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Vibration Plate FAQ

Linear Vibration vs Pivotal Oscillation

Linear vibration and pivotal oscillation are the two major types of motion patterns of all vibration plates in the market. Manufacturers may use different words to refer to these two motion patterns for their vibration machines.

Pivotal oscillation is created using, in mechanical term, a planar four-bar linkage device. It is a seesaw motion centered on a pivotal point. Because of mechanical performance constrain, pivotal oscillation achievable frequency is usually below 15Hz. The amplitude can be designed to reach 10mm.

Linear vibration is created using a spring and eccentric wheel system. It is a circle motion. The term linear comes from a physics attribute of the spring: the compression or extension force of a spring is in linear relationship with the length of the spring. Linear vibration can be made to achieve higher frequency, usually designed to have the frequency range between 15Hz and 50Hz. The achievable amplitude is limited, usually less than 4mm.

The physical attributes and impact on human body of these two types of motion patterns are very different. Their medical treatment applications and effectiveness are also different. Click the link below for detail comparison of these two types of vibration machines.

Vibration Frequency and Amplitude
Frequency

The frequency of a vibration plate can be explained as the number of up-and-down movements the vibrating platform makes in each second. The unit of frequency is Hertz (Hz). For example, if a vibration plate runs on 30Hz, it means it moves up-and-down 30 times in each second.

Some people confuse the vibration frequency with the power supply AC electricity frequency, which is 60Hz in North America, 50Hz in most other regions.

Amplitude

The amplitude of vibration plate is the vibrating platform's travel distance between the lowest point and the highest point. In physics, this distance is called peak-to-peak amplitude.

For pivotal oscillation, the amplitude at the center pivotal point of the vibrating platform is zero. The far from the center, the higher the amplitude. Because pivotal oscillation is generated from a rigid four-bar linkage system, body weight and frequency does not influence the amplitude.

For linear vibration, theoretically the amplitude is evenly distributed on the entire vibrating platform. Because the mechanism involves springs, the amplitude yields to the body weight, and is influenced the frequency.

Speed Level May Be Misguiding

Many vibration plate models use speed level to indicate the speed of vibration. It needs to be aware that speed level is not a standard speed unit.

One manufacturer may configure 99 speed level for a 15Hz max frequency vibration machine. Another manufacturer may configure 20 speed level for the same 15Hz max frequency vibration machine. So 99 speed level of one manufacturer is the same as 20 speed level of the other manufacturer. It is just for the 99 speed level machine, you have to press the button 99 times to reach 15Hz, while for the 20 speed level machine, you only need to press button 20 times to reach the same 15Hz.

It actually makes no sense to configure 99 incremental levels for a vibration machine with max frequency only 15Hz.

The proper and clear way to express the speed of vibration is frequency Hz.

Understanding Vibration G-force
What is G-force

Vibration G-force is an important parameter that indicates the intensity of vibration. G-force is actually not a force but an acceleration rate expressed using gravity acceleration G.

In vibration movement, G-force is not a constant value. It changes between a maximum positive value and a maximum negative value in each vibration cycle. Vibration G-force is decided by the frequency and amplitude.

G-force impact on human body

Vibration plate can put a high G-force on the user. It is like to put multiplied gravity on the user. Vibration G-force only last a tiny fraction of a second in a vibration cycle, so the impact on the user is minimal. The short pulse of the multiplied gravity force creates unique stimulation on muscles, tendons, ligaments and bones. Such stimulation is our needed treatment intervention.

Noise of VT003F

Vibration plates produce mechanical noises and sound wave noises. Mechanical noises are produced due to the friction and impact between moving parts, like bearings, springs and all other assemblies. The higher the frequency the more noise of both type created.

Sound wave becomes audible to human when the frequency is above 20Hz. It is inevitable for a vibration machine that runs above 20Hz. Mechanical noise can be reduced through increasing parts precision and assembly quality.

Mechanical noise reduction has been a challenge for the manufacturing of high frequency vibration plate like VT003F. It is also an important quality level indicator for a vibration machine. Through years of continuous improvement, we are able to reduce the mechanical noise of VT003F to a reasonable level. At below 30Hz, VT003F runs relatively quiet and allows users to listen to radio or watch TV while using the vibration. Above 30Hz, the noise level increases quickly. We conducted noise measurement test and compared the results with the noise range of other typical noise sources. Below link leads to our noise measurement report.

EMF Produced by VT003F

All household electric appliances produce electric and magnetic fields (EMF). Some people report headache, anxiety, depression, nausea, and sleep disturbances when exposed to EMF at certain magnitude. According to EPA, there is no clear scientific evidence that EMF affects human health. EPA does not define a safety or hazard level of EMF exposure.

Some customers expressed concerns about the EMF produced by VT003F. Therefore, we measured the EMF strength on VT003F. The maximum magnetic field strength measured at one foot above the foot plate is 1.3 milligauss at the highest intensity setting. Our EMF measurement are performed in house, not certified or confirmed by any lab. We compared the our measurement results with the EMF data of other household electric appliances and the data from EPA report.

Below link leads to our EMF measurement report.

VT003F Compared with Power Plate

Power Plate offers a series of high-end vibration plates, all are linear vibration type, with the same mechanism as VT003F. The technical parameters are comparable.

Many VT003F users reported similar experience between using VT003F and using Power Plate. Side-by-side examination of the two models can help better understand the pros and cons of each model. Below link leads to our comparison analysis between VT003F and Personal Power Plate.

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