40results about How to "Reduce indicator requirements" patented technology

The invention discloses a radial horizontal drilling system using supercritical carbon dioxide and a drilling method thereof. The drilling system comprises a liquid carbon dioxide supplying device, a drilling device, an in-well pressure control device, a solid, liquid and gas three-phase separating device and a carbon dioxide recycling device, wherein the drilling device is arranged in a shaft, and includes an oil pipe, a steering gear mounted at the bottom of the oil pipe, and a flexible drill stem sleeved in the oil pipe; the flexible drill stem passes through the steering gear and then realizes steering; the flexible drill stem has a hollow drill stem channel; a supercritical carbon dioxide jet drill is mounted at the end of the part, in a horizontal direction, of the flexible drill stem; a nozzle, which is communicated with the drill stem channel, is formed on the jet drill; the in-well pressure control device is disposed at the opening of a well; the solid, liquid and gas three-phase separating device and the carbon dioxide recycling device are disposed on the ground. The radial horizontal drilling system disclosed by the invention uses supercritical carbon dioxide fluid as rock breaking fluid, thus avoiding pollution to oil reservoir layers, effectively protecting the oil reservoir layers, greatly increasing rock breaking efficiency, and realizing cyclic utilization of the carbon dioxide; and the radial horizontal drilling system using supercritical carbon dioxide and the drilling method thereof have important application value to increase of production of old wells and to development of unconventional oil-gas reservoir.

The invention relates to a self-calibrating method of internal reference resistors of a multi-range digital electronic measuring instrument, comprising the following steps of: on the basis of the design line of the traditional digital electronic measuring instrument, additionally setting an electronic switch and a self-calibrating program; setting a resistor with good long-term stability as an internal standard resistor in a set of internal reference resistors; when in a self-calibrating state, controlling the electronic switch by using the self-calibrating program to form different combinations so as to obtain comparing and measuring circuits among different reference resistors; and respectively and directly or indirectly comparing the reference resistors with the set internal standard resistor to measure respective actual resistance values and storing the actual resistance values in an internal storage for automatically correcting measuring results. Because only one standard resistor with good long-term stability needs to be adopted, other reference resistors are compared and calibrated with the standard resistor, and the method effectively reduces the requirements of other reference resistors, is beneficial to reducing the production cost and ensuring the measuring precision of each measuring process so that the calibration in the production process and the periodic calibration of users both are simpler and more effective and accurate.

The invention relates to an optical autocollimation-type dynamic precise horizontal measuring method, which is used for solving the problem of the horizontal information precise measurement under the situations of complete static status, quasi-static status-quasi-dynamic status and complete dynamic status. Automatic-leveling principle of liquid is used as a reference beachmark of the ground level, an autocollimation-type parallel optical tube is used as a horizontal error detection tool, an inertia synchronous repeating platform is used as a dynamic measurement transitional beachmark, an optical coding angle measuring element is used for realizing the measurement of the position of the repeating platform, and a measuring system generally consists of a detection device, an information processing and control circuit and a main monitoring platform which are connected with one another through wires and cables. Due to the adoption of the method, high-precision horizontal posture information can be provided for a movable carrier (such as a vehicle, a ship, an airplane and the like) in real time. The method can also be used for measuring horizontal structural deformation of the carriers, for identifying the inertial guidance horizontal precision, and the like.

The invention provides a multi-engine parallel rocket control device with power redundancy capability. The multi-engine parallel rocket control device includes detection equipment, computing equipment and execution equipment, wherein the detection equipment is used for collecting core working parameters of engines; the computing equipment performs intelligent calculation and analysis on the collected parameters based on a fault model, according to a corresponding intelligent algorithm, engine fault diagnosis results are given, and a corresponding control strategy is selected according to the diagnosis results; and the execution device receives instructions given by the computing equipment, and the corresponding control strategy is executed. In addition, the invention further provides a method for controlling a multi-engine parallel rocket using the control device.

A shipborne all-time starlight and inertia combined navigation system comprises a starlight navigation system, an inertia navigation system and a time-giving system, wherein the starlight navigation system comprises an optical system, a detection circuit and an image processing module, the inertia navigation system provides coarse gestures for the starlight navigation system and can decrease the error matching probability and matching speed of the starlight navigation system, the time-giving system provides universal time and pulse per second and is used for an ITRS coordinate system and an ICRS coordinate system, the pulse per second is used for synchronization of work cycles of the combined navigation system, and the starlight navigation system calculates high-precision navigation information and conducts output. According to the shipborne all-time starlight and inertia combined navigation system, the mode of combining the starlight navigation system with the inertia navigation system is adopted, the near-infrared band is selected to serve as the working band so that the combined navigation system can work under the all-time condition, miniaturization of the navigation system is achieved, and meanwhile high precision of the navigation system is further guaranteed.

The invention discloses a digital compensation method. The method comprises the steps of determining a digital baseband signal for emitting a leakage interference signal and a digital baseband signal for receiving the interference signal through emitting signals, and carrying out digital compensation on received signals according to the digital baseband signal for emitting the leakage interference signal and the digital baseband signal for receiving the interference signal. The invention further discloses a digital compensation device and a duplexer. By means of the technical scheme, power amplification efficiency is improved, the index requirements for the duplexer are lowered, and performance of an FDD system is improved; in addition, the method and device are especially suitable for FDD systems.

The invention aims to provide a low-cost, stable and high-quality image acquisition device and a corresponding defect detection system. In order to achieve the purpose, the invention adopts the following technical scheme: the image acquisition device for a circular knitting machine comprises a plurality of cameras which are arranged at intervals in the circumferential direction of a rotating shaftof a circular knitting machine and are used for acquiring real-time images of fabrics in production inside or outside the circular knitting machine, a control transmission module which is electrically connected with the plurality of cameras respectively and is used for controlling shooting actions of the cameras and storing/transmitting image data acquired by the cameras, and a driving/transmission mechanism which is used for driving or enabling the cameras, so that the cameras synchronously rotate with the circular knitting machine when the circular knitting machine runs.

The invention provides a method for absorbing wind turbine blade wastes in a cement kiln. The method comprises the following steps: separating metal parts and high-chlorine content parts in the wind turbine blade wastes, and segmenting the remaining wind turbine blade wastes as massive wastes; grinding the massive wastes into particles so as to obtain ground materials; and taking the ground materials as alternative fuel of the cement kiln, and combusting the fuel in a cement kiln decomposing furnace. The method disclosed by the invention is simple, practical, less in initial investment and subsequent maintenance cost, environment-friendly and harmless, belongs to a circular economy manner, accords with the treatment policy of 'reduction, recycling and harmlessness' of municipal wastes, can thoroughly implement and carry out the national policy of cooperatively treating non-medical wastes and industrial wastes in the cement kiln, solves the thermosetting material waste disposal difficulty problem troubling the society for a long time, provides alternative fuel and raw materials for the high-energy-consumption cement industry and has wide application prospects.

The invention discloses an inertial measurement system error separation method based on centrifugal machine large overload excitation, which comprises the following steps: by utilizing the characteristic that the length of a centrifugal machine lever arm is not changed and combining a rotation angle of the centrifugal machine lever arm in a rotation process, obtaining a movement track of an inertial measurement system mounted on the lever arm; in addition, obtaining a motion track with an error by performing navigation calculation on the apparent acceleration of the inertial measurement system, wherein the error is mainly caused by measurement errors of a gyroscope and an accelerometer; by comparing the difference values of the two tracks, separating various error coefficients of the inertial measurement system by adopting a least square method, and improving the precision of inertial navigation through error compensation.

The invention provides a total internal reflection color-combination prism, which comprises a first interface, a second interface, a third interface, a fourth interface, a fifth interface, a sixth interface, a seventh interface, an eighth interface, a first surface, a second surface, a third surface, a first incident face, a second incident face, a third incident face and an emergent face, wherein the seventh interface and the eighth interface are crossed and vertical to each other; the seventh interface transmits red light and green light and reflects blue light; the eighth interface transmits the blue light and the green light and reflects the red light; the red light incident from the first incident face is transmitted through the first interface and the fourth interface, and transmitted out of the first surface; the green light incident from the first incident face is transmitted through the second interface and the fifth interface, and is transmitted out of the second surface; the blue light incident from the first incident face is transmitted through the third interface and the sixth interface, and is transmitted out of the third surface; the light incident from the first incident face is reflected by the eighth interface and is emergent from the emergent face; light incident from the third surface is reflected by the seventh interface and is emergent from the emergent face; and light incident from the second surface is directly transmitted by the seventh interface and the eighth interface, and is emergent from the emergent face.

The invention relates to a self-adaptive compensation fluxgate sensor which is composed of an excitation circuit, a sensitive element, a detection circuit, a feedback circuit, a microcontroller and amagnetic field compensation circuit. The microcontroller executes a corresponding self-adaptive control algorithm and combines a corresponding electronic circuit and a compensation coil to achieve real-time automatic compensation of a changing magnetic field, and compensation operation is performed on an original measured magnetic field signal, so that the index requirement on an A/D chip is reduced, and the problem that a large dynamic range and a high-resolution index are difficult to realize at the same time is solved. Under the condition of the same dynamic range and resolution index constraints, the technical scheme provided by the invention can save the effective digit of the A/D chip by 10 bits, and in addition, the invention can perform real-time adaptive compensation on the changed magnetic field without manual adjustment, thereby meeting the application requirements of long-term monitoring of the magnetic field.

The invention relates to a variable gain correlated double sampling circuit and a control method. The variable gain correlated double sampling circuit is provided with a switch K1, a switch K2, a switch K3, a switch K4, a switch K5, a switch K2_b, a switch K3_b, a switch K4_b, a switch K5_b, a capacitor C1, a capacitor C2, an operational amplifier OPA and a variable gain control module G, and is also provided with a circuit with a symmetrical structure: a node A' is symmetrical with the node A, a node B' is symmetrical with the node B, a node C' is symmetrical with the node C, a node D' is symmetrical with the node D, and a node E' and a node E are symmetrical; the circuit structure located at the in-phase input end of the operational amplifier is the same as the circuit structure located at the anti-phase input end of the operational amplifier, the in-phase output end of the operational amplifier outputs a signal VOUTP, and the anti-phase output end of the operational amplifier outputs a signal VOUTN. Parallel work of the sampling circuit and the holding and amplifying circuit is realized, pixel correction is not needed, and subsequent image processing work is simplified. And after the differential signal is amplified, the post-stage numerical quantization ADC index requirement is reduced.

The invention discloses an FPGA on-chip clock duty ratio test method and a clock self-test FPGA, and relates to the integrated circuit technology. The clock self-test FPGA comprises an I/O interface unit, a clock management circuit unit and a tested clock network, and is characterized by further comprising a D trigger, the input end of the clock management circuit unit is connected with a clock source, and the first output end of the clock management circuit unit is connected with the input end of the tested clock network; the output end of the tested clock network is connected to the D end ofthe D trigger, the second output end of the clock management circuit unit is connected with the input end of the sampling clock network, the output end of the sampling clock network is connected to the CLK end of the D trigger, the output end of the D trigger is connected to an output logic detection function circuit, the output logic detection function circuit is connected with the I/O interfaceunit, and a dynamic phase shift logic function control module is connected with the clock management circuit unit. According to the invention, the index requirements on test instruments and equipmentare reduced.

The invention discloses a method for effectively reducing GPON ONU burst time. The method comprises the following steps of S01, opening Telnet login and opening a register read/write command; S02, adjusting an optical power transmitting register, judging whether a value reaches the minimum optical power target value or not, entering a next step if the value reaches the minimum optical power targetvalue, otherwise, carrying out adjustment continuously; S03, translating a mod lookup table, judging whether an extinction ratio reaches a target value or not, entering the next step if the extinction ratio reaches the target value, otherwise, adjusting the extinction ratio continuously; and S04, finishing the method. According to the method, under the condition of not modifying a hardware circuit, the problem that the ONU burst time is insufficient is effectively processed through adoption of a software method. A range is expanded when optical devices BOSAs are selected for a product. Related index demands for a transmitting optical device are reduced, the cost is reduced, and the risk resulting from the fact that the product depends on the unique device is reduced.