The disclosure is directed to techniques for a thermostat to determine the air temperature of a room based on measurements of temperatures sensors located inside a housing of the thermostat. Because the thermostat for an evaporative cooler operates at line voltage and controls current flowing to the evaporative cooler, the magnitude of current flowing through the thermostat may vary from nearly zero, when the thermostat is in the powered-off state, to a current on the order of several amps. The variation in current causes a variation in temperature inside the housing of the thermostat. The techniques of this disclosure compensate for changes the internal housing temperature caused by changes in operating mode. The compensation allows the temperature sensors inside the thermostat housing to determine the air temperature of the room in which the thermostat is located, without regard for the operating mode of the evaporative cooler system.

A magnet temperature estimating device for a motor provided with a rotor having magnets and configured to output a rotational motive force, and a stator having a plurality of coils opposing the rotor with an aperture therebetween, is provided. The device includes a sensor configured to detect an induced voltage induced by rotation of the rotor, and a controller configured to control the motor by supplying power to the plurality of coils in response to an input of a detection signal from the sensor. The controller estimates a temperature of one of the magnets based on an amplitude of a frequency spectrum corresponding to a given frequency, among frequency components constituting the induced voltage.

A temperature sensing device for a temperature-based tamper detection system includes an integrated circuit (IC) and a logic circuit. The logic circuit sends an enable signal to the IC, causing it to measure the device temperature, and initiates a security timer. In response to not receiving the device temperature before the security timer expires, the logic circuit outputs a tamper event signal and an error code. The logic circuit can disable the enable signal in response to not receiving the device temperature before the timer expires. In some implementations, the logic circuit is a first logic circuit, and the IC includes an analog integrated circuit (AIC) and a second logic circuit. The second logic circuit receives the enable signal from the first logic circuit, causes the AIC to measure the device temperature, and outputs a ready signal and the device temperature to the first logic circuit.

A process fluid temperature estimation system includes a mounting assembly configured to mount the process fluid temperature estimation system to an external surface of a process fluid conduit. A sensor capsule has at least one temperature sensitive element disposed therein and is configured to sense at least a temperature of the external surface of the process fluid conduit. Measurement circuitry is coupled to the sensor capsule and is configured to detect a characteristic of the at least one temperature sensitive element that varies with temperature and provide sensor capsule temperature information. A controller is coupled to the measurement circuitry and is configured to obtain a temperature measurement of the external surface of the process fluid conduit and to obtain a reference temperature and employ a heat transfer calculation with the reference temperature, the external surface temperature measurement and a known thermal relationship between the external surface temperature sensor in the sensor capsule and the reference temperature to generate an estimated process fluid temperature output. The controller is also configured to improve response time of the process fluid estimation system mathematically. In some examples, the controller is configured to extract the system tau value from the measured data.

Embodiments of the disclosure disclose a method and an apparatus for implementing a virtual sensor (for example, a virtual thermistor) for checking temperature (or heating) of an electronic device by the electronic device. An electronic device according to various embodiments includes a plurality of electronic components mounted into the electronic device, and a processor operatively connected to the electronic components, wherein the processor is configured to classify a prediction area according to predetermined characteristics, configure a virtual thermistor corresponding to the prediction area, based on the classification characteristic of the prediction area, collect information on at least one prediction area, based on the virtual thermistor, and manage heating of the electronic device, based on the collected information. Various embodiments are possible.

Embodiments of the disclosure disclose a method and an apparatus for implementing a virtual sensor (for example, a virtual thermistor) for checking temperature (or heating) of an electronic device by the electronic device. An electronic device according to various embodiments includes a plurality of electronic components mounted into the electronic device, and a processor operatively connected to the electronic components, wherein the processor is configured to classify a prediction area according to predetermined characteristics, configure a virtual thermistor corresponding to the prediction area, based on the classification characteristic of the prediction area, collect information on at least one prediction area, based on the virtual thermistor, and manage heating of the electronic device, based on the collected information. Various embodiments are possible.

A battery system includes a battery module, thermistor, and ECU. The thermistor detects the temperature of a first area in the battery module. The ECU calculates the estimated temperature of a second area having a higher temperature than the first area in the battery module, by adding a temperature correction amount to a detected value of the thermistor. The ECU is configured to set the temperature correction amount according to a time differential value of the detected value. Then, the ECU sets the temperature correction amount such that the rate of increase of the estimated temperature of the second area does not exceed a predetermined rate that is larger than zero.

A short circuit detection circuit includes a current terminal, a sense resistor, an amplifier, and a resistor-capacitor ladder. The sense resistor is coupled to the current terminal, and is configured to develop a sense voltage proportional to a current through the current terminal. The amplifier is coupled to the sense resistor, and is configured to generate a scaled current proportional to the sense voltage. The resistor-capacitor ladder is coupled to the amplifier, and is configured to generate a measurement voltage that represents a surface temperature rise due to the current through the current terminal.

A sensor device for calculating air temperature includes a support structure, to be traversed by the air and defining a seat having an air inlet and an air outlet, and a sensor arranged inside the seat to detect at least one first value and at least one second value of the air temperature that traverses the seat. The sensor device is configured so that, when detecting the first and second value, the air traverses the seat at a first and at a second speed, at which the sensor has a first and second heat transfer coefficient and first and second radiant power. The ratio between air speeds, heat transfer coefficients, or radiant powers is predetermined. The sensor device can be used with a data processing logic unit that calculates the air temperature starting from the first value, the second value, or the ratios between air speeds and radiant powers.

Various non-invasive sensors are adapted to be placed on a surface of an object having a volume with an internal region. The internal region of the object has internal properties indicated by corresponding internal parameters and an internal temperature distribution that is a function of the internal parameters and surface thermal signals. Each non-invasive sensor includes a heat flux sensor having one or more heat flux sensor output terminals to provide a measured heat transfer signal for the surface of the object, and a temperature sensor having one or more temperature sensor output terminals to provide a measured temperature signal for the surface of the object. Systems including one or more of the sensors perform non-invasive sensing of the object including accurate and rapid determination of an internal temperature distribution of the internal region of the object as well as one or more other internal properties of the object.