Measuring amplifier for signal processing in automation

Measuring amplifier play a major role in signal processing under increasing digitization and Automation - even more so if they are used in Industry 4.0 production. For example, today are application-related Sensors used without integrated evaluation electronics in the housing and the digital evaluation of the signals is transmitted to intelligent measuring amplifiers. Below you will find New developments around the measuring amplifier. 

Contents

• In-line strain gage measuring amplifier from GTM
• Measuring amplifier module for digital sensors from Burster
• FAQ
  
  

In-line strain gage measuring amplifier from GTM

01.07.2021 | With the Inline Amplifier (ILA), GTM Testing and Metrology has developed a new strain gauge measuring amplifier. The robust DMS sensor electronics work very dynamically and precisely. The in-line measuring amplifier is particularly suitable for decentralized, highly dynamic and automated test bench measurement data acquisition as well as demanding industrial automation Ethercat interface. The IP67 amplifier was developed for use close to strain gauge based transducers. This allows decentralized measurement data acquisition directly in the field. In the case of decentralized use, the necessary sensor measuring lines are significantly shortened.

This improves the metrological performance significantly. The system topology is thanks Power over Ethernet (PoE) function decentralized and exclusively via industrial RJ45 Cables built up. This has a positive effect on costs. via an integrated Switch a large number of ILA amplifiers can also be easily and conveniently connected using daisy chaining. With a higher number of channels, this significantly reduces the system costs.

Complete measuring chain from a single source

The installation of the strain gauge measuring amplifier can be carried out within a few minutes without any problems Plug and process Sensor side via standard M12 connector and system side via robust RJ45 connector. The entire measuring chain comes from a single source, from the force transducer to the necessary connecting cables to the EtherCAT interface.

For demanding Multi-channel applications the real distributed clocks feature (DC) with 1 µs is integrated. This is important for the synchronous processing of the measurement data acquisition. The strain gage measuring amplifiers are suitable for use in test benches for material and material testing, for component and structure tests as well as industrial quality and process control - regardless of whether new equipment or retrofitting of existing systems.

The smart decentralized measuring amplifier combines the worlds of the top-hat rail strain gauge measuring amplifiers and the classic data acquisition systems (DAQ). With a measuring rate of 40 kS / s, a bandwidth of 2 kHz and an accuracy class of 0,01, the ILA offers a high metrological performance. It is very adaptable in terms of the number of channels and does not require any additional ones Gateways for connection to the automation system.

Measuring amplifier module for digital sensors from Burster

18.01.2021/XNUMX/XNUMX | The design, the available installation space or the harsh environment of the automation applications often require sensors without evaluation electronics integrated in the housing. Here come smart ones Measuring amplifier come into play, which digitally evaluate the measured values ​​of the sensors. about one fieldbus controllers, they transfer this to the automation network and the applications already have it digital sensors. burster offers an intelligent modular system for this. 

The scalable, fully digital and compact module consists of one Fieldbus controller Type 9251 for industrial Ethernet standards such as Profinet, Ethernet / IP or Ethercat and flexible measuring amplifiers. Up to 8 type 9250 measuring amplifiers can be connected to a controller. The measuring amplifiers are suitable for sensors such as strain gauges (DMS), force sensors, potentiometers or analog ± 10 V or incremental signals.

Gateways for Industry 4.0 factory networks

The measuring amplifier automatically recognizes Burster sensors with the sensor recognition Burster Ted's. It can be parameterized quickly and easily on the module. Easily accessible terminals for the cabling the intelligent sensors and the DIN rail mounting allow quick installation in the switch cabinet. Fieldbus controller and amplifier modules are simply strung together.

Quick configuration on site

The fieldbus controller can read out up to 9 measuring channels. The eight channels of the 9250 measuring amplifier and an additional ±10 VDC channel as standard signals or transmitter input. There is one via buttons on the amplifier module Lightning configuration possible on site. In addition, the devices can be conveniently configured via a USB interface on the front or a backup using the Digivision PC software.

The modular system with measuring amplifiers and fieldbus controller is very good due to its compact design switch cabinet placeable. The digital recording of measured values ​​requires little space.

The measuring amplifier modules work with a 24 bit AD conversion. The measuring rate of the individual measuring amplifiers is up to 14.400 measurements per second. The linearity deviation of a measurement is <0,005% v. E. They offer a strain gauge supply voltage of 2,5, 5 or 10 V with a maximum supply current of 40 mA.

Ethernet APL | Current status, applications and implementation

So can several Strain gauges or strain gage sensors can be connected in parallel to the supply voltage. The 6-wire sensor connection uses line and contact resistances to compensate for any measurement errors caused by e.g. B. Temperature change. A parameterizable limit switch allows direct switching via an output on the MV module. This is e.g. B. required in case of a quick emergency stop. There are no runtime-related delays that occur when integrating the PLC.

FAQ

What is a measuring amplifier?

A measuring amplifier prepares incoming electrical quantities such as currents, voltages or frequencies or the smallest analog signals from z. B. strain gauges, force transducers or resistance measuring bridges so that a measuring device can detect them. It filters, linearizes, amplifies and normalizes the signal. The then processed output signals from sensors from various manufacturers can now be transported and processed as a uniform output signal.