7results about How to "High test sensitivity" patented technology

A horizontal double-ball quasi-optical cavity testing device for measuring the electromagnetic performance of a thin film material relates to the field of electromagnetic characteristic parameter testing, in particular to a quasi-optical cavity method testing system, and comprises a vector network analyzer (1), a frequency doubling module (2), a waveguide (3), a quasi-optical cavity (4), a sample clamp (5), a bidirectional transmission screw rod (6), a shielding frame (7), a displacement platform (8), a base (9) and a supporting block (10). The quasi-optical cavity (4) is of a double-spherical-cavity structure, is connected with the vector network analyzer (1) in a horizontal manner, and tests a sample by utilizing a resonance method; the sample clamp (5) adjusts the position of the sample by using a displacement platform (8); the shielding frame (7) can restrain miscellaneous molds, and the restraining effect is adjusted through the two-way transmission lead screw (6). The device has the advantages that the double-ball-cavity sensitivity is high, and the device is suitable for thin-film material testing; the horizontal structure is beneficial to connection of the vector network analyzer and the quasi-optical cavity; the double-ball cavity can measure the electromagnetic performance of the thin film material according to different odd and even modes.

The invention relates to the technical field of chloride ion detection, in particular to a method for detecting the content of chloride ions in an electronic-grade organic aluminum compound. The detection method at least comprises the following steps: a sampling step; a sample treatment step: quenching the activity of the sample by using a quenching agent, heating to remove the quenching agent, and diluting with water; a sample detection step: detecting by adopting an ion chromatograph and setting a leacheate concentration gradient program; a data processing step: establishing a standard working curve equation between the chloride ion concentration and the response signal value; and the chloride ion content in the sample is calculated through the equation. According to the method for detecting the content of the chloride ions in the electronic-grade organic aluminum compound, the accuracy, safety and repeatability of the testing method can be improved, and meanwhile the detection method is low in detection limit and high in testing sensitivity.

This invention discloses a single-tooth electromagnetic bandgap resonant cavity for testing dielectric properties in the thickness direction, belonging to the technical field of dielectric property testing for microwave and millimeter-wave materials. The single-tooth electromagnetic bandgap resonant cavity constructed by this method uses the TE test mode. 10n The electric field direction within the cavity is perpendicular to the material thickness direction, enabling the testing of dielectric properties along the Z-axis. This cavity allows for multi-frequency testing, meeting testing requirements within the 2.5GHz to 110GHz frequency range. With a quality factor greater than 3000, it offers higher testing accuracy when measuring dielectric loss. Compared to a double-tooth electromagnetic bandgap resonant cavity, a single-tooth electromagnetic bandgap resonant cavity is simpler, solving the positioning difficulties caused by the need for strict symmetry in the electromagnetic bandgap structure between the two half-cavities, while also reducing manufacturing costs. Furthermore, one side of the single-tooth electromagnetic bandgap resonant cavity is a smooth metal plate, making sample insertion through the gap more convenient.

A copolymer of the present invention includes a repeating unit 1 represented by the following formula and a repeating unit 2 represented by the following formula 2 and can be used for concentrating an antigen by immobilizing an antibody thereto.

The invention discloses a device sample preparation method for a HgCdTe Hall test and a Hall device test method, and the sample preparation method comprises the steps: coating the surface of a pretreated HgCdTe chip with photoresist, and the pretreated HgCdTe chip comprises a passivation layer and a P-type HgCdTe layer; after the photoresist is cured, performing first photoetching on the tellurium-cadmium-mercury chip to obtain a target photoetching pattern; corroding the passivation layer and the P-type tellurium-cadmium-mercury layer which are not protected by the photoresist in the target photoetching pattern to obtain a mesa structure of the Hall rod; removing the photoresist on the surface of the tellurium-cadmium-mercury chip; coating the photoresist on the surface of the tellurium-cadmium-mercury chip again, and photoetching the tellurium-cadmium-mercury chip for the second time; corroding off the passivation layer, which is not protected by the photoresist, on the surface of the cadmium-mercury chip; growing a metal electrode on the surface of the tellurium-cadmium-mercury chip; and scribing the surface of the tellurium-cadmium-mercury chip to obtain a plurality of Hall devices. The structural device prepared by the method can be used for simultaneously testing the Hall resistance and the longitudinal resistance, and is high in testing efficiency and high in testing precision.

The utility model discloses a surface microstructure rotary viscometer rotor for testing a modifier. The surface microstructure rotary viscometer rotor comprises a connecting rod, a rotor body, a surface microstructure layer and an auxiliary stabilizing ring, the connecting rod is used for being connected with a viscometer host, the rotor body is of a cylindrical or conical structure, and a surface microstructure layer is arranged on the outer surface of the rotor body and used for enhancing shear interface coupling with a modifier; the auxiliary stabilizing ring is arranged at the middle part or the lower part of the rotor body and is used for improving the attitude stability in the test process. The structure is helpful for improving the accuracy and repeatability of the rheological test of the modifier, and is suitable for testing a material system with a complex shearing behavior.

The utility model discloses a differential pressure die water-cooling leak hunting device which comprises a pressure supply system, the pressure supply system comprises a water inlet pipe communicated with a high pressure water source, the water inlet pipe is communicated with a series connection device used for being connected with a die water segregator, and the series connection device comprises a series connection water pipe connected with the water inlet pipe. A series connection water hole is formed in the series connection device corresponding to a cooling water path of the mold water segregator, and is communicated with a series connection water pipe. According to the utility model, the mold cooling water channels are connected in series by arranging the series connection device, the rapid butt joint of the cooling water channels is realized, the trouble of connecting the cooling water channels one by one is avoided, the test efficiency is greatly improved, and the labor intensity is reduced; by arranging the air inlet pipe, the pressure of the leak hunting device is maintained by adopting compressed air in the leak hunting process, and the problem of high energy consumption is solved; meanwhile, compressed air is adopted to continuously supply pressure to the leak detection device, so that a tester can timely and accurately find a leakage point of the cooling water channel by identifying airflow sound, and the test sensitivity is improved.