93results about How to "Realize multi-point measurement" patented technology

The invention provides a non-contact multipoint high-frequency dynamic bridge deflection detection method. N laser range finders are arranged below the bridge; a reflection target is arranged at a pier; when the bridge does not suffer from additional load, the laser range finder is opened, a distance L1 of each laser range finder when the bridge does not suffer from additional load is measured, and deflection yi at the bridge position corresponding to each laser range finder is calculated; within a certain measurement range, the n laser range finders are repeated at a time interval of mu second, one end point of the bridge serves as a coordinate origin O, the longitudinal direction of the bridge is X axis, the downward direction perpendicular to the bridge surface is Y axis, an X-coordinate xi of a detection point and the deflection value yi measured in real time are inputted, and integrated coordinate data are fitted to a deflection curve. Non-contact measurement can be realized, and compared with the traditional mode of manually using a dial indicator for detection, remote operation and control can be realized, automation can be realized, and the measurement is more convenient.

The invention discloses a cutter with a function of decoupling the temperature of a turning area. The cutter comprises a turning cutter bar and a blade arranged on the turning cutter bar, wherein two test micro blind holes are formed in the blade and used for accommodating high temperature fiber gratings; one blind hole is positioned under the front surface of the cutter; the other blind hole is positioned in the blade, and the bottom of the blind hole tightly leans against a cutter point; the axis of one blind hole is perpendicular to a cutting edge, the distance between the bottom of the blind hole and the cutting edge is 0.2 to 0.8mm, the distance between the blind hole and the front surface is 0.5 to 1.2mm, and the blind hole deviates from the cutter point by 1 to 1.5mm and is used for testing the temperature distribution of a cutter scrap contact surface; and the distance between the other blind hole and the external surface of the cutter point is 0.2 to 0.5mm, an included angle between the axis of the blind hole and the front surface is 20 to 30 degrees, and the blind hole points to the inside of the blade. The cutter can realize multi-point measurement in the turning micro area, is high in dynamic property, micro area test property, dynamic temperature display property and test accuracy, and can well decouple heat generated in a cutting micro area.

The invention discloses an observation method of foundation settlement based on liquid level difference. A folding hose is buried in the foundation, and a liquid level sensor is placed in the hose and is led out through a lead wire to be connected with a liquid level observation instrument on one side of the foundation. One end of the hose is connected with a one-way valve and fixed on the surface of the foundation, the other end of the hose is connected with a liquid storage tank on one side of the foundation, and liquid is filled in the liquid storage tank. The liquid level sensor in the hose is utilized to measure the change of the liquid level difference, then the liquid level difference between a settlement point where the liquid level sensor is located and the liquid in the liquid storage tank can be converted out, and then the settling volume of the foundation can be calculated out. Additionally, after the measurement, the senor can be completely pulled back for recovery through a soft rope reserved in the hose. The observation method of the foundation settlement based on the liquid level difference is simple in structure, convenient in operation, accurate in measurement, capable of cyclically utilizing the liquid level sensor and low in monitoring cost.

The invention provides a non-contact optical fiber device and method for measuring flows. The device comprises a sensing fiber mounted in a pipeline. One end of the sensing fiber is connected with a grating, an optical fiber, a circulator and a light source sequentially, and the other end is connected with the grating, an interferometer and the circulator. The method includes connecting the grating to two sides of the sensing fiber to form a sensing unit, allowing light emitted from the light source to enter the sensing unit from the front end, converting monitoring vibration acceleration into monitoring optical phase by the grating interferometric technique, performing demodulation processing on phase information by the phase carrier technique PGC (programmed gain control), and realizing non-contact flow monitoring. The device is free of contacting with fluid, interfering with the flow field and electrical measurement, safe and reliable, high in adaptability, and free of being interfered by electromagnet; continuous remote measurement is realized, influences by light fluctuation and temperature changes are eliminated, throttle pressure loss rarely occurs, energy is saved, flows of corrosive fluids can be measured, multi-point measurement can be realized, and the device can be applied in measurement processes with various flows.

The invention relates to a device for detecting fan strain on line based on an optical fiber grating, and belongs to the field of fan blade detection in the wind power generation industry. The device comprises a broad band light source, a circulator, an optical fiber grating strain sensor, an optical fiber grating demodulation module, a data processing module, a warner, a sliding ring, a ground receiving module and a displayer. According to the device, the strain quantity of a blade can be acquired by demodulating and calculating the variation quantity of a central wavelength of the optical fiber grating according to the linear relation between the variation of the central wavelength of the optical fiber grating and the variation of the blade strain, so that real-time and on-line detection can be realized. The device can be used for detecting the strain of a plurality of points of the fan blade in real time on line by using a wavelength division multiplexing technology and has the characteristics of small volume, capacity of marking wavelengths, on-line detection, long-term stability and the like, and is not interfered with electromagnetism.

The invention discloses a novel Pelteobagrus fulvidraco transportation method based on intelligent control. According to the invention, Pelteobagrus fulvidraco is narcotized with anesthetics and placed into a live fish box; the interior of the box body of the live fish box comprises a water body and a boat body floating on the surface of the water body; the interior of the boat body is provided with a core control member which is connected with dissolved oxygen, pH and temperature sensors arranged in the interior of the water body and with vibration, noise and air-quality sensors which are arranged at the exterior of the water body and used for capturing environmental information of the interior of the live fish box in real time; the interior of the water body is also provided with a temperature control device; the boat body is provided with a negative-ion air purifying device; in addition, a terminal device is arranged and used for receiving and processing signals of sensors and controlling the boat body to move; thus, accurate control and adjustment of the quality of water in the transportation process of the Pelteobagrus fulvidraco is realized through evaluation of the transportation water quality of the Pelteobagrus fulvidraco by artificial neural network modeling. The method provided by the invention is unique and practical, realizes reliable and comprehensive informationacquisition, thereby guaranteeing the long-distance transportation safety of the Pelteobagrus fulvidraco.

The present invention discloses a multi-flexible plate vibration detection device and method. The device comprises 2N+1 flexible plates, a linear travel mechanism, a vibration detection mechanism anda control module, one of the flexible plates is located at the central position, the other flexible plates are symmetrically arranged at two sides of the one of the flexible plates, the flexible plates are perpendicular to a horizontal plane and hinged together through a hinge to form a flexible hinge plate, and the flexible hinge plate is arranged on the linear travel mechanism; the vibration detection mechanism comprises two slide projectors, two sets of binocular vision systems and 2N acceleration sensors, each slide projector is configured to project mark points on the flexible hinge plate, each set of the binocular vision systems is configured to detect the mark point area of the corresponding slide projector on the flexible hinge plate, and each acceleration sensor is arranged on thecorresponding flexible plate. The multi-flexible plate vibration detection device and method can reflect the global features of the flexible hinge plate and provide a condition for the active vibration control based on the multiple sensors.

The invention discloses a multi-flexible-hinged-plate rotating vibration detection device and method, and the device comprises two flexible hinged plates, a rotating mechanism, a vibration detection mechanism and a control assembly. The two flexible hinged plates are symmetrically disposed on the rotating mechanism, and each flexible hinged plate comprises 2N+1 flexible plates which are hinged together, wherein each flexible plate is provided with a plurality of mark points through pasting. The vibration detection mechanism comprises two groups of binocular vision systems and two groups of acceleration sensors, wherein the two groups of binocular vision systems, the two groups of acceleration sensors and the two flexible hinged plates are corresponding in a one-to-one manner. Each binocular vision system is used for detecting a mark point region on the corresponding flexible hinged plate, and each acceleration sensor is disposed on the corresponding flexible hinged plate. The control assembly is connected with the rotating mechanism, the binocular vision systems and the acceleration sensors. The device effectively eliminates the impact on a vibration control effect from other uncontrollable factors, and provides conditions for the research of the control of the active vibration based on multiple sensors.

The invention relates to the technical field of fiber grating sensing, in particular to a multi-parameter large-capacity sensing system comprising a narrow-line-width pulse laser, an erbium-doped optical amplifier, a circulator, a matching interferometer, a reflected light detecting unit, and a computer that are connected successively by a fiber. The circulator is connected with an eccentric fiber; and an ultra-low reflectance grating array is engraved on the eccentric fiber. According to the system based on the reasonable structure, the ultra-low reflectance grating array of the eccentric fiber is used as a sensing unit to obtain a strong evanescent field, so that the system detection sensitivity and the signal-to-noise ratio are greatly improved; with the phi-OTDR technology, the Rayleigh scattering light is amplified effectively and the location of the signal point is determined by the delay between the detection input light and the received light, thereby realizing multi-point measurement; and on the basis of the coherent detection technique, the phase change of the interference signal between the adjacent eccentric ultra-low reflectivity gratings is detected under the effect of the external signal to demodulate the external signal, thereby realizing multi-parameter large-capacity detection on the temperature, vibration and strain.

The invention discloses a flow measurement system capable of adjusting a measuring position. The flow measuring system capable of adjusting the measuring position comprises a measurement device with a telescoping mechanism, a high static tube cavity, a low static tube cavity, a differential pressure transmitter and an analysis display device, wherein the measurement device with the telescoping mechanism includes main measurement elements, a fixing flange and a servo mechanism; the main measurement elements are connected with the servo mechanism; the servo mechanism is installed on the fixing flange. The main measurement elements are connected with the high static tube cavity and a low static tube cavity which are fixed on the fixing flange through a pressure tapping hose, the high static tube cavity is connected with a high static input end of the differential pressure transmitter, the low static tube cavity is connected with a low static input end of the differential pressure transmitter, the differential pressure transmitter is connected with a differential pressure signal which is output to an analysis display device, and the analysis display device gives the measuring value of air speed. The flow measurement system has the advantages that the measurement positions of the main measurement elements can be adjusted, more measurement elements can be arranged, so that the multi-point measurement can be realized.

The invention relates to the technical field of nuclear reactor equipment producing and machining, and discloses a reactor internal outlet pipe nozzle grinding and measuring device and a measuring and grinding method. An outlet pipe nozzle is and a pressure container cylinder are mounted in a matched manner, a cylindrical face is arranged on the end face of the outlet pipe nozzle, the measuring device comprises a frame, the frame is fixed to the outer side of a reactor internal cylinder, an adjusting pad is arranged on the periphery of the frame, the frame is locked on the outlet pipe nozzle through the adjusting pad, linear guide rails are arranged on the left side and the right side of the frame, and are located on the outer side of the outlet pipe nozzle, the linear guide rails are parallel to the axis of the reactor internal cylinder, a positioning ruler is arranged on the guide rails in a sliding manner, positioning holes are formed in the positioning ruler, and a depth gauge is used for measuring the depth of the outlet pipe nozzle through the positioning holes so as to determine the grinding amount. The measuring basis is determined through the depth gauge, point grinding amount measuring of the cylindrical face is achieved, the measuring process is simple, and the measuring and grinding efficiency is improved.

The invention, which belongs to the technical field of optical fiber optical measurement, specifically discloses a pile-based soil settlement monitoring system based on the optical fiber optical measurement technology. The system comprises a signal demodulation part, a network topology structure, a signal detection part and a measurement part. The signal demodulation part includes a broad spectrumlight source, a first connecting fiber, a second connecting fiber, a first fiber circulator, an adjustment arm, a data acquisition card and a computer. The network topology structure is formed by anoptical switch or a multi-channel divider and is formed by connection of a tree type structure. The signal detection part includes a plurality of detecting units; and each detection unit includes a second fiber circulator and a photoelectric detector. The measuring part includes a plurality of identical pile-based settlement sensors; and each pile-based settlement sensor includes a second opticalsplitter, a second self-focusing fiber collimator, a second reflector, a protective casing, a settling ring, and a pile. With the disclosed settlement monitoring system, problems that the measurementhas the error and real-time monitoring can not be realized in the prior art are solved.

The invention relates to a multi-point intelligent lifting and positioning cable stress detection instrument, which comprises a frame body sheathed on a stay cable of a cable-stayed bridge; and at least two sensor pushing mechanisms which comprise a brush DC motor, a No.1 telescopic push rod, a No. 2 telescopic push rod, a rotatable type connecting end, a vertical adjustment rod and a sensor fixing support. The brushed DC motor drives the screw rod to rotate and achieves the telescopic function through the engaged transmission between the internal thread of the No. 1 telescopic push rod and the screw rod; the No. 1 telescopic push rod drives the No.2 telescopic push rod to rotate so as to achieve the telescopic function; and the sensor fixing support is fixedly mounted at the end of the vertical adjustment rod, and the sensor fixing support is provided with a sensor chip. The driving mechanism comprises a driving motor and a driving wheel, wherein the driving motor drives the driving wheel to roll upwards and downwards along the cable-strayed bridge. According to the invention, the frame body is provided with at least two sensor pushing mechanisms, which cooperate with the sensor chip mounted on the frame body to realize simultaneous multi-point measurement and to make the cable stress detection data more accurate.

The embodiment of the invention discloses array substrate maintenance equipment and an array substrate maintenance method, relates to the technical field of the production of liquid crystal display panels, and can improve the energy detection efficiency of laser generated by equipment. The array substrate maintenance equipment provided by the embodiment of the invention comprises a laser generator, and an optical attenuator, a light beam expander, a light path slit and an objective lens arranged on a laser path in turn, wherein a rotary reflecting mirror is respectively arranged between the laser generator and the optical attenuator, between the optical attenuator and the light beam expander and between the light path slit and the objective lens; and the laser reaches a laser energy measuring probe arranged in the array substrate maintenance equipment after being reflected by the rotary reflecting mirrors. The array substrate maintenance equipment and the array substrate maintenance method provided by the invention are suitable for maintaining a thin film transistor-liquid crystal display (TFT-LCD) array substrate.

In the invention, 12 pieces of wheel axle recognition sensor (WARS) of optical fiber grating (OFG) are adopted as sensing part. LED is as light source. Using optical power meter carries out signal detection. The sensing part, the light source, and the optical power meter are connected through optical fiber to constitute an integrated wheel axle recognition system. According to certain combination mode, WARSs are cascaded to form 4 pieces of independent optical path. When wheel axle passes through WARS, change of Bragg reflection wavelength of OFG in corresponding WARS takes place; and the change changes reflected light intensity of entire optical path. Based on number of optical path, where light intensity changes, the system can determine number of tyre. Advantages are: simple structure, stable, accurate recognition, anti electromagnetic interference etc. The invention is applicable to weighting and charging system, over loading transportation management system etc. in toll station.

The invention provides a gas pressure monitoring system based on an optical fiber white-light interference measuring technology. The system comprises a white-light interference demodulator, an opticalfiber topology network and a gas pressure sensor set, the white-light interference demodulator comprises a white-light light source, a first optical fiber circulator, a second optical fiber circulator, a first optical fiber semi-reflecting mirror, a reflector, a first self-focusing lens, a stepping motor, a data acquisition card, a photoelectric detector and a computer, the optical fiber topologynetwork is formed by connection of optical switches or multiple channels of shunts in a tree-shaped structure, the gas pressure sensor set comprises a plurality of same gas pressure sensors, and eachgas pressure sensor comprises an elastic film, a reflective coating, a sensor housing, standard gas pressure inert gas, transparent glass, a second optical fiber semi-reflecting mirror and a second self-focusing lens. According to the gas pressure monitoring system based on the optical fiber white-light interference measuring technology, the gas pressure in a pressure container is monitored by employing the optical sensors so that the system is more applicable to pressure monitoring of gas pressure containers in severe conditions.

The present invention relates to a distribution box distribution transformation terminal of improving the reactive compensation efficiency. The distribution box distribution transformation terminal comprises a box body and an acquisition processor, the acquisition processor is connected with a reactive compensation controller and is equipped with an RS-485 communication interface, and the reactive compensation controller depends on a control signal issued by the acquisition processor to realize the reactive compensation. The RS-485 communication interface is connected with a residual current operated protector, and the box body is equipped with a branch loop monitoring device. The acquisition processor is connected with a digital signal processor, and a GPRS communication device which is connected with a master station normally is arranged outside the box body. The advantages of the present invention are that by using the acquisition processor to issue the control signal, a reactive power compensator compensates the voltages in a distribution box, a power factor of a power grid, the power supply efficiency and the power supply environment are improved, and the loss of a power supply transformer and the transmission lines are reduced; by using the acquisition processor to issue the control signal, the automation control of the reactive power compensator is realized, and the reactive power compensator can compensate the power in one step.

The invention discloses an apparatus and method for measuring deformation of a shock absorption block in a launching cylinder. The apparatus comprises a transmission member installed on the surface ofthe shock absorption block, wherein the transmission member is used for driving the shock absorption block to have relative displacement along with the deformation of the shock absorption block, anda moving direction of the transmission member is consistent with a radial direction of the launching cylinder; and the apparatus also comprises a cantilever beam installed in the launching cylinder, the installation direction of the cantilever beam is perpendicular to the moving direction of the transmission member, one end of the cantilever beam is connected with the transmission member, the other end of the cantilever beam is also adhered with a strain gauge, and the strain gauge is also used for being electrically connected to an external data acquisition system; and the strain gauge is used for detecting a strain value generated by the extrusion of the cantilever beam by the transmission member. According to the invention, the space occupied in the launching cylinder is very small, andthe installation is very convenient; measurers can be installed at multiple points in the launching cylinder according to the requirements, and a test wire can be led out at a sealed joint, thereby realizing the multipoint measurement; and the measurers can obtain the instantaneous deformation of the shock absorption block by virtue of experiments.