which is electrically connected to the signal processing module and can provide a warning signal.

[0051] The action process or operation steps of the utility model are as follows:

[0052] (1) Power-on self-test: After the system is started, it automatically performs a hardware self-test to ensure that each module is working properly.

[0053] (2) Parameter setting: The user inputs or selects the parameter type and range to be measured through the touch screen.

[0054] (3) Signal acquisition: According to the set parameter type, the signal acquisition module collects the corresponding signal parameters in real time.

[0055] (4) Insulation resistance measurement: The current sampling module measures the insulation resistance of the device under test. The specific operation steps are as follows: a. The high-voltage generator generates a high-voltage output; b. The high-voltage output passes through the device under test and the sampling resistor; c. The measurement amplifier measures the voltage value on the sampling resistor; d. The main controller calculates the insulation resistance value of the device under test according to Ohm's law.

[0056] (5) Data processing and display: The DSP processor processes the collected data in real time and displays the results on the touch screen.

[0057] (6) Data storage: The measurement results are stored in the data storage module for subsequent query and analysis.

[0058] (7) Communication upload: The measurement results are uploaded to the host computer through the communication interface to facilitate remote monitoring and management.

[0059] (8) Generate equipment insulation resistance cycle curve: Combined with the data of the device manager, generate the insulation life cycle curve of the tested equipment to help detect early insulation faults.

[0060] Among them, the insulation resistance measurement process mainly involves the following parameters:

[0061] (1) Measurement voltage: According to actual needs, the measurement voltage can be selected as 500VDC or 1000VDC.

[0062] (2) Measuring current: The current value during the measurement process is usually small, generally in the microampere level.

[0063] (3) Measurement time: In order to ensure the accuracy of the measurement results, the measurement time should be long enough, usually several minutes to more than ten minutes.

[0064] (4) Insulation resistance: According to Ohm's law, the insulation resistance is equal to the measured voltage divided by the measured current.

[0065] To generate the measurement voltages of 500 VDC and 1000 VDC, the measurement voltage generation method is as follows:

[0066] (1) Using a high-voltage generator: A high-voltage generator is a device that produces a stable high-voltage output. The required measurement voltage can be generated by adjusting its output voltage. In this embodiment, the high-voltage generator uses the principle of a switching power supply and adjusts the duty cycle of the switching tube to achieve output voltage regulation.

[0067] (2) Voltage Multiplier: For generating lower voltages, a voltage multiplier circuit is used. The voltage multiplier generates the required high DC voltage by doubling the input AC voltage and rectifying it. For example, a 220VAC input passing through a voltage multiplier circuit produces an output of approximately 1000VDC. This output is then reduced to 500VDC by a step-down circuit.

[0068] (3) Voltage divider circuit: To obtain a smaller measurement voltage, a voltage divider circuit is used. The output voltage of the high-voltage generator is divided by a voltage divider to obtain the required measurement voltage. For example, a 1000VDC output voltage can be passed through a 1:2 voltage divider to obtain a 500VDC measurement voltage.

[0069] This utility model integrates multiple measurement functions, including frequency-shift signals, single-frequency signals, DC signals, and high-voltage pulses, to meet the diverse testing requirements of various railway signaling equipment. It also features insulation resistance measurement. A frequency signal is applied to the track, and the impedance value is calculated by analyzing the frequency and amplitude of the feedback signal. This allows for online measurement of track insulation impedance, high-frequency impedance, and low-frequency impedance. High-voltage insulation resistance is measured using a high-voltage method (500VDC or 1000VDC). Each measurement stores the insulation results and, when combined with the device manager under test, generates an insulation lifecycle curve for the device, helping to identify early-stage insulation failures.

[0070] The utility model has the following technical effects:

[0071] Rich functions: Compared with traditional insulation testers, this application has multiple measurement functions such as frequency shift signal, single frequency signal, DC signal, high voltage pulse, etc. in addition to insulation resistance measurement, which meets the diverse testing needs of railway signal equipment.

[0072] Portability: The measurement terminal of this application is small in size and light in weight, easy to carry, and convenient for on-site staff to carry out fast and efficient equipment detection and maintenance.

[0073] All-in-one integration: This application integrates the insulation resistance measurement function with other signal measurement functions, avoiding the tediousness and cost of using multiple independent instruments and improving test efficiency.

[0074] Data Management and Analysis: The measurement terminal in this application has a data storage function, which allows for easy query and export of measurement results. By integrating with the device manager, it can generate a periodic curve of the device insulation resistance, helping to detect early insulation faults and improve equipment operation safety.

[0075] In summary, the present invention has significant advantages over existing technologies in terms of functionality, portability, integrated integration, data management and analysis, user friendliness, and communication functions, and is conducive to improving the maintenance efficiency and operational safety of railway signaling equipment.

[0076] Through the above detailed description, it can be seen that the specific implementation method of the present application in high-voltage insulation resistance measurement. In practical applications, appropriate high-voltage generators and voltage divider circuits can be selected according to actual needs to meet the needs of different measurement voltages.

[0077] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. An insulation resistance measurement module for an electrical parameter measurement terminal of railway signaling equipment, characterized in that: It includes signal processing module, power management module, equipment switch control module, high voltage generation module, current recovery module and communication module; The power management module is electrically connected to the signal processing module, the device switch control module, the high voltage generation module, the current recovery module and the communication module respectively; The high voltage generating module is electrically connected to the signal processing module; The current recovery module is electrically connected to the high voltage generation module, and the current recovery module is electrically connected to the signal processing module; The communication module is electrically connected to the signal processing module.

2. The insulation resistance measurement module of a railway signaling equipment electrical parameter measurement terminal according to claim 1, characterized in that: The signal processing module includes a DSP processor, and the DSP processor is used to collect data and process the data.

3. The insulation resistance measurement module of a railway signaling equipment electrical parameter measurement terminal according to claim 1, characterized in that: The power management module includes a battery management circuit, a lithium battery, a filter, a voltage regulator and a power supply voltage acquisition circuit. The power management module, the lithium battery, the filter, the voltage regulator and the power supply voltage acquisition circuit are electrically connected in sequence. The power supply voltage acquisition circuit is electrically connected to the signal processing module, and the voltage regulator is electrically connected to the device switch control module.

4. The insulation resistance measurement module of a railway signaling equipment electrical parameter measurement terminal according to claim 3, characterized in that: It also includes a charging acquisition module, which includes a charging current acquisition circuit and a charging voltage acquisition circuit. The charging current acquisition circuit and the charging voltage acquisition circuit are electrically connected to the battery management circuit respectively.

5. The insulation resistance measurement module of a railway signaling equipment electrical parameter measurement terminal according to claim 3, characterized in that: The device switch control module includes a power-off MOS tube and a button. The power-off MOS tube is electrically connected to the voltage regulator, and the button is electrically connected to the power-off MOS tube.

6. The insulation resistance measurement module of a railway signaling equipment electrical parameter measurement terminal according to claim 1, characterized in that: The high-voltage generating module includes a PWM generator, a gate driver, a voltage inverter, a bidirectional filter and a high-voltage output circuit. The PWM generator, the gate driver, the voltage inverter, the bidirectional filter and the high-voltage output circuit are electrically connected in sequence. The PWM generator is electrically connected to the signal processing module, and the high-voltage output circuit is electrically connected to the current recovery module.

7. The insulation resistance measurement module of a railway signaling equipment electrical parameter measurement terminal according to claim 6, characterized in that: The current recovery module includes a shunt circuit, a sampling resistor array, a voltage divider and an ADC voltage acquisition circuit. The shunt circuit, the sampling resistor array, the voltage divider and the ADC voltage acquisition circuit are electrically connected in sequence. The shunt circuit is electrically connected to the high-voltage output circuit, and the ADC voltage acquisition circuit is electrically connected to the signal processing module.

8. The insulation resistance measurement module of a railway signaling equipment electrical parameter measurement terminal according to claim 1, characterized in that: The communication module includes a Bluetooth module, and the Bluetooth module is electrically connected to the signal processing module.

9. The insulation resistance measurement module of a railway signaling equipment electrical parameter measurement terminal according to claim 1, characterized in that: It also includes a flash buzzer, which is electrically connected to the signal processing module.

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