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 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 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 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 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 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.