Transformer board
A transformer board is disclosed. In some embodiments, the transformer board includes a base, a circuit board, a transformer having a first and second winding, a first and a second connector, a ribbon cable and a nonconductive fill material. The base has a recess within which the circuit board is positioned. The transformer is mechanically coupled to the circuit board. The first connector is configured to electrically couple to transducers within a pressure boundary of an ultrasonic flow meter and is electrically coupled to the second winding of the transformer. The ribbon cable is electrically coupled between the first winding of the transformer and the second connector. The nonconductive fill material is contained by the recess and encases the circuit board, the transformer, the coupling of the first connector to the second winding of the transformer, and the coupling of the ribbon cable to the first winding of the transformer.
1. An ultrasonic meter comprising:
a spool piece defining a fluid flow pathway within a pressure boundary;
a first and second transducers operatively coupled to the spool piece and within the pressure boundary, the first and second transducers in operational relationship to each other;
an electronics enclosure coupled to the spool piece, the electronics enclosure outside of the pressure boundary;
a signal acquisition circuit board positioned within the electronics enclosure;
a transformer board positioned within the electronics enclosure proximate to the signal acquisition circuit board, the transformer board comprising:
a base comprising a recess;
a circuit board within the recess;
a first and second transformers mechanically coupled to the circuit board, each transformer comprising a first winding and a second winding;
said second winding of the first transformer electrically coupled to the first transducer, and the second winding of the second transformer electrically coupled to the second transducer;
said first winding of the first transformer electrically coupled to the signal acquisition board, and the first winding of the second transformer electrically coupled to the signal acquisition board;
said first and second transformers provide, at least in part, impedance matching between the transducers and the signal acquisition board; and
a nonconductive fill material contained by the recess and encasing the circuit board and transformers.
2. The ultrasonic meter of claim 1 , wherein the base is at least one selected from the group consisting of: rectangular; rectangular with at least one mitered corner; and trapezoidal.
3. The ultrasonic meter of claim 1 , wherein the nonconductive fill material comprises epoxy.
4. The ultrasonic meter of claim 1 , wherein the transformer board is mechanically coupled to the electronics enclosure.
5. The ultrasonic meter of claim 1 , further comprising a first connector electrically coupled between at least one of the first and second transducers and the second windings of the first and second transformers.
6. The ultrasonic meter of claim 5 , further comprising a second connector electrically coupled between at least one of the first and second transducers and the second windings of the first and second transformers and to the first connector.
7. The ultrasonic meter of claim 1 , further comprising a ribbon cable electrically coupled between the first windings of the first and second transformers and the signal acquisition board.
8. The ultrasonic meter of claim 7 , further comprising a connector electrically coupled between the ribbon cable and the signal acquisition board.
9. An ultrasonic meter comprising:
a spool piece defining a fluid flow pathway within a pressure boundary;
a first transducer and a second transducer operatively coupled to the spool piece and within the pressure boundary;
a signal acquisition circuit board outside of the pressure boundary;
a transformer board outside of the pressure boundary, the transformer board comprising:
a circuit board;
a first transformer and a second transformer mechanically coupled to the circuit board, each transformer comprising a first winding and a second winding;
said second winding of the first transformer electrically coupled to the first transducer, and the second winding of the second transformer electrically coupled to the second transducer;
said first winding of the first transformer electrically coupled to the signal acquisition board, and the first winding of the second transformer electrically coupled to the signal acquisition board;
said first and second transformers providing, at least in part, impedance matching between the transducers and the signal acquisition board.
10. The ultrasonic flow meter of claim 9 , further comprising an electronics enclosure coupled to the spool piece, the electronics enclosure outside of the pressure boundary.
11. The ultrasonic flow meter of claim 10 , wherein the transformer board and the signal acquisition circuit board are disposed within the electronics enclosure.
12. The ultrasonic meter of claim 9 , further comprising a first connector electrically coupled between at least one of the first and second transducers and the second winding of at least one of the first and second transformers.
13. The ultrasonic meter of claim 12 , further comprising a second connector electrically coupled between at least one of the first and second transducers and the second winding of at least one of the first and second transformers and electrically coupled to the first connector.
14. The ultrasonic meter of claim 9 , further comprising a ribbon cable electrically coupled between the first windings of the first and second transformers and the signal acquisition board.
15. The ultrasonic meter of claim 14 , further comprising a connector electrically coupled between the ribbon cable and the signal acquisition board.
16. The ultrasonic meter of claim 9 , further comprising a base having a recess wherein the circuit board is disposed in the recess, and a nonconductive fill material, wherein the nonconductive fill material is contained by the recess and encases the circuit board and transformers.