P7.2 - Wireless Thermocouple – Consequently from Input to Output
- SENSOR+TEST Conferences 2011
2011-06-07 - 2011-06-09
- Proceedings SENSOR 2011
- P7 - Electronics
- M. Binhack - senTec Elektronik GmbH, Ilmenau (Germany)
- 838 - 842
Wireless thermocouple for temperature measurement is well known since many years. But all available systems only mean a wireless transmission system with the ability to use thermocouples as input device. For output normally common digital and analogue interfaces like RS232, RS485, USB, CAN, ect. as well as 0…10V, 4..20mA ect. are used. Up to now there exist no wireless solutions with thermo voltage output.
In different industrial and automotive applications many systems do not allow to replace the input interface. There is the strong demand of using thermo voltage as the only input signal. Especially for rotating or moving parts it is a great advantage to use wireless transmissions. Therefore a wireless system with the same behavior like a normal thermocouple has to be developed to fulfill the demand.
This paper shows the advantage of a real wire-less thermocouple with a generated thermo voltage as output signal. Especially the problems concerning the generation of a high precision voltage in the range of several μV will be discussed. Also the dynamical handling of the temperature behavior of different locations of the system parts including the different cold-junction compensations on both sides will be indicated. Finally the measurements and results of the test system under harsh environmental conditions in automotive tests will be presented.