Which brand of shock absorption table is good?This is a question that many laboratory managers and precision instrument operators often ask. With the continuous improvement of measurement accuracy requirements in fields such as semiconductors, biomedicine, and materials science, the impact of environmental vibration on equipment is becoming increasingly prominent. Even the slightest vibration can lead to blurred microscope images, measurement data deviations, and even the failure of nanoscale processes. Therefore, choosing a suitable shock absorption table is the foundation for ensuring the smooth progress of scientific research and production. This article will analyze the mainstream shock absorption principles for you, compare the technical path differences of various brands, and help you make a choice that suits you.
The sources of vibration in the laboratory environment are very diverse. The low-frequency shaking transmitted from the building structure, the operation of air conditioning and ventilation systems, the slight vibration of the built-in motors of equipment, and even the disturbance brought by the surrounding traffic may all have a superimposed effect on high-precision instruments. Traditional passive vibration isolation tables, such as rubber pads and air springs, have a good isolation effect on higher-frequency vibrations, but their performance is relatively limited when dealing with low-frequency vibrations within the range of 1-200Hz. Many precision devices, such as atomic force microscopes (AFM), scanning electron microscopes (SEM), and white light interferometric profilometers, are precisely more sensitive to these low-frequency vibrations. Therefore, the active vibration isolation table emerged. It uses an electronic feedback control system to detect and actively counteract the incoming vibration in real time, providing a stable working environment for precision instruments.
The core of the active shock absorption system is a "reverse force" cancellation technology. In simple terms, the system integrates sensors (such as piezoelectric acceleration sensors), controllers and actuators (such as piezoelectric transducers) internally. When external vibration is transmitted, the sensor will quickly capture the vibration signal and convert it into an electrical signal to send to the controller. The controller then instructs the actuator to generate a force of the same magnitude but opposite direction as the incoming vibration, thereby neutralizing the vibration. This feedback control loop has a very fast response speed, usually completed within a few milliseconds, and thus can effectively eliminate disturbances in the low-frequency band. Take the AVI series of HERZ brand represented by Unicom Technology Co., LTD. (Yiying Technology) as an example. Its active vibration isolation range covers 1-200Hz, with a relatively short vibration recovery time (less than 10 milliseconds), and the internal feedback loop helps to suppress the mechanical resonance of the system itself, thereby achieving a relatively ideal vibration isolation effect.
The brands of active shock absorbers on the market each have their own technical expertise. From the perspective of principle and application scenarios, the main differences are reflected in the following aspects:
Vibration isolation degree of freedom: Some basic products may only isolate vibrations in the vertical direction. The more mature technical solutions, such as the HERZ AVI series, can achieve all-round vibration isolation with six degrees of freedom (including three horizontal directions and three vertical directions), which is more effective in dealing with complex and multi-directional disturbances.
Response speed and accuracy: The sensitivity and control algorithms of sensors from different brands vary. In better systems, the system noise can usually be controlled at a relatively low level. For instance, the system noise of the AVI-200 series module is below 50nG/√Hz, which helps ensure that the picture does not shake when observed at high magnification.
Load capacity and scalability: For small desktop devices, lightweight active shock absorbers (such as the desktop all-in-one TS series) can meet the requirements. However, for large-scale instruments, such as transmission electron microscopes (TEM) or scanning electron microscopes (SEM) weighing over 3 tons, modular and high-load-bearing solutions are required. The HERZ AVI-600 series can enhance its total load-bearing capacity by increasing the number of shock-absorbing modules, reaching up to approximately 9,000 pounds (about 4,082 kilograms). Its UT-1000A platform is tailor-made for electron microscopes, featuring an ultra-thin modular design and eliminating the need for dedicated lifting equipment for most instruments during installation.
The integration of passive vibration isolation and active vibration isolation: Pure active systems perform well in the low-frequency band, while in the high-frequency band (typically 200Hz), the passive vibration isolation mechanism comes into play. A complete vibration isolation solution is often a combination of the two, ensuring a relatively consistent vibration isolation effect from low frequencies to high frequencies.
Back to the initial question: Which brand of shock absorber is good? In fact, there is no standard answer, but we can make a judgment through the following points:
First of all, clarify your own needs. What instruments need shock absorption? What is its weight and size? Which frequency bands of vibration are you more sensitive to? For instance, for desktop devices such as atomic force microscopes (AFM) and optical profilometers, an active shock-absorbing table with a relatively compact system, automatic leveling, and an LCD display panel, like the TS series, can be chosen. It is not only convenient to operate but also allows for a direct understanding of the current vibration state. Secondly, examine the technical parameters of the product. Pay close attention to indicators such as vibration isolation range, transmission rate, system noise and response time. For instance, the active vibration isolation range of the AVI-200 WORKSTATION is 1-200Hz, and the passive vibration isolation is > At 200Hz, the transmission rate is lower than -35dB when it exceeds 10Hz. These data can reflect the performance level of the product to a certain extent. Secondly, consider the brand's service capabilities. Active shock absorption technology involves multiple disciplines such as electronics and mechanical vibration. Whether the brand provides on-site investigation, scheme design, installation and commissioning, as well as timely after-sales support will directly affect the user experience. Which brand of shock absorption table is good? You can also look for clues from word-of-mouth and cases - see which brands have long served well-known research institutions and semiconductor enterprises.
Which brand of shock absorption table is good depends on whether it suits your application scenario and whether the supplier can provide professional support. Each shock-absorbing table has its specific design focus. Some emphasize large loads, some pursue quick response, and some emphasize compactness and ease of use. Therefore, before making a purchase, it is recommended that you communicate fully with the manufacturer or agent. You can even apply for on-site vibration testing or free sample testing to make a decision based on the data.
About Us: Since its establishment, Unicon Technology Co., LTD. (Yiying Technology) has been dedicated to the field of precision film measurement and laboratory environment optimization. It is the general agent of Filmetrics film thickness gauges in China. We are committed to safeguarding your precision instruments with professional products and considerate services.
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