| 摘要 |
FIELD: measurement equipment.SUBSTANCE: invention relates to measurement equipment and may be used in a system of thermal regulation and telemetry of spacecrafts (SC). A multi-channel device for temperature measurement comprises resistance thermometers (RT), master resistors (MR), the common point of which is connected to the common bus, a stable current generator (SCG), one of leads of which is connected to the common bus, three amplifiers, connected in series to it, a control circuit (CC), eight multi-position unipolar electronic switches (MPUES). The other lead of the SCG is connected to the pole outlet of the first MPUES. Position leads of the first and second MPUES are combined in pairs and connected to the RT. Position leads of the third and fourth MPUES are combined in pairs and via newly introduced chains of two serially connected calibration resistors are connected to the common bus. Pole leads of the second, fourth and fifth MPUES are combined together and connected to a non-inverting inlet of the first amplifier. Also the additional SCG is introduced, which is included between the common bus and the pole lead of the sixth MPUES. Position leads of the sixth and seventh MPUES are combined in pairs and connected to the MR. The pole lead of the seventh MPUES is connected to the inverting input of the first amplifier. The second amplifier is made with the amplification ratio switched eighth MPUES. Outlets of the CC are connected by permission inlets and addresses of all MPUES.EFFECT: higher accuracy of measurement data.1 dwg |
