50results about How to "Accurate temperature change" patented technology

An induction heating cooker includes a surface, a heating coil for inductionally-heating a load pan, an inverter for supplying a high-frequency current to the heating coil, an infrared detector which detects infrared radiation emitted from the load pan and is located under a top plate, a first temperature detector for detecting a temperature of the load pan based on an output of the infrared detector, a heating controller for controlling a power output from the inverter, a thermo-sensitive element for receiving heat from the top plate, and a second temperature detector for detecting a temperature of the load pan based on an output of the first thermo-sensitive element. This induction heating cooker detects a temperature change of the load pan accurately by detecting an infrared radiation from the load pan, and detects the temperature of the load pan by the heat conduction from the pan even if ambient light enters.

A temperature detection circuit and method are provided. The temperature detection circuit samples a first delay time for an input signal at a target temperature to be detected, stores a first addresses generated as the sampled result, samples a second delay time for the input address at a present operating temperature, compares a second addresses generated as the sampled result with the first addresses, and generates a detection signal if the target temperature to be detected is the same as the present operating temperature. The temperature detection method is performed by the temperature detection circuit.

A concentration determination apparatus may determine a concentration of a target component in an arbitrary layer of an observed object including a plurality of light scattering medium layers. The concentration determination apparatus may include an irradiation unit, light scattering medium layer selection unit, a light receiving unit, a light intensity acquisition unit, an optical absorption coefficient calculation unit, and a concentration calculation unit.

Provided is a natural convection-driven polymerase chain reaction (PCR) apparatus and method, which can periodically change temperature of a sample to make a natural convection-driven flow in a loop-shaped channel on a disposable polymer chip and contacting heating metal members maintained at different temperatures with channels. The natural convection-driven PCR apparatus includes: a polymer chip having a plurality of channels connected together to form a loop-shaped microchannel, a sample being filled inside the channels; a plurality of heating metal members contacting the loop-shaped microchannel of the polymer chip and transferring heat; a temperature controller connected to the heating metal members to maintain the heating metal members at different temperatures; a plurality of heaters connected to the heating metal members and the temperature controller to supply heat to the heating metal members; and temperature sensors connected to the heating metal members and the temperature controller.

Provided is a natural convection-driven polymerase chain reaction (PCR) apparatus and method, which can periodically change temperature of a sample to make a natural convection-driven flow in a loop-shaped channel on a disposable polymer chip and contacting heating metal members maintained at different temperatures with channels. The natural convection-driven PCR apparatus includes: a polymer chip having a plurality of channels connected together to form a loop-shaped microchannel, a sample being filled inside the channels; a plurality of heating metal members contacting the loop-shaped microchannel of the polymer chip and transferring heat; a temperature controller connected to the heating metal members to maintain the heating metal members at different temperatures; a plurality of heaters connected to the heating metal members and the temperature controller to supply heat to the heating metal members; and temperature sensors connected to the heating metal members and the temperature controller.

A system and method for measuring a junction temperature of a power module junction temperature are provided. The method is capable of improving accuracy of temperature measurement by more accurately applying temperature change in a junction temperature rising section, capable of more accurately predicting durability life of a power module, and capable of increasing output power of the power module.

A method for reducing errors in the measurement of temperature by magnetic resonance, for use in magnetic resonance imaging-guided HIFU equipment, includes acquiring an MR phase image, as a reference image, before heating an area to be heated with the HIFU equipment; acquiring another MR phase image, as a heated image, during or after the heating by the HIFU equipment; and calculating the temperature change in the heated area according to said heated image and said reference image; and making compensation to said temperature change according to the change in the magnetic field caused by the position change of an ultrasonic transducer in said HIFU equipment. The method can reduce significantly the temperature errors resulting from the position changes of the ultrasonic transducer.

The invention discloses an electricity-gas comprehensive energy system unified energy flow calculation method considering natural gas thermodynamic process. The method mainly comprises the following steps: 1) establishing an equipment model considering a natural gas system thermodynamic process; wherein the equipment model comprises a natural gas pipeline model and a compressor model. 2) based onthe equipment model, establishing electricity-; the invention discloses a unified energy flow solving model of a gas comprehensive energy system. The unified energy flow solving model of the electricity-gas comprehensive energy system comprises a natural gas system model, a power system model and a coupling element model. And 3) calculating the energy flow of the electric-gas integrated energy system to be detected by using the unified energy flow solving model of the electric-gas integrated energy system. The method can reflect the temperature change condition of the natural gas caused by thethermodynamic process and the influence of the temperature change condition on other state variables in the system more accurately.

A method for reducing errors in the measurement of temperature by magnetic resonance, for use in magnetic resonance imaging-guided HIFU equipment, includes acquiring an MR phase image, as a reference image, before heating an area to be heated with the HIFU equipment; acquiring another MR phase image, as a heated image, during or after the heating by the HIFU equipment; and calculating the temperature change in the heated area according to said heated image and said reference image; and making compensation to said temperature change according to the change in the magnetic field caused by the position change of an ultrasonic transducer in said HIFU equipment. The method can reduce significantly the temperature errors resulting from the position changes of the ultrasonic transducer.

A temperature of a portion of which the temperature is difficult to directly measure is accurately estimated in a simple method.In S1, information about a coolant discharging / stopping state is obtained. As the information about the coolant discharging / stopping state, a flag is used such that the flag represents 1 for the discharging state and the flag represents 0 for the stopping state. Next, in S2, temperature data is obtained from temperature sensors provided in components of a machine tool, a machining space, and a coolant tank. Next, in S3, lag process is performed for the coolant discharging / stopping state flag, and coefficients for measured temperatures of the coolant and the structure are calculated. Next, in S4, the measured temperatures are multiplied by the coefficients, and an estimated temperature of a portion to which the temperature sensor is not attached is calculated.

The invention discloses a CMOS process integrated temperature sensor for a TEC-free infrared imaging system, which includes a temperature detection circuit, a bias circuit and an output stage drive circuit; Basically irrelevant constant current and common grid bias voltage; the temperature detection circuit includes a current mirror composed of four PMOS transistors and a temperature detection core circuit composed of two triodes, and the triodes are connected into a diode form through the temperature detection circuit. The diode temperature characteristic obtains a negative temperature coefficient voltage. The output stage drive circuit includes four PMOS transistors and two NMOS transistors, the two PMOS transistors are cascode current mirrors, the other two NMOS transistors are input pair transistors, and the two NMOS transistors are load transistors, through the output stage drive circuit output the signal voltage. The circuit implementation complexity of the method proposed by the invention is low, and has high practical application value.

The invention provides a test system and method for a turbine blade integrated thin film temperature sensor, which solves the problem that the existing turbine blade integrated thin film temperature sensor cannot adopt an industrial thermocouple temperature measurement calibration mode. The system comprises a heating box, an instantaneous heating unit, an imaging unit, a standard thermocouple, a check meter and a control unit, wherein the instantaneous heating unit comprises a laser, a condensation unit and a rotary table; the condensation unit is located outside the observation opening in the side wall of the heating box and on an emergent light path of the laser; the condensation unit is arranged on the rotary table; the imaging unit is arranged outside the observation opening of the heating box; the number of the standard thermocouples is equal to that of the thin film temperature sensors on the turbine blade to be measured, and the positions are in one-to-one correspondence; the thin film temperature sensor and the standard thermocouple are respectively connected with the check meter; the control unit controls the emergent energy of the laser and is connected with the rotary table; and the control unit compares the temperatures obtained by the thin film temperature sensor and the standard thermocouple, and judges whether the performance of the thin film temperature sensor is qualified or not.

A hot runner nozzle structure includes a tubular nozzle and at least one temperature measurement component. The tubular nozzle has an outer wall surface and an inner wall surface defining a flow channel. The tubular nozzle has portions defining at least one thru-hole interconnected the outer wall surface and the inner wall surface. The temperature measurement component has a base and a sensor connected to the base. The base is fixed in the thru-hole. The sensor has a tip protruding beyond the inner wall surface and exposed in the flow channel.

A concentration determination apparatus may determine a concentration of a target component in an arbitrary layer of an observed object including a plurality of light scattering medium layers. The concentration determination apparatus may include an irradiation unit, light scattering medium layer selection unit, a light receiving unit, a light intensity acquisition unit, an optical absorption coefficient calculation unit, and a concentration calculation unit.

Prior to recording / reproducing information to / from an optical disk rotationally driven by a spindle motor, an optical pickup is moved to a plurality of measuring positions set beforehand in a radial direction of the optical disk. A relative tilt between the optical disk and the optical pickup is detected with the spindle motor being rotated so that a linear velocity at each of the measuring positions equals a linear velocity upon actually recording or reproducing the information thereat. The tilt detected at each of the measuring positions is stored as tilt detection data corresponding to each of the measuring positions.

A temperature of a portion of which the temperature is difficult to directly measure is accurately estimated in a simple method.In S1, information about a coolant discharging / stopping state is obtained. As the information about the coolant discharging / stopping state, a flag is used such that the flag represents 1 for the discharging state and the flag represents 0 for the stopping state. Next, in S2, temperature data is obtained from temperature sensors provided in components of a machine tool, a machining space, and a coolant tank. Next, in S3, lag process is performed for the coolant discharging / stopping state flag, and coefficients for measured temperatures of the coolant and the structure are calculated. Next, in S4, the measured temperatures are multiplied by the coefficients, and an estimated temperature of a portion to which the temperature sensor is not attached is calculated.

The present disclosure relates to an apparatus embodied in order to correct efficiently changing of measured temperature value in a temperature sensor according to influence of irradiance. A radiosonde related an exemplary embodiment of the present disclosure includes a first temperature sensor; a second temperature sensor having higher emission ratio than the first temperature sensor; and a measuring unit in order to calculate corrected temperature value, but the radiosonde and the third temperature sensor are installed in a chamber before flying of the radiosonde, a first temperature change detected by the first temperature sensor by output light in a sunlight simulator and a second temperature change detected by the second temperature sensor are induces, compensation factors may be derived using the first temperature change, the second temperature change, and temperature value measured by the third temperature sensor.

A hot runner nozzle structure includes a tubular nozzle and at least one temperature measurement component. The tubular nozzle has an outer wall surface and an inner wall surface defining a flow channel. The tubular nozzle has portions defining at least one thru-hole interconnected the outer wall surface and the inner wall surface. The temperature measurement component has a base and a sensor connected to the base. The base is fixed in the thru-hole. The sensor has a tip protruding beyond the inner wall surface and exposed in the flow channel.

The invention discloses a method for quickly detecting the temperature of a power device. The method comprises the steps of enabling a 0402 packaged temperature sensor to be welded on a flexible printed circuit (FPC), forming a very narrow groove in a radiator under a heat dissipation substrate of the power device, enabling the size of the flexible printed circuit to be equivalent to the size of the groove during the design of the flexible printed circuit, coating the flexible circuit board welded with the temperature sensor with heat conduction silicone grease and then extending into the groove, then covering the flexible circuit board with the ceramic chip with the two sides coated with the heat conduction silicone grease, and finally attaching the power device to the ceramic chip and locking through the elastic piece. The temperature change of the power device can be followed very quickly and accurately; strong and weak electricity isolation is realized between the temperature sensor and high voltage; the thermal resistance between the heat dissipation substrate of the power device and the radiator is not influenced; and the method is low in cost, convenient to install and rapidand accurate in detection.

Embodiments relate to a semiconductor integrated circuit and a temperature drift compensation method for the semiconductor integrated circuit. The semiconductor integrated circuit includes: a bandgap reference circuit configured to generate a reference voltage VREF; a temperature drift compensation circuit coupled to the bandgap reference circuit and configured to compensate for a temperature drift of the reference voltage VREF based on the digital control logic; a micro-current source circuit coupled to the bandgap reference circuit and configured to generate a micro-current IOUT1 based on a reference voltage VREF; and a current amplification and test circuit coupled to the micro-current source circuit and including an operational amplifier U3, a resistor R9, a resistor R10, a heating power triode Q4, and a switch K1, a switch K2 and a switch K3, the current amplification and test circuit being configured to generate a current IIN flowing through the heating power triode Q4 based on the micro-current IOUT1 when the switch K1, the switch K2 and the switch K3 are turned on, thus, the heating power triode Q4 is heated, and the temperature of the environment where the band-gap reference circuit is located is changed.

The invention relates to the field of semiconductor circuit packaging detection, and discloses a via hole welding spot tin penetration depth detection device and method based on infrared thermal imaging, and the device comprises an excitation source unit, a control system, an infrared imager, and a tested piece. A plurality of via hole welding spots are distributed on the surface of the tested piece, the infrared imager and the excitation source unit are located on the two sides of the tested piece respectively, and the excitation source unit is used for heating the surface of the tested piece; a camera of the infrared imager is aligned with a plurality of via hole welding spots on the surface of the tested piece; the control end of the control system is respectively connected with the control ends of the infrared imager and the excitation source unit, the excitation source unit can quickly heat the surface of the test piece to be tested, the infrared imager can capture and record the temperature change in real time, and the captured image is fed back to the control system; and the tin penetration depth of the via hole welding spot is obtained through processing of the control system, so that the detection efficiency of the tin penetration depth of the via hole welding spot is effectively improved.

The invention relates to the technical field of temperature measurement, in particular to a hardness plug temperature measurement method. The method comprises the following steps: 1) preparing a hardness plug; 2) drilling a hole in the surface of a disc-shaped to-be-measured object; 3) installing the hardness plug into a drill hole of the to-be-measured object; 4) performing a simulation experiment on the to-be-measured object, taking out the hardness plug after the experiment is completed, and measuring the hardness of the hardness plug to obtain the temperature distribution of the to-be-measured object during working, wherein the surface drill holes of the to-be-measured object are divided into surface groups and internal groups, the surface drill holes are drill holes extending into theto-be-measured object along the axial direction of the to-be-measured object, and the depths of the adjacent surface drill holes are the same; the internal drill holes extend into the to-be-measuredobject along the axial direction of the to-be-measured object, and the depths of the adjacent internal drill holes are different. The measuring method is extremely simple, can reflect the temperaturedistribution condition inside the to-be-measured object and the temperature distribution condition of the working surface more accurately compared with the prior art, is more accurate in measuring mode, and has great popularization value.

The invention belongs to the processor design field, and relates to a method capable of preventing overheat of one or several cores of a processor by thread transfer distribution among the cores of the processor. The multiple processor cores in the multi-core processor are divided into multiple groups, and the multiple adjacent processor cores share the memory to form a group. Each group has a thread controller which dynamically transfers and distributes the thread to the processor cores in the group to make the temperature of the over-heat processor core become lower than a preset threshold and most close to the preset threshold with the minimum thread transfer number, and transfers the thread to the processor core with the minimum adjacent processor core number in operation so as to reduce the probability of the occurrence of the over-heat processor core in the future, the thread transfer of the multiple groups can be carried out simultaneously, so the temperature of the over-heat processor core in each group can be reduced to a temperature value which is lower than the preset threshold rapidly.

The invention discloses an intelligent adjustable self-heating inoculator for microbial experiments. The inoculator comprises a head inoculating loop, a sliding rod and a handle which are connected in sequence, wherein the head inoculating loop comprises an inoculating needle and two spliced inoculating loops; the inoculating needle is mounted at the top of the sliding rod; a sliding block track and two sliding blocks are arranged in the sliding rod; the bottoms of the spliced inoculating loops are connected with the sliding blocks; a gear shifting mechanism comprises a push button, a guide rail sliding block and two connecting rods; the guide rail sliding block is arranged at the handle; the push button is assembled on the guide rail sliding block in a sliding manner; the handle comprises a constant-temperature heating device and a temperature controller which are connected with a battery through wires; the constant-temperature heating device is used for heating and adjusting the temperature of the head inoculating loop; and the temperature controller electrically connected with the constant-temperature heating device is used for monitoring the environment temperature and the overall temperature of the head inoculating loop. The inoculator is simple to operate and low in cost, and can meet the requirements of various microbial experiments.

A system and method for measuring a junction temperature of a power module junction temperature are provided. The method is capable of improving accuracy of temperature measurement by more accurately applying temperature change in a junction temperature rising section, capable of more accurately predicting durability life of a power module, and capable of increasing output power of the power module.

A visible-light-image physiological monitoring system with thermal detecting assistance is disclosed. The system takes a visible-light image and a thermal image of a body at the same time. A processing unit identifies a body feature of the visible-light image and determines a coordinate of the feature. In a learning mode, an initial temperature of the body feature is determined from the thermal image according to the coordinate of the body feature. After then, a physiological status monitoring mode is executed to monitor the temperature changes of the body feature and output an alarm when the temperature is determined to be abnormal. Therefore, a monitoring accuracy of the visible-light-image physiological monitoring system is increased and avoids transmitting false alarms or no alarms.

The present invention provides a system and method of predicting the initial cooling of a superconducting magnet, which can predict the change in initial cooling temperature of a superconducting magnet when the superconducting magnet is cooled using an ultra-low refrigerator. In the system and method, the change in cooling temperature of a superconducting magnet can be accurately predicted by classifying influence factors related to the cooling of a superconducting magnet into a plurality of control volumes and inducing a governing equation with respect to each of the control volumes. Based on this system and method, the reliability of basic data required to design an apparatus for measuring a high magnetic field for forming an ultralow-temperature environment can be greatly improved.

The invention discloses a device and method for detecting the integrity of cast-in-place piles based on densely distributed optical fiber grating temperature sensing technology. A metal material with a large thermal expansion coefficient is used as a temperature-sensitizing element, and the temperature-sensitizing element is hoop-bonded on an optical fiber. Where there is no protective layer, the optical fiber is fixedly bound on the main reinforcement of the steel cage; after the steel cage is lowered, the optical fiber is first connected to the dense distributed temperature interrogator; the concrete is poured and the quality and amount of the concrete are recorded; according to the amount of concrete and the The quality determines the monitoring time of the pile body temperature; the intensive distributed temperature demodulator starts collecting temperature data immediately after the concrete pouring of the pile body is completed; according to the collected temperature data, the difference of the concrete hydration heat along the pile body is obtained to judge whether the concrete pouring Uniformity and the range of pile diameters further obtain the integrity of cast-in-place piles. The invention greatly improves the temperature measurement accuracy and positioning accuracy, does not need active heating, can detect pile foundation defects early and repair them in time.

The present invention discloses a pickled vegetables refrigerator. It includes the following several portions: external box formed into appearance of refrigerator; internal box placed in the interior of external box for storing various foods; refrigerant tube which is coiled on the external side surface of internal box and whose interior can allow the refrigerant to flow and make heat exchange; cooling unit formed from cooling sensor for detecting internal box coaling temperature; and heating unit which is coiled and set on lower side of cooling unit, in the heating unit interior are set a heater capable of releasing a certain heat quantity to raise internal box temperature and a heating sensor for detecting internal box temperature.