SU1439738A1 - Displacement digitizer - Google Patents

Abstract

The invention relates to motion digital converters to code and can be used to convert rotational or translational movement to code in various technical fields. The aim of the invention is to improve the accuracy and reliability of the converter. Two N-channel multiplexers 3, 4 and a reversible counter 5 with a counting factor N are introduced into the motion converter in the code containing N sensitive elements li-lv and N drivers 2i-2ji / pulses. The introduction of additional elements and connections allows to increase the accuracy transformations by dividing the motion cycle into N quanta (N 3). In one movement cycle, the converter generates N control counting pulses. By blocking the output of control pulses when uncertainty arises in the direction of displacement, the “Transducer reliability. 3 ill., 1 tab. (L

Description

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The invention relates to motion digital converters to code and can be used to convert rotary or progressive movement to code in various technical fields.

The aim of the invention is to ensure the accuracy and reliability of the displacement transducer in the code

Figure 1 is a schematic diagram of the proposed device; FIG. 2 is a schematic diagram of a converter in a specifically implementation for case N 3 (three-quantum and converter); on - diagram of the operation of the Converter for N 3.

The displacement transducer to the code contains N sensing elements l /) - l | V, N pulse formers, two N-channel multiplexers 3 and 4, a reversible counter 5 with outputs 6, multiplexers 3 and 4 have address inputs 7 and 8, respectively, outputs 9 and 10 N-channel multiplexers 3 and 4, respectively, are Outputs + A and A ––, Consider the operation of a converter using the example of a converter containing three sensitive elements C, two three-channel multiplexers 3 and 4 with common address inputs, a reversible counter 5 has koee1) fitsie nt bills 3.

On fig.Z are marked: a, b, c - diagrams of the STATE of the outputs of the shapers of 2i-2e pulses, respectively; g, d - state of the outputs 6 of the reversible counter 5; e, g is the diagram of the outputs 9 and 10 of the converter; Areas A and G illustrate testing the displacement of the converter in the directions and -, respectively, Account + and Account Parts B and C - working out the type of uncertainty ... X X X X ... and ... XY XY X .., 5GdeHi If - the signals from the outputs of the corresponding drivers 2 pulses.

The converter works as follows,

When testing the movement at the outputs of the sensing elements, electrical-electric signals are formed that are converted by the pulse shaper into pulse signals of a logic level, and the direction of movement + or ° determines the sequence of arrival of the pulses; It was assumed that the successive arrival of pulses rto to channels 1,2,3,1,2 ... corresponds to the direction H, and the consecutive arrival of pulses through channels 2,1,3,2,1 ... to the direction -, in this case counting pulses at the outputs 9 and 10 of the device, respectively Account + and Account -. Input impulses are fed to the inputs of multiplexer channels 3 and 4. With constant movement in one direction, for example, in the + direction, each next pulse coming from the corresponding generator 2, for example, from generator 2 /, passes through multiplexer 3 through the corresponding. it is channel 1, is output to the converter 9 output 9 as a control signal, simultaneously causing the reversing counter 5 to operate. annom case - by vtoro-- th channel, etc. The remaining channels of the multiplexers are blocked to receive pulses from the corresponding drivers, thus ensuring high reliability (reliability and noise immunity) of the conversion.

When reversing the displacement, the converter begins to generate counting pulses at output 10 Counting -, only starting with the arrival of a pulse from the driver at the second channel of multiplexer 4. Next, due to n full symmetry of the circuit, the converter works in the same way as at the + direction, generating output 10 at output 10 Account Management -.

The converter completely blocks the interference of the type ... X X X .., (where X is a pulse coming only on one channel) on any channel, which ensures high reliability of conversion of movement to code.

The conversion of signals arriving from shapers 2 | -25 into control signals occurs without loss of pulses, which ensures high accuracy of conversion of movement into a code.

In addition, the converter provides an adjustable delay in the output of control signals at the outputs 9 and 10 when reversed, which ensures the issuance of control signals only when movement is confirmed. Uelo

The proof of the steady-state direction of movement is the arrival of an ordered sequence of pulses from adjacent shapers of 2 pulses. The number of these pulses is given by P (M - 2); for example, when this delay will be three pulses, and for M 2 the delay in the issuance of

there will be no equal impulse. Thus, when the movement is reversed, in the first case, the control pulses are generated, starting with the fourth pulse of the sequence, and in the second - from the first. This property of the converter makes it possible to block the output of control signals in case of non-definitions of the type ... X Y X Y ...

The table explains the pulse passing conditions from the drivers for a specific implementation of the device.

N 3, M 2.

Formula, Invention

The transponder is moved to a code containing N channels, each of which is

397384

The second one contains a sensitive element, the output of which is connected to the input of a pulse shaper, which is due to the fact that, in order to increase the accuracy and reliability of the converter, a reversible counter with the counting factor N and the first and second N-channel multiplexers are entered into it, which are connected respectively to the first and second inputs of the reversible counter and are outputs of the converter, the outputs of the reversible counter are connected to the address inputs of the first and second N-channel multiplexers, the output of the driver i-ro channel pulses, where i - the channel number is connected to the i-th input of the first N-channel multiplexer and to the (i + M) -M input of the second N-channel multiplexer, where M is I, 2,3, ... , (N-1) - coefficient, with i (NM) or (i + MN) -M input of the second N-channel multiplexer with i NM, and N 3.

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Claims (1)

Formula; -inventions A displacement transducer in a code containing N channels, each of which contains a sensing element, the output of which is connected to the input of a pulse shaper ', characterized in that, in order to increase the accuracy and reliability of the transducer, a reversible counter with an account coefficient N and the first and the second N-channel multiplexer 10, the outputs of which are connected respectively to the first and second inputs of the reverse counter and are the outputs of the converter, the outputs of the reverse counter are connected to the address and inputs of the first and second N-channel multiplexers, the output of the i-ro channel pulse former, where i is the channel number connected to the i-th input of the first N-channel multiplexer and to the (1 + M) -m input of the second N-channel multiplexer, where M = 1,2,3, ..., (N-1) is the coefficient at ϊ £ (NM) or (i + MN) -M by the input of the second N-channel multiplexer at '25 ί 7 Ν-Μ , moreover, N ^ 3. Code on address inputs 7 and 8 Multiplexer input 3 Multiplexer Input 4 00 1 2 01 2 . 3 10 3 1 JlJlTLJinJTJl