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

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BISOPE series 7 3 axis vibration sensor 3 axis vibration and accelerati...

BISOPE series 7- 3-axis vibration sensor (3-axis vibration and acceleration sensor)

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An accelerometer is the easiest transducer to measure vibration. Since the measurement direction of this transducer has already been determined, the sensor must be placed in the desired direction for measurement. It doesn't really matter if it's up or down. This is because vibration is repeated and if you want to know the relative movement, you have to use two or more sensors that measure it at the same time anyway. In this case, the concept of a phase is only additionally required. However, compared to a single axis vibration sensor, a triaxial vibration sensor literally means a sensor having the ability to measure the magnitude of vibration in three axes at the same time. It is easy to measure and you will be able to identify vibrations in all directions in a short time.

 

Advantages and disadvantages of Triaxial Accelerometer

Triaxial is described as each three-dimensional orthogonal direction in Z, X, and Y directions (H, V, A directions in the case of vibration diagnosis of rotating equipment) that are perpendicular to each other. The axes in each direction have an initial phase difference of 90 degrees from each other, and the 3-axis vibration acceleration sensor outputs the amount of vibration acceleration in each direction as voltage. Therefore, it can be said that the 3-axis vibration sensor has the following advantages.

 

First of all, it is possible to measure the vibrations in all directions at the same time. It measures the vibration in each axis direction at the same time without the need to measure it sequentially with several different sensors or at different times, so it is possible to prove the simultaneous state at the time and shorten the measurement time.

 

Second, it is possible to measure -----

 

On the other hand, the 3-axis vibration acceleration sensor is at least twice as high expensive as the combined price of all three single-axis sensors, and the average probability of failure (MTBF) of the single-axis sensor is shortened to 1 year compared to the manufacturer's recommended 3 years. do. However, in fact, the piezo-type accelerometer is more robust and less durable than expected, so it is not easy to check the broken state. Recently, like a gyro sensor, a modularized sensor capable of measuring 6-axis vibration has already appeared, and like MEMS, which basically employs 3 axes, new-technology vibration sensors with clear advantages of low frequency have already started to lead in price. The day when MEMS sensors will be used more often than piezos can be seen in the near future.

 

Key! Vibration sensor, accelerometer,, Acceleration, Accelerometer, piezoelectric effect, piezoelectric element,piezo,ICP,3 axis vibration sensor,3 axis vibration, vibration measurement ,mems, iepe, vibration education

 

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