Summary of ULTRA-COMPACT HIGH ACCURACY EARTHQUAKE DETECTION SENSOR MODULE
ROHM introduces the BP3901, an ultra-compact seismic detection sensor module designed for high-accuracy earthquake sensing in applications like smart meters and unmanned vehicles. It integrates a 3-axis accelerometer with a proprietary algorithm to distinguish true earthquakes from external vibrations, reducing false positives. The module also features angle correction capabilities and is optimized for integration into safety infrastructure to prevent secondary disasters.
Parts used in the BP3901:
- BP3901 Sensor Module
- 3-Axis Accelerometer (from Kionix)
- Original Earthquake Detection Algorithm
- Digital Signal Processing Unit
- Angle Correction Function
- False Detection Prevention Function
ROHM announces the availability of an ultra-compact high accuracy seismic detection sensor module, BP3901, which is ideal for applications requiring reliable earthquake detection, such as automatic doors, unmanned transport vehicles, and smart meters.
Functions for accurately detecting vibration when an earthquake occurs and for stopping operation of equipment have garnered increased interest to prevent secondary disasters caused by fires and other factors in the aftermath of an earthquake. Similar functions to quickly detect damage conditions and assist with early recovery are also demanded in various infrastructures such as buildings and roads. However, mechanical earthquake detectors can only detect the presence/absence of vibration, and cannot distinguish whether the vibration is due to an actual earthquake or to other external factors, which often results in false positives.
In response, ROHM developed an ultra-compact (11.8 x 8.6 x 2.5 mm) BP3901 that integrates an original earthquake detection algorithm and offers high accuracy. In addition, a false detection prevention function is built in and it is capable of accurately distinguishing between vibration due to earthquakes or other external factors. It also has an angle correction function (±15° allowable mounting angle) that can correct for unintentional tilt of the module, further improving detection accuracy.
ROHM will continue to develop algorithms optimized for different vibration detection and expand its sensor module lineup. We will also offer total solutions for customer applications that contribute to greater safety and convenience by leveraging wireless technologies, such as Wi-SUN that is optimized for smart meter networks.
Key Features
1. Enables high Accuracy Earthquake Detection in a Compact Module Form Factor
The BP3901 incorporates a 3-axis accelerometer (from ROHM Group company Kionix) in a compact 11.8 x 8.6 x 2.5mm module package. ROHM developed a unique algorithm focused on determining SI (Spectrum Intensity) values. This algorithm features a high correlation with measured seismic intensity data used for earthquake damage assessment while it also optimizes the digital signal processing of acceleration data and calculation parameters/sequence through analysis of measured excitation data. This makes it possible to accurately measure the seismic level, enabling more precise earthquake detection compared with conventional mechanical sensors.
Read more: ULTRA-COMPACT HIGH ACCURACY EARTHQUAKE DETECTION SENSOR MODULE
- What is the primary function of the BP3901 module?
The module enables high accuracy earthquake detection by distinguishing between actual seismic vibrations and other external factors. - How does the BP3901 prevent false detections?
It includes a built-in false detection prevention function that accurately distinguishes vibration due to earthquakes from other causes. - Can the module be installed at an angle?
Yes, it has an angle correction function that allows for an allowable mounting angle of ±15° to correct unintentional tilt. - What are the dimensions of the BP3901 module?
The module is ultra-compact with dimensions of 11.8 x 8.6 x 2.5 mm. - Does the BP3901 use a mechanical sensor?
No, it uses a 3-axis accelerometer and a unique algorithm rather than conventional mechanical sensors. - What technology does ROHM plan to leverage for total solutions?
ROHM plans to leverage wireless technologies such as Wi-SUN which is optimized for smart meter networks. - Why is accurate vibration detection important for buildings?
Accurate detection helps prevent secondary disasters caused by fires and assists with early recovery in infrastructures. - What specific value does the algorithm calculate?
The algorithm focuses on determining SI or Spectrum Intensity values which correlate with measured seismic intensity data.
