Monitoring system for a movable component connected to a stationary component
A monitoring system for a mobile component, such as a rotating component, that is supported by a fixed component is described. The monitoring system includes two acoustic sensors positioned in the rotating component, two first amplifiers positioned in the rotating component, a single contactless communication unit including a first transceiver positioned in the rotating component and a second transceiver which faces the first transceiver and is positioned in the stationary component, two first connection lines that each connect a sensor to a first amplifier, and a multiplexer including two inputs connected to the two first amplifiers and a single output connected to the first transceiver.
1 . A monitoring system for a movable component connected to a stationary component, the monitoring system comprising:
a first acoustic sensor placed in the movable component;
a second acoustic sensor placed in the movable component;
a first amplifier placed in the movable component;
a second amplifier placed in the movable component;
a first connection line connecting the first acoustic sensor to the first amplifier;
a third connection line connecting the second acoustic sensor to the second amplifier;
a single contactless communication unit comprising a first transceiver placed in the movable component and a second transceiver facing the first transceiver and placed in the stationary component; and
a multiplexer comprising a first electrical input terminal connected to the first amplifier, a second electrical input terminal connected to the second amplifier, and a single electrical output terminal connected to the first transceiver, wherein the multiplexer is configured to alternatively send input signals received from the first amplifier and the second amplifier to the first transceiver.
2 . The monitoring system of claim 1 , wherein the multiplexer is configured to alternatively send input signals received from the first amplifier and the second amplifier to the first transceiver at a predetermined switching frequency.
3 . The monitoring system of claim 1 , further comprising a third amplifier placed in the movable component and connected in series to the multiplexer along a second connection line.
4 . The monitoring system of claim 1 , further comprising a fourth amplifier placed in the stationary component, the fourth amplifier comprising two electrical input terminals connected to the second transceiver and two electrical output terminals configured to be connected to an interface unit that is configured to distribute electrical power and transmit signals to and from a processor coupled to the monitoring system.
5 . The monitoring system of claim 1 , further comprising an analog-to-digital converter placed in the movable component or the stationary component, the analog-to-digital converter configured to receive an analog signal from the multiplexer and to convert the analog signal to a digital signal.
6 . The monitoring system of claim 5 , further comprising another processor placed in the movable component or in the stationary component, the another processor being configured to receive the digital signal from the analog-to-digital converter, to process the digital signal, and to output the processed digital signal.
7 . The monitoring system of claim 1 , further comprising a power supply circuit comprising:
a first power supply placed in the movable component and configured to provide electrical power to the first amplifier;
a second power supply placed in the movable component and configured to provide electrical power to the second amplifier; and
an air-coupled transformer comprising (i) a first coil placed in the movable component, the first coil configured to provide electrical power to the first power supply and the second power supply, and (ii) a second coil placed in the stationary component, the second coil configured to receive electrical power.
8 . The monitoring system of claim 7 , further comprising a third power supply placed in the stationary component, the third power supply configured to provide electrical power to the second coil and to a fourth amplifier placed in the stationary component or to the second transceiver.
9 . The monitoring system of claim 7 , further comprising:
a fourth power supply coupled directly to the first coil; and
a coupler configured to receive electrical power from the fourth power supply and to provide electrical power into a second connection line downstream of the multiplexer, the electrical power being in a frequency band differing from a frequency band of an analog signal generated by the first and second acoustic sensors;
a first decoupler configured to receive electrical power from the second connection line upstream of the multiplexer and to provide electrical power to the first amplifier; and
a second decoupler configured to receive electrical power from the second connection line upstream of the multiplexer and to provide electrical power to the second amplifier.
10 . The monitoring system of claim 9 , further comprising a balancing head.
11 . The monitoring system of claim 10 , wherein the fourth power supply is connected to the balancing head and configured to provide electrical power to the balancing head.
12 . The monitoring system of claim 1 , wherein:
a first input signal received at the first electrical input terminal from the first amplifier is a first input analog signal, and
a second input signal received at the second electrical input terminal from the second amplifier is a second input analog signal.
13 . The monitoring system of claim 1 , wherein:
the first acoustic sensor is placed at a first location in the movable component, and
the second acoustic sensor placed at a second location that is different from the first location in the movable component.
14 . A monitoring system for a movable component connected to a stationary component, the monitoring system comprising:
a first acoustic sensor placed in the movable component;
a second acoustic sensor placed in the movable component;
a first amplifier placed in the movable component;
a second amplifier placed in the movable component;
a first connection line connecting the first acoustic sensor to the first amplifier;
a third connection line connecting the second acoustic sensor to the second amplifier;
a first power supply placed in the movable component and configured to provide electrical power to the first amplifier;
a second power supply placed in the movable component and configured to provide electrical power to the second amplifier;
an air-coupled transformer comprising (i) a first coil placed in the movable component, the first coil configured to provide electrical power to the first power supply and the second power supply, and (ii) a second coil placed in the stationary component, the second coil configured to receive electrical power;
a third power supply coupled directly to the first coil;
a single contactless communication unit comprising a first transceiver placed in the movable component and a second transceiver facing the first transceiver and placed in the stationary component;
a second connection line connecting the first amplifier and the second amplifier to the first transceiver;
a multiplexer comprising a first electrical input terminal connected to the first amplifier, a second electrical input terminal connected to the second amplifier, and a single electrical output terminal connected to the first transceiver;
a coupler configured to receive electrical power from the third power supply and to provide electrical power into the second connection line downstream of the multiplexer, the electrical power being in a frequency band differing from a frequency band of an analog signal generated by the first and second acoustic sensors;
a first decoupler configured to receive electrical power from the second connection line upstream of the multiplexer and to provide electrical power to the first amplifier; and
a second decoupler configured to receive electrical power from the second connection line upstream of the multiplexer and to provide electrical power to the second amplifier.
15 . The monitoring system of claim 14 , wherein the multiplexer is configured to alternatively send input signals received from the first amplifier and the second amplifier to the first transceiver at a predetermined switching frequency.
16 . The monitoring system of claim 14 , further comprising an analog-to-digital converter placed in the movable component or the stationary component, the analog-to-digital converter configured to receive an analog signal from the multiplexer and to convert the analog signal to a digital signal.
17 . The monitoring system of claim 14 , further comprising a balancing head connected to the third power supply.
18 . A monitoring system for a movable component connected to a stationary component, the monitoring system comprising:
a first acoustic sensor placed in the movable component;
a second acoustic sensor placed in the movable component;
a first amplifier placed in the movable component;
a second amplifier placed in the movable component;
a first connection line connecting the first acoustic sensor to the first amplifier;
a third connection line connecting the second acoustic sensor to the second amplifier;
a balancing head;
a first power supply placed in the movable component and configured to provide electrical power to the first amplifier;
a second power supply placed in the movable component and configured to provide electrical power to the second amplifier;
a third power supply is connected to the balancing head and configured to provide electrical power to the balancing head;
a single contactless communication unit comprising a first transceiver placed in the movable component and a second transceiver facing the first transceiver and placed in the stationary component; and
a multiplexer comprising a first electrical input terminal connected to the first amplifier, a second electrical input terminal connected to the second amplifier, and a single electrical output terminal connected to the first transceiver.
19 . The monitoring system of claim 18 , wherein the multiplexer is configured to alternatively send input signals received from the first amplifier and the second amplifier to the first transceiver at a predetermined switching frequency.
20 . The monitoring system of claim 18 , further comprising an analog-to-digital converter placed in the movable component or the stationary component, the analog-to-digital converter configured to receive an analog signal from the multiplexer and to convert the analog signal to a digital signal.