58results about How to "No loss of sensitivity" patented technology

[The invention teaches the uses of a plurality of electric fields and of orthogonal spray configurations of vaporized analyte which combine so as to operate to enhance the efficiency of analyte detection and mass analysis with a mass spectrometer by reducing vapor in the vacuum system and concomitant noise. Several embodiments of the invention are described for purposes of illustration.] The invention relates to a method and apparatus for improving signal relative to noise without loss of ion collection efficiency in electrospray mass spectrometry, including liquid chromatography / mass spectrometry.

The invention relates to a wide-dynamic-range high-temperature superconducting magnetometer comprising a superconducting quantum probe, a liquid nitrogen Dewar flask, a readout circuit, a data collection system and a micro-processor, wherein the superconducting quantum probe is arranged in a Helmholtz coil, more particularly, the superconducting quantum probe is connected with the Helmholtz coil via the liquid nitrogen Dewar flask, the readout circuit, the data collection system, the micro-processor, a constant-current source gear-selecting circuit and an adjustable constant-current source; and the readout circuit is formed by connecting a signal processing circuit with the constant-current source gear-selecting circuit. By using the standard magnetic field generated by the Helmholtz coil, part of the external magnetic field to be measured can be neutralized, and the value of the residual magnetic field to be measured after neutralization can be always within the dynamic range of the high-temperature superconducting magnetometer, the actual value of the magnetic field to be measured can be obtained by adding the value of the neutralized magnetic field to the detection value of the high-temperature superconducting magnetometer, thus preventing the sensitivity and accuracy of the high-temperature superconducting magnetometer from being reduced, widening the dynamic range thereof and meeting the operation requirements thereof within various measurement environments. Above all, the high-temperature superconducting magnetometer is suitable for the geophysical exploration in field sections where the electromagnetic interference is high.

A rapid cycle dynamic nuclear polarization (DNP) NMR apparatus comprises (i) a cooling unit, configured to cool a sample in a capillary, (b) a DNP polarization unit configured to polarize the sample in the capillary, (c) a stripline-based NMR detector comprising a stripline for NMR analysis of the sample in the capillary, (d) a transport unit configured to guide the capillary from the DNP polarization unit to the stripline of stripline-based NMR detector; and (e) a heating unit configured to heat the sample in the capillary before analysis of the sample by the stripline-based NMR detector. Fast (1D-3D) NMR measurements with high resolution may be obtained.

Systems and methods of discovering damages in structures, systems and methods of modeling how a structure will behave once damage has been discovered, and a structure that does not change it natural frequency if there is loss or addition of mass or stiffness in the structure.

The invention discloses a loudspeaker single body and an assembly method thereof. The loudspeaker single body comprises an outer shell (2), a front cover (1), a finished vibrating diaphragm (3) and an annular sealing body (4), wherein an edge portion (31) of the finished vibrating diaphragm (3) is fixed connected between the front cover (1) and the outer shell (2), so as to form an annular joint region (7) between the edge portion (31) and the front cover (1); the finished vibrating diaphragm (3) is obtained through cutting an original vibrating diaphragm (3') provided with an external supporting ring (31'), and the external supporting ring (31') is arranged on the external part of the front cover (1) and the outer shell (2) and is used for positioning the original vibrating diaphragm (3') in the assembly process; and the annular sealing body (4) surrounds the annular joint region (7), and is configured to perform waterproof sealing on the annular joint region (7).

The invention belongs to the technical field of ground heating, relates to a detection device and a detection method for liquid leakage of a ground heating pipeline, and solves the technical problems that the prior art is unreasonable in design and the like. The device comprises a liquid inlet flow detection device, a liquid outlet flow detection device, a liquid inlet and outlet flow comparer and a flow cut-off valve, wherein the liquid inlet flow detection device, the liquid outlet flow detection device and the flow cut-off valve are connected with the liquid inlet and outlet flow comparer. The detection device and the detection method for the liquid leakage of the ground heating pipeline have the advantages that the design is reasonable, the structure is simple, the working accuracy is high, the sensitivity is good, the operation and the use are easy, and the starting preliminary interference of a ground heating system is eliminated effectively. Besides, due to the fact that an electromagnetic flow-meter is arranged, even during long-term use, the sensitivity reduction of the electromagnetic flow-meter caused by impurity accumulation is prevented, and the working accuracy is guaranteed sufficiently; and a warning device is arranged, so that a warning signal can be sent timely to remind a user or a maintenance worker.

The invention provides an electronic cigarette. The electronic cigarette comprises a sensor, an atomizing component and a liquid storage component, and the sensor, the atomizing component and the liquid storage component are arranged in a shell. The atomizing component is provided with a first airflow passage, a second airflow passage is formed in a space where the sensor is positioned in the shell, the shell is provided with a first air inlet and a second air inlet, the first air inlet is in airflow communication with the first airflow passage, and the second air inlet is in airflow communication with the second airflow passage. The first airflow passage and the second airflow passage are in isolated arrangement through a partition part, so that the sensor is unaffected when a user smokes through a smoke passage, sensitivity reduction of the sensor is avoided, and user experience is improved.

A method and apparatus wherein a plurality of electric fields and of orthogonal spray configurations of vaporized analyte are so combined as to enhance the efficiency of analyte detection and mass analysis. The invention provides reduced noise and increased signal sensitivity in both API electrospray and APCI operating modes.

The present invention discloses a variable area capacitive-type bimodal optimized tuning-fork-type micromechanical gyroscope, relates to a tuning-fork-type micromechanical gyroscope, and belongs to the field of micro electro mechanical system (MEMS). The variable area capacitive-type bimodal optimized tuning-fork-type micromechanical gyroscope includes a glass substrate and a metal electrode; and further comprises a MEMS structure, the MEMS structure can fully use variable area detection comb differential capacitances in a space structure to increase the arrangement number of the variable area detection comb differential capacitances in a limited space. Modal optimization of a detection mode can be realized by connection of an anchor point and a coupled rhombus beam, and modal optimization of a drive mode can be realized by connection of the anchor point and a lever. A U-shaped beam can be used to reduce puadrature coupling error brought by dimension error caused by processing technology defects. The variable area capacitive-type bimodal optimized tuning-fork-type micromechanical gyroscope can realize the modal optimization of the drive mode and the detection mode, can realize the linear conversion of detection capacitance variation and displacement variation under the premise of no reducing of the sensitivity, can effectively solve the small measuring range problem of a varied spacing capacitance microgyroscope, and can reduce the quadrature coupler error.

The invention relates to a broadband vector hydrophone with a glass fiber reinforced plastics acoustic transmission cap package, and solves the problems that current hydrophone is narrower in frequency response range and larger in frequency response curve fluctuation. A metal tube shell of a signal processing circuit board is built in the hydrophone. A chip vibration damping support body is arranged on the top face of the metal tube shell. The chip vibration damping support body is provided with a four-beam sensitive micro-structure and a sensitive column. The acoustic transmission cap is fixed on the metal tube shell. The four-beam sensitive micro-structure, the sensitive column and the chip vibration damping support body are packaged in the acoustic transmission cap which is filled with a medium: silicon oil. The hydrophone is improved in the aspect of materials of the acoustic transmission cap, and a glass fiber reinforced plastics material replaces current polyurethane material. Under the circumstance that the sensitivity of the vector hydrophone is not affected, the frequency band of the hydrophone is expanded, the frequency response is improved, and the performance index of the hydrophone is greatly improved. The broadband vector hydrophone has a good application prospect.

A system for testing low-density biochip is composed of exciting light unit, fluorescence signal acquiring unit, and signal detecting unit. The said exciting light unit consists of light source, control power supply, infrared filter and lens set. The said fluorescence signal acquiring unit is composed of optical fibre set, optical fibre fixer, isolating filter and planar moving device for opticalfibre set. Said signal detecting unit comprises photoelectric converter, signal amplifier and computer. A process for testing said biochip includes receiving the optical signals from biochip, converting to electric signals, amplifying, and judging the characteristics of points on chip according to amplitude of signal.

An accelerated speed sensor (1A) having a high voltage sensitivity and capable of preventing reduction of polarization due to pyroelectric effect, comprises a piezoelectric element (2) and support members (10, 11) for supporting the piezoelectric element at both longitudinal ends thereof, the piezoelectric element is laminated with three piezoelectric layers (2a, 2b, 2c), each of the two outer piezoelectric layers (2a, 2c) are longitudinally divided into four units (1)-(4), (5)-(8), respectively, when being applied accelerated speeds. Interlayer electrodes (3, 4) and main surface electrodes (5a, 5b, 6a, 6b) are provided on the piezoelectric element (2) so that two cells (1, 2, 5, 6) on one side of the piezoelectric element and two cells (3, 4, 7, 8) on the other side are connected respectively, and the parallel-connected two sets of cells on the two sides are connected in series. The electrodes (5a, 6a), (5b, 6b) induced to different ends of the piezoelectric element (2) are connected with each other.

A defect detecting apparatus of the present invention includes: a camera that shoots a baseplate and outputs an electrical signal; and an image processing apparatus, the electrical signal outputted from the camera is inputted into the image processing apparatus. The image processing apparatus uses a larger picture contrast of signal selected from a plurality of electrical signals to detect a defect portion of the baseplate. Because of this, even the defect portion with small contrast that exist before the distinction of signals can be detected without a lower sensitivity.

The invention discloses a smoke alarm easy to install. The smoke alarm comprises an alarm body; an installation base is fixedly connected to the top of the alarm body, a fixing base is arranged on theupper surface of the installation base, the top of the fixing base is fixedly connected with a ceiling, and the installation base and the fixing base are removably connected; and at least two protection vanes are arranged around the alarm body, and a vane opening and closing device is connected to the upper portions of the multiple protection vanes and arranged in the installation base. Comparedwith the prior art, the smoke alarm easy to install has the advantages that the structure is compact, the practicability is high, a user can easily and conveniently achieve installation, fixing and removal between the installation base and the fixing base, the stabilization effect is good, the removal efficiency is high, and operation is easy and capable of saving labor; and meanwhile when a fireoccurs, the protection vanes can be telescoped and form protection on the outer side of the alarm to form a protection wall, and therefore the device can achieve certain heat insulation protection andachieve a self protection function.

The invention relates to a magnetoelectric composite material and a preparation method thereof. An adopted piezoelectric fiber is of a hollow structure and polarized in the radial direction. Except for one end of the piezoelectric fiber, a mixture of magnetostriction particles and resin fills the hollow structure of the piezoelectric fiber and the portion outside the piezoelectric fiber, the interior and the exterior of the piezoelectric fiber are coated with electrode materials, and an annular electrode belt which is not coated is arranged on the outer surface of one end of the piezoelectric fiber. The magnetoelectric composite material based on the hollow piezoelectric fiber is successfully prepared for the first time for overcoming the shortcomings of an existing magnetoelectric composite material. According to the obtained magnetoelectric composite material, the adjustable range of the volume fraction of the magnetic phase is large, and the contact area of the magnetic phase and the piezoelectric phase is large. When the volume fraction of the magnetostriction particles is increased, the composite material is prevented from being changed into a conductor from an insulator. The magnetoelectric composite material can be well applied to the magnetoelectric sensor field, the intelligent filter field, the high-density magnetic recording field and the like.

The invention discloses a self-protective smoke alarm, comprising an alarm body. A mounting seat is fixedly connected to the top of the alarm body, and has a fixing seat arranged on the top. The top of the mounting seat is fixedly connected to a ceiling. The mounting seat is detachably connected to the mounting seat. At least two protective blades are arranged around the alarm body. The upper partof the plurality of protection blades is connected with an opening and closing device of the same blade, and the opening and closing device of the blade is arranged on the mounting seat. Compared with the prior art, the self-protective smoke alarm has the advantages of compact structure, strong practicability, good stability effect, high disassembly efficiency, and simple and labor-saving operation. The user can easily and conveniently mount, fix and dismount the mounting seat and the fixing seat by using the locking member of the fixing seat and a horizontal clamping rod. The protective blade can be contracted and protected on the outer side of the alarm to form a protection wall when a fire is encountered, thereby providing a certain thermal insulation protection to the device, so thatthe device also has self-protection function.

As to an electromagnetic radiation detecting apparatus, a radiation detecting apparatus, a radiation detecting system and a laser processing method, a TFT is disposed on an insulating substrate. A conversion element converting electromagnetic radiation into an electric signal is disposed over the TFT. A member for marking the position of the switching element is disposed on the conversion element. The position of a switching element having a defect can be located by means of the member on the conversion element. By radiating laser light to be focused on the member, it becomes possible to perform repair accurately.

The invention discloses a multifunctional iso-rare-earth metal-organic fluorescent material. A chemical formula of the fluorescent material is [Tb0.68Yb0.32(tzbt)(H2O)2]n, wherein tzbt represents 1-(1, 3, 4-triazolyl)-2, 4, 6-trimesic acid radical, a valence state is a negative tervalence, and n only represents that an internal molecule assembly of the material is infinite alternating arrangementof simplest molecular formulas. A preparation method comprises the steps of adopting the 1-(1, 3, 4-triazolyl)-2, 4, 6-trimesic acid as a ligand, adopting rare earth terbium and ytterbium ions as a metal center, and the terbium / ytterbium iso-rare-earth metal-organic fluorescent material is synthesized through a solvothermal method. The terbium / ytterbium iso-rare-earth metal-organic fluorescent material synthesized by the invention has good water stabilization, the high-efficiency recyclable fluorescence detection of sulfamethazine (SMZ), ronidazole (RDZ) and nitrofuran antibiotics (NZF and NFT) can be realized through regulating different excitation wavelengths, and the material has the advantages of simplicity and convenience in synthesis, high sensitivity, recyclability and the like.

The chemical formula of a terbium-based rare earth crystalline material is [Tb(TZBT)(H2O)2]n, wherein n represents positive infinity, TZBT represents a 1-(1,3,4-triazolyl)-2,4,6-trimesic acid radical,and the valence state of TZBT is negative trivalence. The material emits strong fluorescence, can be used for detecting antibiotics in water, and belongs to the field of crystalline materials and fluorescence detection materials. A preparation method of the material is characterized in that an organic ligand 1-(1,3,4-triazolyl)-2,4,6-trimesic acid and terbium nitrate hexahydrate undergo a solvothermal reaction in a mixed solution of N,N-dimethylformamide and water under a closed condition under the adjusting action of a surfactant polyethylene glycol 400 to obtain the terbium-based rare earthcrystalline material. The terbium-based rare earth crystalline material has the advantages of simple synthesis process, high crystal purity, high yield, good reproducibility, and high stability in water solutions, and can highly selectively detect the antibiotic sulfamethazine (SMZ) in various antibiotic aqueous solutions.

The invention provides a position indicating device and a position indicating method, and relates to the field of digital circuit processing. In order to improve the position precision of the indicating device at a detecting position, and on the premise that the sensitivity of the position indicating device is not lowered, the technical scheme is that the position indicating device comprises a bleeder circuit. The bleeder circuit is respectively connected with a resonance circuit and a rectifying filter circuit. The bleeder circuit obtains a regulated proportion of signals from signals output by the resonance circuit and outputs the regulated proportion of signals to the rectifying filter circuit. The position indicating device and the position indicating method are applicable to digital handwriting pens.

The invention relates to a method for automatically switching power frequency protection fixed values. A power frequency component ID_fund of DC current in a DC circuit of a deicing device is utilized to form over power frequency protection; the power frequency protection adopts two high and low fixed values; initially the high fixed value is adopted; when a converter value of the deicing device is unlocked, and the sudden decrease of a power frequency component UD_fund of DC voltage in the DC circuit of the deicing device and the sudden increase of the ID_fund occur simultaneously, the high fixed value is adopted; the low fixed value is adopted when the sudden decrease of the UD_fund and the sudden increase of the ID_fund do not occur simultaneously; and a difference value of the high fixed value and the low fixed value is the value of the current inducted in a deicing circuit when parallel circuits work normally. The method can effectively judge whether the DC deicing circuit is normally inducted by other AC circuits distributed in parallel on the same tower to generate the power frequency components so as to automatically switch the two high and low fixed values of the power frequency protection, avoid false operation of the power frequency protection and not to reduce the sensitivity of the power frequency protection for a single circuit or an equivalent signal circuit.

A gear mounting structure for a fishing reel includes a screw shaft, a gear component and a ring member. The screw shaft has a shaft body, a spiral groove and a mounting part provided at an end of the shaft body. The spiral groove has a crossing point on an exterior circumference of the shaft body. The gear component has a gear body, a plurality of gear teeth and a mounting cavity. The gear teeth are formed in a circumferential direction along an exterior circumference of the gear body. The mounting cavity is for non-rotatably mounting the mounting part. The ring member has an elastic body interposed between the mounting part and the mounting cavity.

The invention provides a preparation method and structure of a series superconducting quantum interference device array based on a superconducting bridge junction. The series superconducting quantum interference device array structure based on the superconducting bridge junction has a nano-bridge structure, and a plurality of SQUID arrays connected in series are formed. Therefore, the structure has the characteristics of high junction current density and small parasitic capacitance. Through the series superconducting quantum interference device array structure with nanojunctions, the structurecan be reduced to the nanoscale, and the ability to resist external magnetic field interference is higher. Through the series SQUID array, the whole system of the series superconducting quantum interference device array structure based on the superconducting bridge junction has a larger bandwidth, the impedance matching problem is avoided, and the working frequency range is greatly increased. Therefore, the prepared series superconducting quantum interference device array structure based on the superconducting bridge junction has stronger anti-interference capability, higher bandwidth and better output signal-to-noise ratio.

The invention discloses a system and method for expanding the measurement bandwidth of a Rogowski coil current sensor, and the system is characterized in that the output of each sub-coil is connected with a voltage follower, and the dotted terminal of each sub-coil is connected with the grounding terminal of the corresponding voltage follower; the number of the input ends of the multi-path input summator is the same as that of the summators, and the output end and the grounding end of each voltage follower are respectively connected with one input end and one grounding end of the multi-path input summator. Parasitic parameters of an original Rogowski coil are reduced in the mode that the original Rogowski coil is divided into a plurality of sub-coils, each sub-coil is connected with a voltage follower, and induced voltages, output by the voltage followers, of the sub-coils are added through an adder and then output. The measurement bandwidth of the Rogowski coil current sensor can be expanded by multiple times on the premise that the sensitivity, the anti-electromagnetic interference capability and the coil appearance size of the Rogowski coil current sensor are not reduced, and the Rogowski coil current sensor has wide practical application capability.

The invention discloses a smoke alarm capable of self-protection, which comprises an alarm body. The alarm body is detachably connected, and at least two protective blades are arranged around the alarm body. The upper parts of the plurality of protective blades are connected with the same blade opening and closing device, and the blade opening and closing device is arranged in the mounting seat. Compared with the prior art, the present invention is compact in structure and strong in practicability, and the user can simply and conveniently realize the installation, fixation and disassembly between the mounting seat and the fixing seat through the cooperation of the fixing seat lock piece and the horizontal clamping rod, which is stable and stable. The effect is good, the removal efficiency is high, and the operation is simple and labor-saving; at the same time, in case of fire, the protective blades can be shrunk and protected on the outside of the alarm to form a protective wall, so as to provide certain heat insulation protection for the device, so that the device itself is also protected. It has its own protection function.

The chemical molecular formula of the terbium-based rare earth crystalline material of the present invention is [Tb(TZBT)(H 2 O) 2 ] n ; Wherein, n represents positive infinity, TZBT represents 1-(1,3,4-triazolyl)-2,4,6-tricarboxylate, and its valence is negative trivalent. The invention has strong fluorescence emission, can be used for the detection of antibiotics in water, and belongs to the field of crystalline materials and fluorescence detection materials. The preparation method of the material is as follows: under closed conditions, the organic ligand 1-(1,3,4-triazolyl)-2,4,6-trimesic acid and terbium nitrate hexahydrate in N,N-di In the mixed solution of methylformamide and water, the surfactant polyethylene glycol 400 is used to adjust, and the terbium-based rare earth crystalline material is obtained through solvothermal reaction. The advantages of the present invention are: the synthesis process of the terbium-based rare earth crystalline material is simple, the crystallization purity is high, the yield is high, and the reproducibility is good; it has high stability in aqueous solution; and antibiotics can be detected with high selectivity in various antibiotic aqueous solutions Sulfamethazine (SMZ).

The invention relates to a solid body shooting device and an electronic device having the same. The solid body shooting device comprises a photoelectric conversion film which is disposed outside of a semiconductor substrate and between two transparent electrodes. The surface of the photoelectric conversion film is disposed in a manner of inclining with respect to the front surface of the semiconductor substrate. High photoelectric conversion efficiency can be achieved without reducing the sensitivity of the photoelectric conversion film.

The present invention relates to a compound, a photoresist composition comprising same, a photoresist pattern comprising same, and a method for manufacturing a photoresist pattern.

The invention discloses an isolated low-noise micro-current amplifier which is an amplifier circuit for amplifying micro-current of a reference measurement signal in a micro-coulometry analyzer. The isolated low-noise micro-current amplifier comprises an indicating electrode pair consisting of a reference electrode (12) and a measuring electrode (13) which are inserted into electrolyte, and an electronic switch A, and the isolated low-noise micro-current amplifier is characterized in that an energy amplifier (16) is arranged among the reference electrode (12), the measuring electrode (13) and the electronic switch A, and is used for amplifying a voltage signal for reflecting the concentration change of the electrolyte; the energy amplifier (16) mainly comprises a group of symmetrical positive and negative power supplies (22, 23) and a high input impedance operational amplifier (24); the output end of the electronic switch A outputs the voltage signal amplified by the energy amplifier (16). Therefore, the analysis precision of the micro-coulometry analyzer can be greatly improved, the 0.1ppm sample content can be detected under general analyzing and operating conditions, and the sample content greatly exceeds the detection lower limit of 0.2ppm specified in the industrial standard.

The invention discloses a smoke alarm with a wide application range. The top of an alarm body is fixedly connected with a mounting base; a fixed seat is arranged above the mounting base; the top of the fixed seat is fixedly connected with a ceiling; the mounting base is detachably connected with the fixed seat; a blade protection device is arranged around the alarm body; the bottom of the inner cavity of the mounting base is provided with a sliding part base; a horizontal sliding part is arranged in the sliding part base; the sliding part base is vertically connected with a fixed seat lockingpart; horizontal clamping rods are arranged over against each other on both sides of the fixed seat locking part; and the two horizontal clamping rods are fixedly with the horizontal sliding part through stabilizer rods respectively. Compared with the prior art, the smoke alarm has the advantages of compact structure and high practicability. A user can easily and conveniently realize the mounting,fixation and disassembly between the mounting base and the fixed seat with a good stabilizing effect. Meanwhile, a protective blade can be contracted and protected on the outer side of the alarm to form a protective wall, so that the device can be insulated to a certain extent, and has an own protective function.