Which Parts Of The Automobile Require Vibration Testing
With the innovation of technology and the continuous improvement of people's living standards, automobile have become a well-known means of transportation. Almost every household has a car, so the requirements for safety and reliability of cars are also increasing. Vibration testing of car components is an important guarantee of car reliability. Next, let me take you to analyze which parts of cars need to undergo vibration testing.
Test conditions: During the test process to maintain a quiet environment, there is no ventilation and heat dissipation conditions, only when the temperature exceeds the working temperature to do a short time vibration test, and then the test should be suspended for a while to let the equipment cool down. In addition to the vibration shaker, all noisy instruments, including the shaker controller, should be placed on the side of the test chamber. The remote control panel and display should be suspended above the test unit so that the staff can hear the noise and control the test process.
Test procedure: Scan the sine wave to repeat the accelerated tuning vibration pattern, at this time may need to add several sweeps to detect abnormal noise. Because the cause of creaking and clicking is difficult to find, the tester must stop doing the next step on the instrument panel, and use the dynamic mode to control the vibration frequency and amplitude, check the real cause of the noise, so as to find the mechanism of noise, many equipment manufacturers also use this method as a means of quality control. Note: Its vibration amplitude should be controlled within the rated experimental value of the normal driving of the car, in order to avoid too violent vibration, to repair the parts and do a good job of tightening.
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The road simulation uses a vibration table to reproduce the recorded historical situation. Sometimes a device consisting of four or six shakers recreates the environment in which a car wheel vibrates at the same time. The use of state-of-the-art signal processing technology and fast digital signal processors accurately mimics the actual vibration environment.
In the past, even if the simulation of ordinary road conditions lasted less than an hour, it took a day of calculation time. Today, a vibration controller can mimic the road's history indefinitely, without the need for hours or a day of off-line calculations. It can even use several vibration shakers at the same time to do imitation tests on several test points.
The process of vibration testing of rearview mirror components by automobile rearview mirror manufacturers is: to identify the resonance frequency of the mirror and the potential structural defects caused by engine vibration; The dynamic signal analyzer is used to measure the response of the product to the shock, and the resonant frequency of the product is measured and compared with the pre-set spectrum. This allows automatic inspection of product quality during manufacturing.
The above is to use the vibration shaker tables to perform vibration testing to detect some auto parts. In order to improve the quality of automobile manufacturing, reduce the cost of automobile maintenance and maintenance, and ensure the safety and stability of its driving, technicians need to flexibly use vibration testing methods in the process of auto parts testing, and constantly optimize the relevant test system. To promote the steady development of China's automobile manufacturing industry tamping technology cornerstone. If you have any environmental testing equipment and other related needs, you can contact Guangdong ALI Testing Equipment Co,.Ltd Ltdat any time for consultation, our engineering team to provide you with safe, reliable and easy to operate test equipment technical solutions.
Instrument panel
Many automobile manufacturers perform vibration tests on instrument panel components to check for squeaks and clicks. Since this is one of the areas that new car buyers are likely to be most dissatisfied with, we can detect the dashboard for creaks and kata with a vibration test.Test conditions: During the test process to maintain a quiet environment, there is no ventilation and heat dissipation conditions, only when the temperature exceeds the working temperature to do a short time vibration test, and then the test should be suspended for a while to let the equipment cool down. In addition to the vibration shaker, all noisy instruments, including the shaker controller, should be placed on the side of the test chamber. The remote control panel and display should be suspended above the test unit so that the staff can hear the noise and control the test process.
Test procedure: Scan the sine wave to repeat the accelerated tuning vibration pattern, at this time may need to add several sweeps to detect abnormal noise. Because the cause of creaking and clicking is difficult to find, the tester must stop doing the next step on the instrument panel, and use the dynamic mode to control the vibration frequency and amplitude, check the real cause of the noise, so as to find the mechanism of noise, many equipment manufacturers also use this method as a means of quality control. Note: Its vibration amplitude should be controlled within the rated experimental value of the normal driving of the car, in order to avoid too violent vibration, to repair the parts and do a good job of tightening.
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Automobile seat
Since car seats are more susceptible to road vibrations, it is best to use road-mimicking technology to test the seat and its seat belt. Instead of using traditional vibration methods, several automotive companies have used high frequency vibration test equipment to check squeaky seats. Install the seat on the pitch plate of the electro-hydraulic shaking table. The noise is automatically checked by dynamic signal analyzer, and 1/3 octave frequency spectrum is obtained. Use instrumental monitoring rather than manual detection, and notify the operator when noise exceeds a preset level.The road simulation uses a vibration table to reproduce the recorded historical situation. Sometimes a device consisting of four or six shakers recreates the environment in which a car wheel vibrates at the same time. The use of state-of-the-art signal processing technology and fast digital signal processors accurately mimics the actual vibration environment.
In the past, even if the simulation of ordinary road conditions lasted less than an hour, it took a day of calculation time. Today, a vibration controller can mimic the road's history indefinitely, without the need for hours or a day of off-line calculations. It can even use several vibration shakers at the same time to do imitation tests on several test points.
Rearview mirror
The stability of the rearview mirror assembly can be tested by using a vibration table to imitate the road vibration. Measure the vibration of the mirror with the scattering of light beams reflected from the rearview mirror, and identify the car to buy the car's pesky vibrating parts. Because the reflected beam is amplified twice by the mirror, even a small vibration of the mirror can blur the rearview mirror image under driving conditions. Therefore, we want to find out the vibration frequency that causes the image blur of the rearview mirror during the test, and use the scanning sinusoidal vibration with controlled acceleration amplitude to add to the rearview mirror. A laser image system is used to monitor the image of the mirror and take the image that appears when the mirror resonates. The program in the laser image system communicates with the vibration control system to store the vibration frequency, amplitude and other relevant parameters (time and date).The process of vibration testing of rearview mirror components by automobile rearview mirror manufacturers is: to identify the resonance frequency of the mirror and the potential structural defects caused by engine vibration; The dynamic signal analyzer is used to measure the response of the product to the shock, and the resonant frequency of the product is measured and compared with the pre-set spectrum. This allows automatic inspection of product quality during manufacturing.
The above is to use the vibration shaker tables to perform vibration testing to detect some auto parts. In order to improve the quality of automobile manufacturing, reduce the cost of automobile maintenance and maintenance, and ensure the safety and stability of its driving, technicians need to flexibly use vibration testing methods in the process of auto parts testing, and constantly optimize the relevant test system. To promote the steady development of China's automobile manufacturing industry tamping technology cornerstone. If you have any environmental testing equipment and other related needs, you can contact Guangdong ALI Testing Equipment Co,.Ltd Ltdat any time for consultation, our engineering team to provide you with safe, reliable and easy to operate test equipment technical solutions.
