57results about How to "Simple detection system" patented technology

The invention discloses a method for heterodyne temporal series speckle interferometry of object deformation, belonging to the laser speckle interferometry field. The method combines the temporal series speckle interferometry with the heterodyne interferometry, directly presents the phase function of a time-varying field and introduces frequency difference in order to guarantee the deformation measuring precision. The invention simplifies the object deformation detection system and is better adaptable to the memory speed of high speed CCD through a lithium niobate polarization controller.

The invention discloses a mass flow rate measuring device and method based on electrostatic and capacitive sensor arrays for powder particles in a pipeline. The powder mass flow rate measuring device comprises an electrostatic sensor array, a capacitive sensor array, a data collecting module and a data processing module; the data collecting module is used for collecting electrostatic signals between each pair of electrostatic electrode slices in the electrostatic sensor array and output signals between two adjacent capacitive electrode slices in the capacitive sensor array; the data processing module comprises a powder speed calculation unit, a powder concentration calculation unit and a powder mass calculation unit. According to the powder mass flow rate measuring device and method, concentration distribution and speed distribution of powder on the pipeline section are fully taken into account, and therefore accurate measurement on the powder mass flow rate is achieved.

The invention discloses a method for detecting material magnetic properties and stress based on a Barkhausen noise principle, wherein the method includes the steps: (1) through an envelope line of a Barkhausen noise signal, reckoning a ferromagnetic material magnetic hysteresis loop: (2) extracting stress detection characteristic values on the ferromagnetic material magnetic hysteresis loop: envelope area, center height difference, center width and integral curve area; (3) carrying out magnetic property and stress analysis of a ferromagnetic material by using the stress detection characteristic values, to obtain detection values of the material magnetic properties and stress; and (4) evaluating the stress detection characteristic values, and verifying the accuracy of the material magnetic property and stress detection values obtained by the magnetic property and stress analysis. The Barkhausen noise signal and the magnetic hysteresis loop are correlated in detection, the magnetic properties of the material are directly reflected and determined by the new characteristic values and the stress is detected by the new characteristic values, and the accuracy of stress detection is further improved.

This invention belongs to piezoelectric sensor technique field and in detail is a resonance piezoelectric sensor resonance frequency measurement method, which is the following: according to the linear relationship between direct bias voltage and piezoelectric micro structure in certain range of the excitation signal, it uses exciting signal to excite the piezoelectric structure and uses data collection card to get maximum range value and direct bias voltage V#-[DC] and V#-[DC1] relative to the maximum range value; then it gets the resonance frequency altered value according to differential value of V#-[DC] and V#-[DC1].

The invention provides a motor comprehensive control apparatus based on (Advanced RISC Machines) and DSP (digital signal processor), comprising a voltage and current detection circuit (6), an A/D (analog-to-digital) converter (11), a DSP processor (17), a PWM (Pulse Wavelength Modulation) drive circuit (3), a double-port RAM (Random Access Memory) (16), a CPLD (Complex Programmable Logic Device) (19), an ARM processor (15) and an LCD (liquid crystal display) touch screen (18), wherein the voltage and current detection circuit (6) detects the voltage and current of a controlled motor (7); the signal output of the voltage and current detection circuit (6) is connected with the DSP processor (17) via the A/D converter (11); the DSP processor (17) is connected with one end of the double-port RAM (16), while the other end of the double-port RAM (16) is connected with a motor control signal end of the ARM processor (15); a human-machine interface control end of the ARM processor (15) is connected with the LCD touch screen (18); and the output of the DSP processor (17) changes the state of the motor (7) through the PWM drive circuit. The motor comprehensive control apparatus provided by the invention simplifies the detection system of the controller, greatly improves the universality of controller, saves system hardware resource and improves working efficiency and reliability of the controller.

The invention relates to a hybrid magnetic shielding device based on a high temperature superconducting coil. The invention aims at providing a shielding device which has a good shielding capability, has no amplitude dependent performance and is convenient to move. The device comprises an upper computer, a flux-gate meter, three high precision current sources, a superconducting ring and a triaxial Helmholtz coil. A control signal output terminal of the upper computer is connected to control terminals of an x axis high precision current source, a y axis high precision current source and a z axis high precision current source respectively. Current output terminals of the x axis high precision current source, the y axis high precision current source and the z axis high precision current source are connected to three coils with different dimensions on the triaxial Helmholtz coil respectively. A center position of the triaxial Helmholtz coil is provided with the superconducting ring. A center position of the superconducting ring is provided with a three-dimensional flux-gate probe. A signal output terminal of the three-dimensional flux-gate probe is connected to a signal receiving terminal of the flux-gate meter. A signal output terminal of the flux-gate meter is connected to a feedback signal receiving terminal of the upper computer.

The invention provides a portable airtightness test method. Direct testing is performed through pressure, and the detection system is simple and has low requirement for the use environment and is easyto operate and convenient to transport. The air outlet of the tested product is blocked and then the tested product is inflated. After completion of inflating, the leakage quantity in a certain period of time is compared with the maximum leakage quantity calculated according to the equivalent content volume of the tested product within the period of time so as to determine whether the airtightness of the tested product qualified or not. In the course of testing, if the airtightness of the tested product is not qualified, the tested product is put into the water under the condition of being inflated to observe whether there are bubbles, and the place where the bubbles exist is the leakage point.

A method for full-field measurement using Doppler imaging, comprising the following steps: turning on a laser and adjusting the laser; adjusting a spatial filter to obtain circular laser spots having uniform intensity distribution; adjusting a quarter-wave plate and a whole polarizer in a system, and requiring two beams in a reference object and a measured object having different frequencies and perpendicular polarization directions; applying slight pressure to the measured object, setting a charge coupled device (CCD) camera into a continuous acquisition mode, observing interference fringes, and adjusting a light path so that the fringes are clear and visible; setting the sampling frequency, sampling time, captured image format and resolution size of the CCD camera; turning on a lithium niobate crystal drive power switch to produce a heterodyne carrier frequency; applying continuous equal pushing force to the measured object by means of piezoelectric ceramics (PZT) so as to make the measured object produce continuous bending deformation; controlling the CCD camera to sample using a computer, and collecting a set of time series light interference images along with the continuous deformation of the measured object; and processing the time series light intensity interference image to obtain a three-dimensional data module comprising continuous deformation of the measured objects distributed in time and space.

The invention discloses a method for detecting a carcinoembryonic antigen by a nano-probe-induced enzyme polymerization amplification electrochemical aptamer sensor. The method comprises that the surface of a gold nanoparticle are modified through an end 5' mercapto-labeled carcinoembryonic antigen aptamer signal probe so that a nanoprobe is prepared, a layer of end 3' mercapto-labeled carcinoembryonic antigen aptamer capture probes modifies the surface of a gold electrode, after addition of a carcinoembryonic antigen and the nanoprobes, the 3' mercapto-labeled carcinoembryonic antigen aptamer capture probe, the carcinoembryonic antigen and the end 5' mercapto-labeled carcinoembryonic antigen aptamer signal probe are specifically bonded so that the exposed end 3' is formed on the electrode surface and the tail end is extended, then an avidin-labeled horseradish peroxidase is specifically bonded to the electrode surface, and change of an electrochemical signal produced by a horseradish peroxidase catalytic electrolyte is detected so that high sensitivity and high specificity detection of a carcinoembryonic antigen is realized. The method is used for early diagnosis of tumors, curative effect judgment, disease progression, monitoring and prognosis estimation.

Caged compounds, i.e. synthetic chemical compounds whose chemical or biochemical activity is normally controlled by photolysis to release an active moiety to participate in a chemical or biochemical reaction, are subjected to electrical current instead of light to release the active moiety. The process is especially useful in chemiluminescent biochemical assays, where it is required to measure the light output in order to quantify the analyte under measurement, since avoids confusion between input energy to trigger the reaction, and light output for measurement purposes.

A method for full-field measurement using Doppler imaging, comprising the following steps: turning on a laser and adjusting the laser; adjusting a spatial filter to obtain circular laser spots having uniform intensity distribution; adjusting a quarter-wave plate and a whole polarizer in a system, and requiring two beams in a reference object and a measured object having different frequencies and perpendicular polarization directions; applying slight pressure to the measured object, setting a charge coupled device (CCD) camera into a continuous acquisition mode, observing interference fringes, and adjusting a light path so that the fringes are clear and visible; setting the sampling frequency, sampling time, captured image format and resolution size of the CCD camera; turning on a lithium niobate crystal drive power switch to produce a heterodyne carrier frequency; applying continuous equal pushing force to the measured object by means of piezoelectric ceramics (PZT) so as to make the measured object produce continuous bending deformation; controlling the CCD camera to sample using a computer, and collecting a set of time series light interference images along with the continuous deformation of the measured object; and processing the time series light intensity interference image to obtain a three-dimensional data module comprising continuous deformation of the measured objects distributed in time and space.

The invention discloses a device and method for detecting component concentration of mixed gas and application, the temperature of the mixed gas in a measuring gas chamber is regulated to be T1, a heating element is heated to the temperature of T1 + delta T, the temperature of the mixed gas is measured at the position with the distance L from the heating element, and the heating power of the heating element is fed back and adjusted, the temperature of the heating element is kept constant, so that the heat dissipated by gas heat conduction is equal to the electric power consumed by keeping the temperature of the heating element constant, and the heat conductivity coefficient of the combined gas can be measured. When mixed gas to be measured is sequentially adjusted to a plurality of temperatures, the heat conductivity coefficient of the mixed gas is measured by adopting the method, and then a multivariate linear equation set is established according to the heat conductivity coefficient of gas with known component types. The equation number of the equation set is greater than or equal to the number of unknown quantities to be measured, namely the gas concentration, and the linear equation set is solved according to a least square method to obtain the concentration of each gas in the mixed gas.

The invention discloses an intelligent well completion system based on optical fiber monitoring and layered flow control. The intelligent well completion system comprises a ground signal processing subsystem, a ground hydraulic subsystem, an underground dynamic monitoring subsystem and a plurality of flow control devices. The underground dynamic monitoring subsystem comprises a sensing optical fiber and a plurality of optical fiber sensor assemblies; the sensing optical fiber is arranged in an oil well casing in a penetrating mode and extends along an oil well; and the optical fiber sensor assemblies are fixedly arranged on the outer wall of an oil pipe and connected with the sensing optical fiber. The ground signal processing subsystem is electrically connected with the ground hydraulic subsystem through a control cable. The flow control devices are connected with the oil pipe and the ground hydraulic subsystem. The invention further provides an intelligent well completion method based on optical fiber monitoring and layered flow control. Underground distributed monitoring is realized, production halt monitoring is not needed, and the measurement cost is reduced. The detection precision is improved, and the monitoring system and the monitoring method which are high in reliability and high in stability are realized.

The invention discloses a communication detection system of a communication module. The system comprises a startup power supply, a BMS, a communication module, a monitoring platform and a display unit, wherein the startup power supply is connected to the BMS, the communication module and the display unit; the BMS is connected to the display unit; the communication module communicates with the BMSand the monitoring platform; when the startup power supply is turned on, the startup power supply supplies power to the BMS, the communication module and the display unit; the BMS transmits a detection signal to the communication module, and if the BMS does not receive a feedback signal sent by the monitoring platform within a first preset time, the BMS transmits an alarm signal to the display unit, and the display unit displays the alarm signal to inform a user that the communication module has a communication failure. According to the communication detection system of the communication module disclosed by the invention, whether the communication module has the communication failure can be detected.

The invention discloses a lithium battery fault detection system and relates to the technical field of lithium batteries. The system comprises a test data acquisition module, a test data processing module, a test identification parameter solving module, an actual detection data acquisition module, an actual detection data processing module, an actual detection identification parameter solving module and an identification parameter comparison module. On the one hand, the least square method is adopted to identify the system parameters, the physical significance of the system parameters does not need to be obtained, and the first type of the current lithium battery to be detected can be obtained only by solving and comparing the system parameters with various first types of system parameters; on the other hand, the detection system is simple, the lithium battery detection system is optimized, the lithium battery detection speed is increased, and the fault type can be visually detected; the system can be widely applied to battery fault detection, and can also be applied to battery qualification detection.