D7S Vibration Sensor
D7S is the world's smallest class IoT-friendly high precision Seismic 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.
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.
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
Semiconductors, FPD, Machine Tools, Control Panels, Incinerators, Printers
Homes
Distribution Panels, Fire-prevention Systems, Home Appliances (Heaters, Gas Stoves)
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.
