摘要:
A planar current sensor assembly (1) has a metal layer (40) deposited on a silicon substrate (31) and connected at opposite ends to upper and lower copper plates (20 and 21), which make connection with conductors (3 and 6) in a circuit through which the current flows. The metal layer (40) has wide regions (41 and 42) at opposite ends and a narrow region (43) between them so that the central, narrow region is heated more than the end regions. The assembly has a diamond layer (34) between the wide, end regions (41 and 42) and the substrate (31), and a thermally-insulative pad (35) beneath the narrow region (43). Heat is dissipated more rapidly from the end regions through the diamond layers, which have a high thermal conductivity. Three tempeature sensors (46, 47 and 48) mounted on the metal layer (40) senses the temperature of the two end regions (41 and 42) and the central region (43). A circuit (36, 37) in the sensor assembly is connected to receive the outputs of the three sensor and provides an output indicating current flow.
摘要:
The electric resistor can make a resistance value ratio constant due to the change of frequency from D.C. to 32 GHz by use of a Ge-Si mixed crystal thin film equipped with an amorphous phase and a crystallite phase as an electric resistor. The power detector forms a thermocouple by connecting the mixed crystal thin film described above which has large thermoelectric power and a conductor thin film, disposes a beam lead electrode at a cold junction of this thermocouple and provides a large temperature difference between a hot junction and the cold junction in order to generate a sufficiently large thermal gradient and to improve power detection accuracy.
摘要:
A thermo-optical current sensor includes a resistive or semiconducting sensing element that has an optical property that varies as a function of temperature. Current to be measured flows through the sensing element thereby causing heating that is detected by a change in the optical property. The sensing element may be either a resistive or semiconducting material having a temperature dependent optical property or a resistive or semiconducting material that is in thermal contact with an optical temperature sensor. The thermo-optical current sensor may be used as a field meter to measure the intensity of an electromagnetic field or as a current meter to measure the current flowing through a power line.
摘要:
A method of measuring the root-mean-square value of voltage consists in converting the measured voltage into a heat flow, converting a reference voltage into a cooling flow, adjusting the reference voltage so that the heat flow resulting from the measured voltage is compensated by way of its absorption in the cooling flow resulting from the reference voltage, under the conditions of thermal insulation from the influence of the environmental medium, and in determining the root-mean-square value of the measured voltage on the value of the reference voltage.
摘要:
Die Erfindung betrifft ein elektronisches Bauelement (1), insbesondere einen Stromsensor, mit einem Widerstandselement (5) aus einem Widerstandsmaterial, einem ersten Anschlussteil (3) aus einem Leitermaterial zur Einleitung eines elektrischen Stroms in das Widerstandselement (5), und einem zweiten Anschlussteil (4) aus einem Leitermaterial zum Abführen des elektrischen Stroms von dem Widerstandselement (5). Erfindungsgemäß weist das Bauelement (1) eine Temperaturmesseinrichtung (8) auf zur Messung einer Temperaturdifferenz zwischen dem Widerstandselement (5) einerseits und mindestens einem der beiden Anschlussteile (3, 4) andererseits, um aus der Temperaturdifferenz den Strom abzuleiten.
摘要:
A thermo-optical current sensor includes a resistive or semiconducting sensing element that has an optical property that varies as a function of temperature. Current to be measured flows through the sensing element thereby causing heating that is detected by a change in the optical property. The sensing element may be either a resistive or semiconducting material having a temperature dependent optical property or a resistive or semiconducting material that is in thermal contact with an optical temperature sensor. The thermo-optical current sensor may be used as a field meter to measure the intensity of an electromagnetic field or as a current meter to measure the current flowing through a power line.