In the field of modern industrial production and scientific research, the stability and reliability of products are of paramount importance. In order to ensure that the product can work normally in a variety of complex environments, the vibration test bench came into being. The vibration test bench is a kind of equipment used to simulate various vibration environments that may be encountered in the manufacturing, assembly, transportation and use stages of products, and has important application value for the research, development, quality control, manufacturing and other links of electronics, electromechanical, optoelectronics, automobiles, toys and other industries.
The working principle of a vibration test bench is usually to drive the table surface by an electric motor or hydraulic system to generate vibrations of different frequencies and amplitudes. These vibrations can be random or specific waveforms, such as sine waves or shock waves. By adjusting the frequency, amplitude and direction of vibration, various real-world working conditions can be simulated, so as to comprehensively test and verify the structural strength, mechanical properties and electrical properties of the product.
Features of the vibration test bench
1. High-precision control: The advanced control system can accurately control the frequency, amplitude and waveform of vibration to meet the testing needs of different products.
2. Safe and reliable: The equipment is reasonably designed, stable in structure, easy to operate, and equipped with perfect safety protection measures to ensure the safety and reliability of the test process.
3. Easy operation: The digital display and control system are used to make the operation more simple and intuitive, and at the same time support a variety of test modes and parameter settings to meet different test needs.
How to choose the right vibration test bench?
Choosing the right vibration test rig requires several factors to consider to ensure that the equipment selected will meet your specific testing needs. Here are some of the key selection criteria:
1. Test purpose: Clarify the purpose of the vibration test, such as product development, quality control, or certification testing. Different types of vibration test benches may be required for different testing purposes.
2. Load capacity: Considering the weight and size of the product to be tested, select a vibration test bench that can withstand the corresponding load. The size and weight capacity of the table must match the test sample.
3. Frequency range: Determine the required frequency range according to the use environment and test standards of the product. If high-frequency vibrations need to be simulated, a test bench with a higher upper frequency limit should be selected; Conversely, if the main concern is low-frequency vibration, a test bench with a lower frequency limit should be chosen.
4. Amplitude and acceleration: Amplitude and acceleration are important parameters to measure the performance of a vibration test bench. Depending on the needs of the test, select equipment that can provide sufficient amplitude and acceleration to ensure the validity of the test.
5. Control accuracy: A high-quality vibration test bench should have a high-precision control system that can accurately adjust and maintain the required vibration parameters. This helps to improve the accuracy and repeatability of test results.
6. Functional characteristics: Some advanced vibration test benches have a variety of functional characteristics, such as random vibration, sinusoidal vibration, shock test, etc. Choose a device with the right features for your specific needs.
7. Compatibility and Scalability: Consider the compatibility and scalability of the device to adapt to possible changes or new testing requirements in the future. For example, whether it is easy to integrate with other test equipment or systems.
8. After-sales service and technical support: Choose a supplier with good after-sales service and technical support to ensure that you can get help and support in time during the use of the equipment.
9. Cost-effectiveness: On the premise of meeting the above requirements, consider the cost-effectiveness of the equipment. Consider not only the initial purchase cost, but also the maintenance and operating costs.
By taking into account the above factors, the most suitable vibration test bench can be selected for effective product testing and quality control.
Calibration method of vibration test bench
The vibration test bench is calibrated to ensure that its ability to measure and control vibration meets the requirements of the standard, so as to guarantee the accuracy and reliability of the test results. Here are some common steps and methods for vibration test bench calibration:
1. Pre-calibration check:
- Confirm that the test rig is installed and connected correctly and that there are no loose or damaged parts.
- Check that the power supply and control system of the test bench are operating properly.
2. Preparation of calibration equipment:
- Prepare the equipment required for calibration, such as accelerometers, vibration signal generators, power amplifiers, etc.
- Make sure the calibration device is calibrated and within the expiration date.
3. Install the accelerometer:
- Securely mount the accelerometer at the designated position on the test bench to ensure good contact with the test bench.
- Connect the accelerometer to a data acquisition system or measuring instrument.
4. Set the test parameters:
- Set the frequency, amplitude, acceleration and other parameters of the vibration according to the calibration standard and the specifications of the test bench.
- Determine the test points and test sequences required for calibration.
5. Perform a calibration test:
- Start the vibration test bench so that it vibrates according to the set parameters.
- Actual vibration parameters are recorded using accelerometers and other measurement devices and compared to set values.
6. Data Analysis and Adjustments:
- Analysis of the recorded data to evaluate deviations between the actual performance of the test bench and the nominal performance.
- Based on the analysis results, the control system of the test bench is adjusted to reduce deviations and improve accuracy.
7. Repeat the test:
- After adjustment, repeat the calibration test until the actual vibration parameters are consistent with the set value or within the allowable error range.
- All test data and adjustment processes are documented for subsequent analysis and traceability.
8. Calibration Report & Certificate:
- Prepare a detailed calibration report with test methods, test data, analysis results, and adjustment procedures.
- If the relevant standards are met, a calibration certificate is issued, indicating the calibration status and expiration date of the test bench.
9. Regular Calibration and Maintenance:
- Establish regular calibration and maintenance schedules to ensure that the test bench is always in good condition.
- Regularly inspect the individual components of the test bench and replace worn or damaged parts in a timely manner.
With the above steps and methods, the vibration test rig can be effectively calibrated to ensure that it provides accurate and reliable vibration data under a wide range of test conditions. This helps to improve product quality and reliability, reducing failures and losses due to vibration.
Common faults and troubleshooting methods of vibration test benches
There may be some common faults in the use of the vibration test bench, and timely elimination of these faults is very important to ensure the smooth progress of the test and the long-term stable operation of the equipment. Here are some common faults and how to troubleshoot them:
1. Unable to start or difficult to start:
- Check whether the power connection is normal and whether the power switch is turned on.
- Check that the control system is connected and set up correctly.
- Check if there is overload protection, reset protection device.
2. Unstable or large deviation of vibration frequency:
- Check that the frequency setting of the control system is correct.
- Check that the connection between the sensor and the feedback system is secure.
- Adjust the control system parameters to ensure that the frequency is stable.
3. Vibration amplitude is too large or too small:
- Check that the amplitude is set correctly and adjust to the desired value.
- Inspect the mechanical parts of the shaker for looseness or damage.
- Check whether the output of the power amplifier is normal.
4. Abnormal noise or uneven vibration:
- Check that the fasteners of the shaker are not loose and retighten.
- Check the balance of the shaker and adjust it to the balance state.
- Inspect bearings and transmission components for wear and replace if necessary.
5. Temperature too high or too low:
- Check that the temperature control system is set correctly.
- Check that the heater or cooling system is operating properly.
- Clean the heat dissipation channels to ensure good ventilation.
6. The control system is unresponsive or slow to respond:
- Check that the power supply and connections to the control system are working properly.
- Check whether the control software is working properly and restart the system.
- Check that the sensors and actuators are working properly.
7. Failure of security protection function:
- Check that the safety guards are connected and set up correctly.
- Inspect the protective device for damage and replace it if necessary.
- Regularly test the security features to make sure they are working properly.
8. Damaged or uneven shaker surface:
- Inspect the shaker surface for foreign objects or damage.
- Clean countertops and repair or replace damaged parts.
- Make sure the table is flat to prevent impact on the test sample.
In order to prevent the occurrence of failures, it is recommended to carry out regular equipment maintenance and inspections to find and deal with potential problems in a timely manner. At the same time, the operator should receive professional training and use the equipment in strict accordance with the operating procedures to avoid equipment failure caused by misoperation.
The main function of the vibration test bench
1. Simulate the real vibration environment: The vibration test bench can simulate various vibration situations that the product may encounter in the real environment, such as sinusoidal vibration, random vibration, etc., to test the vibration resistance and reliability of the product.
2. Identification of product performance: Through vibration test, the performance of the product in a specific environment can be evaluated, including the structural strength, durability, safety and so on.
3. Optimize product design: According to the results of vibration test, the design of the product can be optimized to improve the performance and reliability of the product.
The vibration test bench has a wide range of applications, covering many fields such as aerospace, automotive manufacturing, electronics, mechanical engineering, etc. Common applications include:
1. Aerospace: Test the vibrations experienced by aircraft, satellites and various aircraft during take-off, flight and landing.
2. Automobile manufacturing: Evaluate the stress and deformation of automotive parts due to uneven roads and engine vibration during driving.
3. Electronic products: detect the sensitivity of electronic components and the whole machine to vibration during transportation and use.
4. Mechanical Engineering: Verify whether mechanical equipment will produce harmful resonance phenomena during operation.
Vibration test benches are usually equipped with advanced control systems and data acquisition systems, which can monitor and record various parameters in the test process in real time, such as vibration frequency, amplitude, acceleration, etc. This data can help engineers analyze and diagnose potential problems with their products to optimize designs and improve product quality.
As an important test equipment, the vibration test bench plays an important role in modern industrial production and scientific research. It can not only simulate the vibration situation in the real environment, conduct a comprehensive test on the product, but also optimize and improve the product design according to the test results. With the continuous progress of science and technology and the continuous development of industry, the application range of vibration test bench will become more and more extensive, and its role in product quality control and product performance improvement will become more and more important.
Beijing Yishengtaihe can develop a vibration test bench according to user needs, the equipment obtains mechanical vibration through electric, electrohydraulic, piezoelectric or other principles, and inputs the excitation signal into a coil placed in a magnetic field to drive the workbench connected to the coil. In this way, the vibration environment of various frequencies, amplitudes and waveforms can be simulated, and a full range of vibration tests can be carried out on the product.
About Yisheng:
Beijing Yisheng Taihe Technology Co., Ltd. is a high-tech enterprise dedicated to the design, development and construction of environmental simulation laboratories. The project covers all major military industrial institutes and key scientific research industries across the country, and has established an industry-university-research base with China Southern Airlines, established a close cooperation mechanism with Beihang University, designed and built various environmental simulation laboratories for a number of scientific research institutes, and established a leading position in the domestic environmental simulation industry with the professional comprehensive strength of environmental simulation industry application in multiple fields.