Last Updated: June 2020

Purpose: To show what steps to take in order to use the available encoder in the INS.

There are two hardware options for encoder connections. Either the use can use encoder lines used to connect to Ethernet lines in the Multiport Development Kit (which connects to INS) or use encoder lines and connect them to the COM1 port on the Multiport Development Kit which is an RS-422 interface. You can contact Inertial Labs to order an INS unit with encoder input support and select the preferable connection option.

Topics: INS, COM, Hardware, encoder

Last Updated: June 2020

Purpose: To provide users with some of the commonly used equations for the Wave Sensor as well as provide other equations that may be helpful in implementing the sensor for the specific end-user application.

Topics: Sensor, Wave, Equations

Purpose: The purpose of this Knowledge Base document is to inform end-users of the methods that are used by Inertial Labs for determining Angular Random Walk, Velocity Random Walk and Bias Instability for the MEMS-based Accelerometers and Gyroscopes used by Inertial Labs in the IMU-P.

Topics: IMU-P, Velocity, ARW, Angular, Random, Walk, VRW, Bias, Instability

Purpose: The purpose of this knowledge base article is to explain the method of integration known as Coning and Sculling used by Inertial Labs.

Updated: March, 2020

For strap-down based inertial sensors, the method of integration known as sculling (for linear accelerations) and coning (for angular rates) has been implemented for all Inertial Labs sensing components to reduce the erroneous build up of seemingly valid measurements of accelerations and angular rates. These errors, if left unaccounted for then produce further errors in calculations for velocity and attitude in inertial based navigation systems and attitude and heading reference units.

Topics: Coning, Integration, Methods, Sculling

Purpose: The purpose of this Knowledge Base article to is outline a few commonly seen issues and fixes that surround large GNSS position errors seen internationally. It is important to note that these issues are not at the fault of Inertial Labs products, but satellite line of sight issues, and satellite correction services.

Topics: MRU, INS, receiver, Error, Position, EGNOS, WS, SBAS, Correction

Purpose: The purpose of this Knowledge Base article is to show how information is used from respective sensors inside the Inertial Navigation System. Although a complex product, this diagram breaks down the different functions and explains how data is used and how it can be accessed on the device.

Topics: INS, Data, Flowchart, Flow, Communication, Ports, COM

Purpose: The purpose of the this knowledge base document is to explain the potential interference caused by ports such as USB3.0 in interfering with satellite line of sight (LOS).

Last Updated: March, 2020

High-frequency devices, like high-speed processors or high-speed communication buses (say, USB3 or PCIExpress) are known to produce electromagnetic interference (EMI) in the 1.2 – 1.5 GHz range, where all GNSS signals reside.

Topics: USB, INS, Interference, Satellite, EMI

Purpose: To give insight for the potential user on a commonly seen misunderstanding in the difference between UTC and GPS timestamps.

Last Updated: March, 2020

 

Customer:

I have found one issue that I am currently confused with. The timestamp recorded from COM1 of the INS is consistently 17-20 seconds fast. If I start recording at 00 seconds, the first timestamp is equal to 17+ seconds, however the location data that comes from the GPS receiver is correct for 00 seconds and not 17+ seconds. Any insights into this issue?

Topics: INS, GPS, Difference, UTC, Time, Offset, Position

Purpose: To direct product users to the LabVIEW drivers for the Inertial Labs IMU-P, MRU and INS.

Topics: MRU, IMU, INS, Driver, LabVIEW

Purpose: To diagnose the common issue of a user being able to connect to an Inertial Labs Inertial Navigation System using Windows 10 but when using a different operating system, such as Windows 7, the unit will not connect.

Topics: INS, Driver, FT230x, Error, Windows, 7, 10