34results about How to "Eliminate precision errors" patented technology

The invention relates to an automatic positioning cuttings accumulating box of a slicing machine. The box comprises a support, a box body and a positioning device. The positioning device comprises a clamping rod supporting box, clamping rods, a positioning block, limiting springs and a limiting element. Limiting holes corresponding to positioning holes are formed in the left side face and the right side face of the clamping rod supporting box, and the left side face is opposite to the right side face. The number of the clamping rods is two. The limiting element comprises a limiting rod and a return spring. One end of the limiting rod is provided with a wedge block, the other end of the limiting rod is provided with a cap-shaped pressing head, and the middle of the limiting rod is provided with a limiting block capable of sliding on the limiting rod. The portion, between the cap-shaped pressing head and the limiting block, of the limiting rod located is sleeved with the return spring. By means of the automatic positioning cuttings accumulating box, automatic positioning can be achieved. The limiting springs on the clamping rods can automatically compensate for axial displacement to guarantee that clamping is not loosened. The positioning structure is simple, and cutting precision and stability are guaranteed. The pressing head is pushed downwards through lower cap-shaped pressure of fingers to drive the clamping rods to retract, the box body is disengaged from the support, quickness and reliability are achieved, and the cuttings accumulating box is convenient to disassemble and assemble.

The worktable is composed of fine positioning platform module, coarse positioning platform module and base module. Base module is located at bottom most. Being located above the base module, coarse positioning platform module can be moved related to base module along Y direction. Through magnetic suspension guide track, the base module supports the coarse positioning platform module. Being located above the coarse module, fine positioning platform module through magnetic suspension guide track supported by the coarse module can be moved related to the coarse module along X direction. Cable desk, balancing piece and electromagnet can reduce position error and increase rigidity of work head effectively. The invention can realize XY linear motion, and fine motions in 6D: X, Y, Z,ª’X, ª’Y, ª’Z. Features are: simple structure, good rigidity, low energy consumption and high precision. The invention is suitable to photo etching under extra ultraviolet etc.

The invention provides a measurement scale and a manufacturing method and a using method thereof. The measurement scale is located outside a pixel region of an array substrate or a colored film substrate and comprises multiple graphic marks, wherein the graphic marks are formed by the material for any two layers of patterns of the array substrate or the colored film substrate, and deviation values of the line-width unilateral etching amounts of the two patterns and the coincident accuracy between the two patterns are visualized through the measurement scale. By combining with a pattern forming mechanism on the array substrate or the colored film substrate in the manufacturing process, the measurement scale located outside the pixel region is manufactured. The measurement scale adopts a contrasting method rather than an absolute scale for measurement, the accuracy error problem of the absolute scale itself is eliminated, and the specific deviation values of the line-width unilateral etching amounts and the coincident accuracy can be directly read out. The measurement scale can be used for any engineering section before or after etching, device measurement errors are eliminated, and abnormal tracking and test implementation are facilitated.

The invention relates to a digital correlator testing system and method, and belongs to the space microwave remote sensing technical field; the system and method firstly shunt, amplify, filter and phase shift a high frequency signal source, then carry out signal down conversion to needed intermediate frequency, and finally amplify and output in a combined path; the output signal frequency and thesignal source frequency are different, and segmented amplification is employed, thus effectively preventing inter-channel crosstalk and amplifier self excitation conditions, and greatly improving theoutput signal stability. The noise signal phase shift operations of the method are carried out in the high frequency band, thus reducing the signal bandwidth frequency ratio (B / f<<0.05), effectively eliminating the correlation noise signal decorrelation effect, and greatly improving the output signal correlation precision; the method is suitable for all digital correlator tests.

The invention provides a movable centre grinding device, which comprises a lathe tailstock telescopic shaft, a micro grinding machine and a stepless speed regulating motor, wherein the tip of the lathe tailstock telescopic shaft is provided with an axial inner taper hole; the micro grinding machine is arranged on a tool rest of a lathe small carriage; the stepless speed regulating motor is used for driving a movable centre mandrel to rotate; the stepless speed regulating motor is arranged on a horizontal supporting platform; and the horizontal supporting platform is arranged on the outer circle wall of the lathe tailstock telescopic shaft. Due to the adoption of the movable centre grinding device, the axis deviation, caused by rotation under different standards, of the movable centre mandrel is avoided, and accuracy errors caused by grinding with a conventional cylindrical grinding machine is eliminated; and the device has the advantages of simple structure, easiness, practicability, and easiness in installing and adjusting.

The invention discloses a method for improving the calibration accuracy of an industrial robot tool coordinate system, which belongs to the field of industrial robot application control. In the common "four-point method" tool coordinate system calibration process, this method gives an accuracy evaluation for each point to be calibrated. When the accuracy meets the requirements, the next calibration point can be calibrated, and all calibration points are recorded. Finally, an overall accuracy evaluation is given to the final calibration results. This method is convenient for the user to teach a reasonable calibration point, eliminates the human error caused by the user during the calibration process, and obtains a high-precision tool coordinate system calibration result, thereby eliminating the trajectory tracking caused by the inaccurate tool coordinate system calibration Motion problems such as low precision. The tool coordinate system calibration lifting algorithm proposed by the invention does not need to add any calibration device, and the operation is simple and convenient.

The invention discloses a method for installing an independent cargo tank of a cargo ship. Align the vertical coordinates of the cargo tank installation panel, the abscissa coordinates of the tank bottom installation panel and the cargo tank installation panel; collect the coordinate data of the tank bottom installation panel and the cargo tank installation panel, according to the coordinates of the tank bottom installation panel and the cargo tank installation panel data, correct the positioning position of the gasket on the installation panel at the bottom of the tank, and install the anti-wear gasket at the corrected positioning position of the gasket; hoist the independent cargo tank to the cargo hold. The present invention reduces the difficulty of achieving precision in each step, improves the effective contact effect between the anti-wear gasket and the steel gasket above the insulating gasket, reduces manual processing workload, improves the construction environment, and shortens the construction period .

This invention relates to simultaneous phase angle digital tracing method in the relative technique field and is characterized by the following: first inputting the simultaneous signals into radio measurement circuit to get the frequency division of outer crystal clock of CI and plug parameters of CR; then using the CI, CR as frequency division values input to the plug and division circuit.