250 results about "Measurement reliability" patented technology

The invention discloses a multifunctional flexible touch sensor. The flexible touch sensor is characterized in that a flexible polyimide circuit board is used as a substrate; a three-dimensional force sensing unit array and a temperature sensing unit array are respectively arranged on the substrate; three-dimensional force sensing units in the three-dimensional force sensing unit array and temperature sensing units in the temperature sensing unit array are arranged at intervals; and the surface height of each temperature sensing unit is lower than the surface height of each three-dimensional force sensing unit, thereby forming the integral concave-convex distribution form. The full-flexibility multifunctional touch sensor disclosed by the invention has the advantages of excellent surface adaptability, high three-dimensional force measurement reliability, small cross interference of mechanics and temperature information.

The invention provides a space division multiplexing Mach-Zehnder cascade fiber interferometer and a measurement method thereof. The space division multiplexing Mach-Zehnder cascade fiber interferometer is composed of a wide-spectrum light source, a photodetector, a coupler, a single-mode connection optical fiber, an optical fiber sensor, a continuous-variable optical delay device, and a reflector, wherein the optical fiber sensor is composed of a Mach-Zehnder interferometer and forms a cascade optical fiber sensor array or a network. The wide-spectrum light source and a photodetector are connected with the optical fiber sensor through the coupler to form a sensor network; and the sensor network is connected with the continuous-variable optical delay device and the reflector through the coupler and is used for enquiring and demodulating the optical fiber sensor. The space division multiplexing Mach-Zehnder cascade fiber interferometer solves the problem of breakage of the optical fiber sensor array, improves the anti-damage characteristics of the optical fiber sensor array and the network and solves the temperature compensation problem in the measurement process. The space division multiplexing Mach-Zehnder cascade fiber interferometer has the advantages of simple interferometer structure, easy implementation, improved measurement reliability and low cost, and better facilitates the technology generalization and popularization.

The invention provides an automatic flatness measuring machine which at least comprises a base, a support frame, a transmission guide system, a clamp system, a measuring system and a movement control system. The base is horizontally disposed on the ground, the support frame is vertically fixed on the base, and the transmission guide system is fixed on the base; the clamp system comprises a platform base board and an elastic clamping mechanism; the measuring system comprises a digital dial indicator, a single-chip microcomputer A and a computer, wherein the digital dial indicator is mounted on a sliding block of a Y-axis ball screw; and the movement control system comprises an upper computer, a single-chip microcomputer B, a drive, a proximity switch and a stepping motor. According to the automatic flatness measuring machine, the deflection of a detection object is detected, processed, stored and analyzed through a computer automation technology, the machine has great significance in reduction of labor costs, improvement of production efficiency and measurement reliability and the like, and the measuring machine is high in portability.

The invention discloses a coherent wind measurement laser radar system with adjustable range resolution. In one aspect, the system employs a polarization circular beam splitter 3, locks vertical polarized light in a circular device, and repeatedly passes through AOM to allow emitted laser to generate n upsilon M frequency shift, thereby adjusting laser frequency shift; in another aspect, the system employs EOM 5 to cooperate with the polarization circular beam splitter 3, converts the polarization state of the laser in the circular device reaching preset offset into parallel vibration from vertical polarization, and converts continuous wave laser into pulse width adjustable pulsed light, thereby realizing the adjustment of the range resolution of a coherent wind measurement laser radar. The scheme not only improves the applicability of the coherent wind measurement laser radar on different resolution requirement occasions and under different weather, but also improves the data measurement reliability of the coherent wind measurement laser radar.

The invention provides an end executor used for high-precision drilling and dimpling of a robot. The end executor comprises a spindle, a feeding unit of the spindle, a normal measuring device, a driving unit of the normal measuring device, a datum hole visual positioning unit and a guide rail installation plate. The spindle and the feeding unit of the spindle are installed on the guide rail installation plate. The normal measuring device is installed at one end of the guide rail installation plate. The datum hole visual positioning unit is installed on the back side of the guide rail installation plate. The end executor is compact in structure and comprises a plurality of function modules including a displacement detection module, a normal measuring module and a datum hole visual positioning module, and the measurement reliability is improved. The displacement detection module can detect the tool feeding amount and deformation amount of a workpiece when the workpiece is clamped and machined, and compensate for the deformation amount. The normal measuring device is small in size, multifunctional and high in measurement precision. The end executor is installed on an end flange plateof the industrial robot, and the drilling perpendicularity can be guaranteed.

There is provided an apparatus for measuring a blood sugar by using a microwave without withdrawing any blood while enhancing the reliability of measurement. The apparatus for measuring the blood sugar according to the present invention has a main body having a measurement surface configured to contact a measurement portion of a user, a probe part having a contact member exposed on the measurement surface so as to be in contact with the measurement portion, the probe part further having a probe disposed under the contact member for irradiating and receiving a microwave, a blood sugar measuring unit for supplying the microwave to the probe and measuring a blood sugar value from the received microwave, and a securing unit mounted on the main body for securing the measurement portion to the measurement surface.

The present invention is directed to a real-time automated video cognizer that functions as a facial video processor for detecting drowsiness in operators of motorized vehicles, including the use of a video cognizer to provide pattern recognition and control signal generation during monitoring of macroscopic or microscopic biological processes. More specifically, the present invention accepts input from a video monitoring system that continuously captures the operator's facial images; employing three sequential means of processing the digitized video information to extract the position and configuration of drowsy-relevant facial features and numerically processes this information to yield a quantitative estimate of drowsiness probability in each epoch of monitoring. The means of the present invention are noninvasive, do not restrict driver movement or performance, provide increased measurement reliability for actual driver behavior, and include the capability of generating or triggering suitable alarms when drowsiness occurs.

The present invention discloses a specialized device for measuring the resistance of a superconducting line joint, comprising a low temperature Dewar unit, a room temperature tube unit, a background magnet unit, an excitation magnet unit, a linkage frame unit, a weakening magnetic field measuring unit, etc. The specialized device has the advantages that only the room temperature tube is required to be moved out from the low temperature Dewar via a guide rail when a sample loop of the measured superconducting line joint is replaced, so that the volatilization amount of the liquid helium in an experimental process is reduced. The background magnet is positioned on the lateral side of a Hall element which measures the weakening magnetic field of the sample loop of the superconducting line joint. Compared with being positioned at the lower side of the Hall element, the background magnet positioned at the lateral side of the Hall element reduces the influence of the background magnet to the fact that the Hall element measures the weakening magnetic field generated by the sample loop of the superconducting joint. With the room temperature tube technical, the Hall element is arranged inside the room temperature tube, namely a normal temperature Hall sensor measures the weakening magnetic field of the sample loop of the superconducting joint. The cost of the device is reduced and the reliability of the measurement is improved.

The digital detection method of large-scale skin based on laser tracker firstly processes the MBD digital model of skin part with CATIA software, generates detection features, and sets feature measurement points to represent the measurement parameters on the extracted detection features; and then positioning and fixing the skin part on the fixing flat table; measuring the data of skin parts by using the testing system, analyzing software compares the measured data with the theoretical data, and then fits them to establish the functional relationship between the measured data and the theoretical data, and constructs the measuring coordinate system. Then through the detection system, according to the measurement planning document, complete the measurement data collection work of the detection project one by one; The data processing software fits and compares the measured data with the theoretical mathematical model to obtain the analysis results, and displays the product quality characteristics in the form of three-dimensional features and outputs the detection report, which effectively improves the measurement reliability and detection efficiency, and provides data for process optimization.

The invention discloses an ultra-low frequency high-accuracy micro-vibration measuring system which is composed of a base, four adapter blocks, four strain-type force sensors, a load disc, a dynamic strain indicator, 48 strain gages and a data collecting and processing system. The strain gages are pasted on the strain-type force sensors. The strain-type force sensors are located between the load disc and the adapter blocks and are connected between the load disc and the adapter blocks in a tightened mode through bolts. The adapter blocks are located on the side surface of the base and connected with the side surface of the base in a tightened mode through bolts. Three dynamic forces and three dynamic force moments of a disturbance source are measured through the fact that the strain gages pasted on the strain-type force sensors are reasonably combined and connected with the dynamic strain indicator to form 12 full bridge circuits. The disturbance source can be installed inside the measuring system and can also be installed outside the measuring system. The strain gages are connected with the dynamic strain indicator through wires. The dynamic strain indicator is connected with the data collecting and processing system through a wire. The ultra-low frequency high-accuracy micro-vibration measuring system can accurately measure the vibratory force and the vibratory force moment of a tiny disturbance source, the measured frequency range is accurate to 0Hz, and the measuring reliability is high.

The invention provides an object size measurement method and system and an intelligent terminal. The object size measurement method comprises the following steps that the measurement mode of a camera is initialized; the camera photographs an object to be measured and forms an image in the measurement area on a screen; meanwhile, a reference object arranged in the same measurement plane with the object to be measured is also photographed, and an image is formed in the reference area on the screen; the first pixel value of the object to the measured is obtained according to the screen resolution of the intelligent terminal and the length of the image of the object to be measured in a measurement direction, and a second pixel value occupied by the reference object is obtained according to the screen resolution of the intelligent terminal and the length of the image of the reference object in the measurement direction; and the size of the object to be measured is calculated according to the obtained first pixel value, the second pixel value and the size of the reference object. According to the object size measurement method and system and the intelligent terminal, the size of the object can be more conveniently and rapidly measured, and measurement reliability and accuracy are high.

The invention discloses a multipoint dispersive accumulative alpha energy spectrum soil radon-measuring method, which comprises the following steps: A. a measuring point is selected, and a data acquisition unit is buried into the soil of the measuring point; B. after radon gas in the soil is dispersed into a radon gas acquisition chamber of the data acquisition unit, the data acquisition unit is started; C. the data acquisition unit accumulatively collects and measures radon of the measuring point and alpha radiators in daughters of the radon, and then transmits measuring data to an on-scene data management module; D. the on-scene data management module performs statistic analysis on the measuring data, and then transmits the measuring data to a computer analysis module; and E. the computer analysis module further analyzes the data. The method can overcome the defects of the prior soil radon-measuring method, can solve the problems of low measuring efficiency, measuring precision, measuring accuracy and measuring reliability of the soil radon, and can realize qualitative measurement on the radon and daughter nuclide of the radon, thereby being capable of meeting the active demand of the prior geological exploration field and the prior environmental evaluation field on measurement of the soil radon.

The invention provides an aerodynamic parameter measurement method for an aircraft, which is used for measuring key data in three aspects of an airflow angle, dynamic pressure and an aerodynamic force. The method comprises the following steps: the airflow angle is calculated, the airflow angle is acquired through an embedded atmospheric data sensing system or a trajectory reconstruction mode, andthe above two modes are in mutual backup; the dynamic pressure is calculated, data are outputted according to pressure sensors configured by the embedded atmospheric data sensing system on the aircraft, the dynamic pressure is calculated and input is provided for calculating an aerodynamic coefficient; and the aerodynamic coefficient is calculated, the output is measured by using accelerometers, the aerodynamic force, that is, the lift force and the drag force, is calculated, and in combination of the dynamic pressure data, an aerodynamic calculation formula is used to directly determine the lift force coefficient and the drag force coefficient of the aircraft. The embedded atmospheric data sensing system is equipped with two sets of pressure sensors and multiple sets of accelerometers andgyroscopes. A hardware redundancy design and an algorithm redundancy design are adopted, and the aerodynamic parameter measurement reliability is improved.

The invention discloses a method for controlling the amount of coal conveyed into a furnace of a thermal generator set on the basis of virtual fuel quantity. The method includes the steps that (1) a fuel quantity instruction signal is formed through a unit load instruction and a boiler main steam pressure deviation signal, (2) virtual fuel quantity represented by capacity air door openness and coal mill inlet primary air pressure is obtained through coal mill capacity air door openness and a coal mill inlet primary air pressure signal, (3) by means of a PID arithmetic device, deviation signals of a fuel quantity instruction and a virtual fuel quantity are dynamically modified, the capacity air door openness is adjusted, and the quantity of fuel entering a hearth is adjusted. The virtual quantity of the fuel entering the hearth is obtained by means of the coal mill capacity air door openness and the coal mill inlet primary air pressure through functional operation and multiplication, the problems that a coordination system of a double-inlet double-outlet powder grinding system thermal generator set is poor in capacity air amount measurement reliability, and accordingly fluctuation of set operation parameters is large and even the coordination system can not be put into operation are solved, and stability and safety of operation of the set are improved.

A method and apparatus for noninvasive glucose measurement measures glucose indirectly from the natural response of tissue to variations in analyte concentration. The indirect measurement method utilizes factors affected by or correlated with the concentration of glucose, such as refractive index, electrolyte distribution or tissue scattering. Measurement reliability is greatly improved by stabilizing optical properties of the tissue at the measurement site, thus blood perfusion rates at the sample site are regulated. Perfusion is monitored and stabilized by spectroscopically measuring a control parameter, such as skin temperature, that directly affects perfusion. The control parameter is maintained in a range about a set point, thus stabilizing perfusion. Skin temperature is controlled using a variety of means, including the use of active heating and cooling elements, passive devices, such as thermal wraps, and through the use of a heated coupling medium having favorable heat transfer properties.

The invention discloses an online fault diagnosis method and system for a centrifugal pump. According to the method, a vibration sensor is utilized for measuring a radial vibration signal in the operating process of a pump; the radial vibration signal is transmitted to a signal processing module; analysis treatment is conducted based on the cyclostationary theory so that a cyclic autocorrelation function can be obtained and subjected to slice analysis; feature parameters for distinguishing whether the pump breaks down or not and recognizing the breakdown type after it is determined that the pump breaks down are obtained; and a relevant breakdown diagnosis result is obtained by performing comparison and analysis on the feature parameters and corresponding parameters generated when the pump runs normally under the design working condition. According to the online fault diagnosis method and system for the centrifugal pump, diagnosis on mechanical seal damage and cavitation failures can be achieved by measuring the radial vibration signal of the pump, the running feature information of the pump can be reflected in the vibration signal in real time, the information integration degree is high, the number of signal transfer paths is small, the anti-jamming capability is high, and measurement reliability is high; and by analyzing stable components in the cyclic autocorrelation function of the signal, the situation that running is unstable due to the bias condition and consequently signal analysis is disturbed can be avoided, and specific reasons which cause unstable flowing of the centrifugal pump are identified.

The invention relates to a wearable obstacle avoiding method and device based on an enhanced binocular image sensor and a 3D millimeter wave radar, which belongs to the field of wearable devices. Themethod comprises the steps that 1 the 3D millimeter wave radar and the enhanced binocular image sensor are used to collect the data of the distance, velocity and azimuth of an obstacle; 2 the information collected by the 3D millimeter wave radar and the image sensor are fused; and 3 the fused information of the distance, velocity and azimuth of the obstacle is informed to a device wearer through the information interaction method of sound encoding. The device comprises the image sensor, a radar sensor, an information fusion module and an information interaction module. According to the invention, the method fuses the information of the 3D millimeter wave radar and the enhanced binocular image sensor; the measurement reliability is improved; and the method and device can better help peoplewith vision disabilities to avoid existing obstacles.

Systems, methods, and apparatus for synchronizing timing in devices coupled to a data communication link are disclosed. In one example, a first device programs a future system time value in a second device. The first device launches a low-latency trigger signal that causes the future system time value to be loaded into a timer of the second device when a timer of the first device matches the future system time value. The second device measures phase difference between the trigger signal and edges of a clock signal used for timing in the second device. The phase difference is measured using an oversampling clock that provides a desired measurement reliability. The measured phase difference permits the first device to accurately determine system time as applied to the second device. The trigger signal can be provided on existing pins used by first and second devices in accordance with communication protocols and specifications.

A chip with measuring reliability and a method thereof are provided. The present invention serially connects a resistor having a resistance equal to or a little more than a maximum resistance of the chip itself to the resistor R_s of the chip so as to compensate the resistance differences among chips. A noise to signal (N/S) ratio of the chip is decreased, and a measuring reliability of the chip is improved.

A manufacturing method of measuring key size of scanning electronic microscope (CDSEM) calibration sample includes pre-cleanout of silicon underlay, forming underlay oxidizing layer, accumulating multi crystal silicon layer, forming photosensitive resist pattern, forming gate structure, forming a conducting layer. Gate structure sample gained restrains the aggradation of hydrocarbon induced by cumulation of surface charge for the abreaction effect of conducting layer, so the phenomenon of overloading of CD grown is eliminated to make service life of the calibration sample prolong apparently and guarantee the reliability of test of CDSEM.