86results about How to "Sensitive detection effect" patented technology

A sensor system that provides an adjustable threshold level for the sensed quantity is described. The adjustable threshold allows the sensor to adjust to ambient conditions, aging of components, and other operational variations while still providing a relatively sensitive detection capability for hazardous conditions. The adjustable threshold sensor can operate for extended periods without maintenance or recalibration. A portable monitoring unit working in communication with the sensor system provides immediate communication of conditions detected by the sensors. The portable monitoring unit allows building or complex management to be in communication with a sensor system at all times without requiring someone to be physically present at a monitoring site. The portable monitoring unit can be equipped with an auditory device for alerting management or a screen for displaying pertinent information regarding an occurring situation so that management can quickly identify and resolve the problem. In addition, the portable monitoring unit can also be equipped with function keys that allow the portable monitoring unit to send instructions back to the sensor system. In one embodiment, the portable monitoring unit also includes a second transceiver for communications over a short wave radio frequency, or with a cellular phone system.

A sensor system that provides an adjustable threshold level for the sensed quantity is described. The adjustable threshold allows the sensor to adjust to ambient conditions, aging of components, and other operational variations while still providing a relatively sensitive detection capability for hazardous conditions. The adjustable threshold sensor can operate for extended periods without maintenance or recalibration. In one embodiment, the sensor is self-calibrating and runs through a calibration sequence at startup or at periodic intervals. In one embodiment, the adjustable threshold sensor is used in an intelligent sensor system that includes one or more intelligent sensor units and a base unit that can communicate with the sensor units. When one or more of the sensor units detects an anomalous condition (e.g., smoke, fire, water, etc.) the sensor unit communicates with the base unit and provides data regarding the anomalous condition. The base unit can contact a supervisor or other responsible person by a plurality of techniques, such as, telephone, pager, cellular telephone, Internet (and/or local area network), etc. In one embodiment, one or more wireless repeaters are used between the sensor units and the base unit to extend the range of the system and to allow the base unit to communicate with a larger number of sensors.

A moisture sensor system is described. In one embodiment, the system provides an adjustable threshold level for the sensed moisture level. The adjustable threshold allows the moisture sensor to adjust to ambient conditions, aging of components, and other operational variations while still providing a relatively sensitive detection capability. In one embodiment, the adjustable threshold moisture sensor is used in an intelligent sensor system that includes one or more intelligent sensor units and a base unit that can communicate with the moisture sensor units. When one or more of the moisture sensor units detects a excess moisture the moisture sensor unit communicates with the base unit and provides data regarding the moisture condition. The base unit can contact a supervisor or other responsible person by a plurality of techniques, such as, telephone, pager, cellular telephone, Internet (and/or local area network), etc. In one embodiment, one or more wireless repeaters are used between the moisture sensor units and the base unit to extend the range of the system and to allow the base unit to communicate with a larger number of sensors.

The invention discloses a quantitative detection method for specific nucleic acid fragments based on the CRISPR technology. The quantitative detection method comprises the following steps: acquiring atreated target nucleic acid sample, and adding the target nucleic acid sample and an aqueous-phase solution into a droplet generation device to generate reaction droplets, wherein the reaction droplets comprise at least one nucleic acid fragment to be tested; amplifying the nucleic acid fragment to be tested in the reaction droplets by using a recombinase polymerase amplification technique, and allowing target gene signals in the nucleic acid fragment to be tested to realize cascade amplification by using a gene editing technique; collecting a positive signal corresponding to a target gene, and converting the positive signal into image data; processing a fluorescence threshold in the image data by using the Poisson distribution principle so as to obtain the test corresponding to the number of the target gene, corresponding to the positive signal, in the nucleic acid fragment to be tested. Thus, rapid efficient quantitative detection of the concentration of the target gene is realizedbased on the CRISPR technology.

The invention discloses a myocardial ischemia auxiliary detecting method based on a deterministic learning theory. The method includes the following steps that data is pre-processed to obtain electrocardiogram ST-T loop data; a deterministic learning algorithm is adopted to conduct local correct modeling on inner system dynamics of an ST-T loop, modeled system dynamics are displayed in a three-dimensional visualization mode to obtain CDVG; according to a CDVG form, and by combining high risk factors and clinic information, auxiliary detecting results are obtained. The method is characterized in that the CDVG is obtained and analyzed based on the deterministic learning algorithm. The method is applicable to myocardial ischemia detecting when an electrocardiogram is not obviously changed, can prompt cardiovascular diseases effectively, can be used for conducting evaluation of a cardiovascular disease treatment effect and has the advantages of being simple in detecting process, economical and noninvasive and reducing burdens of patients and the like.

Chromatographic strip is used in combination with a transmittance detecting system in a test to quantitate analytes in biological fluid. Chemical reagents or conjugate labels are simply absorbed on the passages' materials of the strip. The substrates, affinity reagents, or antibodies are immobilized on transparent beads in the detection cell of the strip. The biological fluid passes through the strip. The captured analytes are detected by transmittance detection for quantification. Uncaptured elements and interferences in the fluid are drained to the absorbent portion of the strip when the fluid passes the cell as a wash. This chromatographic strip with an analyte capture zone simplifies the. procedures that a transmittance detecting system alone cannot overcome. Adjustable light path of the cells in the strip overcome the sensitivity limitation of reflectance detection.

The invention discloses an estimator for monitoring an online state of a power cable by an ultraviolet method. The estimator consists of a partial discharge ultraviolet detection unit, an insulating medium parameter measurement unit, a temperature detection unit, a central control processing unit, a GSM data communication unit and a power management circuit, wherein output ends of the partial discharge ultraviolet detection unit, the insulating medium parameter measurement unit and the temperature detection unit are connected with an input end of the central control processing unit respectively; the output end of the central control processing unit is connected with the input end of the GSM data communication unit through a CAN bus; and the output end of the power management circuit is connected with power ends of the partial discharge ultraviolet detection unit, the insulating medium parameter measurement unit, the temperature detection unit, the central control processing unit and the GSM data communication unit respectively. The estimator is used for the online detection of parameters such as temperature, partial discharge, medium characteristic variation, environment condition and the like of a buried cable, and has the advantages of reliable and flexible detection effect and low detection cost.

The invention provides a time resolution fluorescent biosensor based on a phosphorescent light emitting technology and an application thereof. The time resolution fluorescent biosensor based on the phosphorescent light emitting technology comprises an exciting light path module, a photoelectric signal receiving and converting module, a control system module, an amplifying and shaping circuit, a coding interface circuit and a data cache module. The exciting light path module comprises a main detection exciting light module and an auxiliary optical scanning module. The photoelectric signal receiving and converting module comprises a main detection photoelectric conversion module and an auxiliary scanning photoelectric conversion module. According to the invention, a phosphorescent light emitting material (platinum/palladium porphyrin) is used as a biological marker, and the result is represented in form of an infrared optical signal under green light irradiation and can be interpreted by an instrument so as to quantitively detect a target object to be detected. According to the invention, a chromatographic test strip is divided into a sandwich method mode, a competition law mode, an indirect method mode and a capturing method mode to qualitatively and quantitively detect and analyze different objects to be detected in a sample quickly and sensitively according to different immunoreactions of the objects to be detected.

The invention discloses a sensor and electronic equipment. The sensor comprises a substrate, a first sensing unit and a plurality of magnetic flux collectors. The first sensing unit is used for detecting a magnetic field in the direction of a first sensing axis, the first sensing unit comprises two first magnetic resistance modules and two second magnetic resistance modules which are arranged on the substrate, and the first magnetic resistance modules and the second magnetic resistance modules are connected to form a full-bridge circuit. The included angle between the magnetization direction of the pinning layers of the first magnetic resistance modules and the positive direction of the first sensing axis is defined as alpha, the included angle between the magnetization direction of the pinning layers of the second magnetic resistance modules and the positive direction of the first sensing axis is defined as beta, and alpha and beta are complementary angles. The plurality of magnetic flux collectors are arranged on the substrate, a magnetic gap is formed between every two adjacent magnetic flux collectors, and each first magnetic resistance module and each second magnetic resistance module are respectively located in one magnetic gap. According to the technical scheme, the detection sensitivity of the sensor can be improved.

The invention provides a method for quickly detecting motor closed-loop system stalling. The method comprises the following steps: establishing a motor closed-loop system model according to a PID algorithm; performing backward differential processing on motor input voltage of the motor closed-loop system model to obtain input voltage increment of a motor; performing backward differential processing on actual motor rotating speed of the motor closed-loop system model to obtain the actual rotating speed increment of the motor; when the input voltage increment of the motor is greater than a voltage increment set threshold, the actual rotating speed increment of the motor is less than the speed increment set threshold, the difference of the input voltage of the motor and the maximum value of the input voltage is less than a pressure threshold after performing n sampling cycles, and the actual rotating speed of the motor is less than the rotating speed threshold, enabling the motor closed-loop system to stall, wherein n is positive integer and not less than 1. The method provided by the invention has the advantages that the detection is sensitive, the detection speed is fast, and the precision is high.

The invention relates to a kit for absolutely quantitatively detecting Toxoplasma gondii based on digital PCR and a detection method thereof; the kit is composed of a microdrop digital PCR kit and a plurality of microdrop generator sheets; the detection method is characterized by comprising: (1) extracting total DNA of a test sample; (2) using the total DNA as a template to carry out PCR amplification; (3) placing the PCR production and microdrop reader to read signals, analyzing experimental data to obtain an absolute content of Toxoplasma gondii in the sample. The kit and method can provide direct quantitation in Toxoplasma gondii detection, have no need for standard curves, have the advantages, such as good operational convenience, high speed and efficiency, good specific sensitivity and low cost, etiological diagnosis on Toxoplasma gondii can be effectively carried out, detection rate is increased, the common problems of existing Toxoplasma gondii detection kits, such as low sensitivity and high misdiagnosis rate, are solved, and the kit and method are suitable for clinical investigations and large-scale disease detection and supervision, related preventive and control measures can be collected in time, and economic loss is decreased.

A disc-shaped fluorine ion fluorescence probe and a preparing method thereof are disclosed. The structure of the probe is shown as a formula (III), wherein R1 is separately independently selected from a structure shown in the specification or another structure shown in the specification, R2 is separately independently selected from hydrogen, chlorine or bromine, and R3 is separately independently selected from C3-C8 direct-chain alkyl chains, branched alkyl chains or naphthenic chains. The probe has two detection mechanisms, namely an electron transfer function between perylene diimide units and fluorine ions and a function between the fluorine ions and Si-O bonds, and therefore the probe can detect fluorine ions more rapidly and more sensitively, can exclude interferences of other ions and can selectively detect the fluorine ions. The probe is provided with the three perylene diimide units, and introduced hexahedral silsesquioxane units can effectively increase a distance among the perylene diimide units, and therefore a higher quantum yield in an aqueous solution can be achieved, the probe has excellent luminescence properties and fluorine ion detection is more sensitive.

The invention relates to a moving race detection bearing, comprising an outer race, an inner race and a plurality of balls; the outer race is a fixed race; the inner race is a moving race; a rotary shaft is connected in the inner race; the rotary shaft is provided with a sensor device to detect vibration and temperature of the inner race. The moving race detection bearing has the advantages that traditional fixed race detection is modified into existing moving race detection, the temperature and vibration of the bearing can be detected more sensitively, and the response speed is higher; operating state of the bearing can be detected and monitored online in real time, and the operating state can be controlled in real time.

The invention provides a method and apparatus for determining a time domain parameter of the partial discharge current of a high voltage IGBT. The method includes the following steps: pre-screening partial discharge currents of a high voltage IGBT to obtain partial discharge pulses; then counting the partial discharge pulses that are pre-screened, and extracting the current magnitudes of the partial discharge pulses; and eventually based on the current magnitudes of the partial discharge pulses, obtaining a time domain magnitude of the partial discharge pulses. According to the invention, thetime domain parameter of the partial discharge pulses obtained by the method herein can sensitively detect and identify the defect of insulation in the process of designing and manufacturing the highvoltage IGBT. And in case the large amount of original data obtained from tests do not undergo denoise pre-processing, the method herein can accurately and rapidly extract the time domain parameter ofthe partial discharge pulses of the partial discharge currents, and further acquires a partial discharge mode in presence of the defect of insulation of the high voltage IGBT.