SU1144192A1 - Device for encoding displacement - Google Patents

Abstract

DEVICE FOR CONVERSION-; NIA OF MOVEMENTS IN THE CODE, containing movable measles, a block of connected elements, connected to the input of the matching unit, the rough reference outputs of which are connected to the rough reference unit, the output of the exact reading of the matching unit, which, in order to improve the accuracy of the device , a switch is entered into it, the control inputs of which are connected to the coarse count outputs of the matching unit, the information inputs of the switch are connected to the additional outputs of the exact count of the co lasov, and you switch stroke is connected to the input i of the precision reference block.

Description

The invention relates to elements of automatic control systems, namely, displacement transducers into discrete electrical signals. A device for converting displacements into a code comprising a moving track with profiled code marks, near which a sensing element is connected to the inputs of the positive pulse former and the former negative pulses associated with the inverter, the outputs of the positive pulse generator and the inverter are connected to the reversing inputs The low count of the device is the low conversion accuracy. The closest in technical essence to the invention is a device for converting movements into a code containing measles, a block of working and indicator reading elements connected to the input of a matching block, the coarse readings of which are connected to the input of a coarse readout block, and the exact counting output is block accurate from / account 2j. A disadvantage of the known device is the low accuracy of conversion in the areas where the core is located opposite the center of the working reading elements, which is due to the fact that for these areas the dependence of the output signals of the matching elements on the core movements has a simplified form, which leads to inconsistency of output increments code at different intervals on the conversion range. The aim of the invention is to improve the accuracy of the device for converting movements into code. I The goal is achieved in that the DEVICE for converting movements into a code containing mobile measles, a block of matching elements, connected to the input of a matching unit, whose coarse outputs are connected to a coarse reference unit, and the output of the exact reading of the matching unit to the exact countdown, a switch is introduced, the control inputs of which are connected to the coarse counting outputs of the co2I lacquer block, the information inputs of the switchboard with additional outputs of the exact counting of the matching block, and the output switch - with the input of the unit of exact count. Fig. 1 shows a diagram of the device (for definiteness, with two working reading elements) in Fig. 2, the construction of a block of reading elements and a movable part; figure 3 - graphs of the dependence of the output signals and., reading elements and the dependence of the input signals of the block of the exact reference from the movement of the box. The device contains a block 1 of reading elements, a block 2 matching, a switch 3, a block 4 of rough counting, a block 5 of precise counting, the block 1 includes indicator reading elements 6-9 and working reading elements 10-11, which are connected respectively to detectors 12 -15 and 16-17 of unit 2. The output of detector 12 is with the inputs of elements 18 and 19 of the comparison, the output of the detector 13 with the inputs of elements of 19-21 of comparison,. detector output 14 with inputs of comparison elements 21-23, detector output 15 with inputs of elements 23 and 24, detector output 16 with inputs of comparison elements 18 and 20, as well as with key 25. Detector code 17, with inputs of elements 22 and 24 comparisons, and also with key 26, the keys 25 and 26 being connected to the output 27 of the accurate counting of block 2 connecting block 2 to the input of block 5, the first output of the compare element 18 and the first output of the comparison element 19 are connected to the element And 28. The second output of the element 19 of the comparison and the first output of the element 20 of the comparison is connected to the element And 29, the second The first output of comparison element 20 and the first output of comparison element 21 to element 30, the second output of comparison element 21 and the first output of comparison element 22 to element 31, the second output of comparison element 22 and the first output of comparison element 23 to AND 32, the second output of the comparison element 23 and the first output of the comparison element 24 to the AND element 33, the second output of the comparison element 28 and the output of the AND 30 element through the OR 34 element are connected to the control input of the key 35, and the VKOD of the AND 31 element and the second, 1 1 output of the comparison element 24 through the OR element 35 - with the control The key input 26, the outputs of the And 28-33 elements and the second output of the comparison element 24 are the coarse count outputs of block 2, the linking blocks 2 and 4, the block 3 contains keys 36-39, the information inputs of which are connected respectively to the outputs of the detectors 12-15, representing the additional outputs of the exact reference, block 2, and the control inputs of the keys 36-39 of block 3 are connected respectively to the terminals of elements 28 and 29, 32 and 33 of block 2. The keys 36-39 are also connected with the input of block 3, block 4 contains a code converter 40 connected to the coarse reference register 41 With the output 42 of the higher bits of the output code, the lower bit 43 of the register 41 is connected to the sampling element 44 of the block 5. To the input of the element 44 are connected successively interconnected voltage converter 45 to the code and the register 46 of the exact reference, output 47 of the element 44 is the output of the lower bit of the output code. The reading elements 6-11 are fixed on the diamagnetic base 48 (FIG. 2), along which the bark 49 moves, the reading elements 6-P are from magnetic cores 50 and windings 51. The device operates as follows. If the level of the signal supplied to the left of Fig. 1 input of any of the elements 18-24 of the comparison block 2 exceeds the signal level given by the lia right input of the same element, the unit state is its first output. If the signal supplied to the right input of any of the elements 18–24 of the comparison is higher in level than the signal affecting the 1DI on the left input, then in the unit state there is the second output of the given, element of the comparison (Fig. 1). The windings 51 of readout elements 6-11 of unit 1 are powered from an alternating current source (not shown). Denote by output detectors 12-17 output signals of reading elements 6,10,7,8,11 and 9 respectively. and, and, oh, and, Ug, and „and, and. if the center 49 is located within the indicator reading element b (section 0-1 / 4Т, Figures 1-3), its magnetic circuit has the greatest magnetic conductivity, since the gap H between the opposite ferromagnetic branches of its magnetic circuit 50 (FIG. 2) is overlapped by the core 49, and the signal level U exceeds the output levels of the other reading elements 7-11, in particular and. When this condition is fulfilled, the first code of the comparison element 18 is found in a single state. As can be seen from the graph of FIG. 3a, on the section T of the linear coordinate of the center of the core 49, the non-centrality Ug Ug 7 i U are executed. . Therefore, all the first outputs of the comparison elements 18-24 are in single states, and the second outputs are in zero states. Therefore, the outputs of the And 28-33 elements are in zero states, and only low level signals are sent to the input of the converter 40, which corresponds to the input code of block 4, equal to OOOOOOO. This combination is converted by converter 40 into a forward coarse binary code 000 (most significant bits of the output code of the device), and entered into register 41. In addition, a high level of the signal from the first output of element 18 opens key 25, and the output voltage of reading element 10 through the detector 16 and the key 25 enters the output 27 of the block 2 to the input of the converter 45, which digitizes and registers the code of the center of the core 49 inside the register 46 within a quarter of the step T of the installation of the working reading elements 10 and 11 (fig.ЗБ). This intra-step code represents the lower bits of the overall output code of the device. If measles 49 moves to the right. Along base 48, and its center moves within the 1/4 1/2 T area, then, as can be seen from 4mg. The following relation between the output signal levels of the matching elements 7-11 of block 1: CD is set. Ug. This means that in single states there is a second output of the comparison element 18 and the first outputs of the comparison elements 19-24. The outputs of the elements And 29-33 set the signals of low (zero) level, and the output of the element And 28 - a high signal (unit-1 level), the input of block 4 receives the code 1000000, converting the converter 40 to the form 001, which is entered into register 41. The high level signal from the output of the E and I 28 opens the key 36 of block 3, which transmits the voltage of the indicator reading element 6 transmitted by detector 12 to the input of the converter 45 of block 5, where it is converted to the lower bits of the output code of the device. With further movement of the center of the core 49 along the base 48 to the zones (1/2 T - 3/4 T), (3/4 T-T), (T-5/4 T) (5/4 T - 3/2 T ), (3/2 T - 7/4 T) and (7/4 T - 2 T) pass the corresponding changes in the output states of the comparison elements 18-24, similar to those considered, and the code combinations of the corresponding combinations arrive at the input of block 4 0100000 (converted by block 4 to high-order bits 010 of the output code). 0010000 (converted to high-order bits 011), 0001000 (100), 0000100 (101), 0000010 (110), 0000001 (111). These zones correspond to successive closures of keys 37, 25, 26, 38, 39, and 26, which transmit signals from matching elements 7, 10, 11, 8, 9, and 11 to the input of block 5 (Fig. 3). If the number n passed by the center of the core is 49 steps, equal to 0.25 quantum, is even, i.e. in bit 43, the zero value is entered (, 010,100,110), then element 44 transmits to output 47 the direct code of the intra-step coordinate (the lower bits of the output code of the device). If n is odd, and one is entered into bit 43, then output 47 receives a code inverse contained in register 46, which, as is well known, is equal to an additional one up to the least significant bit. Such an operation is necessary to ensure an increase in the total output code both in the areas of increasing the input signals of the converter -45 and in the areas of decreasing levels of these signals (1/4 T-1/2 T), (3/4 T-T), ( 5 / 2f T-3/2 T) and (7/4 T-2 T).

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Claims (1)

DEVICE FOR CONVERTING MOVEMENTS TO A CODE containing a movable armature, a block of READERS elements connected to the input of the matching unit, the outputs of the coarse reference of which are connected to the coarse reading unit, the output of the exact reference of the matching unit is connected to the exact reading unit, characterized in that, in order to increase accuracy of the device, a switch is inserted into it, the control inputs of which are connected to the outputs of the coarse reference of the matching unit, the information inputs of the switch are connected to the additional outputs exactly matching of the reference block, and an output switch coupled to an input i accurate reading unit. XI44192