48results about How to "Realize displacement measurement" patented technology

The invention relates to a displacement measuring device for a movable mutual inductor of an energy balance. The device comprises a double-frequency laser head, wherein a first beam splitter is arranged in the laser beam output direction of the double-frequency laser head; a beam deflector is arranged in the reflected beam direction of the first beam splitter; a second beam splitter is arranged in the transmitted beam direction of the first beam splitter; a polarized beam-splitting prism is arranged in the transmitted and reflected beam directions of the second beam splitter; a corner cube prism is arranged in the transmitted and reflected beam directions of the polarized beam-splitting prism; a light receiver is arranged in the reflected and transmitted beam converging direction of the polarized beam-splitting prism; a laser beam output by the double-frequency laser head is divided into a transmitted beam, a reflected and steered translational beam and a reflected beam having equal light energy through the beam splitter and the beam deflector having different energy transmittances, and the three beams are orthogonal polarized light vertical to a beam transmission direction; and the displacement of the center of mass of the movable mutual inductor is obtained through the displacements of three heterodyne interference measuring light paths. The device has the characteristics of multichannel multiplexing and small signal noise.

The invention relates to a surface plasma resonance-based optical fiber multipoint micro displacement sensing method and device. The surface plasma resonance-based optical fiber multipoint micro displacement sensing device is characterized by comprising a broadband light source, a polarizer, two single-mode transmission optical fibers, a single-mode sensing optical fiber, multiple displacement probes, multiple sensitive areas and a spectrometer, wherein the sensitive areas are multiple areas obtained through corroding the sensing optical fiber; the displacement probes are single-mode optical fibers of which the end face is cut flat and golden films with different thicknesses are plated; an air chamber is an air gap between the displacement probes and the sensitive areas; an evanescent field is formed in the sensitive areas through the sensing optical fiber by light, the plasma resonance effect is generated on the surface of the golden films of the displacement probes; the absorption peak intensity of the resonant wavelength is determined by the length of the air chamber; the golden films with different thicknesses generate different resonant wavelengths, and multi-displacement measurement can be realized through the wavelength demodulation. According to the surface plasma resonance-based optical fiber multipoint micro displacement sensing method and device, disclosed by the invention, the structure is simple, the volume is small, the sensitivity is high and reuse can be realized.

The invention discloses a magnetic suspension type bridge main tower pylon top displacement measurement device, which is mainly formed by a magnetic suspension rail, a shielding sleeve and an adjustable horizontal installation base. According to the device, based on a magnetic suspension principle, the magnetic suspension rail is utilized for providing a constant vertical force for a suspension mass block, so that the suspension mass block is suspended above the rail, a fixed point in a main tower pylon top displacement test is formed, the magnetic suspension rail, the shielding sleeve and the base are horizontally move along with bridge pylon top displacement, and the bridge pylon top displacement can be obtained through measuring the change of a relative horizontal distance between the suspension mass block and the shielding sleeve. The magnetic suspension type bridge main tower pylon top displacement measurement device provided by the invention is applied in the bridge main tower pylon top displacement test, so that an external fixed point has no need to be set, and the absolute displacement of a bridge main tower pylon top can be accurately measured; the dynamic measurement of the pylon top displacement can be realized, and the device can be widely applicable to the technical fields of bridge load tests, health monitoring and the like. Accordingly, the inventor also builds a corresponding measurement method.

The invention discloses an axial center alignment method for a steam turbine, and the method comprises the following steps: S1, collecting circumference values and end face values of all pair wheels; S2, importing axial design data; S3, designing an axial center alignment calculation interface; S4, enabling an output region with an input region and an adjustment region to be correlated through a computational formula, and enabling a conclusion region to be used for listing logic relations of openings and circumferences of all pair wheels with all pair wheel values corresponding to the output region; S5, adjusting a bearing bush value in the adjustment region so as to eliminate an axial center error; S6, recording the adjustment values of all bearing bushes when the axial center error is less than an axial center error critical value; S7, adjusting all bearing bushes according to the recorded adjustment values of all bearing bushes, thereby completing the axial center alignment. The method builds a new axial center alignment platform to improve the axial alignment efficiency through employing axial center alignment calculation software, greatly saves the labor and time, is high in efficiency, and is quick and convenient.

The invention discloses a corrugated pipe azimuth adjustment displacement detection device and a method thereof. The device comprises a frame, wherein a distance laser sensor and an industrial robot are arranged on the frame, a power supply and a USB cable of the distance laser sensor and the industrial robot are connected to an industrial personal computer, the industrial personal computer is connected with a computer, the frame is provided with a transverse displacement driving device and a longitudinal displacement driving device, wherein the longitudinal displacement driving device transversely moves under the drive of the transverse displacement driving device, a corrugated pipe is arranged on the longitudinal displacement driving device, the corrugated pipe longitudinally moves underthe drive of the longitudinal displacement driving device, the corrugated pipe is connected with the longitudinal displacement driving device through an electric extension rod, and three electric extension rods are installed in an equilateral triangle at equal intervals. According to the invention, displacement measurement can be realized from different azimuth angles by controlling the positionsof the corrugated pipe and the laser sensor, thereby the cost is low, and the detection method is more comprehensive.

The invention relates to an anti-slide pile-transparent soil slope system test device based on PIV and a close scene photography technology and a deformation measurement method, and belongs to the technical field of geotechnical engineering. The test device comprises an optical vibration isolation system, a model system, a loading system, a traditional measurement system, a PIV measurement systemand a close scene photogrammetry system. The model system and the loading system are arranged above the optical vibration isolation system; and the PIV measurement system is arranged on the side surface of the model system and used for measuring the internal displacement and deformation of a model, and the close scene photogrammetry system is erected on the upper part of the model system and usedfor performing three-dimensional space displacement and deformation measurement of the external slope surface of the model. According to the test device, through the measurement of displacement and deformation field of slice at any position inside and space displacement field of the external slope, the three-dimensional space deformation and displacement field of anti-slide pile-slope system are obtained; test research of all types of pile-soil systems can be realized; and the measurement effect is superior to that of a traditional displacement meter, and meanwhile, only the combination of close range non measurement camera and scale can be used to measure the displacement of the characteristic points on the slope.

The invention discloses an ICF (inertial confinement fusion) target assembly parameter measuring multi-freedom degree precision motion platform device. The ICF target assembly parameter measuring multi-freedom degree precision motion platform device comprises four parts, namely an ICF target parameter measuring three-dimensional translation system, an ICF target parameter three-dimensional monitoring system, an ICF target attitude double-rotation precision adjustment system and a vibration isolating platform for bearing the former three systems, wherein the ICF target parameter measuring three-dimensional translation system, the ICF target parameter three-dimensional monitoring system and the ICF target attitude double-rotation precision adjustment system are mounted on the vibration isolating platform in a delta form. Through combination with a high-precision air-floating guide rail and an air-floating shaft system and structural optimization and integration, high-precision adjustmentof ICF target space attitude is achieved; the designed motion platform with the ability of outputting target coordinate parameters completes precision adjustment and control of the overall target space attitude through cooperation with other projects, so that measurement of geometric quantities such as the size and the shape accuracy of microspheres, microcylinders and ICF target assembly parameters can be achieved.

This invention refers to an active magnetic suspension axial performance tester, comprising a base component, a suspending plate component, a middle plate component, a sensor, a torquer. The base component is the four-pillar frame type structure. The suspending plate component is mounted in the frame by means of elastically suspending. The middle plate component is elastically supported on a base plate of the base component. The sensor and the torquer are mounted on a mounting bracket of the base plate of the base component. This magnetic suspension axial performance tester can realize the force measurement, with measuring precision of more than 0.5$%, can realize the shift measurement, with measuring precision of +(-) 0.001 mm. This invention can realize the measurement of the position signal voltage so as to realize the measurement of the axial magnetic suspension axial performance, such as the determination of the working capacitor C0, the measurement of the current quality factor Q and the measurement of the shift amount of the magnetic suspension three centers (geometric center, force center and signal center).

The invention discloses a horizontal type bidirectional deformation monitoring system. According to the system, a large casing pipe and a small casing pipe are matched and connected with each other for forming a sleeve group; multiple sleeve groups are in connection end to end; the large casing pipe is provided with a large casing pipe chute; one end of the small casing pipe is in slip connection with the large casing pipe in the same sleeve group by being positioned by the large casing pipe chute, and is provided with line distribution disks, and each line distribution disk is provided with multiple line-distribution-disk line distribution holes; the other end of the small casing pipe is fixedly connected with the large casing pipe of a subsequent sleeve group via a connection ring; line bodies and the line distribution disks are in one-to-one correspondence, and the end of each line body is fixedly connected with the line-distribution-disk line distribution hole of the corresponding line distribution disk; and other line bodies penetrates the other line-distribution-disk line distribution holes of the line distribution disk. The beneficial effects comprise that the system is capable of monitoring the settlement or rebounding deformation statuses at different height in soil, has a wide range, realizes displacement type measurement because soil deformation can be reflected to the end via the line bodies, and satisfies wide-range monitoring demand.

The invention provides a shield tunneling machine cutterhead wear on-line measurement method, which utilizes a foam hole in an existing shield tunneling machine cutterhead, can realize on-line measurement through a hydraulic oil cylinder, a pressure sensor and a displacement sensor, reduces personnel pressurization construction, is simple in measurement device, is convenient for mastering the wearamount of a cutter at any time, and avoids delaying a construction period.

The invention relates to an optical displacement sensor device and a measuring scale with the same, and belongs to the technical field of measurement. The optical displacement sensor device can be used to measure a transparent solution and satisfy the requirement of high precision. The optical displacement sensor device comprises a light source part and an imaging part, the light source part comprises a monochromatic light source and a collimating lens, the collimating lens changes light emitted by the monochromatic light source into parallel light, the imaging part comprises an imaging lens,a diaphragm and a CCD sensor arranged sequentially, the CCD sensor converts a received optical signal into an electric signal for displacement measurement, and a sealed cover is arranged outside the light source part and the imaging part. The measuring scale with the optical displacement sensor device comprises a static ruler and a moving ruler, the moving ruler comprises the light source part arranged at one side of the static ruler and the imaging part arranged in the other side of the static ruler, or the light source part, a semi-reflective semi-transparent mirror and the imaging part arranged in the sealed cover, and the moving ruler is arranged over the static ruler.

The invention discloses a folding-fabry-perot-cavity-based absolute distance measurement method and a device, and belongs to the field of laser interference precise measurement. The method comprises the following steps of: dividing incident intrinsic light into two beams of orthogonal polarized light; performing up frequency shifting and down frequency shifting on the two beams of orthogonal polarized light respectively by an acousto-optic variable frequency shifter respectively to form orthogonal polarized light beams with frequency difference; making the orthogonal polarized light beams enter a folding fabry-perot cavity; and performing resonance on the orthogonal polarized light beams with the frequency difference and an adjacent resonance order of the folding fabry-perot cavity respectively, wherein the frequency difference of the adjacent resonance order is a free spectrum range corresponding to the cavity length of the folding fabry-perot cavity and thus, measuring the absolute distance of the cavity length of the fabry-perot cavity according to the free spectrum range. The device for implementing the method can realize nanometer level measurement precision and magnitude measurement range of dozens of millimeters, and is suitable for nonlinear error calibration of nanometer and sub nanometer precision in the magnitude measurement range of dozens of millimeters and a nanometer displacement measurement system with high precision and a wide range.

The invention belongs to the field of helicopter comprehensive tests and relates to a displacement measuring device for a helicopter rotor damper. The device includes: a mounting bracket, a first cassette, a second cassette, a displacement sensor, and a ram baffle, wherein the mounting bracket is arranged on the damper; the ram baffle is arranged on the rotor; the displacement sensor passes through the first cassette and the ram baffle The two cassettes are fixed on the support; the first cassette and the second cassette respectively fix the two ends of the displacement sensor, and the ejector bar baffle is perpendicular to the measuring end of the displacement sensor. The device is capable of measuring the displacement of disc dampers and helicopter rotors.

The invention discloses a multidirectional displacement measuring device, which relates to the technical field of displacement measuring devices, and comprises a first connecting piece, a second connecting piece, an angle measuring assembly and a displacement meter, wherein the first connecting piece and the second connecting piece are fixedly connected to a measured object. The angle measuring assembly is fixedly connected with the other end of the displacement meter, when a structure is displaced, the displacement amount generated in the length direction of the displacement meter can be obtained through the displacement meter, and the rotating angles of the displacement meter on the vertical plane and the horizontal plane are obtained through the first angle sensor and the second angle sensor. Displacement of the structure in multiple directions is obtained through simple conversion, and multidirectional displacement measurement is achieved. Because the other end, connected with theangle measurement assembly, of the displacement meter has degrees of freedom in the vertical direction and the horizontal direction, when the displacement direction of the measured structure object isinconsistent with the length direction of the displacement meter, the other end of the displacement meter can change the spatial position under the displacement effect of the structure object; and shearing force damaging the displacement meter is prevented from being generated on the displacement meter.

The invention provides a displacement measurement method. The method comprises the following steps: carrying out coding on a first component, wherein light irradiated to the coding can be diffracted so as to form a diffraction fringe; setting a corresponding relation of a code value of the coding and an absolute position; when the coding on the first component receives light irradiation, scanning the light after being diffracted by the coding on the first component so as to acquire a first signal; decoding the first signal so as to acquire a current absolute position of the first component; analyzing absolute position changes of the first component so as to acquire a displacement of the first component. Through the light, displacement measurement is realized; measurement precision is high and a displacement measurement effect is good.

The invention discloses an automatic reservoir surveying and mapping system for surveying and mapping geographic information, which comprises a linear conveying mechanism, a rotating mechanism and a measurement executing mechanism, and is characterized in that the linear conveying mechanism comprises a cement engine base fixedly arranged on the top surface of a water dam, a mounting base fixedly arranged on the top surface of the cement engine base, and a feeding oil cylinder fixedly arranged on the mounting base; a vertical plate of the L-shaped plate is adsorbed on the end surface of the annular electromagnet; the rotating mechanism comprises a hydraulic motor and a rack, the hydraulic motor is fixedly arranged on the top surface of a horizontal plate of the L-shaped plate, the left end of the rack is welded to an output shaft of the hydraulic motor, and a linear driving mechanism is arranged on the rack; and the measurement executing mechanism is arranged on a moving part of the linear driving mechanism and comprises a stand column, a lifting oil cylinder and a pitching machine shell. The method has the beneficial effects that the displacement of the reservoir bottom can be measured, the mountain displacement measurement efficiency is improved, the method is suitable for measurement in severe weather, and the working intensity of survey personnel is relieved.

The invention discloses a laser displacement measurement device and method. The device comprises an interference measurement module, a laser light source module, a signal modulation module, a control processing module and an optical vernier demodulation module. The control processing module controls the signal modulation module to apply a light source modulation signal to the laser light source module, so that the laser light source module provides two beams of laser with fixed frequency difference to the interference measurement module; the control processing module controls the interference measurement module to carry out interference measurement, and during measurement, laser respectively interferes in two Fabry-Perot cavities in the interference measurement module and is respectively detected by two photoelectric detectors to form main and auxiliary measurement interference signals; the optical vernier demodulation module demodulates the main and auxiliary measurement interference signals obtained by the interference measurement module, and the demodulation result is calculated through the control processing module to obtain the measured displacement. The device has sub-picometer resolution and can be used for wide-range high-precision measurement of displacement.

The invention relates to a method for measuring the displacement of an oscillation piston. The method comprises the steps that: a hole is formed in a non-working area of a case (1) in a direction perpendicular to the axis of the case (1), a gap is filled with light-transmitting glass (5) after the hole is formed, sealing is conducted through a sealant, and the sealing performance of the case is guaranteed; a piston displacement leading-out piece (3) is fixed on the non-working surface of a piston (2) by adopting silica gel, and the piston displacement leading-out piece (3) is perpendicular to the surface of the piston (2),and the piston displacement leading-out piece (3) is positioned between the light-transmitting glass (5) and the central point of the piston; and a laser vibration meter (4) is vertically arranged outside the light-transmitting glass (5), and a light-emitting mechanism of the laser vibration meter (4) and the central axis of the light-transmitting glass (5) form a straight line. According to the method of the invention, the displacement of the piston can be indirectly measured by adopting a non-contact measurement method under the condition that the wall surface of the case is not greatly damaged, and the measurement of the displacement of the high-frequency oscillation piston in an aero-engine component test is realized.

The invention discloses a method for testing the interfacial strength of textile fibers, and belongs to the technical field of textile fabrics. Fibers are packaged in an upper sealing colloid, a plurality of lower sealing colloids matched with the fibers in number are arranged, the plurality of lower sealing colloids are limited in a limiting clamp, the other ends of the fibers are packaged in the lower sealing colloids, and resin pouring packaging is utilized, so that the fibers are convenient to fix, and a good fixing effect is achieved. During testing, the multiple fibers move upwards along with the upper sealing colloid, after a trigger mechanism between the lower sealing colloids and the limiting clamp is triggered, displacement sensors are started with the trigger as a signal, the multiple displacement sensors conduct independent displacement measurement on the multiple fibers, and when any fiber is broken in the pulling process, the lower sealing colloid located at the lower end of the fiber falls down, at the moment, a lower contact piece and an upper contact piece at the position are disconnected, and the displacement sensor corresponding to the position stops displacement counting and stores the displacement amount at the moment. The maximum tensile displacement amount can be recorded when a pull test is carried out on multiple fibers synchronously and tested, and the testing efficiency is high.

The invention provides a homodyne one-dimensional grating displacement measuring device, comprising a single-frequency laser, a polarization beam splitting prism, a beam splitting prism, a plane mirror group, a quarter wave plate, two signal receiving units and a signal processing system, wherein the single-frequency laser It is used to emit a beam of linearly polarized light with a fixed frequency, which is incident to the polarizing beam splitter prism for beam splitting, and a beam is reflected to the plane mirror group, which is vertically incident to the diffraction grating through the 1 / 4 wave plate, and diffracted by the diffraction grating to generate diffracted light, which is passed through the plane mirror group, The 1 / 4 wave plate and the polarizing beam splitting prism are incident on the beam splitting prism; the other beam is symmetrical with it to generate diffracted light, and the two diffracted beams interfere to form the interference light after being split by the beam splitting prism and enter the two signal receiving units respectively. The invention can not only realize the straightness measurement of large stroke, but also realize the displacement measurement of four times subdivision of single diffraction, and can realize the displacement measurement of eight times subdivision by using right angle prism or corner prism.

The invention discloses a displacement detection system based on an asymmetric interference structure and a detection method thereof. The system comprises a detection light source, an optical module,a displacement monitoring module and a photoelectric detection module, wherein the optical module comprises a first port, a second port and a third port; the first port is connected with the detectionlight source; the third port is connected with the photoelectric detection module; the displacement monitoring module is fixedly connected with a to-be-detected object; and the displacement monitoring module is of a stepped structure comprising a first reflecting surface and a second reflecting surface. Through the optical module capable of realizing the function of an optical fiber circulator and the displacement monitoring module with a stepped structure, the stepped structure reflecting surface reflects the light to return to the second port and superposes the light with the reflected light of the end surface to form an interference signal, the displacement information of the to-be-detected object is obtained by analyzing the interference signal, displacement measurement in the direction parallel to and perpendicular to the end face of the second port can be achieved, and therefore the application range of the displacement sensor based on the optical structure is widened.

The invention belongs to the field of helicopter comprehensive tests, and relates to a helicopter rotor damper displacement measuring device. The device comprises a mounting bracket, a first clampingbelt, a second clamping belt, a displacement sensor and an ejector rod baffle, wherein the mounting bracket is arranged on a damper; the ejector rod baffle is arranged on a rotor; the displacement sensor is fixed on the bracket through the first clamping belt and the second clamping belt; the first clamping belt and the second clamping belt are fixed at the two ends of the displacement sensor respectively; and the ejector rod baffle is perpendicular to the measuring end of the displacement sensor. The device can measure the displacement of the disc type damper and the helicopter rotor.

The invention provides an online measuring device of cutterhead abrasion of a shield tunneling machine. The online measurement can be realized by using foam holes in a cutterhead of an existing tunneling machine through a hydraulic oil cylinder, a pressure sensor and a displacement sensor; the personnel pressurized construction is reduced; the measuring device is simple; the abrasion quantity of acutter can be conveniently mastered at any time; and the construction period delay is avoided.

The invention discloses an optical fiber displacement sensing system and a sensing method based on a Raman backscattering principle. The method in the specific technical scheme comprises the following steps that 1) an acquisition card converts an analog signal output by a detector into a digital signal, and then performs accumulative average and transverse moving average processing on a Raman backscattering curve to reduce a noise signal; 2) a temperature value iscalculated by using the Stockes and Anti-stockes backscattering signals, and power correction is conducted on the Stockes backscattering signals by using the calculated temperature data; 3) a loss value of the Stockes backscattering signal is calculated, and a displacement loss value of a plurality of Stockes signals at the same position is extracted; (4) loss data of the same position of the plurality of Stockes signals are drawn into a curve, and nonlinear fitting is conducted on the curve to obtain fitting parameters of the curve; and (5) fitting is conducted on the acquired displacement loss data by utilizing the curve fitting parameters, and calculation is conducted to obtain a displacement value of the optical fiber.

The invention discloses a signal carrier device, system and equipment for displacement measurement. The signal carrier device comprises an information storage medium and a displacement measurement code channel formed on the information storage medium, the displacement measurement code channel comprises a relative displacement measurement code channel, and the relative displacement measurement codechannel comprises protrusions and pits which are continuously, alternately and evenly arranged.

The invention discloses a suction force device for automatically testing an electromagnetic brake in a complex application environment. The base is a U-shaped structure, the stator of the electromagnetic brake is fixed on one side of the base, and the mover of the electromagnetic brake is connected to a tension and pressure sensor through a brake shaft. Connection, the tension pressure sensor is fixed on one side of the slide plate through the pressure sensor connection shaft, the front lug support is installed on the other side of the slide plate, the rear support lug support is installed on the other side of the base, and the electromechanical actuator passes through the The actuator connecting bolt is fixed between the front lug support and the rear lug support. The guide rail and the grating ruler are installed on the bottom surface of the base, the sliding plate is vertically installed on the guide rail, the sliding plate can slide back and forth along the guide rail, and the grating ruler is used to measure the displacement of the sliding plate on the guide rail. The invention can automatically test the attraction force of the electromagnetic brake, and compared with the manually operated test device, the test environment is obviously widened.

The invention discloses a horizontal two-way deformation monitoring system. A large sleeve and a small sleeve are connected together to form a set of sleeve sets; several sleeve sets are connected end to end in sequence; Tube chute; one end of the small sleeve is positioned and slidably connected with the large sleeve of the same group of sleeves through the large sleeve chute, and is provided with a distribution plate, and the distribution plate is provided with a number of distribution holes. The other end of the small casing is fixedly connected to the large casing of the next group of sleeves through the connecting ring; each of the line bodies corresponds to one of the line distribution discs, and the end of the line body is fixedly connected to the corresponding one of the line-distributing holes of the line-distributing plate; the rest of the wires pass through the other line-distributing holes of the line-distributing plate. The invention is beneficial in that it can monitor settlement or rebound deformation at different elevations inside the soil; with a large range, soil deformation can be reflected to the end through the line body, realizing displacement measurement; and meeting the demand for large-range monitoring.

The invention discloses an axial center alignment method for a steam turbine, and the method comprises the following steps: S1, collecting circumference values and end face values of all pair wheels; S2, importing axial design data; S3, designing an axial center alignment calculation interface; S4, enabling an output region with an input region and an adjustment region to be correlated through a computational formula, and enabling a conclusion region to be used for listing logic relations of openings and circumferences of all pair wheels with all pair wheel values corresponding to the output region; S5, adjusting a bearing bush value in the adjustment region so as to eliminate an axial center error; S6, recording the adjustment values of all bearing bushes when the axial center error is less than an axial center error critical value; S7, adjusting all bearing bushes according to the recorded adjustment values of all bearing bushes, thereby completing the axial center alignment. The method builds a new axial center alignment platform to improve the axial alignment efficiency through employing axial center alignment calculation software, greatly saves the labor and time, is high in efficiency, and is quick and convenient.