39results about How to "High practical significance" patented technology

An agricultural harvesting machine has a measurement device for investigating a crop flow conveyed through the harvesting machine. The measurement device includes at least one optical detection unit disposed at the crop flow for detecting light reflected by the crop and an evaluation unit for evaluating the spectrum of the detected light in order to derive properties of the crop. The evaluation unit is disposed at a position of the harvesting machine that is decoupled from mechanical loading by the crop flow to the greatest extent possible and is connected to the detection unit by way of at least one optical waveguide.

The invention relates to a sunshine tracking and concentrating method and a tracking-mode solar concentrating device, which belong to the field of high temperature applications of solar energy and can be applied in industrial production and heat sources for heating in life. The tracking solar concentrating device is the non-electric control tracking solar concentrating device which is mainly used for solving the problem of higher cost of an electric control high-temperature solar furnace device. A rotating rod (2) is connected with a shaft of a plane mirror (29), one end of a telescopic support (3) is connected with a shaft of a rotary support (35), and the other end thereof is connected with the first plane mirror (29). The first step is to lead the rotating rod (2) to be parallel to an earth axis of the earth, the second step is to lead an angle of a conical curved surface of 45 degrees on a normal line (28) and the rod (2) to be one half of a declination angle at the day, when the maximum sunshine height angle is achieved and the time is accurate to seconds, the rotary support (35) is synchronously driven with the sun, thereby obtaining reflected light (34) which is coincided with the rod (2) and consistent in the direction, and a plurality of the devices can achieve the condensing heating effect.

The invention provides an LED driving circuit based on double PWM signals, an LED lighting device, and a driving method. The LED driving circuit comprises a first PWM signal input end, a second PWM signal input end, a first electrode switching circuit and a second electrode switching circuit; a first LED lamp group, wherein the anodes of all the LED lamp beads in the first LED lamp group are connected with the first electrode end, and the cathodes of all the LED lamp beads in the first LED lamp group are connected with the second electrode end of the second electrode switching circuit; a second LED lamp group, wherein the cathodes of all the LED lamp beads in the second LED lamp group are connected with the first electrode end, and the anodes of all LED lamp beads in the second LED lamp group are connected with the second electrode end. After a first PWM signal and a second PWM signal are inputted, the electrode output by the first electrode end is opposite to the electrode output by the second electrode end, and the first LED lamp group or the second LED lamp group is turned on.

The invention discloses an epoxy modified fatty amine curing agent and application thereof in fixing glue for silicon ingot cutting, belonging to the field of photovoltaic material adhesives. The epoxy modified aliphatic amine curing agent comprises the following raw materials in percentage by mass: epoxy resin, an active diluent and polyamine. The epoxy fixing glue comprises a component A and a component B, wherein the component A comprises epoxy resin, an active diluent, a filler, a pigment, an anti-settling agent, an accelerant, a defoaming agent, a foaming agent and an adhesion promoter; and the component B comprises polymercaptan, the epoxy modified aliphatic amine curing agent, an active diluent, a plasticizer, an accelerant, a filler, a pigment, a defoaming agent and an anti-settling agent. The epoxy modified aliphatic amine curing agent provided by the invention is applied to the epoxy fixing glue used for temporarily bonding and fixing a metal workpiece plate and a plastic plate during silicon ingot diamond wire cutting. The fixing glue has the advantages of good flexibility, high bonding strength, low conductivity, high degumming speed and the like, has good temperature resistance, and can be cured at room temperature.

An optional combination method utilizing Xieqing Zao A to perform test cross on a plurality of male parents relates to the agricultural technology field. The optional combination method comprises the following methods of a first season: (1), introducing male parents with the best quality to achieve test cross with the Xieqing Zao A respectively, and arranging separation devices among cells to prevent pollen from being spread among the cells; (2), knowing about a period of duration and a head spreading period of each of the male parents in details, enabling the male parents and the Xieqing Zao A to achieve matching test cross according to phase difference; (3) observing the outcrossing maturing rate of each matching cell to reserving seeds with the outcrossing maturing rate higher than 85% and weed out seeds with the outcrossing maturing rate lower than 85%, observing other expression characters specified by seed production to weed out seeds with poor expression, independently harvesting, threshing and storing the seeds by the cells, and performing marks; a second season: separately planting seeds meeting the specifications of each cell in different cells, observing cultivated characters and biological characters of the seeds, observing and measuring the seeds subjected to plant diseases and insect pests, taking samples to perform rice quality appraisal, and reserving seeds meeting the standards in the cells to perform approval; a third season: fixing up test places, performing hybrid indica joint identification, and performing approval and promotion. The optional combination method is simple and practical, and the cultivated seeds are high in quality. Therefore, the optional combination method has high practical application significance and can increase grain yield.