Method of displaying high-resolution distributions of physical parameters on a monitor and device for carrying out the method

• US 4,987,602 A
• Filed: 04/28/1989
• Issued: 01/22/1991
• Est. Priority Date: 05/31/1988
• Status: Expired due to Fees

• Current Assignee: Brunner, Wolfgang, Ludwig V. Zech
• Original Assignee: Brunner, Wolfgang, Ludwig V. Zech
• Inventors: Brunner, Wolfgang, Zech, Ludwig V.
• Primary Examiner(s): Boudreau, Leo H.
• Assistant Examiner(s): DINH, TAN X
• Application Number:
  US07/345,040
• Time in Patent Office: 634 Days
• Field of Search: 382/54, 382/22, 382/1, 358/13, 358/109, 340/799, 340/734, 364/518, 364/521, 364/522
• US Class Current: 382/100
• CPC Class Codes: G01D 7/10 giving indication in co-ordinate form

Abstract

A method of displaying a high-resolution distribution of the amount of physical parameters measured on a prescribed surface by a number of sensors with an electric output signal, especially pressures or forces acting at right angles on a stage that has a matrix of sensors, on a display.

Claims

1. A method for displaying a high-resolution distribution of physical parameters in form of pressures or forces acting at right angles on a stage having a matrix of sensors, comprising the steps:

measuring said parameters with said sensors having an electrical output signal, said parameters being displayed on a display monitor;

converting said output signal to digital values when said output signal is an analog signal;

storing digital values of each sensor in a respective address in a results memory;

generating from the digital values stored in the results memory a first virtual image in form of a matrix of squares with sides of a first predetermined length and representing locations of said sensors, each stored digital value being associated with pixel values from a pixel memory;

generating from the pixel values a second virtual image in form of a matrix of squares with sides of a second predetermined length differing from said first predetermined length, one virtual image being superimposed on the other virtual image;

calculating each pixel value by a processor from a square area surrounding centrally said pixel value in said second virtual image by determining each area in said first virtual image;

weighting each area with stored digital value in said first virtual image by forming products with areas of surrounding squares and summing all products;

summing all areas of said surrounding squares;

dividing the sum of all products by the sum of all areas of said surrounding squares and forming a quotient;

storing the quotient in a corresponding address in said pixel memory; and

displaying contents of said pixel memory on said display monitor.

2. A method as defined in claim 1, wherein said sensors are arranged in an array of mutually perpendicular rows and columns, adjacent sensors being all equally spaced from each other.

3. A method as defined in claim 1, wherein said digital values are entered serially in said results memory.

4. A method as defined in claim 1, wherein said results memory has addresses equal in number to said sensors.

5. A method as defined in claim 4, wherein said addresses in said results memory are in form of a matrix of rows and columns, each sensor in said stage having a digital value associated with each address.

6. A method as defined in claim 1, wherein said square area surrounding centrally said pixel value in said second virtual image is equal to four times said second predetermined length.

7. A method as defined in claim 1, wherein said pixel memory has addresses arrayed in a matrix of rows and columns, pixel values in one row or column being calculated sequentially and then row by row or column by column.

8. A method as defined in claim 1, wherein each pixel value is stored in said pixel memory in form of a byte representing shades of gray and including individual bits.

9. A method as defined in claim 8, wherein each byte corresponding to a pixel is read out;

and storing a predetermined bit at a predetermined position in said byte at a corresponding address associated with a respective pixel in a bit memory.

10. A method as defined in claim 9, including the step of displaying contents of said bit memory in form of areas of equal value.

11. A method as defined in claim 9, wherein said bit memory has a content stored one position ahead in a row and with same columns in another bit memory, each byte corresponding to a pixel being read out, said another bit memory being a second bit memory and said first-mentioned bit memory being a first bit memory;

advancing a bit designated at a particular position by the byte by one position in the column and storing in same rows in a fourth bit memory, corresponding addresses in said second and fourth bit memory being logically connected to provide an exclusive OR;

storing results in a third bit memory, said second bit memory having a content stored one position ahead in the column and with same rows in said fourth bit memory;

storing results in a fifth bit memory, corresponding addresses in said third and fifth bit memories being logically connected to provide an exclusive OR; and

storing results in a sixth bit memory.

12. A method as defined in claim 11, wherein said sixth bit memory has a content displayed in form of lines of equal value corresponding to isograms.

13. Apparatus for displaying a high-resolution distribution of physical parameters in form of pressures or forces acting at right angles on a stage having a matrix of sensors, comprising:

a matrix of sensors on a stage;

said sensors measuring said parameters and having an electrical output signal;

a displaying monitor for displaying said parameters;

means for converting said output signal to digital values when said output signal in an analog signal;

a results memory for storing digital values of each sensor in a respective address in said results memory;

means for generating from digital values stored in said results memory a first virtual image in form of a matrix of squares with sides of a first predetermined length and representing locations of said sensors;

a pixel memory, each stored digital value being associated with pixel values from said pixel memory;

means for generating from said pixel values a second virtual image in form of a matrix of squares with sides of a second predetermined length differing from said first predetermined length, one virtual image being superimposed on the other virtual image;

a processor for calculating each pixel value from a square area surrounding centrally said pixel value in said second virtual image by determining each area in said first virtual image;

means for weighting each area with stored digital value in said first virtual image by forming products with areas of surrounding squares and summing all products;

means for summing all areas of said surrounding squares;

means for dividing the sum of all products by the sum of all areas of said surrounding squares and forming a quotient;

means for storing said quotient in a corresponding address in said pixel memory, contents of said pixel memory being displayed on said display monitor.

14. Apparatus as defined in claim 13, including controls for controlling said sensors;

said converting means comprising an analog-to- digital converter.

15. Apparatus as defined in claim 13, including at least one bit memory for storing isozones corresponding to areas of equal value;

and an additional monitor for display of said isozones.

16. Apparatus as defined in claim 13, including at least one bit-memory for storing isograms;

and an additional monitor for displaying said isograms.