40results about How to "Meet testing requirements" patented technology

The invention relates to a gas chromatographic method for detecting residues of five high-toxic organophosphorus pesticides in different texture soils(loam, clay and sandy soil) so as to realize the qualitative and quantitative detection on the residues of methamidophos, parathion, methyl parathion, monocrotophos and phosphamidon pesticides in the soils. The gas chromatographic method is characterized in that acetonitrile is taken as an extracting agent, and after an extraction solution is concentrated with constant volume and is filtered, the trace analysis is directly carried out by using a gas chromatograph. The gas chromatographic method has the advantages that firstly a chromatographic column has a good separation effect on a target object, the accuracy degree of detection results is high, the reproducibility is good, and the sensitivity of the method meets the detection requirements of the residual pesticides; secondly compared with a GB/T14552-2003 (gas chromatographic method for determining organophosphorus pesticides in water and the soil), the national standard method is easier and more convenient, a pretreatment process of soil samples is simplified, the detection time is shortened, and the cost is saved.

The invention discloses a banana mature period identification method and apparatus based on a deep convolution neural network. The banana mature period identification method based on a deep convolution neural network includes the steps: acquiring the banana images, to be detected, in different mature periods, during the agricultural production and food quality detection process; performing data cleaning and data extension preprocessing on the acquired banana images according to the corresponding mature period; combining with the characteristics of the banana mature period images to be identified, and accordingly designing the corresponding deep convolution neural network structure; taking the preprocessed banana images as the training data, utilizing the deep convolution neural network structure, and training the banana mature period identification model; and utilizing the trained banana mature period identification model to perform an accuracy test on the banana images to be identified, and if the test accuracy does not achieve the application standard, re-training the banana mature period identification model until achieving the application standard. The banana mature period identification method and apparatus based on a deep convolution neural network can avoid errors caused by human factors, can provide guarantee for banana quality detection, and can save a lot of manpowerand material resources.

The invention discloses a piston ring fatigue testing machine and a fatigue testing method. A pedestal is included. A lower end of the pedestal is fixedly provided with a three-phase asynchronous motor. The motor is connected to a camshaft through a belt pulley. A cam on the camshaft and one end of a spring push rod form cam push rod transmission cooperation. A middle portion of the spring push rod and a guide rail form sliding fit. The other end of the spring push rod is connected to a piston ring fixture body. A middle portion of the piston ring fixture body is provided with a sensor. The sensor and a control cabinet are electrically connected. A counter is arranged in the control cabinet. The control cabinet is installed on a top of the pedestal. The structure is simple and operation is convenient. Fatigue lives of eight groups of piston rings can be detected simultaneously. A condition that one piston ring generates an abnormal value during detection is prevented. One range where a data difference can be allowed and accepted is convenient to analyze. A force bearing condition of the piston ring in a fuel engine can be simulated and an effect of detecting whether the fatigue life of the piston ring accords with a design requirement is reached.

The invention discloses a stress-strain prediction method based on machine learning, and belongs to the technical field of detection and prediction. The prediction method comprises the steps of takingthe machine learning as a medium, processing the stress-strain experiment data as input and output of a learning model, selecting a proper algorithm and the corresponding training parameters, training, so that a prediction network is obtained. During the prediction process, the computer is operated to control the loading force of the loading device each time, a demodulator is used for collectingthe measurement data, a data analysis software is used for processing the experimental data, an appropriate learning model is established, the model is trained, and therefore accurate prediction of the strain field of the tested system is achieved. The method is suitable for the stress-strain field prediction of any optical fiber strain sensor detection system, avoids the errors caused by consideration of determination of loading force and pre-tightening force, simplification of the elastic modulus range of a test piece and a complex model and the like, greatly improves the calibration precision, and is convenient and rapid to operate and easy to popularize.

The invention provides a multi-camera reconstruction method based on DLP surface structured light. The multi-camera reconstruction method comprises the steps that a four-eye structured light detection system is built, cameras are calibrated, a PC terminal generates Gray code and phase shift code patterns, a DLP projector is controlled to project, and a level signal triggers the cameras to shoot images obtained after coding patterns are modulated; correcting an image obtained by shooting and carrying out de-noising processing; decoding and unwrapping the de-noised Gray code pattern and the de-noised phase shift coding pattern respectively to calculate a truncation phase, and calculating an absolute phase value by combining the results of the Gray code pattern and the phase shift coding pattern; carrying out stereo matching to obtain point cloud information of the to-be-measured object; filtering the point clouds obtained by the two groups of binocular structured light systems, and preliminarily splicing the two groups of point clouds through rotation and translation transformation; according to the method, the high-precision coding process is completed through combination of the Gray code and the phase-shift code, the coding and decoding accuracy and the final reconstruction precision are improved, and the industrial detection requirement is met.

The invention discloses an FPGA accelerator which realizes unloading and acceleration of a network test protocol in an FPGA by using an accelerator based on the FPGA, and task data does not need to be transmitted to a CPU (Central Processing Unit) for processing when being transmitted and received, so that the load of the CPU is reduced; the FPGA accelerator is high in data processing capacity, the full-bandwidth test requirement can be met, and high-precision measurement is achieved; meanwhile, an application program module in the equipment is built based on an Iperf protocol, and the Iperf protocol can be replaced based on test requirements, so that the expansibility is good; and due to the dynamic programmable characteristic of the FPGA accelerator, a corresponding test environment can be set up at any time according to needs, all operations are only execution of software instructions, hardware board cards do not need to be replaced, hardware connection relations do not need to be changed, and rapid positioning of faults is facilitated. The invention also discloses a network parameter measurement system and method and a readable storage medium, which have corresponding technical effects.

The invention provides application of double-positive imidazolium salt ionic liquid in extraction of a bisphenol compound. Double-positive imidazolium salts ionic liquid comprises one or combination of [C4(MIM)2]Br2 and [C6(MIM)2]Br2. In addition, the invention further provides a micro-extraction technology based on the double-positive imidazolium salt ionic liquid, and an extracting agent is double-positive imidazolium salts ionic liquid with double imidazole rings. An extracting process comprises the steps of adding a to-be-extracted matrix in a centrifugal tube and then diluting the to-be-extracted matrix, then adding the extracting agent in the centrifugal tube to obtain mixed liquid, and regulating PH of the mixed liquid to be 2-6; then adding LiNTf2 in the mixed liquid and then carrying out ultrasonic treatment; and finally, cooling the mixed liquid and carrying out centrifuging treatment to obtain precipitates so as to complete extraction. The micro-extraction method as shown inthe invention has the advantages of simplicity and convenience in operation, time saving ability and high efficiency, and environmental protection. The method is wide in linear range, good in repeatability and low in limit of detection, and is suitable for detecting and analyzing the bisphenol compound in a complicated matrix.

The invention provides a ball dropping testing fixture. The ball dropping testing fixture comprises a base, a fixing part and a locating part, wherein two parallel guide rails and a locating groove parallel to the guide rail are arranged on the base; the fixing part is fixedly arranged at the end of the guide rail and comprises a vertical support, an upper supporting seat horizontally and fixedly arranged at the top end of the support, a clamping base movably connected with the upper supporting seat, and a lower supporting seat fixedly arranged on the upper surface of the base and corresponding to the upper supporting seat; the locating part is movably arranged above the guide rail and comprises a movable support arranged vertically. According to the ball dropping testing fixture, the fixing part and the locating part are arranged on the base, the locating part can move on the base for clamping electronic products with different sizes conveniently, the electronic product can be clamped left and right by the clamping base, and the testing requirement is achieved.

The invention discloses a face recognition clock-in system and method. The face recognition clock-in system comprises a face acquisition module, a light supplementing module, a setting module, a central processing unit, a second image acquisition module, a first image acquisition module and a third image acquisition module. According to the invention, the second image acquisition module, an expression recognition/analysis/comparison module, an expression early warning module and an expression database are arranged, so that when people use face recognition to punch a card, positive expressionsin the expression database are displayed through a display screen and a loudspeaker; and the third image acquisition module, a facial color recognition/analysis/comparison module, a health early warning module and a health database are arranged, so that the health state can be displayed through the display screen and the loudspeaker when people punch cards by adopting face recognition, so that therequirements of detecting facial expressions and human health can be satisfied.

The invention discloses a multistage parallel intensified fixed bed reactor and a using method thereof. The multistage parallel intensified fixed bed reactor comprises a raw material tank, a discharge tank, at least one parallel reaction unit, a circulation pipeline and a circulation pump, wherein each reaction unit comprises a charge pump, a charge heat exchanger, a discharge heat exchanger, a reactor shell and a plurality of fixed bed layer sections installed in the reactor shell; each fixed bed layer section is connected with a charge main pipe via a charge branch pipe; the charge main pipe is connected with the raw material tank; the charge pumps and the charge heat exchangers are arranged on the charge main pipe; each fixed bed layer section is connected with the discharge main pipe via a discharge branch pipe; the discharge main pipe is connected with a discharge tank; the discharge heat exchangers are arranged on the discharge main pipe; one end of the circulation pipeline is connected with the discharge tank, and the other end of the circulation pipeline is connected with the raw material tank; the circulation pump is arranged on the circulation pipeline. The multistage parallel intensified fixed bed reactor is compact in structure, convenient to operate and control, high in reaction efficiency, high in elasticity, convenient to maintain, and is especially suitable for modern large-scale production, and is an upgraded product of the traditional fixed bed reactor.

The invention discloses an extraction method of crocus sativus medicinal material DNA. The method includes the steps of sufficiently grinding dried stigmas of crocus sativus through liquid nitrogen, adding 4*CTAB and phenol-chloroform of the same volume, conducting concentration, adding pre-cooling anhydrous ethanol and NaAc for sedimentation, conducting washing absolute ethyl alcohol, and storing the samples in a refrigerator with the temperature of -20 DEG C for standby application, wherein the volume of the pre-cooling anhydrous ethanol is two times of the volume of phenol-chloroform, the volume of NaAc is 20% of the volume of phenol-chloroform, and the volume of absolute ethyl alcohol is 2.5 times of the volume of phenol-chloroform. A traditional CTAB method is further improved and optimized, and the experiment efficiency is greatly improved. DNA obtained from crocus sativus medicinal materials through the method is high in quality, and the DNA purity meets the requirement for downstream application. The method has the advantages of being efficient, economical, safe and easy and convenient to use for medicinal material drying.

The invention discloses a test instrument capable of monitoring layered settlement, and relates to the technical field of soil monitoring, the device comprises at least two detection mechanisms, the at least two detection mechanisms are detachably connected in sequence in the vertical direction, each detection mechanism comprises an elastic piece, a gravity sensor and a layered plate, the gravity sensor is connected with one end of the elastic piece; one side of the layering plate is detachably connected with the other end of the gravity sensor, the other side of the layering plate is detachably connected with the elastic piece of the adjacent detection mechanism, and the layering plate iron sheet is perpendicular to the extension direction of the elastic piece. The at least two detection mechanisms are sequentially and detachably connected in the vertical direction, so that different numbers of detection mechanisms can be flexibly connected in series according to experiment requirements, the test requirements are met, and the problems of inapplicability, non-universality, difficulty in range change and the like of the layered settlement meter in scientific research experiments are solved.

The invention discloses a Labview-based vehicle body controller automatic detection tool and an automatic analysis method thereof. The detection tool comprises a drive program writing module, a test function module, a combination module and an execution program module which are connected in sequence. The analysis method comprises the following steps of writing a driving program for each piece of hardware equipment used in the automatic detection process of a vehicle body controller according to the equipment type; developing a function module corresponding to an automatic detection jig for a vehicle body control product, calling each test function module, and running the program of each function test; configuring each drive program into a program format which can be called by a vehicle body controller product test function module through Labview; and running the main program, calling the corresponding test function module by the main program according to the actual function requirementof the vehicle body controller test, and calling the configured corresponding VI drive program by the test function module. The tool and a method help a user to develop an automatic detection test and a verification product test of the vehicle body controller more quickly, improve the efficiency and save the cost.

The invention relates to a device for detecting the specific surface area and the aperture of dynamic and static powder, and belongs to the technical field of powder detection. The detection device comprises a static detection part for detecting by adopting a static method; a dynamic detection component which is used for detecting by adopting a dynamic method; and a gas supply component of which the output end is respectively communicated with the static detection component and the dynamic detection component and supplies standard gas to the static detection component and the dynamic detectioncomponent. The detection device has a static detection mode and a dynamic detection mode, the corresponding detection modes can be selected according to needs, the detection cost is reduced, and thedetection accuracy is improved.

The invention relates to an EGR one-way valve opening pressure and opening degree feedback detection device and method. An input flange with an input pressure sensor and an output flange with an output pressure sensor are arranged at the front end and the rear end of a simulation valve body respectively; a side transparent observation window is arranged on one side face of the simulation valve body, a camera is arranged outside the side transparent observation window, a laser displacement sensor is arranged outside a top transparent observation window, and a prismatic simulation valve seat and a reed serving as a valve clack are arranged in the simulation valve body. Opening of the EGR one-way valve reed is simulated through the closed simulation valve body with the transparent window, and the camera and the laser displacement sensor are used for recording various states of action and deformation of the reed, so that various working parameters of the reed are obtained, accurate data are provided for actual use of the reed, and the problems of check valve reed opening pressure detection, reed opening value detection under different pressures and the like are solved. The device is simple in structure, convenient to use and high in detection precision.

The invention discloses rapid face-scanning payment equipment based on a biological recognition technology and an application method, and relates to the technical field of face-scanning payment. A driving mechanism for driving a camera to move in an arc-shaped track is arranged in a shell; the equipment further comprises a shielding part and an auxiliary recognition part, wherein the camera is shielded through operation of the driving mechanism under the action of the shielding part, and hair on a face to be collected is blown away under the action of the auxiliary part. According to the equipment and the method, by making the camera conduct arc-shaped movement, multi-angle recognition can be conducted on the face, the rate of face recognition is increased, meanwhile, a shielding plate extends out, the situation that sunlight irradiates the camera is reduced, the camera is prevented from emitting light, meanwhile, air is sprayed to the face, hair can be blown open, the accuracy of face recognition is ensured, and the practicability is better.

The invention discloses an equipment system testability evaluation calculating method which comprises steps as follows: step A, working principles and characteristics of an equipment system are analyzed, the use demand and testability demand of the equipment system are summarized, a diagnostic scheme and testability requirements are determined, and testability design criteria are established; step B, a comprehensive weighting influence set is established with a comprehensive weighting method according to the influence degree of the testability design criteria relative to the testability requirement; and step C, conditions, according with the testability design criteria, of sub-objects of the equipment system are analyzed with a top-down method, and a testability value is obtained in combination of the comprehensive weighting influence set, so that the testability design of the equipment system are checked and evaluated. According to the equipment system testability evaluation calculating method, the diagnostic scheme and the testability requirements are taken as main evaluation factors, the equipment system is subjected to objective and effective analysis in combination of other requirements of equipment system design and conventional resources, and the method is widely applied in the development process and design identification of the equipment system.