61results about How to "Simple and reliable measurement method" patented technology

The invention discloses a monitoring method for sedimentation of soft soil foundation and the device. Procedures are that firstly, working reference pile is buried; secondly displacement sensor is installed; thirdly cable is connected; fourthly sedimentation steel plate is set; fifthly displacement is monitored and data are read; sixthly data is processed. Cement sand pile is connected with lower-layer PVC pipe and pre-buried steel plate is embedded at the top of pile. Four clip springs are welt on the pre-buried steel plate. The foundation of displacement sensor is fixed on the pre-buried steel plate tightly by clip springs. The foundation is connected with pull rod. The pull rod mated with spring is connected ball head. The ball head is connected with sedimentation steel plate. Shell, foundation, pull rod, spring and ball head are covered by bellows. The sedimentation steel plate is connected with upper-layer PVC pipe and the foundation of sensor is connected with the cable. After the cable passes through the hole and it is connected with digital display instrument through the cable protective pipe. The invention can not be constrained by construction and weather conditions and can realize quick, accurate, continuous and easy measurement for sedimentation value of soft soil foundation. The measuring accuracy is high and foundation sedimentation after opening for traffic can be monitored for a long time.

The invention discloses a measuring device for mounting angles of blades of an axial flow fan. The measuring device comprises a connecting rod, a reference rod and a measuring long rod are respectively perpendicularly mounted at two ends of the connecting rod, the measuring long rod is perpendicular to a plane consisting of the reference rod and the connecting rod, an indicator is perpendicularly fixedly arranged at one end of the measuring long rod, the indicator and the reference rod are perpendicular to each other, a graduated disc is further perpendicularly mounted at one end of the measuring long rod, is abutted to the indicator and can rotate left and right around a mounting point, the bottom edge of the graduated disc is flat, and graduation values are marked on the graduated disc. During usage, the measuring device has the advantages that a measuring mode is visual, simple and reliable, measurement accuracy is improved, and the mounting angles of the blades of the axial flow fan are effectively ensured to meet designed requirements.

A method for detecting the interface between different two media in the liquid environment, such as in oil tank, includes fixing 3 pressure sensor sets vertically onto the measuring device with a long rod at intervals, submerging the measuring device in the liquid to make the lower two sensors in interface of difference kinds of liquid, transmitting the measured analog pressure signals to A/D converter and in turn to single-chip computer, processing, and remote transmission for displaying or printing out the result. Its advantages are easy control and high accuracy.

The present invention discloses a method for monitoring efficient and safe operation of a coal mining face ribbon conveyer. The method comprises: step 1, arranging hardware equipment used for monitoring; step 2, performing data collection and transmission; and step 3, performing data processing and efficient safe and operation control of the ribbon conveyer. The method in the present invention method is simple in steps. Feature point data of a coal flow outer contour is detected by using a laser radar, a real-time belt speed of the conveyor belt is detected by using a rotary encoder, and a coal flow can be efficiently and accurately detected through data analysis processing and calculation on data by a computer. A visual sensor is used for efficiently and accurately detecting a coal contour on the conveyor belt, so that accurate and automatic recognition of large-sized coal on a mining face is implemented. Coal flow detection efficiency is high, and precision is high. A large-sized coal recognition method is simple and reliable, has a small error, is of great significance to efficient and safe operation of an underground coal mine ribbon conveyer, and is easy to popularize and use.

The invention discloses a machining method used for digital control frame cool bender, its characteristics is that it includes the following steps : A, dividing the to be processing frame curve using the constant chord length from the start point of frame machining; B, calculating the chord length Li between start point and each dividing points; C, for the frame curve divided by chord length, calculating the corresponding circular arc camber Hi at the half of the constant chord length; D, for each frame curves, calculating a group of {Li,Hi} data; E, making one group of {Li,Hi} data as the machining controlling quantity when the digital control frame cool Bender operates automatically, the Li is goal feed amount and the Hi is goal camber. The invention also discloses the machining device for realizing the processing method. The advantages of the invention are it gives the piecewise advanceable digital control frame cool bender a simple and reliable measurement method to ensuring the accuracy of frame automatic bending and shaping.

The invention belongs to the technical field of communication, and particularly relates to a skin surface condition detecting method. The method comprises the steps that the relation between capacitor discharge time and a count pulse value is calculated through a capacitive measuring circuit based on voltage/time conversion; the equivalent resistance and equivalent capacitance of the skin surface condition are obtained through reverse-reasoning calculation according to the time period; the moisture content and oil content of the skin surface are calculated according to the equivalent resistance and the equivalent capacitance. According to the skin surface condition detecting method, a detected capacitor can be measured only by being charged and discharged one time through the capacitive measuring circuit based on V/T conversion, and the measuring method is easy and convenient to implement, reliable and high in measuring precision.

The invention discloses an apparatus for measuring the inclination of a tooth cusp. The apparatus comprises a model plate for fixing a tooth model, a position-adjustable clamping box is arranged above the model plate, a plurality of measuring sheets are arranged on the clamping box side by side, and the lower ends of the measuring sheets can move along a direction close to the tooth model, and contact with the tooth on the tooth model. The apparatus for measuring the inclination of the tooth cusp and a standardized measuring method have the advantages of simplicity, reliability, low cost, rapid data extraction speed, and visual property. The apparatus can measure the angle and scale of a sphere or a polyhedral angle, and realizes visual description by using a two-dimensional graph. The apparatus and the standard method established in the invention lay a foundation for subsequent researches of the form of the surface of the tooth.

The invention discloses an offshore wind turbine tower barrel inclination angle and foundation settlement measuring method and terminal. The method comprises the steps of obtaining three-dimensional space coordinates of three points on the same outer circumference of the top of a tower barrel, the three points on the same outer circumference of the bottom of the tower barrel, and a reference pointon a height reference object; marking circles according to the three-dimensional space coordinates, thereby obtaining a first measurement circle and a second measurement circle; obtaining a first circle center and a second circle center according to the first measurement circle and the second measurement circle; obtaining a central axis of the tower barrel according to the first circle center andthe second circle center; carrying out comparison computing on the central axis and a vertical line, thereby obtaining a tower barrel inclination angle; carrying out computing according to the secondcircle center and the three-dimensional space coordinate of the reference point, thereby obtaining vertical height difference; and carrying out comparison computing on the vertical height differenceand initial height difference, thereby obtaining foundation settlement quantity. Rapid and accurate computing can be carried out to obtain the tower barrel inclination angle and the foundation settlement quantity. The measurement method is simple and reliable and is easy to realize.

The present invention discloses a fluorine injection technology stability test method based on a capacitor structure. The problem of the current monitoring of the fluorine injection technology stability is mainly solved. The realization scheme comprises: preparing a fluorine injection capacitor, and measuring the flat-band voltage Vfb(t0) of the capacitor; applying reversal stress with the duration of tk to the capacitor, and performing monitoring and statistics of current I1(t) of the ohmic electrode and the current I2(t) of the gate electrode of the capacitor; and finally measuring the flat-band voltage Vfb(tk-1) and the flat-band voltage Vfb(tk) of the capacitor after applying the stress, and calculating and obtaining the equivalent position d(tk) of an ionization fluorinion in a capacitor barrier layer spacing from the gate electrode. The fluorine injection technology stability test method based on the capacitor structure is easy to prepare a test capacitor, simple and reliable in test method and accurate in test result, and can be used for improving the fluorine injection technology stability and the long-term reliability of a device.

The invention discloses a measurement device based on a frozen soil unfrozen water migration rule. The measurement device comprises a container with openings in two ends, a controller, a plurality ofelectrode patches, a plurality of electrode connecting lines, low-temperature circulators, an upper computer, an external measurement device and a water injection module; the low-temperature circulators are mounted at the two ends of the container with the openings in the two ends, and perform temperature control on a frozen soil sample placed in the container; the controller controls the electrode patches to work and acquires an electric signal for measurement; the electrode patches acquire an input power supply signal or output the electric signal for measurement; the water injection moduleis connected with water injection holes of the low-temperature circulators and is used for injecting water into the container; the external measurement device is used for supplying power to the controller, providing the input power supply signal and acquiring the electric signal for measurement through the controller; and the upper computer controls the electrode patches and controls the low-temperature circulators to work. The invention further discloses a measurement method of the measurement device based on the frozen soil unfrozen water migration rule. The measurement device realizes the measurement of unfrozen water in frozen soil, and is simple and reliable and is convenient to use.

The invention discloses a method for detecting gear meshing nominal clearance, and relates to the technical field of mechanical manufacturing. The method for detecting the gear meshing nominal clearance comprises steps as follows: gears are mounted on gear measurement spindles, the gear measurement spindles and the gears are arranged in semi-circular grooves of support plates of a measurement device respectively, a pair of gears is in a meshing state, one gear measurement spindle is fixed, a first gear measurement spindle is slightly rotated to enable a tooth surface of a first gear to touch one tooth surface of a second gear, and at the moment, reading I is obtained by a measurement dial gauge; then the tooth surface of the first gear touches the other tooth surface of the second gear, reading II is obtained by the measurement dial gauge, and a nominal clearance value of the first gear and the second gear is obtained through subtraction of the reading I and the reading II. Compared with the prior art, the problems of time and labor consumption, inaccurate measurement and higher measurement cost of conventional gear meshing nominal clearance measurement can be solved.

The invention provides a method to measure the phase delay of wide spectra of a crystal, and belongs to the measuring technique of crystalline materials. The invention uses a bromine tungsten-arc lamp which can transmit ultraviolet and visible light as an illuminant, and adopts a double-beam spectrophotometer, a polarizer and an analyzer to continuously measure the transmission spectrum of a uniaxial crystal. In this way, the phase delay of the uniaxial crystal can be got from the transmittivity values under different wavelengths to achieve measurement of multiple wavelengths of phase delay. The invention overwhelms the defect of the traditional electrooptical modulation method, the optical heterodyne method and the Lambda/4 wave plate method and so on that only phase delay of the uniaxial crystal under one single wavelength can be measured. The invention achieves the test of multiple wavelengths of phase delay, and the measuring method is timesaving, laborsaving, simple and reliable.

The invention provides a glass substrate warpage measuring base platform and a glass substrate warpage measuring device and belongs to the technical field of glass substrate manufacturing. The glass substrate warpage measuring base platform is used for carrying a glass substrate to be measured; the glass substrate warpage measuring base platform comprises a base, a test stand, a limiting plate andballs; the test stand is mounted on the base; the base is used for supporting the test stand; the limiting plate is laid on the test stand; a plurality of circular holes are formed in the limiting plate; one ball is arranged in each of the circular holes; the depth of the circular holes is smaller than the diameter of the balls; and the balls are used for supporting the glass substrate. The glasssubstrate warpage measurement base platform can be combined with a laser test head so as to continuously and equidistantly scan the glass substrate in the horizontal direction and vertical directionwith scanning step pitch dynamically adjusted. The measurement method has the advantages of simplicity, reliability, high-accuracy measurement results, low equipment processing difficulty and easinessin maintenance.

The invention provides a self-calibration measuring method of an ultra-wide spectrum pulse amplitude, which is characterized in that a measuring system consisting of a ultra-wide spectrum pulse source, multiple attenuator assemblies and an oscilloscope is used, and comprises the steps of obtaining different measured values on the oscilloscope by connecting to different attenuator assemblies, thereby calculating the attenuation of each attenuator in each attenuator assembly accurately and further calculating the output pulse amplitude of the ultra-wide spectrum source accurately. With the method, the problem that the attenuation of the attenuator with different ultra-wide spectrum pulses is different can be solved, the measuring error due to the fact that the attenuator adopts the frequency domain calibration result can be overcome effectively, the measuring accuracy of the ultra-wide spectrum pulse can be obviously increased, the attenuation coefficient of the attenuator can be calibrated, and more attenuators are used, the measured result is more accurate.

The invention discloses a square wave transformation amplitude measuring device based on self-mixing interference. The device comprises a light source unit, a signal processing unit and a data processing unit, wherein the signal processing unit introduces a hysteresis comparator to process signals so as to output required square wave signals, and the data processing unit searches for turning points for the output square wave signals so as to calculate the vibration amplitude of an object according to the number of fringes in the same inclined direction between adjacent turning points. The invention also discloses a square wave transformation amplitude measurement method based on self-mixing interference. According to the invention, the hysteresis comparator circuit with adjustable upper and lower limits is adopted to perform square wave transformation on an obtained laser self-mixing signal, so that the influence of external noise on the measurement stability and accuracy is effectively reduced. The self-mixing interference principle is adopted with no specific requirement on the coherence of the laser light source, so that the laser has large selection freedom. Meanwhile, the amplification factor of the signal is controllable, the measurable minimum amplitude value can reach a nanometer level, and wide-range real-time measurement is easy to realize.

The invention relates to a position detection device for a maglev vehicle. The position detection device comprises a carrier signal probe, an iron core pulse probe and a vehicle-mounted rotor which are arranged on the maglev vehicle, and multiple sections of measurement assemblies which are sequentially arranged along a ground track. Each section of measuring assembly comprises a stator coil arranged on the track, a traction driving power supply connected with the stator coil in series, a carrier wave generating device connected with the traction driving power supply in parallel and matched with the carrier wave signal probe, and a stator iron core matched with the iron core pulse probe. The vehicle-mounted rotor is matched with the stator coil to drive the maglev vehicle to suspend and move. The device is simple in structure, reasonable in design, capable of being arranged in a segmented mode, capable of reducing cost, quite easy to operate and calculate when used for detecting the position of the maglev vehicle and high in measuring precision.

The invention discloses a measuring method for additive manufacturing powder bed quality. The cylinder bottom of a powder feeding cylinder is controlled by a motor unit to rise by one unit height, thebottom of a forming cylinder is lowered by one unit height, and a powder paving roller moves from the powder feeding cylinder to the forming cylinder to pave a layer of powder to form a powder bed; and the powder paving roller conducts powder paving layer by layer, a light source emitter continuously projects light sources with different pitches onto the surface of the powder bed, a camera is used for collecting images of the light sources, an image processing and display system constructs a three-dimensional shape of the surface of the powder bed through image information collected by the camera, according to the three-dimensional shape of the surface of the powder bed, a mathematical statistics method is used for calculating the mean, the standard deviation, the degree of asymmetry andthe peak value, and then the powder bed quality is represented. The measuring method is simple, reliable and convenient to operate, can quantitatively represent the powder bed quality, and helps to improve the additive manufacturing powder bed quality.