Method and system for estimating payload weight with hydraulic fluid temperature compensation
US-9200432-B1 · Dec 1, 2015 · US
Method and system for estimating payload weight with tilt position compensation
US9464403B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9464403-B2 |
| Application number | US-201414299402-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 9, 2014 |
| Priority date | Jun 9, 2014 |
| Publication date | Oct 11, 2016 |
| Grant date | Oct 11, 2016 |
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- Title
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Abstract
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A system for estimating the weight of a payload in a bucket is provided. The system includes a pivotable lift linkage, a lift cylinder assembly, a pivotable tilt linkage and a tilt cylinder assembly. A payload measurement system receives pressure data relating to a pressure in the lift cylinder assembly and angular position data relating to an angular position of the bucket relative. The payload measurement system is configured to estimate weight of a payload in the bucket based on the pressure data, the angular position data and predetermined physical parameters relating to the tilt linkage and lift linkage that are useable to characterize an effect of a portion of the payload that is supported by the tilt cylinder assembly.
First claim
Opening claim text (preview).
I claim: 1. A method for estimating the weight of a payload in a machine, the machine including a chassis, a bucket, a lift linkage pivotally attached at a first end to the chassis and a second end to the bucket such that the bucket is pivotable relative to the lift linkage about a first axis, a lift cylinder assembly connected to the chassis and the lift linkage for pivoting the lift linkage relative to the chassis, a tilt linkage pivotally connected at a first end to the lift linkage and connected at a second end to the bucket, and a tilt cylinder assembly connected to the chassis and the tilt linkage for pivoting the bucket relative to the lift linkage about the first axis, the method comprising the steps of: monitoring pressure data relating to a pressure in the lift cylinder assembly; monitoring angular position data relating to an angular position of the bucket relative to the first axis; determining an initial estimate of the weight of a payload in the bucket based on the pressure data; determining a tilt compensation that characterizes an effect of a portion of the payload that is supported by the tilt cylinder assembly based on the angular position data and predetermined physical parameters relating to the tilt linkage and the lift linkage; and adjusting the initial estimate of the weight of the payload in the bucket using the tilt compensation, wherein an estimated bucket weight is used in determining the tilt compensation based on the following formulas: F L 1 n f = 2 F L 1 raise F L 1 lower F L 1 raise + F L 1 lower and W B = m 0 * ( F L 1 n f - F L 0 ) . 2. The method of claim 1 wherein a weight gain with the bucket in a fully racked position is used in determining the tilt compensation, wherein the weight gain is based on the following formula: m = W cal F L cal - F L empty . 3. The method of claim 1 wherein a tilt compensation gain factor for a particular angular position of the bucket from a table stored in the payload measurement system is used in determining the ti
Assignees
Inventors
Classifications
Testing or calibrating of weighing apparatus · CPC title
lift truck scale · CPC title
having fluid weight-sensitive devices · CPC title
of the Z-type · CPC title
Sensors and their calibration for indicating the position of the work tool · CPC title
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Frequently asked questions
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- What does patent US9464403B2 cover?
- A system for estimating the weight of a payload in a bucket is provided. The system includes a pivotable lift linkage, a lift cylinder assembly, a pivotable tilt linkage and a tilt cylinder assembly. A payload measurement system receives pressure data relating to a pressure in the lift cylinder assembly and angular position data relating to an angular position of the bucket relative. The payloa…
- Who is the assignee on this patent?
- Caterpillar Inc
- What technology area does this patent fall under?
- Primary CPC classification E02F3/422. Mapped technology areas include Fixed Constructions.
- When was this patent published?
- Publication date Tue Oct 11 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).