34results about How to "Improve compensation accuracy" patented technology

The invention discloses a display apparatus and a method of compensating an image of a display panel using the same. The display apparatus includes a first compensator, a second compensator and a display panel including pixels. The first compensator generates a first compensation coefficient based on sensing data of a pixel of the pixels for a first grayscale value, generates a second compensation coefficient based on camera imaging data for a second grayscale value greater than the first grayscale value and compensates image data based on the first compensation coefficient and the second compensation coefficient. The second compensator compensates the image data by modeling sensing data of entire grayscale range based on sensing data of the pixel for a third grayscale value and a fourth grayscale value. The display panel displays an image based on the image data compensated by the first compensator and the second compensator.

The invention discloses a two-dimension angle-variable electronic belt scale weighing compensation method and system. The method includes: utilizing a method that cosine values of positive and negative angles are equal to acquire a datum offset angle; calculating compensation accumulation quantity Q according to the datum offset angle and angles between Y and Z directions and a horizontal straight line to correct compensation angle offset caused by actual stressed structure state of a scale frame for compensation. By the method, compensation accuracy is improved greatly. The system is characterized in that a load sensor, a speed sensor, a Z-direction angle sensor and a Y-direction angle sensor are all fixedly mounted on the electronic belt scale frame and all connected with a two-dimension angle-variable belt scale instrument. The problem of metering errors caused by changing of two-dimension inclination angle of an angle-variable electronic belt scale in the process of metering is solved effectively, and application range is wide.

The invention discloses a three-phase reactive power unbalance compensation method. An execution system comprises at least one group of capacitors capable of achieving division and compensation functions. The compensation method comprises the following steps: (1) collecting three-phase voltage and current values of a system power supply, calculating a reactive power value of each phase, and taking the minimal reactive power value as a reference value; (2) sequentially finding the difference between the reactive power value of each phase and the reference value, taking the comparative result of the difference value of each phase and a corresponding input threshold as a judgment condition of entering an input link, and if the different value of each phase is greater than the corresponding input threshold, entering the input link, or else, entering a removal link; (3) taking whether status words of dividing and compensating capacitors of which the input orders are set as the first group are completely input or not as the judgment condition of entering the removal link, and if so, entering the removal link, or else, entering an instruction sending link; and (4) in the sending link, taking the comparative result of the current status words of each group of capacitors and a corresponding backup word as the judgment condition of sending a switching instruction, if the current status words are consistent with the corresponding backup word, not sending the switching instruction, and if the current status words are not consistent with the corresponding backup word, driving split-phase switching.

The invention discloses a control method and a control system for a multi-degree-of-freedom displacement change compensation platform, including a controller and a multi-degree-of-freedom platform. The multi-degree-of-freedom platform includes an upper platform, a lower platform, and a platform hinged between the upper platform and the lower platform. Six actuators, drive the actuators to expand and contract through the servo valve, measure the attitude of the lower platform through the attitude sensor, according to the expansion and contraction Δd of the six actuators i , get the compensation amount K corresponding to the six actuators i =-Δd i , and then control the six servo valves to drive the piston rods of the corresponding actuators until the corresponding compensation amount K i . It is used to perform PID closed-loop adjustment and correction on the predicted deviation between the future motion curve and the actual motion curve, and to perform quadratic adjustment on the predicted deviation between the future motion curve and the actual motion curve according to the actual displacement of the six actuators. Correction.

The invention provides an online automatic correction system and correction method for ion signal intensity. The correction system used includes a signal continuous monitoring program, an online automatic correction program, a voltage parameter control program, a power supply module and a signal generating device. The automatic calibration method is to use the above-mentioned automatic calibration system to set the ideal signal value of a certain ion monitored through the signal continuous monitoring program, and obtain the current signal value generated by the signal generating device, and then feed it back to the online automatic calibration program. After a certain comparison operation, the automatic calibration program feeds back the corrected voltage parameters to the voltage parameter control program, allowing it to control the power module to complete the automatic voltage rise and fall. The final result is that the next signal strength obtained by the signal continuous monitoring program is closer to the preset value, and feed the value back to the online automatic calibration program, and so on, so that the collected signal value is always stable around the set value.

The invention discloses a topological structure and a control method of an improved SEN transformer. The topological structure of the improved SEN transformer consists of an SEN transformer and a unified power flow controller connected in series, wherein the SEN transformer is connected with an electric transmission line in series; a parallel connection variator VSC1 of the unified power flow controller is connected with the equivalent head end of a power distribution network transmission system in parallel; a parallel connection variator VSC2 of the unified power flow controller is connected with the equivalent tail end of the power distribution network transmission system in parallel. 360-degree discrete adjustable series connection voltage is realized through controlling a common on-load tap changer by the SEN transformer; 360-degree continuous adjustable series connection voltage is realized through controlling an electronic power switch by the unified power flow controller. The topological structure and the control method of the improved SEN transformer have the advantages that the voltage is continuously adjustable, the compensation accuracy is high, the switching vibration problem is avoided, and the like, and can be used for regulating and controlling the electric transmission line power flow distribution.