32results about How to "Realize multi-parameter measurement" patented technology

The invention discloses a stroma moisture and conductivity in situ detector and a method for determining salinity. The detector comprises an integrated electrode sensor probe (1), a sensor signal conditioning circuit (2) and a signal processing control unit (3), wherein the integrated electrode sensor probe (1) is formed by a probe (11), a probe (12), a probe (13) and a probe (14) with space of 20mm; the integrated electrode sensor probe (1) and the sensor signal conditioning circuit (2) are encapsulated in a shell (4) in an insulating manner; the signal processing control unit (3) is encapsulated in a shell (5); and the shell (4) and the shell (5) are connected by a group of cables (6). The detector and the method have the following beneficial effects: the structure is simple; manufacturing is convenient; multiple parameters can be simultaneously measured; and the measuring results are more accurate and the adaptability is stronger.

The invention discloses a temperature sensor based on a grapheme-film-modified biconical micro-nano optical fiber coupler. The device comprises a super-continuous broadband light source, a graphene-modified micro-nano optical fiber coupler sensing unit and a spectrum analyzer. The graphene-modified micro-nano optical fiber coupler sensing unit is respectively connected with the super-continuous broadband light source and the spectrum analyzer through connecting optical fibers. On the basis of the electric heating high-temperature fused biconical taper method, a biconical 2*2 micro-nano opticalfiber coupler is prepared; the central lumbar vertebra uniform area of the coupler is plated with a graphene film by using a film wet transfer method; and the sensitivity of the effective refractiveindex of the coupler intermode interference to the external environment temperature is improved by utilizing the high thermo-optic coefficient and the high thermal conductivity of the graphene film, so that the high temperature measurement sensitivity is realized. Meanwhile, the involved sensor shows the excellent linearity, repeatability and stability in experiments. The temperature sensor has advantages of being compact in structure, easy to manufacture, low in cost and easy to integrate with other optical fiber systems.

The invention relates to a water quality monitoring probe based on an ultraviolet visible absorption spectrum and a fluorescence spectrum. The water quality monitoring probe comprises a flash lamp, a first convex lens, a first water quality monitoring window, a second water quality monitoring window, a multi-wavelength laser source for exciting fluorescent light, a third water quality monitoring window, a chopper, a convex lens, an ultraviolet visible fiber spectrum measurer, a controller signal processor, a flash lamp controller, a multi-wavelength laser source controller for exciting fluorescent light and a stepping motor. A water sample can be scanned by a continuous ultraviolet visible spectral region, continuous absorbancy information in water quality is acquired, various parameters in the water quality are acquired by a diversified analyzing means, water characteristic information in the various data is calculated, a correcting model between spectrum data and the water quality parameters is established according to the data, and the model is used as a tool to realize water quality parameter analysis.

The invention provides a multi-signal synchronous feedback device for oil detection. The device comprises a detection device and an exciting-detection unit; the detection device comprises a micro-fluidic chip and used for differentiating and detecting ferromagnetic metal particles, non-ferromagnetic metal particles, water drops and bubbles in the oil; a sedimentation tank is firstly arranged in the chip, the metal particles and the non-metallic particles can be effectively separated, thereby realizing synchronous detection of four particle pollutants; a measurement mode switching unit is saved, the chip can be directly connected with the exciting-detection unit, the response time of the signal collection is shortened, and the detection effect is more precise and efficient. The chip integrates two sensing units into a chip, the multi-parameter measurement on the induction, the resistance and capacitance in the oil is realized, thereby accomplishing the differentiating and detection of multiple particle pollutants in the lubricating oil and the hydraulic oil; an effective method is provided for performing oil online monitoring on the machine equipment, and the fault diagnosis can beperformed on the machine equipment.

The invention discloses a testing method for a semiconductor gas sensitive element, and belongs to the field of element testing. The method is used for solving the problem that an existing semiconductor gas sensitive element testing method is not perfect. The testing method is technically characterized by comprising the step of assembling and testing a semiconductor gas sensor testing system and the step of analyzing the semiconductor gas sensor testing system and the performance of the semiconductor gas sensitive element. The testing method has the advantage that powerful guarantees are provided for the testing environment and the testing precision of the semiconductor gas sensitive element.

The invention relates to an electromagnetic ultrasonic detection method for plane residual stress, belongs to the technical field of ultrasonic detection, and relates to an electromagnetic ultrasonicdetection system and detection method for plane residual stress. The method comprises the steps of: firstly, assembling the electromagnetic ultrasonic detection system, and measuring stress detectionultrasonic signal waveforms in three directions by using ultrasonic coils in an electromagnetic ultrasonic surface wave probe so as to calibrate an acoustic elastic coefficient of a material. The surface wave signals in three directions of a point to be measured are collected, and the magnitude and direction of plane stress are calculated by using an ultrasonic detection theoretical formula. In the method, one-time positioning of the two principal stresses in the plane stress state and the included angle between the two principal stresses, and simultaneous measurement of multiple parameters are realized by using the surface wave probe with the function of three-transmitting and three-receiving. The distance between receiving and transmitting probes is reduced and the spatial resolution ofthe probe are improved by reducing the turns per coil, the line width and the line distance of ultrasonic transmitting and receiving coils. A circuit board and an impedance matching network are connected by using a radio frequency connector, thereby facilitating the installation and repeated use for multiple times, the detection method is simple, and the efficiency is high.

The invention discloses a detection device for a mechanical cam controller; a driving mechanism is used for driving the mechanical cam controller and an encoder to rotate by a coupler; the encoder is used for sending the acquired crankshaft angular velocity information into a control system; a movement monitoring signal generator is used for acquiring crankshaft status signals and sending the signals into the control system; a photoelectric position sensor is used for acquiring the switch position of a cam group and sending the switch position into the control system by a photoelectric signal receiver; and a switch contact is used for sending a switch power-on opening and closing signal into the control system. The control system can be used for processing the signals by an internal computing system, so that the test aim can be achieved. The detection device is suitable for testing the performances and the service life of the mechanical cam controller, can realize multi-parameter measurement, especially the measurement for repeatability precision, and has the characteristics of being accurate in test results, visual, quantitative, small in size and high in efficiency.

The invention provides a force / torque measuring sensor which comprises an elastic base, a substrate and a full-bridge sensitive element, wherein the substrate is arranged on an elastomer to be utilized as a middle base, and the full-bridge sensitive element is arranged on the substrate to be used for detecting a twisting force value and a torque value of the elastic base in deformation and outputting detection results in a multi-channel mode. According to the force / torque measuring sensor disclosed by the invention, the ceramic substrate is arranged on the elastic base of the force / torque measuring sensor, the thick-film full-bridge sensitive element is arranged on the ceramic substrate to measure the twisting force and the torque; on one hand, the problems that the ceramic substrate has low elastic strength and large fragility are effectively overcome, and the sensor can be used under varieties of dynamic impact conditions; on the other hand, high-output-flexibility multi-parameter measurement and multi-channel transmission of the twisting force and the torque are achieved.

The invention discloses a humidity-controllable semiconductor gas-sensitive element testing method including a SnO2 gas-sensitive material preparation step, belongs to the field of element testing andaims at solving the problem that an existing formaldehyde gas-sensitive element testing method is incomplete and the problem of low humidity control precision. The humidity-controllable semiconductorgas-sensitive element testing method is technically characterized by including the SnO2 gas-sensitive material preparation step, a semiconductor gas sensor testing system establishment and testing step and a semiconductor gas sensor testing system and semiconductor gas-sensitive element performance analysis step. By adopting the method, formaldehyde gas-sensitive element testing is more perfect and the humidity controllability and control precision are improved.

The invention relates to a multi-parameter logging method while drilling based on a controllable neutron source, which includes the steps of utilizing a multi-detector measuring system consisting of the D-T controllable neutron source, two thermal neutrons and two gamma detectors, sufficiently utilizing fast neutrons transmitted by the controllable neutron source to militate with atomic nucleuses of formation elements by means of special pulse and measuring timing sequence design, recording gamma energy spectrums, gamma time spectrums and thermal neutron time spectrums at different positions, and performing simultaneous measurement of multiple parameters such as formation density, formation porosity, formation fluid saturation, formation element content and the like with a nuclear logging instrument in a drilling process by means of different spectral resolution and data processing, so that valuation on formation lithology, formation porosity and formation fluid saturation while drilling are realized, the same parameter of the formation porosity and the formation fluid saturation can be measured by various methods, logging interpretation ambiguity is decreased, and accuracy and reliability of logging data interpretation are enhanced.

The invention relates to a cold atom multi-parameter measuring device based on a multi-dimensional balance detection technology. A two-dimensional magneto-optical trap is formed by a two-dimensional cooling laser, a two-dimensional gradient coil and a two-dimensional vacuum cavity, and is used for achieving output of a cold atom beam current; a three-dimensional cooling laser, a three-dimensionalgradient coil and a three-dimensional vacuum cavity form a three-dimensional magneto-optical trap which is used for capturing the cold atom beam current to form a cold atom group; the two-dimensionalmagneto-optical trap and the three-dimensional magneto-optical trap are connected through a vacuum differential tube; three pairs of photoelectric detectors are arranged on three pairs of orthogonal metal surfaces of the three-dimensional vacuum cavity; photosensitive surfaces of the three pairs of photoelectric detectors directly face a geometric center of the three-dimensional magneto-optical trap; and output ends of the three pairs of photoelectric detectors are connected with input ends of corresponding SMA coaxial cables, the output ends of the SMA coaxial cables are connected to the input end of a USB multi-channel data acquisition card, and the output end of the USB multi-channel data acquisition card is input into a data processing module through a USB connecting line. In the invention, cold atom multi-parameter measurement is realized.

The invention discloses a generator stator fault monitoring method and device based on strain and sound wave sensing. The method comprises: installing a sensing optical cable used for measuring the strain and sound wave signals of a large generator stator; calibrating the length of the sensing optical cable and the three-dimensional coordinate of the generator stator; acquiring strain-sound wave signals generated by various faults of a large generator stator, and constructing a convolutional neural network training model for generator stator fault monitoring; performing generator stator fault monitoring, and updating a fault sample library in combination with a field manual maintenance result; and using the updated fault sample library to retrain the generator stator fault monitoring model, and using the updated generator stator fault monitoring model to perform fault type identification and prediction on the large generator in operation based on the abnormal strain-sound wave signal. According to the invention, the fault monitoring range and precision of the generator stator are expanded, and the fault of the large-scale generator stator can be predicted.

The invention relates to a Y waveguide parameter measuring instrument, a Y waveguide parameter measuring system and a Y waveguide parameter measuring method. The Y waveguide parameter measuring instrument comprises a light source, a variable optical attenuator, a circulator, an optical detector, an optical path conversion device and an upper computer. The output end of the light source is connected with the input end of the variable optical attenuator, and the output end of the variable optical attenuator is connected with the first port of the circulator; a second port of the circulator is connected with one end of the trunk of the Y waveguide to be measured; the other end of the trunk is connected with one end of the first fork of the Y waveguide to be measured and one end of the secondfork of the Y waveguide to be measured; the other end of the first fork is connected with a first port of the light path conversion device; the other end of the second fork is connected with a secondport of the light path conversion device; a third port of the circulator is connected with the input end of the optical detector; the output end of the optical detector is connected with the upper computer. According to the invention, multi-parameter measurement is realized based on a measurement method of a traditional Sagnac interferometer, the measurement steps are simple, the cost is greatly reduced, and one-key full-automatic measurement is realized.

The invention belongs to the technical field of aero-engine inlet flow field measuring devices, and particularly relates to an anti-large overload combined distortion measuring rake on an intake passage. The anti-large overload combined distortion measuring rake on an intake passage is composed of a steel framework and a rubber material (1). The steel framework is a hollow structure, and composedof a rake arm (2), a mounting base (3) and measuring point outer sleeves (4). The cross section of the rake arm (2) is a U-shaped structure. The measuring point outer sleeves (4) for internally mounting sensors are distributed along the radial direction of the rake arm (2). The base (3) is an arc shape, and is provided with bolt holes connected with the mounting wall surface. A hole communicated with the hollow part of the rake arm is formed on the middle of the base. According to the anti-large overload combined distortion measuring rake on an intake passage, the steel framework of the measuring rake is formed integrally by using numerical control; a temperature and pressure sensor can be mounted in the outer sleeve to realize the multi-parameter measurement; and a threaded mount mode isadopted for the sensor to conveniently disassemble and assemble the temperature and pressure sensor, so that the utilization efficiency of the sensor is improved.

The invention discloses a multi-parameter landslide monitoring device and method based on a weak grating, and the device comprises a multi-parameter fiber optic sensor, a weak grating demodulator anda power supply device, wherein the multi-parameter fiber optic sensor is a whole sensing optical cable, which includes a weak grating water level sensor, a weak grating inclination sensor, a weak grating rope sensor and a weak grating water pressure sensor, that are located at the tail end and connected in series, and a stress strain sensing cable located at the front end; the weak grating demodulator is used to demodulate wavelength change information in the multi-parameter fiber optic sensor and transmit information externally by wired or wireless means; and the power supply device is used to supply power to the weak grating demodulator. The multi-parameter landslide monitoring device based on the weak grating provided by the invention packages the weak optical fiber gratings into various sensors through different packaging technologies according to requirements by customizing and engraving a plurality of weak grating arrays on a single optical fiber to realize the simultaneous monitoring of multiple parameters on one sensing optical cable, which is of great significance in landslide monitoring.

The invention provides a measuring device for multi-parameters of a solid-liquid two-phase flow, and relates to the technical field of measurement of basic parameters of the two-phase flow. The measuring device comprises a box body and a box cover. A circular opening is formed in the top of the box body, and is matched with the box cover. A measuring mechanism for the heat conduction coefficient and a density measuring mechanism are arranged on the box cover respectively. The density measuring mechanism comprises an ultrasonic transducer fixing seat arranged at the bottom of the box cover andan ultrasonic transducer arranged inside the ultrasonic transducer fixing seat for measuring, wherein an organic glass plate is arranged right under the ultrasonic transducer. The measuring mechanismfor the heat conduction coefficient comprises a glass tube arranged at the bottom of the box cover. A metal platinum wire is mounted on the core of the glass tube, and a wire is arranged on the surface of the glass tube. The wire and the metal platinum wire form a loop for measuring the thermal conductivity coefficient. According to the measuring device for multi-parameters of the solid-liquid two-phase flow, the measuring device has the beneficial effects that multi-parameter measurement, such as density, thermal conductivity, and the like, can be realized; that the structure is simple; and that the measurement result is more accurate.

The invention provides a humidity-controllable semiconductor gas sensitive element testing system, belongs to the field of element testing and aims at solving the problems of incomplete testing of existing formaldehyde gas sensitive elements and low humidity control precision. The humidity-controllable semiconductor gas sensitive element testing system is technically characterized by being provided with a humidity control system and a semiconductor gas sensor testing system. The humidity control system is used for controlling the humidity of an air chamber and comprises a main controller, a humidity detecting sensor, a dehumidifier, an ultrasonic humidifier and a buzzer, wherein the humidity detecting sensor, the dehumidifier and the ultrasonic humidifier are installed in the air chamber,and the main controller is connected with the humidity detecting sensor, the dehumidifier, the ultrasonic humidifier and the buzzer. The humidity-controllable semiconductor gas sensitive element testing system makes formaldehyde gas sensitive element testing more complete and improves the humidity controllability and control precision.

The invention relates to a wireless sensor network device of a waterborne traffic safety control system and a remote monitoring system; the device consists of a remote monitoring center, a wireless public network, a data concentrator, a sensor terminal and a ZigBee area wireless network; the data concentrator and the sensor terminal carry out the data communication by the ZigBee area wireless network; the data concentrator sends the parameters which are measured by the sensor terminal and gained by the ZigBee area wireless network to the remote monitoring center and receives the data which is transmitted by the remote monitoring center by the wireless public network; the data concentrator consists of an embedded micro-processor, a wireless public network module, a ZigBee module, a power module and an EEPROM; the sensor terminal consists of a PIC singlechip, a ZigBee module, an EEPROM module, a dial switch and a power module; the device and the system have the advantages of multi-parameter measurement and simple installation process, need no complex wiring in-situ and can meet the multi-parameter measurement requirement under complicated waterborne environment.

The invention provides a pH adjusting device comprising a medicament storage box, a control chip, a pH sensor, a solenoid valve, a liquid metering unit, and an input unit; the control chip obtains pHfrom the pH sensor, obtains a medicament volume change value from the liquid metering unit, and adjusts the solenoid valve open and close levels according to the pH and the volume change value, thus allowing the adjusted liquid pH to reach the target pH. The pH adjusting device is simple in structure, easy to use, can effectively adjust pH values of different adjusted liquids, thus enabling the liquid to reach the pH value needed by experiment personnel. In addition, the device has excellent expandability, and can measure multiple parameters of the adjusted liquid.

The invention discloses a gas sensor making step-containing method for testing a humidity-controllable semiconductor gas sensor, and belongs to the field of element test. The method is used for solving the problems of incomplete test methods and low humidity control precision of existing formaldehyde gas sensors. The method comprises the following steps: making the gas sensor, building and testinga semiconductor gas sensor test system, and carrying out performance analysis on the semiconductor gas sensor test system and the semiconductor gas sensor. The method achieves the complete test of the formaldehyde gas sensors, and improves the controllability and the control precision of the humidity.

The invention relates to a portable CO2 monitoring device and method for seismic precursor flow observation. The monitoring device comprises an air inlet, a first electromagnetic valve, a dehumidifying device, a flow controller, a CO2 sensing detecting unit, a second electromagnetic valve, a purifying device, an air outlet and a main control circuit. The air inlet, the first electromagnetic valve,the dehumidifying device, the flow controller, the CO2 sensing detecting unit, the second electromagnetic valve and the air outlet are orderly connected. The purifying device is connected between thefirst electromagnetic valve and the second electromagnetic valve. The first and second electromagnetic valves and the CO2 sensing detecting unit are respectively connected to the main control circuit. The device comprises a measuring gas path and a self-calibrating circulating gas path. The CO2 sensing detecting unit has an integrated design based on an infrared absorption principle, has a high detection limit and a fast response speed, can correct the CO2 concentration based on an environmental factor through multi-parameter measurement and can improve the accuracy of CO2 concentration detection. The device is small in size, is easy to carry and can be used in the harsh environment at the earthquake precursor observation point.

The invention mainly relates to a semiconductor gas sensor test system, belongs to the field of element testing and is used for solving the problem that an existing semiconductor gas sensitive element testing method is incomplete. The semiconductor gas sensor testing system is characterized by being used for dynamically distributing gas for different gases under given concentration and enabling a multi-branch sensor array to monitor change of conductivity on the surfaces of gas sensitive elements in real time when gases are introduced.

The invention relates to an electromagnetic ultrasonic detection method for plane residual stress, belongs to the technical field of ultrasonic detection, and relates to an electromagnetic ultrasonicdetection system and detection method for plane residual stress. The method comprises the steps of: firstly, assembling the electromagnetic ultrasonic detection system, and measuring stress detectionultrasonic signal waveforms in three directions by using ultrasonic coils in an electromagnetic ultrasonic surface wave probe so as to calibrate an acoustic elastic coefficient of a material. The surface wave signals in three directions of a point to be measured are collected, and the magnitude and direction of plane stress are calculated by using an ultrasonic detection theoretical formula. In the method, one-time positioning of the two principal stresses in the plane stress state and the included angle between the two principal stresses, and simultaneous measurement of multiple parameters are realized by using the surface wave probe with the function of three-transmitting and three-receiving. The distance between receiving and transmitting probes is reduced and the spatial resolution ofthe probe are improved by reducing the turns per coil, the line width and the line distance of ultrasonic transmitting and receiving coils. A circuit board and an impedance matching network are connected by using a radio frequency connector, thereby facilitating the installation and repeated use for multiple times, the detection method is simple, and the efficiency is high.

The non-destructive testing method for ZnO single crystal physical parameters disclosed in the present invention is mainly based on the dielectric relaxation effect of point defect weakly bound electron hopping conductance: the transport of weakly bound electrons at high frequencies is limited to the unit cell, mainly as Dielectric relaxation; the transport of weakly bound electrons at low frequencies can cross the depletion layer or even the entire grain, mainly manifested as a conductance process, and the dielectric relaxation effect will reach saturation at this time; according to the inflection point where the dielectric constant changes The corresponding frequency can calculate the geometric size of the depletion layer and the grain; the test process mainly uses the dielectric spectrum to characterize the thickness of the depletion layer and the grain size, and at the same time uses the modulus spectrum to analyze the low-frequency conductance and high-frequency relaxation information. Diagnose the diagnosis, and obtain the impedance parameters of each part of the inhomogeneity through impedance spectroscopy. The non-destructive detection method for ZnO single crystal physical parameters of the invention has the advantages of simple operation, non-destructive and small error.

The invention provides a multi-signal synchronous feedback device for oil detection, which includes a detection device and an excitation-detection unit, and the detection device includes a microfluidic chip for distinguishing and detecting ferromagnetic metal particles and non-ferromagnetic metal particles in the oil , water drops and air bubbles. For the first time, a sedimentation tank is set in the chip, which can effectively separate metal particles and non-metal particles, and realize simultaneous detection of four kinds of particle pollutants. The measurement mode switching unit is omitted, and the chip can be directly connected to the excitation-detection unit, which shortens the response time of signal acquisition and makes the detection effect more accurate and efficient. The chip integrates two sensing units into one chip, and realizes the multi-parameter measurement of inductance, resistance and capacitance in the oil, so as to complete the differential detection of various particle pollutants in lubricating oil and hydraulic oil. On-line oil monitoring of machinery and equipment provides an effective method, and can carry out fault diagnosis on machinery and equipment.

The invention discloses a humidity control method in the test of a humidity-controllable semiconductor gas sensor, and belongs to the field of element test. The method is used for solving the problemsof incomplete test methods and low humidity control precision of existing formaldehyde gas sensors. The humidity control system comprises a host computer, the host computer has a man-machine interaction interface and is used for man-machine interaction operation and displaying the preset value and the measured value of the humidity, a main controller is a PLC, and the PID adjusting module of thePLC is used to carry out closed loop control on the humidity in a gas chamber. The method achieves complete test of the formaldehyde gas sensor and improves the controllability and the control precision of the humidity.

The invention discloses a temperature sensor based on a grapheme-film-modified biconical micro-nano optical fiber coupler. The device comprises a super-continuous broadband light source, a graphene-modified micro-nano optical fiber coupler sensing unit and a spectrum analyzer. The graphene-modified micro-nano optical fiber coupler sensing unit is respectively connected with the super-continuous broadband light source and the spectrum analyzer through connecting optical fibers. On the basis of the electric heating high-temperature fused biconical taper method, a biconical 2*2 micro-nano opticalfiber coupler is prepared; the central lumbar vertebra uniform area of the coupler is plated with a graphene film by using a film wet transfer method; and the sensitivity of the effective refractiveindex of the coupler intermode interference to the external environment temperature is improved by utilizing the high thermo-optic coefficient and the high thermal conductivity of the graphene film, so that the high temperature measurement sensitivity is realized. Meanwhile, the involved sensor shows the excellent linearity, repeatability and stability in experiments. The temperature sensor has advantages of being compact in structure, easy to manufacture, low in cost and easy to integrate with other optical fiber systems.

The invention discloses a method and device for monitoring a generator stator fault based on strain and acoustic wave sensing, which includes: installing a sensing optical cable for measuring the strain and acoustic wave signal of a large generator stator; connecting the length of the sensing optical cable to the power generation The three-dimensional coordinates of the generator stator are calibrated; by collecting the strain-acoustic signals generated by various faults of the large-scale generator stator, a convolutional neural network training model for generator stator fault monitoring is constructed; the generator stator fault monitoring is carried out, combined with the field Manual maintenance results update the fault sample library; use the updated fault sample library to retrain the generator stator fault monitoring model, and use the updated generator stator fault monitoring model to analyze the fault types of large generators in operation based on abnormal strain-acoustic signals Identify and predict. The invention expands the range and precision of generator stator fault monitoring, and can predict the fault of large generator stator.

The invention discloses a detection device for a mechanical cam controller; a driving mechanism is used for driving the mechanical cam controller and an encoder to rotate by a coupler; the encoder is used for sending the acquired crankshaft angular velocity information into a control system; a movement monitoring signal generator is used for acquiring crankshaft status signals and sending the signals into the control system; a photoelectric position sensor is used for acquiring the switch position of a cam group and sending the switch position into the control system by a photoelectric signal receiver; and a switch contact is used for sending a switch power-on opening and closing signal into the control system. The control system can be used for processing the signals by an internal computing system, so that the test aim can be achieved. The detection device is suitable for testing the performances and the service life of the mechanical cam controller, can realize multi-parameter measurement, especially the measurement for repeatability precision, and has the characteristics of being accurate in test results, visual, quantitative, small in size and high in efficiency.