Ingenieurbüro Bauer builts software tools to automate electromagnetic compatibility (EMC) test with automotive electronic control units (ECU). Our software tools are the missing link between your automotive diagnosis interface (eg K line / K bus, CAN, VAN or LIN, i.e. automotive busses) and the EMC test system.
We also built software tools for automotive supply system testing.
Example for an EMC test
Applications for our products
Our software tools for a better EMC testing
Automotive supply system testing
EMC test labs
Standard EMC test software
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Especially when doing electromagnetic compatibility (EMC) tests with an automotive ECU or entire vehicles you cannot monitor the EUT without an online diagnosis. Up to now that monitoring is beeing done with diagnosis tools (K line, CAN, VAN, LIN, ISO 9141, KWP2000). But these tools are designed for development purposes, so they provide only very few features to make EMC testing easier. Instead of using this tools it is more efficient to use a direct coupling between the EUT and the EMC test system. But also if an automotive ECU is connected to an EMC test system you will soon find out the limits of standard EMC software. Common EMC software is designed to process analog measurings. For a committed EMC technician it is also an easiness to monitor a simple digital value. But it is not that easy to make the EUT really communicating with the EMC test system. This requires the use of an additional software.
Our products include software solutions for the Automation of EMC Testing, especially for automotive ECUs with a
diagnosis interface(K line, CAN, VAN, LIN, etc.), supply system testing for vehicles and generating of modulation waveshapes.
Most of our customers are automotive suppliers. In the automotive business in particular, an ECU can
only be monitored with a diagnosis tool. But most of these diagnosis tools donīt provide the
features that are needed for EMC testing.
Device drivers and DLL: Extensions for standard EMC software. Device drivers and DLLs to connect your ECU to an EMC test software.
Custom Software: Software to automate your EMC tests. EMC control unit, product-specific diagnosis tool and documentation combined in only one software!
Supply system testing: Software to generate waveshapes according to OEM requirements. These tools control arbitrary waveform generators and programmable DC amplifiers.
Supply-System Faults: Supply system testing as contemplated by the EMC means to recreate supply-system faults (as they are found in real vehicles) in an EMC laboratory.
Such faults result eg from starting the motor or the alternator ripple.
Test Systems: To generate supply-system faults in a lab there are special test systems available. But if there are exotic wave shapes to be tested or if there is a new requirement of a car manufacturer you will soon find out the limits of these systems.
New Wave Shapes: Do you own such a test system, but the wave shape you need is not implemented in your machine? Our tools are a good choice, if a standard solution is not enough!
Software For Supply System Testing: Our tools support all common supply system testers. The software functionality extends from a simple data-table generator to a complete test control - incl. EUT monitoring, documentation and automated testing!
Test Systems: Our tools support the common supply system testers. Spitzenberger + Spies, EM-Test, Schaffner, Agilent, Hameg, ...
Automotive: We supply the tools to test all the OEM reqirements. For all car manufacturers in Europe, USA and Asia. New pulse shapes and non-standardized pulses.
The little assistants: Programs and tools to generate non-standard wave shapes. Software to control an arbitrary generator, a programmable DC amp or a commercial supply system tester.
The picture shows an EMC test "Immunity against radiated RF fields", eg in accordance to ISO 11452-2. The purpose of this test is to determine the behaviour of electronic equipment in the presence of high intensity RF fields, eg near a handy or a RF transmitting plant. Our software has to do several jobs during this EMC test: First thing is to set (i.e. to control) the generating of the RF fields. To do so, all instruments are remote controlled via the GPIB. As a result, the EUT is exposed to a well-defined electromagnetic field. Next thing is to monitor the EUT. For this, we took the relevant parts of the original (DOS-based) diagnosis software, modified them and added them to our Windows application. The most important job is the documentation of the results. That means: logging of frequency, fieldstrength and the current state of the EUT. There are various test algorithms available. For example it is possible to do an automatic test, that takes up the the EMC characteristics for a single property of the EUT.
The standard modulation in EMC testing was the amplitude modulation in the past. But nowadays modern
communication equipment, like GSM or DECT phones often use pulse modulation techniques. Also radar systems
(such as distance warning or parking aids) are being used in vehicles in a growing extend. As a consequence
also pulse modulation should be applied when executing EMC tests. Our modulation software-tools shall
appreciate your arbitrary waveform generator to a powerfull modulation source. Just as well communication
test equipment could be used for EMC testing by using our software. When using an extension module for
your standard EMC software the pulse modulation could be set as easy as the amplitude modulation.
What is modulation? For wireless communication there is normally a RF carrier signal used. The actual information is coded by modulating the RF carrier signal with a LF signal, eg speech, data, and so on. Common modulation techniques are amplitude modulation or frequency modulation.
Modulation and EMC testing: An EMC test system can easily generate usual modulation waveshapes, such as amplitude modulation or frequency modulation. But you will find it hard to generate a particular pulse modulation (because of the limitations of the built-in modulation generator). So if you need to generate a complex modulation waveshape an external modulation generator is necessary.
How can i get a curve into a generator? At first our software caculates calculates a value table with the modulation curve. Then this table is programmed into your arbitrary waveform generator. There are solutions available for the requirements of the major car manufacturers, and also for military, aerospace and communication purposes.
Usually one shall use a standard software to control his EMC testing. In Europe the most popular EMC
software is RSUS (NeWeTec) and EMS-K1 (Rohde & Schwarz). RSUS and EMS-K1 are providing various features
for an highly-automated EMC testing: Software interfaces for EUT monitoring, customizable monitoring
channels (with extension modules), processing of EUT data (with extension modules), EMC algorithm to
work out a detailed threshold of EMC impact.
Extension modules for RSUS or EMS-K1 are device drivers and DLLs. Standard extension modules (eg for a power meter or a RF generator) are already provided with the application kits. If thereīs special measuring task (eg communication with an EUT) a customized extension module could be used. So an EMC test system and an EUT could be connected with simple means. Frank Hoppert, NeWeTec RSUS: Premium software tool to control all kinds of EMC testing
Rohde & Schwarz EMS-K1: The EMC software of the world´s most famous RF instrument supplier