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.

Ultra

Compact

High

Precision

IoT

Friendly

The Best for Embedding in Equipment

Maximum acceleration

Overview

Calculation load

Maximum acceleration value

Calculated from the

acceleration

Average value of the

shaking velocity

Small

Large

Small to medium

Correlation with

structural damage

Correlation with the

Japan Meteorological

Agency’s earthquake level

Empirical formula

set by the Japan

Meteorological Agency

Others

Seismic intensity scale of Japan

SI value

Comparison of SI Values and Acceleration

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 D7S can be embedded in essentially any device thanks to

its ultra-small size and ultra-low consumption to contribute to

package downsizing.

Earthquake Maps and Rescue Maps

original applications.

Rejects Impulse Vibration Noise

Spectral intensity (SI) high-precision earthquake indicator,

which correlates highly with damage to structures.

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.

Introducing this

measurement method

involves cost because

Japan Meteorological

Agency certification is

required.

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