45results 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 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 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.

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.

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.

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.