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This section provides an overview for vibration levels as well as their applications and principles. Also, please take a look at the list of 5 vibration level manufacturers and their company rankings. Here are the top-ranked vibration level companies as of December, 2024: 1.JFE Advantech Co.,Ltd., 2.RION Co., Ltd..
Table of Contents
Vibration levels are the acceleration of vibrations calculated from physical quantities plus a correction for human perception of vibrations.
The unit is a dB. Vibration can be measured in terms of displacement, velocity, and acceleration, but it is recognized that acceleration is more appropriate as the basis for vibration felt by the human body. Vibration levels are established to regulate vibration pollution.
Vibration has vertical and horizontal directions, and the way people perceive vibration differs according to the direction. Vertical vibration is felt more strongly than horizontal vibration.
As a strain of rapid postwar economic growth, various types of pollution have occurred, and regulations have been enacted to deal with them. The vibration subject to regulation is specified factories, etc., specified construction work, and road traffic vibration. Vibration levels are determined based on the human body's sensory perception during the daytime and nighttime.
Specified factories, etc., are factories and workplaces in designated areas set by local governments. Facilities that generate significant vibration are designated as specified facilities. Examples of specified facilities include metal processing machinery, large compressors, earth or mineral crushers, concrete block machines, injection molding machines for synthetic resin, and wood processing machinery. Vibration limits are established for each region.
Specified construction work is construction work that generates significant vibration; for example, piling machine work, work that destroys buildings, etc., and breaker work are subject to regulation. Vibration levels are set at the boundary of the site, depending on the area, time and duration of the work, and day of the work.
Road traffic vibration is not directly regulated, but is required. If the living environment around a road is deemed to be significantly damaged, the mayor of the municipality will request the prefectural public safety commissioner to make improvements.
Vibration Levels are calculated as the ordinary logarithm of the ratio of the effective vibration acceleration (a), corrected for vibration sensation, to the reference vibration acceleration (a0), times 20. The equation is shown below. The unit is dB.
VL = 20log10^(a/a0)
VL: Vibration Levels (dB), a: RMS value of vibration acceleration with vibration sensory correction (m/s^2), a0: Reference vibration acceleration (m/s^2)
For a0, the Japanese vibration code uses 10^-5m/s^2. Vibration levels are calculated using the ordinary logarithm because, according to Weber-Fechner's law, the sensation of vibration is proportional to the logarithm of the intensity of the stimulus, as is the case with hearing.
The sensory correction used for vibration levels is more sensitive in the frequency bands of 4 to 8 Hz in the vertical direction and 1 to 2 Hz in the horizontal direction than in the other bands.
Vibration levels are published by the Japan Meteorological Agency as seismic intensity classes in dB according to human senses as a guide; a level of 110 dB or higher is a level at which people are tossed about by the shaking and cannot act on their own volition, while a level of 55 dB or lower is a level at which people do not feel the shaking.
If the indicated value is irregular and fluctuates significantly, more than 100 measurements are taken at 5-second intervals, and the value is determined using the LV10 method. In the past, such a method was read by a human, but currently vibration levels meters can calculate it automatically; LV10 is a statistical value, meaning that it accounts for 10% of the time that it is measured.
In principle, the measurement location for ground vibration is at the boundary of the site or property. However, if vibration is measured at the ground level, it may pick up abnormal vibration levels depending on the measurement location. The cause is due to the nature of the ground. It is necessary to measure vibration at multiple points to understand the propagation of vibration.
*Including some distributors, etc.
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Flowline, Inc., based in Los Alamitos, California, is a supplier that specializes in providing industrial instrumentation solutions for level measurement and control. Its product range includes Reflective Ultrasonic Sensors, such as EchoPod and EchoTouch, designed for efficient performance in condensation-prone environments. The company also offer Radar Sensors for liquid level measurement and Guided Wave Sensors suitable for both liquid and solids level measurement. These solutions enable safe and efficient management of contained liquid and solid assets.
JFE Advantech Co.,Ltd. was established in 1973 and is a manufacturer of water instruments and measuring devices based in Nishinomiya, Hyogo, Japan. The company produces various products such as submerged level detectors, ultrasonic pulse coherent flowmeters, optical dissolved oxygen meters, electromagnetic flow velocity meters, and comprehensive water quality meters. The products have been used in various applications including sewage treatment plants, agricultural water systems, factory drainage, hydroelectric power plant, and deep wells management. The company have been certified with ISO 9001 for the water instruments and measuring products in 1995.
Founded in 1944, Rion Corporation, based in Tokyo's Kokubunji City, is a precision equipment manufacturer. It specializes in three main sectors: environmental measurement instruments for noise and vibration analysis, medical equipment for hearing tests and hearing aids, and particle counters for semiconductor and pharmaceutical cleanliness measurement. Rion boasts significant market share in Japan, driven by its advanced technology and service excellence. In environmental measurement instruments, it offers noise meters, vibration meters, and frequency analyzers. In 2022, Rion expanded its environmental division by acquiring Norsonic AS, a prominent noise meter manufacturer. The company caters to diverse customers worldwide, including government agencies, research institutions, manufacturing industries, and R&D departments. With eight subsidiary companies (five in Japan and three overseas) and a global agent network spanning approximately 60 countries, Rion Corporation maintains a strong global presence.
Hawk Measurement Systems, founded in Australia in 1988 is a supplier of field instrumentation to measure and control automation processes. The company's product portfolio includes level, flow, pressure, loop-powered indicators, real-time fluid identification, and more. Its distribution network includes branches in the USA and China, multiple domestic Australian offices, and an extended Global Distribution network. It also offers services such as product selection guidance, after sales and technical and customer support.
Ranking as of December 2024
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | JFE Advantech Co.,Ltd. |
50.0%
|
| 2 | RION Co., Ltd. |
50.0%
|
Derivation Method
The ranking is calculated based on the click share within the vibration level page as of December 2024. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.Number of Employees
Newly Established Company
Company with a History
*Including some distributors, etc.
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
Japan
|
2 | 50.0% |
|
United States of America
|
1 | 25.0% |
India
|
1 | 25.0% |
