73results about How to "Does not affect measurement" patented technology

The invention provides a thin-layer flow electrolytic cell applicable to electrochemical in-situ Raman spectrum detection. The thin-layer flow electrolytic cell employs the design of a semispherical window; and a solution flows in a right solution channel, a solution chamber and a left solution channel, thereby forming the flow electrolytic cell. Through introduction of the flowing function, the thickness of a solution layer between a working electrode and the window can be substantially reduced, so collection efficiency and detection sensitivity of Raman scattered light are greatly improved while electrochemical measurement is not influenced. Meanwhile, the design of the semispherical window can eliminate the refraction effect of an interface of air and the quartz window, reduce difference between the focus of a laser optical path and the focus of an optical imaging optical path and decreases divergence angles of light, so acquisition efficiency and detection sensitivity of Raman spectra are improved. The thin-layer flow electrolytic cell can monitor dynamic changes of surface adsorbed species in the process of an electrochemical reaction in situ in a wide temperature range and obtains inherent information of surface adsorbed substances related to parameters of reaction kinetics.

The invention discloses a flexible cell management system and belongs to the cell management and energy storage field. The flexible cell management system can realize flexible measurement, protection and management on cells of the cell groups, has low requirements for external voltages and can be directly connected with AC. The flexible cell management system comprises multiple cell management units connected in serial and in parallel, wherein each cell management unit comprises one or two cells and four or six switches, and can realize external port positive connection, reverse connection and bypass functions, and the switches can any type of diodes, triodes, relays, thyristors, silicon controlled rectifiers, MOS tubes and IGBTs and can also be combination of all the types above to form a bi-directional switch module or device. The flexible cell management system can be composed of multiple cell management units in series, in parallel, in series and then in parallel, in parallel and then in series, or in hybrid connection mode. The flexible cell management system has low requirements for external charging and discharging voltages and can even realize external AC charging and discharging, the flexible cell management system further improves reliability of the cell groups, and internal resistance can be easily and accurately measured.

The invention provides a near-field strong interference source inhibition method in an underwater far-field target passive positioning process. The method comprises the following steps of: before sonar equipment detects a far-field target, utilizing a near-field sound figure scanning method to extract the number N and position information of interference sources in a near-field area of the sonar equipment; building a model in which a near-field strong interference source exists when an underwater far-field target is detected, and calculating to obtain steering vectors of position coordinates on which i interference source is located; determining forms of a wave beam null width weight and an azimuth spectrum; judging whether a signal received by a receptive array belongs to a wideband signal or not; dividing the received wideband signal into a plurality of narrow-band signals on a frequency domain; and finally, synthesizing outputs of all frequency bands to obtain an estimation result of the wideband signal. According to the near-field strong interference source inhibition method in the underwater far-field target passive positioning process, local interference is regarded as a near field, a wave beam directive null point focused to a point is formed aiming at the position coordinates on which the near field is located, the concrete forms of the wave beam null width weight and the azimuth spectrum are provided, dead zone influence brought by the prior wave beam null width method is overcome, and meanwhile, a true target is regarded as a far field to be measured.

The invention discloses a flatness detection device based on civil engineering and relates to the technical field of civil engineering. A connecting box is fixedly connected to one side of a box body.Vertical frames are fixedly connected between the top and the bottom of the inner wall of the box body. The two vertical frames are arranged and located on the left side and the right side of the inner wall of the box body. A first electric telescopic piece is fixedly connected to the top and the bottom of one side of the inner wall of each vertical frame. By the adoption of the flatness detection device based on civil engineering, the device can be effectively triggered and stopped through a touch switch when an unstable condition happens, and stability is guaranteed; through mutual cooperation, whether flatness is reached or not can be known in time, observation is conducted, the accuracy in the measurement process is guaranteed, and work efficiency is improved; and the angles of pressswitch pieces correspond to those of squeezing blocks, the overall balance of the device can be guaranteed in the uphill and downhill processes, an inclination state is avoided, and the stability in the measurement process is guaranteed.

The invention provides a right angle calibration block layout method, a coordinate calibration method and a coordinate adjusting method for a gear measurement center. The layout method is to set the right angle calibration block layout fixed on the non-rotary table at a position other than the measurement stroke, and then use the reference template and the right angle calibration block to establish an indirect gear measurement center coordinate calibration method. The coordinate calibration method comprises steps of 1) preliminarily determining the position coordinates of the right angle calibration block in a rotation center; 2) determining the position coordinates of a probe in the rotation center; and 3) accurately determining the position coordinates of the right angle calibration block in the rotation center. The invention solves the problems that the coordinate calibration program in the traditional gear measuring system is complicated, the precision is low, the calculation method is complicated and the requirement for the positioning position of the probe is high; position coordinates of the tangential X axis, the radial Y axis and the vertical Z axis are precisely determined when the right angle calibration block is at the zero point relative to the rotation center; and the position coordinates of the center of sphere of the probe head relative to the measurement system are determined.

The invention discloses a fiber grating stress sensor which is not sensitive to temperature. A sensing head structure body (40), a first phosphor copper rod (32) and a fourth phosphor copper rod (60) are vertically fixed on the bottom part of a sealing body. The upper end surface of the sensing head structure body is contacted with the lower surface of a sliding cover (21). A second phosphor copper rod (42) is vertically stuck on the sensing head structure body (40). A third phosphor copper rod (52) is respectively connected with the fourth phosphor copper rod (60) and the second phosphor copper rod (42) by connecting pieces (50), (41). A measuring fiber raster (51) and a reference fiber grating (31) are respectively stuck on the third phosphor copper rod (52) and the first phosphor copper rod (32). The measuring fiber grating is connected with an optical power meter (90) through a right circulator. The reference fiber grating is connected with a broadband light source (80) through a left circulator. The sensor is not sensitive to temperature and is especially suitable for the running control of high-speed railway trains and the real-time tracing on trains.

The invention discloses a low-frequency pressure pulsation suppression method for a 3/4 opening test section of a wind tunnel. The wind tunnel is the 3/4 opening test section, the test section sequentially comprises a jet nozzle, a test section floor and a jet collector from one end to the other end, wherein a wall plate for inhibiting vortex development is arranged in an excitation source propagation path and a disturbance feedback loop at the downstream of the test section. The device is simple in structure, does not need to damage a wind tunnel body structure, is installed at the downstreamof a 3/4 opening test section, does not affect measurement of far-field noise after low-noise design and noise elimination measures are added, directly acts on a low-frequency pressure pulsation generation source, and can play a good role in restraining low-frequency pressure pulsation of different propagation paths.

The invention discloses a fibre grating stress sensing train positioning and real-time tracking system which is insensitive to temperature. The system of the invention is characterized in that a plurality of fibre grating stress sensors (A211...A21n)...(A211...A21n) with different central wavelengths are embedded just below one steel rail of each line of the railway with the interval of 100-500 meters. A broadband light source (A10) is connected with a fast optical switch (A20) and a first fibre grating stress sensor (A211...a2m1); a final fibre grating stress sensor (A21n...A2mn) is connected with an optical amplifier (A30), a wavelength-division element (A41), a high-speed optical switch (A42), an O/E converter (A43), a digital signal processing module (A44), a host computer (A45), as well as a server (A47) and a large screen (A46) which memorize three-dimensional electronic maps. The fibre grating stress sensing train positioning and real-time tracking system is suitable for the positioning and real-time tracking of the high-speed railway trains.

The invention relates to a method and device for measuring the mass of a solid in a solid and liquid mixture. The method comprises the following steps that a) the type of the solid in the solid and liquid mixture is determined, and the density Psolid of the solid is obtained by a table look-up or experiment method; b) the Volume Vmixutre and the mass Mmixture when the volume of the solid and liquid mixture equals Vm are measured; and c) according to that the volume of the solid and liquid mixture equals the sum of the volume of the solid and the volume of the liquid and that the mass of the of the solid and liquid mixture equals the sum of the mass of the solid and the mass of the liquid, an equation set is obtained, and values in the steps a) and b) are substituted into the equation set to obtain the Msolid. The method is simple and practical, realization approaches are diversified, both online measurement and static measurement can be realized, and the measuring precision is easy to control.

The invention relates to a thermal imager online calibration method under a space simulation environment. A space simulation container is arranged, a black body serving as a calibration device is arranged between the inner wall of the space simulation container and an interlayer of a heat sink and/or in the space simulation container, a test objective is arranged in the space simulation container,a thermal imager is arranged outside or inside the space simulation container, the relative positions of the thermal imager and the black body are adjustable, and by collecting an image of the blackbody, the thermal imager is calibrated online in real time. Accordingly, the calibration device can be flexibly moved in and out in a test, the purpose that in the same test ground, calibration on thethermal imager under the inside and outside circumferences and measurement on the objective can be achieved, and the measuring error is small.

The invention discloses a fiber asphalt mortar blending uniformity self-checking device and method. The device comprises a blending unit, a testing unit and a control unit connected with the blending unit and the testing unit, wherein the blending unit comprises a blending reaction pot arranged on a base, a sealing plate is arranged above the blending reaction pot, a blender is arranged at the bottom of the sealing plate, and a plurality of stirring rods are arranged on the blender; an electric heater is arranged on the blending reaction pot; the testing unit comprises viscosity sensors and temperature sensors which are arranged on the stirring rods; the control unit comprises a PLD (programmable logic device) controller connected with the electric heater and the viscosity sensors. The dispersion effect of fibers in fiber asphalt mortar is really reflected by comparing viscosity information of all the test points, capturing of the fiber distribution effect is realized according to mortar viscosity, the blank for detection of the fiber asphalt mortar blending effect in China is filled up, and the device and the method have great promotion value in production.

The invention discloses a high-pressure spray characteristic testing system for use at a high temperature and under a high back pressure. The testing system consists of a constant volume combustion chamber, a heating system, an ignition and fuel injection system, a synchronous control system, a transient high-temperature and high-pressure measurement system and a high-speed camera system. Before testing, the constant volume combustion chamber is heated to a target temperature by the heating system, fuel and air are mixed, and the mixed gas pre-burns to establish a high-temperature and high-back-pressure condition. In a high-temperature and high-back-pressure environment, a fuel injection system injects diesel into the constant volume combustion chamber, temperature and pressure sensors record relevant data, and the high-speed camera system shoots a spray form, thereby completely recording spray characteristic data. The testing system provided by the invention can detect the spray characteristics in a real engine environment. Fuel is injected into the constant volume combustion chamber firstly, and burns in the constant volume combustion chamber to increase the temperature and pressure in the constant volume combustion chamber. The testing environment is a high-temperature and high-back-pressure environment, which is consistent with an actual engine environment.

The invention relates to an oil well liquid level measuring method and device for oil well liquid level measurement. The method includes the following steps that a, a ground frequency converter outputs frequency f1, the rotation speed n of a submersible screw pump is obtained through calculation, n is substituted into the formula of T3=91.3delta0-n0.45+46.5, and the torque T3(f1) of the submersible screw pump is obtained through calculation; b, the total power supply output torque T1(f1) is measured through a ground torque tester; c, the torque T2(f1) of lifting liquid is calculated through the formula of T2(f1)=T1(f1)-T3(f1); d, the height h(f1) of the lifting liquid is calculated through the formula in the specification. According to the measuring device, a power supply is connected with the submersible screw pump through a cable by means of the torque tester and the frequency converter. The measurement method and device do not depend on echo location and improve measurement precision.

The invention relates to a sample plate positioning device of a total reflection X-ray fluorescence spectrometer, which comprises a sample plate frame located below a detector, the bottom surface of the sample plate frame can be pulled horizontally, and the sample plate is horizontally arranged on the bottom surface of the sample plate frame, and the A pressing device is provided under the bottom surface of the tray rack, and a horizontal positioning device is provided on both side frames of the sample tray rack. The invention solves the problem of sample loading and sample positioning of the total reflection X-ray fluorescence instrument of the horizontal sample loading system, the positioning device does not affect the incident and outgoing light, the structure is simple to operate, and the position is fixed.

The invention relates to a pile foundation detection system using a self-balancing method. The pile foundation detection system comprises an upper steel bar cage, a lower steel bar cage and a load box; the load box comprises an upper bottom plate and a lower bottom plate; the periphery of the lower side of the upper bottom plate is fixedly connected with a hoarding which can abut against the upper side of the lower bottom plate under normal conditions; the peripheral surfaces of the ends where the upper steel bar cage and the lower steel bar cage close to each other are fixedly connected with steel rings; a steel sleeve is arranged on the outer side of the load box, the lower end of the steel sleeve is fixedly connected to the steel ring of the lower steel bar cage, and the upper end of the steel sleeve is slidably connected to the steel sleeve of the upper steel bar cage; a filling cavity is formed between the steel sleeve and the two steel rings as well as the steel sleeve and the hoarding; and the upper side of the steel sleeve is further fixedly connected with a plurality of filling tubes which can extend out of the upper end of the upper steel bar cage and communicate with the filling cavity. The pile foundation detection system using the self-balancing method has the effects that broken piles after measurement can be effectively bonded, so that the upper pile part and the lower pile pat can be integrated into a whole so as to improve the bearing capacity of the broken piles, and the subsequent measurement and use are convenient.

The invention relates to the field of gene sequencing, and discloses a gene sequencing reaction device. The gene sequencing reaction device comprises a gene sequencing reaction small chamber and a temperature measuring device, wherein the temperature measuring device comprises a temperature measuring probe; the gene sequencing reaction small chamber comprises a first substrate and a second substrate, a first groove is arranged in the first substrate, and after the first substrate attaches to the second substrate, the first groove is a reaction channel; a reagent inlet and a reagent outlet arearranged in the second substrate; the reaction channel is composed of a reaction part and a bending part, the bending part is connected with and communicates with the reaction part, and an included angle is formed between the bending part and the reaction part; a bulge is arranged on the outer surface of the second substrate, and the bulge is arranged at the position corresponding to the joint ofthe reaction part and the bending part; a temperature measuring hole is formed in the bulge, and the temperature measuring hole is used for the temperature measuring probe. The gene sequencing reaction device has the beneficial effects that the distance between a lead connected to the temperature measuring probe and a reagent inlet pipeline is increased, so that the interferences between the leadand the reagent inlet pipeline are avoided.

The invention relates to the technical field of water quality acquisition, and particularly relates to a water environment parameter acquisition device and method. The device comprises a tank body, afiltering assemblies, a pH temperature sensor, a dissolved oxygen sensor, a turbidity sensor, a conductivity sensor and a cleaning and air blowing assembly, wherein the tank body is placed in an inclined mode, the liquid inlet end of the tank body is provided with a water inlet interface, the liquid outlet end of the tank body is connected with an overflow interface, the upper part of the tank body is provided with four sensor interfaces, the pH temperature sensor, the dissolved oxygen sensor, the turbidity sensor and the conductivity sensor are sequentially and respectively arranged at the four sensor interfaces of the tank body from the feeding end to the discharging end, and the middle parts of the four sensor interfaces are provided with filtering interfaces; the lower part of the tankbody is provided with four air blowing interfaces corresponding to the lower parts of the four sensor interfaces; the filtering assemblies are arranged on the filtering interfaces of the tank body; the cleaning and air blowing assembly comprises four cleaning and air blowing joints; and each cleaning air blowing joint is matched with a measuring probe to realize self-cleaning. The device has theadvantage that the self-cleaning and maintenance-free effects can be realized conveniently.

The invention discloses a mobile phone accessory and a mobile phone APP (application) capable of testing wind power and a wind direction. The mobile phone accessory is a device which is used for testing the wind power and the wind direction through a certain swing direction and swing angle generated by a capacitance pen, which is hung on a fixed support and can swing with the wind, under the action of the wind power, recording the wind power and the wind direction by an induction location of a mobile phone screen, and reading and displaying a wind power value and a wind direction value further by the mobile phone APP. The mobile phone accessory is simple in structure, small in size, convenient to carry, simple in operation and low in cost, and is suitable for real-time and site-specific application.

The invention provides a sensor intermittent type automatic brushing and cleaning device. The sensor intermittent type automatic brushing and cleaning device comprises a fixing frame, a cleaning wheel, an intermittent linkage device and a driving device, wherein the fixing frame, the cleaning wheel, the intermittent linkage device and the driving device are fixedly installed together with the sensor. The sensor intermittent type automatic brushing and cleaning device can perform intermittent type brushing and cleaning on the sensor and does not need to be in contact with the sensor at all times, the measurement sensitivity of the sensor is improved, and the probability of damage or breakdown to the sensor during cleaning is reduced. When the dirt does not form a stable state, brushing andcleaning are carried out in time without affecting the real-time measurement of the sensor, and the defect of inaccurate trend of historical data due to the fact cleaning is started only after the sensitivity of the sensor decreases is overcome, and the sensor intermittent type automatic brushing and cleaning device is more advantageous than regular, centralized and high-intensity automatic brushing and cleaning in the prior art.