905results about How to "Short measurement time" patented technology

An apparatus includes a plurality of sensor modules that are disposed at spacings with respect to one another, each sensor module having a local oscillator device. The oscillator device generates an oscillator signal that is passed on to a transmit/receive device, and the oscillator signal is radiated. The transmit/receive device is set up such that it can receive signals reflected from the object. A phase detection device is coupled at one input to the oscillator device and at a second input to the transmit/receive device. Based on the oscillator signal and the received reflected signals, the phase detection device determines a phase signal. A control and signal-processing device determines, based on the spacings of the sensor modules with respect to one another and the phase signals, a direction of the object with respect to the sensor module.

A hand-held measurement device for appearance analyses includes a measurement array which comprises a number of illumination means for applying illumination light to a measurement field in at least three illumination directions and a number of pick-up means for capturing the measurement light in at least one observation direction. The illumination directions and the observation directions lie in a common system plane. At least one pick-up means is embodied to spectrally gauge the measurement light in a locally integral way, and at least one imaging pick-up means is embodied to gauge the measurement light in terms of colour in a locally resolved way. The spectral pick-up means and the locally resolving pick-up means are arranged such that they receive the measurement light reflected by the measurement field under the same observation conditions and in particular from the same observation direction.

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.

The invention discloses a bracelet capable of collecting multi-parameter health indexes. The bracelet comprises a body and a wrist strap. The body comprises a shell body, a displaying screen, a power supply, a clock part and a main control system. The displaying screen, the power supply, the clock part and the main control system are arranged in the shell body. The main control system comprises a main printed board, a microprocessor, a storage, an analogue signal processing chip and a Bluetooth transmission device. The microprocessor, the storage, the analogue signal processing chip and the Bluetooth transmission device are arranged on the main printed board. An infrared temperature sensor, an alarming device, a gravitational acceleration sensor for step counting and a charging connector are arranged on the main printed board. A flexible connecting wire cable, a measuring printed board, a body surface temperature sensor, a photosensitive sensor and a light source are arranged on the wrist strap. The body surface temperature sensor, the photosensitive sensor and the light source are integrated on the measuring printed board. A tensioning device is arranged on the wrist strap. The bracelet is small and light, wearing and using are convenient, various health parameters can be monitored accurately, human body parameters are collected near the Neiguan point under a wrist of a palm side, the number of blood vessels under the wrist is large, pulsation is obvious, and accordingly the accuracy of data testing and obtaining through the bracelet is greatly improved.

A method of qualifying a diffraction grating comprises performing plural measurements by illuminating a region of the grating with a beam of measuring light and detecting an intensity of measuring light diffracted by the grating into a 0th diffraction order. A wavelength of the measuring light or a polarization of the measuring light or an angle of incidence of the measuring light onto the diffraction grating is varied between subsequent measurements. A shape parameter of diffracting elements forming the grating comprises a pitch, height or width of structural features of the diffracting elements. The shape parameter is advantageously used in analyzing interferometric measurements performed on optical surfaces during manufacture of optical elements of a high accuracy.

A lithium ion battery internal health feature extraction method based on an impedance spectrum, and relates to the new energy research field; an existing method uses an EIS to analyze and estimate a SOH, wherein the EIS is long in measuring time, and cannot realize online measurements; the lithium ion battery internal health feature extraction method comprises the following steps: building a lithium ion battery electrochemistry impedance spectrum mathematics model; fast measuring a lithium ion battery electrochemistry impedance spectrum, and obtaining the lithium ion battery electrochemistry impedance spectrum; using the lithium ion battery electrochemistry impedance spectrum mathematics model to identify the lithium ion battery electrochemistry impedance spectrum parameters respectively under high, medium and low frequency stages, thus obtaining the lithium ion battery model parameters; periodically measuring the electrochemistry impedance spectrum of the aged lithium ion battery, using the lithium ion battery electrochemistry impedance spectrum mathematics model to identify the lithium ion battery electrochemistry impedance spectrum parameters of the aged lithium ion battery, thus obtaining the model parameter changing rules in the lithium ion battery aging process, and serving as the features that evaluate the battery health states. The lithium ion battery internal health feature extraction method is used for evaluating the battery health states.

The invention discloses an ultrasound bone density measuring and analyzing system. The system comprises an ultrasound parameter measuring apparatus, a communication interface and a human machine interaction device, wherein the ultrasound parameter measuring apparatus comprises transmitting unit consisting of a pulse generator, a high-voltage pulse excitation module and a transmitting probe, an ultrasound receiving unit consisting of a receiving probe, a simulation pretreatment module, a gain adjustable amplifier, a phrase comparator, a high-speed ADC and an asynchronous FIFO, and a central processor, a power supply control module and a structural body. the human machine interaction device controls the ultrasound parameter measuring apparatus through the communication interface to measure the width of a calcaneus of a detected person, the transmission speed of an ultrasound wave in the calcaneus, broadband ultrasonic attenuation to calculate the bone intensity indexes and the bone density, so a medical report can be made according to diagnostic standards of osteoporosis and a special data base can be built for long term use. The system adopts wet or dry coupling and other technologies to improve the precision and accuracy of measure and has the advantages of easy carrying, low cost, no damage caused by radiation and can be use in long term monitoring of bone condition of the detected person.

The invention relates to a welding structure residual stress ultrasonic lossless measurement device and a method, in particular to a device and a method using ultrasonic for measuring the residual stress of a welding structure, belonging to the residual stress measurement field. The method aims at overcoming the problems of a traditional stress measurement method that work pieces are destroyed, time is consumed and the residual stress measurement can not be satisfied under the service condition of the welding structure. The two ends of a probe group of the invention are respectively connected with an impulse signal source and a signal receiving processing device which is connected with a display. And a microcontroller is embedded in the signal receiving processing device. In said method, the coordinate of a measured point is determined; the probe group emits impulse signals sent out from the impulse signal source into a work piece through a first critical refraction angle to generate critically refracted longitudinal waves, wherein, enveloping data are read by the signal receiving processing device and are discretized into digital signals and FIR filtering waves; total enveloping weight eigenvalue Mn is worked out; abnormal data are removed according to Brubbs criterion after one measured point is measured for a plurality of times, measuring position is changed for measuring again, and Mn and Mn+1 are worked out according to two measuring points to calculate the residual stress Delta of the work piece.

An endoscope-like image taking method of the present invention includes a preparation step of providing at least one peculiar index, which can be discriminated from other portions on an MR image, at the tip of a catheter, a first step (S1) of previously inserting a metal guide wire for guiding the catheter into a body cavity of a patient into which the catheter is inserted, a second step (S2) of inserting the catheter into the body cavity along the guide wire, a third step (S3) of executing an MR imaging sequence of a plurality of sliced images intersecting the guide wire, a fourth step (S4) of reconstructing three-dimensional image data based upon the nuclear magnetic resonance signals, which are generated from the patient when the sequence is executed and are received by the guide wire, and determining the tip position and the inserting direction of the catheter by detecting the peculiar index provided at the tip of the catheter based upon the three-dimensional image data, and a fifth step (S5) of reconstructing the center projected image using the three-dimensional image data and setting the tip position and the inserting direction of the catheter as a view point and a line-of-sight direction and displaying the center projected image on a display means, thereby an endoscope-like image, which is observed from the catheter in the body cavity of the patient, is taken and displayed in real time or semi-real time so that the insertion of the catheter is supported.

An imaging device for biochemical or medical samples, the pulse mode light source of which incorporates flash lamps and a rotating mirror in an inclined position, the said mirror reflecting the light emitted by each flash lamp in turn along the same optical path to the sample. The flash lamps are switched on alternately in phases and synchronised with the rotating mirror and the emission light chopper, which comprises two rotating discs. The turning mirror directs the light at the sample from above and/or below, in which case a double-acting transparent scattering plate can be used.

The invention discloses a method for measuring coal sample methane adsorbing capacity through low-field nuclear magnetic resonance. According to the method, selected measuring parameters are used for carrying out low-field nuclear magnetic resonance measurement on powder coal samples after methane adsorption balance under set pressure, the nuclear magnetism T2 spectrum of methane in the coal samples is obtained, then signal amplitude integrals of the first spectrum peak (in the range of 0.1-4ms spectrum) on the left of the T2 spectrum are substituted to a hydrogen content index reticle equation of methane under the standard condition built through an experiment, the standard condition size of methane adsorbed by the coal samples is obtained, and therefore the methane adsorbing capacity of unit mass of coal under the set pressure is obtained. According to the method, the scale relation of methane mass and nuclear magnetic resonance 1H nuclear signals is built, the quantitative assay of methane adsorbing capacity under the same temperature and different pressures is achieved, and the novel method can be used for measuring coal methane absorbing capacity in a real-time, home-position and dynamic mode.

A nucleic acid molecule is provided which is initially catalytically inactive but which can complex with a specific co-factor, e.g., a nucleic acid molecule or a non-nucleic acid molecule, to form a catalytically active nucleic acid molecule. The catalytically active nucleic acid molecule can be used to detect the presence of a non-nucleic acid co-factor or of a nucleic acid co-factor using the nucleic acid sequence of the present invention.

The invention relates to a method for measuring a liquid phase diffusion coefficient, and an apparatus thereof, and belongs to a method for measuring a diffusion coefficient of a liquid by adopting yellow light LED as a light source based on a capillary imaging method. According to the present invention, a transparent capillary is adopted to construct a liquid phase diffusion cell; the specific refractive index spatial resolution measurement capability of the capillary imaging method is adopted to directly observe and record the diffusion regularity of the thin layers of the diffusion medium in the capability, wherein the thin layers of the diffusion medium have the same refractive index; the liquid phase diffusion coefficient is calculated based on the Fick second law. With the present invention, the diffusion coefficient between glycerol and purified water is measured at a room temperature of 25 DEG C, with comparing the diffusion coefficient 0.720*10<-5> cm<2>/s reported by the literature of the traditional holographic interferometry method with the diffusion coefficient 0.715*10<-5> cm<2>/s measured by the method of the present invention, the relative error is 0.69%; the capillary is adopted to construct the liquid phase diffusion cell, such that the amount of the required sample is less, the measurement speed is rapid, the anti-interference capability is strong and the system stability is good.

The invention discloses a dynamic detecting device and an adjusting method for misalignment of a rotating machine. The dynamic detecting device comprises a control cabinet, a testing platform, a stepping motor and a base board, wherein the top surface of the testing platform is provided with a guiderail. The lower part of the base board is embedded on the guiderail through a chute. The base board can slide on the guiderail. The lower part of the base board is connected with a lead screw through a nut in a threaded connection manner. One end of the lead screw is connected with output shaft of the stepping motor. The adjusting method comprises the steps of (1) testing whether the rotating machine is complete; (2) adjusting an eddy current sensor to an appropriate position; (3) resetting the position of the base board; (4) acquiring a signal; (5) drawing an axis orbit; (6) determining the misalignment degree; (7) determining the misalignment type; (8) computing an adjusting amount in XZ; (9) computing the adjusting amount in XY; and (10) acquiring another point in an acquired signal and computing the adjusting amount. The dynamic detecting device has a beneficial effect of detecting the misalignment fault of rotating shafts with different shaft diameters.

The present invention belongs to the field of measurement technology, and relates to an improvement on calibration method for laser autocollimating angle-measuring system. It is characterized by that on the basis of laser autocollimating three-freedom dynamic angle measuring system said invention adopts the following steps: creating simplified calibration model of laser autocollimating angle measuring system, obtaining rating data pair, calibrating parameter of model and obtaining measurement model of system.