SU1167732A1 - Device for indicating reading matching of multireading displacement encoder - Google Patents

Abstract

DEVICE DISPLAY AGREEMENT counts MNOGOOTSCHETNOGO transducer to the code comprising a pulse shaper whose input is connected to the output of the sensor MSB coarse reference mnogoschetnogo transducer to the code, a code converter, whose inputs are connected to the outputs of sensing elements accurate reference transducer to the code register , a key block, characterized in that, in order to increase the accuracy of the device, the first, second and third blocks are entered into it and indications, a comparator unit and a switch unit, the input of the first indication unit is connected to the output of the sensitive element of the higher bit of a rough count of the multi-dimensional displacement transducer to the code, the output of the pulse driver is connected to the control input of the register, the outputs of the code converter are connected to the first group of inputs of the switch unit and with the information inputs of the second display unit, the key block and the register, the outputs of which are connected to the first group of inputs of the comparison block, the outputs of the key block They are connected with the second group of inputs of the switch block, the outputs of which (A are connected to the second group of inputs of the comparison unit, the output of which is connected to the input of the third display unit.

Description

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The invention relates to analog-to-digital conversion of information and can be used in multi-offset motion to code converters for indicating sample matching when tuning converters.

A device is known for matching the samples of the multi-displacement transducer to a code containing alternating voltage-to-constant transducers, a matching unit, a memory register, a threshold element, and an amplifier 1.

The disadvantage of this device is low accuracy.

The closest to the technical essence and the achieved effect to the proposed is a device for matching the counts of the multiscale displacement transducer into a code containing a pulse shaper, the input of which is connected to the output of the sensitive element of the high bit of the coarse counting of the multidigit displacement transducer into the code, the code transformer, whose inputs are connected to output m of sensitive elements of an accurate reference of a multi-dimensional displacement transducer to a code, register, key block, as well as generator, a source of supply voltage, the synchronization blocks, or elements, and triggers the correction unit 2.

The disadvantage of this device is also low accuracy when matching the readings of the Converter.

The purpose of the invention is to improve the accuracy of the device.

The goal is achieved by the fact that in the display device the matching of samples of the multi-displacement transducer to the code contains a pulse shaper, whose input is connected to the output of the sensitive element of the high-order coarse reference of the multi-square transducer to the code, the code transducer whose inputs are connected to the outputs of the sensitive elements the reference of the multi-dimensional displacement transducer into the code, register, key block, the first, second and third blocks of indication are entered , the comparison unit and the switch unit, the input of the first display unit is connected to the output of the sensitive element of the higher bit of the rough count of the multi-position displacement transducer to the code, the output of the pulse generator is connected to the control input of the register, the outputs of the code converter are connected to the first group of inputs of the switch block and to the information the inputs of the second display unit, the key unit and the register, the outputs of which are connected to the first group of inputs of the comparison unit, the outputs of the key unit are connected to the second g The group of inputs of the switch block whose outputs are connected to the second group of inputs of the comparator block whose output is connected to the input of the third display block.

The drawing shows a block diagram of the device.

The circuit contains a shaft angle converter 1 into a code that contains precision reference tracks 2, precise reference sensitive elements 3, controllable unit 4, gear 5, rough reference 6 tracks, sensitive elements 7, and senior high sensitive element 8 of a rough reference.

The controllable unit 4 can be performed, for example, in the form of a locking screw or any other fixing device, by means of which the precise reading tracks 2 and the input shaft of the gearbox 5 can be in a connected or disconnected state. The device includes a code converter 9, display units 10, 11, pulse generator 12, register 13, key block 14, switch block 15, comparison block 16, display block 17.

Pulse generator 12 can be performed on half-adders (elements of logical addition modulo 2). The former 12 generates a pulse at the output when the signal at the output of the sensitive element 8 of the highest coarse count from one to zero changes.

The device works in the following way.

Depending on the value of the angle φ of matching the counts of the transforms in block 15, the switches for setting the value of the angle φ of the matching are shifted to position b in the b bits (starting from the oldest). The remaining switches are in position a. When setting the value of the matching angle, i.e., only the high-order switch of the block of 15 switches should be moved to the position b.

In the connected state of the controlled unit 4, the precise counting tracks 2 are rotated in the direction of increasing the code so that during the transfer of movement through the reducer 5, the rough counting tracks 6 are set to the zero position. In this case, at the output of the sensitive element 8 of the higher discharge of the coarse readout, the signal changes from one to zero (see table), which is fixed by the indicator 11 of the coder’s older discharge code of the coarse readout, while the output of the driver 12 produces a pulse arriving at the control input register 13. The information recorded in register 13 is not significant at this stage. Next, the control unit 4 separates the shaft of the accurate counting tracks 2 and the input shaft of the gearbox 5. Precise reference tracks 2 are turned in the direction of the code increase until the exact counting code 0100 ... 00 appears in the display unit 10, which corresponds to the matching angle. For the case of a pyramid code converter converting angle (corresponds to code 01000. Managed unit 4

connect the coarse and accurate track tracks and by turning the track 2 track in the opposite direction (in the direction of code control), a single signal appears in block 11, i.e. there is a single signal at the output of the high-resolution sensitive element 8 of the coarse count, which corresponds to the installation of tracks 6 of a rough zero count. Further, to check the correctness of the display of the angle φ, the readout of the readings turns the exact readout tracks 2 in the direction of increasing the code and, according to the indication of the display unit 11, of the signal transition at the output of the sensitive element 8 of the highest coarse count from unit to zero, which corresponds to the zero position of the coarse counting tracks. . In this case, the output of the imaging unit 12 generates a pulse arriving at the control, i, input of the register 13, the information inputs of which receive information from all bits of the code converter 9. Thus, in register 13, a binary number is recorded corresponding to the true angle of matching the coarse and precise read tracks. If, then in block 10 of the display the code 01000 is displayed, which indicates that the matching angle φ is set with the accuracy of the least significant bit of the exact reading. However, the angle φ at this stage is almost always greater than the specified angle φ. Let, for example, the angle φ corresponds to the usual binary code 01011, which differs from the required matching angle of the samples, which corresponds to the value of the ordinary binary code 01000. Therefore, when the matching angle was set at the previous stage, an error occurred, which for example corresponds to the three gradations of the ordinary binary code accurate reading from the moment of occurrence of the code 01000 corresponding to the matching angle. Thus, due to the error Δf arising in the process of matching the readings, the value of the angle Φ is different from the required one. To compensate for this error, it is necessary to set the angle φ of the agreement, equal not f, but f-Df. In this case, the error of Df arising in the process of tuning will be compensated, that is, f (f-Df). In this example, the transition to three gradations of an ordinary binary code from the moment code 01000 appears in the direction of decreasing code (f-Df) will correspond to code 00100, the bit values of which, except the senior, are inverse to the code bit values (f + Df).

To set the angle (f-Df), the control unit 4 disconnects the tracks 2 of the exact count and the input shaft of the gearbox 5. The tracks 2 of the exact count turn in the direction of decreasing the code until the signal appears at the input of the matching angle setting display unit 17. At this moment, the previously recorded binary code corresponding to the angle f + Df is fed to one input of block 16 of comparison with the outputs of register 13, and the other inputs of block 16 of comparison from the outputs of switch block 15 are fed the direct value of the higher bit and the inverse values of the remaining bits code corresponding to the current value of the angle f-Df. When the codes corresponding to the inputs of the comparator unit 16 are bit-matched, a single signal is generated at its output, which is fed to the input of the matching installation indication unit 17. Next, control unit 4 connects the counts. In this case, tracks 2 and 6, respectively, of the exact and coarse readings will be set to the required matching angle φ (in the example) with an accuracy of one less than the exact readout.

The elimination of sampling error in the proposed device as compared with the prototype is carried out in fewer tuning steps, which makes it possible to increase the accuracy of the device as a whole.

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Claims (1)

DEVICE FOR INDICATING AGREEMENT OF REPORTS OF A MULTI-COUNTER MOVING CONVERTER TO A CODE containing a pulse shaper whose input is connected to the output of the high-order sensor of the coarse count of a multi-count moving transducer to a code, a code converter whose inputs are connected to the outputs of the sensitive sensor of the exact register block of keys, characterized in that, in order to improve the accuracy of the device, the first, second and third ind cations, comparison block and switch block, the input of the first indication block is connected to the output of the high-order sensitive element of the coarse reference of the multi-count translator to code, the output of the pulse shaper is connected to the control input of the register, the outputs of the code converter are connected to the first group of inputs of the switch block and to information inputs the second display unit, the key and register block, the outputs of which are connected to the first group of inputs of the comparison unit, the outputs of the key block are connected to the second group input switch block, the outputs of which are connected to the second group of inputs of the comparator, whose output is connected to the input of the third display unit.