| 摘要 |
FIELD: engineering of devices for selecting and transforming signals of electromagnetic-type flow meter. ^ SUBSTANCE: device contains pre-amplifier, adder, gated amplifier, gated integrator, synchronous detector, two selection and storage components, voltage-frequency transformer, control signals generator, excitation generator, current-lifting resistor, excitation current compensation component, optical coupler key. Output of pre-amplifier is connected to non-inverting input of adder. Output of adder is connected to input of gated amplifier. output of gated amplifier is connected to input of synchronous detector and to input of gated integrator. Output of gated integrator is connected to inverting input of adder. Output of synchronous detector is connected to input of first selection and storage component. Output of first selection and storage component is connected to first input of voltage-frequency transformer. First output of control signals generator is connected to controlling inputs of synchronous detector and excitation generator. Second output of control signals generator is connected to controlling input of gated amplifier. Third output of control signals generator is connected to controlling input of gated integrator. Fourth output of control signals generator is connected to control inputs of both selection and storage components. First output of excitation generator is connected to first output of excitation current compensation component, to first output of smoothing capacitor and to input of dampening component. Second output of excitation generator is connected to first output of current-lifting resistor, to non-inverting input of excitation current compensation component and to input of second selection and storage component. Output of second selection and storage component is connected to non-inverting input of excitation current compensation component and to second input of voltage-frequency transformer. Output of dampening component is connected to first output of consumption current modulator. Second output of current-lifting resistor is connected to second output of excitation current compensation component, to second output of smoothing capacitor and to second output of consumption current modulator. Output of voltage-frequency transformer is connected to input of consumption current modulator, to input of frequency-current transformer and to input of optical coupler key. As inputs of device, three inputs of pre-amplifier and two inputs of excitation generator are used. As outputs of device, first and second outputs of consumption current modulator, first and second outputs of frequency-current transformer and first and second outputs of optical coupler key are used. ^ EFFECT: expanded functional capabilities of device. ^ 4 dwg |
