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  2. Four-terminal sensing - Wikipedia

    en.wikipedia.org/wiki/Four-terminal_sensing

    Four-point measurement of resistance between voltage sense connections 2 and 3. Current is supplied via force connections 1 and 4. In electrical engineering, four-terminal sensing (4T sensing), 4-wire sensing, or 4-point probes method is an electrical impedance measuring technique that uses separate pairs of current-carrying and voltage-sensing electrodes to make more accurate measurements ...

  3. LCR meter - Wikipedia

    en.wikipedia.org/wiki/LCR_meter

    An LCR meter is a type of electronic test equipment used to measure the inductance (L), capacitance (C), and resistance (R) of an electronic component. [1] In the simpler versions of this instrument the impedance was measured internally and converted for display to the corresponding capacitance or inductance value.

  4. Kelvin bridge - Wikipedia

    en.wikipedia.org/wiki/Kelvin_bridge

    A Kelvin bridge, also called a Kelvin double bridge and in some countries a Thomson bridge, is a measuring instrument used to measure unknown electrical resistors below 1 ohm. It is specifically designed to measure resistors that are constructed as four terminal resistors.

  5. Electronic throttle control - Wikipedia

    en.wikipedia.org/wiki/Electronic_throttle_control

    A typical ETC system consists of three major components: (i) an accelerator pedal module (ideally with two or more independent sensors), (ii) a throttle valve that can be opened and closed by an electric motor (sometimes referred to as an electric or electronic throttle body (ETB)), and (iii) a powertrain or engine control module (PCM or ECM). [4]

  6. Strain gauge - Wikipedia

    en.wikipedia.org/wiki/Strain_gauge

    Temperature effects on the lead wires can be cancelled by using a "3-wire bridge" or a "4-wire ohm circuit" [7] (also called a "4-wire Kelvin connection"). In any case it is a good engineering practice to keep the Wheatstone bridge voltage drive low enough to avoid the self heating of the strain gauge.

  7. Contact resistance - Wikipedia

    en.wikipedia.org/wiki/Contact_resistance

    The direct methods able to measure potential drop on the injection electrode directly are the Kelvin probe force microscopy (KFM) [5] and the electric-field induced second harmonic generation. [ 6 ] In the semiconductor industry, Cross-Bridge Kelvin Resistor(CBKR) structures are the mostly used test structures to characterize metal ...

  8. Test probe - Wikipedia

    en.wikipedia.org/wiki/Test_probe

    Test leads are usually made with finely stranded wire to keep them flexible, of wire gauges sufficient to conduct a few amperes of electric current. The insulation is chosen to be both flexible and have a breakdown voltage higher than the voltmeter's maximum input voltage.

  9. Electronic control unit - Wikipedia

    en.wikipedia.org/wiki/Electronic_control_unit

    An electronic control unit (ECU), also known as an electronic control module (ECM), is an embedded system in automotive electronics that controls one or more of the electrical systems or subsystems in a car or other motor vehicle.

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