Sensing Solutions for Structural Health Monitoring
In the field of Structural Health Monitoring (SHM), high-precision sensing technology is essential. Epson provides low-noise sensors suitable for bridge deflection measurement and integrity evaluation of large structures such as skyscrapers. We also offer extensive reference information to support measurement, evaluation, and product integration.
Case 1: Measuring Bridge Deflection and Displacement
In bridge maintenance, displacement is a critical indicator used for serviceability evaluation based on the "allowable deflection" defined in the Road Bridge Specifications by Japan's Ministry of Land, Infrastructure, Transport and Tourism.
Typically, displacement measurement for bridges uses contact-type or laser-type displacement sensors. However, these methods face challenges such as securing reference points and weather-related influences.
By using high-precision accelerometers, displacement can be measured easily without reference points and without being affected by environmental conditions.
Recommended Products
Epson's quartz-based accelerometers offer the following features ideal for displacement calculation:
- Low self-noise and minimal integration error
- Compact size for easy installation
- Low power consumption for simplified power supply
| Product Name |
Brief sheet |
Size [mm] |
Weight [g] |
Type | Interface | Detection axis |
Output Mode Selection (each axis) |
Output Dynamic Range |
Noise Density [μG/√Hz] |
Bias Temperature Error [mG] |
Bias Repeatability [mG] |
Frequency Response Characteristics [Hz] |
Power Consumption [mA] |
Power Supply [V] |
Operating Temp [℃] |
Material | Host Connector |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| M-A352AD10 |  |
 48 x 24 x 16 |
25 | Built-in | SPI/UART | 3 | Acceleration/Tilt Angle | Acceleration:±15G Tilt Angle:±1.047 rad(±60deg) |
0.2 (0.5 to 6Hz) |
±2 (-30℃ to 85℃) |
3 (Typ) for one year after shipment |
DC to 460 | 13.2 @3.3 V | 3.15 to 3.45 | -30 to +85 | Aluminum die casting | Receptacle connector (1.00mm) |
| M-A552AC10 | |
 65 x 60 x 30 |
128 | Waterproof & Dust proof (IP67) |
CANopen | 3 | Acceleration/Tilt Angle | Acceleration:±15G Tilt Angle:±1.047 rad(±60deg) |
0.5 (0.5 to 6Hz) |
±4 (@25℃) | 3 (Typ) for one year after shipment |
DC to 460 | 35 @12V | 9 to 32 | -30 to +70 | Aluminum die casting | M12, 5pin-male connector |
| M-A552AR10 | |
 65 x 60 x 30 |
128 | Waterproof & Dust proof (IP67) |
RS422 | 3 | Acceleration/Tilt Angle | Acceleration:±15G Tilt Angle:±1.047 rad(±60deg) |
0.5 (0.5 to 6Hz) |
±4 (@25℃) | 3 (Typ) for one year after shipment |
DC to 460 | 40 @12V | 9 to 32 | -30 to +70 | Aluminum die casting | M12, 8pin-male connector |
For data sheets or purchase inquiries, please contact us via the inquiry form.
Measurement Tools & Examples Configurations
For easy evaluation of sensors using your PC:
- Measurement software and board for controlling sensors from PCs or microcontroller boards.
- Software for estimating bridge displacement from acceleration data.
For building a measurement and remote monitoring system using Raspberry Pi:
Use Cases
Case 2: Evaluating the Integrity of Large Structures such as High-Rise Buildings
High-rise buildings generally have long natural periods and tend to resonate with long-period vibrations. For structural integrity evaluation, sensors capable of accurately measuring such long-period and small-amplitude vibrations are essential.
Epson's quartz-based accelerometers can measure long-period vibrations with low noise, making them ideal for structural health monitoring.
Recommended Products
Key features of Epson quartz accelerometers:
- Capable of DC measurement
- Compact and easy to install
- Low power consumption for simplified power supply
- Multi-node synchronization via external trigger (M-A370)
| Product Name |
Brief sheet |
Size [mm] |
Weight [g] |
Type | Interface | Detection axis |
Output Mode Selection (each axis) |
Output Dynamic Range |
Noise Density [μG/√Hz] |
Bias Temperature Error [mG] |
Bias Repeatability [mG] |
Frequency Response Characteristics [Hz] |
Power Consumption [mA] |
Power Supply [V] |
Operating Temp [℃] |
Material | Host Connector |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| M-A370AD10 | |
 48 x 24 x 16 |
29 | Built-in | SPI/UART | 3 | Acceleration/Tilt Angle | Acceleration:±10G Tilt Angle:±1.047 rad(±60deg) |
0.02 (1 to 10Hz) |
±0.5 (-30℃ to 85℃) |
±0.1 (Typ) for one year after shipment |
DC to 210 | 36.3 @3.3 V | 3.15 to 3.45 | -30 to +85 | Aluminum die casting | Receptacle connector (1.00mm) |
| M-A352AD10 | |
48 x 24 x 16 |
25 | Built-in | SPI/UART | 3 | Acceleration/Tilt Angle | Acceleration:±15G Tilt Angle:±1.047 rad(±60deg) |
0.2 (0.5 to 6Hz) |
±2 (-30℃ to 85℃) |
3 (Typ) for one year after shipment |
DC to 460 | 13.2 @3.3 V | 3.15 to 3.45 | -30 to +85 | Aluminum die casting | Receptacle connector (1.00mm) |
| M-A552AC10 | |
65 x 60 x 30 |
128 | Waterproof & Dust proof (IP67) |
CANopen | 3 | Acceleration/Tilt Angle | Acceleration:±15G Tilt Angle:±1.047 rad(±60deg) |
0.5 (0.5 to 6Hz) |
±4 (@25℃) | 3 (Typ) for one year after shipment |
DC to 460 | 35 @12V | 9 to 32 | -30 to +70 | Aluminum die casting | M12, 5pin-male connector |
| M-A552AR10 | |
65 x 60 x 30 |
128 | Waterproof & Dust proof (IP67) |
RS422 | 3 | Acceleration/Tilt Angle | Acceleration:±15G Tilt Angle:±1.047 rad(±60deg) |
0.5 (0.5 to 6Hz) |
±4 (@25℃) | 3 (Typ) for one year after shipment |
DC to 460 | 40 @12V | 9 to 32 | -30 to +70 | Aluminum die casting | M12, 8pin-male connector |
For data sheets or purchase inquiries, please contact us via the inquiry form.
Measurement Tools & Example Configurations
For easy evaluation of sensors using your PC:
For building a measurement and remote monitoring system using Raspberry Pi:
Use Cases
Contact Us
For product purchases, inquiries, or documentation requests, please contact us via the inquiry form.
