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A partnership between ArduSimple and u-blox is aiming to .
Last week u-blox released details on the partnership, illuminating the key performance indicators that each party brings to the table.
“ continues to be held back by one key factor: its increased complexity compared to standard-precision positioning,” explains Marc Castillo, senior GNSS consultant for ArduSimple.
This complexity leads to long development windows, which has slowed integration and market adoption. To solve this problem for the ZED-F9P module, u-blox has released a .
The SBC is available in two variants using x2 or x3 ZED-F9P modules, offering either positioning + heading or a full attitude and heading reference system (AHRS).
Based upon corrected data between a rover (moving object) and base station (true fixed object) that calculates the position of an object to within ~2 cm of its true location.
The algorithms compute the true location of the rover utilizing a two-reference differential dataset from the base station and a GNSS satellite.
RTK-enabled base station density dictates the accuracy of these measurements as an indication of true position and is limited to approximately 35 km range. However, .
The “moving base” methodology uses a second rover as a base station and calculates the distance of the target vehicle with respect to the reference rover.
NTRIP, which is a network transport protocol for the , allows corrected data to be delivered to the target vehicle via internet services such as the LTE network.
There are some interesting details engineers can evaluate by digging into the , including security features, independent configuration for multiple GNSS constellations, and details on the RTK RTCM protocol.
Important security features are built into the chip, such as spoofing detection and jamming/interference monitoring. These features are managed as system flags that report to the host device when a potential security threat is present.
The system also features secure boot technology, preventing unauthorized firmware from being initialized on the chip.
The ability to enable/disable specific GNSS signals allows for commercial adoption worldwide on a single chipset. Additionally, the chip allows for up to four concurrent constellations to be enabled. This allows multiple satellites to be used to provide an RTK solution.
Finally, designers can tap into potential power savings by disabling unused constellations; the .
RTCM is a binary protocol used to communicate between the base station and rover unit. RTCM consists of a series of messages sent between the two units providing a stream of correction data.
The rover will begin in RTK floating mode, where positional accuracy is limited to traditional GPS precision (2–5 meters). Once the phase ambiguity between the base station and rover has been calculated (10 seconds < convergence time < 30 seconds), the receiver enters RTK fixed-mode and the accuracy reaches cm-level precision.
With the goal of mass-market adoption in mind, the new simpleRTK2B-SBC provides designers a way to get m-2 GNSS precision on-board quickly. This is another critical technology for ADAS, autonomous cars and drones, and the logistics industry.
Have you used a single-board computer to accelerate your system designs? Let us know in the comments below.