System and method for testing and analyzing automobile vibration
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A vibration test and analysis system technology, applied in vibration test, vehicle test, signal transmission system, etc., can solve problems such as inaccurate modal analysis, signal leakage or distortion, etc., to improve vibration performance indicators, optimize structure, Portable effect
Inactive Publication Date: 2010-04-21
SHANGHAI SECOND POLYTECHNIC UNIVERSITY
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This method mainly decomposes the vibration signal through wavelet transform, which requires the development of special analysis sof...
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Embodiment 1
[0025] like figure 1 As shown, an automobile vibration test and analysis system includes:
[0026] The three-way acceleration sensor and the one-way acceleration sensor located in the key parts of the car in operation are used to obtain and output the vibration signals of the key parts of the car in operation respectively;
[0027] a signal conditioning module, connected with the output ends of the three-way acceleration sensor and the one-way acceleration sensor, for conditioning and outputting the signals output by the three-way acceleration sensor and the one-way acceleration sensor;
[0028] a wireless data acquisition card, connected with the signal conditioning module, for collecting and wirelessly outputting the signal conditioned by the signal conditioning module;
[0029] A monitoring computer with a wireless data receiving end is used to receive the wireless signal output by the wireless data acquisition card, and to test and analyze the vibration signal in the runn...
Embodiment 2
[0035] An automobile vibration test analysis method, comprising the following steps:
[0036] 1), the vibration signal acquisition step, using a three-way acceleration sensor and a one-way acceleration sensor to obtain and output the vibration signals of each key component of the vehicle in operation;
[0037] 2), a signal conditioning step, for conditioning and outputting the signals output by the three-way acceleration sensor and the one-way acceleration sensor;
[0038] 3), a wireless data collection step, for collecting and wirelessly outputting the signal conditioned by the signal conditioning step;
[0039] 4), a signal analysis step, receiving the wireless signal output by the wireless data acquisition step, testing and analyzing the vibration signal in the operation of the vehicle, and providing a basis for optimizing the vehicle structure, so as to improve the NVH performance index. Among them, the analysis of vibration signal can be time domain and frequency domain ...
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Abstract
The invention discloses a system and a method for testing analyzing automobile vibration, comprising a three-direction acceleration sensor, a single-direction acceleration sensor, a signal regulating module, a radio data collecting card and a monitoring computer. The three-direction acceleration sensor and the single-direction acceleration sensor are arranged on a key part during the running of the automobile and are used for respectively obtaining and outputting the vibrating signals of each key part during the running of the automobile; the signal regulating module is connected with the output ends of the three-direction acceleration sensor and the single-direction acceleration sensor and used for regulating and outputting the signals output by the three-direction acceleration sensor and the single-direction acceleration sensor; the radio data collecting card is connected with the signal regulating module and used for collecting and wirelessly outputting the regulated signals of the signal regulating module; the monitoring computer is provided with a radio data receiving end and is used for receiving the radio signals output by the radio data collecting card as well as testing and analyzing the vibration signals during the running of the automobile. The device has simple hardware structure, realizes the diagnosing and analyzing function by software, facilitates the upgrading and maintenance, and is conveniently carried.
Description
technical field [0001] The invention belongs to the technical field of automobile vibration analysis, and particularly relates to an automobile vibration test and analysis system and a method thereof. Background technique [0002] With the rapid development of domestic and foreign automobile manufacturing industry and the continuous improvement of user requirements, vibration, noise and harshness (NVH) has become one of the most important technical indicators for evaluating automobile quality. Major automobile companies at home and abroad have begun to invest heavily in NVH research. In NVH characteristics, vibration is one of the most important indicators. The main sources of automobile vibration are key components such as engine, tires, transmission system, and aerodynamics. To improve the vibration characteristics, it is necessary to identify the modes of each key component through vibration testing, so as to optimize the original system structure accordingly. Therefore...
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