108results about How to "Reduce measurement bias" patented technology

Disclosed herein is a method for measuring blood glucose levels, using an electrochemical biosensor provided with a converse-type thin-layer electrochemical cell. The electrochemical cell comprising: a working electrode formed on a flat insulating substrate; an auxiliary electrode formed on a separate flat insulating substrate so as to face the working electrode; a fluidity-determining electrode, formed at a predetermined distance from the working electrode on the flat insulating substrate used for the working electrode or the auxiliary electrode; an adhesive spacer, provided with a sample-introducing part having a micro-passage, for spatially separating the working electrode and the auxiliary electrode by being interposed therebetween; an electrode connector, printed with a thick conductive material on a portion of the auxiliary electrode, for three-dimensionally connecting the working electrode to the auxiliary electrode; and a reagent layer containing an electron transfer mediator and an oxidation enzyme.

A method and apparatus for measuring the bore diameter of a hole as a function of hole depth is disclosed. In one embodiment, the apparatus comprises a diametric probe, for generating first measured bore diameter data along a diametric probe sensitive axis; a foot, for positioning the diametric probe sensitive axis in a plane parallel to the hole; a linear distance probe, coupled to the diametric probe, for generating first measured depth data describing the depth of the diametric probe sensitive axis within the hole; and a data acquisition system, for recording first measured bore diameter data from the diametric probe and first measured depth data from the linear distance probe of an insertion of the diametric probe into the hole.

An amplitude measurement unit measures an amplitude of a read signal from a preamble unit in a servo area of a predetermined frame number m per one rotation of the recording medium for a predetermined cycle number n while increasing an electric power amount distributed to the heater in the state in which the head is positioned to a track on the recording medium, and a mean amplitude calculating unit calculates a mean amplitude from an amplitude measurement value which is measured by the number which is the frame number m multiplied by the cycle number n. A contact determination unit calculates a mean amplitude variation amount per a unit heater electric power amount as a contact determination value, and determines that the head is in contact with the recording medium when the contact determination value is lower than a predetermined threshold value, and a flying height calculating unit which calculates a flying height of the head with respect to the surface of the recording medium from the heater electric power amount at the point when contact is determined.

A scan location matching (SLM) method identifies conventional time domain optical coherence tomography (TD-OCT) circle scan locations within three-dimensional spectral domain OCT scan volumes. A technique uses both the SLM algorithm and a mathematical retinal nerve fiber bundle distribution (RNFBD) model, which is a simplified version of the anatomical retinal axon bundle distribution pattern, to normalize TD-OCT thickness measurements for the retinal nerve fiber layer (RNFL) of an off-centered TD-OCT circle scan to a virtual location, centered on the optic nerve head. The RNFBD model eliminates scan-to-scan RNFL thickness measurement variation caused by manual placement of TD-OCT circle scan.

Methods and apparatus for testing wireless devices. Devices being tested receive and transmit radio frequency test signals. These radio frequency test signals are received or transmitted using an antenna associated with the device, and then are transmitted or received using a unique wide-band tapered-slot antenna connected to a test system. The wide-band tapered-slot antenna has an input path that is substantially orthogonal to the tapered slot, and one of the conductors defining the slot is grounded.

A gas sensor having a sensor element that includes an inner space for introducing a measurement gas therein from an external space and a pump cell which has a first electrode formed on a surface of the inner space and a second electrode formed in a space different from the inner space and is provided to pump oxygen out of the inner space by applying a predetermined voltage between the first electrode and the second electrode. Assuming that the length of the inner space in a short-side direction of the sensor element as viewed from the front end portion side thereof is x1 and the length of the inner space in a longitudinal direction of the sensor element as viewed from the front end portion side thereof is x2, the following inequality is satisfied: 0.05≦x1/x2≦0.25.

A method, apparatus and user terminal for measuring with a discovery signal are disclosed in the present document. The method includes: when measuring reference signal receiving quality (RSRQ) based on a discovery signal, performing a received signal strength indication (RSSI) measurement in a sub-frame where a discovery signal is located and/or a sub-frame without the discovery signal; and acquiring the RSRQ according to the measured RSSI. With the present document, the RSSI measurement is performed based on the sub-frame where the discovery signal is located and/or the sub-frame without the discovery signal, which can reduce the measurement deviation caused by the situation that there is no data in a data channel after a cell is closed, and increase the RSRQ measurement accuracy.

The invention discloses a micro-capacitance measuring system. The micro-capacitance measuring system comprises a signal generating module, a capacitance/voltage converting module, a signal collectingand processing module, a CPU and a communication module. The signal generating module comprises a DDS sinusoidal signal generator and a digital-to-analog converter, the signal collecting and processing module includes a programmable amplifier, an analog-to-digital converter and a digital demodulator, an output end of the DDS sinusoidal signal generator is in series connection with the digital-to-analog converter, the capacitance/voltage converting module, the programmable amplifier, the analog-to-digital converter, the digital demodulator and the CPU, a signal input port of the other end of the digital demodulator is connected to the DDS sinusoidal signal generator, and the CPU is also connected to the DDS sinusoidal signal generator, the programmable amplifier and the communication module. The micro-capacitance measuring system can overcome the problem of particle charge interference when charge injection, zero point drift and a measuring object are gas-solid two-phase flow, and the measurement precision is improved. The invention further provides a micro-capacitance measuring method.

A retractable rotor malposition in line adjusting device. The device comprises a flange bracket (1), a radial adjusting screw (2), an axial adjusting screw (3) and a lever indicator (4), wherein the flange bracket (1) is connected to the external motor output shaft through the thread of the flange, and the radial adjustment screw (2) is screwed into the threaded through hole of the boss of the flange bracket (1) through the external thread, the axial adjustment screw 3) is screwed into the threaded through hole of the boss of the radial adjustment screw (2) through the external thread, and the lever dial indicator (4) is fixed to the right end of the axial adjustment screw (3). Adjusting the screw depth of the radial adjusting screw (2) to adjust the radial position in the lever indicator (4) measuring end, adjusting the screw depth of the axial adjusting screw (3) to adjust the axial position at the lever indicator (4) measuring end, all the above adjustment methods are used to adjust the position of the measuring end, further are used to regulate the rotor malposition in line. At the same time, the invention can also be used to realize the measuring function of the rotor's own end face and the cylindrical beating.

The invention provides a multi-camera motion track detection method and device and a storage medium, and the method comprises the steps: setting a grid pattern on the ground, and building a ground coordinate system; pasting an asymmetric pattern on the top of the robot, establishing a pattern coordinate system, and obtaining coordinates of the angular points in the pattern coordinate system; establishing a plurality of cameras are arranged above the ground to shoot grid patterns and pictures of the robot, camera coordinate systems and acquiring pixel coordinates of angular points of the asymmetric patterns in the camera coordinate systems; obtaining a first type of homography matrix of each camera coordinate system relative to the ground coordinate system, a rotation amount and a translation vector between the first type of homography matrix and the ground coordinate system, and an equation of the ground under the camera coordinate system; calculating a rotation amount and a translation vector between the pattern coordinate system and the ground coordinate system; acquiring a second type of motion trajectory pattern of a robot by combining images of each camera. According to the invention, the measurement deviation is reduced, the measurement precision is improved, and the positioning range can be infinitely expanded.

The invention provides a hip joint imaging method and a hip joint imaging system, which are used for obtaining a standard section diagram of a hip joint. The method comprises the following steps: acquiring volume data of the target hip joint; obtaining at least one section diagram of the target hip joint according to the volume data; analyzing the at least one section diagram to obtain analysis data of the at least one section diagram, wherein the analysis data is used for measuring a standard degree of the at least one section diagram; and determining at least one standard section diagram from the at least one section diagram according to the analysis data.

The invention provides an ultralow-temperature-resistant crane moment limiter. The moment limiter consists of a main controller, a long angle sensor, a pin shaft force sensor, a display screen and an alarm device, wherein the main controller comprises a single-chip microcomputer processor, an A/D (Analog to Digital) conversion circuit, an analog quantity input circuit, an R232 serial communication circuit, a CAN (Controller Area Network) communication interface and a switching quantity output module; the long angle sensor comprises an angle measuring module consisting of an MEMS (Micro-Electromechanical System) chip as well as a length measuring module consisting of a potentiometer and a circuit for converting resistance into an analog signal; the pin shaft force sensor has a pin-shaft-shaped double-shear-beam structure, and has the characteristics of unbalance loading resistance, torsion resistance, high accuracy and the like; the alarm device comprises an alarm circuit consisting of a relay, a buffer and a 24V direct-current power supply; the display screen comprises an R232 serial communication module. Compared with the commercially-available moment limiter, the ultralow-temperature-resistant crane moment limiter provided by the invention has the advantages of ultralow temperature resistance, compact structure of the main controller, high vibration impact resistance, high reliability and the like.

The invention provides a fabrication method of an array substrate mother board, the array substrate mother board and a detection method. The fabrication method of the array substrate mother board comprises the steps of depositing a first thin film on a substrate, wherein a gap exists between an edge of the first thin film and an edge of the substrate; and coating photoresist on the first thin film, performing exposure and developing so that the photoresist forms a first scale pattern, wherein the first scale pattern is flush with the edge of the substrate and covers the first thin film so that the distance between the edge of the first thin film and the edge of the substrate can be read by the first scale pattern. Compared with a method of manual measurement, the fabrication method has the advantages of relatively high measurement efficiency, time saving and labor saving; moreover, the precision of the first scale pattern formed by a photoetching process is microscale; and compared with existing millimeter-scale graduated scale, the measurement accuracy is relatively high, and the measurement deviation is relatively small.

A method of compensating for misalignment between an optical measurement instrument and a model eye includes: receiving a light beam from the model eye at the optical measurement instrument; producing image data, including light spot data for a plurality of light spots, from the received light beam; determining an observed location of a corneal reflex from the model eye within an image representing the image data; and determining an angle of misalignment between an axis normal to the front surface of the model eye and the optical axis of the optical measurement instrument from the observed location of the corneal reflex within the image.

The invention discloses an earthwork balance correction calculation method for a low-altitude oblique photogrammetry technology. According to the method, a low-altitude flight platform is adopted to carry an aerial photography sensor to collect ground image data of an earthwork balance area and scanned point cloud data; performing modeling processing on the point cloud data through three-dimensional modeling software, and importing the model into an EPS system to generate a triangulation network; meanwhile, adopting a measuring robot to carry out point extraction re-measurement on a characteristic area to form correction data, importing correction elevation value data into the EPS system to correct a triangulated network, and finally, setting a DEM (digital elevation model) after earthworkbalance in the EPS system according to design and construction requirements to serve as a digging and filling analysis basis. According to the method, the manual intervention is reduced, the workingefficiency is improved, the model scene reduction degree is high, the earthwork balance working data is restored to approach the field reality, and the method has high reference and guidance effects on the field construction.

The invention discloses a benchmarking test tool of multiple temperature sensors. The benchmarking test tool of multiple temperature sensors includes a shelf, a cover plate and a connecting rod, wherein the cover plate is arranged above the shelf and can shift up and down relative to the shelf so as to press down the multiple temperature sensors; the connecting rod penetrates through the shelf andthe cover plate; a plurality of mounting holes for mounting the temperature sensors are formed in the shelf; and two ends of the connecting rod are each equipped with a fastener for locking the shelfand the cover plate. The invention also discloses a benchmarking test method of multiple temperature sensors. The benchmarking test tool of multiple temperature sensors and the test method thereof can guarantee that the depth that probes of the multiple temperature sensors are immersed into a constant temperature working medium is consistent, enable the multiple temperature sensors to make real-time benchmarking tests in the same test conditions, can effectively eliminate the error caused by difference of conditions during the testing process, and can reduce the appeared measuring deviation during the steady state and dynamic measurement process so as to enable the benchmarking test results of the multiple temperature sensors to be more reliable and improve the reproducibility of repeatedtests.

The invention relates to the technical field of unmanned robot clusters, in particular to a dynamic positioning information fusion method for an underwater unmanned robot cluster. A concept of a consistency method under dynamic topology is introduced, a distributed unscented Kalman filtering method is combined, a local unscented filter and a weighted average consistency filter are embedded in each node of a communication network, and the local unscented filter utilizes local multi-source observation information of each AUV node to obtain a local unbiased estimator about the positioning state of the measured node; and meanwhile, the weighted average consistency filter carries out consistent fusion on all local posteriori estimations, so that a global posteriori estimation result is output in a mode that an information matrix weights a posteriori estimation mean value.

The invention discloses a three-channel attitude algorithm method of a linear array infrared earth sensor. The method comprises the steps that adjacent radiation data are judged at first to obtain an integer part of a through position, then a decimal part of the through position is calculated, a single-lens linear scanning calibration test is carried out, linear fitting is carried out on a linear movement locus, sine fitting and quadratic fitting are carried out on an error term to obtain a radiometric correction formula, and the through positions of all channels are corrected; an attitude angle zero position is obtained by obtaining a track zero position calibration table, and the corresponding mode is applied to any track or an unknown track to calculate an attitude angle. Under the background that the three-channel attitude algorithm method is applied to measurement of different track attitudes, on the basis of the algorithm improving linear array infrared earth sensor measuring precision, lowering measuring deviation and losing partitive accuracy, redundancy backup in the hardware level is achieved, and the on-track using reliability is improved; in the environment with no high precision requirement, the equipment size and weight can be reduced by reducing the number of lenses.

The invention discloses a locating device of an energy converter used for detecting the crack depth of a concrete member, wherein scales are marked at the side surface of a base ruler by taking 50mm as the minimum unit; a longitudinal slot (6) facilitating a connecting line of the energy converter to penetrate is arranged in the middle of the bottom surface of the base ruler; a first cursor sleeve (5) and a second cursor sleeve (2) that can slide freely are sheathed on the base ruler; the first cursor sleeve (5) and the second cursor sleeve (2) are respectively provided with a first fixing knob (3) and a second fixing knob (7) that are respectively used for fixing the first cursor sleeve (5) and the second cursor sleeve (2) on the base ruler; and the bottom surfaces of the first cursor sleeve (5) and the second cursor sleeve (2) are respectively provided with a mounting hole used for installing the energy converter. With the adoption of the locating device, the fast and accurate location for the energy converter in the crack depth detection site can be realized, thereby avoiding the trouble caused by the location by adopting a common steel ruler and a marking pen originally, saving the on-site operation time, improving the observation efficiency, improving the location accuracy and reducing the measured deviation.

The invention provides a novel underground non-standard high-pressure flowmeter which comprises a pipeline body; an inlet cylinder section, an inlet conical contraction section, a throat pipe, an outlet conical contraction section and an outlet cylinder section are arranged in the pipeline body, the right side of the inlet cylinder section is connected with the inlet conical contraction section, and the right side of the inlet conical contraction section is connected with the throat pipe. The right side of the throat pipe is connected with the outlet conical contraction section, the outlet conical contraction section is connected with the outlet cylinder section, the negative pressure tapping port is formed in the upper end of the throat pipe, the positive pressure tapping port is connected with the positive pressure tapping pipe; and a first pressure transmitter and a second pressure transmitter are arranged at a left end opening of the negative pressure tapping pipe and a left end opening of the positive pressure tapping pipe respectively. The first pressure transmitter and the second pressure transmitter are respectively connected with a flow display instrument, and a displayeris arranged on the outer surface of the flow display instrument. According to the invention, the measurement precision can be greatly improved, and accurate measurement can be carried out even under the condition of small differential pressure.