38 results about "Accuracy class" patented technology

The invention relates to a transmitting and measuring method for a sea-crossing height. The method comprises the following steps: according to the measurement accuracy class of the sea-crossing height, choosing a sea-crossing graph, and arranging a sea-crossing site; measuring the waggle quantity of an offshore platform so as to obtain a change range of a vertical angle of a total-station instrument of the platform; according to the sea-crossing distance, the measurement class and the level of the instrument, determining the survey time number of the sea-crossing height measurement and an observing and surveying group number of the vertical angle during semiobservation; according to the wobble quantity of the platform, determining the number of times of reading the vertical angle collimated once; connecting an electronic data recorder with the total-station instrument, setting parameters of the number of the times of reading the vertical angle collimated once, a time interval between the twice adjacent reading and the like, performing synchronous opposite direction observation by a triangulated height method, and automatically recording and storing observation data by the electronic data recorder; calculating and outputting an observing and surveying outcome table of the vertical angle in a standard format by using interior work software; according to observation data of the sea-crossing distance, the altitude of the vertical angle, the altitude of the instrument, the altitude of a target and the like, calculating a sea-crossing altitude difference observing and surveying value. The transmitting and measuring method disclosed by the invention is particularly suitable for transmitting and measuring the sea-crossing height of the total-station instrument of a measuring station under the condition of wobble.

The present invention proposes a source data annotation extension method for civil aircraft technical publications, which can add additional or detailed annotation information to the source data so as to effectively track it in maintenance activities of technical publications. The present invention proposes a classification of source data systems based on labeling requirements and data types; on the basis of effective classification, it is analyzed whether there are subunits with data independence in the data composition and structure of source data that must be marked, and its data can be decomposed property; for decomposable source data, the subunit information formed by decomposing is transformed into the label information corresponding to the source data. The invention improves the change tracking accuracy of source data when technical publications are maintained, so that the positioning accuracy of this type of source data can reach below the file level, avoiding some data modules being mistakenly classified as waiting for maintenance, and reducing business errors to a certain extent , thus saving manpower and resource costs for the maintenance of technical publications.

The invention discloses a multifunctional hydraulic cleaning and filtering method. An existing hydraulic oil filtering method can not provide multiple filtering accuracy classes and can not carry outdata analysis on hydraulic oil pollutants. The multifunctional hydraulic cleaning and filtering method comprises the following steps that oil passes through an oil return detection opening, a magneticfilter and a coarse filter during oil return; the oil passes through an oil outlet detection opening, an adjustable filtering accuracy circuit, a fine filter and a main oil tank oil absorption filter, and the adjustable filtering accuracy circuit has three filtering accuracies for choice; a detection device which is connected with the oil return detection opening and the oil outlet detection opening provides an on-line detection function, and when the values of the pollutants reaches the preset values in the different filtering accuracies, an alarming device alarms automatically; and when theoil is required to be supplemented, the oil in an oil storage tank enters a main oil tank through an oil storage tank oil absorption filter and an oil storage tank oil pump sequentially. Free switchon the three different filtering classes is provided, and the field adaptability is high.

The invention provides a calibration device used for error measurement of a super-high voltage transformer, comprising an admittance network consisting of a standard capacitance box and a standard conductive box, a precise voltage divider, an induction-typed shunt and a null instrument. The calibration device can be used as the error measurement device when the voltage transformer is being calibrated by the capacitance-typed voltage proportion standard, adopts the difference value measurement principle to calibrate the ratio difference and the phase difference of the voltage transformer to be tested, realizes directly reading the ratio difference and phase difference of the voltage transformer to be calibrated by the conductivity quantity and capacitance quantity of the admittance network, and can calibrate the electromagnetism-typed or capacitance-typed voltage transformer within the voltage range of 110-1000KV. When calibrating the voltage transformer used for the measurement with the accuracy class of 0.05 or above, the uncertainty introduced by the calibration device is less than or equal to 5.3*10<-6> and when calibrating the voltage transformer used for the power with the accuracy class of 0.05 or above, the uncertainty introduced by the calibration device is less than or equal to 2.3*10<-5>.