6results about How to "Reduce coupling interference" patented technology

The invention provides a surface acoustic wave temperature sensor, a manufacturing method and a demodulation system, and belongs to the technical field of sensors. The sensor comprises a piezoelectric substrate, four groups of interdigital transducers formed on the piezoelectric substrate, four groups of reflecting gratings and a group of planar antennas, wherein the surface of the piezoelectric substrate between the two groups of interdigital transducers is covered with a temperature sensitive film, and the two groups of reflecting gratings, the two groups of interdigital transducers, the temperature sensitive film and the piezoelectric substrate form a detection resonance area; the other two groups of interdigital transducers, the other two groups of reflecting gratings and the piezoelectric substrate form a reference resonance region; an isolation groove is formed in the piezoelectric substrate between the detection resonance area and the reference resonance area; and one end of the planar antenna is connected with the group of interdigital transducers in the detection resonance area, and the other end of the planar antenna is connected with the group of interdigital transducers in the reference resonance area. According to the invention, differential compensation of common-mode interference is realized, propagation of surface acoustic waves of the detection resonance area to the reference resonance area is blocked through the isolation groove, and coupling interference between the two resonators is reduced.

The application provides a cross-band coupling interference suppression structure, a suppression system and a suppression method. In the cross-band coupling interference suppression structure, a low-frequency antenna is fixed at a first height position above a frequency selective surface and used for transmitting a low-frequency signal; a high-frequency antenna unit is fixed at a second height position below the frequency selective surface and used for transmitting a high-frequency signal; the frequency selective surface is used for reflecting the low-frequency signal and transmitting the high-frequency signal; and a reflection layer is arranged below the low-frequency antenna unit and used for reflecting the high-frequency signal. The application sets the frequency selective surface capable of transmitting the high-frequency signal and reflecting the low-frequency signal in the cross-band structure, enhances the radiation performance of the low-frequency signal of the low-frequency band antenna by reflecting the low-frequency signal, keeps the high-frequency band antenna electromagnetically transparent, avoids introducing additional insertion loss, reduces the cross-band coupling interference, and improves the working stability of the interference suppression structure.

The application discloses a multi-winding transformer, which comprises a framework and a magnetic core body fixed on the framework, and a first primary winding N1, a first secondary winding N2, a second secondary winding N3, a second primary winding N4 and a shielding layer winding N5 are sequentially and layer by layer wound on the framework; when the second primary winding N4 is wound, the second primary winding N4 is wound on the take-up end of the first primary winding N1, and the start end and the take-up end of the first primary winding N1 and the start end of the second primary winding N4 are all sleeved with an insulating sleeve for providing insulation protection. The primary winding is wound in a layered manner, and the secondary winding is wrapped, so that the magnetic resistance between the primary winding and the secondary winding is reduced through the structure of being tightly wrapped, the coupling interference caused by the distributed capacitance and the leakage inductance is reduced, the coupling coefficient between the primary winding and the secondary winding is improved, and the electromagnetic compatibility of the transformer is improved.

The invention provides a water quality detection device and method based on friction nanometer power generation. The method is used for solving the problem that heavy metal ion type identification and concentration quantification are difficult to consider in an existing friction electric signal-based liquid detection method. Comprising a multi-electrode triboelectric sensor, and the multi-electrode triboelectric sensor comprises a substrate, a metal electrode and a triboelectric layer. More than two metal electrodes are arranged between the base plate and the triboelectric layer, the plurality of metal electrodes are sequentially arranged at equal intervals along the length direction of the base plate, during water quality detection, liquid drops are guided to slide along the length direction of the base plate, and the liquid drops sequentially pass through the plurality of metal electrode areas in the sliding process, so that the water quality is detected. And a time sequence-related friction electric signal is generated at each metal electrode. According to the invention, rapid and accurate detection of the type and concentration of heavy metal ions is realized, and the device is simple, portable, low in cost, self-powered, capable of realizing accurate concentration quantification in a wide concentration range, and extremely low in detection limit.

The utility model discloses a controller switch wake-up circuit, and belongs to the field of electronic circuits. Aiming at the problems of high power consumption and high cost of the existing switch wake-up circuit, the utility model provides a controller switch wake-up circuit which comprises a wake-up sub-circuit and an acquisition sub-circuit which are arranged in parallel, and one end of the wake-up sub-circuit and one end of the acquisition sub-circuit are respectively connected with a switch signal; the input end of the wake-up sub-circuit is a switching signal, and the output end is a wake-up source signal for waking up the single-chip microcomputer. The input end of the acquisition sub-circuit is a switching signal, the output end of the acquisition sub-circuit is an acquisition signal of the switching signal, and a wake-up source signal of the wake-up sub-circuit and the acquisition signal of the acquisition sub-circuit are respectively connected with the single chip microcomputer. Through the arrangement of the wake-up sub-circuit, on one hand, the power consumption of the system is obviously reduced, and on the other hand, the wake-up sub-circuit can connect a plurality of switch signals in parallel to serve as a wake-up source signal to be input to the singlechip for wake-up, so that the number of GPIO (General Purpose Input / Output) ports of the singlechip is reduced, the hardware cost is reduced, and the compatibility is improved.

This invention relates to the field of damage detection technology, and in particular to an AI-based method and system for detecting structural damage in supercapacitors. The method includes: acquiring multimodal response data; constructing operating condition labels by combining operating condition parameters; generating reference response data based on the operating condition labels; comparing the multimodal response data with the reference response data to construct a multimodal residual field; and performing structural damage identification by combining the unit topology diagram. This method helps to distinguish normal operating condition fluctuations caused by temperature fluctuations, changes in state of charge, pulse load changes, and equilibrium deviations from abnormal responses caused by structural damage, reducing the impact of operating condition coupling interference on the identification results, and making abnormal features related to structural damage more prominent. This improves the stability and accuracy of online structural damage identification, early localization, and damage type determination.