14results about How to "Realize simultaneous measurement" patented technology

The invention discloses a flexible pressure-temperature dual-mode sensor, which comprises a pressure sensitive layer, a temperature sensitive layer and a PET substrate, and is characterized in that the two surfaces of the PET substrate are printed with interdigital electrodes, and the two interdigital electrodes are connected through a copper foil; the pressure sensitive layer covers one of the interdigital electrodes to form a pressure sensing circuit, and the temperature sensitive layer covers the other interdigital electrode to form a temperature sensing circuit. According to the invention, the pressure sensitive layer and the temperature sensitive layer are combined together through mutual cooperation of the PET substrate and the interdigital electrode to form a temperature sensing circuit and a pressure sensing circuit, so that simultaneous measurement of temperature and pressure is realized.

The invention discloses an integrated optical fiber sensor for measuring temperature strain at extreme high temperature, and the sensor comprises a crystal optical fiber which comprises a first optical fiber segment, a second optical fiber segment and a third optical fiber segment which are connected in sequence; the first optical fiber grating is formed in the first optical fiber section of the crystal optical fiber; the second optical fiber grating is formed in the second optical fiber section of the crystal optical fiber; wherein the diameters of the first optical fiber section and the third optical fiber section are the same, and the diameters of the second optical fiber section are different from those of the first optical fiber section and the second optical fiber section. The integrated optical fiber sensor can measure the temperature and the strain at the same time in an extremely high temperature environment. The invention further discloses a preparation method of the integrated optical fiber sensor.

The invention discloses a multi-spiral resistor-capacitor element voltage transformer and a broadband transmission circuit, and relates to the field of voltage transformers, the multi-spiral resistor-capacitor element voltage transformer comprises a resistor-capacitor assembly and a resistor cylinder, the outer wall of the resistor cylinder is provided with a plurality of axially distributed spiral grooves, and a plurality of groups of resistor strings are embedded in the spiral grooves; elastic leads are arranged at two ends of the resistor string; the first flange and the second flange are fixedly connected with the two ends of the resistor cylinder. And a resistance-capacitance unit, the voltage transformation unit comprises a low-voltage arm and a resistor box; the screening unit comprises a far-end detection module and an acquisition module; and the acquisition module is connected in series with the far-end detection module, the high-pass filter B and the wave recording device. According to the utility model, the heat dissipation efficiency and the measurement efficiency of the resistor are improved by utilizing effective structure combination and material configuration, and the measurement frequency range of the mutual inductor is enhanced on the premise of ensuring the stability by utilizing a plurality of filtering devices with different levels, a preposed transformation circuit and a resistance-capacitance element.

The utility model discloses a double-parameter optical fiber sensor based on a conical few-mode fiber grating, which belongs to the technical field of optical fiber sensors and comprises a broadband light source (1), a sensing structure (2) and a spectrum analyzer (3). The sensing structure (2) comprises a first single-mode fiber (201), a coreless fiber (202), a conical few-mode fiber grating (203) and a second single-mode fiber (204); more cladding modes are generated through mode field mismatch of the single-mode optical fiber and the coreless optical fiber and bending of a conical area, the double-parameter sensitivity of the sensor is improved, and two transmission characteristic peaks appear on the fiber bragg grating inscribed on the few-mode optical fiber by using different mode numbers in the few-mode optical fiber. The reliability and repeatability of the sensor are greatly improved, the corresponding double-parameter sensitivity can be respectively calculated by observing the position change of an interference spectrum and a transmission characteristic peak, and a sensitivity matrix is further established, so that the simultaneous measurement of double parameters is realized. The sensor has the characteristics of high sensitivity, strong reliability, strong anti-interference capability, small size, simplicity in manufacturing and the like.

The utility model discloses a sonar temperature sensor and an electric kettle realizing water level measurement based on sonar technology, the sonar temperature sensor is integrated with a sonar sensor and a temperature sensor, the sonar temperature sensor comprises a T-shaped sensor housing, a sonar transduction sheet and a temperature measurement circuit board, and the sonar transduction sheet and the temperature measurement circuit board are both arranged in the sensor housing; wherein the sonar transduction sheet is glued at the upper part in the sensor shell by using epoxy resin glue, and the temperature measurement circuit board is arranged on the inner wall of the sensor shell, so that the temperature measurement circuit board is respectively connected with the sensor shell and then is encapsulated by epoxy resin; the sensor shell is made of 304 stainless steel, and the sensor shell is directly used for signal receiving and transmitting of the sonar sensor and the temperature sensor so that the water level height and the water temperature can be conveniently detected. According to the utility model, the sonar temperature sensor is integrated, the installation is convenient, and the water level measurement accuracy can be improved through the sonar sensor.

The invention relates to the technical field of mass spectrum analyzers, in particular to a mass spectrum ionization device and method for cooperatively monitoring dirt and carbon. The device comprises a high-pressure photochemical ionization cavity and a low-pressure photoelectron ionization cavity, an ion transmission module and an ion convergence reaction electrode group are arranged in the high-pressure photochemical ionization cavity; organic product ions are generated in the high-pressure photochemical ionization cavity and penetrate through a differential electrode to be transmitted into the low-pressure photoelectron ionization cavity; an electron transmission module, an ion convergence multi-pole rod group and an ion extraction electrode are arranged in the low-pressure photoelectron ionization cavity, the low-pressure photoelectron ionization cavity generates inorganic product ions, and the inorganic product ions and organic product ions penetrate through the ion extraction electrode and are transmitted to the mass analyzer for detection. Cascade connection of the two ion sources under different working air pressures is realized through vacuum difference, so that ionization detection of the two ionization sources can be obtained through single sample introduction, the analysis coverage of a mass spectrometer is greatly improved, and the application field is widened.

The invention provides a multiphase fluid metering device and method. The metering device comprises a drainage pipe, a rotational flow generating device, a drainage adjusting device and a drainage collecting device. The rotational flow generating device is configured to enable gas-liquid two-phase fluid in the drainage pipe to perform rotational flow by taking the axis of the drainage pipe as an axis; a fluid outlet of the drainage pipe is located in the side wall of the drainage pipe. The drainage adjusting device is configured to adjust the size of a fluid outlet of the drainage pipe; the leakage flow collecting device surrounds the leakage flow pipe; a first pressure sensor is arranged between the rotational flow generating device and the fluid outlet of the drainage pipe; and a second pressure sensor is arranged on the inner wall of the discharged flow collecting device. The metering device is small in size, compact in structure, wide in application range and capable of achieving simultaneous measurement of multi-phase fluid split-phase flow and gas and liquid phase mass holdup.

The application relates to a nuclear power plant neutron energy spectrum and direction measuring device, system and method, which comprises a packaging shell, the packaging shell comprises an upper shell and a lower shell, a detection module is arranged between the upper shell and the lower shell, the detection module comprises a support and a plurality of plastic scintillators, the support is used for fixing and spacing the plurality of plastic scintillators to shield neutrons, a first signal acquisition module is arranged between the upper shell and the detection module and is used for acquiring a first group of scintillation light signals generated by the plurality of plastic scintillators close to one end of the upper shell, and a second signal acquisition module is arranged between the detection module and the lower shell and is used for acquiring a second group of scintillation light signals generated by the plurality of plastic scintillators close to one end of the lower shell. The application can realize simultaneous measurement of neutron energy spectrum and direction, has the advantages of lightness, radiation resistance and real-time monitoring, and is suitable for nuclear power neutron energy spectrum and direction measurement.

The present invention belongs to the field of flow field testing technology, and specifically relates to a probe for measuring all parameters of a subsonic three-dimensional steady-state flow field, including a probe head, a temperature sensor, a convection heat exchange groove, an insulating seal, five pressure measuring holes, a pressure pipe channel, a probe support rod, a pressure pipe and a temperature sensor cable. The probe head is cylindrical, and the top of the cylinder has a concave ball socket structure perpendicular to the center line of the cylinder. The inner wall of the ball socket is provided with a pressure measuring middle hole, a pressure measuring upper hole, a pressure measuring lower hole, a pressure measuring left hole and a pressure measuring right hole that are not connected to each other, and a cross-shaped convection heat exchange groove is provided on the back of the ball socket. The temperature sensor is placed in the convection heat exchange groove and faces the center line of the pressure measuring middle hole. The probe of the present invention can simultaneously measure the total temperature, total pressure, static temperature, static pressure, Mach number, deflection angle, pitch angle, speed, density and other parameters of a subsonic three-dimensional steady-state flow field, and has the characteristics of small size, long life, wide airflow insensitive angle, high reliability, high spatial resolution and high measurement accuracy.

The invention relates to a double-beta plastic scintillator detector based on SiPM readout. The double-beta plastic scintillator detector comprises two hollow plastic scintillators, a SiPM array, a corresponding signal readout circuit, an inflation pipeline, a valve, a reflecting film and a light shielding layer. The two hollow plastic scintillators are stacked away from light; the SiPM array is coupled to the side surface of the hollow plastic scintillator, and the signal-to-noise ratio of the detector is improved by using the SiPM array partition according with the noise reduction technology; the two hollow plastic scintillators pasted with the reflecting films and the light shielding layers are packaged in a stainless steel shell to form a dual-channel beta plastic scintillator detector so as to realize synchronous high-sensitivity measurement of different radioactive gases. According to the invention, the two hollow plastic scintillators are packaged into the double-beta detector, so that synchronous high-sensitivity measurement of different radioactive gases can be realized. The SiPM is assembled on the side wall of the scintillator, and two oppositely arranged gamma detectors can be adopted for measurement, so that the gamma ray detection efficiency is improved, and the detection sensitivity is further improved.

The invention discloses a vegetation composite parameter synchronous monitoring remote sensing imaging system. Incident parallel light is imaged through an off-axis three-mirror telescopic system, and is divided into a front view field and a rear view field after passing through a view field scanning assembly and a view field division element; wherein one view field is imaged on a detector focal plane of the first detector focal plane circuit assembly after passing through the relay optical system and the low-distortion high-dispersion light splitting system; the other view field is imaged on the detector focal plane of the second detector focal plane circuit assembly after passing through the low-distortion high-resolution light splitting system; the integrated electronics assembly drives the first detector focal plane circuit assembly and the second detector focal plane circuit assembly to carry out photoelectric signal conversion, hyperspectral and hyper-spectral imaging detection is completed, and vegetation composite parameter synchronous monitoring remote sensing imaging is achieved. According to the system, the problem that the monitoring precision of the vegetation health state and the carbon sink capacity is limited by multiple parameters and cannot be synchronously detected due to the fact that key elements of existing land surface vegetation parameter detection load measurement are not synchronous is solved.

The application discloses a dielectric constant microwave sensor with a microstrip coupling line structure and particularly relates to the technical field of microwave sensing, and comprises a metal transmission line on an upper layer, a dielectric substrate on a middle layer and a grounded metal plate on a bottom layer; a signal path of the upper layer structure of the microwave sensor is arranged between the first port and the second port, and the signal path is composed of at least one transmission line, four coupling lines and two metalized through holes. The microstrip coupling line structure adopted in the application is sensitive to changes in the dielectric constant of external materials, has the advantages of small size, easy processing, low cost, high precision and the like, different sizes of the microstrip coupling line provide two measurement working frequency bands, and the microwave sensor can be effectively applied to solid dielectric constant measurement work.

The application discloses a pre-assembly-free large steel truss section assembly multi-point real-time digital monitoring method and system, belongs to the technical field of bridge construction monitoring, solves the problem that the existing method cannot realize multi-point simultaneous measurement and cannot realize real-time feedback when the optical prism method is used for steel pipe section assembly positioning, and the method comprises the following steps: segment main pipe blanking scanning, segment main pipe line laying monitoring, segment main pipe assembly deviation rectification, and flange plate line laying fixing; the application provides a pre-assembly-free large steel truss section assembly multi-point real-time digital monitoring method, multiple visual measurements are adopted to avoid the visual line blockage of one-way measurement, and time waste caused by repeated conversion of measurement stations is avoided; the end centroid of the steel pipe can be accurately controlled, and uncertain errors caused by the measurement of a single waist line of the circular pipe are avoided; and a prior measurement recording method is adopted, only three mark points of the main pipe body are measured in the formal assembly stage, and the efficiency of line laying measurement is greatly improved.

The invention provides a subminiature temperature and pressure integrated sensor and a preparation method thereof. The subminiature temperature and pressure integrated sensor comprises a substrate structure, a pressure signal detection area, a temperature signal detection area, an electrode leading-out area and a metal shading layer. The pressure signal detection area comprises a closed cavity, a thin film structure, a piezoresistor and a pressure concentrated boron lead layer; the temperature signal detection area comprises a temperature sensitive resistor and a temperature concentrated boron lead layer; the electrode leading-out area comprises four electrode signal interfaces. The pressure signal detection area adopts a half-bridge circuit for pressure signal detection, the temperature signal detection area adopts a single temperature-sensitive resistor for temperature signal detection, the tests of the two signals are mutually independent and do not influence each other, and metal shading layers are arranged on the surfaces of the pressure signal detection area and the temperature signal detection area. The sensor is simple in structure, small in size, high in precision, good in shading effect, convenient to install due to the fact that the sensor is packaged into a four-wire mode, safe and reliable in manufacturing material, and capable of being installed in a medical catheter to be placed in a human body to achieve real-time measurement of pressure and temperature.