47results about How to "Avoid direct measurement" patented technology

The invention discloses a gesture recognition system based on ultrasonic waves.The gesture recognition system comprises an electronic device capable of transmitting acoustic waves and recording acoustic wave signals at the same time, and the electronic device comprises an acoustic wave transmitter, an acoustic wave receiver and a measurement and recognition module.The electronic device controls the acoustic wave transmitter to transmit the acoustic waves, and the transmitted acoustic waves irradiate a target to generate reflected waves; the acoustic wave receiver receives the acoustic wave signals to send the acoustic wave signals to the measurement and recognition module, the acoustic waves are measured, and the gesture parameters are obtained to recognize gestures; the electronic device controls the acoustic wave receiver to receive the acoustic waves, the acoustic wave signals reflected by the target are obtained, the acoustic wave signals received by the acoustic wave receiver are mixed signals, the mixed signals comprise direct signals from acoustic sources, signals reflected by nearby objects and signals reflected by the target at the same time.The invention further discloses a gesture recognition method based on the ultrasonic waves.

The invention discloses an integrated probe type photoelectric water-quality multi-parameter online measuring system. The integrated probe type photoelectric water-quality multi-parameter online measuring system comprises a control and data acquiring unit and an optical system unit, wherein the control and data acquiring unit comprises an upper computer, a control and data acquiring unit and an acquiring device, the optical system unit comprises a composite light source and a light path, the composite light source comprises a left light source and a right light source, the left light source is an LED array composed of many LED light sources different in wavelength, and the right light source is composed of ultraviolet LED light sources and near-infrared LD (laser diode) light sources. The upper computer controls the light source to emit different wavelengths of light to irradiate water body to be detected by the control and data acquiring unit and triggers substances of the water body to be detected to emit fluorescent and scattered light signals. The integrated probe type photoelectric water-quality multi-parameter online measuring system has the advantages that direct detection can be realized without any chemical reagent, data detection is fast and complicated steps are avoided. Meanwhile, detection of types and concentration of various algae in the water and online detection of hydrocarbon content and turbidity can be completed; detection can be independent and accurate, and different needs of environment monitoring are met.

The invention discloses a trace ammonia concentration measuring device and application thereof. In the trace ammonia concentration measuring device, a sampling probe is used for extracting a tiny part of flue gas with ammonia content to be measured from a flue by a constant-speed wet type sampling method and under the action of an air extracting pump; one part of the extracted flue gas to be measured directly enters an O2 analyzer and an NOX analyzer to measure O2 concentration and NOX concentration, and the other part of the extracted flue gas to be measured passes through an electric heater and a pretreatment module of a catalyst and then enters the NOX analyzer to measure the NOX concentration after all the trace ammonia in the flue gas to be measured reacts with the NOX to be converted into N2; and according to the input O2 concentration signal and NOX concentration signals before and after pretreatment, a data acquisition and analysis system converts and outputs a concentration signal of NH3 in the flue gas. The ammonia concentration is obtained by measuring the NOX concentration change before and after the reaction of the flue gas and all the trace escape NH3 and the number of measuring samples is increased, so measuring precision is improved, and the content of total ammonia, including ammonia salt can be measured.

The invention relates to a method for the nondestructive measurement of the refractive index of a transparent capillary wall and a device thereof, belonging to a method for measuring the refractive index of solid by taking visible light as a light source. By utilizing the principle that parallel light has different convergence focus positions after passing through capillaries filled with liquid with different standards, the invention can be used for judging the image formed after the image formation of the convergence focus position by a CCD, calculating the outline position and focal distance of the capillary and further figuring out the refractive index of the capillary wall. The invention has the accuracy in the measurement of the refractive index of the capillary of being superior to 0.005, and has the characteristics of simple equipment, convenient operation and image observation, clear identification and high automation degree; furthermore, the invention realizes the accurate measurement for the refractive index of the capillary wall under the nondestructive condition, thus meeting the requirement for the accuracy of the refractive index of the capillary wall in the common experiment process.

The invention relates to an internal combustion engine exhaust on-line measurement and diagnosis method and equipment. The internal combustion engine exhaust on-line measurement and diagnosis equipment comprises a measuring device, a processing controller and a display device, wherein the measuring device comprises an air fuel ratio sensor and an oxynitride sensor, the air fuel ratio sensor measures the air fuel ratio of a combustible gas mixture of an internal combustion engine, and the oxynitride sensor measures the concentration of the oxynitride in the exhaust of the internal combustion engine; the processing controller is in signal connection with the measuring device and can be used for storing an internal combustion engine discharge table or an internal combustion engine discharge mathematical model, and the processing controller receives the data of air fuel ratio of combustible gas mixture and concentration of the oxynitride in the internal combustion engine exhaust and judges the discharge state of the internal combustion engine according to the stored internal combustion engine discharge table or internal combustion engine discharge mathematical model; and the display device is in signal connection with the processing controller and displays the discharge state of the internal combustion engine. The method comprises a measurement step, a processing control step and a display step. The method and equipment provided by the invention can be used for rapidly measuring the concentration of a specific component in the internal combustion engine exhaust and judging whether the internal combustion engine exhaust meets the standards or not.

The present invention belongs to the field of fluid and environmental protection equipment, and proposes a method for obtaining an aeration performance relationship between a scale aerator prototype and an original aerator according to the dimensional analysis. The method comprises: obtaining the specific size of an aeration area pool of the actual aerator through measurement; scaling the aeration pool and the aerator according to the proportion; producing the aeration pool and the aerator prototype; carrying out experiments to measure aeration performance of the aerator prototype at different rotational speeds; drawing curves of the number of absorption with the number of Froude (Y-Fr) and of the number of dynamic efficiency with the number of Froude (SAE*-Fr); according to the actual running condition of the original aerator, calculating the number of Froude of the original aerator in actual running; and finally, by comparison with the Y-Fr curve and the SAE*-Fr curve of the prototype, carrying out conversion to obtain the aeration performance indicators, namely the standard oxygenation capacity SOTR and the standard power efficiency SAE of the original machine. By virtue of the method provided by the present invention, not only aeration performance parameters of the aerator in actual running can be quickly and accurately measured, but also aeration performance of the aerator when the rotational speed changes can be predicted.

The invention provides a body height measurement method and a body height measurement system and a portable device. The body height measurement method comprises the following steps: calculating the double-step length of a tested person; determining the body height level of the tested person according to the double-step length, wherein the body height level comprises the tall height, the medium height and the short height; analyzing to determine the footprint length of the tested person, wherein the footprint length is the length of the footprint of the tested person; and calculating the body height of the tested person according to the body height level, the double-step length and the footprint length. With the adoption of the body height measurement method, the direct measurement for the height of the tested person is avoided, meanwhile, the height of the tested person can be flexibly measured anytime and anywhere, therefore, the body height of the tested person can be obtained flexibly and conveniently, and meanwhile, the accurate body height measurement result can be obtained.

The present invention discloses a glue mixing machine, which comprises a mixing head device, an air pressure supply unit, a first raw material sealing container provided with a soft bag inside, a second raw material sealing container provided with a soft bag inside, a first liquid sealing container, a second liquid sealing container, a first flow meter, a second flow meter, a first electromagnetic valve, a second electromagnetic valve, and a control unit. According to the present invention, the air pressure supply unit pushes the liquid to extrude the raw material, and the amount of the liquid is metered through the flow meter so as to calculate the liquid flow volume, such that the direct measurement of the flow of the high viscosity raw material is avoided, and the expensive high viscosity flow meter is not required so as to reduce the equipment cost; and the large-scale screw pump is not required, such that the equipment has the advantages of small size, light weight and convenient use under the premise of maintaining of the high precision and the high uniformity.

The invention relates to the field of environmental monitoring, and discloses a soft measurement prediction method of water quality of total nitrogen. The method comprises the following steps that: data values of a plurality of water quality monitoring indicators in to-be-tested water environment are obtained, each water quality monitoring indicator has a plurality of obtained data values, at least one of the plurality of water quality monitoring indicators is TN, a number of water quality monitoring indicators are selected from the water monitoring indicators out of the TN, data values of theselected water quality monitoring indicators form a data sample set, the data sample set is divided into a training set and a test set, a fuzzy neural network algorithm is used for training the training set, a TN soft measurement model is obtained; the test set is used for testing the TN soft measurement model to obtain a test result; the model execution and the model test are repeated until theobtained test result meets a preset condition, and the TN soft measurement model meeting the preset condition is set as a final soft measurement model. The obtained model has accurate predicting effects, and reduces water quality soft measurement prediction cost of the TN.

Provided is a resistivity measurement method of a rock and ore specimen. One end of a resistance box is connected with one end of the rock and ore specimen, and a given voltage is applied between the other end of the resistance box and the other end of the rock and ore specimen. First, the resistance of the resistance box is adjusted to be a large value, the resistance box is ensured to be passed through a safe supply current even the resistivity of the rock and ore specimen is low under the given supply voltage, if the current passing through the resistance box is large, the resistance R1 of the resistance box is increased, then U1 and U2 are measured again, and R2 and the resistivity are calculated. According to the invention, direct measurement of the current is prevented, and high-precision measurement of the current is realized through measuring the voltage of a high-precision resistor loaded on the resistance box, hence the problem that the current is too large or too small to measure caused by the measurement current directly though an ammeter is prevented.

The invention relates to a method for determining a transmission ratio (rcvr) to be set of a continuously variable transmission unit in order to emulate an alternative transmission assembly, and to a corresponding drive system. Firstly, an actual input characteristic variable and an actual output characteristic variable of the continuously variable transmission unit are determined. On the basis of the actual input characteristic variable and the actual output characteristic variable, a theoretical output torque (Mab,th) of the alternative transmission assembly is determined. By taking the theoretical output torque (Mab,th) of the alternative transmission assembly into consideration, the transmission ratio (rcvr) to be set of the continuously variable transmission unit is determined, wherein said transmission ratio (rcvr) is determined in such a way that the driven torque (Mab,ist) produced by the continuously variable transmission unit corresponds to the theoretical output torque (Mab,th). For this purpose, in addition to the continuously variable transmission unit, the drive system has a control unit (16) having a first input and a second input for reading the characteristic variables. Connected to the inputs is a calculation section (30) which, on the basis of the characteristic variables, determines the theoretical output torque (Mab,th) of the alternative transmission assembly. The control unit (16) also has a control section (31), which determines the transmission ratio (rcvr) to be set in such a way that it corresponds to the theoretical output torque (Mab,th).

The invention relates to a device for machining F-shaped steel used in a track skeleton for a magnetic levitation train. The F-shaped steel comprises a wing plate, an inner pole plate and an outer pole plate, wherein the outer side of the outer pole plate is an outer point angle. The device is characterized by comprising a center mould block, a horizontal bracket and a vertical bracket, wherein the horizontal bracket and the vertical bracket are fixedly connected and perpendicular to each other; the horizontal bracket is fixed with the center mould block; a stop collar with a bolt hole is formed on the center mould block; a side plate is arranged on the center mould block; a fastening rod used for fastening is arranged on the side plate; and the distance between the side plate and the vertical bracket is greater than or equal to the width of the F-shaped steel. According to the invention, the device for machining the F-shaped steel can be used for machining a bolt hole group with the dimensions and the locations meeting the requirement rapidly and effectively; the direct measurement and location during machining are avoided; and the resource waste, the high cost and the maximum error in machining caused by adopting large devices are avoided. The machining device has the advantages of simple structure, convenience in operation, and high efficiency.

The invention discloses a multifunctional gastric lavage bed. The multifunctional gastric lavage bed comprises a bed body, vomiting grooves, head fixators, shoulder fixators and limb and body fixators, wherein the bed body comprises a bed plate; the bed plate is sequentially provided with the head fixators and the shoulder fixators from top to bottom; two side edges of the bed plate are respectively provided with the limb and body fixators; the vomiting grooves are formed in the outer sides of the shoulder fixators. According to the multi-functional gastric lavage bed disclosed by the invention, the structure is reasonable, the operation is convenient, the working efficiency is increased, and the labor is saved.

The invention relates to a field of environment monitoring and discloses a total phosphorus water quality soft measurement and predication method. The method includes acquiring data values of multiplewater quality monitoring indexes of a to-be-measured water environment, wherein the number of the acquired data values of each water quality monitoring index is plural and at least one among the water quality monitoring indexes is TP; selecting a plurality of water quality monitoring indexes from the water quality monitoring indexes except TP and forming the data values of the selected water quality monitoring indexes into a data sample set, dividing the data sample set into a training set and a testing set, training the training set by utilizing a fuzzy neural network algorithm and acquiringa TP soft measurement model; utilizing the testing set to test the TP soft measurement model and acquiring a testing result; repeating model establishment and model testing until an acquired testingresult meets preset conditions, and taking the TP soft measurement model meeting the preset conditions as the final soft measurement model. The obtained model is accurate in predication results and reduces the TP water quality soft measurement and predication cost.

A modified site analysis technology for multi-site modification disclosed by the invention realizes the localization of PEGylated protein modification sites for four or more modification sites, and avoids direct measurement of PEG-modified peptides impossible to measure molecular weight, while the peptides not containing modified sites are performed with accurate measurement of molecular weight after the specificity of the PEG-modified peptides is recovered and enzyme-cut again, and accurate PEG-modified sites are obtained by comparison with theoretical peptides. The method realizes the determination of more modified sites of protein of the modified sites with high average modification degree, has specificity to the PEG-modified peptides, simplifies the detection steps, reduces the workload, and is convenient to operate, easy to implement and high in repetition rate.

A vacuum cleaner comprises a suction unit (23) which is drivable by means of a first electric motor (25). A suction attachment (7) of the vacuum cleaner comprises a rotatable brush (41) which is drivable by means of a second electric motor. The vacuum cleaner comprises a control unit (29) by means of which an electric current through the first motor (25) can be controlled. In accordance with the invention the control unit (29) controls the current through the first motor (25) as a function of a mode of operation of the brush (41), which mode can be selected by a user of the vacuum cleaner. In this way, the suction power of the suction unit (23) is adapted to the mode of operation of the brush (41), thereby improving a relationship between cleaning performance, ease of use, current consumption and noise production of the vacuum cleaner. In a special embodiment of a vacuum cleaner in accordance with the invention, the control unit (29) controls an air pressure and an air flow in the suction attachment (7) in such a manner that the air pressure does not decrease below a first limit value (HMIN), the air flow does not exceed a second limit value (QMAX), and at least one of the limit values (HMIN, QMAX) is substantially reached.

The invention discloses a piezoelectric impedance information based damage identification method of a laminated rubber vibration-isolated bearer, and belongs to the field of structure detection of civil engineering. The method comprises that (1) an origin antiresonance frequency characteristic equation of a single damage and damage-free single-coupling period structure is established; (2) the laminated rubber vibration-isolated bearer is simplified into a finite single-coupling period structure, and the dimensionless original antiresonance frequency in the damage-free condition is calculated;(3) the sensitivity of the dimensionless original antiresonance frequency to shearing rigidity change of a basic period unit is calculated, and a sensitivity identification equation set is established; and (4) admittance signals before and after damage are collected, the structure origin antiresonance frequency is extracted, and the sensitivity identification equation set is solved based on the change rate of the origin antiresonance frequency before and after damage, and the damage is identified. It is only required to measure change of the origin antiresonance frequency of a few measurementpoints before and after structural damage rather than accurate model parameters of the original structure to identify multiple damages of a period structure accurately.