186 results about "Observational method" patented technology

The invention relates to an observation method and device for an electromagnetic torque of a salient pole type permanent-magnet brushless direct current motor, and is particularly suitable for the electromagnetic torque and rotation speed control of a motor driving system without position sensors or speed sensors. The observation method and the observation device utilize a rotor counter electromotive force self-adapting stator current observation device, a phase-locked loop based rotor rotation speed and position angle observation device, a rotor counter electromotive force/rotor flux/rotor position angle relation curve, a coordinate conversion device, a stator flux computing device and an electromagnetic torque computing device to observe the electromagnetic torque continuously, instantly and accurately when the position sensors are not available, and observe rotor speed and stator flux in an intermediate variable manner simultaneously, so that the sensorless, high-performance and direct-torque control requirements of the motor are met. The observation method and the device have the advantages of good instantaneity, high observation accuracy, low cost and the like.

The invention discloses a three-dimensional fine imaging system based on a drilling geological radar technology. The system comprises devices, such as a radar transmitting antenna, wherein the radar transmitting antenna is transmitted into a bore through a radar antenna transmitting device; a radar receiving antenna moves along a measuring line on a tunnel work area surface through a radar antenna driving device; the radar transmitting antenna and the radar receiving antenna are connected with a radar host machine; the radar host machine is respectively connected with a storage battery and a computer; the radar antenna transmitting device and the radar antenna driving device are connected with a control host machine; and the control host machine is connected with the storage battery through a power wire and controls the antenna to transmit and the driving device. The invention also provides a stereo three-dimensional observing method. Three-dimensional detection on surrounding media of the bore is realized by matching the method with a 'transmitting, receiving, circulating and detecting' way based on coverage observation for multiple times, and by a speed imaging method based on constrained reversion and a three-dimensional interpolation method, and the three-dimensional fine detection on the geological status in front of the tunnel work area surface is realized.

The invention discloses an observation method of a millimeter wave weather radar. The observation method of the millimeter wave weather radar comprises the specific steps that (1) a millimeter wave weather radar observation platform is set up, wherein the millimeter wave weather radar observation platform comprises an industrial control computer (1), an observation strategy setting module (2), an observation strategy scheduling module (3), an information acquisition module (4), an antenna controller (5) and a signal processor (6); (2) observation strategy parameters are set by the observation strategy setting module (2); (3) the observation strategy scheduling module (3) has control over the execution sequence of observation strategies, and carries out scheduling on the execution sequence of the observation strategies; (4) the information acquisition module (4) acquires antenna position information and echo processing signals of the millimeter wave weather radar. Therefore, observation of the millimeter wave weather radar is achieved. According to the observation method of the millimeter wave weather radar, setting of observation parameters is comprehensive and flexible, the control function is good, information of a weather object of an omnibearing three-dimensional space can be automatically obtained, weather data are complete, observation efficiency is high, and it is ensured that the requirement for research and application of the weather objects such as cloud is met.

The invention provides a method for observing the layered deformation of deep parts of foundations. The method adopts an observation mode combining shallow punctuation with deep punctuation, which can observe the deformation of a surface layer and a shallow layer of an experimental foundation, carry out layered observation to the layered deformation of the deep part of the foundation and accurately observe the layered deformation of the deep part of the foundation. The method can achieve the aim of omni-directionally observing the experimental foundation, and can accurately capture the horizontal and vertical deformation range of the foundation and determine the lower limit depth of collapsible loess, so as to provide powerful technical support for determining foundation treatment depth, treatment range and the negative friction range of a pile foundation.

The invention discloses a space debris orbit determination traversal observation method and system. A camera installed in a +Y-axis direction of a satellite arranged on a terminator sun synchronous orbit is controlled to rotate around a +Z axis; large-range scanning from a starting deflection angle to an ending deflection angle is achieved, then space debris orbit determination traversal observation of the synchronous belt is achieved; and in the observation process, through real-time calculation, the rotating angle of a satellite around the +X axis of a satellite body is controlled to ensurethat the visual axis of a camera is always perpendicular to the geosynchronous belt at the specified latitude.

The invention discloses a multi-disturbance-observer three-closed-loop stable tracking method based on acceleration and position disturbance information, mainly in order to solve the problem that thestability and tracking precision of a stable control platform are influenced due to intermediate-frequency and low-frequency external disturbance in the platform. According to the invention, an acceleration disturbance observer and a position disturbance observer are added on the basis of a traditional three-closed-loop system, so that the disturbance suppression capability of the system at intermediate frequency and low frequency is improved. Meanwhile, the invention provides a design scheme of the acceleration disturbance compensator and the position disturbance compensator, and the method can improve the anti-interference capability of the stable control platform on the basis of guaranteeing the stability of the system. The disturbance observation method does not need an additional sensor, does not increase the system cost, performs feed-forward compensation on the observed disturbance, and is easy to implement in engineering.

The invention relates to an electronic observation method for building settlement deformation. The method is characterized in that a datum point device is provided and is connected with one or a plurality of observation point devices through communicating pipes; a liquid with standard liquid level is stored in the datum point device and the observation point device and is used for providing constant water level in the observation point device; a vertical rod which floats on the surface of the liquid is also provided and is arranged in the observation point device to serve as a fixed grating of displacement electronic measurement; the vertical rod is sleeved in a displacement electronic measurement module; the displacement electronic measurement module is fixedly connected with the inner wall of the observation point device to serve as a moveable grating of displacement electronic measurement. The method has the advantages of high measuring precision, high stability, low cost, capability of realizing permanent real-time observation through once mounting and the like.

The invention discloses an online observation method and device for a gas-liquid-solid phase abrasive particle flow rotational flow field. In the research for the gas-liquid-solid phase abrasive particle flow rotational flow field, theoretical analysis is carried out on the motion rule of abrasive particles and microbubbles in the rotational flow field forming process; meanwhile, a particle image velocimetry (PIV) method is used for carrying out online experimental observation on the rotational flow field; related data and images are extracted from PIV experimental equipment; the motion rule of the abrasive particles and the microbubbles in the rotational flow field forming process is visually shown; online observation in the rotational flow field forming process is achieved; accuracy of theoretical analysis is verified; and a foundation is laid for deeply researching the flow field characteristics of the gas-liquid-solid phase abrasive particle flow rotational flow field and a control method of the gas-liquid-solid phase abrasive particle flow rotational flow field. The online observation device for the gas-liquid-solid phase abrasive particle flow rotational flow field is provided. Online observation in the forming process of the gas-liquid-solid phase abrasive particle flow rotational flow field can be achieved, interference-free, transient and full speed measurement in fluid research can be achieved, and high universality is achieved.

The embodiment of the invention relates to an observation method and system for minute-level rapid traversal of a high-orbit target, and the method comprises the steps: setting the observation capability of an observation system according to the combination of an observation region and a coverage demand for an observation target; sending the observation system to a quasi GEO orbit as an initial observation point; constructing a multi-satellite observation system with the total number of satellites being N by taking the initial observation point as the standard, wherein the system is a constellation evenly distributed on the quasi GEO orbit; if the track inclination angle i is equal to 0 degree, completing the system construction; and if the inclination angle i is not equal to 0, carrying out adaptive maneuvering of the platform attitude, so that the visual axis of each observation point points to a 0 degree synchronous belt area. The observation view field of the multi-satellite observation system forms a gap-free observation screen covering the GEO zone by 360 degrees in real time in the GEO area, the track of the GEO target can be completely covered by the gap-free observation screen, and the observation method enables the traversal observation period of high-orbit space debris and the target to enter the minute-level magnitude.

The invention provides an agile remote sensing satellite multi-target in-orbit observation method, which comprises the steps of acquiring longitude and latitude information, observation weight and observation starting point information of multiple targets as input conditions of task planning; during forward observation, combining several continuous targets in forward observation into a forward observation sequence so as to form a plurality of forward chains; during backward observation, combining several continuous targets in backward observation into a backward observation sequence so as to form a plurality of backward chains; according to the earnings after different forward chains and backward chains are combined, determining a combination of the forward chains and the backward chains by combining the attitude maneuver cost generated in the observation direction, adjusting the number of targets on the forward chains or the backward chains according to the combination of the forwardchains and the backward chains, calculating a switching point of the combination, forming a complete observation sequence in the transit period, and completing task planning.

An induced polarization sounding multichannel observation method belongs to the technical field of an observation method. The invention particularly relates to an induced polarization sounding multichannel observation method and provides an induced polarization sounding multichannel observation method which has the advantage of high field data acquisition efficiency. The method comprises the following steps: 1), placing a power supply electrode as an infinite distance electrode at a position quite far away from a well head, placing other power supply electrodes and measuring electrodes into a well, and performing power supply and measuring in the well from the bottom to the top; and 2), finishing measuring a first depth measurement point, and the power supply electrodes and the measuring electrodes integrally moving upwards by one point position; and finishing measuring a second depth measurement point, continuing to move upwards by one point position, then continuing power supply and measuring, and repeating the previous procedures until the measurement of the whole well is finished.

The invention discloses a high-orbit target approaching observation method based on finite time constraint. The method comprises: determining the relative position relation between a high-orbit service spacecraft and a target spacecraft; determining an approaching mode, an observation moment and an observation position; calculating the relative longitude drift rate, the orbital transfer amount andthe orbital transfer moment; the high-orbit service spacecraft realizing the rounding and floating of the orbit through twice orbital transfer; calculating a traversing moment set of the high-orbit service spacecraft traversing the target orbit plane; calculating an included angle between the orbit plane of the high-orbit service spacecraft and the target orbit plane; selecting an intermediate moment of the crossing moment set to carry out orbital transfer on the high-orbit service spacecraft, so that an orbital plane of the high-orbit service spacecraft coincides with a target orbital plane;and the high-orbit service spacecraft running on the new orbit after orbital transfer for 12 hours before a preset observation moment; and the high-orbit service spacecraft reaching a predetermined observation position through one-time orbital transfer. According to the method, the problems of non-standardization and complex illumination condition constraints of the current approach process method are solved, and the development of subsequent high-orbit observation tasks is supported.

The invention discloses a water vapor observation method based on a navigation satellite system. The method comprises the following steps: receiving satellite data of the navigation satellite system;receiving meteorological data of a meteorological observation instrument; processing the satellite data and the meteorological data, and obtaining delay data; establishing a weighted average temperature calculation model; calculating the delay data through the calculation model, and obtaining a calculation result; and inverting the calculation result, and obtaining water vapor data. Compared withthe prior art, the method has the following beneficial effects: the station acquires the real-time water vapor product of each epoch based on epoch-based real-time water vapor processing of a single station, so that the time resolution of water vapor observation can be greatly improved, and the product service efficiency and capability are greatly improved; batch data processing of a data center is replaced by single-station processing, so that the data processing efficiency is greatly improved, and meanwhile, the transmission cost of GNSS original data transmitted from a station to a centralstation is greatly reduced.

The invention belongs to the field of coal and rock mass mechanics, and in particular relates to an omnidirectional dynamic observation method for an overall process of crack propagation during uniaxial compression in coal and rock mass, which is a supplement to the existing crack propagation observation method, and is suitable for omnidirectional dynamic observation for an overall process of crack propagation during uniaxial compression in coal and rock mass. The invention aims to provide an omnidirectional dynamic observation method for an overall process of crack propagation during uniaxial compression in coal and rock mass, and finally realizes the display of the omnidirectional crack propagation at any moment during uniaxial compression in coal and rock mass, which is of great significance to study on the stability of coal and rock mass and the related engineering practice.

The invention discloses an interval practical security domain modeling method, which is based on a regional comprehensive energy system containing renewable energy sources, considers the uncertainty of the renewable energy sources, and adopts an interval mathematical method for processing; by combining engineering practice, and based on the N1 security criterion of the regional comprehensive energy system and the load of an energy hub output side pipeline section, the method establishes an interval practical safety domain model of the regional comprehensive energy system containing renewable energy, further establishes an interval practical safety boundary model, and proposes an interval practical safety distance model and an interval maximum energy supply capacity model. On the basis, a system dimension reduction observation method and a full-dimensional observation method are established, and the safety of the regional comprehensive energy system containing renewable energy sources can be accurately and quickly analyzed.

The invention discloses a geothermal well water level observation device and method. The device comprises a connecting piece and supporting pieces vertically fixed to the two sides of the connecting piece, a winding roller is horizontally and rotationally installed between the two supporting pieces, a sleeve rope is evenly wound around the winding roller, and a hanging rod is fixed to the end of the sleeve rope. A plumb bob used for ensuring that the sleeve rope unwound from the winding roller is straightened is fixed at the lower end of the hanging rod; a servo motor is used for simultaneously driving the winding roller to rotate and driving the guide assembly to guide, so that the sleeve rope can be uniformly wound on the winding roller, single-layer winding of the sleeve rope on the winding roller is ensured, and the measurement precision is improved; after the floating assembly touches the liquid level of the water level, the servo motor is automatically powered off, and the waterlevel observation height is kept unchanged; after the water level rises, the floating assembly is used for driving the monitoring assembly to act, so that the monitoring assembly sends out different signals and sends water level signals to ground observers.

The invention discloses a device and a method for testing a three-dimensional damage mode of a tunnel face soil body of a cross-river and cross-sea shield tunnel. The device comprises a model box, a transmission device and a testing system, and the model box comprises a main box body (1), a steel support (2) and an excavation module (3). The main box body is composed of a soil filling box (51) and a water tank (52) and installed above the steel support. The excavation module is composed of a model tunnel (31) and a movable baffle (32), located in the soil filling box, connected with the side wall of the soil filling box and used for simulating the displacement mode of an excavation face in the actual shield tunneling process. The transmission device comprises a gear motor (13), a gear set (14) and a screw rod (15), and the operation of the excavation module is controlled through the transmission device. The testing system comprises an x-ray emission device (16) and an observation device (17) and is used for observing the three-dimensional damage process of the soil body. The method comprises the following steps: leveling a field, arranging equipment, preparing a soil sample, saturating the soil body, forming seepage, testing, recording data, cleaning a filling box and repeatedly testing.

The invention discloses a Yangtze estuary bottom sand transport rate measuring system and observation method, and the system comprises a sand collection barrel which is used for being buried in an observation point to collect bottom sand; a weight measuring instrument, used for acquiring the weight of the bottom sand in the sand collecting barrel; a dynamic balance module, used for keeping the sand collecting barrel in a set state; a pressure meter, used for acquiring water pressure in the sand collecting barrel; a waterproof acquisition module, used for acquiring data of the weight measuring instrument, the dynamic balance module and the pressure instrument; a wireless transmission module, used for sending the measurement data to an upper computer; a power supply module providing electric energy for components; and a high-pressure waterproof box, used for protecting all electric components from being damaged and wetted by water pressure. The sand collecting barrel and the sand quilt skirt are combined, and the weight measuring instrument, the dynamic balance module, the data acquisition instrument, the wireless transmission module and the power supply module are combined, so that the problems that a traditional sediment transport amount measuring system is poor in measuring precision, is greatly influenced by terrains and cannot observe the sediment transport amount in real time are solved, and the system is better applied to relevant scientific research projects of hydrological survey.

The application discloses a measure point device suitable for ground surface settlement of a shallow-buried tunnel and an observation method. The measure point device comprises an embedding portion, a bottom plate substrate, a connecting portion, a vertical ruler substrate and a water level, wherein the embedding portion is used for being embedded into a bed rock from the ground surface; the bottom plate substrate is fixedly connected to the top end of the embedding portion; the connecting portion is detachably connected to the bottom plate substrate; the vertical ruler substrate is provided with an upper surface for placing a vertical ruler and is connected to the connecting portion through a leveling device; and the water level is arranged on the vertical ruler substrate and is matched with the leveling device to work, so that the upper surface of the vertical ruler substrate is maintained horizontal. The precision of the measuring operation can be improved.

The invention discloses a measuring and setting method of a hydropower station underground engineering free station setting precision control network. Through arranging the control network, data is observed by an observation method, and various indexes are measured and calculated according to the obtained data in cooperation with an adjustment algorithm and a formula. The method specifically comprises the following steps that a plurality of 360-degree prism devices are linearly and symmetrically distributed on the upstream side wall and the downstream side wall of an underground workshop to form a corner network; special control points are arranged at the two ends of the central axis of the arranged corner network and are matched with a control network formed by a plurality of 360-degree prism devices for observation; a free setting station is selected between the special control points at the two ends, and measurement is conducted through a full-circle corner method; and when processing is carried out according to the observation data, a Helmholtz adjustment algorithm is used as a core, an independent coordinate calculation model of the j observation point of the ith observation station of the free setting station is set, and analysis is carried out through adjustment calculation of various indexes. By adopting the method, a flexible network distribution form is realized, manpower and material resources are saved, the economic benefit is improved, the measurement precision is improved, and the measurement efficiency is improved.

The invention discloses an observation method for coal-bed gas well hydraulically created fracture. The method includes the steps that S1, tracer fracturing fluid is pumped into a coal reservoir, so that the pressure in the coal reservoir is increased to break the coal reservoir to form fracture, and the tracer fracturing fluid enters the fracture and supports the fracture; and S2, after a periodof time, the fracture condition in a section is visually observed by naked eyes and recorded along with the proceeding of underground coal mining work, and a sample of the coal reservoir is collectedso as to evaluate the condition of micro-fracture in the coal reservoir; then a fracturing fracture plane distribution diagram and a fracture 3D distribution diagram are drawn, and the fracturing effect is evaluated; and the tracer fracturing fluid comprises fluorescent tracing sand and a fluorescent tracing agent. According to the method, the fluorescent tracing sand and the fluorescent tracer agent are pumped into the fracture to generate a fluorescent effect, and the fracture can be observed through a direct observation method; the flow conductivity of the fracturing effect and the fractureforming effect in the micro-fracture can be analyzed and evaluated; and the fracturing effect can be evaluated more truly and accurately.

The invention relates to a goaf site high-speed railway subgrade settlement monitoring device. The device comprises a laser signal receiving wall, an automatic level adjusting platform, a laser transmitting port A, a laser transmitting port B, a circuit receiving module board, a laser receiver M and a laser receiver N, wherein a microcomputer receiving control system and the laser receiver M are embedded in the front end face of the laser signal receiving wall; the laser transmitting port B is connected with the ground plane through the automatic level adjusting platform; and the laser transmitting port A, the laser receiver N and the circuit receiving module board are all embedded in the side surface of a train. The settlement observation method comprises the five steps of subgrade observation equipment positioning, laser signal receiving wall construction, train body observation structure assembling, settlement observation and settlement judgment. According to the invention, the purpose of accurate detection of settlement monitoring of a goaf site subgrade is realized on the premise of relatively low cost; and meanwhile, real-time judgment and early warning on an operation state of the train under the condition of uneven settlement in a comparison site are realized.

Disclosed in the present invention is a multi-mode data observation method based on unmanned aerial vehicle formation for semi-airborne electromagnetic surveying. The method includes four basic formation modes: a ZX formation mode for obtaining the Z component of the response field with a high signal-to-noise ratio and the X direction gradient data of the Z component of the response field in different scales; a ZZ formation mode for obtaining the Z direction gradient data of the Z component of the response field in different scales; an XX formation mode for obtaining the X component of the response field with a high signal-to-noise ratio and the X direction gradient data of the X component of the response field in different scales; an XZ formation mode for obtaining the Z direction gradient data of the X component of the response field in different scales.

The invention discloses a method for observing the water level of multilayer underground water. The method comprises the following steps: S1, punching; S2, preparing a pipe; S3, observing a water level; S4, transmitting signals; S5, receiving the signals; S6, arranging data. A visual observation method is adopted, the water pump is used for pumping underground water at different heights for observation, and the height of the underground water level is visually observed. Equipment used in the method is ingenious, the equipment is not easy to damage, manufacturing cost is low, the underground water level observation device is durable in use, a large amount of equipment funds can be saved, popularization and installation of the water level observation device are facilitated, and scientific research funds are saved. The method can observe the underground water level in a circulating mode, cannot damage the underground water level, protects ecology, can observe the underground water level for a long time, collects data, and lays a data foundation for other hydrological scientific researches.

The invention relates to a method for observing settlement of a high-rise building, and relates to the field of building detection. The method comprises the following steps: burying an elevation reference point, a common reference point, an observation working point and a settlement observation point; installing a satellite positioning device and a high-definition camera; performing settlement observation on a building; and calculating the settlement amount, and drawing a settlement curve of each settlement reference point and each observation working point. Therefore, the influence of construction site excavation, bottom surface settlement and ground vibration is effectively eliminated, the elevation datum points can be subjected to joint measurement and mutual inspection so as to be conveniently stored permanently, then people are helped effectively control the whole construction site, and thus the settlement observation result is more accurate.