Method for measuring physical quantity distribution and measurement system using sensor for physical quantity distribution
First Claim
1. A measurement system comprising:
- a sensor for physical quantity distribution (PQD sensor) comprising a body for converting physical quantity distribution (PQDc body) that has a base medium, at least six electrodes connected to the base medium, and wirings that connect the electrodes to an electric signal processing part;
a processing part comprising the electric signal processing part and a computation processing part; and
a measurement procedure and an estimation procedure that are executed in the processing part;
said measurement system being characterized in that;
the base medium is an electrically continuous conductive body and has an electric impedance distribution relative to direct current or alternating current,the PQDc body has a regional shape upon which an external force acts and has a structure wherein the condition of injection current flowing through the base medium changes according to a change in distribution of the external force or deformation by the external force, which is a physical quantity of interest,the electric signal processing part has the functions of;
generating injection current for the base medium through the electrodes;
measuring voltage values of electric potential distributions occurring in the PQDc by using the electrodes; and
transmitting/receiving measurement data to/from the computation processing part,the measurement procedure issues commands to the electric signal processing unit to generate injection current using at least two of the electrodes, to generate at least six patterns of the injection current, and to measure as electric potential distribution data the voltage values occurring in the PQDc body due to the injection current by using at least four of the electrodes, and also processes all of the electric potential distribution data in the patterns into measurement data, andthe estimation procedure reads the measurement data and performs an estimation calculation where the measurement data is used to obtain a distribution of the external force or deformation by the external force acting upon the PQDc body, which is the physical quantity of interest.
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Abstract
It is an object of the present invention to provide a measurement system that measures physical quantity distribution over the entire region using a sensor for physical quantity distribution (PQD sensor) that realizes high stretchability, flexibility, etc., in at least a partial region, in order to measure the physical quantity distribution that is regionally distributed in a two-dimensional or three-dimensional manner, as well as a method for measuring physical quantity distribution. Such measurement system comprises: a body for converting physical quantity distribution (PQDc body) structured in such a way that the condition of injection current changes according to the action of the target physical quantity; multiple electrodes arranged in such a way that they can supply injection current to the PQDc body and measure data of the electric potential distribution generated by the PQDc body as a result; a PQD sensor comprising the PQDc body, electrodes, and an electric signal processing unit that processes electrode signals; and a processing part that processes data with the PQD sensor; wherein the measurement method comprises a data acquisition procedure to cause electrodes to generate injection current and measure the electric potential distribution that generates in the PQDc body, which is used as measured data, and an estimation procedure to read the measured data and use the read data to obtain the distribution of the target physical quantity that acts upon the PQDc body.
32 Citations
13 Claims
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1. A measurement system comprising:
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a sensor for physical quantity distribution (PQD sensor) comprising a body for converting physical quantity distribution (PQDc body) that has a base medium, at least six electrodes connected to the base medium, and wirings that connect the electrodes to an electric signal processing part; a processing part comprising the electric signal processing part and a computation processing part; and a measurement procedure and an estimation procedure that are executed in the processing part; said measurement system being characterized in that; the base medium is an electrically continuous conductive body and has an electric impedance distribution relative to direct current or alternating current, the PQDc body has a regional shape upon which an external force acts and has a structure wherein the condition of injection current flowing through the base medium changes according to a change in distribution of the external force or deformation by the external force, which is a physical quantity of interest, the electric signal processing part has the functions of;
generating injection current for the base medium through the electrodes;
measuring voltage values of electric potential distributions occurring in the PQDc by using the electrodes; and
transmitting/receiving measurement data to/from the computation processing part,the measurement procedure issues commands to the electric signal processing unit to generate injection current using at least two of the electrodes, to generate at least six patterns of the injection current, and to measure as electric potential distribution data the voltage values occurring in the PQDc body due to the injection current by using at least four of the electrodes, and also processes all of the electric potential distribution data in the patterns into measurement data, and the estimation procedure reads the measurement data and performs an estimation calculation where the measurement data is used to obtain a distribution of the external force or deformation by the external force acting upon the PQDc body, which is the physical quantity of interest. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for measuring physical quantity distribution used in a measurement system comprising:
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a body for converting physical quantity distribution (PQDc body) that has a regional shape upon which an external force acts, has a base medium being a continuous conductive body with an electric impedance distribution, and has a structure wherein the condition of injection current in the base medium changes according to a change in distribution of the external force or deformation by the external force, which is a physical quantity of interest; at least six electrodes connected to the base medium; wirings that connect the electrodes to an electric signal processing part; a sensor for physical quantity distribution (PQD sensor) having the PQDc body, electrodes and wirings; the electric signal processing part that is connected to the wirings, capable of generating injection current for the electrodes, capable of measuring the voltage values of the electrodes, and capable of transmitting/receiving measurement data to/from a computation processing part; the computation processing part capable of transmitting/receiving measurement data to/from the electric signal processing part; and a processing part comprising the electric signal processing part and computation processing part; said method being characterized by a measurement method executed in the processing part comprising; a measurement procedure comprising;
issuing a command to the electric signal processing unit to generate injection current using at least two of the electrodes;
issuing a command to generate at least six patterns of the injection current;
issuing a command to measure, as electric potential distribution data, voltage values occurring in the PQDc body due to the injection current by using at least four of the electrodes; and
also processing all of the electric potential distribution data in the patterns into measurement data; andan estimation procedure comprising;
reading the measurement data; and
performing an estimation calculation where the measurement data is used to obtain a distribution of the external force or deformation by the external force acting upon the PQDc body, which is the physical quantity of interest.
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Specification