Overview
The P-1775 IMU from KVH Industries is a photonic inertial measurement unit that provides improved reliability and durability over competing technologies. The high-performing P-1775 IMU offers an advanced inertial sensor system and is designed for systems and applications where very high bandwidth, low latency and low drift are critical.
The P-1775 IMU leverages the proven technology of the DSP-1760 fiber optic gyro (FOG), the world’s smallest high-performance FOG.
These FOGs are then integrated with three very low noise 10g or 25g accelerometers, as well as a 3-axis magnetometer for automatic gyro bias compensation even in environments with strong local magnetic fields. The P-1775 IMU with 25g accelerometers is ideal for highly dynamic applications and/or in applications with high levels of acceleration, vibration or shock.
KVH’s new PIC technology reimagines FOG technology by replacing individual fiber components with an innovative integrated planar optic chip. This results in a FOG that’s even more reliable and delivers superior repeatability unit-to-unit. With three of these integrated photonic gyros at its core, the P-1775 IMU provides the safe, accurate performance autonomous platforms demand.
All KVH high-performance IMUs offer the same robust, compact package designed for drop-in replacement for many available IMUs. The flexible interface and programmable message outputs simplify the integration of the P-1775 IMU. The P-1775 IMU offers ease of integration for designers of higher-level inertial navigation, guidance, or stabilization systems by offering user-programmable features, including an adjustable baud rate so that communication latency can be adjusted to receive accurate, timely data. Ideal applications for the P-1775 IMU include those with challenging environments such as drilling, mining, pipeline inspection and maintenance, mobile mapping systems, and stabilization systems for radar, LIDAR, and high-speed gimbals.
Features
- All-new, exclusive photonic integrated chip (PIC) technology
- Available with either 10g or 25g accelerometers
- Highest performing IMU from KVH
- Extremely high bandwidth (≥1000 Hz)
- User-programmable data rates from 1 to 5000 Hz
- ≤500 µs Total Motion-to-Output Latency
- User-configurable baud rate from 9.6 Kbps to 4147 Kbps to minimize communication latency and receive data faster
- Asynchronous RS-422 protocol, full differential interface
- 3-axis magnetometer for magnetic field compensation
- Compact and lightweight – < 0.7 kg (1.5 lbs.)
Applications
- The most demanding autonomous platforms
- Pipeline inspection and maintenance
- Drilling and mining
- High-speed gimbal stabilization
- Stabilization systems for LIDAR, EO/FLIR
- GNSS-aiding inertial navigation
- Manned and unmanned platform stabilization and navigation
- Augmented reality and mobile mapping
- Guidance and control
- Precision pointing and positioning
Technical Specifications
| Performance Specifications | ||
| Input Rate (max): | ±490°/sec | |
| Bias Instability (25°C): | ≤0.05°/hr, 1σ (typical) ≤0.1°/hr, 1σ (max) |
|
| Bias vs. Temp. (≤1°C/min): | ≤0.7°/hr, 1σ (typical) ≤1°/hr, 1σ (max) |
|
| Bias Offset (25°C) | ±0.5°/hr | |
| Scale Factor Non-linearity (full rate, 25°C): | ≤50 ppm, 1σ | |
| Scale Factor vs. Temperature (≤1°C/min): | ≤100 ppm, 1σ | |
| Angle Random Walk (25°C): | ≤0.012°/√hr (≤0.7°/hr/√Hz) | |
| Bandwidth (-3 dB) | ≥1000 Hz | |
| Accelerometers | ||
| 10g | 25g | |
| Input Limit (max): | ±10g | ±25g |
| Bias Instability (constant temp): | ≤0.05 mg, 1σ | ≤0.05 mg, 1σ |
| Bias Offset: | ±0.5 mg | ±0.25 mg |
| Bias Temp Sensitivity: | 0.5 mg, 1σ (typical) 1.0 mg, 1σ (max) |
0.42 mg, 1σ (typical) 1.25 mg, 1σ (max) |
| Scale Factor vs. Temperature Sensitivity (full scale, full temp): | ≤500 ppm/°C, 1σ max | ≤500 ppm/°C, 1σ max |
| Velocity Random Walk (25°C): | ≤0.12mg/√Hz, (0.23ft/sec/√hr) | ≤0.12mg/√Hz, (0.23ft/sec/√hr) |
| Bandwidth (-3 dB): | 200 Hz | 450 Hz |
| Magnetometers | ||
| 10g | 25g | |
| Input Range: | ±10 Gauss | ±10 Gauss |
| Bias: | <0.2 Gauss | <0.2 Gauss |
| Bias Noise (rms): | <2 mGauss | <2 mGauss |
| Environment | ||
| 10g | 25g | |
| Temperature (operating): | -40°C to +75°C (-40°F to +167°F) |
-40°C to +75°C (-40°F to +167°F) |
| Shock (operating): | 9g 11 ms, sawtooth | 25g 11 ms, sawtooth |
| Vibration (operating): | 8g rms 20-2000 Hz random | 15g rms 20-2000 Hz random |
| Electrical/Mechanical | ||
| Initialization Time (valid data): | ≤1.5 sec | |
| Data Interface: | RS-422, Full Differential Asynchronous or Synchronous |
|
| Baud Rate: | Selectable 9.6 Kbps to 4147 Kbps | |
| Data Rate: | User-selectable 1 to 5000 Hz | |
| Dimensions (max): | 88.9 mm (D) x 73.7 mm (H) (3.5 inches x 2.9 inches) | |
| Weight (max): | 0.7 kg (1.5 lbs) | |
| Power Consumption: | 5 W (typical), 8 W (max) | |
| Input Voltage: | +9 to +36 VDC | |
Ordering
The P-1775 IMU from KVH Industries is available through Canal Geomatics. If you would like to learn more about it, please use the Request Pricing form to get in touch with us.
