Back to results
US 11,162,243 B2Granted
Energy buffer arrangement and method for remote controlled demolition robot
AssigneeHusqvarna AB
InventorTommy Olsson
Life of this patent
Estimating the term…
Abstract
A remote controlled demolition robot (10) comprising a controller (17) and at least one actuator (12) controlled through a hydraulic system (400) comprising at least one valve (13a) and a hydraulic gas accumulator (440), wherein the controller (17) is configured to determine a fluid flow in the hydraulic system (400), determine if the determined fluid flow in the hydraulic system is above a first threshold, and if so discharge the accumulator (440) to provide power to the actuator (12); and determine if the determined fluid flow in the hydraulic system is below a second threshold, and if so charge the accumulator (440) for buffering power in the hydraulic system (400).
Claims20
A remote controlled demolition robot comprising:
- a controller;
- a hydraulic system comprising at least one valve and a hydraulic gas accumulator;
- at least one actuator configured to be controlled by the hydraulic system;
- a system pressure sensor configured to measure a pressure in the hydraulic system;
- and
- an accumulator pressure sensor configured to measure a pressure in the accumulator;
- wherein the controller of the remote controlled demolition robot is configured to:
- determine whether the pressure in the accumulator from the accumulator pressure sensor is greater than the pressure in the hydraulic system from the system pressure sensor;
- cause the accumulator to, in response to a level of power required by the hydraulic system being higher than a level of power being provided by an electric power source and determining that the pressure in the accumulator is greater than the pressure in the hydraulic system, discharge to increase a flow of fluid to the hydraulic system to provide power to the at least one actuator;
- and
- cause the accumulator to, in response to the level of power required by the hydraulic system being lower than the level of power being provided by the electric power source, charge to buffer power from the hydraulic system.
8 more elements
A demolition robot comprising:
- a controller;
- and
- at least one actuator controlled through a hydraulic system comprising at least one valve and a hydraulic gas accumulator;
- wherein the controller is configured to:
- determine a required fluid flow at the at least one actuator in the hydraulic system;
- determine if the required fluid flow at the at least one actuator in the hydraulic system is above a first threshold, and if so discharge the accumulator to provide power to the at least one actuator;
- and
- determine if the required fluid flow in the hydraulic system is below a second threshold, and if so charge the accumulator for buffering power from the hydraulic system;
- wherein the first threshold has a different fluid flow value than the second threshold.
6 more elements
A method comprising:
- receiving a first measurement of a pressure in a hydraulic system from a system pressure sensor;
- receiving a second measurement of a pressure in a hydraulic gas accumulator from an accumulator pressure sensor;
- determining whether the pressure in the hydraulic gas accumulator from the hydraulic accumulator pressure sensor is greater than the pressure in the hydraulic system from the system pressure sensor;
- regulating a propagation of the pressure in the hydraulic gas accumulator via a membrane between a first compartment holding the fluid and a second compartment holding compressible gas to cause compression of the compressible gas to store power within the hydraulic gas accumulator;
- discharging the fluid from the first compartment of the hydraulic gas accumulator to increase a flow of the fluid to the hydraulic system of a demolition robot to provide the power to an actuator of the hydraulic system, based on whether the pressure in the accumulator is greater than the pressure in the hydraulic system and in response to a level of power required by the hydraulic system being higher than a level of power being provided by an electric power source;
- and
- charging the hydraulic gas accumulator to buffer the power from the hydraulic system, in response to the demolition robot being connected to the electric power source, the level of power being provided by the electric power source being higher than the level of power required by the hydraulic system.
4 more elements
A remote controlled demolition robot comprising:
- a controller;
- a hydraulic system comprising at least one valve, and a hydraulic gas accumulator;
- at least one actuator configured to be controlled by the hydraulic system;
- a system pressure sensor configured to measure a pressure in the hydraulic system;
- an accumulator pressure sensor configured to measure a pressure in the accumulator;
- and
- a battery;
- wherein the controller of the remote controlled demolition robot is configured to:
- determine whether the pressure in the accumulator from the accumulator pressure sensor is greater than the pressure in the hydraulic system from the system pressure sensor;
- cause the accumulator to, in response to a level of power required by the hydraulic system being higher than a level of power being provided by an electric power source and determining that the pressure in the accumulator is greater than the pressure in the hydraulic system, discharge to increase the flow of fluid to the hydraulic system to provide power to the at least one actuator;
- and
- cause the accumulator to, in response to the level of power required by the hydraulic system being lower than the level of power being provided by the electric power source, charge to buffer power from the hydraulic system;
- wherein the remote controlled demolition robot is arranged to operate solely or partially on battery power from the battery.
10 more elements
Dependencies are inferred from the claim text.