Noise and vibration cooperative diagnostic instrument

Abstract

The utility model discloses a noise and vibration collaborative diagnostic instrument, which relates to the field of train operation and maintenance safety guarantee and comprises a case, and a power panel, a digital board, a power module, a noise and vibration signal processing module, a sound and vibration collaborative diagnostic module, an Ethernet communication module and an Ethernet interface circuit which are arranged in the case, the primary power conversion circuit and the Ethernet interface circuit are arranged on the power panel, and the secondary power conversion circuit, the noise and vibration signal processing module, the noise diagnosis module and the communication module are arranged on the digital board. Through high-integration design, power conversion, data acquisition and communication are integrated in one instrument, so that the reason of noise generation of a diagnosis object is determined according to a noise signal and a vibration signal; functions such as power supply for circuits in the diagnostic instrument, acquisition of noise signals and vibration signals, communication between the noise and vibration cooperative diagnostic instrument and external equipment and the like are integrated, and requirements on integration level, cost and the like of the noise and vibration cooperative diagnostic instrument are met.

Description

Technical Field

[0001] The utility model relates to the field of train operation and maintenance safety assurance, in particular to a noise and vibration collaborative diagnostic instrument. Background Art

[0002] During the operation of rail trains, some sections of rail trains have the problem of high noise inside the car, and even the noise inside some sections has affected the normal communication of passengers and caused discomfort. In response to the above noise problem, there is currently a method to find the cause of the high noise in rail trains through noise and vibration collaborative diagnosis methods. However, during the hardware design process, the noise and vibration collaborative diagnosis instrument has complex functions and many devices, so its size is relatively large and cannot meet the needs of being used in a small space on the vehicle. Therefore, due to the limited space in the rail train and the consideration of cost and hardware resource utilization, it is urgent to design a noise and vibration collaborative diagnosis instrument with small size, high economy and integrated noise and vibration signal processing functions. Utility Model Content

[0003] The purpose of the utility model is to provide a noise and vibration collaborative diagnostic instrument. On the basis of realizing the determination of the cause of noise generated by the diagnosis object according to the noise signal and the vibration signal, multiple functions are integrated, such as power supply for various circuits in the noise and vibration collaborative diagnostic instrument, acquisition of noise signals, acquisition of vibration signals, communication between the noise and vibration collaborative diagnostic instrument and external equipment, so as to meet the requirements on the integration level, cost and other aspects of the noise and vibration collaborative diagnostic instrument.

[0004] In order to solve the above technical problems, the utility model provides a noise and vibration collaborative diagnosis instrument, including a chassis, and a power board, a digital board, a power module, a noise and vibration signal processing module, a sound and vibration collaborative diagnosis module, an Ethernet communication module and an Ethernet interface circuit all arranged in the chassis;

[0005] The power supply module includes a primary power conversion circuit and a secondary power conversion circuit, the input end of the primary power conversion circuit is connected to an external input power supply, the step-down output end of the primary power conversion circuit is connected to the input end of the secondary power conversion circuit, and the step-down output end of the secondary power conversion circuit is connected to the power supply end of the noise and vibration signal processing module, the power supply end of the sound-vibration collaborative diagnosis module, and the power supply end of the Ethernet communication module;

[0006] The signal input end of the noise and vibration signal processing module is used to input the noise signal of the diagnosis object and the vibration signal of the diagnosis object, the preprocessing signal output end of the noise and vibration signal processing module is connected to the input end of the sound-vibration collaborative diagnosis module, the diagnosis result output end of the sound-vibration collaborative diagnosis module is connected to the input end of the Ethernet communication module, and the output end of the Ethernet communication module is connected to the external device through the Ethernet interface circuit;

[0007] The primary power conversion circuit and the Ethernet interface circuit are both arranged on the power board, and the secondary power conversion circuit, the noise and vibration signal processing module, the sound and vibration collaborative diagnosis module and the Ethernet communication module are all arranged on the digital board.

[0008] Optionally, the chassis includes a main chassis shell, a front panel and a back panel;

[0009] The front panel is provided with an external input power supply port, an Ethernet interface, a noise signal acquisition interface and a vibration signal acquisition interface;

[0010] Wherein, the input end of the primary power conversion circuit is connected to the external input power supply through the external input power supply port, the Ethernet communication module is connected to the external device through the Ethernet interface circuit and the Ethernet interface, the noise and vibration signal processing module is connected to the microphone through the noise signal acquisition interface to obtain the noise signal, and the noise and vibration signal processing module is connected to the vibration sensor through the vibration signal acquisition interface to obtain the vibration signal;

[0011] A grounding stud is arranged on the back plate.

[0012] Optionally, the Ethernet communication module includes a first physical layer network chip, a second physical layer network chip and a third physical layer network chip, and the Ethernet interface circuit includes a Gigabit network interface, a control network interface and a maintenance network interface;

[0013] The input end of the first physical layer network chip is connected to the diagnosis result output end of the acoustic-vibration collaborative diagnosis module, and the output end is connected to the maintenance network and the train bus of the train control and management system through the maintenance network interface;

[0014] The input end of the second physical layer network chip is connected to the diagnosis result output end of the acoustic-vibration collaborative diagnosis module, and the output end is connected to the control network of the train control and management system through the control network interface;

[0015] The input end of the third physical layer network chip is connected to the diagnosis result output end of the sound-vibration collaborative diagnosis module and the original signal output end of the noise and vibration signal processing module, and the output end is connected to the gigabit network interface of the external vehicle-mounted wireless terminal through the gigabit network interface.

[0016] Optionally, it also includes a cascade interface located on the front panel of the chassis for connecting multiple noise and vibration collaborative diagnostic instruments.

[0017] Optionally, the third physical layer network chip is used to perform 5G communication with the external vehicle-mounted wireless terminal.

[0018] Optionally, it also includes a wireless terminal power supply interface for supplying power to the external vehicle-mounted wireless terminal.

[0019] Optionally, it further includes a speed signal processing module arranged on the power board and a speed signal transmission module arranged on the digital board, and a speed signal acquisition interface is also arranged on the front panel;

[0020] The signal input end of the speed signal processing module is connected to the speed signal acquisition interface so that the speed signal processing module obtains the speed signal of the diagnosis object;

[0021] The preprocessing signal output end of the speed signal processing module is connected to the input end of the speed signal transmission module, and the output end of the speed signal transmission module is connected to the input end of the sound-vibration collaborative diagnosis module, so that the speed signal processing module aligns the noise signal, the vibration signal and the speed signal and sends them to the sound-vibration collaborative diagnosis module.

[0022] Optionally, the speed signal transmission module is an RS485 communication module.

[0023] Optionally, a reset control circuit is further provided on the power board, and a reset button is further provided on the front panel;

[0024] The input end of the reset control circuit is used to receive a reset control signal generated after the reset button is triggered, and the control end of the reset control circuit is connected to the reset end of the primary power conversion circuit so as to reset the primary power conversion circuit after the reset button is triggered.

[0025] Optionally, the reset button and the external input power supply port are both connected to the power board via welding wires.

[0026] Optionally, the noise and vibration signal processing module includes a noise signal processing module, a vibration signal processing module and an analog-to-digital conversion module;

[0027] The noise signal processing module includes a DC isolation circuit, a gain adjustment circuit, a first low-pass filter circuit and a first differential processing circuit connected in sequence, wherein the DC isolation circuit is used to isolate the DC component of the noise signal of the diagnosis object, the gain adjustment circuit is used to adjust the gain of the signal output by the DC isolation circuit to a preset range, the first low-pass filter circuit is used to perform low-pass filtering on the signal output by the gain adjustment circuit, and the first differential processing circuit is used to convert the signal output by the first low-pass filter circuit into a first differential signal and output it to the analog-to-digital conversion module;

[0028] The vibration signal processing module includes a current-to-voltage conversion circuit, a second low-pass filtering circuit, and a second differential processing circuit connected in sequence, wherein the current-to-voltage conversion circuit is used to convert the vibration signal of the diagnosis object into a voltage signal, the second low-pass filtering circuit is used to perform low-pass filtering on the signal output by the current-to-voltage conversion circuit, and the second differential processing circuit is used to convert the signal output by the second low-pass filtering circuit into a second differential signal and output it to the analog-to-digital conversion module;

[0029] The analog-to-digital conversion module is used to convert the first differential signal and the second differential signal into digital signals and then output them to the acoustic-vibration collaborative diagnosis module.

[0030] Optionally, the noise signal of the diagnosis object includes a passenger compartment noise signal in a train compartment and a wheel-rail noise signal at an axle box outside the passenger compartment of the train compartment, and the vibration signal of the diagnosis object is a wheel-rail vibration signal at an axle box outside the passenger compartment of the train compartment;

[0031] The acoustic-vibration collaborative diagnosis module is used to perform correlation analysis using the characteristic quantity of the passenger compartment noise signal as the dependent variable and the characteristic quantity of the wheel-rail noise signal and the characteristic quantity of the wheel-rail vibration signal as the independent variables, so as to determine and output the influencing factors and contribution rates of the noise in the passenger compartment of the train compartment.

[0032] Optionally, the power board and the digital board are arranged in parallel on different horizontal planes in the chassis.

[0033] The beneficial effect of the utility model is to provide a noise and vibration collaborative diagnosis instrument, including a chassis, and a power board, a digital board, a power module, a noise and vibration signal processing module, an acoustic vibration collaborative diagnosis module, an Ethernet communication module and an Ethernet interface circuit all arranged in the chassis, the primary power conversion circuit and the Ethernet interface circuit are both arranged on the power board, and the secondary power conversion circuit, the noise and vibration signal processing module, the acoustic vibration collaborative diagnosis module and the communication module are all arranged on the digital board. The hardware of this solution includes two printed circuit boards, a digital board and a power board, wherein the power board includes a primary power conversion circuit, an Ethernet interface circuit, a speed signal processing module, and a reset control circuit; the digital board includes a secondary power conversion circuit, a noise and vibration signal processing module, an acoustic vibration collaborative diagnosis module and a communication module. Through the above-mentioned high-integration design, power conversion, data acquisition, and communication are integrated into an instrument with a size of 94.5mm*220mm*258.26mm, realizing low ripple power supply, synchronous acquisition of sound, vibration, and speed, physical isolation of control Ethernet and maintenance Ethernet, internal cascade networking communication, and Gigabit Ethernet communication with wireless terminals. On the basis of determining the cause of noise generated by the diagnosis object according to noise signals and vibration signals, that is, the diagnosis result, multiple functions such as power supply for various circuits in the noise and vibration collaborative diagnostic instrument, acquisition of noise signals, acquisition of vibration signals, and communication between the noise and vibration collaborative diagnostic instrument and external equipment are integrated to meet the requirements of the noise and vibration collaborative diagnostic instrument in terms of integration, cost, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the prior art and the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0035] Figure 1 A schematic diagram of the structure of a noise and vibration collaborative diagnostic instrument provided in this application;

[0036] Figure 2 A schematic diagram of the chassis structure of a noise and vibration collaborative diagnostic instrument provided in this application;

[0037] Figure 3 A schematic diagram of the front panel interface of a noise and vibration collaborative diagnostic instrument provided in this application;

[0038] Figure 4 A schematic diagram of the structure of an Ethernet communication module in a noise and vibration collaborative diagnostic instrument provided in the present application;

[0039] Figure 5A schematic diagram of the structure of a noise and vibration signal processing module in a noise and vibration collaborative diagnostic instrument provided by the present application;

[0040] Figure 6 A schematic diagram of the structure of a power supply module in a noise and vibration collaborative diagnostic instrument provided in the present application. DETAILED DESCRIPTION

[0041] The core of the utility model is to provide a noise and vibration collaborative diagnostic instrument. On the basis of determining the cause of noise generated by the diagnosis object according to the noise signal and the vibration signal, multiple functions are integrated, such as power supply for various circuits in the noise and vibration collaborative diagnostic instrument, acquisition of noise signals, acquisition of vibration signals, and communication between the noise and vibration collaborative diagnostic instrument and external equipment, so as to meet the requirements on the integration level, cost and other aspects of the noise and vibration collaborative diagnostic instrument.

[0042] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0043] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a noise and vibration collaborative diagnostic instrument provided by the present application, the noise and vibration collaborative diagnostic instrument includes a chassis, and a power board 02, a digital board 03, a power module, a noise and vibration signal processing module, an acoustic vibration collaborative diagnostic module, an Ethernet communication module and an Ethernet interface circuit, all of which are arranged in the chassis;

[0044] The power supply module includes a primary power conversion circuit and a secondary power conversion circuit, the input end of the primary power conversion circuit is connected to the external input power supply, the step-down output end of the primary power conversion circuit is connected to the input end of the secondary power conversion circuit, and the step-down output end of the secondary power conversion circuit is connected to the power supply end of the noise and vibration signal processing module, the power supply end of the sound-vibration collaborative diagnosis module, and the power supply end of the Ethernet communication module;

[0045] The signal input end of the noise and vibration signal processing module is used to input the noise signal of the diagnosis object and the vibration signal of the diagnosis object, the preprocessing signal output end of the noise and vibration signal processing module is connected to the input end of the sound and vibration collaborative diagnosis module, the diagnosis result output end of the sound and vibration collaborative diagnosis module is connected to the input end of the Ethernet communication module, and the output end of the Ethernet communication module is connected to the external device through the Ethernet interface circuit;

[0046] The primary power conversion circuit and the Ethernet interface circuit are both arranged on the power board 02 , and the secondary power conversion circuit, the noise and vibration signal processing module, the sound-vibration collaborative diagnosis module and the Ethernet communication module are all arranged on the digital board 03 .

[0047] Due to the limited space in rail trains and the consideration of cost and hardware resource utilization, the present application provides a noise and vibration collaborative diagnostic instrument. The noise and vibration collaborative diagnostic instrument realizes the acquisition of noise and vibration signals, the processing of noise signals and vibration signals, noise diagnosis and the transmission of diagnostic results through noise and vibration signal processing modules, acoustic vibration collaborative diagnostic modules, Ethernet communication modules and Ethernet interface circuits; the power supply module is used to power each module in the noise and vibration collaborative diagnostic instrument; the above modules are integrated in the chassis, and the primary power conversion circuit and Ethernet interface circuit are set on the power board 02, so that it has the function of the interface board; the secondary power conversion circuit, noise and vibration signal processing module, acoustic vibration collaborative diagnostic module and communication module are all set on the digital board 03 to ensure the transmission and processing quality of noise signals and vibration signals and reduce signal interference and noise.

[0048] Specifically, the noise and vibration collaborative diagnostic instrument needs to have three basic functions: power supply, signal acquisition and processing, and communication. In this embodiment, the module that realizes the power supply function in the noise and vibration collaborative diagnostic instrument is a power module, and the power module further includes a primary power conversion circuit and a secondary power conversion circuit. The primary power conversion circuit steps down the voltage of the external input power supply to a primary power supply voltage, and the secondary power supply voltage further steps down the primary power supply voltage to a secondary power supply voltage required by each module in the diagnostic instrument. Among them, the power interface of the external input power supply can be welded to the power board 02 by welding wire, thereby reducing the requirements for installation space. The power module realizes EMC and electrical safety design, voltage level conversion and ripple noise processing, and provides high-quality electric energy for each module inside the diagnostic instrument.

[0049] In the present embodiment, the modules that realize the noise signal and vibration signal acquisition and processing functions in the noise and vibration collaborative diagnosis instrument include a noise and vibration signal processing module and an acoustic-vibration collaborative diagnosis module. The noise and vibration signal processing module acquires the noise signal and vibration signal of the diagnosis object, for example, by acquiring the noise signal through a microphone and the vibration signal through a vibration sensor. After acquiring the noise signal and the vibration signal, the noise and vibration signal processing module further preprocesses the two. The preprocessing includes but is not limited to isolating the DC component of the noise signal, filtering, and converting the differential signal, etc., as well as converting the vibration signal to a voltage signal, low-pass filtering, and converting the differential signal, etc., to facilitate the subsequent acoustic-vibration collaborative diagnosis module to perform noise diagnosis analysis. The sound-vibration collaborative diagnosis module analyzes the cause of noise generated by the diagnosis object based on the preprocessed noise signal and vibration signal. For example, the noise signal includes the passenger compartment noise signal in the train compartment and the wheel-rail noise signal at the axle box outside the passenger compartment of the train compartment. The vibration signal of the diagnosis object is the wheel-rail vibration signal at the axle box outside the passenger compartment of the train compartment. The sound-vibration collaborative diagnosis module uses the characteristic quantity of the passenger compartment noise signal as the dependent variable, and uses the characteristic quantity of the wheel-rail noise signal and the characteristic quantity of the wheel-rail vibration signal as the independent variables for correlation analysis to determine and output the influencing factors and contribution rate of the noise in the passenger compartment of the train compartment.

[0050] In this embodiment, the module for realizing communication between the noise and vibration collaborative diagnostic instrument and TCMS (Train Control and Management System), external on-board wireless terminal, diagnostic instrument and other equipment includes an Ethernet communication module and an Ethernet interface. After the sound and vibration collaborative diagnostic module determines the cause of the noise generated by the diagnostic object, that is, the diagnostic result, it will first output the diagnostic result to the Ethernet communication module. The Ethernet communication module is connected to various external devices through the Ethernet interface circuit to realize internal and external communication of the diagnostic instrument. Internal communication includes communication between different noise and vibration collaborative diagnostic instruments and communication between the diagnostic instrument and the ground system. External communication includes communication with the train control and management system.

[0051] The noise and vibration system diagnostic instrument in this embodiment integrates each module in the chassis of an instrument on the basis of realizing the above-mentioned power supply, signal acquisition and processing, and communication functions, and installs each module on two boards, namely, the power board 02 and the digital board 03, after integration and planning. In order to improve the integration of the noise and vibration collaborative diagnostic instrument, the present application adopts a design in the form of a small chassis, integrates the power processing, signal acquisition, and communication functions, and uses two boards for assembly, which improves the circuit performance of each module while compressing the volume. Between the power board 02 and the digital board 03. In addition, the power board 02 and the digital board 03 can be arranged in parallel on different horizontal planes in the chassis, thereby reducing the volume of the diagnostic instrument and improving the integration.

[0052] That is, the diagnostic instrument in this embodiment can collect and process noise signals inside the passenger compartment of the rail vehicle, noise signals outside the passenger compartment, and vibration signals at the wheel-rail, and has the conventional interface function of train on-board equipment, and realizes the cascading of diagnostic instruments, the information interaction between the diagnostic instrument and the train control and management system, and the information interaction between the diagnostic instrument and the ground transmission terminal. It is a core platform for realizing train vibration and noise environment monitoring, analysis and control, and the diagnostic instrument has a high degree of integration.

[0053] In summary, the present application provides a highly integrated vehicle-mounted noise and vibration collaborative diagnostic instrument, including a chassis, and a power board 02, a digital board 03, a power module, a noise and vibration signal processing module, an acoustic vibration collaborative diagnosis module, an Ethernet communication module, and an Ethernet interface circuit, all of which are arranged in the chassis. The primary power conversion circuit and the Ethernet interface circuit are both arranged on the power board 02, and the secondary power conversion circuit, the noise and vibration signal processing module, the acoustic vibration collaborative diagnosis module, and the communication module are all arranged on the digital board 03. The hardware of this solution includes two printed circuit boards, namely the digital board 03 and the power board 02, wherein the power board 02 includes a primary power conversion circuit, an Ethernet interface circuit, a speed signal processing module, and a reset control circuit; the digital board 03 includes a secondary power conversion circuit, a noise and vibration signal processing module, an acoustic vibration collaborative diagnosis module, and a communication module. Through the above-mentioned high-integration design, power conversion, data acquisition, and communication are integrated into an instrument with a size of 94.5mm*220mm*258.26mm, realizing functions such as low-ripple power supply, synchronous acquisition of noise and vibration, and Ethernet communication. On the basis of determining the cause of noise generated by the diagnosis object according to the noise signal and vibration signal, that is, the diagnosis result, multiple functions such as power supply for various circuits in the noise and vibration collaborative diagnosis instrument, acquisition of noise signals, acquisition of vibration signals, and communication between the noise and vibration collaborative diagnosis instrument and external equipment are integrated to meet the requirements of the noise and vibration collaborative diagnosis instrument in terms of integration, cost, etc.

[0054] Based on the above embodiments:

[0055] As an optional embodiment, the chassis includes a main chassis shell 11, a front panel 12 and a back panel 13;

[0056] The front panel 12 is provided with an external input power supply port, an Ethernet interface, a noise signal collection interface and a vibration signal collection interface;

[0057] Wherein, the input end of the primary power conversion circuit is connected to the external input power supply through the external input power supply port, the Ethernet communication module is connected to the external device through the Ethernet interface circuit and the Ethernet interface, the noise and vibration signal processing module is connected to the microphone through the noise signal acquisition interface to obtain the noise signal, and the noise and vibration signal processing module is connected to the vibration sensor through the vibration signal acquisition interface to obtain the vibration signal;

[0058] A grounding stud is provided on the back plate 13 .

[0059] Please refer to Figure 2 , Figure 2 The present application provides a schematic diagram of the chassis structure of a noise and vibration collaborative diagnostic instrument, wherein the chassis of the noise and vibration collaborative diagnostic instrument includes a main chassis shell 11, a front panel 12, and a back panel 13. An external input power supply port, an Ethernet interface, a noise signal acquisition interface, and a vibration signal acquisition interface are arranged on the front panel 12, and a grounding stud is arranged on the back panel 13.

[0060] Please refer to Figure 3 , Figure 3 A schematic diagram of the front panel interface of a noise and vibration collaborative diagnostic instrument provided in this application. Figure 3 Take the case where the digital board 03 in the noise and vibration diagnostic instrument is stacked on the power board 02 as an example. Figure 3 The interfaces X1 to X6 correspond to the interfaces that need to be led out on the digital board 03, and X7 to X13 correspond to the interfaces that need to be led out on the power board 02. X1 and X2 are both interfaces of the vibration sensor for collecting vibration signals, X3 to X6 are microphone interfaces of the microphone group for collecting noise signals, X7 is the interface of the speed sensor for collecting the speed signal of the diagnosis object, X8 and X9 are cascade communication interfaces in the Ethernet interface for realizing cascade between diagnostic instruments, X10 is the maintenance network interface in the Ethernet interface, X11 is the control network interface in the Ethernet interface, X12 is the Ethernet interface of the wireless transmission terminal, X13 is the power interface of the wireless transmission terminal (used to power the external vehicle-mounted wireless terminal), RESET is the reset button, and X14 is the power interface. The microphone interface and the vibration sensor interface are designed on the front panel 12 corresponding to the digital board 03 to ensure the quality of analog signal transmission and processing and reduce signal interference and noise. In order to improve the utilization rate of the board and the integration of the instrument, the interface of the speed sensor, the Ethernet interface and the power supply interface of the wireless transmission terminal are set on the front panel 12 corresponding to the power board 02, so that it has the function of an interface board. The external power input interface and the reset button are connected to the power board 02 by welding wires, reducing the requirements for the connector installation space.

[0061] In addition, data transmission is required between the modules on the power board 02 and the digital board 03, so the power board 02 and the digital board 03 are also connected by a transmission line. Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a noise and vibration collaborative diagnostic instrument provided in this application, which transmits a speed signal, a power supply voltage, a reset signal, a diagnostic result, etc. through a transmission line.

[0062] In summary, this embodiment integrates power conversion, signal acquisition and communication functions into a noise and vibration signal collaborative diagnostic instrument with a size of 94.5mm*220mm*258.26mm (height×length×depth) through a highly integrated design, realizing low ripple power supply, synchronous acquisition of sound, vibration and speed, physical isolation of control Ethernet and maintenance Ethernet, internal cascade networking communication, and Gigabit Ethernet communication with wireless terminals. On the basis of determining the cause of noise generated by the diagnosis object according to noise signals and vibration signals, that is, the diagnosis result, multiple functions such as power supply for various circuits in the noise and vibration collaborative diagnostic instrument, acquisition of noise signals, acquisition of vibration signals, and communication between the noise and vibration collaborative diagnostic instrument and external equipment are integrated to meet the requirements of the noise and vibration collaborative diagnostic instrument in terms of integration, cost and other aspects.

[0063] As an optional embodiment, the Ethernet communication module includes a first physical layer network chip, a second physical layer network chip and a third physical layer network chip, and the Ethernet interface circuit includes a Gigabit network interface, a control network interface and a maintenance network interface;

[0064] The input end of the first physical layer network chip is connected to the diagnosis result output end of the acoustic-vibration collaborative diagnosis module, and the output end is connected to the maintenance network and the train bus of the train control and management system through the maintenance network interface;

[0065] The input end of the second physical layer network chip is connected to the diagnosis result output end of the acoustic-vibration cooperative diagnosis module, and the output end is connected to the control network of the train control and management system through the control network interface;

[0066] The input end of the third physical layer network chip is connected to the diagnosis result output end of the sound and vibration collaborative diagnosis module and the original signal output end of the noise and vibration signal processing module, and the output end is connected to the gigabit network interface of the external vehicle-mounted wireless terminal through the gigabit network interface.

[0067] In this embodiment, considering that the external equipment that needs to communicate with the noise and vibration collaborative diagnostic instrument includes the train control and management system and the external vehicle-mounted wireless terminal, the noise and vibration collaborative diagnostic instrument transmits the diagnostic results and original signals to the external vehicle-mounted wireless terminal through the Gigabit network interface, and the external vehicle-mounted wireless terminal then transmits them to the ground terminal center via wireless transmission.

[0068] Specifically, in this embodiment, the Ethernet communication module includes a first physical layer network chip, a second physical layer network chip and a third physical layer network chip, and correspondingly, the Ethernet interface includes a maintenance network interface, a control network interface and a gigabit network interface. After the sound-vibration collaborative diagnosis module determines the diagnosis result based on the noise signal and the vibration signal, the diagnosis result is transmitted to the maintenance network and the train bus of the train control and management system through the first physical layer network chip and the maintenance network interface; the diagnosis result is transmitted to the control network of the train control and management system through the second physical layer network chip and the control network interface; the diagnosis result and the original signal (including the noise signal and vibration signal of the diagnosis object) are transmitted to the external vehicle-mounted wireless terminal through the third physical layer network chip and the gigabit network interface, and the third physical layer network chip performs 5G communication with the external vehicle-mounted wireless to quickly transmit the above-mentioned large amount of data.

[0069] Please refer to Figure 4 , Figure 4 This is a structural schematic diagram of an Ethernet communication module in a noise and vibration collaborative diagnostic instrument provided in the present application. Figure 4 Among them, PHY1 is the first physical layer network chip, PHY2 is the second physical layer network chip, PHY3 is the third physical layer network chip, X1 is a gigabit network interface, X2 and X3 are interfaces connected to the maintenance network and control network of the train control and management system, and X4 and X5 are interfaces for cascading between diagnostic instruments. Three physical layer network chips are used to achieve communication functions and physical isolation requirements. The control network uses a separate physical layer chip to achieve physical isolation from the maintenance network; the maintenance network and the internal train bus network share a physical layer network chip; and the 5G / WIFI wireless communication uses a gigabit network chip to achieve high-speed transmission to ensure the landing of large-capacity sound and vibration monitoring data. The train bus also contains a speed RS485, which is used to realize the speed transmission sharing between each car.

[0070] In addition, considering the need for the noise and vibration collaborative diagnostic instrument to communicate with an external vehicle-mounted wireless terminal, the noise and vibration collaborative diagnostic instrument transmits the diagnostic results and original signals to the external vehicle-mounted wireless terminal through a gigabit network interface, and the external vehicle-mounted wireless terminal then transmits the signals to the ground terminal center through wireless transmission. Therefore, a wireless terminal power supply interface is also provided on the front panel 12 of the noise and vibration collaborative diagnostic instrument to power the external vehicle-mounted terminal.

[0071] As an optional embodiment, it also includes a speed signal processing module arranged on the power board 02 and a speed signal transmission module arranged on the digital board 03, and a speed signal acquisition interface is also arranged on the front panel 12;

[0072] The signal input end of the speed signal processing module is connected to the speed signal acquisition interface so that the speed signal processing module can obtain the speed signal of the diagnosis object;

[0073] The preprocessing signal output end of the speed signal processing module is connected to the input end of the speed signal transmission module, and the output end of the speed signal transmission module is connected to the input end of the sound and vibration collaborative diagnosis module, so that the speed signal processing module aligns the noise signal, vibration signal and speed signal and sends them to the sound and vibration collaborative diagnosis module.

[0074] In this embodiment, in order to further assist in the noise analysis, diagnosis and improvement of the diagnosis object, a speed signal processing module and a speed signal transmission module are also provided in the noise and vibration collaborative diagnosis instrument. The speed signal processing module is provided on the power board 02, and the speed signal transmission module is provided on the digital board 03 to ensure the quality of speed signal transmission and processing and reduce signal interference and noise.

[0075] A speed signal acquisition interface is provided on the front panel 12 of the noise and vibration collaborative diagnosis instrument. The speed signal processing module obtains the speed signal of the diagnosis object collected by the speed sensor through the speed signal acquisition interface. The speed signal processing module pre-processes the speed signal and sends it to the speed signal transmission module (which can be an RS485 communication module). The speed signal transmission module sends the pre-processed speed signal to the sound and vibration collaborative diagnosis module. The sound and vibration collaborative diagnosis module can jointly analyze the cause of the noise generated by the diagnosis object based on the noise signal, vibration signal and speed signal, thereby improving the accuracy of the diagnosis result.

[0076] It should also be noted that the pre-processing of the speed signal by the speed signal processing module includes but is not limited to converting the speed signal from a current signal to a voltage signal, and performing operating point adjustment, bandpass filtering, optocoupler isolation and signal shaping on the speed signal after conversion to the voltage signal; performing operating point adjustment, bandpass filtering, optocoupler isolation and signal shaping on the speed signal in voltage form; converting the speed signal into a speed square wave signal, and aligning the noise signal, vibration signal and speed signal.

[0077] As an optional embodiment, a reset control circuit is also provided on the power board 02, and a reset button is also provided on the front panel 12;

[0078] The input end of the reset control circuit is used to receive a reset control signal generated after the reset button is triggered. The control end of the reset control circuit is connected to the reset end of the primary power conversion circuit so as to reset the primary power conversion circuit after the reset button is triggered.

[0079] Please refer to Figure 6 , Figure 6A schematic diagram of the structure of a power module in a noise and vibration collaborative diagnostic instrument provided in the present application. In the present embodiment, a reset control circuit is also provided on the power board 02, and a reset button is also provided on the front panel 12. After the reset button is triggered, a reset control signal is generated. After receiving the reset control signal, the reset control circuit resets the primary power conversion circuit by triggering the reset end of the primary power conversion circuit, so that the noise and vibration collaborative diagnostic instrument is powered off and restarted. In addition, the reset button and the external input power supply port are connected to the power board 02 through welding wires to reduce the requirements of the connector for installation space. In addition, a power protection circuit can also be provided in the power module, and the power protection circuit is used to suppress the interference of the external input power to the primary power conversion circuit.

[0080] As an optional embodiment, the noise and vibration signal processing module includes a noise signal processing module, a vibration signal processing module and an analog-to-digital conversion module;

[0081] The noise signal processing module includes a DC isolation circuit, a gain adjustment circuit, a first low-pass filter circuit and a first differential processing circuit which are connected in sequence, wherein the DC isolation circuit is used to isolate the DC component of the noise signal of the diagnosis object, the gain adjustment circuit is used to adjust the gain of the signal output by the DC isolation circuit to a preset range, the first low-pass filter circuit is used to perform low-pass filtering on the signal output by the gain adjustment circuit, and the first differential processing circuit is used to convert the signal output by the first low-pass filter circuit into a first differential signal and output it to the analog-to-digital conversion module;

[0082] The vibration signal processing module includes a current-voltage conversion circuit, a second low-pass filtering circuit and a second differential processing circuit which are connected in sequence, wherein the current-voltage conversion circuit is used to convert the vibration signal of the diagnosis object into a voltage signal, the second low-pass filtering circuit is used to perform low-pass filtering on the signal output by the current-voltage conversion circuit, and the second differential processing circuit is used to convert the signal output by the second low-pass filtering circuit into a second differential signal and output it to the analog-to-digital conversion module;

[0083] The analog-to-digital conversion module is used to convert the first differential signal and the second differential signal into digital signals and then output them to the acoustic-vibration collaborative diagnosis module.

[0084] In this embodiment, the noise and vibration signal processing module includes a noise signal processing module, a vibration signal processing module and an analog-to-digital conversion module. Before the noise and vibration signal processing module sends the collected noise signals and vibration signals to the sound-vibration collaborative diagnosis module, it is necessary to perform preprocessing such as protection, filtering, gain adjustment and differential transformation on these signals. At the same time, these signals are sent to the sound-vibration collaborative diagnosis module under the premise of ensuring data alignment, so that the sound-vibration collaborative diagnosis module can accurately perform noise analysis.

[0085] Please refer to Figure 5, Figure 5 A schematic diagram of the structure of a noise and vibration signal processing module in a noise and vibration collaborative diagnostic instrument provided in the present application. The noise signal processing module includes a DC isolation circuit for isolating the DC component in the noise signal, a gain adjustment circuit for adjusting the gain of the signal output by the DC isolation circuit to a preset range, a first low-pass filter circuit for low-pass filtering the gain adjustment circuit, and a first differential processing circuit for converting the signal output by the first low-pass filter circuit into a first differential signal, which cooperate with each other to achieve the purpose of the noise signal processing module isolating the DC component, low-pass filtering and differential conversion of the noise signal of the collected diagnostic object. Finally, the first differential processing circuit outputs the first differential signal to the analog-to-digital conversion module. For example, the noise signal processing module takes a noise signal in the 2HZ to 20KHZ frequency band and with an amplitude between -5V and 5V in the noise signal collected by the microphone group. Figure 5 The vibration signal processing module includes a current-to-voltage conversion circuit for converting the vibration signal from a current signal to a voltage signal, a second low-pass filter circuit for low-pass filtering the signal output by the current-to-voltage conversion circuit, and a second differential circuit for converting the signal output by the second low-pass filter circuit into a second differential signal. Each circuit cooperates with each other to achieve the purpose of current-to-voltage conversion, low-pass filtering and differential conversion of the vibration signal processing module. For example, the vibration signal processing module takes a vibration signal in the 1KHZ to 5KHZ frequency band and with an amplitude between 0.8V and 4V from the vibration signal collected by the vibration sensor.

[0086] The analog-to-digital conversion module converts the noise signal and the vibration signal in the form of the first differential signal and the second differential signal from analog signals to digital signals so that the sound-vibration collaborative diagnosis module can perform data processing, analysis, storage and diagnosis. The analog-to-digital converter can use a 24-bit ADC (Analog-to-digital converter) chip to achieve high-precision synchronous acquisition and high-resolution conversion, which is not particularly limited in this application.

[0087] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. It should also be noted that in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the presence of other identical elements in the process, article or device including the elements.

[0088] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A noise and vibration collaborative diagnostic instrument, characterized in that: It includes a chassis, and a power board, a digital board, a power module, a noise and vibration signal processing module, a sound and vibration collaborative diagnosis module, an Ethernet communication module and an Ethernet interface circuit, all of which are arranged in the chassis; The power supply module includes a primary power conversion circuit and a secondary power conversion circuit, the input end of the primary power conversion circuit is connected to an external input power supply, the step-down output end of the primary power conversion circuit is connected to the input end of the secondary power conversion circuit, and the step-down output end of the secondary power conversion circuit is connected to the power supply end of the noise and vibration signal processing module, the power supply end of the sound-vibration collaborative diagnosis module, and the power supply end of the Ethernet communication module; The signal input end of the noise and vibration signal processing module is used to input the noise signal of the diagnosis object and the vibration signal of the diagnosis object, the preprocessing signal output end of the noise and vibration signal processing module is connected to the input end of the sound-vibration collaborative diagnosis module, the diagnosis result output end of the sound-vibration collaborative diagnosis module is connected to the input end of the Ethernet communication module, and the output end of the Ethernet communication module is connected to the external device through the Ethernet interface circuit; The primary power conversion circuit and the Ethernet interface circuit are both arranged on the power board, and the secondary power conversion circuit, the noise and vibration signal processing module, the sound and vibration collaborative diagnosis module and the Ethernet communication module are all arranged on the digital board.

2. The noise and vibration collaborative diagnostic instrument according to claim 1, characterized in that: The chassis includes a main chassis shell, a front panel and a back panel; The front panel is provided with an external input power supply port, an Ethernet interface, a noise signal acquisition interface and a vibration signal acquisition interface; Wherein, the input end of the primary power conversion circuit is connected to the external input power supply through the external input power supply port, the Ethernet communication module is connected to the external device through the Ethernet interface circuit and the Ethernet interface, the noise and vibration signal processing module is connected to the microphone through the noise signal acquisition interface to obtain the noise signal, and the noise and vibration signal processing module is connected to the vibration sensor through the vibration signal acquisition interface to obtain the vibration signal; A grounding stud is arranged on the back plate.

3. The noise and vibration collaborative diagnostic instrument according to claim 1, characterized in that: The Ethernet communication module includes a first physical layer network chip, a second physical layer network chip and a third physical layer network chip, and the Ethernet interface circuit includes a Gigabit network interface, a control network interface and a maintenance network interface; The input end of the first physical layer network chip is connected to the diagnosis result output end of the acoustic-vibration collaborative diagnosis module, and the output end is connected to the maintenance network and the train bus of the train control and management system through the maintenance network interface; The input end of the second physical layer network chip is connected to the diagnosis result output end of the acoustic-vibration collaborative diagnosis module, and the output end is connected to the control network of the train control and management system through the control network interface; The input end of the third physical layer network chip is connected to the diagnosis result output end of the sound-vibration collaborative diagnosis module and the original signal output end of the noise and vibration signal processing module, and the output end is connected to the gigabit network interface of the external vehicle-mounted wireless terminal through the gigabit network interface.

4. The noise and vibration collaborative diagnostic instrument according to claim 3, characterized in that: It also includes a cascade interface located on the front panel of the chassis for connecting multiple noise and vibration collaborative diagnostic instruments.

5. The noise and vibration collaborative diagnostic instrument according to claim 3, characterized in that: The third physical layer network chip is used for 5G communication with the external vehicle-mounted wireless terminal.

6. The noise and vibration collaborative diagnostic instrument according to claim 3, characterized in that: It also includes a wireless terminal power supply interface for supplying power to the external vehicle-mounted wireless terminal.

7. The noise and vibration collaborative diagnostic instrument according to claim 2, characterized in that: The power board is also provided with a reset control circuit, and the front panel is also provided with a reset button; The input end of the reset control circuit is used to receive a reset control signal generated after the reset button is triggered, and the control end of the reset control circuit is connected to the reset end of the primary power conversion circuit so as to reset the primary power conversion circuit after the reset button is triggered.

8. The noise and vibration collaborative diagnostic instrument according to claim 7, characterized in that: The reset button and the external input power supply port are both connected to the power board through welding wires.

9. The noise and vibration collaborative diagnostic instrument according to claim 1, characterized in that: The noise and vibration signal processing module includes a noise signal processing module, a vibration signal processing module and an analog-to-digital conversion module; The noise signal processing module includes a DC isolation circuit, a gain adjustment circuit, a first low-pass filter circuit and a first differential processing circuit connected in sequence, wherein the DC isolation circuit is used to isolate the DC component of the noise signal of the diagnosis object, the gain adjustment circuit is used to adjust the gain of the signal output by the DC isolation circuit to a preset range, the first low-pass filter circuit is used to perform low-pass filtering on the signal output by the gain adjustment circuit, and the first differential processing circuit is used to convert the signal output by the first low-pass filter circuit into a first differential signal and output it to the analog-to-digital conversion module; The vibration signal processing module includes a current-to-voltage conversion circuit, a second low-pass filtering circuit, and a second differential processing circuit connected in sequence, wherein the current-to-voltage conversion circuit is used to convert the vibration signal of the diagnosis object into a voltage signal, the second low-pass filtering circuit is used to perform low-pass filtering on the signal output by the current-to-voltage conversion circuit, and the second differential processing circuit is used to convert the signal output by the second low-pass filtering circuit into a second differential signal and output it to the analog-to-digital conversion module; The analog-to-digital conversion module is used to convert the first differential signal and the second differential signal into digital signals and then output them to the acoustic-vibration collaborative diagnosis module.

10. The noise and vibration collaborative diagnostic instrument according to any one of claims 1 to 9, characterized in that: The power board and the digital board are arranged in parallel on different horizontal planes in the chassis.

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