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数据记录

当涉及到公共交通时,需要进行很多测量测试以确保安全性和乘坐舒适性。以火车为例,在研发阶段,需要进行多项测试,首先是轨道质量的测量,这需要根据轨道的长度布置大量传感器,进行多次重复测试,多通道分布式采集,DEWESoft NET网络采集解决方案能够完全满足你的需求。

从纽约地铁和欧洲高速列车碰撞测试,我们在这些领域都提供了解决方案。以下为一些基本的应用。

检验及性能测试

为确定列车的最高时速,必须测量测量和底架的振动加速度,从而计算出脱轨指数。Dewesoft软件不仅能够通过内部数学模块计算出所有值,而且也可以在进行GPS数据采集以确定哪段可能存在潜在问题的的同时,记录列车在轨道上行驶的视频数据。

Train and bus performance testing with DEWESoft

Train performance testing.

Train and bus performance testing with DEWESoft

Example of data recorded during train speed test on the commercial train track. Data is recorded with DEWESoft.

Train and bus performance testing with DEWESoft

Train performance testing.

Train and bus performance testing with DEWESoft

Train braking performance test. Data is recorded and then analyzed with DEWESoft.

Train and bus performance testing with DEWESoft

ALSTOM uses DEWESoft for many aspects of testing and development of AGV trains.

Train and bus performance testing with DEWESoft

Radial acceleration sensor placement for train speed test.

Application reports

Rail car testing Rail Car Testing at the New York Metros
New York Subway, USA
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Data recording Trains and railroad infrastructure monitoring
London Underground, United Kingdom
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Increasing allowed track speed Increasing allowed high speed on rail tracks
Slovenske Železnice, Slovenia
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乘坐舒适度测试

乘坐舒适度仅是公共交通工具执行的众多测试之一。通过测量振动,计算出乘坐舒适度指数来评价车辆平台。该标准并不是单一的通过/失败的标准,而且为了找到造成问题的原因并分析可能的解决方案。

游乐设施测试

DEWESoft软件功能强大,易于使用。 支持Xsens公司和Genesys公司的陀螺仪传感器,同时可以采集视频信息,并提供许多相关分析工具。一个好的游乐设施,必须保证安全性及舒适性,确保乘客在乘坐的过程做不会感到任何不适。

部件测试

由于交通工具与汽车构造非常相似,因此,部件测试也交通工具的测试内容大致相同。

Application reports

Transmission testing Transmission system testing
Alstom Rail Transport, Italy
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结构分析

Structural testing

When designing the vehicle, all mechanical parts are done with the use of computer and qualified with finite element method to determine natural frequencies of the structures. However, the need to check those method is needed more than ever to produce a closed loop to correct the models that they fit the measurement results. DEWESoft provides DeweFRF add-on software to add the ability to import the geometry models, measure transfer functions with the use of either hammer or shaker excitation and see fascinating animation of the structures on the fly. Data can be easily exported to UFF format for further processing.

Order tracking

When determining how the structures behave under real operating conditions, order tracking provides the means of seeing the structural response to real life excitation. The rotating parts of the vehicle like engine, shafts or the wheels creates excitation forces on the structure. Did you ever had a car starting to rattle and shake at certain vehicle speed? This car was for sure not tested with DEWESoft and those high vibrations were result resonance frequencies of some elements at certain input frequencies. 

By measuring rotating speed and the response (in terms of vibration, noise and others) the Nyquist, Bode and three dimensional FFTs are generated on the fly giving clear picture of the frequencies having a problem.

Order tracking in DEWESoft

RPM sensor, encoder and pickup for order tracking processing and setup.

Order tracking in DEWESoft

Order tracking setup screen inside DEWESoft 7.

Order tracking in DEWESoft

Order tracking data acquisition screen inside DEWESoft 7.

Order tracking in DEWESoft

DEWESoft 7 includes 2D and 3D graphs for displaying order and frequency data.

Torsional vibration

If the acceleration sensors provides information about linear movement, torsional vibration procedure provides the information about angular vibration. Imagine a long shaft going through the vehicle. Like each structure has linear natural frequencies, this shaft will have angular natural frequencies resulting at high angular vibration at certain rotation speed. To check the bending of the shaft, we mount any kind of angular sensor on each end of the shaft and measure the angle difference. The data can be used in order tracking to give a clear indication of natural frequencies.

Torsional vibration in DEWESoft

Determine the twist angle of a shaft, crank shaft or other rotational mechanic parts of an engine.

Torsional vibration in DEWESoft

Setup pickups, encoders and RPM sensors to start with torsional vibration processing.

Torsional vibration in DEWESoft

Torsional vibration setup screen inside DEWESoft 7.

Torsional vibration in DEWESoft

An example of angle based and time based view for torsional vibration processing in DEWESoft.

Torsional vibration in DEWESoft

Torsional vibration processing in DEWESoft.

Combustion analysis

Dewesoft adds the power of acquiring angle based data and calculate parameters of combustion analysis (maximum pressure, MEP, heat release, temperature, knocking, combustion noise and others). The p-v and CA-scope display shows the measurement results while measuring. DEWESoft uses multi-threading technology to use the new multi-core processors for real time calculations. 

Another major advantage of CA module is that it can be used with other data sources like CAN bus, video, OBDII and time domain analog signals, all synchronized with engine data.

Combustion analysis in DEWESoft

An example of combustion analysis system running DEWESoft with combustion analyzer option.

Combustion analysis in DEWESoft

Angle sensor setup for combustion analysis in DEWESoft 7.

Combustion analysis in DEWESoft

Combustion analysis setup inside DEWESoft 7.


汽车电力系统测试

电动汽车测试的一个重要组成部分就是电力测试。 DEWESoft支持50、60、400、800赫兹及16 2/3Hz及变频的电源模块的输入,非常适合此类测试应用。

分布式数据采集

对于较长的交通工具,使用分布式数据采集系统进行设计是非常重要的。DEWESoft产品非常灵活,用户可以购买多台较少通道的数据采集设备单独使用,但需要更多通道时,可以将多台设备通过网线和同步线连接在一起,构成一台多通道的采集系统。

碰撞测试

公共交通工具必须通过碰撞测试。 DEWESoft软件支持高速数据采集卡以及高速摄像机同步采集,是碰撞测试的完美的测试软件。

交通运输参考用户