Measurement device and method for telemetric transmission of measurement data from a measurement unit on a mobile system to a base station
A device for telemetric transmission of measurement data in a work space that includes a base station arranged in a stationary manner and a measurement unit attached fixedly to a system that moves within the work space. A sensor for receiving measurement signals can be attached to or integrated in the measurement unit. The measurement unit also includes an electronic unit having a first processor, a first telemetric unit, and a first antenna for sending measurement data and for receiving configuration and control data. The base station includes a data processing unit, a second antenna and a second telemetric unit for receiving the measurement data and for sending configuration and control data. One of the antennas is linearly polarized, and the other antenna is circularly polarized. A method is provided for the measurement unit to receive measurement signals.
1. A device for telemetric transmission of measurement data in a defined work space between a moving system and a stationary agent operating in the defined work space, the device comprising:
a measurement unit configured for generating measuring signals and fixedly attached to the moving system, the measurement unit including an electronic unit, a first processor, a sensor, and a measuring channel connected to the sensor;
a base station configured for receiving measuring signals from the measurement unit, wherein the base station remains within the defined work space;
the sensor is configured for acquiring measuring signals for telemetric transmission of measurement data to the base station;
wherein the first processor is configured for converting the measuring signals into measurement data;
wherein the electronic unit of the measurement unit having a first telemetry unit and a first antenna for transmitting measured data and for receiving configuration and control data;
wherein the base station includes a data processing unit, a second antenna and a second telemetry unit for receiving the measurement data and for transmitting the configuration and control data;
wherein one of the first antenna and the second antenna is a linearly polarized antenna and the other of the first antenna and the second antenna is a circularly polarized antenna; and
wherein each telemetry unit is configured so that when a relative disposition between the two antennas changes during movement of the moving system so as to halve the maximum signal strength, then the telemetry unit of the transmitting antenna doubles the power of the transmitting antenna so as to negate loss in signal strength created by the change in relative disposition between the two antennas.
2. The device according to claim 1 , wherein the measurement unit comprises at least one sensor, said sensor being a force, pressure, torque, feed force, bending moment, strain, vibration, acceleration and/or temperature sensor.
3. The device according to claim 1 , wherein at least one measuring channel is provided for processing measuring signals from at least one of the following sensors: piezoelectric sensors, piezoresistive sensors, strain gauges and thermocouples.
4. The device according to claim 1 , wherein the moving system is one of the following: a rotating tool, a turbine, a shaft, a roller, a wheel of a vehicle or a robot.
5. The device according to claim 1 , wherein the two telemetry units are transmitters and receivers of far field telemetry in the range between 400 MHz and 700 GHz, inclusive.
6. The device according to claim 1 , wherein each measuring channel of the measurement unit comprises an AD converter for digitizing the measuring signals.
7. The device according to claim 1 , wherein at least one measuring channel of the measurement unit comprises a range switch for adjusting the measuring range wherein each range switch can be configured from the base station by telemetry.
8. The device according to claim 1 , wherein at least one measuring channel of the measurement unit comprises a reset function for resetting the measuring channel and wherein all functions are controlled from the base station by telemetry.
9. The device according to claim 1 , wherein for powering the electronic unit and the first telemetry unit the measurement unit comprises a power generation system.
10. The device according to claim 9 , wherein the power generation unit generates power from the subjection of the measurement unit to one of: movement or a temperature difference.
11. The device according to claim 1 , wherein the data processing unit comprises a second processor for analyzing the measurement data and for telemetric evaluation, configuration, operation and control of the measurement unit.
12. The device according to claim 1 , wherein the data processing unit comprises at least one interface to a user, a controller, an evaluation unit and a memory unit.
13. The device according to claim 1 , wherein the measuring channel of the measurement unit includes a start/stop function for starting and stopping a measurement and wherein the base station is configured to control all functions of the measuring channel by telemetry.
14. The device according to claim 1 , wherein for powering the electronic unit and the first telemetry unit the measurement unit includes an energy storage unit.
15. The device according to claim 14 , wherein the energy storage unit of the measurement unit receives energy transmitted by means of telemetry.