Synchronous Recording of Stationary and Rotating Measurement Signals with only one Measuring Device

Manner Sensortelemetrie GmbH: Today, the modern high-precision sensor telemetry systems use digital transmission technology. The data are already digitised in the rotor and transferred flawlessly. The traditional reconversion of the measurement signals into analogue values on the stationary side is not exactly beneficial to accuracy. Why not transfer the digital data directly into the computer and omit separate data acquisition hardware and the analogue telemetry output cards? But how then can the digital data of rotating and stationary measuring points be synchronously merged? In the era of analog technology this was not a problem. The reconverted analogue telemetry output signals were merged with other stationary signals via a central data acquisition system. But at what cost, loss of accuracy and volume ?

MANNER Sensortelemetrie has now developed a very compact evaluation unit for the synchronous acquisition of up to 64 rotating and up to 12 stationary measurement signals. Via a coaxial cable, the rotating signals are recorded by means of proven sensor telemetry and transmitted to the evaluation unit. In addition, stationary sensors are directly connected and linked in the evaluation unit with the other signals with chronological synchronism. The data are contained and reinforced with a signal bandwidth of 1 to 50 kHz per channel from different sensors such as strain gauges, pressure sensors, temperature sensors, piezoelectric sensors, and rotary encoders. The digitisation with 16 bit occurs in close proximity to the sensor in MANNER’s robust and multiplicatively proven sensor signal amplifiers. The data are transferred directly to the computer for further processing via a digital output with the TCP/IP, CAN and USB 2.0 interfaces. This creates an extremely compact mini data acquisition system particularly for mobile applications. As usual, the amplification and the auto zero function with the known RMC function can be conveniently performed from a computer for all measuring channels. The robust technology allows the use of ambient temperatures from -40°C to +165°C for the sensor signal amplifiers and -45°C to +85°C with synchronous high vibration levels.