ADMA-Speed: Precise Speed and Braking Distance Sensor
ADMA-Speed is a GNSS speed sensor with integrated inertial sensors. It is optimized for brake tests. For easy installation, the inertial sensors are integrated in the GNSS antenna.
All motion data of the vehicle is calculated by means of the tried and tested ADMA technology. In the basic version acceleration, speed and braking distance is transmitted via the CAN and Ethernet interface. ADMA-Speed eliminates the known disadvantages of GNSS speed sensors.
Technical data for ADMA-Slim can be found in the tables below or in the data sheet.
At a glance
GNSS speed sensor optimized for brake tests
ADMA-Speed eliminates the known disadvantages of GNSS speed sensors
ADMA-Speed can be expanded to a full-fledged GNSS-aided inertial system
Validation of driver assistance systems e.g. ACC, FCW, AEB (VRU, Car2Car), LSS (LDW, LKA) Chassis adjustment
ADMA-Speed highlights
- User-friendly handling thanks to the combination of GNSS antenna and inertial sensors in one housing
- Mounting by means of powerful magnets on the vehicle roof
- Pitch compensation during braking
- Considerably smoother speed signal in comparison to GNSS
- Compensation of GNSS data latency
- Correction of acceleration-dependent GNSS signal distortion
- Speed calculation at the vehicle center of gravity
- Data processing unit with tried and tested Kalman filter technology
- Output of acceleration, speed and braking distance via CAN interface in real-time (up to 1 kHz)
- Speed and signal-triggered braking distance
- Signal inputs for braking trigger or light barrier
Options and accessories
Optionally, ADMA-Speed can be expanded to a full-fledged GNSS-aided inertial system, e.g. for vehicle dynamics testing or verification of ADAS systems.
- Output of lateral deviation
- Output of all motion states (acceleration, velocity, position, angular rate, angle)
- 2 antenna version for course angle without initialization
- 2 cm position accuracy
- Data output rate 1 kHz
- Relative data calculation (e.g. range) via WiFi in real-time for multi-vehicle operation
Technical data
Data processing unit ADMA-Speed
| GNSS-RECEIVER | |
| Position accuracy | 0.01 / 0.2 / 0.4 / 0.6 / 1.2 / 1.5 m (depending on license model and DGPS corrections) |
| Data update rate | up to 50 msec (internally interpolated from 20 to 2.5 msec, optionally 1 msec) |
| WAAS / EGNOS-DGPS correction | via satellite |
| DGNSS correction | via NTRIP / RF modem |
| RTK2-DGPS | via NTRIP / RF modem (optional) |
| Satellite tracking | GPS single antenna (standard) |
| GLONASS / Galileo / BeiDou / L-Band | optional |
| Dual antenna version | optional |
| – | |
| SYSTEM PERFORMANCE | |
| Angle measuring range heading/roll/pitch | ± 180 / 60 / 60° |
| Angle measuring accuracy roll & pitch / heading / slip | 0.02 (1σ) / 0.05 (1σ) / 0.15° RMS |
| Angle resolution | 0.005° |
| Velocity accuracy* | 0.04 km/h RMS |
| Lateral velocity* | 0.2 % RMS |
| GNSS outage position error* | after 10 / 30 / 60 sec: 0.4 / 5.0 / 40.0 m RMS |
| GNSS outage velocity error* | after 10 / 30 / 60 sec: 0.06 / 0.5 / 1.8 m/sec RMS |
| GNSS outage pitch / roll angle error* | after 10 / 30 / 60 sec: 0.05 / 0.15 / 0.35 ° RMS |
| GNSS outage heading angle error* | after 10 / 30 / 60 sec: 0.1 / 0.3 / 0.5 ° RMS |
| Data update rate / calculation latency | 50 – 400 Hz (up to 1000 Hz optional) / 1 ms |
| Stopping distance accuracy* | 5 cm RMS |
| – | |
| INTERFACES | |
| Ethernet 1 | 1 Gbit, for data output, configuration and firmware update |
| Ethernet 2 | 1 Gbit, for driving robot, output |
| Ethernet 3 | 1 Gbit, optional for relative data calculation (e.g. range) and DGPS routing, input/output |
| CAN | CAN 2b, 1 Mbit, for data output |
| Signal inputs | 3 TTL, galvanically isolated (e.g. for light barrier or brake trigger) |
| Signal output | 4 TTL, galvanically isolated (e.g. for synchronization and error indication) |
| GNSS antenna input | 1, optional 2 |
| IMU Eingang | 1 (ADMA components only) |
| DGNSS correction data input | 1 (NTRIP/RF modem interface) |
| – | |
| MISCELLANEOUS | |
| Initial alignment | with internal GPS receiver |
| Power supply | 12 VDC nominal (9-32 VDC), 18 Watt typ. with ADMA-Speed-Ant, without other devices |
| Dimensions (W x L x H) | 225 x 235 x 75 mm |
| Weight | 2.3 kg |
| Protection class | IP 50 (IP 65 on request) |
| Temperature range (operational) | -20 to +60° C |
Sensor unit ADMA-Speed-ANT
| GYROS | |
| Quantity / Type | 3 MEMS gyros |
| Measurement range | ± 450 °/s |
| Resolution | 3 x 10-7 °/s |
| Bias temperature drift typically | ± 0.0025 °/s / °C (1σ) |
| In-run-bias typically | 6 °/h (1σ) |
| Gyro noise typically | 0.4 °/√h |
| Scale factor | ±1 % |
| Sensor bandwidth | 330 Hz |
| – | |
| ACCELEROMETERS | |
| Quantity / Type | 3 MEMS accelerometers |
| Measurement range | ± 5 g, optional ± 10 g |
| Measurement accuracy | better than 5 mg (without Kalman filter corrections) |
| In-run-bias typically | 32 μg (1σ) |
| Measurement resolution | 12.2 ng |
| Sensor bandwidth | 330 Hz |
| – | |
| SATELLITE RECEPTION | |
| ADMA-Speed-Ant-GG1 (standard) | GPS L1, GLONASS L1, GALILEO E1/E2/L6, Compass B1, IRNSS L1, L-Band |
| ADMA-Speed-Ant-GG2 (optional) | GPS L1/L2/L5, GLONASS L1/L2, GALILEO E1/E2/E5/E5a/E5b/E6/L6, Compass B1/B3, IRNSS L1/L5, L-Band |
| – | |
| MISCELLANEOUS | |
| Dimensions (B x T x H) | 110 x 130 x 70 mm (with magnets), 87 x 130 x 60 mm (without magnets) |
| Weight | 0.75 kg |
| Protection class | IP 67 |
| Temperature range | -40 to +85 °C |
