BISOPE series 84- Accelerometer calibration method----------------

Accelerometer is the most commonly used sensor for vibration measurement. It converts the vibration unit (displacement, velocity, acceleration) into a value (voltage, current) proportional to acceleration and outputs it, so it is also called ‘Acceleration pick up’ or ‘Transducer’. When purchasing a new acceleration sensor, you receive data on the calibrated sensitivity from the manufacturer and input the data into the measuring instrument (FFT, Machine analyzer) to measure it. The standard sensitivity is 10mV/g, 20, 100, 200, 1000, etc., and the calibrated sensitivity is indicated as 0.97mV/g, 19.8, 99,197, 998.5, etc. Even if it does not significantly violate the error of general measurement, calibration is absolutely necessary for precise measurement.

 

Accelometer calibration

 

There are many reasons for errors in measurement r............................

 

Key! Vibration sensor, acceleration sensor, Acceleration, Accelerometer, Calibration

#vibration education, #frequency analysis, #resonance measurement#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

 

122 가속도센서의 교정방법

가속도센서의 교정방법 (Accelerometercalibration)

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가속도센서는 진동측정에 가장 많이 사용되는 센서로서 진동의 단위(변위, 속도, 가속도) 중에서가속도에 비례하는 값(전압, 전류)으로 변환 출력해 주므로 ‘Acceleration pick up’, ‘Transducer’로불리우기도 한다. 가속도센서를 신규로 구매하면 제작사에서 교정된 감도(Sensitivity)가적힌 자료를 함께 받아서 계측기(FFT, Machine analyzer)에 그 자료를 입력하여 측정하게된다. 이미 정해진 보통의 감도는 10mV/g, 20, 100, 200,1000등이며 교정된 감도는 예를 들어 0.97mV/g, 19.8, 99,197, 998.5등으로표기된다. 일반적인 측정의 오차에 크게 위배되지 않을지라도 정밀측정에는 반드시 교정(Calibration)이 필요하다.

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키워드	진동센서, 가속도센서, Acceleration, Accelerometer, 교정, Calibration

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VISOPE-진동소음 공진 변위 측정/분석/모니터링/교육 : 네이버 블로그

진동/소음/공진/변위/동하중/측정/결함원인/진동분석/건물진동소음/회전기계/구조진동/진동모니터링/공진분석/고유주파수/FFT/설비진단/조기결함/주파수분석/방진방음/플랜트설비/건물진동/공사장건설도로철도/계측장비센서/무선/진동소음센서/음향방출,SDT/ PDM,CBM,VMS,CMS/기계-구조-배관-건물-공사장-철도/모니터링시스템,MODAL/ODS/진동자격/기술자문/연구심의/교육강의/소음진동기술사/BISOPE/VISOPE,......www.kcbm.

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[한국CBM(주)-진단모니터링 - 홈] 상태측정분석, 특성화 모니터링시스템, CBM진동교육.... CBM 종합솔루션...한국CBM

분석진단(진동소음)기술컨설팅+CBM모니터링시스템+교육

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BISOPE series 70- Force first or acceleration first?

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I asked a person who was explaining the principle of the acceleration sensor, which came first or acceleration first? The piezo principle, which is most commonly used as an acceleration sensor, generates a charge proportional to the physical quantity called acceleration and reads it on a measuring instrument.

However, this is what I am asking.

Does the piezo principle acceleration sensor measure force first?

Does it output directly as acceleration? Or does it measure and convert pressure?

Are force sensors, acceleration sensors, and pressure sensors that use the same principle the same?

Keywords

Dynamic force, Static force, Dynamic force, Accelerometer, Force sensor, Impedance, Accelerometer

 

#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

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108 힘이 먼저인가 가속도가 먼저인가

힘, 가속도, 압력의 측정

힘은 벡터를 가지고 있는 양이다. 이 벡터의 방향을 측정하여 발생하고있는 위치나 힘의 전달방향/경로(TPA)를 측정할 수 있다. 힘은 질량과 가속도의 곱으로 나타낼 수 있으므로 힘이 가해지는 질량을 이미 알고 있다면 가속도를 알 수 있다. 또한 힘은 압력과 면적과의 곱이므로 힘이 가해지는 집중하중의 수직면적을 알고 있다면 힘을 가했을 때 압력 또한알 수 있다.

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BISOPE series 61 Measurement direction and location of vibration sensor...

BISOPE series 61- Measurement direction and location of vibration sensor (casing type) (selection method)

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Even if there are measuring instruments and vibration sensors, if you want to measure the vibration of a target structure or facility (machine), where and in what direction should you attach the sensor and acquire data? It can be overwhelming. In fact, there must be prior knowledge with a lot of theoretical and empirical basis. Selection and setting of measuring instruments and sensors are important, but data that is not measured in the right location becomes the basis for error diagnosis. To summarize, the answer would be ‘a point where the highest vibration state (position, direction, behavior) can be read well, so evaluation is possible and it is safe.’

 

How to select a vibration measurement location

#Vibration sensor, #Acceleration sensor, #Acceleration, #Accelerometer, #Vibration measurement direction, #Vibration measurement location, #Horizontal, #Axial, #Inboard, #Coupling, #Rotating machine…….. www.kCBM.kr,   https://blog.naver.com/vs72 , https://contents.premium.naver.com/bisope/visope

99 진동센서접촉형의 측정방향과 위치 선정방법

진동센서(접촉형)의 측정방향과 위치 (선정방법)

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계측기와 진동센서가 있더라도 막상 대상 구조 또는 설비(기계)의 진동을 측정하자고 하면 어떤 위치에 어떤 방향으로 센서를 부착하고 또 데이터를 취득해야 하는 것인가? 막막할 수 있다. 여기에는 사실 많은 이론적이며 경험적인 근거가 있는 선행지식이 있어야 한다. 계측기나 센서의 선택과 설정도 중요하지만 제 위치에 측정이 되지 않은 데이터는 오류진단을 내기에 근거가 되기때문이다. 줄여서 답을 말해보라면 ‘최고진동상태(위치, 방향, 거동)를 잘 읽을 수 있어서 평가가 가능하고 안전한 지점’이라면 정답일 것이다.

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BISOPE series 50- Displacement sensor 3 (types and weaknesses)

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Displacement means the maximum distance that has changed around the reference line, so it is easy to intuitively judge the maximum amplitude of vibration, and since the amount can represent and replace the magnitude of stress, the main unit of vibration used in various standards (displacement, speed, acceleration). In particular, it is widely used for direct deflection and vibration of structures, vibration monitoring of pipes, and ‘online monitoring’ of shaft behavior using sleeve bearings. This is also the reason why low-frequency acceleration sensors are widely used. The sensor used at this time is accurate and good for evaluation if it directly outputs the displacement, but on the other hand, there are many cases where its use is limited due to limitations in its installation, orientation, and frequency.

 

​Understanding the diversity and weaknesses of displacement sensors

 

 

Type of Displacement sensor	Image	Disadvantages and Features
Eddy current principle , ​ Proximity probe,  Gap sensor		- Responds only to conductors   - Interference between nearby sensors and nearby conductors (a gap of at least 3 times the diameter of the sensor must be provided)   -Vibration measurement below the unit of mm   Linear measurement below -1000Hz
LVDT		-Linear variable differential transducer (measuring the amount of movement of protrusions, bar type, wire type, )   - When measuring absolute displacement, it is necessary to manufacture a jig for the reference position   - Suitable for low frequencies (below 50Hz)
Strain gauge		Measuring micro displacement, vulnerable to noise
Laser doppler		High-frequency measurements (40 kHz) are very expensive
Ultrasonic		Weak in accuracy, low price, general purpose
CCTV, GPS		Currently actively researching resolution issues

 

 

 

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#vibration sensor, #displacement sensor, #proximity probe, #displacement sensor, #VMS, #eddy current, #LVDT, #fft, #vibration education, #acceleration sensor, #3-axis vibration sensor, #status monitoring, #vibration monitoring, # Wireless vibration monitoring, #facility diagnosis, #frequency analysis, #resonance measurement, #resonance analysis, #SDT

 

BISOPE series 40 Vibration evaluation grade and notation method level o...

BISOPE series 40- Vibration evaluation grade and notation method (level of vibration state ABCDE)

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The person in charge of vibration technology is bound to hear the question, “What is the current vibration state of the object in question (equipment, structure, building, etc.)?” from the manager or the person in charge of other technologies. You can even ask about the results when you have only measured and delivered the data. So always have an answer ready for your question.

Basically, evaluating the state of an object requires comprehensive judgment based on absolute, relative, and mutual standards, so it is not easy to answer at the time. . The evaluation of the state of this absolute standard is mainly divided into good / bad / unacceptable, and the various expressions and standards have been summarized.

Level display of vibration evaluation

First of all, the method expressed in overseas standards and reference standards using graphs is that the British type is mainly marked with ABCDE 5 grades, and ......

 

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All copyright  korea CBM  written by BISOPE , vs72@naver.com, 070-4388-0415,  www.kCBM.kr

#online monitoring system, #VMS, #alarm setting, #vibration risk setting, #trend, #vibration rating, #vibration evaluation, #vibration measurement, #resonance measurement, #resonance analysis, #frequency analysis, #vibration consulting, #vibration Sensor, #FFT, #spectrum, #vibration education