31 results about "Global temperature" patented technology

A temperature controlled multi-channel transmitter optical subassembly (TOSA) may be used in a multi-channel optical transceiver. The temperature controlled multi-channel TOSA generally includes an array of lasers optically coupled to an optical multiplexer, such as an arrayed waveguide grating (AWG), to combine multiple optical signals at different channel wavelengths. The lasers may be thermally tuned to the channel wavelengths by establishing a global temperature for the array of lasers and separately raising local temperatures of individual lasers in response to monitored wavelengths associated with the lasers. A temperature control device, such as a TEC cooler coupled to the laser array, may provide the global temperature and individual heaters, such as resistors adjacent respective lasers, may provide the local temperatures. The optical transceiver may be used in a wavelength division multiplexed (WDM) optical system, for example, in an optical line terminal (OLT) in a WDM passive optical network (PON).

The invention discloses a device and method for detecting an operation state of an ultra-high-voltage transformer in a transformer substation based on a 3D infrared panoramic image, and aims to solve the problem that only parts of infrared thermal images of the transformer can be simultaneously obtained and a global temperature distribution thermal image of the transformer cannot be obtained when the operation state of the ultra-high-voltage transformer is detected traditionally. The device comprises a circular orbit paved around the transformer; the central axis of the transformer passes through the circle centre of the circular orbit; an intelligent controllable trolley is arranged on the circular orbit; a camera is arranged on the intelligent controllable trolley through a bracket; the camera comprises an infrared camera and a visible light camera; a panoramic fused image is formed by utilizing an image fusion technology; 3D left and right eye images are generated; recoding is carried out; and finally, the image is output onto a touch monitoring screen. According to the invention, the real-time operation state of the transformer can be reflected vividly; the operation state of the transformer can be observed without a dead angle from different angles; and operation faults can be judged in time.

Statistical timing analysis methods for circuits are described which compensate for circuit elements having correlated timing delays with a high degree of computational efficiency. An extended canonical timing model is used to represent each delay element along a circuit path, wherein the model bears information regarding any correlations that each element has to any other elements in the circuit (and/or to any external global factors, e.g., global temperature variations over the circuit, etc.). The model can be represented in a vectorized format which allows enhancement of computational efficiency, wherein the coefficients of the vectors allow an objective measure of element correlation (and wherein the vectors can be “pruned” by dropping insignificant coefficients to further enhance computational efficiency). A decomposition procedure can be used to decompose correlated elements into uncorrelated elements to allow delays to me more easily propagated through the timing diagram representing the circuit. Finally, a bounded approximation for the output of the MAX operator is described which provides a safely conservative approximation regardless of the linearity of the MAX output.

The invention discloses a distributed heat management device of a communication machine room. The device comprises an overhead floor, an air conditioning unit, an embedded heat pipe and an air return pipe, wherein an evaporation segment of the embedded heat pipe is mounted close to components generating large of heat inside a cabinet, and absorbs the heat which is then exported to the outside of the cabinet through a condensation segment; the air conditioning unit adopts downward air supply; and cold air absorbs heat exported by IT equipment and the heat pipe when flowing through the cabinet, then rises under air pressure and heat pressure, and returns to the air conditioning unit via an air return port to be cooled again; the far-end overhead floor is provided with a floor fan, thus ensuring effective heat dissipation of the IT equipment; and the starting of the floor fan is controlled through the backboard temperature of the IT equipment, and when a set temperature is exceeded, the floor fan is started. A recirculation fan adopts a frequency conversion technology, and adjusts rotation speed according to static pressure under the far-end fan, thus avoiding the impact resulting from lack of air in other cabinets when the floor fan is started. By adopting the distributed heat management device of the communication machine room, provided by the invention, the scheme of local and global temperature reduction of the communication machine room is further improved, and a worthy reference is provided for a communication machine room design.

The invention discloses a temperature prediction method based on a spatio-temporal condition autoregressive process, belonging to the technical field of industrial engineering. A spatio-temporal prediction model composed of global temperature change process and local temperature change process is established. The global temperature change is described by thermodynamic model, and the local temperature change is described by spatio-temporal transfer learning model, so that the engineering temperature system can be predicted comprehensively and accurately. The invention uses the existing temperature sensor data to predict the temperature system in a short time in the future, and can obtain the comprehensive and accurate information of the temperature system in a period of time in the future.It can solve the problem that the temperature system can not be accurately predicted due to the insufficiency of sensor data and partial missing of data in the engineering system.

The invention relates to an IDL-oriented projection transformation algorithm. Arctic region data of global temperature data of UTM projection is transformed into polar region normal projection. Longitude and latitude (hereinafter referred to as global longitude and latitude) of the global temperature data of the UTM projection, longitude and latitude (hereinafter referred to as arctic longitude and latitude) of an arctic region of the polar region normal projection, and the global temperature data are read by adopting an IDL; variables are defined for storing arctic temperature data after transformation; and a distance from each grid of the arctic longitude and latitude to each grid of the global longitude and latitude is calculated, the temperature data pointed by a global longitude and latitude index corresponding to a minimum distance is assigned to a variable grid pointed by an arctic longitude and latitude index, and all grids are circularly calculated in sequence to finally obtain arctic region temperature data of the polar region normal projection. According to the IDL-oriented projection conversion algorithm, a polar region part can be cut directly from data of global UTM projection and transformed into the polar region normal projection, so that the problem of difficulty in transforming original data of a global parameter into polar region data is solved.

The invention discloses a quantitative research method for an inner wall abrasion of a thick-wall cylinder. The method takes temperature and a contact pressure with maximum proportion in an interaction as an entry point, takes the root cause of a mechanical abrasion, i.e., a mechanical movement as a research object, and uses frictional heats generated thereby to contribute an incompletely cooled thick-wall cylinder heat transfer model, so as to obtain a global temperature distribution of the corrected inner wall of the thick-wall cylinder, and obtain a global ablative abrasion amount of the inner wall of the thick-wall cylinder through a degradation mathematical model of ablative abrasion materials; and the method takes the root cause of the ablative abrasion, i.e., temperature as a research object, and uses the heat softening and heat melting of the inner wall of the thick-wall cylinder inner wall generated thereby to update corresponding material characteristics of the inner wall ofthe thick-wall cylinder, so as to obtain a corrected global contact pressure distribution of the inner wall of the thick-wall cylinder, and obtain a global mechanical abrasion amount of the inner wallof the thick-wall cylinder through a degradation mathematical model of mechanical abrasion materials. According to the quantitative research method for the inner wall abrasion of the thick-wall cylinder, a global abrasion amount of the inner wall of the thick-wall cylinder can be obtained, and the degradation process of a thick-wall cylinder material can be quantitatively researched.

An motor comprising a rotor (10) and a stator (20), the rotor (10) comprising a rotor core (11) and a magnetic element (12) disposed on the rotor core (11), the stator (20) comprising a stator core (21) and a stator winding (22) disposed on the stator core (21), the motor is further provided with an additional winding (23), and the additional winding (23) is wound On the stator core (21), a changein electrical parameters of the additional winding (23) indicates an abnormal temperature of the motor. Since the additional winding is wound around the stator core, when the temperature change occurs anywhere in the motor, the additional winding can be monitored, thereby realizing global temperature monitoring of the motor interior and reducing the monitoring interface pressure. And equipment costs. In addition, it relates to a motor control system and an unmanned aerial vehicle using the motor, and a motor temperature measuring method applied to the motor.

Embodiments relate to a method including assigning a relative or absolute per output unit weighting factor using a mathematical formulas based on individual and/or total sample population carbon sourcing.

The invention relates to a global overtemperature monitoring and temperature control auxiliary system for a plate type heater. The system comprises an infrared global temperature measurement unit, an overtemperature control unit and a cooling unit; according to the infrared global temperature measurement unit, infrared camera shooting is adopted to carry out global temperature measurement on the heater; the overtemperature control unit identifies temperature acquisition data and carries out overtemperature alarm to realize auxiliary control of the operation of the heater; a cooling unit is connected to an original air source of a wind tunnel, and a blow-cooling ring and a blow-cooling nozzle achieve air flow on the surface of a heater shell and further achieve cooling of the heater shell. The infrared global temperature measurement unit comprises an infrared camera, a portal frame, a driver, a movable sliding rail and a real-time temperature detector, the portal frame is arranged on the movable sliding rail, and the portal frame is driven by the driver to slide along the movable sliding rail. According to the system of the invention, real-time temperature measurement can be carried out on the heater globally, so that safe use of the heater is ensured.

The invention discloses a power efficiency management system suitable for a big data center and a control method. The power efficiency management system comprises a temperature control pipeline, a temperature measurement system and a temperature control system; the temperature control pipeline is based on computational fluid mechanics, a finite element method and existing building design parameters; the temperature measurement system focuses on system optimization configuration, and relates to a global temperature conduction coefficient, a local temperature conduction coefficient, a temperature control equipment sensitivity table and an HVAC temperature element regulation capability quantification index; and the control mode of the temperature control system is layered, partitioned and graded control and is combined with predictive control and optimal control. Heat energy generated by the big data center is effectively dissipated in a mode of arranging a temperature control pipeline system, so that the energy consumption of an HVAC system is greatly reduced, the purposes of greenness and energy conservation are achieved, the singleness of a temperature control mode of a traditionalbig data center HVAC system is overcome, the temperature control efficiency is improved, and accurate control over the flow speed of a cooling medium and optimal control over uniform temperature distribution are effectively achieved.

The invention relates to a central air conditioner demand response scheme optimization method based on global temperature adjustment. The method comprises the following steps of 1) constructing demandresponse strategies of three types of central air conditioners, and giving a group of temperature adjustment value sequences of discretized execution time periods according to the temperature adjustment resolution of the central air conditioners; 2) for a temperature adjustment value delta TG of each discretized execution time period under each type of demand response strategy, obtaining a relational expression between the temperature adjustment value delta TG of the execution time period and the interactive power; 3) defining a user demand response net income index pi, and calculating a userdemand response net income index corresponding to the temperature adjustment value delta TG of each discretized execution time period under each type of demand response strategy; and 4) selecting anoptimal central air conditioner demand response scheme and an optimal temperature adjustment value according to the user demand response net income index. Compared with the prior art, the method has the advantages of being comprehensive and accurate, achieving net income maximization, understanding user behaviors and the like.

The embodiment of the invention provides a turntable calibration method, which comprises the following steps: global temperature calibration is carried out on chips to be calibrated on a turntable to obtain temperature compensation curves corresponding to the chips to be calibrated, each chip to be calibrated corresponds to one temperature compensation curve, and the global temperature calibration is carried out under all temperature conditions; local temperature calibration is carried out on a to-be-calibrated product on a rotary table, the local fixed deviation of the to-be-calibrated product is obtained, the local temperature calibration is carried out under preset temperature conditions, and the number of the preset temperature conditions is smaller than the number of all the temperature conditions. The corresponding chip to be calibrated is installed in the product to be calibrated; and on the basis of the temperature compensation curve and the local fixed deviation, each product to be calibrated is calibrated, and a calibration result of each product to be calibrated is obtained.

The invention discloses a paddy field transformation scheme. The paddy field transformation scheme comprises an aquatic product breeding region and a planting region, wherein the aquatic product breeding region is arranged in the low part of the planting region. On one hand, the structure can be used for breeding aquatic products and on the other hand, the structure can be used for planting crops. The structure can be used for controlling the problem of global temperature rise and lays a good foundation for future automatic agriculture to increase the income of farmers, and the structure can be further used for retaining water sources to reduce drought, so that natural drought is effectively controlled.

The invention discloses a boiler section two-dimensional temperature field reconstruction algorithm based on maximum radiation signal intensity monitoring. Three infrared temperature measurement sensors are arranged on each of a left wall and a rear wall of a boiler; the average temperature value and the maximum temperature value are recorded as Ta and Tm respectively; the highest temperature grid position of the global temperature field is positioned at the intersection position of i and k; the temperature value of the Tik is taken as a known value to be substituted into a solving equation set, then an ART algebraic iteration algorithm is used for temperature field reconstruction, and a reconstruction field 1 is formed; actually measured temperature values of all positioned infrared probes are taken as known values to be substituted into the solving equation set, then temperature field reconstruction is carried out by using an ART algorithm to obtain a reconstruction field 2, and the reconstruction field 2 is a final temperature field; the infrared probe can measure the average value and the maximum value of the current path temperature at the same time, temperature field reconstruction is carried out based on the improved ART reconstruction algorithm corrected by the maximum radiation signal, and the goodness of fit between the reconstructed temperature field and the actual temperature field is ensured.

The invention discloses a fluid-heat network modeling and bidirectional coupling method for an axial-radial mixed ventilation cooling motor, which is characterized in that the motor is a motor with an axial-radial mixed ventilation cooling structure, and the coupling method establishes a fluid network model and a heat network model separately so that the mutual influence between the temperature change and the fluid flow state is fully considered. Motor global temperature rise prediction is realized through bidirectional coupling of the fluid network model and the heat network model, so that the method has the advantage of short time required for predicting the temperature rise by a heat network method, and the motor temperature rise prediction precision can be improved; accordingly, accurate temperature rise prediction can be carried out on a motor with a complex ventilation structure, and a reference is provided for subsequent motor designers to carry out temperature rise prediction on a motor.