Abstract:
A heat radiation coefficient C [=Ph/(Th−To)] from a microheater is calculated in accordance with a power Ph applied to the microheater which is supported in air and provided in an ambient gas, a heater temperature Th, and an ambient temperature To at this moment. Further, a thermal conductivity λ(T) of the ambient gas is obtained from the calculated heat radiation coefficient C based on a proportional relation [C=K·λ(T)] between a thermal conductivity λ(T) of the ambient gas and the heat radiation coefficient C at a measurement temperature T [=(Th−To)/2].
Abstract:
An oil burner ignition circuit using a relaxation oscillator is disclosed. The step-up transformer has a tertiary winding magnetically coupled to a primary winding. The tertiary winding and a diode controls the dissipation in the circuit, and the recovery of energy to a capacitor of the relaxation oscillator.
Abstract:
A heat radiation coefficient C [=Ph/(Th−To)] from a microheater is calculated in accordance with a power Ph applied to the microheater which is supported in air and provided in an ambient gas, a heater temperature Th, and an ambient temperature To at this moment. Further, a thermal conductivity λ(T) of the ambient gas is obtained from the calculated heat radiation coefficient C based on a proportional relation [C=K·λ(T)] between a thermal conductivity λ(T) of the ambient gas and the heat radiation coefficient C at a measurement temperature T [=(Th−To)/2].
Abstract:
A heater pattern is arranged on at least one substrate among substrates configuring a package, and a temperature in the package is controlled by controlling a quantity of electricity carried to the heater pattern corresponding to the ambient temperature of a sensor chip in the package.
Abstract:
A calorific value calculation formula generating system is equipped with a measuring mechanism for measuring heat dissipation constant values or thermal conductivity values of each of plural mixed gases each containing plural kinds of gas components at plural temperatures; and a formula generation module for generating a calorific value calculation formula having heat dissipation constant or thermal conductivities at the plural temperatures as independent variables and a calorific value as a dependent variable on the basis of calorific value values of the plural mixed gases and the heat dissipation constant values or the thermal conductivity values measured at the plural temperatures.
Abstract:
An ignitor includes a first transistor, a transformer, an ignition member, and a switching control member. The first transistor is activated in accordance with supply from a DC power supply to perform switching. The transformer has a primary winding through which a switching current flows via the first transistor, a secondary winding for generating high voltage when the switching current flows through the first winding, and a tertiary winding for generating a control output for controlling the switching of the first transistor in accordance with the high voltage generated in the secondary winding. The ignition member ignites a target object using the high voltage generated in the secondary winding of the transformer. The switching control member prolongs the ON time for the switching of the first transistor in accordance with a decrease in at least one of the ambient temperature and the power supply voltage.