Faced with a wide variety of shock absorber models on the market, many users may have a question in their minds:Shock absorber performanceHow to judge good or bad? Do you rely on the parameters in the brochure or trust brand awareness? In practical applications, the true strength of a shock absorber platform needs to be verified through multidimensional testing and comparison in a real working environment. This article will outline a judgment framework to help you scientifically evaluate the performance differences of different shock absorbers and select products that can truly provide stable support for the instrument.
The primary measure of the performance of a shock absorber is its effective isolation frequency range. Usually, the natural frequency of the floor slabs in conventional buildings is around 10-20Hz, while precision instruments are sensitive to vibrations ranging from 0.5Hz to 200Hz. So, for a high-performance active damping platform, its active isolation range should cover at least 1-200Hz. For example, HERZ's AVI series active isolation range is 1Hz-200Hz, while the UT-1000A platform with LFS (Low Frequency Expansion) system can start active damping from 0.5Hz, which is crucial for isolating some ultra-low frequency disturbances. When comparing, you can check the "Active Isolation Range" column in the product specification table. The lower the starting frequency and the higher the ending frequency, the wider the vibration frequency band that can be handled and the stronger the adaptability.
Transmittance is a core value for measuring the performance of a shock absorber, which represents the ratio of the vibration transmitted to the instrument to the original vibration. The lower the transmission rate, the better the vibration isolation effect. Usually, a transmission rate frequency curve graph is provided in the product documentation. The ideal curve is that after the resonance frequency point, the transmission rate rapidly decreases and remains at a low level. For example, the technical parameters of the AVI series indicate that the transmission rate is less than -35dB when it exceeds 10Hz. In percentage conversion, this means that about 98% or more of the vibrations are isolated. When comparing actual measurements, two different brands of shock absorbers can be placed in the same vibration source environment (such as on a vibration table or near a running air compressor), and vibration sensors can be used to measure the residual vibration on their load platforms. Through data comparison, the difference in effectiveness will be clear at a glance.
The performance of a shock absorber is also reflected in its response speed to sudden vibrations. When the environment suddenly changes (such as someone walking on the floor or equipment starting and stopping), high-quality active shock absorption systems can quickly intervene and stabilize the platform. This performance can be evaluated by observing the 'vibration recovery time'. The recovery time of technically advanced active shock absorbers is usually 5-20 milliseconds. Another important indicator is system noise. The shock absorber platform itself should not become a new source of vibration. A common parameter for measuring system noise is "nG/√ Hz", with lower values indicating less noise generated by the system itself. For example, the system noise of the HERZ AVI module is below 50nG/√ Hz, which helps to avoid introducing additional interference. In actual testing, you can connect the oscilloscope to the control output terminal of the shock absorber platform to observe the amplitude of the noise waveform under static and disturbed conditions.
The shock absorber platform needs to bear the actual weight of the instrument and adapt to the possible center of gravity deviation during instrument installation. Therefore, another key focus of testing the performance of shock absorbers is load adaptability. During testing, corresponding loads (weights or equivalent weights can be used) can be applied based on the maximum load-bearing capacity of the shock absorber platform to check whether the platform can maintain its level and whether the vibration isolation effect has decreased. Shock absorbers with "automatic horizontal adjustment" function (such as HERZ TS series) will perform better in this regard, even if the load center of gravity deviates from the center, the system can automatically adjust and maintain stability. For some special large equipment, such as the FEI Titan TEM (weighing approximately 3500 kilograms), multiple shock absorption modules are required to support it together. In practice, the UT-1000A platform can stably support such overweight equipment through four modules, and the installation process does not require specialized lifting equipment, which also reflects the convenience of the design to a certain extent.
In addition to laboratory data testing, referencing successful cases in the real world is also valuable for assessing the performance of shock absorbers. Which research institutions or companies are using the brand's products? What high-precision devices are they applied to? For example, the HERZ UT-1000A platform is widely used in scanning electron microscopy (SEM) and transmission electron microscopy (TEM), including the FEI QEMSCAN 650 SEM and FEI Titan TEM, which have adopted this approach and achieved ideal high magnification imaging results. At the same time, this solution is also applicable to lithography equipment, high-precision metrology equipment, ultra-high vacuum scanning probe microscopy (UHV-SPM), and so on. A product that has been rigorously validated in numerous application scenarios often has more guaranteed performance reliability.
The ultimate performance of the shock absorber platform cannot be achieved without professional pre-sales advice and after-sales service. During the selection process, you can pay attention to whether the supplier provides the following services: firstly, on-site survey to evaluate the vibration environment of your laboratory and provide targeted selection recommendations; The second is installation and debugging support, especially for UT series products that require customized integration, the precision of installation directly affects the final effect; The third is continuous after-sales response, such as whether there is 7x24 hour online support and a fast after-sales response mechanism. As a professional provider of laboratory environment optimization solutions, Younikon Technology Co., Ltd. (Yiying Technology) has accumulated rich experience in this field and can provide customers with standardized service processes from requirement communication, free sample testing, installation and debugging, training and acceptance.
Conclusion:
To judge the performance of a shock absorber, it is not enough to just look at the data in the product manual. It is recommended to conduct comprehensive testing and comparison through the dimensions of vibration isolation range, transmission rate, response speed, load adaptability, and real application cases. A handy shock absorption system can fully unleash the potential of your precision instruments and obtain more realistic and stable measurement results.
About Us: Younikon Technology Co., Ltd. (Yiying Technology) has been focusing on precision thin film measurement and laboratory environment optimization since its establishment, and is the general agent of Filmetrics film thickness gauge in China. We are committed to providing professional products and attentive services to safeguard your precision instruments.
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