CN208736686U - Train based on NVH accelerates and deboost phase ATO Performance Test System - Google Patents
Train based on NVH accelerates and deboost phase ATO Performance Test System Download PDFInfo
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Abstract
The train that the utility model relates to a kind of based on NVH accelerates and deboost phase ATO Performance Test System, the system includes distributed data acquisition substation and data aggregation process center, the distributed data acquisition substation includes sequentially connected various kinds of sensors, data collecting card and controller, the data summarization processing center includes multichannel interchanger and server station host, the controller and server station host is articulated in respectively on multichannel interchanger, and the distributed data acquisition substation is distributed in each compartment of train.Compared with prior art, the utility model has many advantages, such as multichannel, big data acquisition capacity.
Description
Technical Field
The utility model belongs to the technical field of urban rail traffic technique and specifically relates to a train accelerates and braking stage ATO capability test system based on NVH (Noise, Vibration and the english abbreviation of acoustic Vibration roughness (Noise, Vibration, Harshness)).
Background
An ATO (Automatic Train Operation, ATO for short) controls a Train to run along a set speed-displacement curve, and controls the acceleration and deceleration of a Train body; due to the existence of inertia, passengers in the carriage can lean forward and lean backward (commonly called nodding motion) along with the inertia, the passengers are unstable in standing, and the riding comfort of the passengers is seriously influenced. In order to evaluate the performance of the ATO system in the acceleration and braking stages and provide a basis for optimizing the ATO control, a method for objectively evaluating the riding comfort is required.
Through search, a method for determining the comfort level of passengers in a high-speed train is disclosed in the patent with the Chinese patent publication No. CN 107860594A. Firstly, establishing a high-speed train 27 freedom degree vibration model and a human body vertical 9 freedom degree model; secondly, loading the track irregularity signal as an input excitation to a train vibration model to obtain a vibration acceleration response at a measuring point; inputting the vibration acceleration response signal as an input excitation into a human body vertical vibration model, and performing simulation to obtain the vibration acceleration response and the vibration degree response of the human body at the measuring point; and finally, analyzing the simulation result and evaluating the riding comfort. However, the utility model requires complex parameter identification to establish a multi-degree-of-freedom model with sufficient accuracy, and is difficult to realize in practical application; track irregularity affects vertical vibration response, but it is also considered that acceleration and deceleration of the train results in vibration response in the direction of train travel (i.e., longitudinal); in addition, only the vibration signal is detected, and another important factor affecting the riding comfort, noise, is not taken into consideration, so that the riding comfort cannot be completely evaluated.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a train accelerates and braking stage ATO capability test system based on NVH in order to overcome the defect that above-mentioned prior art exists.
The purpose of the utility model can be realized through the following technical scheme:
the utility model provides a train accelerates and braking stage ATO capability test system based on NVH, the system include distributed data acquisition sub-station and data gathering processing center, distributed data acquisition sub-station including all kinds of sensors, data acquisition card and the controller that connect gradually, data gathering processing center include multichannel switch and server station host computer, controller and server station host computer articulate respectively on the multichannel switch, distributed data acquisition sub-station distribute in each carriage of train.
Preferably, the various sensors include an acceleration sensor and an audio sensor;
the acceleration sensor comprises a triaxial acceleration sensor and a one-way acceleration sensor, the one-way acceleration sensor is arranged at the position of an excitation source, and the three-way acceleration sensor is arranged in the carriage to obtain excitation response.
Preferably, the distributed data acquisition substation further comprises a connector adapter plate, the controller is a PXI controller, the data acquisition card is a PXI data acquisition card, the PXI controller is connected with the PXI data acquisition card through a PXI bus, and the PXI data acquisition card is connected with various sensors through the connector adapter plate.
Preferably, the data summarization processing center further comprises a power supply module, a remote power supply enabling module, a clock server and a KVM, wherein the power supply module is respectively connected with the multi-channel switch, the server station host, the clock server and the KVM, and the clock server and the KVM are respectively connected with the server station host;
one end of the multi-channel switch is connected with the server station host, other photoelectric interfaces are connected with all the distributed data acquisition substations, and data issued by all the distributed data acquisition substations are gathered to the server station host through the multi-channel switch.
Preferably, the multi-channel switch is a multi-channel multi-mode switch which supports hundreds of megabytes and gigabytes of Ethernet, supports more than 20 channels of access and supports an optical-electrical interface.
Preferably, the server station host is a workstation level host, and the KVM includes a keyboard, a mouse, and a display.
Compared with the prior art, the utility model has the advantages of it is following:
1. the utility model discloses a sensor network gathers this type of signal through acceleration sensor and is used for extracting the characteristic of vibration, still gathers the characteristic that this type of signal is used for extracting the noise through audio sensor, measures train operation comfort level from the multidimension degree.
2. The power supply module of the utility model can obtain electric energy from the train main power supply system nearby; in order to reduce the influence of unstable power supply on the train on the data acquisition system, the train is provided with an uninterruptible power supply.
3. The utility model discloses a clock server supports GPS, big dipper or IRIG time service, and it provides accurate time for the server at server station, and the server station is with local time synchronization to each data acquisition sub-station to reach the effect of each distributed acquisition sub-station time synchronization.
4. The utility model discloses a sensor network spreads throughout inside and outside the carriage everywhere, can acquire original signal on a large scale with high sampling rate.
Drawings
Fig. 1 is a structural topological diagram of the NVH evaluation system of the present invention;
fig. 2 is a schematic diagram of the arrangement of the evaluation system of the present invention.
Wherein, 1 is a distributed data acquisition substation, and 2 is a data summarization processing center;
the system comprises a PXI controller 11, a PXI acquisition card 12, various sensors 13, an acceleration sensor 131, an audio sensor 132, a server station host 21, a multi-channel switch 22, a power supply module 23, a clock server 24 and a KVM 25.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall fall within the protection scope of the present invention.
As shown in fig. 1 and 2, an ATO performance testing system for acceleration and braking stages of a train based on NVH uses NVH parameters of an urban rail train as a basis for ATO performance evaluation, the system comprises a distributed data acquisition substation 1 and a data summarization processing center 2, the distributed data acquisition substation 1 comprises various sensors 13, a data acquisition card and a controller which are sequentially connected, the data summarization processing center 2 comprises a multi-channel switch 22 and a server station host 21, the controller and the server station host are respectively connected to the multi-channel switch in a hanging manner, the distributed data acquisition substation is distributed in each carriage of the train and sends acquired acceleration and audio signals to the server station host, and the server station host analyzes and processes received data to obtain riding comfort.
The various sensors 13 comprise an acceleration sensor 131 and an audio sensor 132, the acceleration sensor collects acceleration signals to extract vibration characteristics, the audio sensor collects audio signals to extract noise characteristics, and the NVH parameters of the train can be obtained by integrating the vibration characteristics and the noise characteristics; the acceleration sensor 131 comprises a triaxial acceleration sensor and a unidirectional acceleration sensor, the unidirectional acceleration sensor is arranged at the position of an excitation source, and the three-way acceleration sensor is arranged in the carriage to obtain excitation response.
The distributed data acquisition substation 1 further comprises a connector adapter plate 15, the controller is a PXI controller 11, the data acquisition card is a PXI data acquisition card 12, the PXI controller 11 is connected with the PXI data acquisition card 12 through a PXI bus 14, and the PXI data acquisition card 12 is connected with various sensors 13 through the connector adapter plate 15;
the PXI controller runs a real-time operating system to meet the requirement of large-amount data acquisition and processing; the programs run on the PXI controller comprise data stream management, filtering, engineering quantity conversion and fast Fourier transform modules, and the modules are used for calculating the characteristic values of all channel signals.
The data summarization processing center 2 further comprises a power supply module 23, a remote power supply enabling module, a clock server 24 and a KVM25, wherein the power supply module 23 is respectively connected with the multi-channel switch 22, the server station host 21, the clock server 24 and the KVM25, and the clock server 24 and the KVM25 are respectively connected with the server station host;
the power supply module can obtain electric energy from a train power supply system nearby to ensure that a server station host can work normally, and is provided with an uninterruptible power supply to reduce the influence of unstable power supply on a train on the device; the remote power supply enabling module enables an operator to switch on or switch off the power supply of the distributed data acquisition substation in the cab; the clock server supports GPS or Beidou time service and can provide accurate time for the server station host; the server station host synchronizes the time of the local computer to each distributed data acquisition substation, so that the time synchronization effect of each distributed data acquisition substation is achieved;
one end of the multi-channel switch 22 is connected with the server station host, other photoelectric interfaces are connected with all the distributed data acquisition substations, and data issued by all the distributed data acquisition substations are gathered to the server station host through the multi-channel switch; and the control instruction of the server station host program is also sent to each distributed data acquisition substation through the multi-channel switch.
The multi-channel switch 22 is a multi-channel multi-mode switch, supports hundreds of mega and giga Ethernet, supports more than 20 access channels, and supports an optical-electrical interface.
The server station host 21 is a workstation level host, the KVM includes a keyboard, a mouse, and a display, and the KVM is connected to the server station host and can access resources of the server.
Ride comfort index calculated based on NVH:
the riding comfort is determined by the vibration and the noise, and is not recorded as the vibration comfort and the noise comfort respectively.
And (4) calculating the vibration comfort degree reference standard UIC 513-1994 railway vehicle riding comfort evaluation (when more than two frequency components exist in the vibration response of the same measuring point):
wherein,
here W is the resultant vibration stationarity index, AiAfter spectral analysis of the vibration waveform at frequency fiThe amplitude of the time-dependent vibration acceleration.
The noise comfort degree is calculated by reference to the GB T3449 and 2011 acoustic railway vehicle internal noise vehicle. Considering that the noise in the carriage is fluctuating discontinuous noise, the influence of the noise on the human body is evaluated by using a noise energy averaging method, namely equivalent continuous (A-weighted) sound level LAeqRepresents:
wherein, PA(t) represents the instantaneous a-weighted sound pressure; p0Is the reference sound pressure. L isAeqThe noise comfort can be directly described.
As shown in fig. 1 and fig. 2, each of the sensors includes an acceleration sensor array and an audio sensor array; analog signals acquired by a sensor network in a single carriage enter the front end of a data acquisition board card through an analog signal conditioning circuit, are converted into digital signals through AD (analog-to-digital) and acquired by a high-performance solid controller, and are issued through Ethernet after calculation and conversion; similarly, the collected acceleration and audio analog signals in other cars are filtered, AD converted, calculated and distributed through the Ethernet. All the distributed data acquisition substations are hung on the multichannel exchanger, and the #9 server station host is also hung on the multichannel exchanger, so that the server station host can access the contents issued by all the data substations and can issue control instructions to each substation through the exchanger. The clock server provides time service pulse for the server station host computer so as to synchronize the time of all the distributed substations.
Aiming at project examples, the system needs to be provided with at least 1 workstation level host, 1 clock server, 1 high-performance switch, 8 distributed data acquisition substations (aiming at A type train and 8-section marshalling), and an optical fiber or ultra-five twisted pair shielding network cable is laid to build an Ethernet channel, a plurality of acceleration sensors and audio sensors.
The system is provided with a strain sensor and a displacement sensor and provides basis for positioning a noise vibration source; the system is provided with a GPS or Beidou module to acquire coordinate information and can draw a speed-displacement curve of train operation; the train comfort index calculation of the system also supports the GB 5599-85 standard.
The spectral characteristics of the noise and vibration signals of a mechanical system are determined by the characteristics of the excitation and the inherent characteristics of the system itself. Thus, the noise and vibration signals exhibited by the mechanical system include both the dynamic characteristics of the excitation and the inherent characteristics of the system. The utility model discloses still usable noise and vibration signal's spectral feature diagnose the unusual vibration of train and the reason of noise.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope of the present invention, and these modifications or replacements should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (6)
1. The system is characterized by comprising a distributed data acquisition substation and a data collection processing center, wherein the distributed data acquisition substation comprises various sensors, a data acquisition card and a controller which are sequentially connected, the data collection processing center comprises a multi-channel switch and a server station host, the controller and the server station host are respectively connected to the multi-channel switch in a hanging manner, and the distributed data acquisition substation is distributed in each carriage of the train.
2. The system for testing ATO performance of train in acceleration and braking stage based on NVH of claim 1, wherein said various sensors include acceleration sensor and audio sensor;
the acceleration sensor comprises a triaxial acceleration sensor and a one-way acceleration sensor, the one-way acceleration sensor is arranged at the position of an excitation source, and the triaxial acceleration sensor is arranged in the carriage to obtain excitation response.
3. The system for testing ATO performance of train in acceleration and braking phase based on NVH of claim 1, wherein said distributed data acquisition substation further comprises a connector adapter plate, said controller is a PXI controller, said data acquisition card is a PXI data acquisition card, said PXI controller is connected with the PXI data acquisition card through PXI bus, said PXI data acquisition card is connected with various sensors through the connector adapter plate.
4. The system for testing ATO performance of train in acceleration and braking stage based on NVH of claim 1, wherein said data summarization processing center further comprises a power supply module, a remote power supply enabling module, a clock server and a KVM, said power supply module is respectively connected with a multi-channel switch, a server station host, a clock server and a KVM, said clock server and a KVM are respectively connected with the server station host;
one end of the multi-channel switch is connected with the server station host, other photoelectric interfaces are connected with all the distributed data acquisition substations, and data issued by all the distributed data acquisition substations are gathered to the server station host through the multi-channel switch.
5. The system for testing ATO performance of train in acceleration and braking phase based on NVH as claimed in claim 4, wherein said multi-channel switch is a multi-channel multi-mode switch supporting hundreds and thousands of mega Ethernet, supporting more than 20 channels of access, and supporting optical-electrical interface.
6. The system according to claim 4, wherein the server station host is a workstation level host, and the KVM comprises a keyboard, a mouse and a display.
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| CN201820858763.3U CN208736686U (en) | 2018-06-04 | 2018-06-04 | Train based on NVH accelerates and deboost phase ATO Performance Test System |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109000942A (en) * | 2018-06-04 | 2018-12-14 | 卡斯柯信号有限公司 | Train based on NVH accelerates and deboost phase ATO performances evaluation system and method |
| CN110928197A (en) * | 2019-11-28 | 2020-03-27 | 西门子交通技术(北京)有限公司 | Simulation test method and system for automatic control of train |
| CN116337491A (en) * | 2023-05-29 | 2023-06-27 | 眉山中车制动科技股份有限公司 | Train test bed data acquisition system and data acquisition method |
-
2018
- 2018-06-04 CN CN201820858763.3U patent/CN208736686U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109000942A (en) * | 2018-06-04 | 2018-12-14 | 卡斯柯信号有限公司 | Train based on NVH accelerates and deboost phase ATO performances evaluation system and method |
| CN110928197A (en) * | 2019-11-28 | 2020-03-27 | 西门子交通技术(北京)有限公司 | Simulation test method and system for automatic control of train |
| CN110928197B (en) * | 2019-11-28 | 2021-08-17 | 西门子交通技术(北京)有限公司 | Simulation test method and system for automatic control of train |
| CN116337491A (en) * | 2023-05-29 | 2023-06-27 | 眉山中车制动科技股份有限公司 | Train test bed data acquisition system and data acquisition method |
| CN116337491B (en) * | 2023-05-29 | 2023-08-29 | 眉山中车制动科技股份有限公司 | Train test bed data acquisition system and data acquisition method |
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Assignee: VI SERVICE NETWORK Co.,Ltd. Assignor: Casco Signal Ltd. Contract record no.: X2023980041655 Denomination of utility model: NVH based ATO performance testing system for train acceleration and braking stages Granted publication date: 20190412 License type: Common License Record date: 20230913 |
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