79results about How to "Improve measurement rate" patented technology

Systems and methods for noninvasive assessment of cardiac tissue properties and cardiac parameters using ultrasound techniques are disclosed. Determinations of myocardial tissue stiffness, tension, strain, strain rate, and the like, may be used to assess myocardial contractility, myocardial ischemia and infarction, ventricular filling and atrial pressures, and diastolic functions. Non-invasive systems in which acoustic techniques, such as ultrasound, are employed to acquire data relating to intrinsic tissue displacements are disclosed. Non-invasive systems in which ultrasound techniques are used to acoustically stimulate or palpate target cardiac tissue, or induce a response at a cardiac tissue site that relates to cardiac tissue properties and / or cardiac parameters are also disclosed.

Systems and methods for noninvasive assessment of cardiac tissue properties and cardiac parameters using ultrasound techniques are disclosed. Determinations of myocardial tissue stiffness, tension, strain, strain rate, and the like, may be used to assess myocardial contractility, myocardial ischemia and infarction, ventricular filling and atrial pressures, and diastolic functions. Non-invasive systems in which acoustic techniques, such as ultrasound, are employed to acquire data relating to intrinsic tissue displacements are disclosed. Non-invasive systems in which ultrasound techniques are used to acoustically stimulate or palpate target cardiac tissue, or induce a response at a cardiac tissue site that relates to cardiac tissue properties and / or cardiac parameters are also disclosed.

An optical sensing system uses light scattered from a sensing fibre to sense conditions along the fibre, and has a receiver with a frequency to amplitude converter to obtain a frequency of a Brillouin component of the received scattered light, to deduce the conditions. This converter can avoid time consuming scanning of frequencies to obtain the Brillouin frequency spectrum, and avoids the heavy processing load of deducing a peak or average frequency from the spectrum. The converter can be implemented in the optical domain using a grating or interferometer, or in the electrical domain using a diplexer or electrical interferometer. It can generate complementary signals, having opposite signs, a ratio of these signals representing the frequency. This can avoid sensitivity to amplitude changes in the received scattered signals and provide common mode rejection of noise.

The invention relates to a method for the taking of a large number of distance images comprising distance picture elements, wherein electromagnetic radiation is transmitted in each case in the form of transmission pulses using a plurality of transmitters arranged in an array for each distance image to be taken and reflected echo pulses are detected using a plurality of receivers arranged in an array, with the respective distances of objects at which the transmission pulses are reflected and forming a distance picture element being measured by determining the pulse time of flight, wherein a plurality of individual measurements are carried out using a time measuring device connected after the receiver array for each distance image to be taken, in which individual measurements a respective pulse chain is processed which includes a logical start pulse derived from the respective transmission pulse and at least one logical receiver pulse formed from an echo pulse or a noise pulse, wherein the logical receiver pulses are each generated by means of at least one reference of the receiver, the reference being broken through by the underlying echo pulses or noise pulses, with an exceeding of the reference forming the positive flank of the receiver pulse defining an up event and a falling below of the reference forming the negative flank of the receiver pulse defining a down event, wherein, for each distance image to be taken, the associated pulse chains are formed in that the start pulses and the associated receiver pulses are each combined at the right time, the pulse chains formed in this manner are distributed over an array of time measuring channels formed by the time measuring device in accordance with a pre-settable measurement procedure, and, for each time measuring channel, the time durations are determined which, in each case with reference to a point in time before the start pulse, pass until a receiver pulse in that, for each up event and / or for each down event, at least the respective clock pulses are counted which are made available by a central clock at a known frequency, and the counter results are stored as an event list in an arrangement taking account of their respective time information, and wherein the stored event lists of all time measuring channels are read out and evaluated in order to convert the respective time information contained in the event lists into distance values corresponding to the distance picture elements.

An optical sensing system uses light scattered from a sensing fibre to sense conditions along the fibre, and has a receiver with a frequency to amplitude converter to obtain a frequency of a Brillouin component of the received scattered light, to deduce the conditions. This converter can avoid time consuming scanning of frequencies to obtain the Brillouin frequency spectrum, and avoids the heavy processing load of deducing a peak or average frequency from the spectrum. The converter can be implemented in the optical domain using a grating or interferometer, or in the electrical domain using a diplexer or electrical interferometer. It can generate complementary signals, having opposite signs, a ratio of these signals representing the frequency. This can avoid sensitivity to amplitude changes in the received scattered signals and provide common mode rejection of noise.

A cavity ring-down spectrometer includes:a) multiple detectors for monitoring the intensity of the radiation emitted from the cavity and the wavelength of the radiation injected into the cavity;b) controllers which turn off the radiation into the cavity and precisely adjust the temperature of, and current to, the laser gain medium; andc) means for adjusting the beam path length of the optical cavit to bring the cavity into resonance with the injected radiation. Additionally, disclosed is a method for using the spectrometer to detect a target analyte.

An optical tomograph is equipped with: a light source unit for emitting a plurality of light beams, the wavelengths of which are swept within different predetermined wavelength bands respectively with the same period; light dividing means, for dividing each light beam into a measuring light beam and a reference light beam; combining means, for combining reflected light beams, which are the measuring light beams reflected by a measurement target when the measuring light beams are irradiated thereon, with the reference light beams; interference light detecting means, for detecting an interference light beam, which is formed by the reflected light beam and the reference light beam being combined by the combining means, for each of the light beams as an interference signal; and tomographic image processing means, for generating a tomographic image of the measurement target employing the plurality of interference signals detected by the interference light detecting means.

The analyte concentration, such as glucose, in a human or animal body is measured with an implantable sensor that generates measurement signals. The measurement signals are compressed through statistical techniques to produced compressed measurement data that can is easier to process and communicate. A base station carries the implantable sensor along with a signal processor, memory, and a transmitter. A display device is also disclosed that can receive the compressed measurement data from the base station for further processing and display.

A displacement measurement device has a detector area which is larger than the area of the beam spot reflected from the measurement surface. The detector area is made larger than the size of the beam spot on the detector area, in order to accommodate shifts in the location of the beam spot due to changes in the precise locations of the components of the displacement measurement device. The subset of pixels in the detector area having advantageous correlation characteristics, is then selected to perform the correlation calculation, thereby reducing data processing time requirements.

A radar transmits electromagnetic energy in pulse repetition intervals and receives reflections from objects in range gates including Doppler filters. The radar approves desirable ambiguous echoes and suppresses ambiguous echoes of no interest or that interfere with the radar's display. The radar frequency varies according to a staggered or wobbling pattern. The ambiguous echoes produce one pulse in the range gates within a predetermined number of periods. The Doppler filter works with an impulse function response that includes a small number of samples. The Doppler filter, during the predetermined number of periods, gives rise to independent samples from reflectors within the radar's unambiguous range. When the independent samples exceed the small number of samples, the radar approves the ambiguous echo. Otherwise, it is suppressed. In this way, ambiguous echoes are prevented from interfering with the reception or display of echoes. The suppression of asynchronous interferences can be made easier.

The present invention provides a method and a geodetic scanner for determining the appearance of a target. In the method and geodetic scanner of the present invention, an initial can is performed to calculate or determine a set of optimal gain values for each one of a number of predetermined positions (151-166) at the surface of the target (150). Once gain values (g151-g166) have been determined for all predetermined positions, distances to each one of the predetermined positions are calculated using the gain values. The present invention is advantageous in that the measurement rate and the overall efficiency are increased.

It is described a method for determining a mobility state of a user equipment within a cellular network system, the cellular network system comprising a plurality of cells. The method comprises performing, by the user equipment, measurements for a predefined time period for detecting cells being within a range of the user equipment, determining a number of cells being detected during the predefined time period, and determining the mobility state of the user equipment based on the number of cells, wherein the mobility state of the user equipment is indicative for a velocity of the user equipment relatively to the plurality of cells.

This device comprises a pulsed laser source (6), means (8, 10, 12) for focusing light from this source onto an object to be analysed (2) to produce plasma on the surface of the object, means (16, 18) of analyzing a plasma radiation spectrum, means (20) of determining the elementary composition of the object from this analysis, and possibly means (4) for displacing the object. The invention is particularly applicable to test radioactive materials.

A method for increasing the throughput, or the precision, or both the precision and the throughput, of a flow cytometer, or of a hematology analyzer employing a flow cytometer, and for further reducing the complexity of such a cytometer or analyzer, by utilizing the technique of laser rastering in combination with a lysis-free single-dilution method. Laser rastering involves sweeping a laser beam across a flowing sample stream in a hematology analyzer. A lysis-free single-dilution method involves performing all the flow cytometer measurements on a sample using a single aliquot, a single lysis-free reagent solution, a single dilution, and a single pass of said dilution through the measurement apparatus. An apparatus suitable for carrying out the method of this invention comprises an optical module comprising a source of light, a scanning device, a lens or system of lenses, a flowcell, detectors, and filters; and an electronic module comprising preamplifiers, analog signal conditioning elements, analog-to-digital converters, field-programmable gate arrays, digital signal processing elements, and data storage elements.

The invention discloses a method for measuring a material parameter and a material thickness by using a terahertz pulse. The method comprises the steps of measuring a reference signal and a sample signal; extracting the pth time of echo signal from the sample signal and obtaining an experiment value of a corresponding transmission coefficient; measuring a measurement value of a sample thickness L; building a main peak / echo transmission model; calculating a transmission coefficient calculation value corresponding to the pth echo signal; calculating a first material electromagnetic parameter and a second material electromagnetic parameter; calculating a total difference value function of the material parameter; if the total difference value function of the material parameter meets the preset conditions, taking the sample thickness corresponding to the total difference value function of the material parameter as an accurate thickness of the sample to obtain the calculation value of the transmission coefficient corresponding to a main peak corresponding to the sample thickness L; and calculating a real part and a virtual part of a corresponding sample complex refractive index. By using the above method, the material parameter of an optical thick sample can be accurately determined and the material parameter and thickness of a terahertz pulse period can be measured at the same time.

Translocation control for sensing by a nanopore, as well as methods and products related to the same, are provided. Such methods optimize duplex stability to provide high fill rate (of the hybridization sites) but do not prevent rapid dissociation required for high read rates, as well as controlling the translocation of a target molecule for sensing by a nanopore by use of a selective pulsed voltage. Products related to the same include a reporter construct comprising two or more phosphoramidites.

A displacement measurement device has a detector area which is larger than the area of the beam spot reflected from the measurement surface. The detector area is made larger than the size of the beam spot on the detector area, in order to accommodate shifts in the location of the beam spot due to changes in the precise locations of the components of the displacement measurement device. The subset of pixels in the detector area having advantageous correlation characteristics, is then selected to perform the correlation calculation, thereby reducing data processing time requirements.

The method involves transmitting an electromagnetic radiation e.g. laser light, to a target object and receiving the radiation dispersed back by the object and guided over a reference length. The radiation is converted into signals, where tuning characteristics and phase noise of the light are characterized in a reference interferometer. A distance of the object is determined from the signals and under the usage of the length. Independent claims are also included for the following: (1) a computer program product with program code for executing a method for measuring absolute distance of a target object (2) a device for executing a method for measuring absolute distance of a target object.

The invention discloses a device for measuring a settling ratio and an optimal settling ratio of sludge in a mechanical acceleration settling pond and a method for measuring the settling ratio and theoptimal settling ratio of sludge by using the device, wherein the device comprises a shell, a settling assembly, an interface observation assembly and a control assembly, and a cavity is arranged inthe shell; the settling assembly and the interface observation assembly are arranged in the cavity in the shell; the settling assembly comprises two settling pipes which are connected in series, the volume of a first settling pipe is larger than or equal to the volume of a second settling pipe, the first settling pipe communicates with the second settling pipe through a connecting pipe, and the settled and concentrated sludge liquid in the first settling pipe is injected into the second settling pipe. The device of the invention is a portable device with simple structure, small size and compactness, is automatically controlled, is capable of obtaining the settling ratio and the optimal settling ratio of the sludge in the sludge liquid, overcomes artificial subjective factors, has accuratedata measurement, can automatically sample and analyze settling characteristics of the sludge, and provides guidance parameters for tap water treatment operation.

A system based on the continuous measurement (20) of the diameter of a cylindrical object (1) moving, laid down, on a belt conveyor (10) allows dimensional compliance of the latter object to be checked.The measurement system (20) may be coupled with a sorting system based on ejection out of the conveyor (10) by projecting a gas through a transverse nozzle (42).By means of the system according to the invention, it is possible to continuously determine whether a nuclear fuel pellet (1), in particular after rectification (2), has to be rejected or not.

This device comprises a pulsed laser source (6), means (8, 10, 12) for focusing light from this source onto an object to be analysed (2) to produce plasma on the surface of the object, means (16, 18) of analysing a plasma radiation spectrum, means (20) of determining the elementary composition of the object from this analysis, and possibly means (4) for displacing the object. The invention is particularly applicable to test radioactive materials.

In a method for regulating the power supply of a plurality of field devices S1, S2, S3, A1, A2, connected to a data bus DBL and supplied with electrical current over the data bus DBL, the electrical current requirements of the individual field devices S1, S2, S3, A1, A2 are determined, and the electrical current consumptions of the field devices S1, S2, S3, A1, A2 are adjusted by means of corresponding control signals. In this way, the electrical current consumption of individual field devices S1, S2, S3, A1, A2 can be centrally adjusted and therewith the process conditions matched.

The invention discloses a method for improving frequency measuring precision of a larmor signal of an Overhauser magnetometer and a circuit thereof. The circuit comprises an Overhauser sensor, a working substance exciting circuit, a conditioning circuit, an ADC (Analog Digital Converter), an FPGA (Field Programmable Gate Array), a data memory SDRAM (Synchronous Dynamic Random Access Memory) and an embedded controller. The measurement of the frequency of the larmor signal is converted into a frequency domain from a conventional time domain; frequency measurement is realized by using a method combined by an FFT (Fast Fourier Transform) algorithm and a CZT (Chirp Z Transform) algorithm: a rough frequency value of a current signal is obtained by using the FFT algorithm, and local narrowband spectrum zooming is performed by using the CZT algorithm in a narrowband range with the rough value as a central point so as to realize high-precision frequency measurement; the inherent defect of shaping error which occurs when a signal index is attenuated to the later stage in the existing hardware frequency measurement scheme is overcome, new error is not introduced, the frequency measuring precision of the magnetometer is improved to 0.001Hz, and the integral measuring speed of the instrument is improved while the frequency measuring effective time is increased; the upgrading of the frequency measuring scheme in the later stage is convenient, and the reconstruction cost of the instrument is effectively reduced.

A distance measuring device includes a light source emitting light, and an integrated electro-optic modulator arranged such that the emitted light passes through an optical waveguide of the electro-optic modulator in a first direction before being emitted from the distance measuring device, and after being reflected from a target passes through the electro-optic modulator in a second direction which is opposite to the first direction. The forward electro-optic response of a modulating region of the electro-optic modulator is the same as the backward electro-optic response, and a center of gravity of the modulation is independent of modulation frequency.

The invention discloses a static smoothness detecting system and a static smoothness detecting method of a railway. The static smoothness detecting system of the railway comprises a client, a laser tracker and a rail detection trolley, wherein the client is communicated with the laser tracker in a wired manner, the client and the rail detection trolley are respectively connected with a wireless communication module, the rail detection trolley comprises a single chip, a displacement sensor, an inclined angle sensor and a target sphere, the displacement sensor is arranged inside a framework of the rail detection trolley, a measurement magnetic ring of the displacement sensor is linked with a moving end of the rail detection trolley, an X axis of the inclined angle sensor is parallel to a cross beam of the rail detection trolley, data measured by the displacement sensor and data measured by the inclined angle sensor are integrated onto the single chip by means of a serial mode, the target sphere is mounted on the rail detection trolley, and the client is communicated with the single chip through the wireless communication module. According to the static smoothness detecting system and the static smoothness detecting method of the railway disclosed by the invention, railway detection efficiency can be increased effectively.

The invention discloses a method for measuring threshold voltage of an MOSFET. The method comprises the following steps: step 1, short-circuiting a gate and a drain of the MOSFET, injecting drain current into the drain, and measuring source and drain voltage as initial threshold voltage; step 2, setting a gate voltage measurement range according to the initial threshold voltage; step 3, measuringa static transfer characteristic curve of a linear working region of the MOSFET within the gate voltage measurement range; and step 4, obtaining a maximum transconductance value from the static transfer characteristic curve and linearly extrapolating to form final threshold voltage. By adoption of the method disclosed by the invention, the measurement rate can be improved without affecting or improving the measurement accuracy, and fast and accurate measurement can be achieved.