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62results about How to "Small spread" patented technology

Compact Mass Spectrometer

A miniature mass spectrometer is disclosed comprising an atmospheric pressure ionisation source, a first vacuum chamber having an atmospheric pressure sampling orifice or capillary, a second vacuum chamber located downstream of the first vacuum chamber and a third vacuum chamber located downstream of the second vacuum chamber. A first vacuum pump is arranged and adapted to pump the first vacuum chamber, wherein the first vacuum pump is arranged and adapted to maintain the first vacuum chamber at a pressure <10 mbar. A first RF ion guide is located within the first vacuum chamber and an ion detector is located in the third vacuum chamber. The ion path length from the atmospheric pressure sampling orifice or capillary to an ion detecting surface of the ion detector is ≦400 mm. The mass spectrometer further comprises a tandem quadrupole mass analyser, a 3D ion trap mass analyser, a 2D or linear ion trap mass analyser, a Time of Flight mass analyser, a quadrupole-Time of Flight mass analyser or an electrostatic mass analyser arranged in the third vacuum chamber. A split flow turbomolecular vacuum pump comprising an intermediate or interstage port is connected to the second vacuum chamber and a high vacuum (“HV”) port is connected to the third vacuum chamber. The first vacuum pump is also arranged and adapted to act as a backing vacuum pump to the split flow turbomolecular vacuum pump and the first vacuum pump has a maximum pumping speed ≦10 m3/hr (2.78 L/s).
Owner:MICROMASS UK LTD

Solar panel stretchable device of solar automobile roof

The invention discloses a solar panel stretchable device of a solar automobile roof, and belongs to the technical field of new energy automobile. The solar panel stretchable device comprises an automobile body, wherein a fixing plate is arranged at the top of the automobile body, a first stretchable mechanism and a second stretchable mechanism are arranged between the fixing plate and the top of the automobile body, the first stretchable mechanism comprises a stretchable assembly, a transmission assembly and four unfolding assemblies, a fixing solar panel is arranged at the upper end of the fixing plate, the second stretchable mechanism comprises two drive assemblies and two extension assemblies, the two extension assemblies are both mounted below the fixing plate, the two extension assemblies are matched with the two drive assemblies respectively. Compared with the prior art, through the cooperation work of the four unfolding assemblies and the two extension assemblies, the receivingarea of solar ray can be further increased, meanwhile, when the four unfolding assemblies and the two extension assemblies are completely unfolded, the solar ray can be effectively prevented from directly irradiating into the automobile body, so that the potential safety hazard of the automobile in the high-temperature weather is reduced.
Owner:张波

Broadband short-delay surface acoustic wave delay line

The invention discloses a broadband short-delay surface acoustic wave delay line composed of a piezoelectric substrate, sound-absorbing rubber, shielding strips and transducers. The transducers and the shielding strips are arranged on the piezoelectric substrate. Each of the two pairs of transducers is composed of an input transducer and an output transducer, and the two pairs of transducers are correspondingly arranged in parallel to form a dual-channel structure divided into an upper channel and a lower channel. The shielding strips are arranged between the input transducers and the output transducers, and each shielding strip is composed of a plurality of short-circuit metal strips. The center distance between the input transducer and the output transducer in the upper channel is d1, and the center distance between the input transducer and the output transducer in the lower channel is d2. The difference between d1 and d2 is half a wavelength, which enables acoustic signals As1 and As2 generated by the upper and lower channels to be reversed in phase and electric direct signals to be the same in phase. The input transducers and the output transducers are of a sector structure. The strength of electric direct signals is reduced, large bandwidth can be obtained, and the performance is more stable and reliable.
Owner:BEIJING ZHONGXUN SIFANG SCI & TECH
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