49results about How to "Avoid detection bias" patented technology

A device used to detect heat isolation effect of construction material is prepared as dividing box body to be top body and bottom body and setting sample plate support between the two, arranging seal door and heating source at front surface and top surface of to body and setting the rest of top body to be hollow two-layer structure, setting bottom body to be two-layer wall structure, opening three observation hole on one side wall of bottom body and setting temperature transducer there and under sample plate support, connecting each said transducer to digital display thermometer and setting dislocated heat radiation holes on top body. The detecting method utilizing said device is also disclosed.

The invention discloses a multi-angle dynamic light scattering particle size distribution measuring device and method. The device comprises a laser device, a colorimetric dish, a rotary displacement table, a receiving module, a photon counter and a computing and processing module, wherein the colorimetric dish is used for containing nano-particle suspension liquid to be measured, the rotary displacement table is provided with an outer disc and an inner disc, the receiving module is located on the outer disc, rotates around the rotating axis with the outer disc and is used for receiving light scattered by the nano-particle suspension liquid to be measured at different angles, the photon counter is used for recording the information about the time-variable light intensity of the scattered light received by the receiving module at different angles, and the computing and processing module is used for computing the particle size distribution of nano-particles in the nano-particle suspension liquid to be measured according to the received scattered light and recorded time-variable light intensity information. The detecting deviation problem existing when different-angle dynamic light scattering information is detected by using multiple detectors is avoided, and the multi-angle dynamic light scattering particle size distribution measuring device is good in stability and high in measuring accuracy.

The invention discloses an on-line measurement system for shape parameters of wet particles based on light scattering. The on-line measurement system is used for measuring shape parameters of wet particles in a fluid flowing through a measuring pipeline in real time and comprises the following components: a laser which generates continuous laser light used for irradiating the wet particles; a paraboloidal reflector which has a paraboloidal reflection plane, wherein the focus of the reflector is located at a central axis of the measuring pipeline and the continuous laser light gathers at the focus after reflection by the reflection plane, which enables the wet particles located at the focus to emit diffusion light; and an ICCD detector, wherein the diffusion light is parallelly incident on the ICCD detector after reflection by the paraboloidal reflector, the ICCD detector acquires a scattering pattern of the wet particles and inputs the scattering pattern to a computer for processing so as to obtain a three dimensional scattering function, and the shape parameters of the wet particles can be obtained through inversion algorithm based on template library matching. The invention also discloses an on-line measurement method for the shape parameters of the wet particles. According to the invention, deficiencies of conventional light scattering granularity measuring methods are made up, high measuring precision is obtained, and on-line measurement can be realized.

The invention discloses a method for calculating the position and the movement velocity of a vacuum switch contact. The method comprises the following steps of an image acquisition step of acquiring a continuous image of the movement of the vacuum switch contact and an arc; an edge analysis step of analyzing each frame in the continuous image, acquiring the upper edge position and the lower edge position, of the arc in each frame, which are respectively the position of a vacuum switch static contact and the position of a moving contact in the present frame; and a velocity calculating step of calculating the displacement of the moving contact in two adjacent arc motion frames, and calculating the ratio, of the displacement to the frame difference time, which is the movement velocity of the moving contact. Due to the fact that an image analysis technology is employed, when the method provided by the invention is compared with a present method for calculating the position and the movement velocity of a vacuum contact, the precision is greatly improved; and at the same time the employed technology is mature and reliable, and the method is suitable for large-scale popularization and usage.

The invention discloses a system for measuring a three-dimensional volume scattering function of a microparticles in water. The system comprises a parabolic spherical reflector, a sample pool, a telescope group, a photoelectric detector and a computing processing unit, wherein the sample pool is arranged in a reflector cavity of the parabolic spherical reflector, the center position of the sample pool is located in a parabolic spherical focal point of the reflector cavity of the parabolic spherical reflector, incident light is converged at the reflector cavity focal point position, incident to a parabolic spherical surface after being subjected to particle scattering in the sample pool, transformed into parallel scattered light, received by the photoelectric detector after passing through the telescope group, and transmitted to the computing processing unit for processing, and thus, the three-dimensional volume scattering function of the microparticle can be obtained. The invention further discloses a method for measurement by utilizing the system. According to the invention, the problem of detection deviation generated when a plurality of detectors are used for detecting the volume scattering functions of different angles is avoided, the acquired image is good in uniqueness and high in contrast ratio and can be completely fixed in a work process, and the measuring stability is good and the measuring speed is high.

The invention discloses an air conditioner and a control method and device of the air conditioner. The control method comprises the steps that first detecting data of an air conditioner humidity sensor when a fan is shut down is obtained, wherein the first detecting data comprises a first temperature and a first moisture content of the located environment at the moment that the fan is shut down; the first detecting data is used for correcting a relative humidity detected by the humidity sensor actually at the current time; and the air conditioner is controlled to operate according to the corrected relative humidity. According to the air conditioner and the control method and device of the air conditioner, the control method solves the problem of detection deviation of the humidity sensor due to refrigerating or heating shutting-down and influences of waste coldness and waste heat of an evaporator, the humidity detection is enabled to be closer to an actual value of the environment, automatic dehumidification and humidification functions of the air conditioner can operate normally, and the usage experience of users is effectively improved.

The invention provides a powder material heat insulation effect evaluation device and an application method thereof and relates to material testing conducted through heat conduction testing. A test main body of the device comprises a thermotank and a test box, temperature controllers are installed on the thermotank, the test box is divided into an upper part and a lower part, a sample tank is installed in the middle of the test box, a powder material to be tested can be directly placed into the sample tank for measurement, a stable test environment is provided, detection deviation caused by the environment temperature, pressure, airflow, coating formulas and other external factors is avoided, and the test result can have stability and repeatability. The invention further provides a corresponding evaluation method, in other words, heat insulation effect evaluation of the corresponding powder material is obtained according to the measured temperature through the evaluation method. By means of the powder material heat insulation effect evaluation device and the application method thereof, the defects that in the prior art, powder material heat insulation effect evaluation devices are unstable in constant temperature environment setting, inconvenient to carry and long in test cycle, and requirements are difficult to meet are overcome.

The invention provides an air conditioner refrigerant leakage detection method and an air conditioner. A refrigerant loop is involved in the air conditioner refrigerant leakage detection method, a detectable additive is added in the refrigerant loop, a detection device is arranged outside the refrigerant loop, the detection device is used for detecting the concentration of the part, outside the refrigerant loop, of the additive in the refrigerant loop and feeding the concentration back to a controller, and the controller runs the corresponding control program according to a detection result and the pre-storage relationship. According to the air conditioner refrigerant leakage detection method, the situation that when a refrigerant is leaked, a compressor with leakage situation is directlystarted during starting of the air conditioner, and then further damage is caused to the air conditioner is avoided, then the detection deviation caused by other external factors is avoided, a multi-stage different-state same-element difference value comparison method is adopted, meanwhile, the detection factors are corrected, so that misjudgment is reduced, the accuracy of refrigerant leakage detection is improved, and the comfort of the user experience is improved.

The invention discloses a simplified algorithm of synchronous frequency conversion soft starting motor rotor position detection. According to the simplified algorithm, motor stator three-phase voltage waveforms at different rotation speeds are collected through a voltage hall circuit and an analog sampling circuit and are compared synchronously, and the position of a motor rotator is judged. An appropriate contravariant pulse is given according to the judged real-time rotor position to enable a corresponding thyristor to be opened, and a motor rotates in the process of starting. By means of the simplified algorithm, a rotator position detecting device does not need to be connected to the outer side of the motor, the processes of field installation and debugging of equipment are greatly simplified, the occurrence that different rotor position detecting devices need to be additionally arranged for different devices is avoided, and therefore complex external connection and maintaining cost can be reduced. The simplified algorithm is simple, practical and easy to achieve, not affected by different parameters such as motor manufacturers, types and power and suitable for synchronous frequency conversion soft starting devices of different motors.

The invention discloses a concrete structure intelligent curing control device. The concrete structure intelligent curing control device comprises a curing control device, a test block concrete strength detection device, an intelligent curing device and an environment monitoring device, wherein the test block concrete strength detection device, the intelligent curing device and the environment monitoring device are electrically connected with the curing control device; the intelligent curing device comprises a water tank with the heating function, a hot steam output pipe, a normal-temperaturecold water output pipe and a test block curing water pipe, and the hot steam output pipe, the normal-temperature cold water output pipe and the test block curing water pipe communicate with the watertank; the test block concrete strength detection device is used for monitoring the strength of concrete test blocks and feeding back the strength to the curing control device, so that the curing control device controls curing parameters; the test block curing water pipe is used for conducting spraying curing on the concrete test blocks under the same conditions as concrete to be cured; the environment monitoring device comprises a temperature detection device and a humidity detection device. Through the concrete structure intelligent curing control device and the concrete curing method thereof, provided by the invention, the concrete curing quality is ensured.

The invention discloses a bone age testing method based on a machine learning model, a device, computer equipment and a storage medium, wherein the method, the device, the computer equipment and the storage medium belong to the field of machine learning technology. The bone age testing method based on the machine learning model comprises the steps of receiving a to-be-tested X-ray film which comprises a bone image; identifying the attributes of multiple predetermined parts of the bone from the bone image of the X-ray film for forming a first attribute set; inputting the first attribute set into the first machine learning model for outputting a first bone age; matching the bone image in the X-ray film with the standard image of the human bone with each bone age, and finding out the bone ageof the human bone which matches the bone image in the X-ray film as a second bone age; performing scoring on the attribute of each predetermined part in the first attribute set, obtaining a total score according to the score of the attribute of each predetermined part, and outputting a third bone age according to the total score; and outputting the weighted summation of the first bone age, the second bone age and the third bone age as the tested bone age. The bone age testing method prevents a testing deviation caused by a single bone age algorithm.

The invention discloses a system for measuring a three-dimensional volume scattering function of a microparticles in water. The system comprises a parabolic spherical reflector, a sample pool, a telescope group, a photoelectric detector and a computing processing unit, wherein the sample pool is arranged in a reflector cavity of the parabolic spherical reflector, the center position of the sample pool is located in a parabolic spherical focal point of the reflector cavity of the parabolic spherical reflector, incident light is converged at the reflector cavity focal point position, incident to a parabolic spherical surface after being subjected to particle scattering in the sample pool, transformed into parallel scattered light, received by the photoelectric detector after passing through the telescope group, and transmitted to the computing processing unit for processing, and thus, the three-dimensional volume scattering function of the microparticle can be obtained. The invention further discloses a method for measurement by utilizing the system. According to the invention, the problem of detection deviation generated when a plurality of detectors are used for detecting the volume scattering functions of different angles is avoided, the acquired image is good in uniqueness and high in contrast ratio and can be completely fixed in a work process, and the measuring stability is good and the measuring speed is high.

A radar level meter includes an electronic component, a housing seat, a lower cover, an upper sleeve, a support base, a wave guide head inner rod, sealing rubber, a wave guide housing, a wave guide head top cover, a housing upper cover, a transparent window, a transparent window pressing ring, a cable sealing sleeve and an O-shaped sealing ring; the wave guide head inner rod is supported by a polysulfone support base arranged on the inner wall of the wave guide head housing, and then can be supported and fixed stably; combination of the sealing rubber and the O-shaped sealing ring can effectively ensure the sealing effect of the electronic component; the upper sleeve and the lower cover are made of polyether-ether-ketone material which can enhance the high pressure resistant feature of the radar level meter at the high temperature; time domains and frequency domains can be locally analyzed through the wavelet transform technique which is suitable for a fluctuation feature of echo signal transition during feeding or discharging of a storage tank to be measured, and then interference can be eliminated, a target reflection wave can be displayed in a maximum resolution ratio.

The invention discloses a free fatty acid detection kit and a preparation method thereof. The kit comprises reagents A and B, wherein the reagent A is prepared from the following components: sodium dihydrogen phosphate, a coenzyme A, triphosadenine, acyl coenzyme A synthetase, MgCl2, Trinder substrate and a proper amount of magnetized water, and the pH value is regulated to 7.2. The reagent B is prepared from the following components: sodium dihydrogen phosphate, 4-aminoantipyrine, acyl coenzyme A oxidase, peroxidase, flavin adenine dinucleotide, EDTA-2Na, N-sodium cocoanutylglutamate, sodiumlauryl ether sulphate, sodium N-acyl-L-serine, mannitol, sodium citrate and a proper amount of magnetized water, and the pH value is regulated to 7.2. The kit has the advantages of high and stable enzymatic activity and long preservation life; after the kit is preserved for about 15 days at 35-37 DEG C, the deviation of the detection result is only 1.99%; and the sensitivity is improved by 3.45%.

The invention relates to a power system simple harmonic detection method and system, and the method comprises the steps: carrying out the short-time Fourier transform of a power signal, and obtaininga spectrogram; constructing a distribution operator by detecting a local maximum value in the frequency direction of the spectrogram, and constructing a local maximum synchronous compression transformation model; denoising the power signal based on a synchronous extraction operator in combination with a ridge detection method; separating the denoised power signal based on the local maximum synchronous compression transformation model to obtain a plurality of non-noise signals; and calculating the instantaneous frequency and the instantaneous amplitude of each non-noise signal based on Hilbert,and identifying a harmonic signal according to the instantaneous frequency and the instantaneous amplitude of each non-noise signal. According to the method, good frequency band division and modal separation are carried out on multi-component signals, good anti-noise capability is achieved, detection deviation caused by noise is overcome, and real-time accurate detection is carried out on steady-state and transient-state harmonic parameters.

The invention discloses a point circle average diameter detecting mechanism of an internal-tooth-shaped workpiece. The mechanism comprises four sets of identical detecting assemblies that are arrangedaround one same central line, wherein an included angle between every two adjacent sets of detecting assemblies is 90 degrees. Each set of detecting assemblies includes a guiding block with a guidingslot extending in a radial direction of the circumference, a sliding block including a main body part matching the guiding slot, a detecting arm installed at the main body part, a limiting block fixedly connected to the guiding lock, a cylinder for driving the sliding block to slide along the guiding slot, and a displacement sensor. When the sliding block slides to a limit position outwardly, thedetecting arm is abutted against and contact with the limit block. The displacement sensor includes a spring arranged in a shell and a detecting shaft extending from the shell; one end of the detecting shaft is abutted against the spring and the other end is abutted against the outer side of the sliding block to detect radial displacement of the sliding block. With the detecting mechanism, the point circle average diameter of the internal-tooth-shaped workpiece can be detected accurately.

The invention discloses time-resolved optical biological detection equipment based on broadband stimulated radiation and a detection imaging method thereof. A pumping detection technology is combinedwith an optical coherence microscopy technology to realize stimulated radiation life imaging of a detected sample. The equipment comprises a super-continuum spectrum light source, a light modulation unit and an optical coherence microscopy unit, wherein the light modulation unit modulates input laser to generate pump light and probe light with time delay, the optical coherence microscopy unit is used for carrying out coherence detection on a biological sample, and the system analyzes a relation curve of signal intensity and time delay by using a phase vector method to obtain life-related information. The equipment can reflect a finer structure of an atomic energy level, has the advantages of long working distance, high temporal-spatial resolution, rapid imaging and the like, and has both tissue structure information and molecular specificity information. In addition, detection of non-fluorescence chromophores can be achieved, and detection deviation possibly caused by fluorescence labeling under specific conditions is avoided.

The invention provides a multiple-step shaft end face run-out detecting gauge. The multiple-step shaft end face run-out detecting gauge can simple, conveniently and quickly detect multiple-step shaft end face run-out, is high in detecting efficiency, further avoids detection deviation, and ensures the detecting and processing quality of the multiple-step shaft end face. The multiple-step shaft end face run-out detecting gauge comprises a detecting module and is characterized in that a detecting cavity corresponding to a multiple-step shaft is arranged in the detecting module, and a plurality of detecting head respectively corresponding to the step end faces are arranged on the detecting module corresponding to the detecting cavity.

The invention discloses a fixed connecting sleeve for measuring pipes of a pile foundation, and relates to the technical field of municipal infrastructure construction. The fixed connecting sleeve forthe measuring pipes of the pile foundation comprises sleeve pipes. The number of the sleeve pipe sis at least three, and every two adjacent sleeve pipes are connected through a sleeve pipe connectingrod. Fixed rods are fixedly connected to each sleeve pipe connecting rod. Each sleeve pipe comprises a pipe body and a sound measuring pipe. Sawteeth arranged in a cooperation manner are arranged onthe pipe bodies and the sound measuring pipes. According to the fixed connecting sleeve for the measuring pipes of the pile foundation, through sleeve pipe improvement and cooperative use of the sleeve pipe connecting rods and the fixed rods, the relative positions of the sound measuring pipes are guaranteed well, the situation that the sound measuring pipes are blocked due to infirm connecting ofthe multiple segments of sound measuring pipes is avoided, meanwhile, the situation that deviation happens to detection due to shifting of the sound measuring pipes is avoided, engineering quality isimproved, and meanwhile the repair frequency is reduced.

The invention discloses a safety detection and alarm device and method for children left in an automobile. The safety detection and alarm device comprises a processor, a human body infrared sensor, a temperature sensor, a sound sensor, an alarm and a wireless transmission module. The processor, the human body infrared sensor, the temperature sensor, the sound sensor and the wireless transmission module are arranged in the automobile, the human body infrared sensor, the temperature sensor and the sound sensor are all connected with the processor, the processor is connected with an ignition switch and a vehicle door closing detection unit, and the output end of the processor is connected with the input end of the wireless transmission module; the alarm is arranged outside the automobile, the input end of the alarm is connected with the output end of the processor, children and temperature in the vehicle are detected in multiple directions, the detection accuracy is improved, and an alarm can be generated in time to remind an automobile owner.

The invention provides a chip pin coplanarity detection device which comprises a rack, a workbench, a detection mechanism, a tray, a tray positioning mechanism and a chip carrying mechanism, and is characterized in that the tray is used for placing a chip and is arranged on the workbench; the tray positioning mechanism is arranged at the periphery of the tray and is used for positioning the side surface of the tray; the chip carrying mechanism is arranged above the tray and comprises an XYZ moving assembly and a taking and placing assembly, the taking and placing assembly is connected with theXYZ moving assembly, and the XYZ moving assembly is used for driving the taking and placing assembly to place the chip in the tray. By arranging the tray positioning mechanism, the positioning of thetray on the workbench can be achieved, and the detection deviation caused by the deflection of the tray can be avoided. By arranging the chip carrying mechanism, the chip can be automatically carriedto the tray, so that the automation degree is high, and the chip is prevented from being damaged in the carrying process.

The invention discloses a method for calculating the position and the movement velocity of a vacuum switch contact. The method comprises the following steps of an image acquisition step of acquiring a continuous image of the movement of the vacuum switch contact and an arc; an edge analysis step of analyzing each frame in the continuous image, acquiring the upper edge position and the lower edge position, of the arc in each frame, which are respectively the position of a vacuum switch static contact and the position of a moving contact in the present frame; and a velocity calculating step of calculating the displacement of the moving contact in two adjacent arc motion frames, and calculating the ratio, of the displacement to the frame difference time, which is the movement velocity of the moving contact. Due to the fact that an image analysis technology is employed, when the method provided by the invention is compared with a present method for calculating the position and the movement velocity of a vacuum contact, the precision is greatly improved; and at the same time the employed technology is mature and reliable, and the method is suitable for large-scale popularization and usage.

The invention provides a comprehensive detection device for an electric appliance control box, which structurally comprises a chassis, a stand column, a connecting seat, a detection mechanism and a clamping seat. The lower end of the stand column is embedded and clamped to the outer wall of the upper end of the chassis; the outer wall of the left side of the connecting seat is clamped and connected to the outer wall of the upper end of the right side of the stand column; the outer wall of the left side of the detection mechanism is fixed to the surface of the right side of the connecting seat through screws; and the outer wall of the lower end of the clamping seat is embedded and fixed to the outer wall of the upper end of the chassis. When the device is used, after the electric appliance control box is placed on the clamping seat and fixed, the clamping seat can be moved to move the electric appliance control box to the lower end of the detection mechanism. After the detection mechanism makes contact with the electric appliance control box and is aligned with the electric appliance control box, the detection mechanism can be moved downwards, a probe is enabled to be in contact with an electrifying point of the electric appliance control box, and an upward force is applied to push the probe to move upwards so as to be in contact with a mobile electrification device to realize electrification, and the condition of detection deviation caused by incapability of ensuring that the current completely enters the electric appliance control box due to electrification when alignment is not achieved is avoided.

The invention discloses an immunoturbidimetry detection reagent and a preparation method thereof. The reagent comprises latex microspheres, a buffer solution, [epsilon]-polylysine, an activating agentand a preservative, wherein the activating agent is prepared from N-hydroxyl succinimide and 1-(3-dimethylaminopropyl)-3-ethyl carbodiimide hydrochloride, and the pH value of the activating agent is7 to 9. The concentration of the activating agent is 50-300mg / ml, the pH value of the buffer solution is 6.0-8.0, the molar mass of the buffer solution is 20-100mM, and the mass percent of the preservative is 0.05-0.2%. According to theimmunoturbidimetry detection reagent,by optimizing the components and proportion of the reagent and treating the latex microspheres before coupling, the sensitivityof the latex microspheres is improved, and the absorbance of some detection items at a low value is improved, so that the detection deviation caused by the fact that the real condition of a sample cannot be accurately reflected when the low value is tested is avoided, and the detection accuracy is improved.

The invention provides a powder material heat insulation effect evaluation device and an application method thereof and relates to material testing conducted through heat conduction testing. A test main body of the device comprises a thermotank and a test box, temperature controllers are installed on the thermotank, the test box is divided into an upper part and a lower part, a sample tank is installed in the middle of the test box, a powder material to be tested can be directly placed into the sample tank for measurement, a stable test environment is provided, detection deviation caused by the environment temperature, pressure, airflow, coating formulas and other external factors is avoided, and the test result can have stability and repeatability. The invention further provides a corresponding evaluation method, in other words, heat insulation effect evaluation of the corresponding powder material is obtained according to the measured temperature through the evaluation method. By means of the powder material heat insulation effect evaluation device and the application method thereof, the defects that in the prior art, powder material heat insulation effect evaluation devices are unstable in constant temperature environment setting, inconvenient to carry and long in test cycle, and requirements are difficult to meet are overcome.

The invention provides a zero-position adaptive device and method for an electrochemical sensor. The device comprises an air-inlet module, a check valve, an air pump, an electrochemical sensor module,a power supply module, a core processing module and a discharging module, the air-inlet module is separately connected with the air pump and the electrochemical sensor module, the check valve is arranged between the air-inlet module and the air pump, the air pump is separately connected with the electrochemical sensor module, the core processing module and the power supply module, the electrochemical sensor module is separately connected with the core processing module, the power supply module and the discharging module, and the power supply module is also connected with the core processing module. According to the zero-position adaptive device and method for the electrochemical sensor, once zero-position drift occurs in a usage process of the sensor, adaptive calibration can be rapidly realized, and zero-position deviation is avoided.