263 results about "Grain moisture" patented technology

A yield monitor system is configured to determine how the calibration characteristics of a grain mass flow sensor on an individual combine are affected by grain moisture content and/or other grain parameters which can be measured instantaneously or periodically by the yield monitor system or its operator, or which can be observed by the operator, or which can be determined from other reference information, such as maps of where different grain varieties or hybrids were planted. Other systems, methods, and apparatuses are also provided.

The invention relates to an electrically-driven intelligent combine-harvester control system, and belongs to the field of agricultural machinery. Different sensors are used for detecting feed quantity signals, grain loss rate signals, grain moisture content signals, crop height signals, barrier existing situation signals, seed lift conveyer rotation speed signals, traveling speed signals, header height signals, threshing drum rotation speed signals and winder position and rotation speed signals of a harvester, measured values are sent to an ECU, after the compared processing is carried out between the measured values and setting values, the ECU sends out control commands, automatic adjustment on the traveling speed, the header height, the threshing drum rotation speed, the winder rotation speed and position and the centrifugal fan rotation speed is respectively carried out, corresponding alarm devices are started, and the harvester works in the best state. The intelligent level is improved, the grain losses are reduced, and the labor strength of a driver is greatly relieved.

A facility for controlling the grain moisture provided with a grain storage silo conveniently installed on a hard flat floor and inside of which an elevated floor comprising air passageways is provided, determining an air chamber inside the silo and below the perforated floor, into which previously conditioned air is blown by an air heater, wherein the control of hot air blowing times is determined based on means of modeling and calculating on and off times applied through an electronic control means, with the ability to read and record manual input data entered by an operator and reading data from a temperature sensor in the air chamber, below the perforated floor, further aided with an ambient temperature and moisture sensor, thereby causing the application of different stages of drying, re-humidification and maintenance of the grain moisture.

The invention discloses a low-temperature circulation dryer for crop seeds, which comprises a dryer body, a hoister, a draught fan, a hot-blast furnace, a heat exchanger, small air inflow angle boxes, air exhaust angle boxes, air inflow angle boxes, a grain discharge device, a delivery machine under the dryer and a grain-moisture and drying-temperature on-line detector. The low-temperature circulation dryer solves the problems of uneven material drying, higher energy consumption, a low annual utilization rate and the like in the prior art effectively, and has the characteristics of simple structure, simplicity in operation, high applicability, high-quality, efficient, safe and energy-saving low-temperature quick drying and the like.

The invention discloses a microwave on-line grain moisture content detection device and a method thereof. The device comprises a microcontroller, an interface circuit and a computer, which are sequentially connected with each other, and also comprises a high-frequency signal generator for generating a high-frequency signal, a high-frequency signal receiver for receiving the high-frequency signal which transmits through the grain, a signal regulation and detection circuit for detecting the amplitude value and phase difference of the high-frequency signal which is picked up by the high-frequency signal receiver and the high-frequency signal before transmitting through the grain and for transmitting the picked moisture content detection result to the computer through the microcontroller and the interface circuit, wherein the computer performs the density compensation for the moisture content detection result according to the density compensation algorithm. The auxiliary high-frequency signal amplitude value and phase difference detection technology and the density compensation algorithm are adopted to solve the density spacing influence of the grain particles.

The invention discloses a wireless sensor network monitoring system for the grain situation of a grain depot. The system comprises wireless sensor nodes, gateway nodes, a general packet radio service (GPRS) network, Internet and a monitoring center lower computer, wherein a group of wireless sensor nodes for acquiring grain situation parameters of the grain depot are connected with the GPRS network by a group of gateway nods; and the GPRS network is connected with the monitoring center lower computer by the Internet. The wireless sensor network monitoring system based on a ZigBee protocol can realize multi-parameter monitoring and monitor grain situation information such as temperature, humidity, grain moisture, mildew, insect pests and the like inside the grain depot in real time; and the GPRS network is connected with the Internet network, so the wireless sensor network monitoring system has low cost and high reliability, and is suitable for various grain storage depots.

The invention discloses an on-line resistance type moisture sensor, and relates to detection equipment for grain moisture. The moisture sensor comprises a sampling device and a detection control device, wherein the sampling device consists of a motor provided with a motor gear and two roller components provided with rolling gears; roller components are meshed with each other via the rolling gears, the motor gear is meshed with one rolling gear; a signal board is arranged between the two roller components; both the signal board and the motor are electrically connected with the detection control device; one ends of the two roller components are provided with one rolling gear, and the other ends of the two roller components are respectively provided with a small rolling wheel and a large rolling wheel; and a gap between the small rolling wheel and the large rolling wheel is 0.3 mm to 1 mm, the width of the periphery of the small rolling wheel is 4 mm to 10 mm, and the width of the periphery of the large rolling wheel is 12 mm to 40 mm. The moisture sensor disclosed by the invention can automatically detect grain crops, is high in accuracy of detection of grain crop moisture, and is longer in service life and lower in application cost.

The invention discloses a high-efficiency online drying system for grain moisture, and relates to the technical field of drying equipment. The high-efficiency online drying system for the grain moisture comprises a power supply control unit (110), a touch screen display control unit (120), a PLC (Programmable Logic Controller) data control unit (130) and a grain moisture detecting unit (140), wherein the PLC data control unit (130) is respectively interconnected with the touch screen display control unit (120), the power supply control unit (110) and the grain moisture detecting unit (140). On the basis of the resistance moisture detecting method, the high-efficiency online drying system for the grain moisture applies the nonlinear processing capacity of an RBF (Radial Basis Function) neutral network algorithm to fuse the measured data, and can automatically implement various corrections and error compensations for the measured value, so that the reliability and measurement precision of the grain moisture detecting system are improved; meanwhile, a real-time control system based on a PLC and matched with grain drying equipment is independently researched and developed to realize the functions of automatic control, online display, fault alarming and grain moisture detection in the grain drying process.

The invention provides a sensor network grain situation monitoring system based on a bus and a wireless structure, which can monitor grain situation information in a granary such as temperature, humidity, grain moisture and insect damage in real time. The monitoring system consists of grain situation parameter monitoring nodes which are buried into grains in the granary, relay nodes on a grain surface layer in the granary, and granary main control nodes, wherein a plurality of grain situation parameter monitoring nodes are connected and communicated with each other through a bus-organized structure and the relay nodes which are arranged on the top layer, and the relay nodes are communicated with the main control nodes for managing the granary through a wireless network; and the grain situation monitoring nodes are responsible for acquiring grain situation parameters in the granary such as the temperature, the humidity, the grain moisture and the insect damage, and the grain situation parameter information acquired by various monitoring nodes is transmitted to the granary main control nodes through the relay nodes on the top layer.

A grain moisture sensor having a sensor cell that includes a driven plate, a sense plate proximate to and substantially parallel with the driven plate for capacitive measurement across a spacing between the driven plate and the sense plate, and a fill plate adjacent the sense plate and substantially parallel with the driven plate for sensing whether the spacing is filled with grain. The grain moisture sensor provides for measuring real and imaginary components of an excitation voltage applied to the driven plate, measuring real and imaginary components of a sense current sensed at the sense plate, calculating a complex admittance of the cell, calculating a complex admittance of a reference admittance, and calculating a grain complex permittivity.

The invention discloses an intelligent energy-saving control system of a grain drying tower, and relates to the field of intelligent energy-saving control over the grain drying tower. The purpose is to solve the problems that according to an existing grain drying tower, fuel and electric energy are wasted, the service life of a heat exchanger can not be guaranteed, and all drying sections can not achieve gradient temperature air delivery. The intelligent energy-saving control system comprises a hot blast heater coal feeding hopper control unit, a hot blast heater combustion chamber temperature detection and control unit, a combustion chamber negative pressure value detection and control unit, a heat exchanger front end and rear end temperature detection and control unit, a detection and control unit for gradient air delivery temperature of air heaters, a grain storage section grain position control unit, a detection and control unit for grain temperature and moisture of all the drying sections, a detection and control unit for dead steam temperature and humidity and steam exhausting air speed of steam exhausting ports of all the drying sections, a cooling section grain temperature detection and control unit and a drying tower grain discharging part grain moisture detection and control unit. The intelligent energy-saving control system performs intelligent control based on a PLC and is suitable for intelligent energy-saving control over the grain drying tower.

The invention discloses an intelligent grain drying control method. According to the method, a temperature signal, a humidity signal and a grain moisture value are utilized for judging whether delayed-mode drying is required to be performed on grains or not and a heating control signal is obtained or other modes are started according to the judgment result, so that finally a target moisture value of the grains can be achieved. The intelligent grain drying control method can be used for achieving the intelligent management in a drying process, controlling the drying process by utilizes a fuzzy predictive control method, and adjusting drying time in a predictive way to adjust and control the grain drying time relatively accurately; the intelligent grain drying control method can be used for effectively overcoming a large delay link, shortening the adjusting time and eliminating the systematic quiet error.

The invention relates to a grain moisture analysis meter which comprises a hopper, a plastic plate, a sensor plate, a base plate, a base plate motor and a control circuit. The hopper is vertically placed, the top of the hopper is provided with an opening used for receiving grains, the bottom of the hopper is sealed by the base plate, the base plate opens and closes the hopper under the drive of the base plate motor, at least one side wall of the hopper is provided with a slot, the plastic plate is embedded into the slot, the sensor plate is attached to the plastic plate to be arranged on the outer side of the hopper and insulates from the hopper, and the hopper and the sensor plate are made of conductive materials and form a positive electrode and a negative electrode of the capacitive grain moisture analysis meter. The invention further relates to grain moisture analysis method and a grain drying system.

The invention discloses an intelligent controller of a grain drier. The intelligent controller comprises a grain moisture measuring circuit, an air temperature measuring circuit, a single chip microcomputer processing unit, a keyboard input circuit, an over-limit alarm circuit, a liquid crystal display circuit and a motor control circuit, wherein the grain moisture measuring circuit is used for measuring moisture of grains at the outlet of the grain drier; the air temperature measuring circuit is used for measuring airflow temperature in the drier; the motor control circuit is used for controlling a grain discharging speed; and the grain moisture measuring circuit, the air temperature measuring circuit, the keyboard input circuit, the over-limit alarm circuit, the liquid crystal display circuit and the motor control circuit are respectively connected with the single chip microcomputer processing unit. An AT89S5X series chip and some peripheral devices are only used in the intelligent controller disclosed by the invention; the drying time is controlled by acquiring temperature of dry air and moisture content of grains at the outlet of the grain drier, so that the drying process is controlled; meanwhile, the intelligent controller also has an alarming and displaying function if drying conditions are excess and has higher flexibility and practicability; and the intelligent controller of the grain drier is installed on a universal grain drier and has a very low cost.

The invention discloses a resistance type grain moisture tester. The resistance type grain moisture tester comprises a temperature sensor, a sampling resistor, a signal conditioning unit, a micro-control unit, a driving unit, a communication unit, an input unit and a display unit. The resistance type grain moisture tester acquires a resistance value of grain through the sampling resistor, the resistance value is compared to a corresponding relation of preset moisture resistance of the micro-control unit to obtain a grain moisture measurement initial numerical value, meanwhile, the temperature sensor acquires a temperature numerical value of the grain, the temperature numerical value is transmitted to the micro-control unit to correct the grain moisture measurement initial numerical value so as to obtain a grain moisture measurement final numerical value, and therefore, grain moisture is measured accurately in real time. The resistance type grain moisture tester has the characteristics of high anti-interference capability, simple circuit structure and low cost.

The invention discloses a grain moisture online detection circuit. The grain moisture online detection circuit comprise a power supply circuit, a constant-current source circuit, a single-chip microcomputer system, a signal amplification circuit, a Nixie tube display circuit, a motor anddrying machine control system, a control knob, a key circuit and a temperature compensation circuit, wherein the signal amplification circuit, the Nixie tube display circuit, the motor and drying machine control system, the control knob, the key circuit and the temperature compensation circuit are connected with the single-chip microcomputer system through data lines, the power supply circuit is connected with the other circuits, the constant-current source circuit is formed by connecting a voltage stabilizing circuit and a constant-current source measuring circuit, and the output end of the constant-current source circuit is connected with the signal amplification circuit. The grain moisture online detection circuit has the advantages that the measuring response speed is high, precision can be as high as +/-0.5%, manpower source waste can be reduced, the production cost is reduced, measuring results are accurate and the practicality is high.

The invention discloses a method for measuring the grain moisture content based on a microwave frequency sweep technology. The measuring method adopts a grain moisture content measuring device based on a frequency sweep microwave penetration method. The method mainly comprises the steps of setting an initial microwave frequency sweep signal MSS according to the characteristics of different kinds of grains, removing poor frequency points corresponding to a great reflection coefficient [Gamma] and standing-wave ratio [Rho] in the MSS by taking the automatic alignment of microwave antennas as a basis to obtain an optimized frequency sweep signal MSS'; determining and adjusting to the optimum measurement distance and inter-antenna distance according to three conditions such as an antenna far field condition, the representativeness of the moisture content measurement result and microwave space transmission loss reduction; mutually interacting the radiation optimized frequency sweep signal MSS' and the grain to be measured, inputting the microwave attenuation A and the microwave phase shift [Phi] into a grain moisture content prediction model to calculate the grain moisture content measurement result. The method not only uses the microwave frequency sweep technology, but also optimizes the used frequency sweep signal, is comprehensive in consideration when the microwave attenuation is calculated, and improves the accuracy of the grain moisture content measurement.

The invention relates to a material rolling device for an online grain moisture meter, and belongs to the technical field of agricultural testing devices. The device comprises a shell with a feeding hole, wherein a material guide block below the feeding hole is fixed in the shell; coaxial round installation holes and coaxial kidney-shaped installation holes are formed at two sides of the shell under the material guide block respectively; the round installation holes and the kidney-shaped installation holes in two sides support corresponding transmission shafts through front and back rubber damping sleeves respectively; the two transmission shafts are provided with locating rolling wheels and floating rolling wheels between the front rubber damping sleeve and the back rubber damping sleeve; and one side, far away from a fixing rolling wheel, of each floating rolling wheel is provided with an elastic part for pressing the fixing rolling wheel. According to the material rolling device for the online grain moisture meter, an ''adhesion'' phenomenon is effectively avoided while the rolling stability is significantly improved and a ''jump'' phenomenon is removed; and shifting of the floating rolling wheels on a kidney-shaped installation seat can be overcome by increasing rolling force when a hard foreign matter passes through the rolling wheels, and thus the damage to the rolling wheels is avoided and the foreign matter is timely discharged.

The invention relates to a preparation method for high-performance absorbent resin. The preparation method comprises the following steps that: (1) wide super-absorbent resin gel with the water content being 50wt% which is obtained by free radical polymerization reaction on a continuous cycle belt is pelleted and a redox initiator is added during gel pelleting; (2) after pelleting, the gel grains are evenly distributed on a circulating air belt-type machine for drying, the drying process is divided into three stages of drying constant speed stage, drying speed reduction stage and drying cooling stage and the temperature and the air speed of hot air of a drier are adjusted according to the change of the water content of the gel at different drying stages; and (3) the dried materials which are obtained are crushed, grinded and screened to obtain the grains with qualified grain diameter; the surface of the super-absorbent resin grains with qualified grain diameter is coated with a superficial cross-linking agent; and the grains are heated and an anti-yellowing assistant and a grain moisture-proof clustering agent are added during the process that the materials are cooled. The absorbent resin gel prepared by the method provided by the invention has excellent physical usability.