METHOD AND APPARATUS FOR TRANSFERRING SIGNAL DATA

• US 20090177295A1
• Filed: 12/18/2008
• Published: 07/09/2009
• Est. Priority Date: 12/18/2007
• Status: Active Grant

• Current Assignee: ABB Schweiz AG (ABB Limited)
• Original Assignee: Abb Oy (ABB Limited)
• Inventors: Niemi, Mika
• Granted Patent: US 8,253,354 B2
• Time in Patent Office: Days
• US Class Current: 700/42
• CPC Class Codes: G01S 5/0018 Transmission from mobile station to base station
• CPC Class Codes: G06F 17/17 Function evaluation by approximation methods, e.g. inter- or extrapolation, smoothing, least mean square method G06F17/18 takes precedence ; interpolation for numerical control G05B19/18

Abstract

The invention relates to a method and device for transferring signal data from a sender to one or more receivers. The invention includes receiving a quantity as a function of time, arranging the quantity into a first polynomial to obtain values for polynomial coefficients of a first continuous signal, and transferring the values of the polynomial coefficients of the first continuous signal via a first data transfer link to one or more receivers.

Claims

1. A method for transferring signal data to one or more receivers, comprising:

receiving a quantity as function of time,

arranging the quantity into a first polynomial to obtain values of polynomial coefficients of a first continuous-time signal, and

transferring the values of the polynomial coefficients of the first continuous-time signal via a first data transfer link to one or more receivers.

2. A method as claimed in claim 1, comprising:

receiving a target value of the quantity as a first function of time,

arranging the target value into the first polynomial to obtain the values of the polynomial coefficients of the first continuous-time signal,

receiving a measured actual value of the quantity as a second function of time,

arranging the actual value into a second polynomial to obtain value of polynomial coefficients of a second continuous-time signal,

transferring the values of the polynomial coefficients of the first continuous-time signal via a first data transfer link to one or more receivers, and

transferring the values of the polynomial coefficients of the second continuous-time signal via a second data transfer link to one or more receivers.

3. A method as claimed in claim 1, comprising:

transferring the values of the polynomial coefficients of the first continuous-time signal to a polynomial element of a receiver,

transferring the values of the polynomial coefficients of the second continuous-time signal to a polynomial element of a receiver,

receiving a synchronization mark from a first element,

storing the value of a time counter at the time of receipt,

receiving a synchronization mark from a second element,

storing the value of a time counter at the time of receipt, and

producing one or more control functions to a control element on the basis of the values of the coefficients of one or more continuous-time polynomials and/or one or more time counter values of the receiving end.

4. A method as claimed in claim 1, wherein the control function may be a sum, difference, multiplication, division, derivation, and/or integration of the polynomials or a combination thereof.

5. A method as claimed in any one of preceding claim 1, comprising:

obtaining from the control element a continuous-time control, and

converting the continuous-time control to a discrete-time control.

6. A method as claimed in claim 1, wherein the discrete-time control is torque control and that this controls a frequency converter that produces one or more signals for directing, adjusting, or controlling a motor.

7. A method as claimed in claim 1, wherein the first and second data transfer link is the same data transfer link.

8. A method as claimed in claim 1, wherein the first and/or second data transfer link comprises the exact temporal synchronization of the sending and receiving ends and the forwarding of numerical information.

9. A method as claimed in claim 1, comprising:

approximating a target signal and/or measured signal with a third- or fourth-degree polynomial.

10. A method as claimed in claim 1, comprising:

calculating the value of a polynomial in such a manner that a time variable obtains its value in relation to a given internal and/or external time stamp, signal, trigger, or a combination thereof.

14. A computer program, wherein it comprises program code means adapted to perform any of the steps according to claims 1, when the program is run in a processor.

11. A device for transferring signal data, wherein it is adapted

to receive a quantity as a function of time,

to arrange the quantity into a first polynomial to obtain values of polynomial coefficients of a first continuous-time signal, and

to transfer the values of the polynomial coefficients of the first continuous-time signal via a first data transfer link to one or more receivers.

12. A device as claimed in claim 11, wherein it is adapted

to receive a target value of the quantity as a first function of time,

to arrange the target value into a first polynomial to obtain the values of the polynomial coefficients of the first continuous-time signal,

to measure the actual value of the quantity as a second function of time,

to transfer the actual value to a second element to arrange the actual value into a second polynomial to obtain values of polynomial coefficients of the second continuous signal,

to transfer the values of the polynomial coefficients of the first continuous-time signal via the first data transfer link to one or more receivers, and

to transfer the values of the polynomial coefficients of the second continuous-time signal via the second data transfer link to one or more receivers.

13. A device for receiving signal data, wherein it is adapted

to receive values of polynomial coefficients of a first continuous-time signal from a device of claim 11 to a polynomial coefficient element,

to receive values of polynomial coefficients of a second continuous-time signal from the device of claim 11 to a polynomial coefficient element,

to receive a first synchronization mark from a first element,

to store a value of a time counter at the time of receipt,

to receive a second synchronization mark from a second element,

to store a value of a time counter at the time of receipt, and

to produce one or more control functions for a control element on the basis of one or more continuous-time polynomial coefficients and/or one or more time counter values of the receiving end.