Sensor system for a cutting machine tool

1. Sensor system for a cutting machine tool, comprising:

a. an energy-supply unit, which provides inductively energy for the supply of at least one sensor arrangement of a cutting machine tool out of a magnetic alternating field;

b. at least one sensor arrangement, which measures a force, appearing within a cutting machine tool and a torque and the body sound within a cutting machine tool; and

c. a data transmitting unit which wirelessly transmits data via radio waves, wherein said data are related to a value, which is measured by the at least one sensor arrangement of the cutting machine tool.

2. Sensor system according to claim 1 , wherein the magnetic alternating field and the wireless data transmission use different frequencies.

3. Sensor system according to claim 2 , wherein the frequency of the magnetic alternating field has a value of ≦125 kHz and wherein the frequency of the wireless data transmission has a value of ≧125 kHz.

4. Sensor system according to claim 3 , wherein the frequency of the wireless data transmission is within the MHz range, particularly in the range of ≧10 MHz.

5. Sensor system according to claim 1 , further comprising a data receiving unit, to allow a bidirectional data transmission from and to the sensor system.

6. Sensor system according to claim 1 , further comprising a receiving unit to receive the data sent from the data transmitting unit.

7. Sensor system according to claim 6 , wherein the receiving unit comprises an interface for the control of the cutting machine tool.

8. Sensor system according to claim 6 , wherein the receiving unit can set measuring parameters of the sensor arrangement.

9. Sensor system according to claim 1 , further comprising a processor, which controls the function of the energy supply unit and the sensor arrangement and the data transmitting unit.

10. Sensor system according to claim 9 , further comprising a memory with instructions for the processor.

11. Sensor system according to claim 5 , further comprising a processor, which controls the function of the energy supply unit and the sensor arrangement and the data transmitting unit, and a memory with instructions for the processor, wherein the instructions for the processor can be updated via the data receiving unit.

12. Sensor system according to claim 1 , wherein the sensor arrangement comprises one or more of the following sensors:

a. at least one strain gauge for measuring of a torque and a force;

b. an acceleration sensor;

c. a sensor for body sound and airborne sound, particularly on the basis of a piezo-electric element;

d. a temperature sensor particularly on the basis of a semiconductor and on the basis of a measuring of the electric resistance.

13. Sensor system according to claim 12 , wherein the at least one strain gauge is connected to a capacitor, to form a low pass for a pulsed input signal.

14. Sensor system according to claim 12 , wherein a plurality of strain gauges are connected with each other to a Wheatstone circuit.

15. Sensor system according to claim 12 , wherein the electric signals generated from a sensor are digitalized and transmitted to the data transmitting unit via a wired digital bus.

16. Sensor system according to claim 1 , further comprising a generating unit for the magnetic alternating field, wherein the generating unit preferably comprises a pair of coils.

17. Sensor system according to claim 12 , comprising a plurality of sensor arrangements, which are arranged at different areas of the cutting machine tools.

18. Sensor system according to claim 17 , further comprising a plurality of data transmitting units, wherein the plurality of sensor arrangements and the plurality of data transmitting units are provided with energy by means of a common first magnetic alternating field.

19. Cutting machine tool with a sensor system according to one of previous claims 1 to 18 .