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configuration:gnss-dr [2021/07/08 11:54] fachet |
configuration:gnss-dr [2021/11/26 12:31] (current) dodenhoeft ↷ Page moved from tools:gnss-dr to configuration:gnss-dr |
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| - | ====== Introduction ====== | + | ====== Untethered GNSS Dead Reckoning Installation Guide ====== |
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| + | ===== Introduction ===== | ||
| Location service based on satellite link depends heavily on weather conditions and on the surroundings. Especially in dense urban environment, depots or tunnels, the satellite signal is obstructed and limits the performance of standard GNSS, therefore, a reliable position of the vehicle is not guaranteed. | Location service based on satellite link depends heavily on weather conditions and on the surroundings. Especially in dense urban environment, depots or tunnels, the satellite signal is obstructed and limits the performance of standard GNSS, therefore, a reliable position of the vehicle is not guaranteed. | ||
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| Gyroscope and accelerometer are integrated in the chipset – there is no need to add additional sensors, cabling, … to the installation. This operation mode is called Untethered Dead Reckoning (UDR) mode and is supported as standard feature. | Gyroscope and accelerometer are integrated in the chipset – there is no need to add additional sensors, cabling, … to the installation. This operation mode is called Untethered Dead Reckoning (UDR) mode and is supported as standard feature. | ||
| - | ====== Configuration ====== | + | ===== Configuration ===== |
| - | **Attention: Enabling a misconfigured GNSS with dead reckoning will lead to unusable GNSS performance, even under clear sky with satellite reception!** | + | |
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| + | Caution: Activating GNSS dead reckoning with incorrect paramters will result in unusable GNSS performance, even in clear skies with satellite reception! | ||
| - Install the device tight in the final position. Be aware of: | - Install the device tight in the final position. Be aware of: | ||
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| - Insert the x,y,z distances [m] into the **VRP-to-Antenna** and **VRP-to-IMU** lever arm lever arm fields in the GNSS configuration page {{ :tools:gnss_udr_reference.png?600 |}} {{ :tools:gnss_udr_c3a.png?600 |}} | - Insert the x,y,z distances [m] into the **VRP-to-Antenna** and **VRP-to-IMU** lever arm lever arm fields in the GNSS configuration page {{ :tools:gnss_udr_reference.png?600 |}} {{ :tools:gnss_udr_c3a.png?600 |}} | ||
| - Set values yaw, pitch, and roll of the IMU (NetModule router/device) | - Set values yaw, pitch, and roll of the IMU (NetModule router/device) | ||
| + | - For **Rail Vehicle** , the parameters must be entered manually. Please determine the exact installation position in relation to the vehicle, e.g. using CAD data, in order to achieve an optimum result. The [[https://imu.see5.cyon.site/|GNSS IMU Alignment]] visualisation tool helps to check the parameters. | ||
| - For **Street Vehicles** use the auto-alignment feature to derive the values automatically. Please follow the procedure: | - For **Street Vehicles** use the auto-alignment feature to derive the values automatically. Please follow the procedure: | ||
| - Prepare the vehicle for a test drive. | - Prepare the vehicle for a test drive. | ||
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| - Drive as many turns in both directions as possible und clear sky with satellite reception. Think of driving an 8 with your vehicle.{{ :tools:gnss_udr_calibration.png?600 |}} | - Drive as many turns in both directions as possible und clear sky with satellite reception. Think of driving an 8 with your vehicle.{{ :tools:gnss_udr_calibration.png?600 |}} | ||
| - Monitor the auto-alignment status, once it reaches fusion/3D fix, you find the auto detected yaw, pitch, and roll values already in the configuration page. {{ :tools:gnss_udr_c3c.png?600 |}} | - Monitor the auto-alignment status, once it reaches fusion/3D fix, you find the auto detected yaw, pitch, and roll values already in the configuration page. {{ :tools:gnss_udr_c3c.png?600 |}} | ||
| - | - Press the **[save]** button to permanently store the alignment values. | + | - Press the **[Apply]** button to permanently store the alignment values. |
| - | - For **Rail Vehicle** use the GNSS IMU Alignment page [[https://imu.see5.cyon.site/|External Link]] to derive the alignment values manually. | + | - The GNSS-DR chip may keep the last position even if the device is switched off. This leads to faster availability of a FIX with a reliable position after a restart.{{ :tools:gnss_udr_c3d.png?600 |}} |
| - | - The GNSS-DR chip may keep the last position even if the device is switched off. This leads to faster availability of a FIX with a reliable position after a restart. | + | On the NG800 the GNSS chip enters a sleep mode if the device is shut down (=IGN/KL15 off) and permanent power (=KL30) is available. Do not enable any of the GNSS Store DR Calibration options for NG800. It may lead to misleading positions if the position and time is saved while the vehicle is still moving. |
| - | On the NG800 the GNSS chip enters a sleep mode if the device is shut down (=IGN/KL15 off) but permanent power (=KL30) is available. | + | |
| - | {{ :tools:gnss_udr_c3d.png?600 |}} | + | |
| - | **Attention: Do not enable any of the GNSS Store DR Calibration options for NG800. It may lead to misleading positions if the position and time is saved while the vehicle is still moving.** | + | |