3 results about "Electrical capacitance tomography" patented technology

The application discloses a kind of based on electromagnetic field momentum's electrical capacitance tomography method and gradient signal detection device, the method is based on electromagnetic field momentum reciprocity theorem, reconstructs dielectric constant by the gradient signal of capacitance.It steps are, first, solve boundary value problem under voltage source excitation, construct sensitivity matrix or the gradient of sensitivity matrix;Second, construct ECT-EMM linear equation under suitable coordinate system;Then, obtain the gradient signal of sensor receiving electrode's capacitance by signal detection part;Again, reconstruct dielectric constant distribution using sensitivity matrix or the gradient of sensitivity matrix, coordinate system related coefficient vector and the gradient signal of capacitance.It gradient signal detection device includes: signal generating part, sensor, signal detection part, signal amplification part and signal acquisition and imaging algorithm part.The imaging method proposed in the application has the advantages of high imaging resolution and can meet the needs of different industrial environments.

This invention relates to a method for dual background image reconstruction and fusion in capacitance tomography, the method being as follows: (1) Constructing a capacitance tomography system model and obtaining the sensitivity fields of two capacitance tomography systems that form a dual background relationship. (2) Obtaining capacitance measurement data of a pipe filled with a first medium A and a second medium B; simultaneously obtaining capacitance measurement data with the first medium A as the background and the second medium B as the object under test. (3) Using the Landweber iterative algorithm, reconstructing images with the first medium A and the first medium B as the background respectively, and obtaining their reconstructed image results. (4) Fusing the reconstructed image results based on physical consistency constraints, and outputting the final fused image reconstruction result. This invention improves the quality of the reconstructed image, making the reconstructed medium distribution closer to the real distribution; it also improves the robustness and consistency of the image reconstruction results.

This invention discloses a non-invasive capacitive tomography (CTT) platform for tracing the motion trajectory of micro / nano dust particles in GIS / GIL (Gas Insulator / Gas Inlet) systems. The platform comprises six parts: a GIS / GIL model, a capacitive sensor module, a signal generation module, a data acquisition module, an image reconstruction module, and a control module. The GIS / GIL model includes a high-voltage conductor, a GIS / GIL pipe shell, a basin-type insulator, and a support. Micro / nano dust particles simulating mechanical friction are placed on the GIS / GIL pipe shell; other connecting and protective devices are omitted. The entire device is placed in air and, when pressurized, can simulate the actual operation of a GIS / GIL in air. The capacitive sensor module is placed outside the GIS / GIL model. The measuring cylinder is made of acrylic and has a uniformly distributed electrode array. The electrode array is connected by electrode leads, with one circle along the tangential direction of the measuring cylinder forming a group of excitation / detection electrodes, which are then input to the data acquisition module via a serial bus. A shielding cover is placed outside the entire capacitive sensor module to isolate external interference, and a shielding ring is placed to concentrate the axial electromagnetic field, thereby improving sensor sensitivity.