Structural Health Monitoring System (SHMS)
The Structural Health Monitoring System (SHMS) is SEI’s airborne solution for tracking structural performance as part of its Health and Usage Monitoring System (HUMS).
With a compact, lightweight design and low power requirements, SHMS includes a Data Acquisition and Processing Unit (DAPU), Data Storage Unit (DSU), and optional Control/Display Unit (CDU), offering a versatile, high-performance platform for capturing, storing, and viewing critical structural data in flight.
Description
Structural Health Monitoring System (SHMS)
SHMS is the airborne portion of SEI’s Health and Usage Monitoring System (HUMS). It consists of a Data Acquisition and Processing Unit (DAPU), a Data Storage Unit (DSU), and an optional Control/Display Unit (CDU).
The DAPU has analog, discrete, and strain gauge inputs, discrete outputs, as well as RS-422 and ARINC 429 data buses.
The DSU has 128 Mb of non-volatile memory, expandable to 256 Mb.
The CDU has 16 keys and a 2-line, 16-character display, dimmable along with aircraft instruments. The SHMS's low power consumption, light weight, and small size allow for easy aircraft installation.
Built to RTCA/DO-160D
Key features
- Twenty-six strain gauge inputs
- +10 Vdc strain sensor excitation output
- Six ±10 VDC differential inputs
- Two RS-422 / One RS-232 ports
- Four Rx / Two Tx ARINC 429 ports
- Four high / four low-level discrete inputs
- Four high / four low-level discrete outputs
SUMMARY SPECIFICATIONS: DAPU
| Input voltage: | +18 to 36 VDC |
| Power consumption: | < 3 Watts |
| Weight: | < 6 pounds |
| Strain gauge inputs (26): | ±51.25 mV |
| Strain gauge excitation: | +10 Vdc @ 500 mA |
| Analog channels (6): | ± 10 Vdc differential |
| Communication interfaces: | RS-232 (1) RS-422 (2) ARINC 429 Rx (4) ARINC 429 Tx (2) |
| Memory capacity: | 128 Mb Flash Expandable to 256 Mb |
| Discrete inputs (8): | Open/+28 Vdc (4) Ground/open (4) |
| Discrete outputs (8): | Open/ground (4) Open/+28 Vdc (4) |
| Operating environment: | -40°C to +71°C |
SUMMARY SPECIFICATIONS: CDU
| Input voltage: | +18 to 36 VDC |
| Power consumption: | < 3 Watts |
| Weight: | < 2.5 pounds |
| Keypad: | 16 Keys Tactile Feedback Membrane Keys Green Backlighting |
| Display: | Two Lines 16 Characters Per Line Alphanumeric and Symbols 16 Programmable Symbols Green LED |
| Dimming: | Keypad and Display 0 to 5 Vdc 0 to 110 Vac optional |
| Communication interfaces: | (1) RS-232 (2) RS-422 |
| Operating environment: | -40°C to +55°C |