D7S Vibration Sensor

D7S is the world's smallest class IoT-friendly high precision Seismic Sensor.

D7S Vibration Sensor

Features

Compact & High-precision Seismic Sensors

Reducing Secondary Disasters from Earthquakes

D7S is the world's smallest class IoT-friendly high precision Seismic Sensor.
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.

Features of D7S
D7S Vibration Sensor

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
Relationship between SI Value and Measured Seismic Intensity Equivalent Value

Relationship between SI Value and Measured Seismic Intensity Equivalent Value

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.

Item Overview Calculation load Correlation with structural damage Correlation with the Japan Meteorological Agency’s earthquake level Others
Maximum acceleration Maximum acceleration value Small
Seismic intensity scale of Japan Calculated from the acceleration Large Empirical formula set by the Japan Meteorological Agency Introducing this measurement method involves cost because Japan Meteorological Agency certification is required.
SI value Average value of the shaking velocity Small to medium 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.

Application Examples

The world's smallest class of Seismic Sensors supports a wide range of applications.
The D7S is ideal for embedding in equipment.

Industry

Application Examples: Industry

Semiconductors, FPD, Machine Tools, Control Panels, Incinerators, Printers

Homes

Application Examples: Homes

Distribution Panels, Fire-prevention Systems, Home Appliances (Heaters, Gas Stoves)

Society

Application Examples: Society

Electricity Meters, Gas Meters, Chemical Plants, Expressways, Bridges, Tunnels, Railroads

Examples of Vibration Sensor Applications

With their high detection accuracy, these Sensors help with measures to prevent secondary damage after earthquakes in a variety of settings.

Examples of Vibration Sensor Applications