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85 results about "Site engineer" patented technology

Site engineers act as day-to-day managers on a construction site, and the main source of technical advice and quality control for everyone working on it. The role also involves levelling and surveying a site, checking drawings and quantities and ensuring the accuracy of calculations.

HAFD segmented optimization method and system

The invention relates to an HAFD (Horizontal-well Acid Fracturing) segmented optimization method and system. The optimization method comprises the following optimization flow: simulating a horizontal well segmented matrix acidization, predicting acidizing capacity for forming the horizontal well segmented matrix, predicting the capacity of the segmented acid fracturing horizontal well, optimizing segmented acidizing and acid fracturing for the horizontal well, realizing digitalization of well logging drawings, and combining the segmented matrix acidizing technology with the acid fracturing technology. The optimization system comprises a basic data subsystem, a log data subsystem, a well bore configuration definition subsystem, an acidizing simulation subsystem and a prediction evaluation subsystem. The optimization method disclosed by the invention is ingenious and reasonable in conception, simple in steps, and capable of avoiding the problems that the carbonatite reaction kinetic model is complicated and difficult to apply and estimating the acid absorption content of the stratum segment more accurately. The optimization system disclosed by the invention is simple and reasonable in structure, and capable of realizing integrated design process of the parameter design of the acidizing and acid fracturing technologies, effect prediction and economic evaluation, and brings convenience for field engineers to carry out optimization design on the acidizing scheme.
Owner:BEIJING GOODLUCK PETROLEUM TECH CO LTD

Open-pit mine demolition effect evaluating method

Provided is an open-pit mine demolition effect evaluating method. The method adopts the following steps that an image capture device is installed on a safety platform of a demolition bench; on-site images are captured by the image capture device to obtain actual on-site required parameters, and demolition construction is conducted by a staff member based on an actual distance; the number and the distance of slungshots, the shatter value coefficient of demolition muck pile, the size and the number of massive rocks and the number of blind holes are identified from the images collected by an image identification system as evaluating index values; the number and the distance of the slungshots, the shatter value coefficient of the demolition muck pile, the size and the number of the massive rocks and the number of blind holes are preset as standard index values in a data processing system; the index values collected are compared with the corresponding standard index values by the data processing system; evaluating index values above the standard index values are analyzed, demolition parameters are adjusted, and the next round of a demolition is conducted. The method has the advantages that the method is accurate, open-pit mine demolition effects such as the number of the slungshots, blind shot judgement and demolition muck pile information are evaluated quantitatively, operation is convenient and easy, the method is safe and reliable, and the work amount of an on-site engineer is reduced.
Owner:GEZHOUBA YIPULI XINJIANG BLASTING ENG CO LTD +1

Method for determining safe vertical distance between shield and karst cave in sand karst stratum

ActiveCN106372297AThe safety distance expression is simple and clearEasy to operateDesign optimisation/simulationSpecial data processing applicationsKarstElement modeling
The invention provides a method for determining a safe vertical distance between the shield and karst cave in the sand karst stratum. The method comprises the following steps: firstly, surveying the field geology of a project; secondly, establishing a finite element analytical model by utilizing three-dimensional finite element modeling software for simulating a karst cave, the excavation face balance, the stratum loss, a lining and slag cart and the shield tunnel construction excavation; thirdly, calculating the vertical displacement of shield tunnel excavation on the karst cave under different working conditions; and fourthly, making a normalized relational graph of the karst cave roof sedimentation and the distance between the karst cave and the tunnel. The method sufficiently takes shield tail volume loss into consideration when the karst cave is positioned under a tunnel during shield tunnel construction, and calculates a safe vertical distance formula for the tunnel excavation influenced karst cave by analyzing the normalized relation among karst cave roof sedimentation, vertical distance between the karst cave and the tunnel and the diameter of the karst cave; and the formula is simple and clear, is beneficial to quick and intuitive judgment of a field engineer, and can be used for improving the construction efficiency.
Owner:SHANGHAI JIAO TONG UNIV

Steam turbine host fault diagnosis method based on feature selection of stationary and non-stationary vibration signals

The invention discloses a steam turbine host fault diagnosis method based on feature selection of stationary and non-stationary vibration signals. For a steam turbine in a thermal power steam turbineunit, the method combines use of ensemble empirical mode decomposition (EEMD) and a recursive feature elimination method to decompose and extract key features of the stationary and non-stationary signals in detail, and uses the same for fault diagnosis of steam turbine vibration signals. According to the method, the characteristics of non-stationarity, massive noise inclusion and the like of the steam turbine vibration signals are fully considered, potential information contained in fault data is fully exploited, features are respectively extracted for the stationary and non-stationary data, and the problem that non-stationary data features are liable to be masked is overcome. At the same time, the key features are extracted, dimension quantity of feature vectors is decreased, redundancy of data is reduced, accuracy of fault diagnosis of the steam turbine vibration signals is improved, accurate repair of an on-site engineer on a fault is facilitated, thus safe and reliable running of generator steam turbine equipment is guaranteed, and production benefits are improved.
Owner:ZHEJIANG UNIV

Glutenite hydrofracture simulation method based on discrete element

The invention relates to a glutinite hydrofracture simulation method based on a discrete element. The method comprises the following steps of: S1, constructing a wall and a well bore, generating particles according to a size grading curve, and performing initial balance calculation, S2, dividing the particles into a matrix and gravel by a cutting method, endowing the matrix and the gravel with different cementing parameters, S3, adding a seepage field and endowing a corresponding flow parameter, S4, applying confining pressure on the external wall based on a servo system, setting a fluid injection speed, S5, monitoring cementing states of the particles in real time, and judging whether micro cracks are generated according to the cementing states, and S6, continuing simulation till penetration of hydraulic cracks occurs. The glutinite hydrofracture simulation method based on the discrete element can characterize crack initiation and expansion mechanisms of the hydraulic cracks preciselyfrom a microscale, and accurately capture a macro distribution morphology of the hydraulic cracks, so that the understanding of a field engineer on an expansion rule of the hydraulic cracks of a glutinite reservoir is enhanced; and a fracture design is improved.
Owner:QINGDAO UNIV OF SCI & TECH

Digitized assembling supporting system and method of aero-engine parts

The invention discloses a digitized assembling supporting system and method of aero-engine parts. The system comprises a central computer control unit, a part assembling process database, an assembling station laser-assisted orientation device, an assembling station digitalized display platform and an approach part code scanning system; after reading the code information of approach parts recognized by the code scanning system, the central computer control unit extracts corresponding parts assembling data from the part assembling process database, and respectively transmits to the laser-assisted orientation system and the digitalized display platform; the digitalized display platform repeatedly plays the assembling process procedure and assembling process simulation animation of the partsto be assembled, so as to remind on-site engineers; a laser projector projects a pointed laser beam to the installation position of the parts to be assembled on the engine assembling body; the on-siteengineers executes the on-site assembling tasks of the parts. The digitized assembling supporting system and method of aero-engine parts, the overall assembling efficiency of the aero-engine can be remarkably improved while the installation positions of the parts can be rapidly and accurately positioned.
Owner:TSINGHUA UNIV

Intelligent power plant pump machine fault diagnosis method based on vibration signal stationary non-stationarity discrimination and feature discrimination

The invention discloses an intelligent power plant pump machine fault diagnosis method based on vibration signal stationary non-stationarity discrimination and feature discrimination. The method mainly aims at the pump equipment in the thermal power generating unit, and decomposes the original signal to obtain a plurality of eigenmode components through the empirical mode decomposition, and overcomes the mode aliasing problem of the EMD decomposition by using the wavelet decomposition. At the same time, the stationarity of the decomposed sub-signal is discriminated, and the stationary part andthe non-stationary part are respectively calculated. In the aspect of feature computation, the first and second frequency-doubling features are added because the frequency spectrum of the pump vibration signal changes obviously when it is abnormal. In addition, the selection of key features reduces the dimension of eigenvectors, reduces the redundancy of data, improves the accuracy of fault diagnosis of vibration signals of pumps in thermal power generating units, and helps engineers to repair the faults accurately, so as to ensure the safe and reliable operation of power generation process and improve the production efficiency.
Owner:ZHEJIANG UNIV

Machine bench performance matching method and system of semiconductor manufacturing equipment

The invention discloses a machine bench performance matching method and system of semiconductor manufacturing equipment. The system comprises a plurality of processing machine benches, a fault detection and classification system, a product quality tester and a data collecting engine and processing system. The processing machine benches execute a same product manufacturing technology and machine products of a same specification. The fault detection and classification system monitors production processes of all the processing machine benches in the technology process. All monitored process variable data are provided for the data collecting engine and processing system. The product quality tester tests quality of the machined products in the technology process in a sampling mode and provides quality data for the data collecting engine and processing system. Through performance matching of the processing machine benches in the same technology process, key process variables of the machine benches affecting and leading poor quality are rapidly found, and a parameter adjustment scheme is provided for a field engineer in the process of maintaining the machine benches, so that the products manufactured by the different machine benches almost are the same in quality.
Owner:江阴百盛电气控制有限公司

Power substation secondary system failure reconnaissance method

The invention discloses a power substation secondary system failure reconnaissance method. The power substation secondary system failure reconnaissance method comprises following modules: an information inputting and comparing module, an information real-time transmission module, an engineer data module and a failure simple treatment scheme module, wherein the information inputting and comparing module is used for inputting all kinds of site data to a database of an engineer on site, the site data comprise pictures and variable data of corresponding parameters, the data are compared in a common fault database of a power substation secondary system which is originally built, and the fact that whether failure occurs in the secondary system and the type of the failure are compared. The information real-time transmission module is used for carrying out a real time transmission function, and has the image, character and voice transmission functions. The engineer data module is used for building a database of secondary system maintenance engineers and recording the maintenance aspects at which a corresponding engineer is good, and enabling coordination staff to find an appropriate engineer rapidly and conveniently. The failure simple treatment scheme module is used for establishing the treatment scheme of a common failure, namely, the simple treatment scheme of the common failure is summarized in the simple treatment scheme module, and accessories are provided; a flow chart and simple measures of treatment of the failure are inquired through the method of inputting the name of the failure.
Owner:STATE GRID CORP OF CHINA +1

Drilling engineering parameter state detecting method

The invention discloses a drilling engineering parameter state detecting method. The drilling engineering parameter state detecting method comprises the following steps of (S101) acquiring sampling data of drilling engineering parameters at current time; (S102) judging whether the sampling data at the current time exceeds a preset top and bottom limitation threshold value, determining that the sampling data at the current time are abnormal and carrying out the step (S103) if the sampling data at the current time exceed the preset top and bottom limitation threshold value, and determining that the sampling data at the current time is normal and carrying out the step (S104) if the sampling data at the current time do not exceed the preset top and bottom limitation threshold value; (S103) judging sampling data at preceding n times are abnormal or not, determining that drilling engineering parameters are abnormal if the sampling data at the preceding n times are abnormal, and carrying out the step (S104) if the sampling data at the preceding n times are not abnormal; and (S104) judging the number of abnormal sampling data at the current time and preceding m times reaches k or not, determining that drilling engineering parameters are abnormal if the number of the abnormal sampling data at the current time and the preceding m times reaches k, and determining that the drilling engineering parameters are normal if the number of the abnormal sampling data at the current time and the preceding m times does not reach k. In the above-mentioned steps, m, k and n are positive integers, m is greater than k, and k is greater than n. By the drilling engineering parameter state detecting method, instantaneity and accuracy of judgment results can be guaranteed, and field engineers can be warned for the first time if underground conditions are complicated.
Owner:CHINA PETROLEUM & CHEM CORP +1
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