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Speed measurement with Rotec optical sensors

ROTEC laser sensors capture black and white zebra patterns on rotating components and convert the reflected signal into TTL pulse sequences for the RASdelta measurement card using the ElLas3 laser tachometer. We use the RASdelta card's 12.3 GHz counter to store extremely accurate time stamps and use the modular RAS software for torsional vibration, angle of rotation, transmission error and slip analyses.

Thanks to angle-based recording, sensor vibrations can be recognised and corrected immediately.

Image laser sensor

Laser sensor

The laser sensors are used for optical measurement of the rotational frequency or speed of rotating machine parts. A line pattern is scanned using the reflection method. Reticle discs and strips are available in various dimensions.

Image Signal conditioning The Laser Tachometer 3 (ElLas3)

Signal processing

The Laser Tachometer 3 (ElLas3) converts the signal from the ROTEC laser sensor into a pulse sequence with TTL level, which can then be processed by the RASdelta speed measurement card. The automatic teach-in function and coloured LEDs make operation easier.

Image RASdelta speed measurement card

RASdelta speed measurement card

The RASdelta speed measurement card forms the basis for the torsional vibration analysis. A 12.3 GHz counter is used to set high-precision time stamps for evaluation in the RAS software.

Figure RAS Software Analyses torsional vibrations and torsional angle, transmission error (TE) as well as slip and torsion.

RAS Software

The modular RAS software enables efficient measurement and evaluation. Typical evaluation options include analysing torsional vibrations and torsional angles, transmission errors (TE) as well as slip and torsion.

 

 

 

 

 

Speed measurement with Rotec magnetic sensor

Rotec differential sensors measure the speed on ferromagnetic gears and are available in various designs, lengths and high-temperature versions. The differential sensor adapter converts the sinusoidal signal into TTL pulses for the RASdelta measuring card. The 12.3 GHz counter card registers each pulse with high precision and the modular RAS software analyses torsional vibrations, angle of rotation, transmission error and slip - allowing you to detect imbalances and wear at an early stage and prevent gear damage.

Image Differential sensors for speed detection on ferromagnetic gears

Differential sensor

Differential sensors are used to measure the speed of ferromagnetic gears. Different designs and sensor lengths as well as high-temperature variants allow speed measurements to be realised efficiently.

Image The Differential Sensor Adapter (DSA)

Signal processing

The Differential Sensor Adapter (DSA) converts the sinusoidal signal of the ROTEC magnetic sensor into a pulse sequence of needle pulses with TTL level, which is processed by the RASdelta speed measurement card.

Figure RASdelta speed measurement card for torsional vibration analysis

RASdelta speed measurement card

The RASdelta speed measurement card forms the basis for the torsional vibration analysis. A 12.3 GHz counter is used to store high-precision time stamps for the rising edges of the digital signal.

Image Ras Software

RAS Software

The modular RAS software enables efficient measurement and evaluation. Typical evaluation options include analysing torsional vibrations and torsional angles, transmission errors (TE) as well as slip and torsion.

 

 

 

 

 

 

Valve lift measurement

The valve lift measurement provides detailed information about the opening and closing behaviour of valves. This allows engine processes to be precisely analysed and efficiency to be increased in a targeted manner.

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GMR sensor

The Sensitec GLM711 AVB sensor for valve lift measurement is designed for use on ferromagnetic tooth structures. The sensor supplies two 90 degree phase-shifted sinusoidal analogue signals.

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Signal processing

The sine and cosine signals from the sensor are either converted online into a 0-10V stroke signal in the valve train measuring module (ELVTMM, formerly Sensitec SPP3001) or sent to the 3.2 MHz analogue inputs of the RASdelta as a SIN/COS track for further processing using the GMR sensor electronics.

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RASdelta analogue measuring card

The RASdelta 3.2 MHz analogue measuring card enables the acquisition of the SIN/COS signals of the valve lift sensor with a correspondingly high sampling rate in order to enable the analysis of valve touchdown speed, bounce and other in-depth, highly dynamic valve train analyses.

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RAS software

The valve lift measurement provides detailed information about the opening and closing behaviour of valves. This allows engine processes to be precisely analysed and efficiency to be increased in a targeted manner.

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#FAQs

Frequently Asked Questions

Have Question? We are here to help

What does the ROTEC solution for rotation analysis look like and what does RAS mean?

The ROTEC Rotational Analysis System (RAS) has been used for more than 30 years by users in the mechanical engineering, automotive, power generation and motorsport industries to comprehensively analyse rotating components.

With its unique measurement method using a 12.3 GHz counter card and a strictly angle-based approach to rotational speed detection and analysis, the RAS system offers users an unrivalled advantage.

ROTEC offers not only optical and magnetic speed sensors including signal conditioning adapters, but also the modular measuring system RASdelta as well as specialised and user-friendly software for measurement and analysis. This enables a complete solution from a single source. The ROTEC measurement technology products are perfectly harmonised and deliver meaningful results within a very short time after the uncomplicated setup of the measurement chain.

Thanks to the angle-based approach to speed measurement, problems such as sensor vibrations can be recognised after the first measurement and rectified immediately. This effectively prevents costly incorrect measurements.

Our team of experts at ROTEC ENGINEERING, consisting of long-standing users, will be happy to assist you with challenging tasks.

Are there options for customising the measurement systems and software?

The ROTEC RASdelta front end is a versatile modular measurement system that can be customised with 8 or 16 measurement cards to meet your specific measurement requirements.

Our RAS software offers you a comprehensive modular system for analysing rotating components and complex systems. It is an effective tool for mechanical engineers and requires no programming knowledge to perform measurements or analyses.

If you have specific metrological questions, our experienced ROTEC ENGINEERING consulting team will be happy to support you.

Does ROTEC offer other services in addition to the measuring systems, e.g. customised consulting or project support?

ROTEC not only offers speed sensors, signal conditioning, measurement systems (DAQ) and measurement and evaluation software, but also engineering and consulting services.

Our services include the design of measuring points in CAD, the mechanical processing of components, the application and calibration of sensors, the execution of measurement tasks and the evaluation of measurements in accordance with our customers' requirements, including the presentation of the results. The ROTEC ENGINEERING team can also realise sub-projects as part of project support.

Is there training or technical support for commissioning and integrating the measuring systems?

In addition to our annual ROTEC Training Week, which is held in both German and English, we also offer customised training courses for users. These training courses are specially tailored to your individual application of the ROTEC measuring system and include not only the theoretical basics and a detailed presentation of the software, but also practical demo measurements in your environment. This ensures that future users are optimally prepared for your specific application.

Furthermore, we are happy to support you in the commissioning of new measuring systems to enable you to familiarise yourself with the settings and possibilities of the RAS software as quickly as possible.

How is support ensured and are there self-help options?

In addition to our sales and support team in Munich, which serves the Central European market directly from here, ROTEC also cooperates with local partners in many global markets. These partners support local users with trained personnel for all matters relating to ROTEC measurement technology, first-level support and sales enquiries.

Our customers around the world appreciate the proximity of our sales and support teams, as this enables us to guarantee effective support even for short-term questions.

In addition to personal contact, ROTEC also offers an extensive knowledge database for self-help. Please register for our knowledge database to obtain detailed information on measuring and analysing torsional vibrations, transmission errors and valve systems, among other things.