5 results about "Cylindrical resonator" patented technology

The present invention relates to an in-operando and non-destructive testing system (10) for testing the aging of at least one electrochemical element of a battery, the in-operando and non-destructive testing system (10) comprising: - a cavity (30); - a source (24) configured to emit L-band electromagnetic waves toward the cavity (30), the cavity (30) comprising a cylindrical resonator (38) with a circular base and having at least one longitudinal cut-out (46, 48); - a detector (28) capable of detecting the waves originating from the cavity (30); and - a processor (34) capable of analyzing the waves detected by the detector (28) in order to obtain at least one item of information relating to the aging of the at least one electrochemical element.

System and method for non-destructive monitoring of the aging of a battery in operation. The present invention relates to an in-operando, non-destructive monitoring system (10) for the aging of at least one electrochemical element of a battery. The in-operando, non-destructive monitoring system (10) comprises: - a cavity (30), - a source (24) configured to emit L-band electromagnetic waves towards the cavity (30), the cavity (30) comprising a cylindrical resonator (38) with a circular base having at least one longitudinal cutout (46, 48), - a detector (28) adapted to detect the waves emanating from the cavity (30), and - a computer (34) adapted to analyze the waves detected by the detector (28) to obtain at least one piece of information relating to the aging of at least one electrochemical element. Figure for the abstract: Figure 1

The present disclosure provides an insulating material capable of achieving both sufficiently high heat dissipation and sufficiently low dielectric loss tangent permittivity. Specifically, the composition contains (a) a specific olefin-aromatic vinyl compound-aromatic polyene copolymer and (b) boron nitride particles, and is characterized in that: the volume ratio of the component (a) to the component (b) is in the range of 98-15: 2-85; the value of the dielectric loss tangent of a cured body of the composition as determined by a split cylinder resonator method at a measurement frequency of 35-42 GHz is 2 * 10 <-3 > or less, and the thermal conductivity of the cured body of the composition as determined by a laser flash method at 23 DEG C is 0.6 [W / m * K] or more.

The application provides a dielectric property testing system and method based on a split fan-shaped resonant cavity, and belongs to the technical field of microwave testing. Different from the structure of an existing split cylindrical resonator, the application adopts a split fan-shaped cylindrical resonant cavity, and cuts a slit on the edges of two surfaces of the split resonator to suppress a spurious mode, so that complete suppression of the spurious mode near the working mode is realized, a relatively pure TE 0n1 mode spectrum is obtained in a wide frequency range, and the single resonant cavity can realize measurement of TE 011 -TE 081 eight modes. In addition, the sample testing area of the resonant cavity is less than one fifth of a traditional cylindrical cavity, so the size of the corresponding sample to be tested is also reduced by less than one fifth, and the processing cost of the sample to be tested can be effectively reduced.

The application relates to the technical field of resonant cavities, in particular to a powder material dielectric property separation type cylindrical resonant cavity based on a quasi-optical cavity, which comprises a box body, an upper cavity, a sample bin and a lower cavity are arranged in the box body, the upper cavity is in a cylindrical structure, the material of the sample bin is flexible polytetrafluoroethylene, magnetic attraction points are respectively arranged on the top and the bottom of the sample bin, the top of the sample bin is magnetically connected with the upper cavity, and the bottom of the sample bin is magnetically connected with the lower cavity; the lower cavity is in a cylindrical structure, a heat insulation sleeve is arranged on the surface of the lower cavity, and a wave-absorbing material layer is attached to the inner wall of the lower cavity; the diamond coating has superhard characteristics and extremely low surface roughness, can significantly reduce the scattering loss of electromagnetic waves on the inner wall of the cavity, can quickly dissipate the heat generated by electromagnetic energy in the cavity, and can inhibit the influence of temperature fluctuation on the Q value; the cavity is divided into three parts, i.e. an upper part, a middle part and a lower part, and is connected through the magnetic attraction points to form a modular quasi-optical cavity, and in combination with the wave-absorbing material layer and high-precision processing, single-mode purity can be realized.