BISOPE series 95- Acceleration sensor (ICP)---------------------------------------------------------------------------------------------------------
The amount of charge generated from the
transducer (sensor; converter) must express a subtle difference, so careful
attention is required in the detailed measurement path. In particular, noise
due to cable noise or installation errors can lead to fatal measurement errors.
Recent measurement methods are more compact and accurate, and often include
self-verification.
In
particular, the external amplifier (charger type) system used
in the past used an amplifier in the middle to amplify the small amount of
charge and use it.
ICP Accelometer (Integrated circuit Piezoelectric
type = IEPE)
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.
