Wireless GPS Sensor
Description
The Shimmer GPS expansion module (daughter-board) provides accurate location and global time data for a vast array of Shimmer sensing applications with minimal software development. This is combined with ambient data via a pressure/temperature sensor integrated onto the GPS daughter-board. When combined with the Shimmer platform’s integrated accelerometer the assembled unit provides MEMS sensor technology and along with an embedded GPS receiver, ambient temperature, and barometric pressure sensing. GPS data is in NMEA format, and provides high position, accurate speed and course over ground, and high sensitivity for optimal performance in urban conditions.Technical Highlights
- GPS: Globaltop FGPMMOPA6: Position Accuracy, <3.0m; Timing Accuracy, 100ns
- Pressure: Bosch BMP085: Range, 300-1100hPa; Resolution, .01hPa
- Temperature: Bosch BMP085: Range, 0 - 65 +/-2°C; Resolution, .1°C
Features and Benefits
Real Time Data- Stream/Log GPS data combined with accelerometer data
- Precise location and global time data for vast array of applications
- GPS integration rectifying standard IMU challenges
- The module output provides data sentences in the GGA, GSA, GSV, RMC, and VTG formats, which are easily filtered in software
- Supported by the Shimmer LabVIEW Library
- Low profile enclosure, lightweight and robust
- Easy to integrate (OEM) GPS sensing solution
- Low power barometric pressure/temperature sensor
- Designed to be wearable, provides full mobility either as a wireless transmitter or autonomous data logger
- Real-time signal viewing on computer (or other data acquisition system) or store to microSD card for later download and analysis
- Small size and weight of 25g provides unrestricted movement, use on any body segment, and ideal for athletes, children, elderly, or patients with a disability
- Offers greater ergonomic value than larger units
- Easily combine GPS data with Shimmer’s integrated accelerometer for greater contextual information
- Easily combine GPS data with the full range of Shimmer Biophysical, Kinematic and Ambient sensor modules
- MSP430 microcontroller (8mHZ, 16 Bit), Bluetooth – RN-42, 802.15.4 radio - TI CC2420, Integrated 2GB micro SD card, 450mAh rechargeable Li-ion battery, stylish enclosure, wearable and highly configurable to user/developer’s specific needs
Applications
The Shimmer GPS/PRES expansion module has a broad range of application uses including:- Tracking of people and objects
- Sports/Player analytics and Informatics
- Environmental Sensing
- Maritime Monitoring
- Situational Awareness
- Globally synchronized sensing systems
GPS/PRES Sensor Specifications
1 x GPS Daughter Board
1 x GPS Top Enclosure
GPS*
Global Top
Position Accuracy: <3.0m
Timing Accuracy: 100ns
GPS Radio:
• L1 Frequency, C/A code, 66 Channels
• DGPS/SBAS Support
• Max update rate 10Hz (1 Hz default/recommended)
Interface:
• NMEA 0183 v3.01 and MTK NMEA command protocols
• 115200 bps, 8 data bits, no parity, 1 stop bit
Typical Acquisition time (open-sky, stationary):
• ~1.0s "Hot" 35s "Warm", "Cold" (see MTK3329 datasheet)
Pressure*
Range: 300-1100hPa
Resolution: .01hPa
Communication: I2C, 16 to 19bit data
Conversion time**:
• 3-4.5ms ultra low power mode
• 5-7.5ms standard mode
• 9-13.5ms high res. mode
• 17-26ms ultra high res. mode
Temperature*:
Range: 0 - 65 +/-2°C
Resolution: .1°C
Communication: I2C, 16bit data
Conversion time**:
• 3-4.5ms ultra low power mode
• 5-7.5ms standard mode
• 9-13.5ms high res. mode
• 17-26ms ultra high res. mode
*Calculated specification, exact value subject to environmental and component variation.
** Maximum sample rate is limited by I2C bus bandwidth, tested to 10Hz.
