33results about How to "Measurement result influence" patented technology

The invention relates to a circuit for measuring a voltage transformer voltage coefficient, and further relates to a method for measuring the voltage transformer voltage coefficient through the circuit. The circuit for measuring the voltage transformer voltage coefficient comprises a first single-stage voltage transformer (T1), a second single-stage voltage transformer (T2) and a passive linear circuit composed of an isolation transformer (T3). Both the rated transformation ratio of the first single-stage voltage transformer (T1) and the rated transformation ratio of the second single-stage voltage transformer (T2) are equal to K; the rated transformation ratio of the isolation transformer (T3) is equal to 1; a primary low-voltage terminal (X1) of the first single-stage voltage transformer (T1) is connected with a primary high-voltage terminal A2 of the second single-stage voltage transformer (T2); a secondary high-voltage terminal a1 of the first single-stage voltage transformer (T1) is connected with a primary high-voltage terminal A3 of the isolation transformer (T3); a secondary low-voltage terminal x1 of the first single-stage voltage transformer (T1) is connected with a primary low-voltage terminal X3 of the isolation transformer (T3); a secondary low-voltage terminal x3 of the isolation transformer (T3) is connected with a secondary high-voltage terminal a2 of the second single-stage voltage transformer (T2). According to the circuit and method for measuring the voltage transformer voltage coefficient, the effect of shielding errors of a voltage transformer on a series addition line can be overcome, and power frequency voltage addition can be effectively used in a 220 kV high-voltage interval and can even be used in a 330kV-1000kV extra-high-voltage interval.

The invention provides a system for monitoring a liquid temperature and a liquid level. The system comprises a main pipeline, a liquid level detection module, a partition board, and a pressure transmission pipe, wherein the front end of the pressure transmission pipe is immersed into a water tank and the pressure transmission pipe is connected with the partition board in a sealed manner; the liquid level detection module comprises a shell and the shell is internally provided with a deformation membrane, a guide piston and a capacitance assembly; the deformation membrane covers the back open end of a corrugated pipe and the front open end of the corrugated pipe is fixed to the main pipeline; a pressure cavity for sensing liquid level pressure is defined by the partition board, the corrugated pipe and the deformation membrane; the back end of the pressure transmission pipe is inserted into the pressure cavity; the capacitance assembly comprises a fixed capacitance plate fixed on the shell and a movable capacitance plate connected with the shell through a spring; the movable capacitance plate is close to or far away from the fixed capacitance plate under the deformation effect of the deformation membrane; a capacitive reactance between the fixed capacitance plate and the movable capacitance plate is output to a signal processor; and the capacitive reactance is converted into a water tank liquid level by the signal processor. The system for monitoring the liquid temperature and the liquid level, provided by the invention, has the advantages of application to various liquid, no influences on components of liquid to be detected, capability of realizing stepless continuous measurement on the liquid level, and long service life.

Provided are a multi-tooth online detection device and method for precision forging of a straight-tooth conical gear. The multi-tooth online detection device comprises the straight-tooth conical gear, a gear positioning clamp, a positioning clamp rotation mechanism, a base, a lathe body, a vertical sliding platform, a vertical ball screw pair, a horizontal sliding platform, a horizontal ball screw pair, a rotation oil cylinder, a non-contact type laser probe, a laser probe protective cover, a data line and a computer. By adoption of the non-contact type laser probe, the temperature of a workpiece has almost no influence on measurement results. Real-time monitoring of the precision forging effect of the straight-tooth conical gear is achieved through online detection of the chordal tooth thickness, relative height dimension and gear surface defects. The interpolation motion of the vertical sliding platform and the horizontal sliding platform cooperates with the rotation motion of the rotation oil cylinder and the positioning clamp rotation mechanism, online detection of the straight-tooth straight conical gear subjected to precision forging at a high temperature is achieved through the four simple motion mechanisms, and detection accuracy is ensured. The chordal tooth thickness, the forging closed-die height and various gear surface defects of the gear can be detected in a thermal state.

The invention discloses a vertical cylinder liner piston ring friction-wear test device which comprises a motor and an oil supply pipeline. The device is characterized by comprising a friction test device, a heightened clamping jaw, a piston assembly, a positive pressure test device, a chuck base, an oil groove and a heating device. A to-be-tested cylinder liner is cut into three test pieces to be mounted on clamping jaws of an electric centering three-jaw chuck respectively, the clamping jaws clamp the test pieces for radial loading, the friction and lubrication performance of a cylinder liner piston ring is tested through simulation of the load change of the cylinder liner piston ring, and pairing and model selection of cylinder liner piston ring friction pairs are guided accordingly.

The invention relates to the field of fabric performances testing, in particular to a device for testing super-hydrophobic fabric slide angles. The device comprises a sample carrier board, a bottom board, rulers and a hand screw. The sample carrier board is used for holding a sample, one end of the sample carrier board is connected with the bottom board through a hinge, and the other end is a free end. A water tank with one end open is arranged on the sample carrier board. Three round holes are arranged in the bottom board, and a nut is arranged at each round hole. The hand screw drives the free end to rotate around the hinge by using the round holes and the nuts as a lifting mechanism. The two rulers are adhered on the bottom board and are used as a fixing unit and a measurement unit. Water drops are dropwise added on the test sample, the positions that the water drops start to slide or stop sliding are observed by raising or lowering of the sample carrier board, readings on the rulers are recorded, and the fabric slide angles are obtained by calculation. The device is simple in structure, easy to operate, low in cost and high in practicality.

The invention discloses a capacitive tomography sensor applied to the two-phase flow phase distribution measurement of a low-temperature fluid. The device comprises a vacuum insulating pipeline, electrode sheets, a capacitance collection circuit board, a shielding cover, an insulating adhesive layer and a metal flange. According to the device, a vacuum jacket structure is adopted as a sensor measuring section; the electrode sheets are attached onto the outer side of the vacuum jacket; the good heat insulation performance of a low-temperature fluid flowing pipeline is kept, meanwhile, the circuit board can work at a safe temperature; and the low-temperature failure of a measuring circuit is avoided. The capacitive tomography device for the low-temperature fluid can be integrally disassembled and assembled as a modular structure and can be adapted to different measurement pipelines; the capacitive tomography device can be used for a relatively wide temperature section range from room temperature to cryogenic temperature; and a plurality of times of large-range temperature circulation does not influence measurement precision. The capacitive tomography sensor has the advantages of goodanti-stray capacitance capability and good electromagnetic shielding effect.

The invention discloses a liquid level sensor by adopting an optical fiber bundle and an image processing technology. The liquid level sensor comprises a light source, an optical fiber bundle and a camera. The light source comprises a light-emitting element; the optical fiber bundle is formed by a plurality of optical fiber probes with different effective degrees, and the effective length refers to the equivalent vertical length of the optical fiber probes; each optical fiber probe is used for representing different liquid level positions and consists of a transmitting optical fiber and a receiving optical fiber, and the transmitting optical fibers and the receiving optical fibers of the optical fiber probes are arranged in parallel and tightly attached together at the detection ends of the optical fiber probes; at the other end of the optical fiber bundle, all the transmitting optical fibers are converged into a bundle, the end face is processed into a plane perpendicular to the optical axis of the optical fibers, and the illuminating light enters all the optical fibers from the end face; all the receiving optical fibers are collected into a bundle, the end face is processed into a plane perpendicular to the optical axis of the optical fibers, and the camera is used for imaging the end face; when the optical fiber probes are in a working state, the other ends, receiving the optical fibers, of the optical fiber probes entering the liquid present low brightness, and the corresponding ends of the optical fiber probes separated from the liquid present high brightness.

The invention relates to a positive sequence capacitance measuring method for parallel circuits, wherein positive sequence capacitance is measured by utilizing a three-phase experiment power supply and a mutual inductance measuring device. The three-phase experiment power supply is connected with a three-phase conducting wire through three connecting circuits respectively, and the mutual inductance measuring device is connected with the connecting circuits respectively through connecting branches; during measurement, a grounding knife switch at the tail end of the three-phase conducting wire is firstly opened, so that the three-phase conducting wire is insulated from the ground; grounding knife switches at the top end of the three-phase conducting wire are respectively opened, a three-phase high-pressure experiment power supply is applied, a central point of the power supply is grounded, the current of each phase, three-phase circuit voltage and three-phase active power are measured through a current transformer and a voltage transformer, and positive sequence capacitance parameters are obtained through calculation. Compared with the prior art, the method is convenient to use and simple for measurement, and the measuring results of positive sequence capacitance are coincident through detection under the condition that adjacent parallel circuits are at different grounding conditions.

The invention relates to the technical field of thin-film solar cells, in particular to a method for testing the water vapor permeability of a packaging film. According to the method for testing the water vapor permeability of the packaging film, a protective layer is arranged on the packaging film; the packaging film is extruded in two cavities, and a relatively large extrusion force is applied;the extruded position of the packaging film is the protective layer; the protective layer is made of an organic material, so that the problem that a measurement result of the water vapor permeabilityof the packaging film has an error because part of water vapor penetrates through the damaged position due to the fact that the packaging film is extruded to be damaged due to excessively high pressure can be prevented, and the accuracy of the measurement of the water vapor permeability of the packaging film can be guaranteed. Meanwhile, compared with the water vapor permeability of the packagingfilm, the protective layer can be considered to be completely permeable, so that the addition of the protective layer does not influence a test result of the water vapor permeability of the packagingfilm.

The invention belongs to the technical field of agricultural big data, in particular to an illumination intensity detection device for agricultural big data. The device comprises a lighting box and alight intensity detector. The top surface of the lighting box is a transparent glass plate; a transparent box body which is horizontally arranged is mounted in the lighting box; the transparent box body is filled with mixed gas of nitrogen dioxide and nitrogen tetroxide; a photovoltaic panel is mounted at the bottom of the transparent box body; an adjusting cylinder which is vertically arranged ismounted on the side wall of the lighting box; an electromagnet is installed at the bottom of the adjusting cylinder, an induction coil is wound around the electromagnet and electrically connected with the photovoltaic panel, a permanent magnet ring is slidably connected to the inner side wall of the adjusting cylinder, and the upper end of the permanent magnet ring is fixedly connected with the inner top face of the adjusting cylinder through a reset spring. The device can detect the illumination intensity at different heights, facilitates the scientific regulation and control of the plantingdensity and interval of two types of crops, can achieve the automatic dust removal, and avoids the measurement result error caused by the shielding of dust.

The invention discloses a device and method for measuring the air flow of inner cavities of multi-connected guide blades of an aero-engine. The blade inner cavities of the guide blades are isolated through an isolation assembly to form a front cavity and a rear cavity; the guide blade is fixed through the fixing assembly; meanwhile, the shape of the cross section of the front air inlet pipeline is matched with that of the front air inlet, and the shape of the cross section of the rear air inlet pipeline is matched with that of the rear air inlet, so that the influence on the measurement result caused by flow limitation is avoided; compared with the prior art, the flow distribution assembly is used for distributing and conveying flow, the problem of air leakage caused by abrasion of a hose is solved, and the flow measurement efficiency is high. According to the scheme, through mutual cooperation of the isolation assembly, the fixing assembly and the separation assembly, measurement of the air flow passing through the inner cavity of the multi-union guide vane is rapidly and efficiently completed, compared with the prior art, the problems that a hose is prone to abrasion, and flow limiting and air leakage are avoided are solved, and the measurement result is high in accuracy; meanwhile, the passing condition of air flow in a local area can be reflected, and local burning is avoided.

The invention relates to a nuclear power plant conventional island valve fault monitoring device which comprises a valve body, a valve cover and a valve element. An inlet and an outlet are formed in the two sides of the interior of the valve body respectively, a fixing circular ring is arranged on the inlet of the valve body, a filtering sieve plate and a monitoring assembly are arranged in the fixing circular ring, and the monitoring assembly comprises a box body, a distance sensor, a supporting rod, a single-chip microcomputer and an alarming device; a piston is arranged in the box body, the right side of the piston is provided with a distance measuring ball, the distance measuring ball corresponds to the distance sensor, the right end of the supporting rod transversely penetrates through the top of the box body and is connected with the left side of the piston, the right end of the supporting rod is connected with the edge of the filtering sieve plate, the two ends of an elastic piece are fixedly connected with the top of the box body and the filtering sieve plate respectively, and the distance sensor is connected with the single-chip microcomputer; and the single-chip microcomputer is connected with the alarming device. By means of the nuclear power plant conventional island valve fault monitoring device, the problems that an alarm cannot be given out in time when the interior of a valve of an existing nuclear power plant is blocked, workers cannot take corresponding measures in time, serious accidents occur, and the using requirements of the nuclear power plant cannot be met are effectively solved.

The invention discloses an efficient 1-Wire temperature sensor testing tool in the field of temperature sensors, which comprises a workbench, a heat conduction ring is mounted in the middle of the workbench, a heating device is mounted in the heat conduction ring, four heat conduction devices are uniformly distributed on the outer ring of the heat conduction ring, and each heat conduction device comprises a threaded sleeve, a threaded rod, a ball and a disc. The threaded sleeve is installed on the outer circle of the heat conduction ring, a threaded rod extending to the outside of the threaded sleeve is installed in the threaded sleeve and connected with the threaded sleeve through a plurality of balls, the end of the threaded rod is connected with the disc, four installation frames are installed on the workbench and evenly distributed about the circle center of the heat conduction ring, a temperature sensor body corresponding to the heat conduction device is installed in each installation frame, and a positioning device used for fixing the temperature sensor body is installed in each installation frame. According to the invention, a plurality of temperature sensors can be tested at the same time, and the working efficiency is higher.

The invention discloses an electric pole inclination measuring system. The system comprises a supporting plate, a host and a shell, the upper surface of the supporting plate is fixedly connected witha main machine. The shell is fixedly connected to the lower surface of the supporting plate, a mounting plate is fixedly connected to the right side face of the supporting plate, a first bearing is clamped to the upper surface of the mounting plate, a first rotating shaft is sleeved with the first bearing, a connecting rod is fixedly connected to the outer surface of the first rotating shaft, andthe connecting rod is in an L shape. In the electric pole inclination measuring system, a supporting plate, a shell and a pointer are arranged, the support plate is fixed on an electric pole; if the electric pole is inclined, the pointer is perpendicular to the ground due to the influence of gravity, the pointer is not located at the position of the original scale on the shell any more, a worker can calculate the inclination of the electric pole according to the degree between the pointer and the original scale, the weight of the pointer can be increased by arranging the balancing weight, andtherefore the pointer can be quickly perpendicular to the ground, and the accuracy is improved.

The invention discloses an intelligent detection device for detecting the concentration of heavy metal ions in liquid food. The intelligent detection device comprises a shell, a box body is fixed to the outer surface of one side of the shell, a quantifying mechanism is fixed into the shell, a driving mechanism is arranged on the bottom surface of the interior of the shell, and protective shells are rotatably connected to the tops of the shell and the box body. According to the intelligent detection device, when heavy metal detection is carried out on liquid food, a user can open the sealing cover, pour a medicament into the medicament barrel and then reset the sealing cover to transfer the position of liquid medicine, and then the user can rotate the rotating handle to drive the first gear to rotate, and when the first gear rotates, the relative positions of a second through hole formed in the top of the first gear and a first through hole formed in the top of the rubber pad can be adjusted, and the medicine discharging amount of medicine is adjusted through the device according to the fact that the positions of the first through hole and the second through hole are different.

The invention discloses an ultraviolet absorption air chamber assembly which comprises a base and an air chamber assembly detachably connected with the base, the base comprises a lamp holder used forinstalling a lamp source and a connector used for being connected with a light transmission piece, the light outlet end of the lamp holder is detachably connected with the light inlet end of the air chamber assembly, and the light outlet end of the air chamber assembly is detachably connected with the light inlet end of the connector. The air chamber assembly is not directly connected with an optical fiber at the light outlet end, in the process of disassembling the air chamber assembly, the whole disassembling process is simple, cleaning is facilitated, and in the disassembling process, the situation that an optical fiber interface at the light outlet end is damaged or the light intensity of a light source is obviously changed due to light path change is avoided; a direct coupling mode isadopted between the air chamber assembly and the light source, so that optical fibers between the light source and the air chamber assembly is removed, the light source end is prevented from converging the light source into the optical fibers in a complex light condensation mode, and the phenomena of unstable lighting performance, insufficient light intensity introduction and the like caused by aging of the optical fibers at the light inlet end are improved.