Method for systematically treating errors

• US 9,436,656 B2
• Filed: 03/16/2011
• Issued: 09/06/2016
• Est. Priority Date: 03/31/2010
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Boehl, Eberhard, Becker, Bernd, Pawlok, Bernard
• Primary Examiner(s): Satanovsky, Alexander
• Assistant Examiner(s): Kuan, John
• Application Number:
  US13/637,753
• Publication Number:
  US 20130080104A1
• Time in Patent Office: 2,001 Days
• US Class Current: 1/1
• CPC Class Codes: G01D 18/001 Calibrating encoders
• CPC Class Codes: G01D 5/24471 Error correction
• CPC Class Codes: G01D 5/2449 using hard-stored calibration data
• CPC Class Codes: G01D 5/2457 Incremental encoders having reference marks
• CPC Class Codes: G06F 17/00 Digital computing or data processing equipment or methods, specially adapted for specific functions information retrieval, database structures or file system structures therefor G06F16/00

Abstract

A method for systematically handling errors, and an assemblage for carrying out the method, are presented. The method serves for systematically handing errors for a goniometer in the context of the transfer of position data with a position transducer, the position transducer possessing markings that are sensed with at least one sensor; a profile being deposited in a memory region in connection with said markings; the position transducer generating as a function of its position, by way of the markings, position signals that carry, as data, parameters that are deposited into a further memory region beginning with an address pointer value of 0; said address pointer being incremented with each position signal; and a synchronization between the position signals and the profile being created, and the values stored in the profile being used to modify the number of pulses outputted to the goniometer.

Claims

1. A method for systematically handling errors for a goniometer in the context of the transfer of position data with a position transducer, the position transducer possessing markings that are sensed with at least one sensor, the method comprising:

storing a profile in a first memory region in connection with the markings, the first memory region being addressed by a first address pointer that is incremented with each position signal;

generating, by the position transducer, on the basis of the markings, position signals that carry, as data, parameters that are stored into at least one further memory region beginning with an address pointer value of a second address pointer, the second address pointer being incremented with each position signal, a synchronization between the parameters in the further memory region and the profile in the first memory region being created based on the two address pointers; and

modifying a number of pulses output to the goniometer using the values stored in the profile.

2. The method as recited in claim 1, wherein the synchronization is achieved by the fact that an address pointer is correspondingly set by the profile.

3. The method as recited in claim 1, wherein an encoder wheel that possesses teeth disposed in tooth spacings is used as a position transducer, a profile of the tooth spacings being stored.

4. The method as recited in claim 3, wherein at least one memory word is reserved in the profile for each tooth spacing, in which word is provided a field that contains a number of nominal spacing values that is associated with the tooth spacing, and a further field in which a deviation of the tooth spacing from an ideal spacing is entered.

5. The method as recited in claim 1, further comprising:

generating, by the position transducer, pulses that are equipped with a time stamp by a time base;

calculating difference times from a difference in the time stamps; and

calculating, as parameters, time stamps for received pulses, and time spans between each two pulses.

6. The method as recited in claim 1, wherein the second address pointer is incremented when a relevant position signal is present.

7. The method as recited in claim 1, wherein the second address pointer is synchronized with a central computing unit.

8. The method as recited in claim 1, wherein multiple sensors are used, data of which are evaluated separately.

9. The method as recited in claim 8, wherein the data of the sensors are combined with one another.

10. An assemblage for systematically handling errors for a goniometer in the context of the transfer of position data with a position transducer, the position transducer possessing markings that are sensed with at least one sensor, comprising:

a first memory region to receive a profile in connection with markings of the position transducer, the first memory region being configured to be addressed by a first address pointer that is incremented with each position signal; and

at least one further memory region to receive parameters that are generated on the basis of the position signals generated by the markings, wherein the parameters are stored into the at least one further memory region beginning with an address pointer value of a second address pointer, the second address pointer being incremented with each position signal, and a synchronization between the parameters in the further memory region and the profile in the first memory region being created based on the two address pointers;

wherein a number of pulses output to the goniometer is modified using the values stored in the profile.