97results about How to "Easy to measure accurately" patented technology

The invention discloses a landslide MIMO radar monitoring system and monitoring method. Emitting and receiving antennas of the system are an MIMO radar antenna array. Emitting and receiving time-sharing selectors are connected with emitting and receiving antenna array elements respectively. A system synchronization control unit is connected to the emitting and receiving time-sharing selectors through an antenna time-sharing control unit. The monitoring method is characterized by carrying out MIMO antenna array time-sharing emission and step frequency continuous wave signal reception; carrying out inverse Fourier transform and distance compression on echo data, carrying out phase discontinuous correction on radar echo data, calculating time delay compensation factor and carrying out beam forming method azimuth focusing to obtain a high-resolution complex image; carrying out continuous monitoring to obtain a plurality of complex images and forming complex image pairs; and calculating differential interference phase after complex image pair registering and extracting deformation value and carrying out early warning. According to the landslide MIMO radar monitoring system and monitoring method, non-contact remote monitoring is achieved, monitoring range is wide, azimuth resolution ratio is high, real-time performance is high, data acquisition is quick, system device is light and portable, and layout is adjustable.

The invention discloses a color stereoscopic calibration object-based unmanned aerial vehicle calibration method and system. The method comprises the steps of putting a color checkerboard stereoscopic calibration object into a to-be-shot scene; shooting an image of the color checkerboard stereoscopic calibration object in at least three different directions by adopting an unmanned aerial vehicle; linearly solving intrinsic parameters of an unmanned aerial vehicle camera by adopting a vanishing point theory according to the shot image of the color checkerboard stereoscopic calibration object; and determining a geometric restriction relationship between the spatial position of the unmanned aerial vehicle camera and the image by adopting a coordinate projection transformation method according to the intrinsic parameters of the unmanned aerial vehicle camera. According to the method and the system, the color checkerboard stereoscopic calibration object is adopted for performing camera calibration, so that accurate measurement is facilitated, the detection precision is high, the placement is facilitated, and the universality is high; and the calibration of the intrinsic parameters of the camera can be finished only by shooting the image of the color checkerboard stereoscopic calibration object in the at least three different directions and obtaining the intrinsic parameters of the unmanned aerial vehicle camera in combination with the vanishing point theory, so that the use is more convenient. The method and the system can be widely applied to the field of computer vision.

The invention aims at providing a liquid path system based on unit metering and a use method thereof. The liquid path system has the functions of fetching liquid, mixing and discharging the liquid at the same time, guarantees accurate metering and is convenient to use. In order to achieve the effects, the liquid path system comprises an upper solenoid valve, a reaction container, a lower solenoid valve, a liquid level sensor, a multi-position valve, a three-way valve and a peristaltic pump. Through the structure, the liquid path system has the following benefits as follows: a volume metering mode of an extraction unit is achieved through a hard plastic guide pipe connected between a public hole of the multi-position valve and the liquid level sensor; the whole liquid path system only makes use of one liquid level sensor; and a reagent is metered and directly enter the reaction container to be subjected to processes of mixing, reacting, testing and the like.

The invention relates to a real-time measurement method for automatically measuring quality of actually shot bullets when a small arm in stillness or motion shoots at a target. The method includes: aiming for each bullet, arranging an acoustic transducer at the lower position of a muzzle to collect a bullet shockwave signal and a muzzle shockwave signal, selecting a specific time difference between the bullet shockwave signal and the muzzle shockwave signal received by the acoustic transducer, and calculating the quantity of the actually shot bullets with a mathematical model. The method is free of influences of bullet shape and structure parameters as well as optical, magnetic, electrical and acoustic interferences, high in measurement accuracy and convenient to use, and calibration coefficients are not required. The high-accuracy measurement method is provided for measuring the quantity of the actually shot bullets automatically in real time when the small arm shots at the target.

The invention discloses a low-frequency antenna array phase measuring method and device based on GPS (global positioning system) and phase detecting chips. The method includes: using a time signal in GPS as an initial signal of information source control, controlling a control circuit of each calibration signal in an antenna array to configure initial output phase information of each signal output chip, and synchronously authorizing same-time, same-phase and same-frequency output of the calibration signal of each unit antenna in the antenna array to allow multiple calibration signals to become coherent signals. The device comprises a GPS signal receiving circuit, a signal generating and control circuit and a phase difference detecting and comparison circuit. The method and the device are efficient, high in precision and independent of empirical value.

The invention discloses a natural gas hydrate generating device capable of being quickly disassembled for sampling, which comprises a reaction kettle (1), a stirring device (2) and a DBR (dihydroxy benzene resorcinol) air bellow (3), wherein the stirring unit (2) comprises a reversible motor (4) and a fixed seat (5), and the fixed seat (5) is arranged on a motor shaft (8) of the reversible motor (4); and the reaction kettle (1) is arranged on the fixed seat (5), the stirring device (2) is arranged in the DBR air bellow (3), the reaction kettle (1) comprises an upper end cover (9), a lower end cover (10), a fixed assembly group (11) and an organic glass tube (12), and an upper connecting rod (15) and a lower connecting rod (16) of the fixed assembly group (11) are connected through a hinge. The device disclosed by the invention has the beneficial effects that generation and decomposition conditions of natural gas hydrates can be simulated, the device is easy and quick to disassemble, and natural gas hydrate samples can be quickly taken out after the natural gas hydrates are generated so as to be tested and experimented.

The invention discloses a man-machine data exchange and database management newborn monitoring bed which comprises a data acquisition module, a data communication and display module, a motor driving unit, a cell management module and a processing operation unit. The data acquisition module is connected with the processing operation unit; the data acquisition module is used for transmitting acquired newborn sign data to the processing operation unit to carry out operation processing; the data communication and display module is connected with the processing operation unit; the data communication and display module is used for transmitting a user instruction and carrying out corresponding display on the sign data subjected to processing operation by the processing operation unit; the motor driving unit is connected with the processing operation unit; the motor driving unit is used for regulating the height and the pitch angle of the monitoring bed according to a instruction sent out by the processing operation unit; the cell management module is connected with the processing operation unit; the cell management module is used for carrying out cell management by the processing operation unit.

A brazing ball machining device enabling the size of brazing balls to be controllable comprises a wire feed device, a wire cutting device and a heating and cooling device, wherein the wire feed device, the wire cutting device and the heating and cooling device are sequentially arranged from top to bottom in the vertical direction. The wire feed device comprises a brazing wire scroll, a wire feed roller, a locating device and a brazing wire length control device. The wire cutting device comprises a blade and a liner plate, the liner plate is provided with a reciprocating drive mechanism, and the blade is installed on the reciprocating drive mechanism. The heating and cooling device comprises a heating and cooling pipe with a heating part and a cooling part. A method machining the brazing balls through the device comprises the steps of heating, wire feeding, wire cutting, balling, cleaning, drying, inspecting and the like. According to the invention, the brazing wire length control device measures the wire cutting length accurately and the wire cutting device cuts wires accurately to control the diameter of the brazing balls, and therefore the size of the machined brazing balls can be more uniform; the requirements of the high-density assembly technology can be met, the automation degree is higher and the machining efficiency is higher.

A mutual capacitance measurement is acquired for two thermally and electrically conductive bodies separated by an intervening dielectric material. At least one of (i) a thermal conductance and (ii) a heat transfer rate between the two thermally and electrically conductive bodies is determined based at least on the mutual capacitance measurement. For example, a thermal conductance between the two thermally and electrically conductive bodies may be determined as the mutual capacitance measurement scaled by a ratio of the thermal conductivity of the intervening dielectric material and the dielectric constant of the intervening dielectric material.

The invention discloses a cantilever beam type flexoelectric acceleration sensor and a method for measuring acceleration. The cantilever beam type flexoelectric acceleration sensor comprises a plurality of flexoelectric dielectric materials, metal electrodes, epoxy resin, an upright column, a mass block and two lead wires. The flexoelectric dielectric materials are stacked on one another, and themetal electrodes are arranged on the upper surfaces and the lower surfaces of the flexoelectric dielectric materials; every two adjacent metal electrodes are solidified by the epoxy resin; the uprightcolumn is fixed to one end of each flexoelectric dielectric material; the mass block is adhered at the other end of the corresponding flexoelectric dielectric material; the lead wires are arranged between the metal electrodes in a serially connected manner, and the other ends of the two lead wires are connected with two external metal electrodes; a packaging protection cover and a base are adhered with each other, and the flexoelectric dielectric materials, the metal electrodes, the mass block and the lead wires are sealed in the packaging protection cover and the base. The cantilever beam type flexoelectric acceleration sensor and the method have the advantages that the magnitude of the acceleration can be measured by the aid of linear relations between strain gradient of the flexoelectric dielectric materials under the effect of inertia force of the mass block along the thickness directions and electric charge generated on the basis of flexoelectric effects, and accordingly vibration can be measured.

The invention discloses a method for simultaneously measuring contents of three fat-soluble vitamins in multiple vitamin injections, and relates to the field of analytic chemistry. The method in the invention comprises the steps of: taking octadecylsilane chemically bonded silica as the stationary phase, and filling in the chromatographic column of a liquid chromatograph; preparing methanol-acetonitrile-ethyl acetate as the mobile phase; precisely weighing proper vitamin A, vitamin D3 and vitamin E contrasts, and diluting by adding isopropyl alcohol to obtain contrast solution; precisely weighing multiple vitamin injections to be measured, and diluting by using isopropyl alcohol to prepare test solution; respectively taking contrast solution and test solution, injecting into the liquid chromatograph to perform isocratic elution, and recording the chromatogram; and calculating the concentration of the test solution in terms of peak area according to the external standard method. By means of the method in the invention, the problems that gradient elution and the mobile phase are complex and sample processing is fussy and time-saving due to the fact that three different detection wavelengths are adopted in the prior art are solved.

The invention discloses a sitting posture correcting alarm device for primary school students. The sitting posture correcting alarm device for the primary school students comprises a base, wherein a lifting mechanism is arranged at the top of the base; a table plate is fixed to the end of the lifting mechanism; a distance sensor for measuring the distance between a desktop and a face and a distance sensor for measuring the height of the table plate are separately arranged on the table plate; the base is movably connected with an armchair through a sliding mechanism; and the sliding mechanism is fixed through a locking mechanism; and a singlechip microcomputer, an alarm device and a power supply are separately arranged on the armchair. The sitting posture correcting alarm device for the primary school students has the following advantages that the singlechip microcomputer controls the work of an electric push rod, and the telescopic end of the electric push rod drives the table plate tomove up and down through a connecting block, so that the height of the table plate is adjusted, the sitting posture correcting alarm device for the primary school students are suitable for students with different heights, and the adaptability of the sitting posture correcting alarm device for the primary school students is greatly improved.

The invention provides a device and method for representing fluorescent powder conversion type LED light effect. The device comprises a drive power supply, an integrating sphere, a spectrograph, an LED light source, a lamp holder and a thermostat. The LED light source is set on the lamp holder. The drive power supply supplies power to the LED light source. The lamp holder is set on the thermostat.The thermostat changes environment temperature of the LED light source through adjustment of temperature of the lamp holder. A probe of the spectrograph penetrates the integrating sphere and reachesan inner wall. The LED light source penetrates the integrating sphere and reaches the interior of the integrating sphere. According to the device and the method, operation is simple; accurate measurement is easy to carry out; measurement error robustness is high; result repeatability is high; LED pins are not contacted; LED product light effect is measured according to relative spectrum; the method belongs to a noncontact measurement method; accuracy and sensitivity are high; an instrument requirement is low; measurement error immunity is high; and the device and the method can be used for measuring single LED light effect, also can be used for measuring average light effect of an array composed of a plurality of LEDs and are wide in application range.

The present invention provides a large-leaf thick laver crisp chip and a related production method, the large-leaf thick laver crisp chip is prepared from a large-leaf thick laver sheet dry product, edible auxiliary materials and edible seasonings, the weight (gram) of large-leaf thick laver sheet dry product per unit area is 13.5mg / cm<2> to 20mg / cm<2>, the longest length of the leaf body is 2cm-5cm, the edible auxiliary materials are selected from sesame seeds, peanuts, pine nuts and walnuts, the edible seasonings include one or more of edible vegetable oil, sugar, malt dextrin, starch, edible salt, soy sauce and spices, the large-leaf thick laver crisp chip is prepared from the large-leaf thick laver sheet dry product by double-side baking, single and double-side flavoring, single and double-side material feeding and double-side baking, the baking temperature is 150 DEG C-180 DEG C, and the baking time is 25 seconds to 35 seconds. The large-leaf thick laver crisp chip is convenient to eat, nutritious, delicious, easy to bake, even to cook, good in baking effect, easy in attachment of accessories, accurate and easy to meter, and suitable for large-scale application.

The invention discloses a cross-shaped full flow feeler inspection probe used for a marine ultra-soft soil in-situ test. The cross-shaped full flow feeler inspection probe comprises a testing system and a probing end. The probing end is in a cross shape and is vertically fixed to the lower portion of the testing system. The upper portion of the testing system is connected with a feeler lever. Thetesting system comprises sensors, a signal transmission line and a sleeve arranged on the feeler lever in a sleeving mode. The sleeve comprises a friction sleeve body and an end friction sleeve body.The friction sleeve body is arranged on the end friction sleeve body. The sensors comprise a friction pressure sensor arranged on the friction sleeve, an end friction pressure sensor arranged on the end friction sleeve body, and a pore water pressure sensor arranged on the end friction sleeve body. The friction pressure sensor is used for sensing the friction force. The side, close to the probingend, of the end friction sleeve is provided with a pore pressure filter ring. The cross-shaped full flow feeler inspection probe can conduct low feeler inspection on seafloor/underwater ultra-soft soil layers, accurately measure relevant physical and mechanical property parameters of the ultra-soft soil layers, and reliable reference is provided for marine engineering exploration and foundation construction.

The invention relates to a production line of inorganic light weight thermal insulation composite mortar drier and a production process thereof; the production line consists of a preparation unit of slurry, a preparation unit of aggregate, a preparation unit of cementing material and a preparation unit of finished products; and then proportioning, stirring and mixing are conducted in sequence; and finally the inorganic light weight thermal insulation composite mortar drier is prepared. The production line and the process are applicable to the industrialized batch production of building mortar drier, can greatly improve the production efficiency and reduce the labor intensity, and is also convenient for the accurate gauging of the raw materials and the automatized control of the production process, and simultaneously, can reliably guarantee the product quality, improve the operating environment and reduce the waste of various raw materials.

The invention provides a production method of granular fully-degradable environment-friendly starch and modified starch master batch. The method comprises the following steps: mixing a plasticizer andstarch/modified starch in a mass ratio of 1:(1-9), and carrying out extrusion granulation to obtain master batch A; and mixing the obtained master batch A with PBAT and an auxiliary agent, carrying out extrusion granulation, and performing packaging to obtain the master batch B. The invention also provides granular full-degradable environment-friendly starch and modified starch master batch. Thegranular full-degradable environment-friendly starch and modified starch master batch comprises the master batch B prepared by the production method of the granular full-degradable environment-friendly starch or modified starch master batch. The formula is simple, the content of starch or modified starch is high, flexible use of downstream customers is not affected, and the obtained product can becompletely biodegraded and is environmentally friendly.

The invention provides a direct expansion type ground source heat pump refrigerant leakage-proof device and a method thereof. The device is characterized in that on the basis of a compressor of a direct expansion type ground source heat pump system, a four-way reversing valve, an overground heat exchanger, a throttle valve, a buried heat exchanger and other main components, a low-pressure liquid storage device, an electric heater, a first flow meter, a second flow meter, a refrigerant pump, a low-pressure gas storage device, a gas-liquid separator, a temperature sensor, a controller and corresponding electromagnetic valves and pipelines are additionally arranged, and normal heat exchange of refrigerants, leakage detection judgment of a leakage-proof device and refrigerant recovery after leakage occur are achieved through switching of the electromagnetic valves. The device not only can accurately detect the leakage of the refrigerant, but also can further recover a large amount of refrigerant in a system into the system at an initial stage of leakage, so influence on the environment is reduced, and safe operation of the compressor of a heat pump system is ensured.

The invention relates to an automatic logistics sorting device based on the Internet of Things. The automatic logistics sorting device comprises a chain plate conveying device and goods, wherein a long-strip-shaped groove is formed in a chain plate of the chain plate conveying device; clamping blocks are arranged at the upper ends of first rotating shafts, and inner chambers are formed in the clamping blocks; a roller is arranged in the middle of a second rotating shaft, and a first pressure sensor is arranged on the roller; motors are arranged on the inner chambers, and a length measuring and calculating assembly is arranged on the chain plate; a first support is arranged on the chain plate conveying device, a scanning device is arranged on the first support, and a height measuring device is arranged on the first support; and a first conveying device is arranged below the chain plate conveying device. The goods are straightened through the clamping blocks on the left side and the right side together, the width of the goods is accurately measured, and bar codes can be recognized by the scanning device more accurately and clearly. Meanwhile, the length and height of the goods are measured through the length measuring and calculating assembly and the height measuring device, and therefore the size of the goods is accurately calculated. Output shafts of the motors rotate to give oblique backward thrust to the goods, so that the risk that the goods fall or are collided and damaged is reduced.

The invention discloses a method and a device of flow velocity measurement of a space medium based on chirp signals. The method determines the transmission time of signals according to simulated chirp signals sent and received by a transmitter module and a receiving module, and then determines the flow velocity of the medium according to the physical relation of the velocity and the time. The device comprises an operation module, a processing module, an output display module, the transmitter module and the receiving module. The processing module is connected with the operation module, the output display module the transmitter module and the receiving module respectively, the processing module carries out data processing according on the instructions input by the operation module, the wave forms and the data of measurement signals are transmitted through the transmitter module and received by the receiving module, the data of the received signals are obtained through an analog-digital converter, the measurement results of the flow velocity of the medium are obtained by analyzing and processing the data of the received signals, and results are transmitted to the output display module. The method and the device of the flow velocity measurement of the space medium based on the chirp signals are high in measurement precision, strong in anti-jamming capability, and low in calculation quantity, and the device is simple in structure, convenient to use, and low in cost.

The invention relates to the technical field of sewage treatment, in particular to a black water degradation agent which is prepared by mixing an oxidizing agent, sodium citrate, sodium chloride, sodium pyrophosphate and an aromatic. A preparation method of the black water degradation agent comprises the following steps of: uniformly stirring the oxidizing agent, the sodium citrate, the sodium chloride, the sodium pyrophosphate and the aromatic at normal temperature, and performing extrusion forming by using a tablet press to obtain the black water degradation agent. Compared with the prior art, the degradation agent has the following beneficial effects that firstly, peculiar smell is eliminated, the effect of the degradation agent is improved, and the service life of the degradation agentis prolonged; and secondly, the smoothness of the wall of the closestool is improved, excrement is prevented from being hung on the wall, the color of black water is changed, and the visual impact ofhuman excrement on people is reduced.

The invention discloses a tipping bucket type crude oil water content online monitoring device and an online monitoring method. The device and the method are designed for crude oil water content online monitoring at the same time of oil well metering. The tank body of the device is equipped with an exhaust port, a liquid inlet, a liquid outlet, a sewage outlet and a data processing and monitoring instrument. A center shaft in the tank body is connected to a mass sensor and a tipping bucket able to make 90-degree rotation around the center shaft. Within a certain period of time, the accumulated total volume and total mass of the liquid inverted by the tipping bucket are measured and recorded, the water content of crude oil within the time period can be calculated by combining the crude oil density and the water density. The device provided by the invention has precise measurement performance, can carry out crude oil water content online monitoring at the same time of oil well metering. With the advantages of simple principle and low cost, the device can improve the automation degree and timeliness of water content monitoring, simplify the workload of on-site manual sampling testing, and reduce the labor intensity of workers.

The invention discloses an amniotic fluid drainage bag for a gynecology department. The amniotic fluid drainage bag comprises a joint, a connecting tube, a metering bottle and a fluid collection bag, wherein two ends of the connecting tube are respectively connected with the joint and the metering bottle; a flow velocity control switch is mounted below the joint; an observation window is formed below the flow velocity control switch; a fluid outlet valve is arranged at the bottom of the metering bottle; the fluid collection bag is arranged on the side face of the metering bottle; a connector is arranged on the side face, which is close to the metering bottle, of the fluid collection bag; the connector is arranged at the upper end of the metering bottle and the fluid collection bag; a suspender is arranged at the top of the fluid collection bag; the fluid outlet valve is arranged at the bottom of the fluid collection bag. According to the amniotic fluid drainage bag disclosed by the invention, the flow velocity control switch and the observation window are arranged on the connecting tube, so that the flow velocity of fluid is easily judged; with the adoption of a split design of the metering bottle and the fluid collection bag, accurate measurement of repeated drainage is facilitated; a precision flow velocity switch at the bottom of the metering bottle contributes to collecting a small amount of fluid during detection.

The invention relates to the technical field of thermocouple thermometers, in particular to an adjustable thermocouple thermometer base, which solves the problems that in the prior art, when a thermocouple thermometer is installed at a fixed position and large fluctuation is generated on the liquid level, the thermometer is located at different depths, the deviation of the temperature measurementrange of the thermometer is too large, and the measurement of the accurate value of the solution temperature is reduced. The adjustable thermocouple thermometer base comprises a thermometer body, thesurface of the thermometer body is sleeved with an adjusting rod, the top of the adjusting rod is fixedly connected with a connecting block, a limiting mechanism used for fixing the thermometer body is arranged in the connecting block, and the surface of the adjusting rod is sequentially sleeved with an adjusting plate and a lifting plate in the axial direction of the adjusting rod. The height ofthe thermometer is adjusted through the adjusting rod, the thermometer is ensured to be located at the uniform depth of a solution, operation is easy, and accurate measurement of the same position ofthe solution temperature is facilitated.