Dynamic payload monitor
First Claim
1. A method for dynamically measuring and indicating payload weight for a vehicle having at least one implement linkage and at least one cylinder for modifying said implement linkage geometry, said method comprising the steps of:
- sensing the hydraulic pressure of said cylinder and responsively producing a first signal;
sensing said implement linkage geometry and responsively producing a second signal;
receiving said first and second signals and responsively deriving a preliminary payload weight in response to said first and second signals;
deriving a slope value; and
calculating a final payload weight in response to said preliminary payload weight and said slope value.
1 Assignment
0 Petitions
Accused Products
Abstract
A dynamic payload monitor measures and displays payload weight for a loader vehicle operated on a slope by sensing the hydraulic pressure and position of the lift arm cylinders. The payload weight is computed by curve fitting the sensed cylinder pressure and position data to a second order polynomial, and then performing interpolation or extrapolation with a pair of pressure versus position reference parabolas obtained during calibration. Payload weight is corrected for errors caused by operating the loader vehicle on a slope. The weight computation algorithms used in the dynamic payload monitor are applicable to a number of work vehicles having at least one work implement linkage and at least one hydraulic cylinder for modifying the linkage geometry.
53 Citations
11 Claims
-
1. A method for dynamically measuring and indicating payload weight for a vehicle having at least one implement linkage and at least one cylinder for modifying said implement linkage geometry, said method comprising the steps of:
-
sensing the hydraulic pressure of said cylinder and responsively producing a first signal; sensing said implement linkage geometry and responsively producing a second signal; receiving said first and second signals and responsively deriving a preliminary payload weight in response to said first and second signals; deriving a slope value; and calculating a final payload weight in response to said preliminary payload weight and said slope value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. An apparatus for dynamically measuring and indicating payload weight for a vehicle having at least one implement linkage and at least one cylinder for modifying said implement linkage geometry, said apparatus comprising:
-
means for sensing the hydraulic pressure of said cylinder and responsively producing a first signal; means for sensing said implement linkage geometry and responsively producing a second signal; means for receiving said first and second signals and responsively deriving a preliminary payload weight in response to said first and second signals; means for producing a slope value; and means for calculating a final payload weight in response to said preliminary payload weight and said slope value. - View Dependent Claims (10, 11)
-
Specification