41results about How to "Accurate and stable measurement results" patented technology

The invention relates to a device for detecting dynamic specific oxygen utilization rate (SOUR) of an activated sludge system, belongs to the theory and technique of strengthening biological denitrification treatment with an activated sludge process, and designs a set of on-line detection device for simultaneously feeding back the activated sludge specific oxygen utilization rate of SBR process by aiming at the problems of off-line measurement, hysteresis quality and unavailable on-line detection and feedback and the like existing in the traditional method for measuring the oxygen utilization rate. The system is most characterized in that a sealed recorder jar is put on a magnetic stirring apparatus and a sludge circulating loop is formed through a reflux pump and a reactor; sensors are dissolved oxygen sensors and two sensors are respectively put in the sealed recorder jar and an SBR reactor so as to be capable of realizing the on-line detection of SOUR and the simultaneous feedback. The device is concise in design, stable in operation and good in reproduction quality of measured data, and can accurately monitor the reactive states of the system at different time by intuitively representing the SOUR curve.

The invention relates to a wave-aberration indoor detection method of a large-caliber photoelectric detection system at different elevations. An objective target plate and illumination system, a small-caliber collimating optical system with a variable diaphragm, a first turning beam-splitting prism, a second turning beam-splitting prism, a measuring head third turning beam-splitting prism, a measuring head first beam-splitting prism, a second beam-splitting prism, a first photoelectric auto-collimator, a third beam-splitting prism and a second photoelectric auto-collimator are successively arranged on a detection optical path. According to the technical scheme of the invention, the wave-aberration indoor detection method of the large-caliber photoelectric detection system at different elevations is mainly used for detecting the wave aberration of the large-caliber photoelectric detection system at different elevations. In this way, the imaging quality at different elevations and the stability quantitative assessment thereof are realized.

The invention relates to an overall imaging technology of an underwater object and particularly relates to a detecting system and a detection method for the overall dimension of an underwater part of a ship. According to the detection system and the detection method, an image processing method for combining a laser technology with a shooting technology is applied; the underwater part of a ship body is scanned by adopting a laser beam to form a laser illumination line; the underwater shooting device is used for acquiring image scanning information; and image data are processed and three-dimensional outline information of the ship body is calculated by adopting an arithmetic algorithm. The detection system disclosed by the invention is low in construction difficulty; the process of the detection method is controlled by adopting full automation without being influenced by subjectivity of a measurer; during detection, the equipment is not needed to be carried on the ship or enter the water bottom; the measuring system is simple in structure and is convenient and quick in operation; and a measuring result is accurate and stable and important reference for smooth navigation and the safety of persons, the equipment, the ship and a channel is provided.

The invention relates to a method for detecting a dynamic specific oxygen utilization rate of an activated sludge system, belonging to a theory and a technology for enhancing a biological nitrogen removal process by activated sludge process. Aiming at the problems of a traditional method for measuring the oxygen utilization rate such as off-line measurement, hysteresis quality, no on-line measurement and on-line feedback, and the like, the invention provides a method for detecting the specific oxygen utilization rate of the activated sludge system with on-line measurement and on-line feedback. The invention has the following creative features that a programmable controller and a measuring system are used for on-line monitoring the specific oxygen utilization rate of the activated sludge and effectively representing a SBR technical biochemical reaction process; wherein, when the specific oxygen utilization rate is lower than a set value, the controller judges according to a feedback signal so as to transmit a control signal to a fan to stop aeration. The invention has the advantages of simple operation, sensitive response, etc. By detecting the index, the invention can timely feed back the operation information in the process of aerating, therefore establishing a theoretical base and a data support for realizing real-time control which uses the specific oxygen utilization rate as a parameter.

The invention discloses a vibration wire type sensor reader measuring meter. The vibration wire type sensor reader measuring meter comprises a data acquisition terminal with a single-chip microcomputer as a controlling center and an upper computer, wherein the data acquisition terminal comprises a shock excitation circuit, a signal amplifying and shaping circuit, a temperature acquisition circuit, the single-chip microcomputer and a signal transmission circuit; the shock excitation circuit adopts a high-voltage method to enable a vibration wire type sensor to generate resonance; frequency signals outputted by the vibration wire type sensor are amplified and shaped by the signal amplifying and shaping circuit; the temperature acquisition circuit is used for measuring the value of the negative characteristic thermistor of the vibration wire type sensor provided with temperature correction; a frequency measuring module and a temperature measuring module are arranged inside the single-chip microcomputer, and the single-chip microcomputer is used for controlling the shock excitation circuit, acquiring signals outputted by the signal amplifying and shaping circuit and signals outputted by the temperature acquisition circuit to calculate and obtain the measured temperature value and frequency value; the signal transmission circuit is used for transmitting the measured temperature valve and frequency value which are calculated and obtained by the single-chip microcomputer to the upper computer; an engineer management module is arranged inside the upper computer. According to the invention, the vibration wire type sensor reader measuring meter can be used for measuring the vibration wire type sensors in large-scale projects.

An automobile air conditioning air outlet assembly assembling and detecting device comprises a working table plate, a vertical blade connecting rod assembling mechanism, a horizontal blade connecting rod assembling mechanism, a shell transplant assembling mechanism, an air outlet assembly detecting mechanism and a control case. The shell transplant assembling mechanism is arranged on the working table plate and can move a shell from above the vertical blade connecting rod assembling mechanism to above the horizontal blade connecting rod assembling mechanism. The shell transplant assembling mechanism is provided with a vertical cylinder of which the power output end is vertically downward, and the power output end of the vertical cylinder is provided with a shell clamping cylinder. The air outlet assembly detecting mechanism is arranged on the working table plate and can detect whether components of an air outlet assembly are assembled in place. Compared with the prior art, as assembling and detecting are integrated, component missing inspection is automatically completed after assembling, the assembling quality of products is ensured, and the work efficiency is greatly improved.

The invention provides a direct-current cable space charge measuring system which comprises a space charge measuring unit, a heating unit, a temperature control unit, a high-voltage direct-current power source and a pulse generator. The space charge measuring unit, the heating unit and the temperature control unit are all arranged on a direct-current cable, and both the high-voltage direct-current power source and the pulse generator are connected with the direct-current cable through direct-current cable terminals. Through the coupled current heating direct-current cable, a temperature field which transmits heat from inside to inside and from a cable core to a cable insulation shell is realized, the actual working conditions of the direct-current cable are simulated, and a sensor is prevented from bearing high temperature through a heat insulation layer.

The invention discloses a signal processing method for eliminating velocity ambiguity in velocity measurement using a pulse coherence method. The signal processing method comprises steps of: dividinga velocity space into a plurality of velocity sections and using a section median as a base velocity; obtaining the roughly measured velocity of a target by using a time difference of the two echoes of the target so as to search for the velocity section and determine the base velocity; obtaining a precise time delay by using a phase difference of the two echoes so as to calculate a velocity offset; adding the base velocity to the velocity offset to obtain an original pre-measured velocity; adding an artificial time delay to one of the echo signals in order that the measured velocity generatesan artificial velocity offset, re-determining the base velocity and the velocity offset, adding the base velocity and the velocity offset to obtain a delayed pre-measured velocity; subtracting the corresponding artificial velocity offset from the delayed pre-measured velocity to obtain a corrected delayed pre-measured velocity; calculating the weighted average of the original pre-measured velocityand the corrected delayed pre-measured velocity to obtain a final velocity measured value.

The invention discloses an intelligent sensing device of a zinc oxide arrester tester. The intelligent sensing device of the zinc oxide arrester tester comprises a host, a micro printer, a charging socket, a measurement ground terminal, a power supply switch, a touch keyboard, a large-screen liquid crystal display and an input end, wherein the input end comprises a reference voltage input end and a current input end; the current input end comprises an A phase leakage current input end, a B phase leakage current input end and a C phase leakage current input end; the micro printer, the charging socket, the measurement ground terminal, the power supply switch, the touch keyboard, the large-screen liquid crystal display and the input end are mounted on the host. The intelligent sensing device of the zinc oxide arrester tester is simple to operate and convenient to use, and can be used for measuring total current, resistance current, harmonic wave, power frequency reference voltage, active power and phase difference of a zinc oxide arrester; the large-screen liquid crystal display can be used for displaying real waveform of the voltage and the current; through the application of the digital waveform analysis technology, the measurement results are accurate and stable by using anti-interference methods such as a harmonic wave analysis method and a digital filtering method.

The invention relates to a special protein testing method and a special protein testing device. The testing method includes the steps: adding reagents into special protein and mixing the reagents and the special protein into reaction liquid; acquiring the scattered light value of the reaction liquid and forming a reaction curve according to the relation between the scattered light value and time; linearly fitting the reaction curve to obtain inflection point values of the reaction curve; obtaining calibration coefficients by a five-point calibration method corresponding to the inflection point values of the reaction curve; and computing the concentration of the special protein according to the relation among the obtained calibration coefficients, the preset scattered light value and the concentration of the special protein. By the aid of the special protein testing method and the special protein testing device, the concentration of the special protein can be rapidly tested, testing efficiency is improved, smoothness of the curve is enhanced by linearly fitting the reaction curve, and measuring results are accurate and stable.

The invention discloses a method for quickly determining the type of lithium salt in the electrolyte of a lithium ion battery, which mainly uses ion chromatography to measure LiPF6, LiBF4, LiClO4, LiBOB and other lithium salts with a concentration in the range of 5-100 mg / L standard solution, respectively to obtain the standard retention time of various lithium salt anion peaks; then add deionized water to the electrolyte sample to be tested and dilute until the lithium salt concentration is in the standard concentration range, and then use ion chromatography to determine the lithium salt standard solution The same test conditions test the peak retention time of the lithium salt anion, and compare the retention time with the standard retention time to determine the type of lithium salt in the electrolyte. The electrolytic solution of the present invention does not need pretreatment, and the test process is fast and simple, and the types of various lithium salts in the electrolytic solution can be determined simultaneously, and the measurement result is accurate and stable.

The invention discloses a device and a method utilizing icebound embolisms to plug a drill hole in a subsection mode. The device comprises a high-pressure air cylinder, a single-way valve, a pressure gage and a plugging device, the plugging device comprises a freezing brine tank, a heat preservation water inlet guide pipe, a heat preservation water outlet guide pipe, a first embolism, a second embolism, a floral tube and a water valve, and the high-pressure air cylinder, the single-way valve, the pressure gage and the freezing brine tank are communicated in sequence. The first embolism is connected with the second embolism through the floral tube, and the freezing brine tank, the first embolism and the second embolism are successively communicated through the heat preservation water outlet guide pipe. The device is simple in structure, low in cost and easy to operate, utilizes the method that the drill hole is plugged through the icebound embolism to resolve the problem that seal performance is poor when the drill hole is plugged through a embolism, effectively resolves the problems of water leakage of the embolism and too large leakage measuring parameters caused by leakage flowing around the embolism, and enables measured results to be accurate and stable.

The invention discloses a method for cleaning a glass electrode used for on-line measurement of pH value of drilling fluid, aiming at solving the problem of inaccurate measuring result due to easy pollution even scaling of sensitive portions of the electrode when on-line glass electrode is used for measuring the pH value of the drilling fluid in petroleum drilling. The method adopts polyacrylamide and a dilute solution of surfactant as the cleaning fluid, and uses a method of spray cleaning, thus the glass electrode can be cleaned effectively, and the accurate and long-term on-line measurement of the pH value of the drilling fluid is guaranteed. According to the method, the service life of the glass electrode can satisfy the requirement of on-line measurement. The addition of polyacrylamide is 0.01-0.1 %, and the addition of the surfactant is 1-5 %. Polyacrylamide can be homopolymer and also can be partially hydrolyzed polyacrylamide. The surfactant is nonionic.

The invention discloses a surface photovoltage method based semiconductor material parameter testing device and testing method. The testing device comprises a casing, a cantilever, a measuring probe and a sample bench, wherein the measuring probe is internally provided with an infrared laser and a sensing electrode slice; a pulse light source driver is positioned inside the casing; a semiconductor material sample to be tested is arranged on the sampling bench; the measuring probe is right over the sample to be tested; the sensing electrode slice is connected with a charge amplifier through a coaxial cable wire; and the infrared laser is connected with the pulse light source driver through a two-core shield wire. The testing method is as follows: the pulse light emitted by the infrared laser is vertically irradiated on the sample, the sensing electrode slice receives the static charge generated by the weak photovoltage on the surface of the sample for transmitting to the input end of the charge amplifier, and a liquid crystal display screen displays the conductive type and resistivity / sheet resistance values of the sample to be tested after the static charge is processed by a signal processing circuit. The testing device provided by the invention has the advantages of small volume, light weight, small power consumption and low cost.

The invention discloses a polymer molecular weight testing device and testing method. The polymer molecular weight testing device consists of two parts: a dissolution mechanism and a testing mechanism. The dissolution mechanism includes a heat collection type constant temperature heating magnetic stirrer, an iron stand, a test tube holder, a three-necked flask, an intake pipe, an outlet pipe, a rubber tube, a nitrogen gas cylinder, and a thermometer; and the three ports of the three-necked flask are connected to the inlet pipe, the outlet pipe and the thermometer separately. The testing mechanism includes an intelligent thermostatic bath, an iron stand, test tube holders, Ubbelohde viscometers, a bubble level, and a rubber tube; and the Ubbelohde viscometers are vertically fixed in the intelligent thermostat bath through the test tube holders, and the height of a plurality of Ubbelohde viscometers are kept consistent, so as to accurately measure the time of the solution flows through the upper and lower scale lines of the measuring ball of the Ubbelohde viscometer, thereby obtaining the intrinsic viscosity of the solute, and calculating the viscosity average molecular weight of thesolute according to the Mark-Houwink equation.

The invention discloses a six-degree-of-freedom series robot tool based on a genetic algorithm and a rapid calibration method for zero error. The invention relates to a universal six-axis industrial robot zero error calibration and a TCP tool calculation method. It mainly solves two problems existing in the existing calibration technology. 1. The commercial calibration method is expensive to calibrate the instrument; 2. If the simple calibration method introduces sample data with large errors, the accuracy and test difficulty will be greatly increased. The present invention adopts: 1) the DH parameter modeling method to establish the actual model of the robot; 2) adopting the space-to-point method, aligning the end of the robot to the same point N times (N≥4), and recording the joint axis data of N points; 3) Establish an error model based on the genetic algorithm to find the optimal error parameters of the robot's zero error; 4) Optimize the zero error parameters by exhaustive method; 5) Calculate the TCP tool value after compensating the zero error parameters. The invention is applied to the field of robot error calibration methods.

The invention relates to a novel soil moisture sensor, which comprises a sensing probe formed by a plate capacitor, the input terminal of the sensing probe is connected to an oscillation signal generator, the output terminal is connected to a demodulation unit, the output of the demodulation unit is connected to an isolation amplifier, the output of the isolation amplifier is connected to a rectification unit, the output of the rectification unit is connected to a microprocessor, and the microprocessor is connected to a display and a wireless communication module. The soil moisture sensor can obtain the water content in soil in a real time mode, the measure result is accurate and stable, and the soil moisture sensor is suitable for soil in most regions in our country, the cost is low, and the soil moisture sensor enables popularization and usage at each region.

The invention discloses a six-degree-of-freedom series robot tool and zero error rapid calibration method based on a genetic algorithm, and relates to a universal six-axis industrial robot zero error calibration and TCP tool calculation method. The six-degree-of-freedom series robot tool and zero error rapid calibration method mainly solves the two problems existing in the existing calibration technology: 1, the price of a calibration instrument in a commercial calibration method is high; and 2, if the simple calibration method introduces sample data with large errors, the accuracy and the test difficulty are greatly increased. The method comprises the following steps: 1) establishing an actual robot model through a DH parameter modeling method; 2) aligning the tail end of a robot to the same point for N times (N is greater than or equal to 4) by adopting a space point alignment mode, and recording joint axis data of N points; 3) establishing an error model based on the genetic algorithm to find an optimal error parameter of the zero error of the robot; 4) optimizing a zero error parameter through an exhaustion method; and 5) calculating a TCP tool value after compensating the zero error parameter. The method is applied to the field of robot error calibration methods.

The invention discloses a method for detecting the pretightening force of a high-strength bolt. The method comprises the following steps: performing acoustic characteristic research on a high-strength bolt and a nut, processing a received pulse signal, performing normalization processing on a time domain signal of the pulse signal, then performing power function fitting to obtain the relationship between the pretightening force of the high-strength bolt and fixed-point acoustic time t, and obtaining the pre-tightening force of the high-strength bolt according to the fixed-point sound time t. According to the method for detecting the pre-tightening force of the high-strength bolt, the equipment is light, the detection efficiency is high, and a convenient, accurate and rapid measurement mode is provided for detection of the pre-tightening force of the high-strength bolt.

An automobile air conditioning air outlet assembly assembling and detecting device comprises a working table plate, a vertical blade connecting rod assembling mechanism, a horizontal blade connecting rod assembling mechanism, a shell transplant assembling mechanism, an air outlet assembly detecting mechanism and a control case. The shell transplant assembling mechanism is arranged on the working table plate and can move a shell from above the vertical blade connecting rod assembling mechanism to above the horizontal blade connecting rod assembling mechanism. The shell transplant assembling mechanism is provided with a vertical cylinder of which the power output end is vertically downward, and the power output end of the vertical cylinder is provided with a shell clamping cylinder. The air outlet assembly detecting mechanism is arranged on the working table plate and can detect whether components of an air outlet assembly are assembled in place. Compared with the prior art, as assembling and detecting are integrated, component missing inspection is automatically completed after assembling, the assembling quality of products is ensured, and the work efficiency is greatly improved.

The invention provides a blood pressure measuring device with a blood pressure deep measuring function and a data processing method thereof. The data processing method comprises the following steps ofS1, selecting a blood pressure measuring mode; when the common measuring mode is selected, enabling a blood pressure measuring module to measure once, and executing step 4; when a deep measuring modeis selected, enabling the blood pressure measuring module to continuously measure the blood pressure information for multiple times at certain interval; S2, transferring the information in the measuring process to a signal processing module; S3, after the measuring is performed for multiple times, enabling the signal processing module to analyze the information and multi-time measuring results inthe measuring process; S4, enabling a signal display module to display the analyzed and processed measuring results. The data processing method has the advantage that by changing the measuring type and the blood pressure calculation type, the measuring result can be processed and analyzed, the pulsation wave data in the multi-time measuring process can be processed, and the more accurate and stable measuring results can be conveniently obtained, so that a user can more conveniently know the self blood pressure condition.

The invention relates to a method for detecting a dynamic specific oxygen utilization rate of an activated sludge system, belonging to a theory and a technology for enhancing a biological nitrogen removal process by activated sludge process. Aiming at the problems of a traditional method for measuring the oxygen utilization rate such as off-line measurement, hysteresis quality, no on-line measurement and on-line feedback, and the like, the invention provides a method for detecting the specific oxygen utilization rate of the activated sludge system with on-line measurement and on-line feedback. The invention has the following creative features that a programmable controller and a measuring system are used for on-line monitoring the specific oxygen utilization rate of the activated sludge and effectively representing a SBR technical biochemical reaction process; wherein, when the specific oxygen utilization rate is lower than a set value, the controller judges according to a feedback signal so as to transmit a control signal to a fan to stop aeration. The invention has the advantages of simple operation, sensitive response, etc. By detecting the index, the invention can timely feed back the operation information in the process of aerating, therefore establishing a theoretical base and a data support for realizing real-time control which uses the specific oxygen utilization rate as a parameter.

The invention relates to an overall imaging technology of an underwater object and particularly relates to a detecting system and a detection method for the overall dimension of an underwater part of a ship. According to the detection system and the detection method, an image processing method for combining a laser technology with a shooting technology is applied; the underwater part of a ship body is scanned by adopting a laser beam to form a laser illumination line; the underwater shooting device is used for acquiring image scanning information; and image data are processed and three-dimensional outline information of the ship body is calculated by adopting an arithmetic algorithm. The detection system disclosed by the invention is low in construction difficulty; the process of the detection method is controlled by adopting full automation without being influenced by subjectivity of a measurer; during detection, the equipment is not needed to be carried on the ship or enter the water bottom; the measuring system is simple in structure and is convenient and quick in operation; and a measuring result is accurate and stable and important reference for smooth navigation and the safety of persons, the equipment, the ship and a channel is provided.

The invention relates to an indoor detection method of wave aberration under different elevation angles of a large-diameter photoelectric detection system. On the detection optical path, there are sequentially arranged: a target plate and an illumination system; a small-diameter collimation optical system with a variable aperture; the first A deflection beam-splitting prism; a second deflection beam-splitting prism; a third deflection beam-splitting prism in the measuring head; a first beam-splitting prism in the measuring head; a second beam-splitting prism; a first photoelectric autocollimator; Three beam splitting prisms; second photoelectric autocollimator. The indoor detection method of the wave aberration at different elevation angles of the large-aperture photoelectric detection system of the present invention is mainly used for the wave aberration detection of the large-aperture photoelectric detection system at different elevation angles, and can realize the quantitative evaluation of the imaging quality and its stability at different elevation angles.

The invention provides a method for calculating a rotation error and a roundness error of a hybrid four-point method based on a three-point method. The method comprises the steps of: firstly, measuring radial runout at different circumferential positions by means of four displacement sensors, dividing four paths of signals into three groups, calculating each order harmonic Fourier coefficients ofthe roundness error by applying a three-point method error separation technology on each group to obtain three groups of estimated values, selecting the group with the maximum transfer matrix determinant value for each order harmonic, and determining the Fourier coefficients in the group with the maximum transfer matrix determinant value as Fourier coefficient calculated values of the present order of the final roundness error; acquiring a final roundness error estimated value through inverse Fourier transform according to the determined Fourier coefficients of each order; and subtracting a radial runout measured value and the roundness error estimated value to obtain a rotation error estimated value of a principal axis in a direction. The method can separate the rotation error and roundness error more precisely and stably, can perform real-time online monitoring, and has better inclusivity for included angles among the sensors.

The invention discloses a breathing rate extraction method, comprising: obtaining an original electrocardiogram signal, and obtaining an electrocardiogram signal to be processed after the power frequency notch of the original electrocardiogram signal; performing Kalman on the electrocardiogram signal to be processed filtering, extracting the first respiration signal, and calculating the first respiration rate at the current moment according to the first respiration signal; performing wavelet transformation on the to-be-processed ECG signal to obtain a second respiration signal, and obtaining the second respiration signal according to the second The respiration signal is calculated to obtain the second respiration rate at the current moment; based on the Kalman residual generated in the Kalman filtering process, the first weight factor corresponding to the first respiration signal is calculated; based on the signal quality index, the The second respiration signal is analyzed to obtain the corresponding second weight factor; the respiration rate at the current moment is obtained through calculation. The invention also discloses a respiration rate extraction device, which can conveniently and effectively extract respiration signals, and obtain accurate and stable respiration rate through calculation.

The invention relates to a special protein testing method and a special protein testing device. The testing method includes the steps: adding reagents into special protein and mixing the reagents and the special protein into reaction liquid; acquiring the scattered light value of the reaction liquid and forming a reaction curve according to the relation between the scattered light value and time; linearly fitting the reaction curve to obtain inflection point values of the reaction curve; obtaining calibration coefficients by a five-point calibration method corresponding to the inflection point values of the reaction curve; and computing the concentration of the special protein according to the relation among the obtained calibration coefficients, the preset scattered light value and the concentration of the special protein. By the aid of the special protein testing method and the special protein testing device, the concentration of the special protein can be rapidly tested, testing efficiency is improved, smoothness of the curve is enhanced by linearly fitting the reaction curve, and measuring results are accurate and stable.

The invention is suitable for the related technical field of soil texture detection equipment, and provides a multifunctional unsaturated soil in-situ matrix suction measuring instrument. Themultifunctional unsaturated soil in-situ matrix suction measuring instrument comprises a PC (Personal Computer) end, a cable, a data collector, a power supply device, a signal stability augmentation device and a thermal conductivity suction sensor; the PC end, the cable, the data collector, the power supply device, the signal stability augmentation device and the thermal conductance suction force sensor are connected through the cable, the thermal conductance suction force sensor comprises a circuit bottom plate and a detachable probe, and the in-situ matrix suction force measuring instrument is accurate in measurement, easy to operate, easy to carry and rich in function.