Rotational Speed Measurement

  • Ro|ta|tio|nal  speed (Sing.); Unit: s-1
    The rotational speed (or orbital frequency) is a value that indicates the rate of the rotations of - preferably meachnical – rotational motions. The rotational speed is for example an essential feature in the identification of the performance parameters of engines.

Solutions

The signals of tachogenerators can mostly be connected directly to a measuring system by BMC Messsystreme GmbH as an analog signal. When using an impulse rotational speed sensor, our BMC measuring systems with integrated counter function are most suitable, for example the digital-IO DAQ system USB-IO16 or the network measuring system LAN-AD16fx.

  • Solution 1
  • Solution 2

The best options for incremental encoders are our measurement systems with integrated counter function, like the digital I/O measurement system USB-OI16.

 
 
 
 
 
 

Measurement Software

NextView

Measurement Device

USB-OI16

  • 16 optocoupler inputs (3..32V)
  • 16 semiconductor switches with high-side
    drivers (5..32V)
  • 2 counters (32 bit) for pulse, incremental encoder,
    or pulse-time measurement
  • supply 7..32V (external) or 5V (internal)
  • USB 2.0, full-speed
  • DIN rail mounting

Complete Package

Now you've got an all-round carefree package for your measurement task. From your incremental encoder to the connecting cables right through to displaying live data of our signals. Best components, combined perfectly.
Special Price from 353,- €*

* Manufacturer's suggested retail price: Our offer is addressed to industrial and commercial customers plus VAT applicable in the different countries. Prices abroad can differ.

The best options for incremental encoders are our measurement systems with integrated counter function, like the network data acquisiton system LAN-AD16fx.

 
 
 
 
 
 

Measurement Software

NextView

Measurement Device

LAN-AD16fx

  • 16 analog inputs (16 bit, ±10V, ±5V, ±2V, ±1V)
  • total sampling rate 250kHz
  • 2 analog outputs (16 bit, ±10V)
  • 32 digital channels (2x16 bit, TTL/CMOS)
  • 3 counters (32 bit, max. 16 MHz) for pulse, incremental encoder, or pulse-time measurement
  • power supply via network (PoE) or externally with 12-40V
  • galvanically isolated to LAN, power supply
  • TCP/IP Ethernet (Twisted Pair)
  • synchronized to real-time

Complete Package

Now you've got an all-round carefree package for your measurement task. From your incremental encoder to the connecting cables right through to displaying live data of our signals. Best components, combined perfectly.
Special Price from 1048,- €*

* Manufacturer's suggested retail price: Our offer is addressed to industrial and commercial customers plus VAT applicable in the different countries. Prices abroad can differ.

In Detail

To give your application a complete measurement system you will need several components. Below we offer a perfect solution from our modular product range, preconfigurated and optimised in price and value.
Of course all components can be adjusted to your individual needs. Our team is more than happy to help any time via phone, mail or live-chat.

Signal Condition

The measurement of rotational speed quite often has to cover a wide range of rotational speeds. The requirements of slow rotating processes and fast rotating ones are very different, so that the measuring process has to be adjusted accordingly. The rotational speed change is usually not a very dynamic signal.

Sensors

There are two different measuring processes available for the acquisition of rotational speed. Depending on the rotational speed a tachogenerator produces voltage that the measuring system can collect. The disadvantage of this measuring process is for once the wearout of the sensor as well as the missing possiblity to acquire very slow rotating speeds. The second measuring process is - independent to the inbuilt rotating speed sensor - an impulse rotating speed sensor that measures the number of incoming impulses per time unit or between two impulses, meaning the reciprocal of the frequency. There are optical and inductive sensors available. The impulse acquisitions are digital not analog signals.

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