Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for calibrating a measure sensor

A sensor, angle sensor technology, applied in the direction of converting sensor output, measuring devices, equipment with stored calibration coefficients, etc., can solve problems such as performance degradation and sensor accuracy degradation

Inactive Publication Date: 2013-03-13
CONTINENTAL AUTOMOTIVE FRANCE
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this calibration over a limited range results in reduced accuracy of the sensor outside of this limited range
In other words, according to known calibration methods, an increase in the performance of the sensor over a limited measuring range degrades the performance of the sensor over the entire possible range of variation of the physical quantity to be measured

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for calibrating a measure sensor
  • Method for calibrating a measure sensor
  • Method for calibrating a measure sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] The invention will be better understood and other features and advantages will become apparent by reading the ensuing description of the following example showing how the method according to the invention can be implemented for the detection of magnetostatic type angle sensors such as KMA 200 sold by NXP The sensor is calibrated.

[0019] The sensor includes, inter alia:

[0020] - a first transducer for converting the angle φ to be measured into a first electrical signal VS1 according to the following formula:

[0021] VS1=cos(2φ)+OB1;

[0022] - a second transducer for converting the angle φ to be measured into a second electrical signal VS2 according to the following formula:

[0023] VS2=sin(2φ)+OB2.

[0024] The coefficients OB1, OB2 correspond to the offsets produced by the transducers and the estimated values ​​of the coefficients OB1 and OB2 need to be subtracted from VS1 and VS2.

[0025] To this end, the sensor also includes computing means for determini...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

Method of calibrating an angular sensor includes a transducer for converting a real value of a physical quantity (φ), lying within an overall range of variations, into an electrical signal (VS1) according to a first predefined function f1(VS1=cos 2φ+OB1) having a factor (OB1) liable to drift according to an external condition, the method including a first step of measuring known values of the physical quantity within the overall range of variations and with at least two values of an external condition, a step of determining a set of correcting parameters, a second step of measuring a known additional value of the physical quantity chosen in a restricted range of variations, and a step of adjusting the set of correcting parameters from the second measurement step.

Description

technical field [0001] The invention relates to a method for calibrating a sensor measuring a physical quantity over a range of variation, said method comprising: [0002] - a first measuring step for determining a first set of measured values ​​associated with a first set of known values ​​of the distribution of said physical quantity over the entire range of variation and for at least two values ​​of the external condition; [0003] - a step of determining a set of correction parameters from the first set of measurements, said set of correction parameters allowing taking into account the drift of the sensor according to external conditions. Background technique [0004] This calibration method is well known for all types of sensors on the market. This calibration method allows to correct any drift of the sensor which is sensitive to external measurement conditions (eg temperature, air pressure, moisture content, etc.). [0005] Thus, for example, to calibrate an angle se...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01D3/02G01D3/036G01D5/14G01D18/00
CPCG01D18/008G01D3/022G01D5/145G01D3/0365
Inventor M·博纳托L·布龙
Owner CONTINENTAL AUTOMOTIVE FRANCE