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TIPS AND INFORMATION ON ACCELERATION UNIT GL7-CHA

1) PIEZOELECTRIC TYPE SENSOR

The measurement principle of a piezoelectric sensor utilizes the piezoelectric effect that generates electric charge when stress is applied to certain materials.  Generated electric charge is usually converted to voltage by a charge amplifier, and measured with a logger. 

Piezoelectric sensors have not only acceleration but many types of sensors.

2) CHARGE

When an electric current of 1 A (ampere) flows through the conductor, the amount of electricity passing per second is defined as 1 C (coulomb).  Charge (trinket, electric quantity) is one of the properties of elementary particles, and the amount of charge is called charge amount.  Sometimes charges and charged particles are simply called as electric charge.  Charge is the integral of the current over time and the SI assembly unit of the charge is defined as ampere-second [As].  This unit is called Coulomb [C], and it is represented by 1 [C] = 1 [As].

3) CONCEPT OF ACCELERATION SENSOR

Acceleration sensors are generally used to measure vibration phenomena.  A brief explanation of the principle of the piezoelectric type acceleration sensor is, it extracts electric signal of piezoelectric element and outputs it as acceleration information.  Acceleration information due to a vibration phenomenon is converted as analog information by charge or voltage.  A sensor output from the sensor and outputting electric charge is called a charge type acceleration sensor.  The sensor that outputs the voltage is called the built-in acceleration sensor.

4) ACCELERATION UNIT

There are various types of vibration sensors. Acceleration sensors are roughly divided into four types.  Please select the amplifier unit depending on the output specification of the sensor.

5) ACCELERATION SPEED CONVERSION, DISPLACEMENT TRANSFORMATION

Acceleration time integral equals speed. If speed is integrate over time it is displacement. (Double integration of acceleration will result in displacement.)

6) TEDS

TEDS (Transducer Electronic Data Sheet) is a generic term for formats that describe sensor-specific information embedded in the sensor for measurement.

The acceleration unit [GL 7 - CHA] corresponds to the IEEE 1451.4 standard template No. 25 (acceleration sensor).

When TEDS compatible sensor is connected to Acceleration Unit [GL 7 - CHA] and TEDS information is read, stored information as rated capacity, rated output and unit are loaded into the acceleration unit [GL 7 - CHA]. Sensor calibration value input becomes unnecessary, and the starting time for the measurement is shortened, making the process easier.

* Please refer to "About TEDS" of document (connection method and utilization technique).