Patents by Inventor Rickard Karlsson

Rickard Karlsson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11505015
    Abstract: A system for determining a tire pressure status in a vehicle is provided. The system includes at least one processing device, which may be arranged to: estimate values of a set of predetermined vehicle parameters; calculate a tire pressure parameter as a predetermined function of the values of the set of predetermined vehicle parameters, wherein said predetermined function has been generated by training a machine learning system, such as, for example, a neural network or a Support Vector Machine, using values of a large number of sets of predetermined vehicle parameters and associated tire pressure parameters; and determine a tire pressure status, indicating whether or not there is tire under-inflation, by comparing said tire pressure parameter with a threshold.
    Type: Grant
    Filed: December 20, 2018
    Date of Patent: November 22, 2022
    Assignee: Nira Dynamics AB
    Inventor: Rickard Karlsson
  • Patent number: 11505014
    Abstract: A system for determining a tire change status in a vehicle is provided. The system includes at least one processing device and a storage device. The at least one processing device may be arranged to: calculate a value of at least one reference parameter which may be used in indirect tire pressure monitoring; store the calculated value of said at least one reference parameter in the storage device; retrieve a previously stored value of said at least one reference parameter from the storage device; determine a similarity parameter based on a similarity between the calculated value and the previously stored value of said at least one reference parameter; and determine a tire change status, indicating whether or not the tires have been re-filled or replaced, by comparing said similarity parameter with a threshold.
    Type: Grant
    Filed: October 9, 2018
    Date of Patent: November 22, 2022
    Assignee: Nira Dynamics AB
    Inventors: Rickard Karlsson, Peter Lindskog, Andreas Hall, Daniel Murdin, Robert Johansson, Martin Lilja
  • Patent number: 10969401
    Abstract: The present disclosure relates to the estimation of a velocity of a first object using accelerometer signals, indicating an acceleration of the first object and/or a second object coupled to a first object. To this end, a characteristic frequency in the accelerometer signal spectrum may be determined, preferably by applying a parametric model or by performing a spectrum analysis, and used as a basis to estimate the velocity of the first object based on the determined characteristic frequency. The characteristic frequency may be determined by identifying the frequency having the maximum spectral amplitude or by identifying the fundamental frequency or a particular harmonic in the spectrum.
    Type: Grant
    Filed: August 10, 2015
    Date of Patent: April 6, 2021
    Assignee: NIRA DYNAMICS AB
    Inventors: Rickard Karlsson, Fredrik Gustafsson
  • Publication number: 20200307327
    Abstract: A system for determining a tire pressure status in a vehicle is provided. The system includes at least one processing device, which may be arranged to: estimate values of a set of predetermined vehicle parameters; calculate a tire pressure parameter as a predetermined function of the values of the set of predetermined vehicle parameters, wherein said predetermined function has been generated by training a machine learning system, such as, for example, a neural network or a Support Vector Machine, using values of a large number of sets of predetermined vehicle parameters and associated tire pressure parameters; and determine a tire pressure status, indicating whether or not there is tire under-inflation, by comparing said tire pressure parameter with a threshold.
    Type: Application
    Filed: December 20, 2018
    Publication date: October 1, 2020
    Applicant: Nira Dynamics AB
    Inventor: Rickard KARLSSON
  • Publication number: 20200238770
    Abstract: A system for determining a tire change status in a vehicle is provided. The system includes at least one processing device and a storage device. The at least one processing device may be arranged to: calculate a value of at least one reference parameter which may be used in indirect tire pressure monitoring; store the calculated value of said at least one reference parameter in the storage device; retrieve a previously stored value of said at least one reference parameter from the storage device; determine a similarity parameter based on a similarity between the calculated value and the previously stored value of said at least one reference parameter; and determine a tire change status, indicating whether or not the tires have been re-filled or replaced, by comparing said similarity parameter with a threshold.
    Type: Application
    Filed: October 9, 2018
    Publication date: July 30, 2020
    Applicant: Nira Dynamics AB
    Inventors: Rickard KARLSSON, Peter LINDSKOG, Andreas HALL, Daniel MURDIN, Robert JOHANSSON, Martin LILJA
  • Publication number: 20180231577
    Abstract: The present disclosure relates to the estimation of a velocity of a first object using accelerometer signals, indicating an acceleration of the first object and/or a second object coupled to a first object. To this end, a characteristic frequency in the accelerometer signal spectrum may be determined, preferably by applying a parametric model or by performing a spectrum analysis, and used as a basis to estimate the velocity of the first object based on the determined characteristic frequency. The characteristic frequency may be determined by identifying the frequency having the maximum spectral amplitude or by identifying the fundamental frequency or a particular harmonic in the spectrum.
    Type: Application
    Filed: August 10, 2015
    Publication date: August 16, 2018
    Inventors: Rickard KARLSSON, Fredrik GUSTAFSSON
  • Publication number: 20160202147
    Abstract: A system and a method of determining a tire class mounted on a wheel of a driving vehicle based on at least one sensor signal received from a sensors comprised in the vehicle.
    Type: Application
    Filed: June 9, 2015
    Publication date: July 14, 2016
    Inventors: Thomas SVANTESSON, Rickard KARLSSON, Anders SVENSSON, Martin LINDFORS
  • Patent number: 8630767
    Abstract: A method, an apparatus and a computer program product for estimating the current load of a vehicle wherein a filter bank including a filter for different weight classes, each filter implementing a vehicle model for estimating the current mass of the vehicle. Based on vehicle data indicative of a current driving situation of the vehicle, and filter parameter specific for the respective weight class, each filter provides a load estimation value as filter specific estimation of the current load of the vehicle.
    Type: Grant
    Filed: December 3, 2007
    Date of Patent: January 14, 2014
    Assignee: Nira Dynamics AB
    Inventors: Rickard Karlsson, Andreas Andersson, Jonas Josefsson
  • Publication number: 20110066322
    Abstract: A method, an apparatus and a computer program product for estimating the current load of a vehicle wherein a filter bank including a filter for different weight classes, each filter implementing a vehicle model for estimating the current mass of the vehicle. Based on vehicle data indicative of a current driving situation of the vehicle, and filter parameter specific for the respective weight class, each filter provides a load estimation value as filter specific estimation of the current load of the vehicle.
    Type: Application
    Filed: December 3, 2007
    Publication date: March 17, 2011
    Inventors: Rickard Karlsson, Andreas Andersson, Jonas Josefsson