SU522472A1 - Phase Sensitive Voltmeter - Google Patents

Description

The invention of::. s, q € ETpH46CKHSi measurements in ciapaia: L nvKOBitTK and nfra. I sound frequencies in echeals with the appropriate sensors of this set are used when measuring information characteristics - g tick, / for example, HG / 1 and Hm-Hm: HG: Drink,

Known.: -;: .-, - h-, g & TpLij

the basis of which is o5para; The nature and npoHareonSjjLHE snoring of JQ instantaneous values of Esop, i -of-o and reference signals, followed by C1 pa: by sewing or integrating the ut-gtuskeni product, with a similar KOHCTpyii-nin fa and sensitive voltmeters have incomplete overlap jj hj hj hj hj hj hj hj hj hj hj hj hj hj hj hjg. Atetehnoogich JHDCTb range of main cores, etc. I The Phase-sensible voltmeter is known, | containing serially connected INPUT attenuator system of key elements, decoder., countersh-shkolkusov and | Reset reset, amp & Attenuus {second through from ny camera in cold climates frequency transformations Nrazovatel connected to reversivppi sche-rchij | KOM, connected between the synchronizer 25

the time base generator and the readout device “connected to the time base generator and to the key system: elements 1.21,

; However, such a device has a low speed, since the value of the signal weakening by the signal input attenuator is set in accordance with the signal parameters and the lack of accuracy, due to nonlinearity, of the module of the frequency converter and overflow; reversible counter with significant signals.

The purpose of the invention is to increase the speed and accuracy of phase-sensitive I voltmeter.

This is achieved by introducing an element into the known I device (ET: AND / l, subclutegte: link to the pulse counter and the reset node, coincidence circuits connected between the OR element and the synchronizer, reversible grigger cells, outputs connected to the coincidence circuits, the output of the reset node is connected simultaneously with the second 35 input of a reversal counter, a time base generator, a time relay connected between the synzfonieter and the time base former, and one of the inputs of the reverse trigger cells, the second output of one of which The reversal cell is connected to the other input, and the input is connected to the output of the reversible counter. The drawing shows the structural diagram of the proposed device. The phase-sensitive voltmeter contains an input attenuator 1, a measuring frequency converter 2, a reversible counter 3, a counting device 4 , synchronizer 5, time relay 6, time base generator 7, key system, elements 8, reset node 9, deisphrator 10, pulse counter 11, element OR12, scaling circuits 13, 14, and reverse trigger points The terminals 15, 16. The measured signal is attenuated to the required level by the input attenuator 1, converted into a partially modulated measurement of the pulse frequency converter 2 and feeds from to (one of the reverse pulse counter 1 (RCI). The operation of the latter is set by the synchronizer 5. Reverse The pulse counter operates alternately in summation and subtraction modes of the input signal. When measuring the real and imaginary component of the signal, the pulse sequences that control the pSI are shifted in the synophonizer by a quarter of the operating frequency period. The time interval (.Ы signal periods), during which the measurement is made, is determined by the time base former (FIB) 7, driven by the synchronizer through time relay 6. The amount of attenuation introduced by the attenuator 1 into the voltmeter path is set by pulse counter 11 through the decoder 1O And a system of key elements 8, also associated with a reading device 4, for which information about the magnitude of the measured component and the established attenuation of the signal is transmitted. The other nodes of the voltmeter are for dl / automatic selection of measurement limits. the beginning of the measurement cycle of the PBI, the SI, the time relay, the pulse counter 11, and the trigger cells 15, 16 are reset to zero. Then, by the FBI signal, the RCI input is released for K signal periods. If the signal is small and the RCI does not overflow during this interval, e72, then the measurement process ends. With significant signals, the RSI overflows. Depending on the sign of the number accumulated by the RSI, the control pulse generated by the synchronizer passes through the coincidence circuit 13 or 14 and the OR element 12 to the pulse counter 11, which increases the attenuation of the input attenuator, resets the digital components of the system and starts the time relay 6, turning off The FBV ov of the synchronizer for some time during which transients cease in the frequency-selective circuits of the voltmeter. Then the time relay reconnects CKHxpOHHsaTqp to the PBX and the measurement process automatically repeats, but with more attenuation introduced by the input attenuator into the voltmeter path. When the pulse counter overflows, the attenuator is disconnected from the measuring frequency converter, and the corresponding information is included on the reading device. In the proposed design of a phase-sensitive PiPetr, the required measurement limit is established over several signal® periods, thereby increasing the rapidity of the device and its practical accuracy. Phromucleus of the invention A phase-sensitive voltmeter containing serially connected input attenuator, a system of key elements, a decoder, a pulse counter and a reset node, the output of the input attenuator being connected to a reversible counter connected between the synchronizer, time base generator and the reference a device connected to a time base former and to a system of key elements, characterized in that, in order to improve speed and Accuracy, the FUNCTION element is inserted into it, connected to the pulse counter and the reset node, the coincidence circuits connected between the elements. the OR volume and the synchronizer, reversible trigger cells, outputs connected to the coincidence circuits, the output of the reset node is simultaneously connected to the second input of the reversible counter, the time base generator, the time relay connected between the synchronizer and the time base driver, and one of the inputs reverse trigger cells, the second output one

55224726

of which another rever-1 is connected to the entrance. Novitsky P.V., Knorring V.G ,, Gutsivnaya trigger cell, and the input is connected to anyone V.S. Nifrszhsh devices with frequency to the output of the reversing counter ml. Sensors. L., Energie, 1970, p. 386,

Sources of information taken in question 2. Copyright witness-geo USSR

manna during examination .. Mg 196447, N OZ K 13/20 from 29.O5.64.