Vibration Analyzer

Why Choose Us?

Rich experience
Our products are developed from over 30 years experience and designed to achieve all necessary parameters to conduct a reliable machine analysis.

Technological development
We provides turnkey solutions for machinery Condition Monitoring in the predictive maintenance field. We develops and manufactures vibration measuring instruments, machine condition monitoring equipment and software with user functionality in mind.

Wide range of products
Vibration Analyzer; Portable Rotor Balancer; vibration meter; Wireless intelligent vibration sensor; Accelerometer; Dynamic Balancing.

Professional team
There is/are Above 50 People R&D Engineer(s) in the compan. With a professional R & D team and leading scientific research ability.

What Is Vibration Analyzer

Technicians use vibration analyzers to measure, store, and analyze the vibrations produced by industrial equipment or installations.
Rotating machines – like compressors, pumps, and fans – all vibrate while in operation. Every machine produces its own, baseline level of vibration, or vibration "signature."

Changes in vibration levels or vibration frequency can mean that your asset is developing a new defect. Over time, excessive vibration can damage machinery and create dangerous conditions on your floor. But changes in vibration patterns can also indicate underlying issues like misalignment, imbalance, and bearing faults.

Vibration analyzers measure changes in vibration frequency, displacement, and acceleration. They store vibration data so that you can easily spot patterns and changes over time.

Some vibration analyzers can also use vibration data to diagnose problems in the field. In many cases, good analyzers can also guide technicians through the process of the machine fault.

How Does Vibration Analyzer Work

Vibration analyzer is a process that monitors vibration levels and investigates the patterns in vibration signals. It is commonly conducted both on the time waveforms of the vibration signal directly, as well as on the frequency spectrum, which is obtained by applying Fourier Transform on the time waveform.

The time domain analysis, on chronologically recorded vibration waveforms, reveals when and how severe the abnormal vibration events occur, by extracting and studying parameters including but not limited to root-mean-square (RMS), standard deviation, peak amplitude, kurtosis, crest factor, skewness and many others. Time domain analysis is capable of evaluating the overall condition of the targets being monitored.

In real world applications, especially in rotating machinery, it is highly desirable to incorporate the frequency spectrum analysis in addition to time domain analysis. A complex machine with many components will generate a mixture of vibrations, which is a combination of vibrations from each rotating components. Therefore, it is difficult to use only time waveforms to examine the condition of the critical components such as gears, bearings and shafts in a large rotating equipment. Frequency analysis decomposes time waveforms and describes the repetitiveness of vibration patterns, so that the frequency components corresponding to each components can be investigated. Additionally, the well-established Fast Fourier Transform (FFT) technique facilitates fast and efficient frequency analysis, as well as the design of various digital noise filters.

Vibration Analyzer – Schoice of a Measure

A measure is a unit or standard of measurement that provides a means of evaluating data.. Three vibration measurements are available – displacement, velocity e acceleration. Ideally the transducer will directly provide the selected measurement. Unfortunately, transducer limitations do not always allow direct measurement of vibration in the proper way.
The measurement is selected based on the frequency content of the vibration present, in machine design, on the type of analysis to be conducted (by ex. defects, condition, information about the design), and the information sought.

1.Displacement
● Absolute displacement, which is used for low frequency structural vibration (0 a 20Hz), is related to the voltage (shaft or structure) and is usually measured with a dual integration accelerometer. The absolute displacement of a shaft must be measured with a contact transducer or with a non-contact transducer in combination with a seismic transducer. Unfortunately, frequency must also be considered when severity of displacement and acceleration are evaluated.
● Drelative displacement from the shaft, which is measured with a proximity probe, shows the extent of bearing play used by vibration and is used over a wide range of frequencies. Relative displacement is usually measured, between bearing housing and rotor, by a permanently mounted proximity probe.

2. Velocity
For machine monitoring and analysis, in general, no interval 10 hz up to 1000 Hz, a velocity is the measure used by default. The velocity, which is the time rate of change of displacement, is dependent on frequency and displacement and is related to fatigue. It has been shown to be a good measure in the range from 10Hz to 1000 Hz because a single value can be used for rms or peak velocity in undemanding condition assessments, no need to consider the frequency. the most modern data collectors use accelerometers and the signal must be integrated to obtain the velocity.

3. Acceleration
A acceleration is the measure used above the 1000 Hz, is related to strength and is used for high frequencies such as meshing and bearing defects. Acceleration and velocity are absolute measurements taken at or as close to bearing housings as possible.

Vibration Analysis Methods for Vibration Analyzers

Vibration analyzer is generally broken down into four principles, and each principle gives you specific information on the working conditions and features of the vibrating parts.
● Time domain: When a vibration signal is picked up from a transducer (device that converts a physical quantity into an electrical signal) and displayed on the screen of an oscilloscope, it's called a waveform. This signal is in the time domain. The time domain is amplitude plotted against time. While most machine vibration issues are detected using spectrum analysis, some types are more easily seen in waveform.

● Frequency domain: When the waveform discussed earlier is subjected to spectrum analysis, the end result is a picture of frequency vs. amplitude, known as a spectrum. The spectrum is in the frequency domain like the vibration is in the time domain. Most in-depth analysis of machinery vibration is done in the frequency domain or using spectrum analysis.

● Joint domain: Because vibration signals vary with time, calculating more than one spectrum at once can be useful. This technique is used to calculate variations of the fast Fourier transform, including short-time Fourier transform (STFT).

● Modal analysis: Modal analysis takes measured frequency response functions of a piece of machinery and puts them into a computer model. The computer model can be displayed with animations of all the different vibration modes. The model can be adjusted by either adding to or taking away things like mass or stiffness to see the effects.
Outside of these four basic principles lie numerous forms of analysis, calculations and algorithms used to determine different aspects of vibration analyzer. These include:

● Time waveform: A time waveform is acceleration vs. time displayed as tables and plots. Time waveforms show a short time sample of raw vibration, revealing clues to the condition of machinery not always clear in the frequency spectrum. A method of employing time waveform vibration signals as a vibration analyzer tool is by using FFT.

● Fast Fourier Transform (FFT): FFT is defined as an algorithm used to calculate a spectrum from a time waveform. In other words, it's a calculation intended to break down a signal into all its frequencies. If you'll recall time domain and frequency domain discussed above, FFT converts a signal from the time domain into the frequency domain. Fast Fourier transform is most often used for detecting machine faults like misalignment or unbalance.

● Phase measurement: When talking about vibration analyzer, phase is a relative time difference between two signals measured in units of angle as opposed to time. It only works if the two signals being compared are of the same frequency. Phase measurement is used in tandem with FFT to decipher machine faults like loose parts, misalignment and unbalance.

● Order analysis: Order analysis is a variation of FFT analysis and is mostly used to quantify vibrations of machines with varying revolutions per minute (RPM). In other words, order analysis is frequency analysis where the spectrum's frequency axis is shown in orders of RPM rather than hertz. The term "orders" refers to a frequency that is a multiple of a reference rotational speed. For example, if a vibration signal is equal to twice the frequency of the motor's rotation, the order is two.

● Power spectral density (PSD): Power spectral density is calculated by multiplying the amplitude from the FFT by its different forms to normalize it with the frequency bin width (bin width refers to the grouped x-axis values). Think of PSD as looking at "random" vibrations or motion at many different frequencies. PSD accurately compares random vibration signals that have different signal lengths.

● Envelope analysis: Envelope analysis is a form of vibration analyzer that can detect impacts with very low energy often hidden by other vibration signals. It's a popular diagnostic tool for damaged gear teeth and roller bearings.

● Orbit: The orbit is defined as a plot of a sleeve bearing journal's centerline. It's measured by placing two probes in the bearing housing 90 degrees apart. Data from these probes can be displayed digitally and used to detect shaft vibrations caused by oil whirl - oil whirling around inside, causing the journal to move.

● Resonance analysis: Resonance analysis identifies all the natural vibrations and frequencies in machines. The presence of resonance means high vibration, which could reach damaging levels.

What Can Vibration Analyzer Detect

Time domain vibration analyzer is able to monitor vibration levels. Acceptable operation vibration limits can be pre-defined either through long-term operation and maintenance history or through referring to established standards. If the limit is breached, this could be that the overall health condition of the machine is deteriorating and defects have developed.

Frequency domain vibration analyzer excels at detecting abnormal vibrating patterns. For instance, a crack that has developed on a roller bearing outer race will lead to periodic collisions with bearing rollers. In time waveform, this information is usually hidden and masked by the vibration from other sources. By studying the frequency spectrum, the periodicity of the collisions can be discovered and thus detect the presence of bearing faults.

The Benefits of Using a Vibration Analyzer

Implementing vibration analyzer as part of a predictive maintenance program offers numerous benefits:

Early fault detection: Vibration analyzer can detect developing faults in machinery long before they become visible or audible to human senses. These early detection capabilities help maintenance teams schedule repairs or replacements before a failure occurs, reducing downtime and improving overall productivity.

Improved maintenance scheduling: By identifying the severity of machine faults, vibration analyzer allows maintenance teams to prioritize their efforts and allocate resources more effectively. This targeted approach can result in significant cost savings and improved equipment reliability.

Reduced maintenance costs: Finding and fixing machine faults before they lead to catastrophic failures can help organizations avoid costly repairs and equipment replacements. Furthermore, predictive maintenance based on vibration analyzer can extend the lifespan of machinery, further reducing long-term capital expenditures.

Enhanced safety: Vibration analyzer can play a crucial role in maintaining a safe working environment for employees. Proactively detecting and addressing potential mechanical failures significantly reduces the risk of accidents and injuries in the workplace.

Improved energy efficiency: Faulty machinery often consumes more energy than it should, leading to increased operating costs. Rectifying issues using vibration analyzer helps organizations optimize asset efficiency and reduce energy consumption.

Our Factory

KM Instrument is a global leader in condition monitoring technology. we provides turnkey solutions for machinery Condition Monitoring in the predictive maintenance field. we develops and manufactures vibration measuring instruments, machine condition monitoring equipment and software with user functionality in mind. Our products are developed from over 30 years experience and designed to achieve all necessary parameters to conduct a reliable machine analysis. With a professional R & D team and leading scientific research ability, the KM series products from KM have a solid reputation for quality and excellent performance.
Our products are used widely in industry and we believe our success comes from our focus on simplicity with a high performance to cost ratio. We continue to move forward and establish new markets in developing areas. The strength of our product range comes through development which has involved some of the world's leading professionals in vibration analysis.

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Our Certificate

ISO9001,CE,IP67

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FAQ

Q: What does a vibration analyzer do?

A: Vibration analyzers are devices that detect vibration, shock, and sound. They can be used in machinery to detect problems before they happen. Vibration analyzers work by detecting the motion of a material or object by sensing its frequency. The faster the movement, the higher the frequency detected on a vibration sensor.

Q: How do vibration analyzers work?

A: Vibration analyzers are complex tools. They're both measuring and analysis tools, allowing them to both gather data and analyze it.
Data Collection
Vibration analyzers use a built-in piezoelectric accelerometer to measure vibration levels on industrial equipment, in buildings, on bridges, or on other installations.
The accelerometer captures vibration data and converts into an electrical signal. Depending on the tool, it may record that data as a time waveform or an FFT. You'll see the data displayed on the vibration analyzer's screen.
Depending on the tool, it may also make the data available remotely, so that your teams can access it on their smartphones or tablets when they're off-site.

Q: What equipment is the vibration analyzer?

A: A vibration analyzer is a device that detects mechanical vibrations. It measures the vibration levels in your machine and alerts you to any potential problems, like equipment failure or worn parts that need replacement.

Q: How does a vibration analyzer perform vibration analysis?

A: Vibration analyzers starts with understanding the asset's normal vibration levels at its various states, including normal operation, startup, and shutdown. An asset's signature vibration pattern is essentially a fingerprint of how it normally behaves. With this baseline established, you can create thresholds for acceptable vibration levels vs. abnormal vibration levels.
Once baseline and thresholds are defined, the next step is to translate the raw vibration data into a model that can be analyzed, usually a waveform diagram, showing vibration changes over time. From there, analyze the data, looking specifically at synchronous peaks. These are the high points in your vibration data that repeat at expected times, like every time the motor rotates. Peaks like this are totally normal and aren't a cause for concern, but usually high spikes or peaks that happen at an unexpected time can indicate a problem worth investigating.

Q: How accurate is a vibration analyzer?

A: This output or sensitivity is linear for the most part within the frequency response window of a vibration analyzer. However, it is not always DOT 100 mV/g. The sensitivity varies and can vary up to 5 to 10% both ways (plus and minus). This variation is also called the Accuracy of the Sensor.

Q: What should be noted in vibration analysis of vibration analyzers?

A: The features in vibration spectra can be separated into steady-state signals, which repeat continuously and transient signals, which occur as a result of specific events. Signal characteristics can be further subdivided into synchronous, asynchronous, and sub synchronous features as follows:
In rotating equipment, the vibration spectrum will feature a spike at the fundamental rotation frequency of the shaft. This is true for any system, not just one with flaws. The system typically will also display spikes at multiples of the fundamental frequency, referred to as 2X, 3X, etc. These are known as synchronous peaks. They are frequently tied to physical characteristics of the system. A gear with 32 teeth will introduce a vibration spike at 32X, or 32 times the fundamental frequency, for example.

Q: What can a vibration analyzer detect?

A: The tools and methods described above can be applied to quantitatively assess the condition and performance of equipment. Vibration data can reveal when equipment has broken welds or bolts, whether the rotor bars in a motor are intact, if the air gap between rotor and stator in the motor is non-concentric, etc. Vibration data can alert maintenance teams to structural or rotating looseness or the presence of resonance.

Q: How can a vibration analyzer detect possible faults?

A: As we learn about vibration monitoring, we must also understand how this data contributes to the prediction of asset failures.
All machines emit a vibration signature, or specific vibration profile when operating. With continuous monitoring and analysis, anomalies can be detected in the vibrations of that equipment and its components.
Maintainers verify if an unusual vibration pattern is related to a failure. Then, using spectrum analysis, we assess the anomalies, ensuring the machine's health and proper functioning.

Q: Why vibration analyzer matters?

A: Vibration analyzer ability to predict potential failures makes it a useful tool to plan maintenance, boost asset performance, and prevent unscheduled downtime. It is one of the tools in the predictive maintenance (PdM) tool kit.
Vibration analysis helps conduct condition monitoring to identify potential failures, which ultimately saves money by:
Reducing unplanned downtime and scheduling work that fits an organization's plans
Saving money by boosting product quality through equipment operating at designed performance levels
Eliminating wasted production costs while unplanned repairs are made
Delivering products on time with reliable equipment.

Q: How to measure vibration analyzer?

A: To measure all three components of the target's velocity, a 3-D vibrometer measures a location with three independent beams, which strike the target from three different directions. This allows a determination of the complete in-plane and out-of-plane velocity of the target. A vibration analyzer is a handheld device with a built-in vibration sensor and a display screen. It is used to check vibration levels of an asset or a component part.

Q: What are the parameters of the vibration analyzer?

A: The vibration of an object could be either segmental (impulsive), or whole-body (continuous). In any vibration analyzer, the three main characteristics measured are the amplitude, frequency, and acceleration.
A vibrating body travels, on either side of its stationary position, to a specific maximum distance. Amplitude is the distance to the extreme position on either side from the fixed position and is measured in meters (m). Vibration intensity is dependent upon this amplitude.
A vibrating object that shifts back and forth from its usual stationary location produces a complete vibration cycle on moving from one extreme to another extreme and then back again. This count of the cycles completed by the vibrating object is measured as frequency, measured in hertz (Hz).

Q: Where can a vibration analyzer be used to measure machinery?

A: Vibration analyzers can be used to measure vibrations on any part of a machine, but the recommendations of the relevant standards indicate above all the most sensitive places, such as bearing housings, because there the level of vibrations and amplitudes of forces emerging there are usually the highest.

Q: What are the basics of vibration analyzer testing?

A: Vibration analyzer testing analyzes vibration patterns within mechanical systems or individual components and structures to identify defects and evaluate the test object's overall condition. Vibration analysis allows manufacturers and engineers to: Detect and diagnose structural or system defects.

Q: How to measure severity of vibration analyzer?

A: A vibration analyzer measurement system includes a device to sense the vibration (accelerometer) and an instrument to measure the level of vibration. This equipment also has settings for measuring frequency, a frequency-weighting network, and a display such as a meter, printer or recorder.

Q: What does g mean in vibration analyzer?

A: Vibration analyzer can be expressed in metric units (m/s2) or units of gravitational constant g, where 1 g = 9.81 m/s2. An object can vibrate in two ways: free vibration and forced vibration. Free vibration occurs when an object or structure is displaced or impacted and then allowed to oscillate naturally.

Q: What does vibration analyzer tell you?

A: Vibration analyzer is a process that monitors the levels and patterns of vibration signals within a component, machinery or structure, to detect abnormal vibration events and to evaluate the overall condition of the test object.

Q: What is the frequency range for vibration analyzer?

A: In vibration analyzer testing the amplitude is normally In terms of peak values (displacement 8S peak-peak) with frequencies ranging between 2 and 10,000 Hz. A random signal used in vibration testing has a continu- ous spectrum, with amplitudes varying according to a Gaussian distribUtion.

Q: How many variables are in a vibration analyzer?

A: Vibration analyzer may be caused by various factors, including but not restricted to recurring forces, imbalance, and misaligned machine parts. Displacement, velocity, and acceleration are the three primary vibration measurement variables.

Q: What unit is vibration analyzer reading?

A: For vibration, It is measured in mm/s or IPS. Acceleration is the Time rate of change of velocity. For transportation, we use large units such as m/s2, ft/s2, or "G" which is the acceleration of gravity . For vibration, we use m/sec2, in/sec2, or most commonly acceleration of gravity "G".

Q: What is dB in vibration analyzer testing?

A: Decibel (dB) A unit describing the amplitude of sound, equal to 20 times the logarithm to base 10 of the ratio of the pressure of the sound measured to the reference pressure.