Comprehensive calibration instrument for host simulation test equipment of train and rail car operation monitoring device

Abstract

The utility model provides a comprehensive calibrator for host simulation test equipment of a train and rail car operation monitoring device, and belongs to the technical field of railway equipment measurement. The problems of high test specialty, low efficiency and the like of a calibration platform built by adopting a general standard device during use are solved; comprising a shell, a touch display screen is arranged on the front face of the shell, a power switch, a power interface, an LKJ test equipment interface and a GYK test equipment interface are arranged on the back face of the shell, and a comprehensive calibrator is connected with LKJ test equipment and GYK test equipment through the LKJ test equipment interface and the GYK test equipment interface respectively; a power supply module, a host, a standard signal generator and a signal amplifier are arranged in the shell, a test circuit board is installed in the host, and a signal preprocessing module, an AD sampling module and a DSP signal processing module are integrated on the test circuit board; the calibration device is applied to calibration measurement of LKJ and GYK test equipment.

Description

Technical Field

[0001] This utility model provides a comprehensive calibration instrument for the host simulation test equipment of train and railcar operation monitoring devices, belonging to the field of railway equipment measurement technology. Background Technology

[0002] Currently, railway trains and track vehicles are equipped with train operation control equipment (LKJ equipment) and track vehicle operation control equipment (GYK equipment), respectively. However, existing LKJ equipment testing instruments are only used to simulate the various test items of the LKJ main unit and lack metrological traceability requirements for the GYK main unit. Although the scheme of building a calibration platform using multiple standard instruments such as digital storage oscilloscopes, general-purpose counters, digital multimeters, and AC / DC meter calibrators can simultaneously perform metrological traceability for both LKJ and GYK testing equipment, it still has significant drawbacks, mainly in the following aspects:

[0003] (1) Using a universal multi-standard instrument for metrological traceability requires manual recording of data and calculation of errors, which is not only very tedious but also prone to errors. The preservation of test data is also a major problem.

[0004] (2) Setting up a universal standard calibration platform for testing requires a high level of professional skills and expertise from the operators. It is difficult for general operators to complete this task.

[0005] (3) Using this method for metrological traceability is very inefficient. For each parameter measured, a different standard must be replaced and reconnected.

[0006] (4) The calibration of LKJ / GYK host test equipment often needs to be carried out on-site. The method of using general standard instruments cannot meet the needs of on-site testing, which affects the implementation of metrology work. Utility Model Content

[0007] To address the issues of high testing specialization and low efficiency in calibration platforms built using general-purpose standard instruments, this invention proposes a comprehensive calibrator for the host simulation test of train and railcar operation monitoring devices. The aim is to improve the circuitry and structure of the original LKJ comprehensive calibrator, thereby enabling the simultaneous simulation testing of LKJ and GYK devices using a single calibrator.

[0008] The technical solution adopted by this utility model is as follows: a comprehensive calibrator for a train and railcar operation monitoring device host simulation test equipment, including a housing, a touch screen is provided on the front of the housing, and a power switch, a power interface, an LKJ test equipment interface, and a GYK test equipment interface are provided on the back of the housing. The comprehensive calibrator is connected to the LKJ test equipment and the GYK test equipment through the LKJ test equipment interface and the GYK test equipment interface, respectively.

[0009] The housing contains a power module, a main unit, a standard signal generator, and a signal amplifier. The main unit contains a test circuit board, which integrates a signal preprocessing module, an AD sampling module, and a DSP signal processing module. The input of the signal preprocessing module is connected to the analog signals input from the LKJ test equipment and the GYK test equipment. The output of the signal preprocessing module is connected to the AD sampling module and then to the DSP signal processing module. The output of the DSP signal processing module transmits the data to the touch screen.

[0010] The LKJ testing equipment is equipped with an LKJ measurement module, and the GYK testing equipment is equipped with a GYK measurement module. Both the LKJ and GYK measurement modules include a locomotive speed signal generation circuit, a diesel engine speed signal generation circuit, a train air duct pressure generation circuit, and a locomotive signal generation circuit. The GYK measurement module also includes a GYK simulated track signal measurement module.

[0011] Furthermore, the test circuit board is a high-speed PCB circuit board.

[0012] Furthermore, the host also integrates a storage module, which is used to record and store the test data of each test item.

[0013] Furthermore, the front of the housing is also provided with a USB port for connecting an external keyboard and mouse.

[0014] Furthermore, a cooling fan vent is also provided on the back of the housing.

[0015] Furthermore, the GYK simulated track signal measurement module is used to simulate GYK track operation signals and send simulated GYK track signals to the host through GYK testing equipment.

[0016] The advantages of this utility model over the prior art are as follows:

[0017] 1. Multifunctional integration: It integrates multiple standard devices such as frequency counter, standard signal generator, standard digital voltmeter, and digital ammeter into one unit to realize metrological traceability of LKJ and GYK test equipment.

[0018] 2. High-precision measurement: By adopting high-speed sampling and processing technology, the measurement accuracy of key parameters such as simulated locomotive speed, diesel engine speed, and train pipe pressure has been improved.

[0019] 3. Application of key technologies: Fast Fourier Transform (FFT) technology was used for high-frequency signal processing, and a digital signal processor (DSP) was used to process GYK track signals, which improved the accuracy and efficiency of signal processing. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings:

[0021] Figure 1 This is a schematic diagram of the GYK measurement module.

[0022] Figure 2 This is a schematic diagram of the front structure of the calibrator of this utility model;

[0023] Figure 3 This is a schematic diagram of the backplate structure of the calibrator of this utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the inner bottom plate of the calibrator of this utility model;

[0025] Figure 5 The circuit schematic for signal processing and AD sampling;

[0026] Figure 6 This is the circuit schematic of a signal amplifier;

[0027] Figure 7 Flowchart of signal processing after inputting signals from LKJ and GYK testing equipment to the integrated calibrator;

[0028] Figure 8 This is a block diagram for signal generation in the dual-needle drive input circuit. Detailed Implementation

[0029] like Figures 1 to 8 As shown, this utility model provides a comprehensive calibrator for the host simulation test equipment of a train and railcar operation monitoring device. It can perform parameter testing on both LKJ and GYK measuring devices. Most of the parameter test signals for the two measuring devices are the same or similar, therefore, they are basically completed using the same signal processing circuit. Since the simulated track signal part of GYK differs from that of LKJ, a GYK simulated track signal measurement module is added.

[0030] This utility model's integrated calibrator includes a housing. The front of the housing has a touchscreen display and two USB ports; the other USB port can connect to an external keyboard and mouse. The back of the housing has a power switch, a power interface, an LKJ testing device interface, a GYK testing device interface, and a cooling fan vent. A nameplate is also located on the back of the housing. The calibrator connects to an LKJ testing device and a GYK testing device via the LKJ testing device interface and the GYK testing device interface, respectively.

[0031] The housing contains a power module, a main unit, a frequency counter, a standard signal generator, a standard voltmeter, a standard ammeter, and a signal amplifier. The main unit houses a test circuit board, which integrates a signal preprocessing module, an AD sampling module, and a DSP signal processing module.

[0032] The LKJ and GYK testing equipment each contain an LKJ measurement module and a GYK measurement module. Both modules include circuits for generating locomotive speed signals, diesel engine speed signals, train duct pressure signals, and locomotive signals. The locomotive speed signal generation circuit simulates the photoelectric speed sensor on the train and railcar, sending a simulated locomotive speed signal (typically a square wave pulse signal) to the host computer via the LKJ and GYK testing equipment. The diesel engine speed signal generation circuit simulates the diesel engine tachometer on the train and railcar, sending a simulated diesel engine speed signal to the host computer via the LKJ and GYK testing equipment. The train duct pressure generation circuit simulates the duct pressure sensor on the locomotive and railcar, sending a simulated duct pressure electrical signal to the host computer via the LKJ and GYK testing equipment. The locomotive signal generation circuit simulates locomotive signals, sending simulated locomotive operation signals via the LKJ testing equipment.

[0033] The GYK measurement module is also equipped with a GYK simulated track signal measurement module to simulate GYK track operation signals. The simulated GYK track signals (including standard 25Hz AC counter, 50Hz AC counter, domestic frequency shift, and ZPW-2000 series track signals) are sent to the host through the GYK test equipment.

[0034] The test circuit board utilizes a high-speed PCB. The locomotive speed signal, diesel engine speed signal, duct pressure signal, and GYK track signal are all part of this high-speed PCB. Upon signal input, the signal preprocessing circuit amplifies and processes the signal, while a standard voltmeter corrects the signal. The processed signal is then converted from analog to digital by an AD sampling module, and further processed by a DSP signal processing module using a Fast Fourier Transform. At this point, a frequency counter intervenes to perform final signal calibration. Finally, the correctly calibrated signal is processed and sent to the host computer. The locomotive operation signal, being a digital quantity, is directly processed by the DSP signal processing module using a Fast Fourier Transform after input, followed by final calibration by a frequency counter. Finally, the correctly calibrated signal is processed and sent to the host computer.

[0035] The test circuit board of this invention also integrates a dual-needle meter drive input circuit. The signal of the dual-needle meter drive input circuit is generated by the host controlling the standard signal generator to produce the required DC current signal, which is then amplified by the signal amplifier, and finally sent to the LKJ test equipment and GYK test equipment after synchronous correction by the standard ammeter.

[0036] The host unit of this invention also integrates a storage module for recording and storing test data for each test item. Furthermore, the host unit embeds calibration software and testing software. The calibration software calibrates the integrated calibrator itself, while the testing software meets the calibration and testing requirements for LKJ and GYK testing equipment. To facilitate subsequent data processing and export, an open database is provided, compatible with commonly used software for calling and editing, enabling the management of test data and achieving functions such as modification, querying, retrieval, and automatic generation of calibration reports.

[0037] Regarding the specific structure of this utility model, it should be noted that the connection relationships between the various component modules adopted in this utility model are definite and achievable. Except as specifically described in the embodiments, their specific connection relationships can bring about corresponding technical effects and solve the technical problems proposed by this utility model without relying on the execution of corresponding software programs. The models of the components, modules, and specific components appearing in this utility model, the connection methods between them, and the conventional usage methods and expected technical effects brought about by the above-mentioned technical features, unless specifically described, are all publicly disclosed content in patents, journal articles, technical manuals, technical dictionaries, and textbooks that can be obtained by those skilled in the art before the application date, or belong to conventional technology, common knowledge, and other existing technologies in this field. There is no need to elaborate, which makes the technical solution provided in this case clear, complete, and achievable, and can reproduce or obtain corresponding physical products based on this technical means.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A comprehensive calibration instrument for the host simulation test equipment of a train and railcar operation monitoring device, characterized in that: The device includes a housing with a touch screen on the front and a power switch, a power interface, an LKJ test equipment interface, and a GYK test equipment interface on the back. The integrated calibrator connects to the LKJ test equipment and the GYK test equipment respectively through the LKJ test equipment interface and the GYK test equipment interface. The housing contains a power module, a main unit, a standard signal generator, and a signal amplifier. The main unit contains a test circuit board, which integrates a signal preprocessing module, an AD sampling module, and a DSP signal processing module. The input of the signal preprocessing module is connected to the analog signals input from the LKJ test equipment and the GYK test equipment. The output of the signal preprocessing module is connected to the AD sampling module and then to the DSP signal processing module. The output of the DSP signal processing module transmits the data to the touch screen. The LKJ testing equipment is equipped with an LKJ measurement module, and the GYK testing equipment is equipped with a GYK measurement module.

2. The comprehensive calibration instrument for the host simulation test equipment of a train and railcar operation monitoring device according to claim 1, characterized in that: The test circuit board is a high-speed PCB circuit board.

3. The comprehensive calibration instrument for the host simulation test equipment of a train and railcar operation monitoring device according to claim 1, characterized in that: The host also integrates a storage module, which is used to record and store the test data of each test item.

4. The comprehensive calibration instrument for the host simulation test equipment of a train and railcar operation monitoring device according to claim 1, characterized in that: The front of the housing also has a USB port for connecting an external keyboard and mouse.

5. The comprehensive calibration instrument for the host simulation test equipment of a train and railcar operation monitoring device according to claim 1, characterized in that: The back of the housing is also provided with a cooling fan vent.

6. The comprehensive calibration instrument for the host simulation test equipment of a train and railcar operation monitoring device according to claim 1, characterized in that: The GYK simulated track signal measurement module is used to simulate GYK track operation signals and send simulated GYK track signals to the host through GYK testing equipment.

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