61results about How to "Reduce the amount of detection" patented technology

The invention discloses a control circuit for a three-phase high power factor rectifier, and belongs to the field of electrical control. The control circuit comprises an input high-frequency filter circuit, a three-phase input inductor, a three-phase rectifier circuit, a switch tube power circuit, an output rectifier filter circuit, a voltage-dividing detection circuit, an input current detection unit, a single cycle controller and a switch tube driving circuit. A three-phase high power factor can be rectified, high-precision stable output voltage can be obtained, and interference resistance is high.

The invention provides a planting system and a planting method for controlling the temperature of vegetable roots; wherein the system comprises a hydroponic planting nutrient solution pool and a nutrient solution sterilization temperature-control trough; the nutrient solution sterilization temperature-control trough is arranged beside the growing period hydroponic pool, is internally provided with a precise filter, a nutrient solution cooling group, a temperature sensor group and an electric heater heating group and is externally provided with a condensation compression unit that is connectedwith the nutrient solution cooling group; and a ultraviolet sterilization device is arranged above the nutrient solution sterilization temperature-control trough. The method comprises the following steps of: planting the hydroponic vegetable in the planting system for controlling the temperature of the vegetable roots; opening the nutrient solution valves arranged at two sides of the planting pool by the temperature-control planting system; pouring the nutrient solution into the nutrient solution sterilization temperature-control trough; filtering the solution by a precise filter; reducing the temperature when the solution flows by the nutrient solution cooling group subsequently or increasing the temperature by the electric heater heating group so as to lead the temperature of the nutrient solution to be kept at about 18 DEG C in summer and at about 22 DEG C in winter and lead the temperature of the vegetable plant to be reduced or increased, thus leading the vegetables to have the capability of resisting hot or cold weather.

The invention relates to a multicolor infrared low-emissivity environmental protection coating. The coating comprises a component A and a component B, and when in use, the component A and the component B are uniformly mixed according to the mass ratio of 1:10. The component A is aliphatic polyisocyanate; the component B comprises the following components in percent by mass: 20 to 30 percent of fluorocarbon resin, 35 to 50 percent of special pigment, 0 to 5 percent of filler, 1 to 5 percent of a dispersant, 0.1 to 1 percent of a flatting agent; 3 to 8 percent of a directing agent, 0.01 to 0.3 percent of a drier, and 15 to 25 percent of a mixed solvent, wherein the special pigment comprises the following pigments: 0 to 10 percent of titanium dioxide rutile, 0 to 5 percent of 1, 4 diketopyrrolopyrrole series organic red pigment, 0 to 25 percent of chromium oxide green, 0 to 8 percent of titanium-nickel yellow pigment, 0 to 5 percent of black pigment, and 50 to 95 percent of coated color metallic pigment. The average emissivity of the thermal infrared band of the coating is 0.40 to 0.65, and the heavy metal content meets the requirement.

The invention discloses a dual spectrum technology based leaf and stalk separating and cutting quality detection device and detection method. The detection device comprises a spreading device (1), a paving machine (2) arranged under the spreading device (1), an X ray detector (3) arranged under the paving machine (2), a visible light detector (4) arranged under the outlet of the X ray detector (3), a receiving device (6), a frame (5), and a control cabinet (7). The receiving device (6), the frame (5), and the control cabinet (7) are arranged under the outlet of the visible light detector (4).By adopting a visible light and X ray imaging technology and corresponding image algorithm, the tobacco leaf area, tobacco stalk area, and tobacco stalk length can be obtained; the leaves and stalks in a same image do not need to be separated, and the identification accuracy of image detection is improved. The leaf structure and long stalk rate can be detected, the stalk containing rate of leavesand leaf containing rate of stalks can be detected, the stalk density and leaf density are not needed during the index calculation process, and the leaf cutting quality indexes can be automatically calculated out.

The invention discloses a camera calibration mark center coordinate extraction method. The calibration mark center coordinate extraction method applies the following steps that (1) an image is divided into areas, and different parameters are set for different areas to perform Hough circle detection so that a circular mark image is obtained; (2) the inscribed polygon of the circular mark image in the step (1) is extracted; (3) Hough linear detection is performed in the inscribed polygon, and the intersection point coordinates of straight lines are extracted; and (4) reliability of the intersection point coordinates is detected, coordinates of the center of circle obtained in the step (1) are compared and a threshold is set, intersection points outside the threshold are deleted, the intersection points of the straight lines within the threshold are obtained, and the mean value of the intersection points of the straight lines is obtained and calibration mark center coordinates are obtained. The image is divided into areas, the parameters of different areas are respectively set to perform circle detection in the circle detection process, and the mean value is obtained according to the intersection point coordinates of the straight lines and the mark center coordinates are obtained so that extraction precision of the center coordinates is greatly enhanced.

The invention discloses a sensorless brushless DC motor commutation position correction system and method. The system comprises a DC power supply, a three-phase full-bridge inverter, a brushless DC motor, a terminal voltage step-down and filtering circuit, a counter potential zero crossing detection circuit, a DC bus and a b-phase terminal voltage detection circuit, a digital signal processor anda PWM signal driving circuit. The counter potential zero crossing offset caused by filtering and the commutation position offset caused by the hardware circuit device delay and the software calculation delay can be simultaneously compensated by detecting the DC bus voltage and the terminal voltage. Compared with the existing sensorless brushless DC motor commutation position correction system, therequired detection amount is low, the calculation workload is low, the rotor commutation position offset can be quickly and accurately corrected, the accurate rotor commutation position can be obtained and the control and operation performance of the brushless DC motor can be enhanced. The sensorless brushless DC motor commutation position correction system has high universality and is suitable for the sensorless brushless DC motor control system using multiple control strategies.

The invention provides a fault diagnosis method for a sequentially switched parallel regulator. The method comprises the following steps that the work state of the sequentially switched parallel regulator in a faultless condition is analyzed; a fault mode of the sequentially switched parallel regulator is obtained by analysis; a detection point is selected for the solar cell sub-array voltage corresponding to each shunting adjustment circuit, and a sampling frequency is selected; the time length of sampling data is selected, and covers the complete switching period of the solar cell sub-arrayvoltage; the solar cell sub-array voltage corresponding to each shunting adjustment circuit is sampled, and an adjusted level is searched for; according to the found adjustment level, fault diagnosisis carried out; and sampling and diagnosis in the next round is turned to. According to technical schemes of the invention, it is only required to add the detection quantity of the solar cell sub-array voltage to each shunting adjustment circuit to carry out detection and positioning accurately, the method is simple, the fault detecting rate is high, the fault can be located rapidly and diagnosedrapidly, and fewer detection quantities are added.

The invention provides a kit for detecting markers of ovarian cancer cells in peripheral blood. The kit comprises magnetic beads and corresponding buffer reagents, wherein the magnetic beads are combined with ovarian cancer antibodies. According to the kit, the biological activity of tumor cells in blood circulation of a patient with ovarian cancer is detected through molecular biology methods including magnetic bead separation, RT-PCR and the like, and genes of a drug treatment target are determined; and by detecting the expression levels of EpCAM-2, Muc1, Her2, Wt-1, Pax8 and P16, the development and outcome of ovarian cancer are determined, and the theoretical basis and the experimental evidence are provided for the individual-based treatment of ovarian cancer. The kit provided by the invention is low in sample detection amount and high in detection sensitivity and has little harm to a patient, and the detection rate can reach up to 100%.

The invention provides a detection method for a memory cell in SRAM. According to the invention, the input terminal of a first inverter in the memory cell is connected with the output terminal of the first inverter and with the input terminal of a second inverter; since the input and the output of the first inverter are equal and the input and the output of the second inverter accord with the characteristic curve of the inverter, if the first inverter matches with the second inverter, the output of the first inverter is equal to the output of the second inverter under the condition that the input of the first inverter is equal to the input of the second inverter; thus, under the condition that the input of the first inverter is equal to the input of the second inverter, if the output of the first inverter is not equal to the output of the second inverter, the first inverter does not match with the second inverter and it is certain that the threshold-voltage of at least one transistor drifts. As the memory cell is used as a detection unit, individual detection of every MOS transistor in the memory cell is avoided; detection quantity of the whole SRAM is reduced; efficiency is improved; cost is low; and results are accurate.

The invention provides a fabric tightness detecting apparatus. The fabric tightness detecting apparatus comprises an apparatus body, the apparatus body is connected to a PLC industrial control machinearranged at the outer part of the apparatus body in a communication mode, the apparatus comprises a desk body, and further comprises a light source mechanism, a test box and a light receiving mechanism arranged on the desk body. The light source mechanism is arranged on one side of the top of the desk body, the light receiving mechanism is arranged on the other side of the top of the desk body, the test box is arranged between the light source mechanism and the light receiving mechanism, and central axial lines of the light source mechanism, the test box and the light receiving mechanism areon a same vertical plane. The fabric tightness detecting apparatus is based on a box method principle of light transmission, detecting is simple, detecting quantity is small, manual labor intensity islowered, the detecting efficiency is improved, and meanwhile, accuracy of detecting results is further improved, stability and reliability are high, and the fabric tightness detecting apparatus has good practical values.

The invention discloses a circuit board signal tracing detection system, and the system comprises a first determination module which is used for obtaining the layout information of a circuit board, and determining a layout map of the circuit board according to the layout information; the construction module is used for acquiring signal information of a plurality of detection points on the circuit board and constructing a signal distribution diagram of the circuit board according to the signal information and the layout map; the first acquisition module is used for determining a target area according to the signal distribution diagram and acquiring an image of the target area as a to-be-detected image; the recognition module is used for inputting the to-be-detected image into a pre-trained image recognition model and outputting a plurality of signal lines; and the detection module is used for determining a target signal line in the plurality of signal lines, detecting the target signal line and displaying a detection result. The detection quantity can be reduced, the detection rate can be improved, the signal line on the circuit board can be accurately detected, and the maintenance timeliness can be improved.

The invention discloses a multiplex RT-PCR (Reverse Transcription-Polymerase Chain Reaction) quick detection primer for H1 and H3 subtype SIVs (Swine Influenza Virus) and North America and Europe PRRSVs (Porcine Reproductive and Respiratory Syndrome Virus). The primer comprises four pairs of PCR primers which independently aim at four types of viruses, wherein four pairs of PCR primers are primers1 to 8 and independently have base sequences of sequence tables SEQ. ID. NO.1 to SEQ. ID. NO.8. Hereby, the inventor also researches a corresponding quick detection method and a kit thereof, and a detectable quantity for a recombinant plasmid standard substance can be lowered to 9.86*10<0>copies/[mu]L. The invention has the characteristics of high specificity, good sensitivity, short time consumption and low cost, provides a quick and convenient tool for detecting swinery mixed infection, lays a solid foundation for clinic quick authentication and detection and laboratory epidemiological investigation, is favorable for pig industry to formulate a disease prevention and control scheme in time, and reduces a swinery death rate and economic loss.

The invention discloses a blood sample treatment method. The blood sample treatment method comprises the following steps: providing a blood sample separation carrier provided with a sample adding cavity, a separation cavity, a sample adding position and a sampling position; a blood sample is added into the sample adding cavity through the sample adding position, the blood sample separation carrier is controlled to rotate at a preset rotating speed in an accelerated mode, and the blood sample in the sample adding cavity enters the separation cavity; the blood sample separation carrier is controlled to rotate at a constant speed at a preset rotating speed for a first preset time, so that a first component and a second component in the blood sample are separated, and the first component and the second component obtained through separation are contained in the separation cavity; controlling the blood sample separation carrier to decelerate and rotate for a second preset time until the blood sample separation carrier stops rotating, so that the first component in the separation cavity is collected in the space, close to the sampling position, of the separation cavity; and the first component separated in the separation cavity is extracted through the sampling position. The blood sample treatment method provided by the invention can reduce the detection dosage and sampling precision requirements of the blood sample.