BISOPE series 68 Relationship between vibration and noise and frequency

BISOPE series 68- Relationship between vibration and noise and frequency ------------------------------------------------------------------------------ The reason why we can distinguish between people and animals is because each has a different appearance, personality, voice, and scent, and the reason we can distinguish where we are now is because we have an address. Objects and spaces are the same, so we can distinguish and express their unique or current state, but before determining the size (amplitude), we must first distinguish between ‘what’ is big and small. In particular, what is comparable to a person’s ‘voice’ is the ‘frequency’ that appears in vibration and noise. Detecting this frequency is the ability of an experienced and skilled mechanic to solve a problem just by listening to the sound, and it can be compared to the frequency detection method of a measuring instrument. Frequency and period (time), wavelength and propagation speed The movemed. If you think that high frequencies are fast and low frequencies are slow, you are right. Also, high frequencies have short wavelengths, and low frequencies have long wavelengths. This relationship can be summarized as follows. ------ #vibration measuring instrument, #frequency setting, #Fmax, #maximum frequency, #sampling frequency, #sampling rate, #FFT, #3-axis vibration sensor, #acceleration sensor, #vibration education, #building vibration, #vibration measurement, #resonance analysis, #resonance measurement, #vibration monitoring, #vibration noise consulting www.kCBM.kr, https://blog.naver.com/vs72 , https://contents.premium.naver.com/bisope/visope

BISOPE series 57 decibel; DB dB, a way to express the level of noise an...

BISOPE series 57- decibel; DB (dB, a way to express the level of noise and vibration)

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In engineering - generally, the unit of ‘dB (decibel; dB)’ is used to express the ‘size’ of noise, vibration, electricity, etc. If this value is large, it means that the value of noise and vibration is large. Why were these units created? You can just call them pressure (pa), acceleration (G), and voltage (V) as they are... The reason is that the unit dB easily represents the 'range of change in sensation.' So, strictly speaking, dB cannot be said to be a unit because it is a value that varies depending on how the standard is set.

 

Weber-Fechner's law

 

The change in human sensory quantity (P) can be best expressed as the ratio of the change amount to the reference stimulation quantity (S).

#Vibration measurement, #resonance measurement, #resonance analysis, #vibration diagnosis, #vibration noise problem, #vibration noise education, #vibration noise monitoring, #vibration law, #vibration sensor, #noise sensor, #3-axis vibration sensor, #wireless Vibration monitoring, #CBM diagnostic monitoring, #railway vibration, #building vibration, #bridge vibration, #bearing vibration, #gear vibration diagnosis

BISOPE series 54 Measurement direction and location of vibration sensor...

BISOPE series 54- Measurement direction and location of vibration sensor (DE, NDE)

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It is said that the horizontal vibration on the NDE side is high. Where should I look?

Looking at the components of a rotating machine, they can first be divided into the driving part (driving part) side, the driven part (driven part) side, and the coupling (direct coupling, buffer type, belt, etc.) that connects them. Another connection element may be a gearbox that requires an additional separate coupling. Since each component is a machine that is all connected and rotates together, the speed may be different, but vibration is transmitted between each other, and if any connecting part is incorrect or misaligned, the entire machine (equipment) is affected by vibration. Therefore, determining what the vibration is like at a certain location is a very important appointment. Among these, DE and NDE are words that you must know and understand.

 

​DE, NDE and Outboard, Inboard

 

Naming the location of the facility is an issue that has already been------

 

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#Vibration diagnosis of #compressor, #screw compressor, #lobe, #GMF, #pulse frequency, #fft, #resonance analysis, #bearing vibration, #gear vibration, #vibration education, #vibration sensor, #vibration monitoring, #frequency , #resonance analysis, #resonance measurement, #spectrum

BISOPE series 52 Compressor Defect Type 4 Vibration problems relate...

BISOPE series 52- Compressor - Defect Type 4 - Vibration problems related to screw compressors

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Compressors can be categorized by type into centrifugal, reciprocating, diaphragm, and screw types. Among them, the most noisy and structurally problematic type due to vibration is the reciprocating type. However, even though the structure is small, the type that produces too much noise to be operated without a soundproofing enclosure and has frequent vibration problems regardless of high or low frequencies is the screw compressor. A screw-type compressor appears to be a square box covered with an enclosure and connected to pipes, but inside it is a type of compressor that is complex and vibrates, consisting of many gears, bearings, and pipes. Let's summarize what causes vibration that may occur in this screw compressor.

 

​Compressor fault diagnosis - rotary screw compressor

 

When it comes to rotary screw compressor problems, it is probably no exaggeration to say that it is complicated mechanical 

BISOPE series 43- What does solid sound(Structure borne noise) mean?

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The sound of bands and orchestras resounding in the concert hall entertains our brains. Unfortunately, we also analyze the sound. A string instrument that produces sound by plucking the string and its harmonics, a wind instrument that blows wind and produces a beautiful sound with the pipe's unique frequency, and a drum of its own size by beating a drum A percussion instrument that makes a percussive sound, and a keyboard instrument, a person's vocal cords vibrate, and a person's vocal cords vibrate in the throat... This is just music, but it is also called 'structure borne noise, air borne noise' in engineering. What does that mean? is it a guitar? is it a flute? is it a piano? Is it the sound of drums? Why are the pictures of railroad rails and wheels below?

 

The difference between 'structure borne noise, air borne noise'

 

1. What is the difference between the sound coming out of a speaker or mouth and 2. the sound made when hitting a xylophone or drum?

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