43results about How to "Satisfy sampling requirements" patented technology

The present invention relates to a system for realizing simultaneous measurement of a combustion temperature field and a velocity field, comprising a first CCD camera, a first light split wedge and alaser. A second CCD camera is disposed at bottom left of the first CCD camera and an imaging plate is mounted at the right side of the second CCD camera. A Longkey grating is disposed at the right side of the imaging plate and a first plane reflecting mirror is mounted at the right side of the Longkey grating. A second light split wedge is disposed below the first light split wedge and the first light split wedge is located below a second plane reflecting mirror. The laser is mounted at the right side of a synchronous controller and the synchronous controller is located below the second CCD camera. The system combines a particle image velocimetry (PIV) with a light deflection imaging principle for measuring a three-dimensional velocity field of a flow field using the PIV and measuring a three-dimensional temperature field of the flow field using the light deflection imaging principle. While the two are combined, the three-dimensional velocity field and temperature field of the combustion field are simultaneously obtained.

The invention discloses a dual-polarization broadband weak coupling feed source array and relates to a phase array feed source receiver in the radio astronomy field. The dual-polarization broadband weak coupling feed source array can be used in feed sources of reflector antennasin the field of communication, observing and control and monitoring. According to the distribution rules of a reflector antenna focal plane field, a hexagonal reflection back cavity vibrator is distributed in a hexagonal small-space distribution mode to form a feed source array, so that energy receiving is facilitated, sampling of a focal plane field distribution is met, and good broadband characteristics and weak array coupling can be achieved. The hexagonal reflection back cavity vibrator comprises a radiator, a coaxial feeder, a hexagonal reflection back cavity and a matching disc, wherein the reflection back cavity adopts a small hexagonal structure, and array forming is facilitated.

The invention discloses a phase encoding laser imaging radar based on microwave photonic signal processing. The detection of a phase encoding signal requires rapid signal sampling of a high speed detector. The laser signal sampling speed of an array detector applied to a laser imaging radar is limited by a production process, which cannot meet the signal sampling speed requirement of a large-array phase encoding laser radar. The resolution of phase encoding laser imaging radar ranging is low. According to the invention, an optical device is used; a microwave photonic signal processing method is used to complete the convolution process of an echo signal and a reference signal; the convolution process comprises the product process of the echo signal and the reference signal in a laser modulator/demodulator and the accumulation process of signal product in an accumulation type detector; the limits of the sampling rate of the detector and total signal bandwidth on range resolution is broken; the requirement on the sampling rate of the detector is reduced; and the range resolution and the signal processing rate of a laser radar system are improved.

The invention provides a soil sampling device. The soil sampling device comprises an outer pipe, wherein a hollow sampling head is arranged at the lower part of the outer pipe; the sampling head is provided with a peripheral side wall for forming a hollow inner cavity; the sampling head is provided with a sampling hole communicated with the hollow inner cavity; an inner rod which can move back and forth in an up-down direction is arranged in the outer pipe; the inner rod is provided with a blocking structure for correspondingly opening and blocking the sampling hole when the inner rod moves up and down; the sampling hole is formed in the peripheral side wall; the sampling hole is provided with an inner hole which extends to an inner wall surface toward the hollow inner cavity of the peripheral side wall; the inner hole is higher than the bottom of the hollow inner cavity in the up-down direction; and the blocking structure is located in the hollow inner cavity and is used for opening and blocking the sampling hole through controlling the opening and closing of the inner hole when the inner rod moves up and down. Soil entering the hollow inner cavity falls into the bottom of the hollow inner cavity, and the soil is not pushed out of the hollow inner cavity by the blocking structure on the inner rod, so that the sampling success rate is improved.

The invention relates to an automatic sampling device of a dissolution tester. The automatic sampling device comprises a multi-channel valve group, wherein the multi-channel valve group comprises fivebranches; a power pump is connected with a public channel of the multi-channel valve group; a sampling needle is connected with the first branch of the multi-channel valve group; a dissolution cup isconnected with the second branch of the multi-channel valve group; a sample injection needle is connected with the third branch of the multi-channel valve group; a liquid supplementing groove is connected with the fourth branch of the multi-channel valve group through a liquid supplementing pipeline; the fifth branch of the multi-channel valve group is communicated with external air. According tothe automatic sampling device of the dissolution tester, provided by the invention, the power pump can be communicated with the corresponding pipeline under different conditions; in an automatic sampling process of a dissolution experiment, operation including automatic sampling, automatic liquid supplementing, automatic pipeline emptying, automatic pipeline washing and the like can be rapidly and accurately finished; sampling requirements of pharmacopeia on the dissolution experiment are met; accurate, reliable and efficient sampling is realized, and a condition that a sample is polluted byadjacent sampling points is avoided.

The invention discloses a device for detecting an oxygen concentration, and relates to the gas concentration detection technology field. The device comprises a detection circuit board. A detection channel is arranged in the detection circuit board. The detection circuit board is detachably connected with the detection circuit board. Sealing layers are arranged at two ends of the detection channel respectively. Supersonic wave transmit-receive sensors are arranged at two sides of the detection circuit board respectively. The probes of the supersonic wave transmit-receive sensors are sealed by the sealing layers at two ends of the detection channels respectively. A gas sample channel is arranged above the detection channel. The gas sample channel is parallel to the detection circuit board and is arranged crossed with the detection channel. One end of the gas sample channel is equipped with a gas inlet, and the other end of the gas sample channel is equipped with a gas outlet. A diffusion channel is arranged between the gas sample channel and the detection channel. The structure is simple and reasonable, measuring is accurate, and the cost is lowered.

The invention provides a portable device and method for radioactive element enrichment sampling. The device comprises a water pump and an enricher, wherein the water pump is used for drawing a water sample from water to be sampled and enabling the water sample to flow into the enricher; an absorber is arranged in the enricher, and the enricher is used for performing radioactive element enrichment sampling on an inflowed water sample by utilizing the absorber. Through the use of the device, the environmental water sample can be directly extracted, a radioactive isotope in a very low content in the environmental water sample is enriched, the radioactive isotope with enough activity is accumulated for achieving subsequent measuring sensitivity, and particularly the device is suitable for sampling and collecting a caesium isotope. The device replaces a traditional sampling method of transferring a big-volume water sample to a laboratory, and the device has the advantages that the size is small and exquisite, and the structure is compact, so that the device is convenient to carry and transport.

The invention provides air quality detection equipment and method. The air quality detection equipment comprises a dust particle concentration measuring module, a pollution gas concentration measuringmodule and an air driving module, wherein the dust particle concentration measuring module is used for measuring and sampling dust with different grain diameters respectively; the pollution gas concentration measuring module is serially connected with the dust particle concentration measuring module, and is used for carrying out synchronous sampling on the concentration of pollution gas; the airdriving module is used for driving air to flow through the dust particle concentration measuring module and the pollution gas concentration measuring module. Synchronous and accurate sampling and accurate measurement for dust particles and pollution gas are realized by setting the dust particle concentration measuring module and the pollution gas concentration measuring module; the sampling speedand measurement response speed of pollution gas are improved by setting the air driving module; the dust particle concentration measuring module and the pollution gas concentration measuring module are serially connected in the flowing direction of air, to fulfill the purpose of synchronous sampling, so that the integration of equipment is improved, and the equipment size and processing difficultyare reduced.

The invention discloses a sulfur hexafluoride sampling system. The system comprises an electronic mass flow controller, a pressure sensor and a voltage monitoring module, which are all connected witha processor CPU through an A/D conversion module; and the system further comprises the processor CPU, a display screen, a keyboard, a solenoid value, a vacuum pump and a power supply circuit, whereinthe processor CPU is further connected with the electronic mass flow controller through a D/A conversion module; the processor CPU is also connected with the display screen for displaying flow data ofsulfur hexafluoride; the keyboard is connected with the processor CPU and used for inputting a control signal for the sulfur hexafluoride flow; the processor CUP controls the solenoid valve and the vacuum pump through a driving circuit; the power supply circuit is connected with the processor CPU and used for providing power for the whole system. The sulfur hexafluoride sampling system provided by the invention is invented to be portable, has own batteries and also can be connected with an external power supply, wherein a fast pipe insertion connection mode is used for a gas path connector, and thus, works can be carried out quickly at site. For the sulfur hexafluoride sampling system, intelligent automatic operations are realized through a system on chip integrated circuit, all switchingon and switching off and flow control can be in timed control through programming, and a status alerting and warning function is provided.

The detection structure for simultaneously detecting the hot carriers of several MOS devices includes: at least one polysilicon grid; source region and drain region separately on two sides of the polysilicon grid; virtual polysilicon grid separately on two sides of the source region and the drain region; several welding pads corresponding separately to the polysilicon grid, the source region, the drain region and the virtual polysilicon grid; and metal wires connecting the polysilicon grid, the source region, the drain region and the virtual polysilicon grid separately to the pads. By means of the control of the switch matrix in the testing stage, the present invention can test the hot carrier implantation of at least three MOS devices connected in parallel.

The invention discloses a sampling and sample preparation system for a cross-double rail train. The system is characterized by comprising lifting devices sampling trolley buses, sampling motors, an operating room, electromotors, a transverse support frame, vertical support frames, crushers, a PLC controller and dividers, the middle portion of the transverse support frame is provided with the operating room, the two ends of the transverse frame are slidably provided with the sampling trolley buses, the crushers are arranged on the lower portion of the sampling trolley buses, the dividers are arranged on the lower portion of the crushers, and sample collectors are arranged on the lower portion of the dividers; when sampling is carried out on the double-rail train, the sampling requirements of a large quantity of raw materials are met, the processes of sampling and sample preparation are performed separately for centralized management, the sampling speed is quick, the arrangement of a roller press and drying device can meet different requirements of sample preparation, the practicability is improved, when a sampling machine samples, the relative speed between a sampling machine and atrain carriage is zero, and no relative displacement occurs to cause the damage of the sampling machine; the servo performance is strong, and the protection function is strong.

The invention discloses a river ecological restoration system. The river ecological restoration system comprises a river ecological data analysis system and an ecological implementation system, the analysis method of the river ecological data analysis system specifically comprises the following steps of S1, water balance calculation, S2, leaked water calculation and S3, separation and reasoning ofthe climate change and human activities on the water resource influence quantity. The invention relates to the technical field of basin resource protection and utilization. According to the river ecological restoration system, the guarantee degree of drainage basin ecological water, the natural vegetation coverage and the change characteristics of soil drought are compared and analyzed before and after large drainage basin comprehensive management, and the guarantee effect of a large drainage basin comprehensive management mode on ecological water supply under the climate change background is quantitatively evaluated;; by constructing a quantitative relation model among river runoff volume, seepage quantity and a tree annual ring standard annual table, a new idea of reconstructing riverseepage quantity by using the tree annual ring standard annual table is provided, and water resource optimization management of a similar drainage basin in an arid region is realized.