He Yong

Bio: He Yong is an academic researcher. The author has contributed to research in topics: Node (networking) & Shortest path problem. The author has an hindex of 2, co-authored 5 publications receiving 11 citations.

Aquaculture water area dissolved oxygen control method and device based on microclimate

Abstract: The invention discloses an aquaculture water area dissolved oxygen control method based on microclimate. The method comprises the following steps of: setting an initial value of dissolved oxygen concentration; detecting dissolved oxygen of an aquaculture water area in real time; when the dissolved oxygen concentration is less than the initial value, adding oxygen to the aquaculture water area; detecting an air speed in real time; setting an air speed threshold; when the air speed exceeds the threshold and the dissolved oxygen concentration is less than a corrected value, adding oxygen to the aquaculture water area until the dissolved oxygen concentration reaches the corrected value, wherein the ratio between the corrected value and the initial value is 1.1-1.5; the invention further discloses an aquaculture water area dissolved oxygen control device based on the microclimate; the device comprises sensor equipment, a data processing module and an aerator; and the method disclosed by the invention provides an effective and reliable way for uniformly controlling the dissolved oxygen in aquaculture; and the device disclosed by the invention has the advantage of strong environmental suitability and can be used for simply, conveniently accurately and effectively controlling the content of the dissolved oxygen in water.

Plant canopy information spectrum detection method based on background removal

Abstract: The invention discloses a plant canopy information spectrum detection method based on background removal. The method comprises the following steps of (1) using a near-infrared broad band pass filter with a wavelength coverage of 780-950nm and a red light optical filter in a wavelength of 650nm to obtain reflectivity of near-infrared light and red light of a plant to be measured under sunlight radiation with same light intensity; (2) obtaining a correction factor according to a formula, wherein K is the correction factor, R1 is the reflectivity of the near-infrared light, and RR is the reflectivity of the red light; (3) obtaining an actual detection value of the plant to be measured through a plant canopy information spectrum detection device; and (4) obtaining a corrected detection value according to a formula of Ys=KYv, wherein the Ys is the corrected detection value, and the Yv is the actual detection value. With the adoption of the plant canopy information spectrum detection method, detection accuracy is greatly improved; and the plant canopy information spectrum detection method is simple and convenient to operate and easy to achieve.

Shortest neighbor node path energy-saving communication method for agricultural Internet of things

Abstract: The invention discloses a shortest neighbor node path energy-saving communication method for agricultural Internet of things. The method comprises the following steps of: generating a node communication path diagram according to the geographical positions of nodes, determining neighbor nodes closest to a current node by using a coordinate calibration method in the node communication path diagram, traversing all the nodes, and establishing a shortest neighbor node path communication diagram, wherein all the nodes support a sleep mode; when the current node transmits information to the neighbor nodes, only awakening the neighbor nodes closest to the current node according to the shortest neighbor node path communication diagram, establishing links between the awakened neighbor nodes and the current node, receiving the information from the current node by using the neighbor nodes, and keeping the other neighbor nodes in the sleep mode. After being started, equipment of the agricultural Internet of things can be continuously, quickly and intelligently networked; the method is high in networking efficiency and low in power consumption; and a long-distance transmission function is realized.

Active induction type depth routing networking method of internet of things of agriculture

Abstract: The invention discloses an active induction type depth routing networking method of internet of things of agriculture. The active induction type depth routing networking method of the internet of things of the agriculture includes a node communication path diagram is generated according to node geographical positions, an adjacent shortest path communication diagram and a maximum lateral path communication diagram are established in the node communication path diagram, an upper computer presets routing series information and precedence information for each node, and the set information is fed back to each node. When routing series is not greater than 6-level, an information forward request is sent to corresponding adjacent nodes according to the adjacent shortest path communication diagram; when the routing series is greater than 6-level, the information forward request is sent to corresponding adjacent nodes according to the maximum lateral path communication diagram; when a front node sends information to adjacent nodes, only the corresponding adjacent nodes are woken up and establish connection with the front node to receive information, the remaining adjacent nodes are still in sleep state. Network quality is improved remarkably after depth routing processing.

Method and system for growth status determination of a plant

Abstract: The present invention relates to a method for determining a growth status of a plant comprising chlorophyll, the method comprising the steps of: illuminating the plant (102) with input light including a light intensity modulation component (205, 206, 207, 208); detecting light emitted from the plant; determining (S702) an offset light intensity (204) surrounding the plant, the offset light intensity being a static component of the input light; determining (S718) a phase and a gain between the input light and the detected light, determining (S720) a growth status of the plant based on a predetermined relationship between input light and detected light, and on the phase and the gain The invention also relates to a corresponding system and to a computer program product

Automatic feeding system based on internet of things technology for high-density fishpond culture

Abstract: The invention relates to an automatic feeding system based on the internet of things technology for high-density fishpond culture, and belongs to the field of high-density aquatic product culture Thesystem comprises an oxygen content detection device, a water temperature detection device, a monitoring platform and an automatic feeding machine The monitoring platform comprises a water quality oxygen dissolution detection unit, and the water quality oxygen dissolution data is obtained according to the detection data of the oxygen content detection device and the water temperature detection device; a feeding control unit sends feeding control instruction to the automatic feeding machine according to the water quality oxygen dissolution data; a high-density fishpond comprises a circulatingculture sub-fishpond, a purification sub-fishpond, a sewage collection tank and a sewage filtering tank; the circulating culture sub-fishpond comprises a plurality of culture sub-tanks; each culture sub-tank is provided with a separate layer water injection structure for introducing water from a part above the water surface and an underwater part of the culture sub-tank; and water of the circulating culture sub-fishpond flows to the purification sub-fishpond sequentially from the sewage collection tank and the sewage filtering tank, and the purified water is injected into the circulating culture fishpond through the separate layer water injection structure According to the invention, the remote intelligent material feeding management and control are realized by the internet of things technology

Automatic monitoring system and method for dissolved oxygen in recirculating aquaculture

Abstract: The invention relates to an automatic monitoring system and an automatic monitoring method for dissolved oxygen in recirculating aquaculture. The automatic monitoring system comprises a dissolved oxygen probe, a temperature probe, a basic oxygen supply unit and an emergency oxygen supply unit which are arranged in a culture pond, wherein the dissolved oxygen probe and the temperature probe are connected with a data reading unit, the data reading unit is connected with a PLC and transmits acquired data to the PLC via an Modbus protocol, the PLC is connected with an upper computer server and uploads the received acquisition data to the upper computer server, the PLC is connected with an electromagnetic valve, and the electromagnetic valve is connected with the emergency oxygen supply unit. The automatic monitoring method comprises the steps of: (1) starting the automatic monitoring system; (2) setting the PLC; (3) comparing and controlling an acquisition value and a set value of the PLC in real time; and (4) uploading data of the PLC. The automatic monitoring system and the automatic monitoring method are affordable, ensure that the dissolved oxygen fluctuates within a set range, send out alarm when an abnormity occurs, and improve the operation reliability of the system.

Device and method for measuring chemical and physical parameters of water for aquaculture

Abstract: The present invention provides a device and method for measuring chemical and physical parameters of the water for aquaculture The present device comprises a power management module (1); a water quality monitoring module (2) for monitoring, detecting, processing and recording the chemical and physical parameter(s) of the water; a data transmission module (3) for transmitting recorded the chemical and physical parameter (s) wirelessly to a user using a communicating means; a controller module (4) for controlling aerators (7) and auto feeders (8) on receiving the chemical and physical parameter(s) from the data transmission module (3). The present invention provides real time monitoring and sends an alert signal to the farmers if water quality drops/increases so that farmers can take immediate preventive action to save the fishes/shrimps/prawn.

Spectral calibration method for crop nitrogen sensor

Abstract: The invention provides a spectral calibration method for a crop nitrogen sensor. The method is characterized by comprising the following steps: 1) respectively calibrating the irradiance of an up light sensor and the radiance of a down light sensor by using a standard detector, i.e., in virtue of the up light sensor and the standard detector, synchronously measuring the irradiance of the waveband r of sun light and fitting a linear relation between the output DN_Up(r) of the up light sensor and the output EB(r) of the standard detector so as to realize calibration of the optical radiance of the up light sensor as shown in a formula (3) which is described in the specification; etc. The up light sensor is in good linear relation with the irradiance of sun light, the down light sensor is in good linear relation with the radiance, and linear relativity reaches 99%. The calibration method based on radiation can greatly improve measurement precision and stability of the crop nitrogen sensor compared with a calibration method based on a standard gray scale plate.