Revolution counter
Dx-Speed

Wireless wheel speed acquisition directly on the wheel

messtec + sensor masters award

At the messtec + sensor masters 2019 trade show, the DxSpeed system took first place in the sensor category and won the coveted messtec + sensor masters award. It was recognized as an innovative system for wirelessly measuring wheel speed that does not require any additional mechanical connection.

messtec + sensor Award
Drehratenerfassung mit dem Dx-Speed-System

Wheel speed measurement without reference point

The DxSpeed system conveniently acquires the wheel speed directly on vehicle wheels. The system does not require a stator or additional reference point and delivers measurement results – both on the test bench and outdoors – even in harsh conditions such as mud, snow and dust. The accouracy ist typically better than 0.5%.

Impacts against the axle also will not affect the results. This means that even driving over sleepers is possible!

Aquaplaning Messung

Aquaplaning tests without angle encoder

At last there is a system for the precise measurement of aquaplaning without a stator rod – the DxSpeed. Compact in its mechanical design, it captures every change in the wheel speed and thus exactly the moment at which aquaplaning occurs. This makes the tests simple, and at the same time very accurate. Up to four wheels can be simultaneously measured in sync with multiple sensors, cable-free and on all wheel types!

Easy to work with

The mechanical construction of the DxSpeed system is simple – allowing for an easy installation and convenient transport, as no bulky stator rod has to be accommodated.

Dx-Empfangsantenne zur Befestigung am Seitenspiegel
Dx-antenna for mounting on side mirror

Short set-up times

CAEMAX offers optional Peiseler plates with corresponding collets for the DxSpeed sensors. As a result, the set-up times remain short – the system can be installed and ready to use in just a few minutes

Synchronous acquisition from four wheels or axles

With four Dx-Speed sensors, the telemetry receiver unit (DxRCI) synchronously acquires the measured values from all four wheels. The data appear in real time and can be collected and processed via CAN or analog.

Mechanische Leistungsmessung mit der Dx Empfangseinheit (RCI)
Dx-Receiver Unit (RCI)

Specifications

Dx-Speed
Maximum RPM
±7200 1/min
Accuracy
< 0.5 % at 0 °C to 50 °C
Signal frequency
16 Hz (others on request)
Temperature range
-10 °C to +65 °C
Weight
400 g
Dimensions
Diameter: 140 mm, height: 36 mm
Abmessung
Höhe: ca. 50 mm 
Durchmesser: ca. 100 mm
Dx-Telemetry Transmitter Unit (SCT)
Transmission frequency
Dx: 13 frequencies in the 868-MHz-Band

Dx-HT: 17 frequencies in the 2.4-GHz-Band
Aggregate sampling rate
Max. 4.6/5.0 kHz per channel (868-MHz-/2.4-GHz-Band)
Resolution
16 bit
Synchronized measurements
Up to 4 Dx-Speed sensors
Ingress protection rating
IP 68
Power voltage
Battery with 40 h operating time
Transmission power
Max. 10 dBm
Dx-Telemetry Receiver Unit (RCI)
Antenna inputs
2 independent receivers in diversity mode
Display
2.83 inch color display, 320 x 240 px
Auto-zero
Remote controllable
CAN interface
CAN 2.0b acc. to ISO 11898, max. 1 MBaud
Analog output
6 BNC sockets
Configuration
Up to 4 Dx-Speed
Power voltage
9–36 Volt DC
Temperature range
-20 °C to +65 °C
Dimensions
Approx. 170 x 130 x 53 mm (without antenna)
Weight
Approx. 0.8 kg

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