SU734773A1 - Method of converting displacement into code - Google Patents

Method of converting displacement into code Download PDF

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Publication number
SU734773A1
SU734773A1 SU772505580A SU2505580A SU734773A1 SU 734773 A1 SU734773 A1 SU 734773A1 SU 772505580 A SU772505580 A SU 772505580A SU 2505580 A SU2505580 A SU 2505580A SU 734773 A1 SU734773 A1 SU 734773A1
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SU
USSR - Soviet Union
Prior art keywords
code
voltages
phase
voltage
rectangular pulses
Prior art date
Application number
SU772505580A
Other languages
Russian (ru)
Inventor
Виктор Дмитриевич Кравченко
Original Assignee
Всесоюзный заочный машиностроительный институт
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Application filed by Всесоюзный заочный машиностроительный институт filed Critical Всесоюзный заочный машиностроительный институт
Priority to SU772505580A priority Critical patent/SU734773A1/en
Application granted granted Critical
Publication of SU734773A1 publication Critical patent/SU734773A1/en

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Description

be used due to the unequal withdrawal of the various channels of the transducer formed by each of the spaces shifted in phase). The aim of the invention is to improve the accuracy of the conversion. This is achieved by comparing the durations of rectangular pulses with each other, and according to the results of the comparison, the phases and levels of the reference voltages change relative to the zero supply, the voltages to the condition that the rectangular pulses are equal, coarse readings of different spatial phases are formed between each other, and, based on the results of the comparison, a coarse reference code is formed, and an accurate reference code is formed from the amplitude of the envelope voltages in the interval x times corresponding to the quantum of the rough counting code. The invention is illustrated by the example of a device implementing the proposed method. FIG. 1 shows a block diagram of the device; Fig, 2 - diagrams of his work. For simplicity, the construction of a transducer with two spatially shifted sensitive elements is considered. The transducer rotor 1 is connected with the object to be monitored (not shown in Fig. 1), the transducer sensing elements 2 are shifted by the value "(the sequence number is where 1 is the sensitive element, the number of transducer channels is angular). The spatial phase f is displaced. signal voltages of sensitive elements Uei. From the unit of the reference voltage, voltage C ,, .. Fig. 2 shows the signal voltage Up. from the output of one channel. This voltage is fed to the input of the phase-sensitive amplifier 4, where In the case of onqDHbTM voltage C) 1, when the rotsra 1 is displaced by an angle q, n, (0-g), the ampl varies within the range Ujj: from O to the maximum, and at angle of increase Q phase of the negative voltage. On the output of the phase-sensitive amplifier 4, at the moments of coincidence of the signs of the phases of the reference and signal voltages, an envelope of the signals (a, b), a positive sign (see Fig. 2) is formed, and if the signs are different, another g) from zero to the supply voltage E, FIG. 2, the electrical phases of the voltages and UQ have a phase shift, and since the phase-sensitive amplifier has an output integrating circuit, the time At) its resultant signal A in the positive region in the presence of a phase shift will be less than the time D +, it will be in the negative one. Accordingly, heterogeneous (1 and O) code signals Uj-j, formed by the threshold element o, will be different in length. Through the switch 6, these signals are sent to the meter 7 of the code signals, which measures the time i or the angle O of the code signals, transmits the result to the memory block 8 and the control block 9, which shows which of the signals 1 or O is longer in length and gives out a regulating effect on the phase shifter U and the level 11 regulator of the operating voltage, which in turn affect the block 3 of the reference voltage. When the level of the reference voltage changes, the sensitivity of the phase-sensitive operational amplifier 4 is changed by its reference input, and when the phase changes, the phase U of the reference voltage is adjusted (). Since the voltage (jL, Uo, Uort must be the same frequency as indicated above it is convenient to produce in discrete form, and then using analog filters to make the selection of the required signals supplied to the block 3 of the reference voltage and the block 12 of the power supply of the sensitive elements 2. Thus, it is possible to carry out an individual adjustment of each of the channels connected alternately to the switch 6; measuring the lengths of the code signals, for example, is easy to fill with a reference frequency corresponding to 1 {x time intervals followed by counting. After the adjustment is performed on all channels, the control unit 9 issues a command to connect the logical selection unit 13. the basis is the logical inequality operation over the signals of a system of spatially shifted codes (see FIG. 2) Up - UbUjb + y bU b, (2) hei, - output channel 1 code signals, - output channel signals D of the channel, output code signals of block 13. These code signals go to register 14 of the highest code bits. According to this information, the control unit 9, via the switch 15, connects to the unit 16 amplitude-to-code conversion according to the order i of the arrangement of the sensitive elements 2. Output signals of the photoelectric amplifiers, t, e. envelopes with different spatial phases. The output code of block 16 enters the register of 17th least bits. Since the spatial phases of the envelopes are shifted according to the curve. Gen- eral (1), the amplitude conversion will be carried out in the same range, the smaller the larger the number n of spatial phases. This circumstance makes it possible to significantly simplify the amplitude conversion unit 16 of constant voltage into code and to obtain greater conversion accuracy. On the basis of the proposed method, movement can be encoded with an accuracy when using contactless inductosin up to 1O angular seconds with a speed of outputting information up to hundreds of kilohertz with the existing technology and integrated elements manufactured by domestic industry. 773 of the invention Способ Movement conversion method No to a code based on the conversion of the movement into signal voltages shifted in spatial phases, compression of the phase of the signal voltage with the phase of the reference voltage and the selection of envelopes, the formation of rectangular pulses according to the polarity of the envelopes characterized in that, in order to improve the accuracy of the conversion, the durations of the rectangular pulses are compared with each other and according to the results of the comparison, the phase shift and the levels are controversial voltages with respect to zero supply voltages up to the condition of equality of the duration of rectangular pulses, compare rectangular pulses of different spatial phases with each other and, based on the results of the comparison, form a rough reference code, and the exact reference code is formed from the voltage amplitude in time intervals corresponding to the code quantum countdown. Istoschiki information taken in BHiSvfaHHe in the examination 1. Authors-Certificate of the USSR for application number 2305434 / 18-24, l. Q 08 C 9/00, 1975. 2. The USSR author's certificate 570078, cl. Q OB C 9/04, 1973 prototype).
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Claims (1)

  1. Claim
    A method of converting movement to a code based on converting movement into spatial-phase-shifted signal voltages, comparing the phase of the signal voltage with the phase of the reference voltage and isolating the envelope voltages, generating rectangular pulses corresponding to the polarity of the envelope voltages, characterized in that, in order to increase the accuracy of the conversion, compares the duration of the rectangular pulses with each other and according to the results of the comparison change the phases and levels of disputed stresses relative but zero supply voltages up to the condition that the duration of rectangular pulses is equal, rectangular pulses of different spatial phases are compared with each other and, based on the results of the comparison, form a coarse reference code, and the exact reference code is formed from the amplitude of the envelope of voltages in time intervals corresponding to the quantum of the coarse reference code.
SU772505580A 1977-07-05 1977-07-05 Method of converting displacement into code SU734773A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU772505580A SU734773A1 (en) 1977-07-05 1977-07-05 Method of converting displacement into code

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU772505580A SU734773A1 (en) 1977-07-05 1977-07-05 Method of converting displacement into code

Publications (1)

Publication Number Publication Date
SU734773A1 true SU734773A1 (en) 1980-05-15

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Family Applications (1)

Application Number Title Priority Date Filing Date
SU772505580A SU734773A1 (en) 1977-07-05 1977-07-05 Method of converting displacement into code

Country Status (1)

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SU (1) SU734773A1 (en)

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