Vibration Sensors D7S
Compact & High-precision Seismic Sensors
- Reducing Secondary Disasters from Earthquakes -
9.8
mm
10.9
mm
D7S
What Is an SI Value?
The SI value (or spectral intensity) is equivalent to the magnitude of
the destructive energy imposed by seismic motion on structures.
The SI value, which is the average value of the integrated velocity
response spectrum, is an index that expresses the destructive force of
seismic motion and is highly correlated with the damage to structures.
SI value
formula
2
6
7
Relationship between SI Value and
Measured Seismic Intensity Equivalent Value
Seismic intensity scale of Japan
5
1
SI =
2.4
∫
2.5
0.1
4
Sv ( T,h)dT
SI value (kine): Logarithmic axis
3
1.0
10.0
100.0
New earthquake detection sensors with high detection precision and low electricity
consumption through 3-axis acceleration sensors and a unique SI value calculation algorithm.
Superior cost performance.
The Best for Embedding in Equipment
Ultra
Compact
The D7S can be embedded in essentially any device thanks to
its ultra-small size and ultra-low consumption to contribute to
package downsizing.
High
Precision
Rejects Impulse Vibration Noise
Spectral intensity (SI) high-precision earthquake indicator,
which correlates highly with damage to structures.
IoT
Friendly
Earthquake Maps and Rescue Maps
Internal memory and I
2
C interface enable the creation of
original applications.
Comparison of SI Values and Acceleration
As an index, the SI value has a higher
correlation with the seismic intensity scale
of Japan than the maximum acceleration
does. This makes it possible to make
judgments that accurately reflect structural
damage.
Overview
Calculation load
Correlation with
structural damage
Correlation with the
Japan Meteorological
Agency’s earthquake level
Maximum acceleration
Maximum acceleration value
Small
Seismic intensity scale of Japan
Calculated from the
acceleration
Large
SI value
Average value of the
shaking velocity
Small to medium
Empirical formula
set by the Japan
Meteorological Agency
Introducing this
measurement method
involves cost because
Japan Meteorological
Agency certification is
required.
The SI value correlates
highly with the measured
seismic intensity and can be
calculated easily, so it is
used by major gas
companies and railroads too.
Others
3
With their high detection accuracy, these Sensors help with measures to
prevent secondary damage after earthquakes in a variety of settings.
Emergency
Actions
Preventing
Secondary Damage
Shutting Off and Stopping
Hazardous Devices
- Semiconductors
- Chemical plants
- Distribution panels
Earthquake
4
Earthquake ends.
Rescue
Determining Damage
Mapping seismic intensity and building collapse information
Vibration Sensor communications enable the collection of
earthquake information to map damage conditions by area.
- Creating suitable restrictions for traffic and
train operation
Prevention
Restoration
- Disaster map creation
5
京公网安备 11010802033920号
EEWORLD
