87results about How to "Accurate implementation" patented technology

The invention relates to an operating environment sensing based active control system for a boom sprayer, which comprises an outside information sensing module, a running parameter measuring module, an active spray control system module and a running parameter real-time control module. CAN (controlled area network) bus communication of field-operation natural wind speed measured with a two-dimensional ultrasonic wind speed sensor and advancing speed of the boom sprayer measured with a rotary encoder is realized, and spray parameters are calculated through a precision active spray controller. A spray parameter regulating controller is used for acquiring pesticide pressure, fan air volume and spray angle information in real time so as to complete respective PID (proportion integration differentiation) control, and accordingly, the spray volume is guaranteed, drift-reduced spray and fine droplet penetrability are realized, and the effect of settling droplets on plant leaves is improved. The spray system based on external environment sensing and automatic active operating parameter control is high in practical value, simple in structure, convenient in operation and convenient in application.

A defibrillating medical device comprises an electrocardiograph detection device used for detecting an electrocardiosignal, a control device connected with the electrocardiograph detection device and used for receiving a detection result of the electrocardiograph detection device and judging whether treatment is required, a treatment device connected with the control device and used for receiving a treatment command of the control device to conduct automatic external defibrillating treatment when the control device judges that the treatment is required and a transmitting device connected with the control device to transmit a detection result of the electrocardiograph detection device. The detection result serves as pre-hospitable diagnose information. The defibrillating medical device meets the requirement for electrocardiograph detection and diagnosis of a cardiovascular emergency patient not allowing electric defibrillation in pre-hospital care, the electrocardiograph diagnosis is conducted in the pre-hospital care, the patient first-aid time is reduced, good reference is provided for medical workers, and the medical workers can quickly and accurately conduct pre-hospital care on the patient.

The invention relates to a distributed heterogeneous cluster system grouping formation tracking control method and system. The distributed heterogeneous cluster system grouping formation tracking control method and system are provided. Firstly, a bounded initial state of a heterogeneous cluster is determined according to a time-varying vector and state data; determining expected grouping according to the bounded initial state; constructing a formation tracking control protocol under the communication fault according to the second state data and the state estimation value, so that the heterogeneous cluster topology structure can be switched at will, and it can be guaranteed that the control method is accurately and rapidly implemented under the constraint of communication faults; besides, the conservative property is not increased while the control calculation efficiency is greatly improved.

The invention discloses a residual stress measurement system through a hole-drilling method, and belongs to the technical field of material processing and experimental stress analysis. The system comprises two parts: a drilling device and stress calculation software. The drilling device is formed by a speed-adjustable electric hand drill, a tool microscope, a drill rod, a guide cylinder and a magnetic support base and the like; and the calculation software is programmed through C language, and can give residual stress in an assigned direction, or principal stress and included angle in real time. Since a drilling guide device adopts an embedded ball bearing mode, an rotary friction effect of the drill rod is totally prevented; since the support adopts permanent magnetic bases and lock nuts each having a breach, site positioning and fillet weld stress measurement are realized greatly; and since the calculation program takes features of change of hole edge plastic deformation and processing strain with the stress value into consideration, a stress calculation formula of any two vertical directions is given to enable welding residual stress measurement to become much easier and accurate.

The invention provides a portable far-infrared limb vascular puncture auxiliary system. The portable far-infrared limb vascular puncture auxiliary system comprises an infrared emitter, an image pickup system and a monitor; the infrared emitter comprises a plurality of infrared LEDs, an aluminum substrate, a condenser lens, an LED constant current control circuit drive board and two direct current power supplies. More than one infrared LED is welded at the front side of the aluminum substrate; the condenser lens is arranged at the front side of the aluminum substrate; the LED constant current control circuit drive board and female contacts of two direct current power supplies are arranged at the back of the aluminum substrate; the image pickup system is an infrared sensitive video camera provided with an infrared low-light lens; and the image pickup system is electrically connected with the monitor. By using the infrared sensitive video camera provided with the infrared low-light lens, even at severe environment, the invisible infrared radiation light can be sensed and converted into a measurable signal to assist the puncture.

The invention discloses a thoracentesis seat, comprising support legs, a support frame, a seat mounted on the support legs and a backrest mounted on the support frame; the backrest is arranged above one side of the seat. The thoracentesis seat also comprises a lifting carrier plate for lifting the jaw of a human body; the lifting carrier plate is arranged above the backrest in lifting manner. Whenin use, the thoracentesis seat can keep a patient to sit in fixed posture for long time, the position of the patient is kept unchanged, deviation of a focus positioning mark is avoided, surgery can be performed quickly, accurately and safely by medical staff, and surgical risk is lowered. The thoracentesis seat also has the advantages of simple structure, ease of manufacture and low cost.

The invention relates to the technical field of cable fault testing, and particularly relates to a TDR-based anti-interference cable fault testing system. The TDR-based anti-interference cable fault testing system is characterized by comprising a master control module for controlling the system to work, a pulse generation module for sending a single pulse signal to a tested cable, a pulse time interval measurement module for measuring a pulse time interval, a D/A converter for providing comparison reference voltage and a comparator for filtering an echo. The invention further relates to a testing method. The method comprises the steps of (1) providing the comparison reference voltage to the comparator; (2) transmitting the single pulse signal to the tested cable; (3) judging whether a first reflected wave is screened out or not, if not, adjusting the comparison reference voltage and repeating the previous steps until the first reflected wave is screened out; and (5) measuring the time interval between the reflected wave and the first reflected wave and completing measurement. The testing system and the testing method have the beneficial effects that a measurement interference signal can be effectively filtered and a first reflected pulse is accurately determined, thereby quickly determining a cable fault position.

The invention belongs to the technical field of deep learning target detection and computer vision, and particularly relates to a Slim-YOLOv3-based mask wearing condition detection method, which comprises the following steps: acquiring face video data in real time, and preprocessing the face video data; and inputting the preprocessed face image into the trained Slim-YOLOv3 model, and judging whether the user correctly wears the mask or not. According to the invention, through adoption of the Slim-YOLOv3-based mask wearing condition video detection method and an improved unsupervised self-classification method, sub-class division is carried out on data of non-standard mask wearing, so that a mask wearing video detection task can be realized more accurately and rapidly. The proposed network is more concise, so that the application cost is further reduced.

The invention relates to a moving contact vertical motion type high voltage isolating switch capable of detecting the position of a moving contact. The isolating switch comprises the moving contact, a support and an auxiliary switch, and further comprises photoelectric switches and reflecting plates, wherein the reflecting plates are arranged on the moving contact; and the photoelectric switches are arranged on the support. For the specificity of a moving contact motion mode adopted by the vertical motion type isolating switch, angles of the reflecting plates of the isolating switch are accurately computed, and whether double reflecting plates or a single reflecting plate is adopted, the isolating switch can be ensured to accurately and reliably detect the position of the moving contact. The high voltage isolating switch online detects the position of the high voltage contact of the isolating switch in real time by utilizing a photoelectric technology, and has the characteristics of safety, reliability and accuracy in implementation.

The invention belongs to the technical field of medical instruments and particularly relates to an intelligent digital spinal operation device. The intelligent digital spinal operation device comprises a preoperative application system, a physical processing system and an intraoperative application system, wherein the preoperative application system comprises a spinal operation simulation system, the intraoperative application system comprises a spinal operation navigation system, a spinal operation monitoring system and a spinal operation robot system, and the spinal operation monitoring system comprises a neurophysiological monitoring system and an ultrasonic monitoring system. The intelligent digital spinal operation device has the advantages that the problems of large operative wound surfaces, proneness to causing nerve damage and slowness in body function recovery are solved; the intelligent digital spinal operation device is capable of improving operative safety and precision and safety and accuracy of orthopedic operations, saving intraoperative time, reducing operative wounds, achieving operative minimal invasiveness and precision and avoiding large radiation injuries of intraoperative image navigation to patients and operators, and is simple and convenient to operate without extensive training.

The invention relates to a grid-connection control policy for a motor train unit grid-side converter under a network voltage fluctuation working condition. A single-phase VSR rotary coordinate system mathematical model is established based on three-phase VSR rotary coordinate system theoretical basis; the problem of delay of a current control internal model is relieved by adopting a rapid virtual axis algorithm; independent regulation on the active power and the reactive power is carried out separately; the mutual coupling problem of the VSR and d and q components is solved by the design of the current inner loop decoupling control; and the harmonic component in the grid-side current is restrained by adopting a carrier phase-shifting technology. According to the grid-connection control policy provided by the invention, the rotary coordinate system based control method and the rapid virtual axis algorithm are adopted, so that static-error-free tracking for the grid current as well as the independent control on the active power and the reactive power can be realized; the problem of delay of the current loop control existing in the pure virtual axis control method is also solved; the dynamic performance of the system is greatly improved; and the harmonic component in the grid-side current is restrained by adopting the carrier phase-shifting technology.

The invention discloses a method for predicting whether longitude and latitude information of a community is abnormal and relates to a community longitude and latitude measurement technique. The method is based on big data analysis service of a cloud platform, data are automatically acquired and cleaned, communities with abnormal longitude and latitude information are mined with a qualitative analysis method, and accordingly, communities with probably abnormal longitude and latitude information are mined in a concentrated manner by building a model. According to the method, related basic information data are efficiently washed, and requirements of qualitative analysis and modeling data quality are met; multi-dimensional data mining is adopted, and work parameters and data quality problems of adjacent communities are accurately found and analyzed; the work parameters and the adjacent communities are checked regularly, data quality is continuously tracked and monitored, and investment of manpower resources is reduced; the checking accuracy of the work parameters is improved through evaluation and analysis of checking effects of the work parameters, a tracking and analysis mechanism is established, and problems about the longitude, the latitude, a direction angle and data of the adjacent communities can be quickly positioned, and the work efficiency is improved.

The invention relates to a method for quickly detecting total iron grades of hematite concentrates and belongs to the technical field of iron ore detection. The method is used for detecting the total iron grade of hematite concentrates. According to the technical scheme, the method comprises the following steps: grinding the hematite raw ore into different particle sizes and sorting through a spiral chute, thereby acquiring the hematite concentrates in different grades; respectively measuring the true specific gravity of the products of hematite concentrates in different grades by using a pycnometer method; by taking the true specific gravity as a horizontal coordinate and the total iron grades of hematite concentrates as a vertical coordinate, acquiring a relation curve of the total iron grades of hematite concentrates and true specific gravity. In the production process, the hematite concentrates are sampled; the pycnometer method is used for measuring the true specific gravity; the above acquired curve can be utilized to find the corresponding total iron grades; the method is quick, simple and easy to implement; the detection result is accurate and reliable; the detection fees are ultralow; the method can be used for timely directing production; no chemical agent is used, so that the damage of chemical agents to the test personnel and environment is reduced. The method provided by the invention is an innovation in hematite concentrate detection and has obvious economic benefit and social benefit.

The invention provides a concrete crack detection system based on 3D printing and wireless sensing. The system comprises a plurality of 3D printed protective shells which are rotatably connected through steel hinges; the two half sections of each Flex bending sensor are arranged in the two adjacent protective shells respectively; the two protective shells at the two ends of the outermost side arehorizontally arranged on concrete; the protective shells in the middle are obliquely arranged on the concrete in a straight line shape; each Flex bending sensor is connected with a GPRS acquisition system through a connecting cable; and the GPRS acquisition system is wirelessly connected with a wireless signal collection terminal. The invention further provides a concrete crack detection method based on 3D printing and wireless sensing. The concrete cracks and the cracking degree can be detected accurately and conveniently in real time; the long-distance monitoring of the concrete cracks is achieved; the system and the method have the advantages of accurate monitoring result, long monitoring time and convenient implementation; and the concrete damage can be effectively controlled.

The invention provides a cell engineering parameter validation method based on handover proportion iterative analysis, belonging to the wireless network operation and maintenance technology. The method comprises the following steps: 1) aggregating cell engineering parameter data, adjacent cell configuration data and performance data, and constructing a cell multi-dimensional overlapping coverage analysis model; 2) using a handover proportion location method, and in combination with Internet information, using multi-iteration location operation to obtain longitude and latitude of a recommended cell; 3) calculating the longitude and latitude mainly covered by the cell and the longitude and latitude of a base station through the handover proportion location method, connecting the cell position with the base station position to obtain a virtual azimuth angle, further using the method for checking the azimuth angle, discovering and solving antenna inverse connection of the azimuth angle, station model error and single cell azimuth angle abnormity.

The invention discloses an ore blending scheduling method of a strip mine unmanned transportation system. The ore blending scheduling method comprises the following steps: acquiring muck pile information, unloading point information and ore blending target information participating in ore blending; based on the muck pile information, the unloading point information and the ore blending target information, solving a pre-constructed ore blending mathematical model to obtain an ore blending scheme; according to the ore blending scheme, determining the number proportion of muck-pile ore loading cars; and pairing unmanned mine cards of the strip mine unmanned transportation system according to the proportion of the number of the muck pile loading mine cars and the preset information of the shoveling equipment at the muck pile, and generating an ore blending scheduling plan. According to the ore blending scheduling method of the strip mine unmanned transportation system provided by the invention, the ore blending scheduling method which is friendly in interaction, simple and convenient to operate and short in ore blending calculation time consumption, is tightly combined with the unmanned transportation system and supports flexible adjustment and dynamic proportioning is provided.

The invention discloses an animal femoral surgery positioning and fixing device. The animal femoral surgery positioning and fixing device comprises a femoral positioning and fixing table, wherein thefemoral positioning and fixing table is provided with bone holding forceps for clamping an animal femoral shaft, a femoral positioning and fixing panel for fixing the neck of the bone holding forceps,and a fixing bin for fixing a handle of the bone holding forceps; and the femoral positioning and fixing table is used for limiting and fixing the surgical standard position of an animal femur in a femoral surgery, so that a surgical operation platform for a three-dimensional standard image of the femoral surgery is formed. By the animal femoral surgery positioning and fixing device, standardization of a femoral external fixation surgery for implementing experimental models such as femoral fracture, segmental bone defect and distraction osteogenesis can be guaranteed, so that a femoral modelsurgery technology has repeatability and data reliability. The animal femoral surgery positioning and fixing device is assisted by a three-dimensional digital fixing frame as an external fixing frame,and is linked with a synchronous laser marking navigation unit, so that a required large-environment suitable body position for the surgery is provided for a surgical operator, accurate positioning is realized, and meanwhile, a required basic environment is provided for a surgical robot operating system.

The invention discloses a system and method for detecting a turnout and switch point closure of the turnout. The method includes the steps that distance information between a first point rail and a first basic rail is acquired through a first range finder; then, the distance information on the first range finder is read by an information processing device and converted into a switch point closurevalue of the turnout, and the switch point closure value of the turnout is transmitted to a monitoring center, so that an operator accurately obtains the switch point closure state between the first point rail and the first basic rail and can accurately and safely carry out shunting guidance operation, and the running safety of a locomotive on the turnout is greatly improved. Since the first rangefinder is directly arranged on the first point rail or the first basic rail, the first range finder can directly obtain the distance between the first point rail and the first basic rail without inverse calculation operation, so that the operation error caused by input of the obtained switch point closure value is avoided, and the accuracy of the switch point closure value of the turnout is greatly improved.