93results about How to "Avoid accidental errors" patented technology

The invention provides a powered parafoil system's air-drop wind field identification method which can dynamically identify the wind speed and wind direction of a wind field that a powered parafoil system flies across so as to provide necessary information for reference to control the trajectory of the parafoil system and the operations for flared landing. The identification process for a wind field is divided into three steps. Firstly, through a GPS module, the positions concerned information of the powered parfoil system can be obtained. Based on the change in the positions of the powered parafoil system, the flying speed and the direction of the powered parafoil system can be calculated. Secondly, the Kalman filtering algorithm is adopted to have the flying speed of the powered parafoil system undergo a filtering process so as to get accurate speed concerned information. Thirdly, the recursive least square algorithm is introduced to online update the identification results of the wind field.

The invention discloses an intelligent balloon. The intelligent balloon comprises a balloon body, a balloon valve, a ballast device, a collecting device and a controller, wherein the balloon valve is arranged on the balloon body and used for deflating the intelligent balloon when being opened; the ballast device is used for releasing ballast; the collecting device is used for collecting environment parameters and flight state information of the intelligent balloon; and the controller is respectively connected with the balloon valve, the ballast device and the collecting device to determine the flight mode of the intelligent balloon according to the flight state information of the intelligent balloon and control the balloon valve and the ballast device according to the flight mode, the environment parameters and the flight state information. According to the invention, the lifting of the balloon can be intelligently controlled and the service life of the balloon can be greatly prolonged so that the balloon can obtain much meteorological data through single flying; the same elevation can be measured for a plurality of times so that the reliability of the measured data is improved; and moreover, the balloon can be controlled to safety and stably land to achieve the purpose of being recycled so that the flight cost is reduced.

The invention relates to a method for measuring nonlinear parameters of an ultrasonic contrast agent. According to the principle of the method, the ultrasonic contrast agent is added in an aqueous medium for micro bubbles, and the micro bubbles change the physical properties of the aqueous medium to cause a significant change in the measured sound pressure amplitude, so that the nonlinear parameters are changed, and the changing situation of the nonlinear parameters is estimated by measuring the change of the sound pressure amplitude. The measuring method is suitable for measuring the nonlinear parameters of a plurality of ultrasonic contrast agents, measurement is convenient, repeatability is strong, and data is easy to obtain and process, second-order nonlinear parameters can be measured, and third-order and high-order nonlinear parameters can also be measured.

The invention relates to a vegetation canopy coverage calculation method and system based on a colorful digital image. The method comprises that the colorful digital image of an area to be calculated is shot vertically; the green characteristic index of each pixel of the colorful digital image is calculated; a Sobel operation is called to calculate a gradient value of each pixel according to the green characteristic index of the pixel, and the green characteristic index of the pixel corresponding to the maximal gradient value serves as a threshold; and the green characteristic index of each pixel is compared with the threshold, the pixels whose green characteristic index is greater than or equivalent to the threshold are attributed to vegetation pixels, the pixels whose green characteristic index lower than the threshold are attributed to non-vegetation pixels, and the vegetation canopy coverage of the area to be calculated is calculated according to the vegetation pixels and the non-vegetation pixels. According to the invention, the vegetation canopy coverage is calculated in high precision, labor force is saved, and the self-adaptability is high.

The invention discloses a prism for a total station. The prism for the total station comprises an upper prism component, a middle connecting component and a lower embedded component, wherein the upperprism component comprises a prism and a prism support, the prism is rotationally connected with the top of the prism support, a prism support level gauge is mounted on the prism support, and a firstfixed upright post is arranged at the bottom of the prism support; the middle connecting component comprises a second fixed upright post, the bottom of the first fixed upright post is connected with the top of the second fixed upright post by virtue of one universal connecting piece, and a screw is arranged at the bottom of the second fixed upright post; and the lower embedded component comprisesa sleeve nut which is used for being matched and connected with the screw, a steel plate sheathes the top of the sleeve nut, and embedded reinforcement is arranged at the bottom of the sleeve nut. Theprism for the total station is simple in structure and reasonable in design, not only is measurement efficiency high, but also an accidental error caused by manual centering can be effectively avoided, and the measurement accuracy of foundation pit monitoring is improved.

The invention discloses a method for determining W parameter of surface runoff pollutant in SWMM software. The method consists of two parts. One is to simulate the erosion of surface sediment with pure water by artificial rainfall under laboratory conditions to form pollutant concentration of surface runoff W0. The other is to consider the natural rainfall water concentration W1 affected by air pollution. By combining the two parts, the determination method of pollutant parameter W of surface runoff under natural rainfall condition is realized. The method solves the problem of determining water quality parameters in SWMM software through the actual runoff data, and combines air pollutants and surface sediment pollutants into urban surface runoff pollution sources to establish a new model of water quality erosion model. Through the method, new SWMM water quality model parameters can be set up in different regions to prevent the errors to the model caused by regional problems.

The invention discloses an automatic monitoring system for high-precision soil frost heaving process, comprising a sample body, a temperature control mechanism, a water supply mechanism, a measuring mechanism, a data collecting mechanism and a seismic isolation bearing, wherein the sample body comprises an organic glass cylinder and a soil sample, the soil sample is placed inside the organic glasscylinder, and the seismic isolation bearing is connected to the bottom of the organic glass cylinder; the temperature control mechanism comprises an incubator, the organic glass cylinder is placed inthe incubator, and a temperature control top plate and a temperature control bottom plate are respectively set on upper and lower sides of the soil sample; the water supply mechanism comprises a water pump, the water outlet of the water pump is connected with a water filling pipe, and the water filling pipe extends through the temperature control bottom plate to the inside of the organic glass cylinder; the measuring mechanism comprises a temperature sensor spirally connected to the side wall of the organic glass cylinder, and a displacement meter disposed above the soil sample, and the temperature sensor and the displacement meter are connected to the data acquisition mechanism. The invention eliminates the influence of mechanical vibration and human reading error on the monitoring result, and deeply reveals the frost heaving mechanism of the soil, and the monitoring result is accurate and reliable.

An intelligent slurry pipe abrasion monitoring system for a slurry balance shield can monitor the state of a slurry pipe in a shield construction process, and therefore abrasion of a pipe wall can bereduced. A pH monitoring device, a pH value blending device, a flow velocity control device, a flow monitoring device and a wall thickness monitoring device are all in signal connection with a data acquisition and processing system; the following actions are executed: when slurry enters the slurry pipe, the pH value of the slurry is measured by the pH monitoring device; if the data acquisition andprocessing system judges that the pH value is not in a reasonable range, the pH neutralizing device is instructed to perform blending; the flow monitoring device is arranged on the downstream side ofthe flow velocity control device and monitors the flow of the slurry pipe and reversely deduces the flow velocity of slurry in the slurry pipe; the data acquisition and processing system judges the change of the flow velocity and instructs the flow velocity control device to adjust the flow velocity of the slurry. The wall thickness monitoring device is used for monitoring the wall thickness of the slurry pipe at a measuring point in real time, and monitored data is transmitted to the data acquisition and processing system, so that risk assessment can be conducted.

The invention discloses a reflux type oil sand oil content and moisture synchronous determination system and a determination method thereof. The device comprises a heating device, an extraction device, a reflux device and a condensation device. The extraction bottle of the extraction device comprises a bottleneck, a first bottle body, a second bottle body and a liquid channel, the second bottle body is placed inside the first bottle body, the bottleneck top of the second bottle body is just located at the bottom of the first bottle body's bottleneck, a U-shaped channel is formed between the first bottle body and the second bottle body, the second bottle body is anon-glued filter cylinder, the bottom of the first bottle body is provided with the liquid channel, a columnar adapter tube is sleeved outside the liquid channel, a gas distribution plate is also disposed between the adapter tube and the liquid channel, and the bottom of the adapter tube is connected to the heating device. The method provided by the invention can respectively determine the oil content, moisture content and solid residue content of an oil sand sample, and avoids the error brought about by direct weighing of solid residue and water mass and then acquisition of the oil content through subtraction method.

The invention discloses a carton strength detection device, which comprises a first supporting plate, wherein the first supporting plate is provided with a PLC (Programmable Logic Controller); the upper end surface of the first supporting plate is symmetrically welded with four supporting columns; the upper end surfaces of four supporting columns are welded with a second supporting plate; the foursupporting columns perform a function of supporting the second supporting plate; a carton body is placed on the upper end surface of the second supporting plate; the rear side of the upper end surface of the second supporting plate is welded with a stand column; the upper end surface of the stand column is provided with an installation plate through bolts; the lower end of the installation plateis symmetrically provided with two hydraulic cylinders; the top ends of the two hydraulic cylinders are provided with a movable platform; and two spacing branched chains are symmetrically installed between the movable platform and the installation plate. By use of the device, the even and high accuracy detection function of the carton is realized, accidental errors which are in the presence in thesingle-point testing of the carton strength are avoided, and therefore, the carton strength detection device has the advantages of being convenient in operation, high in testing accuracy, high in working efficiency and the like.

The invention discloses an automatic assembly production line for elevator brake calipers. The automatic assembly production line comprises a carrying disc conveying device, a brake plate storage mechanism, a brake plate carrying disc feeding mechanism, a disc spring automatic combination mechanism, a first disc spring height measurement mechanism, a shell feeding and shell size automatic measurement mechanism, an adjusting gasket and space ring supply mechanism, a second disc spring height measuring mechanism and a manual final assembly station, wherein the brake plate storage mechanism, the brake plate carrying disc feeding mechanism, the disc spring automatic combination mechanism, the first disc spring height measurement mechanism, the shell feeding and shell size automatic measurement mechanism, the adjusting gasket and space ring supply mechanism, the second disc spring height measuring mechanism and the manual final assembly station are sequentially arranged in the conveying direction of the carrying disc conveying device. According to the automatic assembly production line, the automatic assembly production of the elevator brake calipers is realized, the product circulation process is automatically carried out, manual operation and circulation are not wasted, and the labor force is greatly saved; and the thickness measurement of disc springs, space rings and adjusting gaskets adopts automatic measurement, so that the measurement precision is high, and the installation precision of final products is ensured.

The invention discloses an automatic calibration method for a standard platinum resistance thermometer. The standard platinum resistance thermometer comprises a computer, a precise temperature measurement bridge, a change-over switch, a flexible grabbing device, an annealing furnace, a metal fixed point device, a water three-phase point bottle and a standard platinum resistance thermometer body. During working, thermometers to be detected are arranged in a waiting area according to a numbering sequence, and terminals of the thermometers to be detected are respectively connected with channels of the change-over switch, when verification is started, the computer controls the flexible grabbing device to take out the thermometer from the waiting area and put the thermometer into the fixed point device for temperature measurement, the computer controls the precise temperature measurement bridge to start measurement, judges whether a reading condition is met or not according to a preset judgment criterion and performs automatic reading, and after measurement is completed, the computer controls the flexible grabbing device to take out the thermometer from the fixed point device and send the thermometer to a next waiting area, the operation is repeated till all the measurement work is completed, the acquired data are analyzed and processed by the computer, and a verification original record is automatically generated. The standard platinum resistance thermometer is advantaged in that the whole data collection process is automatic, and manpower is saved.