Fuel flowmeter
First Claim
1. Fuel flowmeter apparatus comprising a first flowmeter, partially cylindrical housings, rotating impellers having meshed lobes rotatable in the partially cylindrical housings joined in a case having an inlet at one side and an outlet at an opposite side, fuel moving in the inlet and filling voids between the lobes in the impellers and moving cylindrically around opposite partially cylindrical walls and turning the impellers until reaching the outlet, the inlet and the outlet having flow conditioners for smoothing flow, reducing turbulence and promoting lamellar flow into and out of the case, a magnetic marker on at least one of the impellers, a transmitter mounted on the case, the transmitter having a Hall effect sensor for sensing passage of the marker as a pulse, a first signal conditioning software connected to the Hall effect sensor for adjusting transmitted information according to measured pulse rate and a standard flow, the transmitter having a temperature sensor, and a second signal conditioning software connected to the temperature sensor for adjusting transmitted flow rate signals according to a difference between sensed temperature and standard temperature.
2 Assignments
0 Petitions
Accused Products
Abstract
A fuel flowmeter has a flowmeter with rotating impellers with meshed lobes rotatable in partially cylindrical housings joined in a case having an inlet at one side and an outlet at an opposite side. Fuel moves in the inlet filling voids between lobes in both impellers and moves cylindrically around opposite partially cylindrical walls and turning the impellers until reaching the outlet. Flow conditioners in the inlet and outlet allows smooth flow, reducing turbulence and promoting lamellar flow into and out of the case. One of the rotors may have a magnetic marker. A transmitter with a Hall effect sensor is mounted on the case. A signal conditioning software is connected to the Hall effect sensor for adjusted transmitted information according to measured pulse rate and a standard flow. The transmitter has a temperature sensor, and a second signal conditioning software connected to the temperature sensor for adjusting transmitted flow rate signals according to a difference between sensed temperature and standard temperature. A signal cable is provided, and a junction box is connected to the signal cable. A flow computer is connected to the junction box for indicating fuel consumption. A remote control device is connected between the case and the transmitter. A fuel tank has a fuel supply line connected to the tank and a fuel pump is connected to the supply line. The flow computer calculates differences in flow between flows in the first and second flowmeters.
-
Citations
29 Claims
- 1. Fuel flowmeter apparatus comprising a first flowmeter, partially cylindrical housings, rotating impellers having meshed lobes rotatable in the partially cylindrical housings joined in a case having an inlet at one side and an outlet at an opposite side, fuel moving in the inlet and filling voids between the lobes in the impellers and moving cylindrically around opposite partially cylindrical walls and turning the impellers until reaching the outlet, the inlet and the outlet having flow conditioners for smoothing flow, reducing turbulence and promoting lamellar flow into and out of the case, a magnetic marker on at least one of the impellers, a transmitter mounted on the case, the transmitter having a Hall effect sensor for sensing passage of the marker as a pulse, a first signal conditioning software connected to the Hall effect sensor for adjusting transmitted information according to measured pulse rate and a standard flow, the transmitter having a temperature sensor, and a second signal conditioning software connected to the temperature sensor for adjusting transmitted flow rate signals according to a difference between sensed temperature and standard temperature.
- 12. A method for determining fluid flow rate, comprising providing a first flowmeter with rotating impellers having meshed lobes rotatable in partially cylindrical housings joined in a case having an inlet at one side and an outlet at an opposite side, moving the fuel in the inlet and filling voids between the lobes in the impellers and moving the fuel cylindrically around opposite partially cylindrical walls and turning the impellers until reaching the outlet, providing flow conditioners in the inlet and the outlet for smoothing flow, reducing turbulence and promoting lamellar flow into and out of the case, providing a magnetic marker on at least one of the impellers, mounting a transmitter on the case, providing a Hall effect sensor in the transmitter for sensing passage of the marker as a pulse, providing a first signal conditioning software connected to the Hall effect sensor, adjusting transmitted information according to measured pulse rate and a standard flow, providing a temperature sensor in the transmitter, and connecting a second signal conditioning software to the temperature sensor for adjusting transmitted flow rate signals according to a difference between sensed temperature and standard temperature.
- 23. A fuel flow measuring system comprising a computer having a display, a junction box having plural serial connectors, a computer cable connected to the computer and to a first serial connector of the junction box, a power supply connected to the junction box, plural transmitter cables connected to the junction box serial connectors, a flowmeter, a transmitter connected to the flowmeter, a microprocessor in the transmitter having a serial output, the serial output connected to a first transmitter cable, a temperature sensor connected to the transmitter, a pulse sensor connected to the transmitter, signal conditioners interconnecting the temperature and pulse sensors with the microprocessor, the power supply supplying power to the transmitter via the transmitter cable, the temperature sensor providing conditioned flowmeter temperature signals to the microprocessor, the pulse sensor providing conditioned rotor angular speed pulse signals to the microprocessor, the microprocessor supplying temperature and rotor speed pulse signals through the transmitter cables, junction box and computer cable to the computer, and the computer computing real time, average and total fuel usage and displaying fuel usage, as required.
Specification