8results about How to "Realize precise measurement" patented technology

The invention relates to the technical field of size measurement, in particular to a method, a system and a device for precisely measuring the size of a tiny clock part. The method comprises the following steps: acquiring edge lines in surface images of the tiny clock part under different visual angles; in combination with gray distribution of pixel points on each edge line and pixel points in a neighborhood, obtaining an illumination artifact feature value of each edge line; obtaining the structural regularity of each edge line according to the difference between the gradient magnitudes of the pixel points on each edge line and the pixel points in the neighborhood, the relative position between the pixel points on each edge line and the adjacent pixel points and the illumination artifact feature value; and in combination with the difference and the relative position of the structure regularity between the adjacent pixel points in each edge line and the other edge lines, the real edge of the part is screened, the surface images of the tiny clock part under different visual angles are converted into a three-dimensional model, and then the size of the tiny clock part is determined. According to the invention, the accuracy of the size measurement result of the tiny clock part is improved.

The invention relates to a front-end conditioning circuit integrated packaging module for gravitational waves and a packaging method, belongs to the technical field of semiconductor packaging, integrates a front-end circuit, greatly reduces the circuit area, facilitates temperature control, and is beneficial to improving the temperature consistency of the front-end conditioning circuit. The front-end conditioning circuit is integrally packaged, so that electromagnetic interference protection of the circuit can be realized, the influence of cosmic radiation on the front-end analog circuit of the measurement system can be avoided when the space environment is used for measurement, and the anti-interference capability of the measurement system is greatly enhanced; the method is suitable for precise measurement of gravitational wave signals in satellite-borne and intense radiation application scenes.

The invention belongs to the technical field of human body impedance measurement, and particularly discloses a human body skin and subcutaneous tissue impedance measurement method and device and electronic equipment. The method comprises the following steps: step S101, acquiring impedance data of to-be-measured human body impedance under different excitation frequencies; step S102, based on the impedance data under different excitation frequencies, generating target curve data of the impedance data of the to-be-measured human body impedance along with the change of the excitation frequencies; step S103, fitting the target curve data by using a human body impedance model, and determining human body skin impedance and human body subcutaneous tissue impedance of the human body impedance to be measured; the human body impedance model is determined based on human body skin impedance and human body subcutaneous tissue impedance. According to the invention, precise measurement of impedance of human skin and subcutaneous tissue can be realized, the measurement precision and reliability are improved, and the richness and diversity of measurement data are increased.

This invention relates to a track inspection trolley for precision track measurement with automatic fine-tuning. It includes a track measurement trolley and automatic fine-tuning mechanisms mounted on both sides. An industrial computer mounted on the trolley's computer tray is equipped with host computer software. This software remotely controls an automatic total station via wireless communication, locking and tracking a precision measuring prism, dynamically and continuously measuring the prism's coordinates, and reading data from the trolley's tilt and gauge sensors. Simultaneously, it calculates the horizontal and vertical deviations of the track at the current mileage position and sends the deviation values ​​and directions to the automatic fine-tuning mechanisms mounted on both sides of the trolley. Based on the deviation values ​​and directions, the automatic fine-tuning mechanisms control a motor to rotate a sleeve, turning a fine-tuning screw to adjust the track's horizontal and vertical alignment to the designed position. This invention achieves precise measurement of the horizontal and vertical deviations of the left and right tracks and automatically completes the adjustment simultaneously, significantly improving track fine-tuning efficiency.

This invention discloses an integrated laser ranging and communication method based on baseband signal combining modulation: Step 1: On satellite A, a laser emitter generates laser light; Step 2: The power ratio of the communication signal to the pseudocode signal is set to P; Step 3: The communication signal and the pseudocode signal are input into a microwave combiner for combining, and then enter the MZM to obtain the modulated laser; Step 4: The modulated laser light enters an optical amplifier and is then emitted; Step 5: On satellite B, an optical antenna receives the signal light; a local oscillator laser generates a light wave; Step 6: The light wave and the signal light are mixed in a coherent receiving module to generate two orthogonal intermediate frequency signals; Step 7: The signal processing module performs carrier synchronization on the two orthogonal signals and sends them to the communication demodulation unit and the pseudocode acquisition and tracking unit. This invention achieves the goal of integrating precision measurement and laser communication with minimal impact on the signal-to-noise ratio of the communication link.

The invention belongs to the technical field of electronic sensing, and particularly discloses a current sensing device. The current sensing device comprises a first PCB type Rogowski coil, a second PCB type Rogowski coil and a third Rogowski coil, wherein the first PCB type Rogowski coil and the second PCB type Rogowski coil are stacked at intervals to form a tubular structure, and the third Rogowski coil is uniformly wound on the tubular structure; and the first PCB type Rogowski coil and the second PCB type Rogowski coil are connected in series according to a stacking sequence and then are connected in series with the third Rogowski coil. The third Rogowski coil and the PCB type coil are combined, and the PCB type coil serves as a winding framework of the third Rogowski coil, so that the induction signal of the Rogowski coil can be increased to the maximum extent in a limited space size, and the sensitivity of current sensing is improved.

The utility model discloses a pretightening force tool, and particularly relates to the technical field of motor nut pretightening force regulation and control, the pretightening force tool comprises a base, a regulation and control detection assembly is arranged on the base, the regulation and control detection assembly comprises an electric push rod arranged at the top of the base, and an electric push rod is arranged at the top of the electric push rod. According to the utility model, through the corresponding cooperative use of each structure, the mechanical adjustment and precise measurement of the pre-tightening force are realized, the problems of low precision and poor efficiency of the traditional manual operation are solved, and the coaxial arrangement of the pull and push dynamometer and the dial gauge ensures the accuracy of the measurement of the force value and the deformation amount.

The invention relates to the technical field of displacement measurement, and particularly provides a displacement measurement device, a displacement measurement method and a computer program product. The device comprises a transmitting unit and a detecting unit, the transmitting unit comprises a laser source and a first collimator which are connected based on a first optical fiber; the detection unit comprises a second collimator and a detector which are connected based on a second optical fiber; the laser source, the first collimator, the second collimator and the detector are located on the same optical axis. According to the device, a laser beam transmitted by a first optical fiber is converted into first collimated light based on a first collimator, the first collimated light is converted into second collimated light through a displacement unit to be measured, the second collimated light is coupled into a second optical fiber based on a second collimator, and the second collimated light transmitted by the second optical fiber and light energy of the second collimated light are detected based on a detector. The horizontal displacement amount of the displacement unit to be measured on a plane perpendicular to the optical axis direction can be obtained based on the light energy of the second collimated light, and displacement measurement is achieved.