37results about How to "High reliability of test results" patented technology

The invention discloses a comb plate stress detecting device of an escalator. The comb plate stress detecting device comprises a guide part mounted on a step, a tension meter fixedly arranged on the guide part and a pushing frame movably arranged on the guide part, wherein the pushing frame can move left and right under the guide effect of the guide part; one end of the pushing frame is in contact with the end part of the comb plate; the stress end of the tension meter is fixedly connected with the pushing frame; when the step moves in a direction getting close to the comb plate, the guide part moves in the direction getting close to the comb plate under the driving of the step; under the tension effect of the stress end of the tension meter, the pushing frame abuts against the comb plate; and the tension meter can be used for detecting stress of the comb plate. According to the comb plate stress detecting device, the pushing frame can abut against the comb plate, the guide part can move in the direction getting close to the comb plate along with the step, and the tension meter can accurately detect the size of stress between the comb plate and the step, so that the flexibility of the comb plate can be judged. The detecting device is simple in structure, is convenient in detection, is sensitive in detection, and is high in detected result reliability.

The invention discloses a comb plate stress detecting device of an escalator. The comb plate stress detecting device comprises a guide part mounted on a step, a tension meter fixedly arranged on the guide part and a pushing frame movably arranged on the guide part, wherein the pushing frame can move left and right under the guide effect of the guide part; one end of the pushing frame is in contact with the end part of the comb plate; the stress end of the tension meter is fixedly connected with the pushing frame; when the step moves in a direction getting close to the comb plate, the guide part moves in the direction getting close to the comb plate under the driving of the step; under the tension effect of the stress end of the tension meter, the pushing frame abuts against the comb plate; and the tension meter can be used for detecting stress of the comb plate. According to the comb plate stress detecting device, the pushing frame can abut against the comb plate, the guide part can move in the direction getting close to the comb plate along with the step, and the tension meter can accurately detect the size of stress between the comb plate and the step, so that the flexibility of the comb plate can be judged. The detecting device is simple in structure, is convenient in detection, is sensitive in detection, and is high in detected result reliability.

The present invention relates to a method for detecting mild and moderate fatigue levels of traffic controllers in civil aviation, comprising the following steps: S1: collecting urine samples of traffic controllers in civil aviation, and then preprocessing the urine samples; wherein , urine samples include urine samples before work and after work; S2: Use liquid chromatography-time-of-flight mass spectrometry to separate and detect the pretreated samples; S3: Urine samples after work S4: Compare the screened characteristic biomarkers with the biomarkers related to the fatigue degree of traffic controllers in civil aviation Compare and judge the fatigue degree of traffic controllers in civil aviation. The method for detecting mild and moderate fatigue levels of traffic controllers' teams in civil aviation provided by the invention has simple and convenient operation and high reliability.

The invention belongs to the radar device technology field, particularly relating to a radar test tool. The radar test tool comprises a first support, a second support tool and a fixed flange plate for installing a radar device to be tested; the first support is provided with an installation rack; the fixed flange plate is fixed on the installation rack through a bolt; the first support is positioned above the second support and the first support is connected to the second support through a rotary pin roll; and the first support rotates around the axial direction of the rotary pin roll to realize the fact that an included angle between the surface of the fixed flange plate and a horizontal plane is in a range from 0-90 degrees. That the first support rack rotates around the rotary pin roll enables the test radar device to perform 0-90 degree overturning and thus the test process of the radar device to be tested can be implemented. The radar test tool is simple in structure and low in cost, saves substantial time in testing radar test devices and greatly shortens the development period.

The present invention provides a step-down DC conversion circuit structure, including a BUCK circuit structure, and the BUCK circuit structure includes a first voltage stabilizing capacitor, a second voltage stabilizing capacitor, a first voltage dividing resistor and a first voltage stabilizing capacitor. Two voltage-dividing resistors, wherein the first voltage-stabilizing capacitor and the second voltage-stabilizing capacitor are arranged in parallel to form an accommodating channel, and the first voltage-dividing resistor and the second voltage-dividing resistor are arranged on the The accommodating channel between the first voltage stabilizing capacitor and the second voltage stabilizing capacitor prevents the operator's fingers from touching the first voltage dividing resistor and the second voltage dividing resistor.

The invention discloses lithium ion battery consistency matching method and system, wherein the lithium ion battery consistency matching method comprises the following steps of: A, marking at least one battery, setting the battery on a corresponding test channel and inputting the mark in a database; B, respectively sending two alternating-current pulse signals with different frequencies to the battery and collecting response signals of the battery; C, carrying out data transformation treatment on the collected response signals to obtain Rs, Rct and Rs+Rct of the battery; and D, comparing and screening the differences among the obtained Rs, Rct and Rs+Rct of the battery and inputting battery numbers corresponding to all the screened data into the database. The lithium ion battery consistency matching method provided by the invention is based on the basic electrochemical nature of the battery, so that the operation method is simple, the reliability of test result is high, the method conforms to the practical situation of the battery, the expression is simple and the parameters required by screening are flexible.

The invention discloses an isolating switch simulating an electromagnetic disturbance source, comprising a test transformer, a capacitor voltage divider, an adjustable grounding inductance, a power supply side analog capacitor, a vacuum circuit breaker switch, a discharge ball gap and a load side analog capacitor; the primary side of the test transformer Connect the power supply, the secondary side is connected in series with the capacitor voltage divider; the analog capacitor on the power supply side is connected in parallel with the capacitor voltage divider; The negative terminal of the analog capacitor is connected to ground. The invention can truly simulate the electromagnetic disturbance process and the ground potential rise process generated by the opening and closing process of the isolating switch, and can output a high-intensity electromagnetic field of 1.1 MHz; it has convenient assembly, simple operation, safe test and high precision.

The invention relates to a test device for solar cells, in particular to a solar cell decay machine. The solar cell decay machine comprises a box body and a control cabinet; a rotating motor is arranged on the box body; an output shaft of the rotating motor is connected with a light source located in the box body; a ring-shaped first bracket around the light source is arranged at a position, closeto the rotating motor, in the box body; a second bracket matched with the first bracket is arranged at the end, close to the light source and far away from the rotating motor, in the box body; a plurality of carrier plates around the light source are arranged between the first bracket and the second bracket; one end of each carrier plate is rotatably connected with the second bracket; the other ends of the carrier plates are detachably connected with the first bracket; and a plurality of sucking disks for absorbing solar cells are arranged on the sides, close to the light source, of the carrier plates along the length directions of the carrier plates. The solar cell decay machine is uniform in light source irradiation, high in test effect reliability, large in number number of cells in asingle experiment, and high in space utilization rate.

The invention provides a rapid system model parameter identification method based on a wide frequency spectrum excitation signal, and belongs to the technical field of inertial testing. Firstly, the excitation signal considering the richness of signal frequency spectrum contents is designed, and an overload generated by the excitation signal is within an allowable range by understanding a workingenvironment of inertial instrument testing equipment; and due to the fact that position information is represented by the excitation signal, a first-order derivative and a second-order derivative arecalculated to obtain speed and acceleration, a formula capable of obtaining the time of any frequency and obtaining the frequency of any time for an input signal is introduced, and according to a relation between an initial frequency and a cut-off frequency, the time of arriving at the frequency is determined, and relevant parameters are calculated. The excitation signal is novel in form and highin innovation; and the richness of the signal contents is greatly improved compared with the prior art, so that an actual working state of a system can be restored more realistically, various parameters in the system can be more comprehensively excited, and the reliability of a testing result is improved.

The invention discloses a casing air tightness detection system, which comprises a high pressure unit, a mixing unit and a pneumatic winch unit, wherein the high pressure unit comprises an electric air compressor, an air storage tank and a dry filter , the mixing unit includes a nitrogen generator and a helium cylinder, a first pressure reducer is provided downstream of the nitrogen generator, a second pressure reducer is provided downstream of the helium cylinder, the first pressure reducer and the second pressure reducer The outlets of the mixers are all connected with a mixing instrument, an electric supercharger is arranged downstream of the mixing instrument, and a gas cylinder is arranged downstream of the electric supercharger; the pneumatic winch unit includes a winch control operating system and a secondary gas booster The compressor, the winch control operating system and the secondary gas booster are all connected to a pneumatic winch, a packer is connected to the pneumatic winch, and the thread of the packer is connected to a helium leak detector. The casing air tightness detection system of the invention detects the casing at the well head, and the detection result has high reliability.

The invention discloses a method for calculating the spalling rate of asphalt and aggregates on asphalt pavement, which comprises the following steps: 1) processing asphalt-coated aggregates by using a water boiling method, and calculating the rate of asphalt-coated aggregates after boiling Asphalt spalling rate; 2) Use the water damage sensitivity tester to simulate the real water damage mode of the pavement, calculate the asphalt spalling rate of the asphalt-coated aggregate after dynamic water damage, and fit the spalling rate and water damage after dynamic water damage treatment. The spalling rate after boiling, obtain the relational expression of the asphalt spalling rate after moving water damage and boiled damage; 3) Utilize the temperature, pressure and times of the water damage sensitivity tester to calculate the actual damage period of the asphalt pavement, calculate the actual pavement Spalling rates of asphalt and aggregates at different ages. The invention realizes the quantitative calculation of the spalling rate of asphalt and aggregates under different service life of the asphalt concrete pavement by the water boiling method, is convenient to operate, low in cost, has high reliability of the test result and conforms to the actuality of the pavement engineering.

The invention provides a deep beam test piece for a rock I-II composite fracture toughness test. The deep beam test piece has a rectangular main body. The main body is provided with an opening along a center line in a main body lower end surface thickness direction, and the opening extends into the main body and goes through cutting grooves arranged at the front and rear end surface along a main body thickness direction. An included angle beta of the surface of the cutting groove (2) and the cross section of the test piece main body perpendicular to the length direction is greater than or equal to 0 degree and less than or equal to 60 degrees. The width W of the test piece main body is controlled in a range of 0.5L+ / -0.01L. The thickness B of the test piece main body is 0.4 times greater than or equal to the length L and is greater than or equal to 30mm. L represents the main body length. The invention also provides a rock I-II composite fracture toughness test method utilizing the deep beam test piece. The deep beam test piece has a simple structure, is conducive to rock block processing, and realizes a rock I-II composite fracture toughness test in the whole composite loading zone from the pure I-type zone to the pure II-type zone.