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1. (WO1988003260) DEBITMETRE A TOURBILLONS
Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

The embodiment of the invention in which an exclusive property or priviledge is claimed are defined as follows:
1. An apparatus for measuring fluid flow comprising in combination: a) a body including a flow passage extending from one extremity to the other extremity of the body;
b) a vortex generator of an elongated cylindrical shape disposed across a first cross section of the flow passage; and
c) a vortex detector comprising a planar member disposed across a second cross section of the flow passage on a plane generally parallel to the central axis of the flow passage in a
generally parallel arrangement with respect to the vortex
generator wherein one extremity of the planar member is
secured to the wall of the flow passage, a lever member
including a fulcrum means disposed generally parallel to the central axls of the flow passage with one extremity connected to the other extremity of the planar member opposite to
said one extremity secured to the wall of the flow passage,
and a transducer means including a force receiving member
connected to the lever member;
wherein said transducer means provides signals related to the frequencies of vortex shedding from the vortex generator as a measure of fluid flow through the flow passage.
2. The combination as set forth in Claim 1 wherein said transducer means provides signals related to the amplitudes of alternating lift forces on the planar member as a measure of mass flow rate of fluid moving through the flow passage.
3. The combination as set forth in Claim 2 wherein the ratio of the amplitude to the frequency of the alternating lift forces on the planar member is used as a measure of the mass flow rate and density of fluid moving through the flow passage.
4. The combination as set forth in Claim 1 wherein the force receiving member is connected to the lever member by a free-flexing joint.
5. The combination as set forth in Claim 1 wherein the force receiving member is connected to the lever member by an elastically flexible joint.
6. The combination as set forth In Claim 1 wherein the transducer means includes at least one Piezo electric element under a pressurized contact with a thin flange from which the force receiving member extends.
7. The combination as set forth in Claim 2 wherein said combination includes an electromagnet intermittently exerting a lateral force of known magnitude on the combination of the planar member and the lever member, from which the ratio of the amplitude of signals From the transducer means to the magnitude of the forces on the planar member is determined for calibration purpose.
8. An apparatus for measurini; fluid flow comprising in
combination :
a) a body including a flow passage extending from one extremity to the other extremity of the body;
b) a vortex generator of an elongated cylindrical shape disposed across a first cross section of the flow passage; and
c) a vortex detector comprising a planar member disposed across a second cross section of the flow passage generally parallel to the vortex generator on a plane generally parallel to the central axis of the flow passage wherein one extremity of
the planar member is secured to the wall of the flow passage, and a transducer means including a force receiving member
connected to the other extremityof the planar member opposite to said one extremity;
wherein said transducer means provides signals related to the frequencies of vortex shedding from the vortex generator as a measure of fluid flow through the flow passage.
9. The combination as set forth in Claim 8 wherein said transducer means provides signals related to the amplitudes of alternating lift forces on the planar member as a measure of mass flow rate of fluid moving through the flow passage.
10. The combination as set forth in Claim 9 wherein the ratio of the amplitude to the frequency of the alternating lift forces on the planar member is used as a measure of the mass flow rate and density of fluid moving through the flow passage.
11. The combination as set forth in Claim 3 wherein the force receiving member is connected to the other extremity of the planar member by a free-flexing joint.
12. The combination as set forth in Claim 8 wherein the force receiving member is connected to the other extremity of the planar member by an elastically flexible joint.
13. The combination as set forth in Claim 8 wherein the transducer means includes at least one Piezo electric element under a pressurized contact with a thin flange from which the force receiving member extends. 14. The combination as set forth in Claim 9 wherein said combination includes an electromagnet intermittently exerting a lateral force of known magnitude on the planar member, from which the ratio of the amplitude of the signals from the transducer means to the magnitude of the forces on planar member is determined for calibration purpose.
15. The combination as set forth in Claim 8 wherein the force receiving member is connected to the planar member by an extension member disposed generally parallel to the central axis of the flow passage wherein one extremity of the extension member is connected to the other extremity of the planar member opposite to said one extremity and the other extremity of the extension member is connected to the force receiving member.
16. The combination as set forth in Claim 15 wherein said transducer means provides signals related to the amplitudes of alternating lift forces on the planar member as a measure of mass flow rate of fluid moving through the flow passage.
17. The combination as set forth in Claim 16 wherein the ratio of the amplitude to the frequency of the alternating lift forces on the planar member is used as a measure of the mass flow rate and density of fluid moving through the flow passage.
18. The combination as set forth in Claim 15 wherein the force receiving member is connected to the extension member by a free-flexing joint.
19. The combination as set forth in Claim 15 wherein the force receiving member is connected to the extension member by an elastically flexible joint.
20. The combination as set forth in Claim 15 wherein the transducer means includes at least one Piezo electric element under a pressurized contact with a thin flange from which the force receiving
member extends.
21. The combination as set forth in Claim 16 wherein said
combination includes an electromagnet intermittently exerting a lateral force of known magnitude on the combination of the planar member and the extension member, from which the ratio of the amplitude of the signals from the transducer means to the magnitude of the forces on the planar member is determined for calibration purpose.
22. An apparatus for measuring fluid flow comprising in combination :
a) a body including a flow passage extending from one extremity to the other extremity of the body;
b) a vortex generator of an elongated cylindrical shape
disposed across a first cross section of the flow passage;
and
c) a vortex detector comprising a planar member disposed
across a second cross section of the flow passage generally parallel to the vortex generator on a plane generally
parallel to the central axis of the flow passage wherein
one extremity of the planar member is secured to the wall
of the flow passage, a lever member including a fulcrum
means disposed generally parallel to the central axis of
the flow passage with one extremity connected to the other . extremity of the planar member opposite to said one
extremity, and a motion detector means for detecting movemeats of the other extremity of the lever member;
wherein said motion detector means provides signals related to the frequencies of vortex shedding from the vortex generator as a measure of fluid flow through the flow passage.
23. The combination as set forth in Claim 22 wherein said motion detector means provides signals related to the amplitudes of alternating lift forces on the planar member as a measure of mass flow rate of fluid moving through the flow passage.
24. The combination as set forth in Claim 23 wherein the ratio of the amplitude to the frequency of the alternating lift forces on the planar member generated by vortices shed from the vortex generator is used as a measure of the mass flow rate and density of fluid moving through the flow passage.
25. The combination as set forth in Claim 23 wherein said combination includes an electromagnet for intermittently exerting a lateral force of known magnitude on the combination of the planar member and the lever member, from which the ratio of the amplitude of signals from the motion detector means to the magnitude of the forces on the planar member is determined for calibration purpose.