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10 results about "Biosensor" patented technology

A biosensor is an analytical device, used for the detection of a chemical substance, that combines a biological component with a physicochemical detector. The sensitive biological element, e.g. tissue, microorganisms, organelles, cell receptors, enzymes, antibodies, nucleic acids, etc., is a biologically derived material or biomimetic component that interacts, binds, or recognizes with the analyte under study. The biologically sensitive elements can also be created by biological engineering. The transducer or the detector element, which transforms one signal into another one, works in a physicochemical way: optical, piezoelectric, electrochemical, electrochemiluminescence etc., resulting from the interaction of the analyte with the biological element, to easily measure and quantify. The biosensor reader device with the associated electronics or signal processors that are primarily responsible for the display of the results in a user-friendly way. This sometimes accounts for the most expensive part of the sensor device, however it is possible to generate a user friendly display that includes transducer and sensitive element (holographic sensor). The readers are usually custom-designed and manufactured to suit the different working principles of biosensors.

Sample measurement device, sample measurement system and sample measurement method

ActiveUS20100283488A1Reduce measurement errorImmobilised enzymesBioreactor/fermenter combinationsMeasurement deviceVoltage source
A sample measurement device (110), in which a biosensor (30) having an electrode is mounted, voltage is applied to the electrode, and the concentration of a specific component in a sample deposited on the biosensor (30) is measured, comprises a voltage source (19) configured to apply voltage to the electrode, a time measurement component (22), and a controller (18) configured to control the voltage to be applied and measure the concentration of the specific component. The time measurement component (22) measures a detection time, which is the length of time between the mounting of the biosensor (30) and the deposition of a sample on the biosensor (30). The controller (18) changes a set value for measuring the concentration of a specific component according to the detection time. Consequently, measurement accuracy can be improved regardless of the temperature of the biosensor (30).
Owner:PHC HLDG CORP

Photonic crystal fiber and surface plasma resonance biosensor filled with gold threads

InactiveCN105974515ASimple structureHigh refractive indexCladded optical fibreOptical waveguide light guidePhotonic crystalPlasma resonance
The invention discloses a photonic crystal fiber and surface plasma resonance biosensor filled with gold threads, and belongs to the technical field of fiber sensing. The biosensor includes a fiber core and a cladding. The cladding has a refractive index that is lower than that of the fiber core. At places of air holes in the inner layer of the photonic crystal fiber, a to-be-tested bio-liquid sample is filled, and two air holes of the cladding are filled with the gold threads. An imagery value of fiber core effective refractive index of the biosensor under different wavelengths are obtained, and further transmission loss is calculated, and the wavelength where a surface plasma resonance peak is at and sensitivity of the sensor are obtained through a loss spectra. Different refractive indexes of the to-be-tested bio-liquid samples cause different transmission of wavelengths where the loss spectra resonance peaks. According to the invention, the biosensor combines surface plasma resonance technology and photonic crystal fiber, obtains a sensitivity as high as 1700nm / RIU. The refractive index of the to-be-tested liquid sample has a wide range between 1.37-1.44%. The biosensor has simple structure, is easy to operate, and has wide application potential in the field of sensing.
Owner:TIANJIN UNIVERSITY OF TECHNOLOGY

System and method for assessment of retinal and choroidal blood flow noninvasively using color amplification

ActiveUS20190159707A1Reduce exerciseIncrease contrastImage enhancementImage analysisDigital videoMagnification
A system and method for assessing blood flow include: an ocular lens; a light source; a digital video camera; a biosensor; a trigger; and a computer. The ocular lens is for viewing a fundus of an eye. The light source is for illuminating the fundus. The digital video camera is for imaging the fundus. The biosensor is for sensing a pulse waveform. The computer is configured for: recording input frames and pulse waveform data in response to an input from the trigger; defining a low-pass frequency and a high-pass frequency from the pulse waveform data; stabilizing the input frames; enhancing contrast of the input frames; separating the input frames into sub-channels; conducting eulerian video magnification for color amplification using the inputs of image sampling rate, the low-pass frequency, the high-pass frequency, and an amplification factor; reconstructing the sub-channels into output frames; and combining the output frames with the input frames.
Owner:UNIV OF KENTUCKY RES FOUND

Intelligent anti-counterfeiting system

ActiveCN108932623AAchieve the effect of intelligent anti-counterfeitingSensing record carriersCommerceLiquid ChangeIdentification device
An intelligent anti-counterfeiting system comprises a marking device and an intelligent identification device. The marking device comprises a first housing, biosensors, a first coil assembly, a secondcoil assembly and electrodes. The intelligent identification device comprises a second housing, an electrode holder and a drive circuit board. According to the intelligent anti-counterfeiting system,an AC driving magnetic field coil and a DC bias magnetic field coil generate an alternating magnetic field and a DC bias magnetic field respectively, each of the biosensors has a natural frequency inthe magnetic field, and the natural frequency is used as an identification code. Since the identified liquid is unique under a number of factors, the identified liquid has a unique identification code. When the identified liquid changes in the factors such as volume, density, etc., the frequency of each of the biosensors changes under the driving of the intelligent identification device, i.e., the identification code also changes, so that it can be known that the detected liquid is a counterfeit product, and an intelligent anti-counterfeiting effect can be achieved.
Owner:SHENZHEN LIJIAN BRAIN SCI TECH CO LTD

Anti-interference determination method for enzyme electrode biosensor

ActiveCN109164148AThe measurement result is accurateAccurate and reliable measurement resultsMaterial electrochemical variablesTest sampleEnzyme electrode
An anti-interference determination method for an enzyme electrode biosensor comprises the following steps: constant a and Michaelis constant b are calculated by firstly measuring corresponding currentvalue X of a to-be-tested sample, then measuring corresponding current value Y of the to-be-tested sample and equivalent standard sample and finally measuring corresponding current value Z of the to-be-tested sample and half of the standard sample. Concentration of the to-be-tested sample after compensation is calculated finally, influence of interference factors is eliminated in the determination method, and a determination result obtained with the determination method is more accurate and more reliable under the condition of presence of an interference source.
Owner:BIOLOGY INST OF SHANDONG ACAD OF SCI
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