33results about How to "Improve accurate measurements" patented technology

An apparatus for measuring the thickness of a unit cell according to the present invention is characterized by comprising: a plurality of transfer rollers which sequentially transfer unit cells and are arranged to be spaced apart from each other; and a thickness sensor at a fixed location which irradiates light in the path in which the unit cells move and calculates a time of the received light so as to measure a thickness of the unit cells. A method for measuring the thickness of a unit cell according to the present invention is characterized by comprising: a unit cell transfer step (S1) of transferring unit cells through a plurality of transfer rollers arranged to be spaced apart from each other; a distance measuring step (S2) of irradiating light on the upper surface of the unit cells through an upper thickness sensor, irradiating light on the lower surface of the unit cells through a lower thickness sensor, and calculating a light receiving time of the light so as to measure the distance between the upper thickness sensor and the upper surface of the unit cells and the distance between the lower thickness sensor and the lower surface of the unit cells, respectively; and a thickness calculation step (S3) of subtracting a distance measurement value between the upper thickness sensor and the upper surface of the unit cells and a distance measurement value between the lower thickness sensor and the lower surface of the unit cells, from a distance between the upper thickness sensor and the lower thickness sensor, so as to calculate a thickness of the unit cells.

The invention relates to a driving mechanism of an omnidirectional mobile robot. The existing driving mechanism has low degree of freedom. A substrate is provided with a rotation driving motor; the rotation driving motor drives a driving rotation measuring wheel and a driving rotation driving wheel; a coder is installed below the driving rotation driving wheel; the driving rotation driving wheel is connected with a driven rotation driving wheel through a rotation driving belt; the driven rotation driving wheel is installed in a bearing between an upper cover and a lower cover; the rotation driving wheel drives a rotation axis; the bottom of the rotation axis is fixedly connected with a wheel bracket; the wheel bracket is internally provided with a rolling wheel; and the up-and-down movement of the wheel bracket is finished by the combined action of a damping spring and the rotation axis. The rolling wheel has three degrees of freedom, and the adaptability to landforms is increased on rough terrain.

The invention discloses a three-level calibration method for DC weak signals of a formation water resistivity logging instrument, which is characterized in that it includes instrument-level calibration, channel-level calibration and real-time period-level calibration; the instrument-level calibration is an instrument using an analog box calibration The constant DC power supply, the performance of the entire analog channel and the function of the digital channel; the channel-level scale is the use of a scale device to scale the performance of the entire analog channel and the function of the digital channel; the real-time cycle-level scale is transmitted through the DAC according to a predetermined timing A series of fixed positive and negative voltage values, control the scale relay to send the signal to the measurement channel, amplify and process through n different pre-amplification channels, and then after multi-channel gating switching and filtering, the ADC will collect according to the preset timing . The invention improves the accuracy of the formation water resistivity logging instrument for signal measurement and collection, and also improves the adaptability of the instrument to different well conditions.

The invention provides load balance measurement and a measurement device. The load balance measurement comprises a rigid load adder, a first load, a second load, an inertial reference system, a system balance force, and a force sensing element, wherein the rigid load adder is used for adding and transferring a rigid body or a non-absolute rigid body with acting effects by the load; the inertial reference system enables the rigid load adder to be kept still in relative to the inertial reference system; the system balance force is provided to the rigid load adder by the inertial reference system for an acting force for enabling the rigid load adder to be kept still in relative to the inertial reference system; the force sensing element is used for adopting a contact or non-contact mode to execute measurement on a positive direction value of a single component acting force, a negative direction value of the single component acting force or two direction force values or force value changes; acting effects by the first load, the second load and the system balance force on the rigid load adder are added by the rigid load adder; and the system balance force provided by the inertial reference system for the rigid load adder is measured by the force sensing element.

The invention provides a determination method of tin content in drugs. The determination method includes the following steps: (1) preparing a test solution; (2) preparing a reference solution; (3) performing chromatographic condition and system suitability test: adopting high performance liquid chromatography, taking octadecylsilane chemically bonded silica as a filling agent, phosphate solution 5-8g / L in concentration as a mobile phase A containing 2.8g / L-3.5g / L ion pair reagent and 0.7g / L-1.1g / L metal complexing agent and chromatographic pure methanol as a mobile phase B, performing elution according to the volume ratio of the mobile phase A to the mobile phase B being 78-92:22-8; controlling the flow velocity of the mobile phase to be 0.8mL / min-1.2mL / min; controlling the column temperature to be 20-30 DEG C; controlling detection wavelength to be 248nm-252nm; measuring and calculating results. By the determination method, the problem that the tin content determination method in the prior art is inaccurate, complicated in steps and the like is solved.

The invention discloses an FPGA accelerator. The FPGA accelerator uses an FPGA-based accelerator to realize the unloading and acceleration of a network test protocol in the FPGA, and the sending and receiving of task data does not need to be transmitted to a CPU for processing, thereby reducing the load of the CPU; the FPGA accelerator Its own data processing ability is strong, it can meet the test requirements of full bandwidth, and realize high-precision measurement; at the same time, the application module in this device is built based on the Iperf protocol, and the Iperf protocol can be replaced based on the test needs, and the scalability is good; due to the dynamic flexibility of the FPGA accelerator Programming features, the corresponding test environment can be built at any time as needed, all operations are just the execution of software instructions, no need to replace the hardware board, change the hardware connection relationship, which is conducive to the rapid location of faults. The invention also discloses a network parameter measurement system, method and readable storage medium, which have corresponding technical effects.

The invention discloses a digital phase shift method reactive power measurement frequency error compensation method under fixed-frequency sampling; the frequency error compensation method comprises the following steps: building an angle error compensation parameter list and a ratio error compensation parameter list; calculating translation points corresponding to digital phase shift according to real frequency measured values, and index values of compensated angle errors and ratio errors in the compensation parameter lists; obtaining compensation values from the parameter lists according to the index values, and combining with the translation points so as to calculate the reactive power, thus measuring and compensating reactive power. A normal digital phase shift method is added with the angle error and ratio error real time correction functions, thus always keeping the digital phase shift to reach accurate 90 degrees even under the fixed frequency sampling and changing frequencies, and realizing highly accurate measurement of the reactive power; the method can effectively solve the problems that the normal digital phase shift method is large in errors when measuring the reactive power frequency influence amount under fixed frequency sampling; the digital phase shift method reactive power measurement frequency error compensation method is high in reactive measuring precision, and not affected by the frequency fluctuations.

The invention belongs to the technical field of atomic measurement, and discloses a calibration device for weak field measurement of Hall magnetometer based on spin noise spectrum, comprising: a detection light source, the first detection light output by the detection light source passes through the first half After the wave plate, the first polarizer and the lens, it enters the atomic gas chamber along the X direction, and then is detected by the first balance detector after passing through the second half-wave plate and the first Wollaston prism; the atomic gas chamber is set In the magnetic shielding cylinder, the first Helmholtz coil for providing a magnetic field along the Y direction is arranged in the magnetic shielding cylinder; the output ends of the first balance detector are respectively connected to the first fast Fourier transform dynamic signal Analyzer; the first fast Fourier transform dynamic signal analyzer is used to analyze the detection signal to obtain the corresponding Larmor precession frequency. The invention can realize the calibration of the Hall magnetometer and can be widely used in the field of magnetometer calibration.

The invention discloses a weak oscillation monitoring optical fiber sensor which comprises a light source input device and a light source output device corresponding to the light source input device, wherein the downsides and upsides of the light source input device and the light source output device are connected through fixed supports, and the fixed support above or below the light source input device and the light source output device is also connected with a vibration induction membrane; two adjacent longitudinal side surfaces of the light source input device and the light source output device are respectively provided with a lens; and a light separating plate is arranged between the lenses of the light source input device and the light source output device, and is provided with a light transmitting hole for enabling a light source to be transmitted into the light source output device from the light source input device. The invention also discloses a sensor system formed by the weak oscillation monitoring optical fiber sensor and an application method of the sensor system. The invention solves the problems of low measurement accuracy and sensitivity as well as narrow measurement range of the traditional oscillation optical fiber sensor in the prior art.