45results about How to "Accurate heating control" patented technology

An electric arc welder operated to perform a short circuit process with a first waveform controlling a short condition followed by a second waveform controlling an arc condition, wherein the welder includes a comparator to create an arc signal when the short condition terminates and a controller shifting the welder from control by the first waveform to control by the second waveform in response to creation of the arc signal.

The invention provides a method for producing rosin by turpentine, which comprises the following steps of melting, clarifying and distilling. The melted turpentine liquid is pressed in at least two higher-placed furnaces by vapor pressure in the melting process. The subsequent clarifying process is performed after the melted turpentine liquid is stayed in the higher-placed furnaces. The rosin product obtained by the method of the present invention can reach the grade of national superfine standard.

The invention discloses a barrel temperature control method of an injection molding machine. The method comprises the following steps: S1, a fuzzy value E of temperature deviation between measured temperature and target temperature in a current sampling period k and a fuzzy value EC of temperature deviation variation rate between the measured temperature in the current sampling period and measured temperature in the last sampling period are calculated; S2, PID fuzzy reasoning operation of the current sampling period is carried out, and fuzzy rule of the current sampling period during the operation is corrected; S3, PID controlled quantities of the current sampling period are calculated, and current heating control is carried out according to the controlled quantities of the current sampling period; and S4, the Steps S1 to S3 are repeated successively in the next sampling period (k+1). The fuzzy rule is corrected continuously by the method, and three quantities of PID are obtained according to the corrected fuzzy rule. Control precision can be raised, temperature overshoot can be effectively reduced, and time spend in heating to a specified temperature can be shortened.

The invention relates to the field of power battery heating control and aims to provide a power battery heating method based on self-adaption. According to the adopted technical scheme, the power battery heating method based on self-adaption comprises the following steps of signal collecting treatment, judgment of heating modes, heating control and heating stopping judgment. According to the powerbattery heating method based on self-adaption, accurate heating control over a power battery is achieved, the targeted heating modes can be automatically selected according to the actual temperatureof the power battery, and the heating effect is better.

An optical fiber reinforcement processing apparatus and reinforcement processing method are provided where it is not necessary to dispose a temperature detecting device such as a thermistor, and a heating control in which the detected temperature is not varied, the power consumption is low, and which is accurate is enabled.

An optical fiber reinforcement processing apparatus in which a fusion-spliced portion of an optical fiber is covered by a heat-shrinkable reinforcing sleeve to perform reinforcement has: heating controlling means for performing a heating control on a heater which heats the reinforcing sleeve; and temperature detecting means for detecting a heating temperature of the heater on the basis of a change of the resistance of the heater. The heating control and the temperature detection are performed by controlling time periods of turning on/off a power supply to the heater. The temperature detection is performed by detecting a voltage change Eo of the midpoint of a bridge circuit in which a series circuit of a first fixed resistor R1 and a heater resistor RX, and a series circuit of a second fixed resistor R2 and a third fixed resistor R3 are connected in parallel.

The invention discloses a water heater and an anti-dry-heating control method of the water heater. The water heater comprises a water tank, a temperature-detecting device, a heating device and a controller, wherein the water tank is used for storing water; the temperature-detecting device is arranged in the water tank to detect the temperature in the water tank; the heating device is arranged on the water tank to heat water in the water tank; the controller is connected with the temperature-detecting device and the heating device to control the heating device to be switched on or off according to a temperature-detecting value which is detected by the temperature-detecting device. According to the water heater disclosed by the invention, not only is the structure simple, but also the heating of the water tank is more accurately controlled, so that the use of a user is more facilitated.

The invention provides a heating control method of a microwave oven. Infrared sensors used for detecting the temperatures at different positions are arranged in the microwave oven. The heating controlmethod of the microwave oven comprises the steps that food is heated at a first preset power, and the positional area of the food in the microwave oven is determined according to the temperature riserates, detected by the sensors, at different positions; an environmental compensation temperature is determined according to the positional area of the food, and an acquired temperature of the food is compensated for according to the environmental compensation temperature, so that a compensated food temperature is obtained; and heating control is conducted on the food according to the compensatedfood temperature. According to the heating control method of the microwave oven, the positional area of the food can be effectively determined according to the temperature rise rate in the food heating process, and temperature compensation of the food is calculated according to the positional area, so that a more accurate food temperature is obtained, and more accurate heating control of the foodis facilitated.

The invention relates to a high-precision and sensitive-response water level detection and heating control system, a water level detection and heating control method and an electric kettle. The waterlevel detection and heating control system comprises a heating device for heating water, a temperature detection device for detecting the temperature of the heating device and generating a temperaturesignal, and an MCU controller for controlling the heating device to heat. The MCU controller receives the temperature signal of the temperature detection device and generates a test temperature curve; and the MCU controller controls the heating device to heat according to the test temperature curve. According to the water level detection and heating control method of an electric kettle, whether the water amount in the kettle is lower than the water amount of the lowest water level or not is judged by testing the temperature curve of the heating device during heating, so that accurate controlover heating of the heating device is realized; the electric kettle is prevented from continuing to heat under the condition that the water amount is too small or too low, so that damages to the electric kettle are avoided, the service life of the electric kettle is prolonged, and accidents are reduced.

The invention discloses a reaction kettle which comprises a kettle body, wherein a material inlet is formed in the top of the kettle body; a material outlet is formed in the bottom of the kettle body; the kettle body comprises an inner layer and an outer layer; a heat preservation layer is arranged at the outer side of the outer layer; a temperature detection device is arranged at the lower side wall of the kettle body; a bearing in the top of the kettle body is in tight connection with a stirring shaft; a motor and a speed reducing machine are arranged above the stirring shaft; the stirring shaft positioned at the lower part of the kettle body is connected with a stirring device blew the stirring shaft. The reaction kettle can be used for improving the heat exchange efficiency, and the heating temperature is easy to control; the whole kettle body is heated, so that liquid materials can be uniformly heated; the stirring effect is good, and the flowing directions of the materials are changed in a stirring process, so that the reaction of the materials is relatively full; an air valve is adopted for controlling the output of gas generated in a reaction process; parameters such as the temperature, air pressure and stirring speed can be controlled; a temperature sensor in a feeding device can effectively sense the temperature of the materials.

The invention provides a preparation method of rare earth doped LiNi0.5 Mn1.5O4 as an anode material for a super capacitor. The preparation method comprises the following steps of: respectively taking compounds of Ni, Mn and Li according to the mole ratio that Ni to Mn to Li to rare earth is 1:3.0:(2.05-2.24):(0.003-0.02), adding the compounds of Ni, Mn and Li in a reaction pot and adding pure water to obtain a mixed solution A; based on a target product, respectively taking 6-30% of citric acid, 300-600% of pure water and 0.002-0.01% of dispersing agent, adding the citric acid and the dispersing agent to the pure water, and uniformly stirring; and then adding the rare earth to the aqueous solution of citric acid to obtain a solution B; adding the solution B to the solution A to obtain a solution C; adjusting the pH value of the solution C to 5-7, heating the solution C in a water bath manner to obtain a precursor; and putting the precursor in a metal container and carrying out microwave baking on the precursor to obtain the target product. According to the invention, the conductivity of LiNi0.5 Mn1.5O4 and the energy density of the super capacitor are improved greatly, the preparation process is simplified by adopting a microwave treatment technology, and thus the preparation method is easy for industrial implementation.

The invention discloses a single-pump conduction oil heating system. The single-pump conduction oil heating system comprises a hot oil pump, more than one heating element and a control unit, wherein the heating elements are arranged in a heat insulation box; heat insulation cotton is filled in the gaps between the heating elements and the heat insulation box; each heating element comprises an oil storage cavity, an anti-explosion box, a heat insulating layer, a temperature tube, more than one heating tube and more than one guide plate. The single-pump conduction oil heating system has a simple structure, is accurate in heating control, has high efficiency of the heating mode and good temperature uniformity of the heating effects, is energy-saving and environment-friendly and reduces the production cost.

The invention discloses a rapid cooling device and a temperature control method thereof. The device comprises a heating unit, a temperature detection unit, a control computer, an analog output unit, a pulse control and modulation module and a switch unit. By using a pulse width modulation method, the existing electric heating adjuster is replaced by the pulse control and modulation module which is integrated with a power supplier, a waveform conversion circuit and a comparator, the total volume of a system is reduced, group control is not required, the noise and interference are reduced, the heating of a chamber can be controlled more accurately, and the process quality of various rapidly heated targets such as wafers, solar cells, photoelectric chips and the like can be promoted.

The invention discloses a cooking device, a heating control method of the cooking device, a control terminal and a computer storage medium. The heating control method of the cooking device comprises the following steps: during the process that the cooking device heats food, guiding an exciting light source emitted by an exciting source to a fluorescent material layer through a first light guide element; receiving fluorescence returned by the fluorescent material layer, and converting the fluorescence into the real-time temperature of food; and judging that whether the real-time temperature achieves a preset value or not, if the real-time temperature achieves the preset value, stopping the heating of the cooking device for food. According to the technical scheme, during the process of heating food, the exciting light source of the exciting source is transmitted to the fluorescent material layer through the first light guide element, then the fluorescence returned by the fluorescent material layer is received, and the temperature of food is calculated through the attenuation characteristic of fluorescence; the attenuation of fluorescence is related to the temperature, but is not related to the intrinsic nature of food, thus the detected temperature of food is more accurate, and the heating of the cooking device is accurately controlled.

The invention discloses an asynchronous double-frequency induction heating numerical simulation method based on specially-shaped inductors, and belongs to the technical field of asynchronous double-frequency induction heating. The method is based on ANSYS finite element numerical simulation software, medium-frequency and high-frequency inductors in different shapes are used for heating a chain wheel, and the nonuniformity of asynchronous double-frequency induction heating temperature distribution of the chain wheel is reduced; asynchronous double-frequency heating simulation of the chain wheel under the specially-shaped inductors is realized with a unit birth-death method, and the calculation time is shortened in a modeling mode that overlapped parts among sub-models are still kept independent from one another; switching of medium-frequency and high-frequency induction heating working conditions is achieved under the same model, the tooth profile temperature difference is used as the basis of medium-frequency and high-frequency heating switching, a traditional simulation method based on heating time is abandoned, more accurate heating control directly based on a targeted target is achieved, the precision and efficiency of medium-high frequency switching control are greatly improved, and simulation is closer to real production.