Pressure measurements by signal fitting

1 . A pressure signal measuring method, comprising the steps of:

while applying a pressure to each of an array of sensing points in a pressure acquisition apparatus by a pressure applying device, measuring and integrating a relationship between the applied pressure and a resistance of each sensing point to obtain a pressure-resistance relationship,

wherein the pressure acquisition apparatus comprises:

a plurality of the array of sensing points, each of which has a pressure sensing zone at which pressure is measured, and

a non-pressure sensing zone at which pressure cannot be measured;

correcting the obtained pressure-resistance relationship by integration through a numerical filtering algorithm and fitting the corrected pressure-resistance relationship through a curve fitting formula to obtain an optimized pressure-resistance relationship;

switching the arrayed sensing points in the pressure acquisition apparatus to connect to a voltage sensing circuit by an integrated analog electronic switch to measure voltages of the plurality of arrayed sensing points pressurized respectively;

calculating resistances of the plurality of arrayed sensing points pressurized according to the measured voltages and in conjunction with an acquisition circuit in the pressure acquisition apparatus;

calculating pressures of the plurality of arrayed sensing points in the pressure acquisition apparatus through the optimized pressure-resistance relationship according to the calculated resistances,

wherein the calculated pressures of the plurality of arrayed sensing points are pressures on pressure sensing zones of the plurality of arrayed sensing points; and

based on areas of pressure sensing zones and non-pressure sensing zones of the plurality of sensing points pressurized, calculating actual pressures of the plurality of arrayed sensing points from the calculated pressures on the pressure sensing zones of the plurality of arrayed sensing points through a relationship between the pressures and areas,

wherein each of the calculated actual pressures of the plurality of arrayed sensing points are a sum of the pressures on the pressure sensing zone and the non-pressure sensing zone of each arrayed sensing point.

2 . The method according to claim 1 , further comprising visually displaying the optimized pressure-resistance relationship through a point depiction method using drawing software.

3 . The method according to claim 1 , wherein measuring voltages of a plurality of arrayed sensing points pressurized respectively comprises:

measuring voltages of the plurality of arrayed sensing points pressurized by an on-chip integrated analog electronic switch or an off-chip digital-to-analog converter.

4 . The method according to claim 3 , further comprising outputting the measured voltages through a conversion unit of the digital-to-analog converter.

5 . The method according to claim 1 , further comprising appropriately increasing or decreasing the number of the integrated analog electronic switches based on the number of rows and columns of the pressure sensor.

6 . The method according to claim 1 , further comprising displaying a zone where the pressure applying device applies the pressure to the arrayed sensing points through a heat map.

7 . The method according to claim 1 , wherein fitting the corrected pressure-resistance relationship through a curve fitting formula comprises:

selecting corresponding curve fitting betweenness to fit the corrected pressure-resistance relationship.

8 . The method according to claim 1 ,

wherein each of the actual pressures of the plurality of arrayed sensing points are calculated based on the following formula:

F

n

=

F

P

*

s

P

+

s

U

s

P

;

wherein, S p is the area of the pressure sensing zone P of each sensing point, S u is the area of the non-pressure sensing zone U of each pressure point, F P is the actual pressure of the pressure sensing zone P, and F n is the actual pressure of corresponding sensing point.

9 . A pressure signal measuring apparatus comprising a processor and a non-transitory memory, wherein the non-transitory memory stores computer instructions, and the processor is configured to execute the computer instructions stored in the non-transitory memory, wherein, when the instructions are executed, the apparatus performs the following:

while applying a pressure to each of an array of sensing points in a pressure acquisition apparatus by a pressure applying device, measuring and integrating a relationship between the applied pressure and a resistance of each sensing point to obtain a pressure-resistance relationship,

wherein the pressure acquisition apparatus comprises:

a plurality of the array of sensing points, each of which has a pressure sensing zone at which pressure is measured, and

a non-pressure sensing zone at which pressure cannot be measured;

correcting the pressure-resistance relationship obtained by integration through a numerical filtering algorithm, and fitting the corrected pressure-resistance relationship through a curve fitting formula to obtain an optimized pressure-resistance relationship;

switching the arrayed sensing points in the pressure acquisition apparatus to connect to a voltage sensing circuit by an integrated analog electronic switch to measure voltages of the plurality of arrayed sensing points pressurized respectively;

calculating resistances of the plurality of arrayed sensing points pressurized in the pressure acquisition apparatus according to the measured voltages and in conjunction with an acquisition circuit;

calculating pressures of the plurality of arrayed sensing points in the pressure acquisition apparatus through the optimized pressure-resistance relationship according to the calculated resistances,

wherein the calculated pressures of the plurality of arrayed sensing points are pressures on the pressure sensing zones of the plurality of arrayed sensing points; and

based on areas of pressure sensing zones and non-pressure sensing zones of the plurality of sensing points pressurized, calculating actual pressures of the plurality of arrayed sensing points from the calculated pressures on the pressure sensing zones of the plurality of arrayed sensing points through a relationship between the pressure and an intensity of pressure and areas,

wherein each of the calculated actual pressures of the plurality of arrayed sensing points are a sum of the pressures on the pressure sensing zone and the non-pressure sensing zone of each arrayed sensing point.

10 . The apparatus according to claim 9 , further comprising visually displaying the optimized pressure-resistance relationship through a point depiction method using drawing software.

11 . The apparatus according to claim 9 , wherein measuring voltages of a plurality of arrayed sensing points pressurized respectively comprises:

measuring voltages of the plurality of arrayed sensing points pressurized by an on-chip integrated analog electronic switch or an off-chip digital-to-analog converter.

12 . The apparatus according to claim 11 , further comprising outputting the measured voltages through a conversion unit of the digital-to-analog converter.

13 . The apparatus according to claim 9 , further comprising appropriately increasing or decreasing the number of the integrated analog electronic switches based on the number of rows and columns of the arrayed sensing points in the pressure acquisition apparatus.

14 . The apparatus according to claim 9 , further comprising displaying a zone where the pressure applying device applies the pressure to the arrayed sensing points through a heat map.

15 . The apparatus according to claim 9 , wherein fitting the corrected pressure-resistance relationship through a curve fitting formula comprises:

selecting corresponding curve fitting betweenness to fit the corrected pressure-resistance relationship.

16 . The apparatus according to claim 9 ,

wherein each of the actual pressures of the plurality of arrayed sensing points are calculated based on the following formula:

F

n

=

F

P

*

s

P

+

s

U

s

P

;

wherein, S P is the area of the pressure sensing zone P of each sensing point, S U is the area of the non-pressure sensing zone U of each pressure point, F, is the actual pressure of the pressure sensing zone P, and F n is the actual pressure of corresponding sensing point.