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For a development project we needed the speed of an agricultural vehicle with a sampling frequency of at least 20 Hz. There are different possibilities for this; Radar sensors or encoders can be integrated into the vehicle with appropriate effort. We finally decided on a GPS receiver (or GNSS receiver) with an IMU (Inertial Measurement Unit: three-axis gyro and acceleration sensors) and an integrated Kalman filter. We came across the 3DM-GX5-45 from LORD, which includes all of these functions.


The built-in GNSS receiver updates the position or speed value at 4 Hz. However, this update frequency is too low for the specific measurement application, for example to analyze the braking behavior of the vehicle. This is why the acceleration or gyro sensors placed in the x, y and z directions are used, which are sampled at 1 kHz and are available to the Kalman filter in addition to the GNSS signal. The Kalman filter thus determines the position and speed of the vehicle, which is available at the output of the 3DM-GX5-45 at 100 Hz.

Geschwindigkeit KalmanFilter

The 3DM-GX5-45 was integrated into a measurement and evaluation system using the PLCnext Control AXC F 3152 PLC from Phoenix Contact. The evaluation tool for all and additional measured values ​​was programmed with LabVIEW. Various test drives with passenger vehicles and an agricultural vehicle show plausible speed data, whereby the correct settings of the 3DM-GX5-45 and correct handling are crucial.

Geschwindigkeit Messdaten

Projects

Aucodys Makes It Possible

Aucodys Makes It Possible

As an engineering office in the Winterthur area, engineering around LabVIEW and MATLAB/Simulink is our strength. That's why we are MathWorks partners and have extensive know-how in LabVIEW programming.

Projects:

Position and speed measurement with the GPS receiver 3DM-GX5-45 from LORD

Position and speed measurement with the GPS receiver 3DM-GX5-45 from LORD

For a development project we needed the speed of an agricultural vehicle with a sampling frequency of at least 20 Hz. There are different possibilities for this; Radar sensors or encoders can be integrated into the vehicle with appropriate effort. We finally decided on a GPS receiver (or GNSS receiver) with an IMU (Inertial Measurement Unit: three-axis gyro and acceleration sensors) and an integrated Kalman filter. We came across the 3DM-GX5-45 from LORD, which includes all of these functions.

Read more …
Aucodys provides support in the area of railway applications

Aucodys provides support in the area of railway applications

Aucodys has many years of experience in the rolling stock sector. The company has gained a lot of know-how over the years especially in the area of tilting technology and bogie monitoring and supports various companies in this area.

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Application tool for synchronizing data signals

Application tool for synchronizing data signals

With the high-level language LabVIEW you can not only record data and control systems, but also visualize and edit data. This with a simple desktop application and no special hardware.

We were allowed to develop an application for a customer to synchronize data. With his measurement setup, it was not possible to record all measurement data using the same software. As a result, he ended up with two differently formatted files with measurement data.

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Offizieller Mathworks Partner
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