SU395731A1 - - Google Patents

Description

rum RT C collector T control pulses are supplied to the bases of different polarity transistors T and Tr ,; in one of the half periods of tact, the traizistor T is locked, and the Tg is unlocked, and the turn. The common point in the collectors is successively connected to the plus- + V or to the M-V of the power supply J5. The potential of point r depends on the magnitude of the resistors /, and R-2, and can be adjusted, for example, by shorting the part. Points c-g are electrically connected to the windings of the coils 5 of a 5-component and 4-5 transformer. The shape of the output current pulses is observed by an oscilloscope 6. The switch Si is used when manually adjusting the amplitudes of the current / "to both half-cycles. The durations ti and /, half cycles of a cycle are, as a rule, chosen the same (symmetric mode), and the amplitudes of the current are. such that the resulting stiffness of the suspension alternates between positive and negative factors, and equal to each other in absolute value:, + .., The device works as follows. Let the glass / affect the measured time M, causing it to imbalance Der. The emerging sigal: decontrolling is picked up by the uncrc-6ency converter 6–9 and, after the passage of amplifier 12, is applied as a current I, ay to the coil and 5, causes glass 1 to return from to position, b. to the original (with the exception of residual mismatch AF). The current / output is proportional to the measurement of the cumulative mrmeite L. At switching on the 7V-Gz clock generator and the operation of the keys Gz, the rigidity of the suspension, as described above, changes. If the stiffness of the suspension ip. Variable takes the value, then the system of urge weighing works in the modulated “mode, the transition from the under-compensation mode (when relative is not commensurate,), to the ire-compensation mode (when a is negative); output current / output alternately, it does not mean the average value / output F then it is equal to it (see Fig. 2). When the nsio.tvrviya of the magnetoelectric inverse transducer of a and c (equal: а.,:. 0; a. / Go: + IVCIR KS and / (o., Where / Co is the static transfer coefficient of the non-amplification transducer and amplifier; P and R is the transmission coefficient and the resistance of the frame of the inverse transformer. As shown above, its difference and the commanding device differ in sign and modulus, but are close to their magnitude, and therefore the resultant measurement of G; .., applied directly to the transformation, changes: Fig. 2 show that iri Al const is increased AND the amplitude of the output current / output. In one of the noluperidov nz-due to the resulting error of the right of my circuit is compensated for by the current loss / in the second half, and the average value / output. current measured by iribor 13, tends to be preserved isemic. In Fig. 2, a compensating device structure is given in. In this diagram, the following notation is used: /, fj ,, Wl and Wz - moment of inertia, coefficient of suppression, resulting stiffness of suspension (in two modes of operation); f is the time constant of the amplifier; T; and T /. ---- Constant inverter times; P-operator Laplace. Subject and reference; Compensation power meter, containing the sensitive element of the elastic supports, sensor and reshaped, closed through a negative feedback amplifier to the force sensor, characterized in that It is equipped with an adjustable stiffness compensation system for an elastic suspension; in this case, the compensation system is made in the form of a movable magitite installed in the field of fission coils, the windings of which are connected to an adjustable DC source. 2. A device of claim 1, characterized in that, in order to increase accuracy, the current source is connected via a switch that changes the polarity of the current in the compensation coils, this switch input is connected to a generator of clock pulses that control the switch of the switch of the switch.

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