41results about How to "Improve survey accuracy" patented technology

Methods for improving wellbore survey accuracy and placement are disclosed. The Earth's magnetic field may be measured at a magnetically clean surface location and correlated with a non-magnetic reference direction to obtain a direction of the Earth's field (e.g., a magnetic declination or a magnetic inclination). The direction of the Earth's magnetic field may in turn be processed in combination with magnetic measurements made in a subterranean borehole to obtain one or more survey parameters.

A digitalized survey method of wireless communication base station for obtaining its coordinates, the azimuth and altitude of antenna, and the position relative to other base stations is disclosed. Its portable integrated serveying equipment is composed of the measuring instrument including global satellite position instrument, digital compass, digital camera, digital height measurer and digital audio recorder; the data processor consisting of microcomputer and radio emitter; and the data processing center comprising radio receiver and data processor.

The invention discloses an acoustic reflection device and method for detecting pile hole base geological flaws. The device comprises an acoustic detection device, an acoustic emission-reception terminal and a cable. The acoustic emission-reception terminal comprises a base and sensors. The base is provided with a hollow groove. At least two sensors are arranged in the hollow groove. Each one of the sensors comprises an independent acoustic emission-reception function. The sensors are connected to the acoustic detection device through the cable. The method comprises device connection, base plate length adjustment, pile hole base detection, acoustic reflection migration imaging processing and acoustic reflection composite structure diagram interpretation. The device and method are suitable for manual hole digging and mechanical hole digging in slush and solves the problems of personnel construction safety, detection infeasibility because of water filling the mechanical pile hole, large safety hidden trouble of a manual hole digging construction process and low work efficiency.

The invention discloses a large scale crop plant area vehicle-carrying investigation process and a system thereof, which comprises the matching of GPS position information and a GIS map, the matching of GPS position information and images, the decision of crop longitudinal plant width, the storage and extraction of the images, the grid algorism of the images, the identification of crop species, the storage of GPS position information and the various crops plant information and the calculation of various crops plant area and plant quotas. The process and the system can realize the drawing of vehicle navigation and path line through the GPS position information, measure the shooting angle of a camera through a dip angle sensor and control the quadrat width of a sampling, realize the video storage of the sampling and the single-frame extraction of a to-be-identified image through the image collection, and increase the real-time and the accurate ratio of identification through the grid algorism of the images, and automatically calculate the plant areas of various large scale crops through the crop identification. The system provides three ways of hand-held function, automatic functionand the video playback function to calculate the plant area of crops and the plant quota.

The present application discloses a data processing method, survey method and system for fault zone survey. According to the requirements of actual survey accuracy, a plurality of monitoring points are set in the pre-survey area, and the monitoring data of earthquake precursor signals at different times at the monitoring points are monitored. Monitor the occurrence time of the earthquake event within the monitoring time, and collect statistics on the monitoring data in the preset time period before the earthquake event, so as to draw a schematic diagram of the distribution of fault zones in the pre-survey area according to the statistical data. This application innovatively proposes a method for the distribution of fault zones based on correlation analysis of seismic events and earthquake precursor signals, and because the survey method does not need to cause any damage to the surface and buildings near the measured point, it can not only locate fault zones in the field, but also The fault zone can be accurately located in the city and then the survey of the fault zone can be carried out in the city, so the non-destructive survey can be realized while improving the survey accuracy of the fault zone.

The invention relates to a soil organic carbon spatial sampling network design method giving consideration to the non-stationary characteristic of spatial-temporal distribution. The soil organic carbon spatial sampling network design method comprises: firstly, extracting basic data of soil organic carbon spatial sampling network design and carrying out integration; then establishing a regression relationship between soil organic carbon spatial-temporal changes and multiple time series attributes by applying a spatial-temporal regression method, and mapping a soil organic carbon spatial-temporal changing process into a spatial-temporal stochastic process formed by a soil organic carbon multi-factor spatial-temporal regression tendency and a regression residual; finally, constructing a soil organic carbon spatial sampling network design model, using the data as model input data, evaluating a fitness function, establishing a mapping relationship between a sampling scheme design problem and a particle swarm optimization algorithm, and solving to obtain a soil organic carbon spatial sampling network optimization scheme. According to the method, investigation accuracy is greatly improved, meanwhile, rapid convergence and extra-strong optimizing capacity of the particle swarm optimization algorithm are sufficiently played, and reasonability, applicability and design efficiency of a soil organic carbon spatial sampling network are promoted.

The invention discloses a geological survey layout method for deep and shallow combination of underground engineering, comprising: conducting ground survey, forming a survey area geological background report and a geological survey implementation plan; carrying out surface area geophysical exploration, performing engineering geological division, and generating a survey area engineering geological division map , to delineate the geophysical abnormal zone; carry out conventional vertical drilling on the shallow buried section of the underground project, conduct in-situ testing, and take core samples for testing, analyze and judge the engineering geological conditions of the shallow buried section; pre-design the excavation and support of the underground project; Excavate the shallow buried section of underground engineering, conduct advanced geophysical exploration in the cave before excavation; conduct long-distance horizontal drilling, carry out in-situ pressure water tests and take core samples for testing, and analyze the situation ahead of underground engineering excavation; and advanced geophysical exploration Geological data are compared and support design parameters are dynamically adjusted. The invention conducts precise investigation on the geological conditions of the underground engineering, is suitable for underground caverns with different formation lithologies, and has high construction efficiency.

A dual-coil coupled multi-wave exploration system, comprising a transmission control system. A first set of pulse signal output ends of the transmission control system is connected with a master transmitting coil, and a second set of pulse signal output ends of the transmission control system is connected with a slave transmitting coil. The master transmitting coil and the slave transmitting coil are coupled coils and are overlapped in position. A receiving coil module is provided at the edge of the master transmitting coil, and is partially intersected with the master transmitting coil; and the partial orthographic projection of the master transmitting coil is coincide with the partial orthographic projection of the receiving coil module. The dual-coil coupled multi-wave exploration system can realize alternate detection of the deep part and the shallow part, is short in the current turn-off time for the shallow detection, low in loss, high in detection precision and work efficiency, simple in structure and high in mobility; the master transmitting coil and the receiving coil module are intersected partially and thus the mutual inductance influences between the master transmitting coil and the receiving coil are cancelled, so that the exploration precision is improved.

The invention discloses a horizontal geological survey layout method for deep buried underground caverns, comprising: conducting ground survey, forming a survey area geological background report and a geological survey implementation plan; conducting surface area geophysical survey, performing engineering geological division, and generating survey area engineering Geological zoning map to delineate geophysical abnormal zones; conduct long-distance horizontal drilling, and take core samples for indoor geotechnical tests to analyze the situation ahead of cavern excavation; pre-design cavern excavation support; conduct cavern tunnel excavation Excavation, advanced geophysical prospecting in the cave before excavation; deepening blast hole detection to judge the geological situation ahead; comparison with the advanced geophysical prospecting geological data, timely and dynamic adjustment of support design parameters; comprehensive detection results to build a 3D geological model of the underground cavern According to the detected geological conditions, the cavern support design and timely support modification are carried out to ensure the safety of cavern excavation. The invention can accurately survey the geological conditions of the underground cavern, and the construction time is short.