System and method for monitoring crane and crane having same

Patent metadata

Field	Value
Publication number	US-11713222-B2
Application number	US-202017124471-A
Country	US
Kind code	B2
Filing date	Dec 16, 2020
Priority date	Dec 16, 2019
Publication date	Aug 1, 2023
Grant date	Aug 1, 2023

Abstract

A crane includes a carrier unit having a chassis, tires connected to the chassis, a carrier deck and outriggers. A superstructure is mounted on the carrier unit, the superstructure includes a telescoping boom. A slope sensor is operably connected to the carrier unit and configured to detect a pitch and/or a roll of the carrier unit during a lift operation. The crane further includes a system for monitoring a load lifted by the telescoping boom. The system is configured to determine the current load lifted by the telescoping boom, receive pitch and/or roll information of the carrier unit from the slope sensor, adjust coordinates of the crane in a coordinate system based on the pitch and/or roll information, determine a transformed operating radius using the adjusted coordinates; and compare the load lifted to a rated capacity at the transformed operating radius.

First claim

The invention claimed is:

1. A crane comprising:
a carrier unit having a chassis, tires connected to the chassis, a carrier deck and outriggers, the outriggers movable to a deployed condition in which the outriggers engage an underlying support surface and lift the tires from the support surface such that the outriggers support the carrier unit, and a retracted condition in which the outriggers are disengaged from the support surface and the tires are engaged with the support surface, such that the tires support the carrier unit;
a superstructure mounted on the carrier unit, the superstructure comprising a telescoping boom;
a slope sensor operably connected to the carrier unit and configured to detect a pitch and/or a roll of the carrier unit during a lift operation; and
a system for monitoring a load lifted by the telescoping boom, the system configured to:
determine the current load lifted by the telescoping boom;
receive pitch and/or roll information of the carrier unit from the slope sensor, the pitch and/or roll information including the detected pitch and/or roll of the carrier unit;
adjust coordinates of the crane in a coordinate system based on the pitch and/or roll information;
determine a transformed operating radius using the adjusted coordinates; and
compare the current load lifted to a rated capacity at the transformed operating radius,
wherein the system is configured to monitor the current load lifted with the outriggers in the retracted condition.

2. The crane of claim 1 , wherein the system is configured to control one or more movements of the telescoping boom based on the comparison of the current load lifted to the rated capacity at the transformed operating radius.

3. The crane of claim 1 , wherein the system is configured to receive boom length information from a boom length sensor and lift angle information from a lift angle sensor.

4. The crane of claim 1 , wherein the system stores one or more load charts and the rated capacity at the transformed operating radius is determined from a load chart of the one or more load charts.

5. The crane of claim 1 , wherein the system is further configured to determine a lean angle of the carrier unit using the pitch and/or roll information and further uses the lean angle to adjust the coordinates of the crane in the coordinate system.

6. A system for monitoring a load lifted by a crane, the crane comprising a carrier unit, a slope sensor mounted on the carrier unit configured to detect a pitch and a roll of the carrier unit, and a superstructure mounted on the carrier unit, the superstructure comprising a telescoping boom, the system comprising:
a processor and a non-transitory computer-readable storage medium configured to store program instructions and the processor is configured is interpret and execute the program instructions to:
determine a load lifted by the telescoping boom;
receive slope information of the carrier unit from the slope sensor, the slope information including the detected pitch and roll of the carrier unit;
determine a lean angle of the carrier unit using the slope information;
transform coordinates of the crane in a coordinate system using the lean angle to account for the pitch and roll of the carrier unit;
determine a transformed operating radius using the transformed coordinates; and
compare the load lifted to a rated capacity at the transformed operating radius.

7. The system of claim 6 , further configured to control movements of the telescoping boom based on the comparison of the load lifted to the rated capacity at the transformed operating radius.

8. A method for monitoring a load lifted by a crane, the crane comprising a carrier unit having a chassis, tires connected to the chassis, a carrier deck and outriggers, the outriggers movable between retracted and deployed conditions, a superstructure mounted on the carrier unit, the superstructure comprising a telescoping boom, and a slope sensor operably connected to the carrier unit and configured to detect a pitch and/or a roll of the carrier unit during a lift operation, the method comprising:
determining a load lifted by the telescoping boom;
receiving pitch and/or roll information of the carrier unit during a lift operation with the outriggers in the retracted condition such that the carrier unit is supported on the tires, wherein the pitch and/or roll information includes the detected pitch and/or roll of the carrier unit;
adjusting coordinates of the crane in a coordinate system based on the pitch and/or roll information;
determining a transformed operating radius using the adjusted coordinates; and
comparing the load lifted to a rated capacity at the transformed operating radius.

9. A crane comprising:
a carrier unit;
a plurality of tires connected to the carrier unit;
a plurality of outriggers connected to the carrier unit, the outriggers movable between a retracted condition in which the carrier unit is supported on ground by the plurality of tires and a deployed condition which the carrier unit is supported on ground by the outriggers;
a superstructure mounted on the carrier unit, the superstructure comprising a telescoping boom;
a slope sensor operably connected to the carrier unit configured to detect a slope of the carrier unit; and
a system for monitoring the crane, the system configured to:
receive slope information from the slope sensor, the slope information including the detected slope of the carrier unit;
determine an operating radius of the telescoping boom using the slope information with the outriggers in the retracted condition; and
control vertical extension of the outriggers based on the slope information during movement of the outriggers to the deployed condition for leveling the carrier unit.

10. The crane of claim 9 , wherein the determined operating radius takes into account the pitch and the roll of the carrier unit due to deformation of the tires during a lift operation.

Assignees

• Manitowoc Crane Companies Llc

Inventors

• Schoonmaker Stephen J
• Benton John F
• Stake Michael

Classifications

• B66C23/905 Primary

  electrical · CPC title

• B66C13/16

  Applications of indicating, registering, or weighing devices (in crane hooks B66C1/40; in safety gear B66C15/00; weighing-apparatus G01G; remote indicating in general G08) · CPC title

• B66C13/48

  Automatic control of crane drives for producing a single or repeated working cycle; Program control · CPC title

• B66C23/42

  with jibs of adjustable configuration, e.g. foldable · CPC title

• B66C23/88

  Safety gear (for cranes in general B66C15/00; for rope, cable, or chain winding mechanisms B66D1/54) · CPC title