SU545998A1 - Angular displacement transducer to code - Google Patents

Description

one

The invention relates to a measuring technique and can be used as an analog-to-digital converter in systems for monitoring and controlling technological parameters.

{1;;: a transducer of information on the angular displacement of a shaft containing pulse shapers, a synchronization unit, generators of close frequencies, an electronic key, and a pulse counter flj The disadvantage of the known transducer is low accuracy and speed.

The closest in technical essence to the subject is an angular displacement transducer into a code containing a pulse generator, the output of which is connected to the input of a frequency divider and the first input of a key element, the second input of which through a chain of serially connected pulse former, the phase shifter to the feed voltage connected to the output of the frequency divider, the output of the key element is connected to one input of counter 2,

However, the 1-1st converter also does not provide sufficient speed.

The purpose of the invention is to increase the speed of the converter. This is achieved by introducing a matching element, a controlled generator, a synchronization unit and an additional key element, whose inputs are connected respectively to the output of the pulse generator, to one group of outputs of the frequency divider and to the first output of the synchronization unit, the first input of which is connected to another a group of outputs of the frequency divider, the second input of the synchronization unit is connected to the output of the pulse generator, the second output of the synchronization unit is connected to another input of the output output pulse counter through a controlled generator connected to the first input of the match element, the second input of which is connected to the output of the pulse generator, the output of the match element is connected to the third input of the key element.

Claims (2)

FIG. 1 shows a functional diagram of the transducer of angular displacements in the code; in fig. 2 - diagram of the operation of blocks of the converter by the reading method; FIG. 3 is a diagram of operation of blocks performing the formation of low order code bits. The converter contains a pulse generator 1, a frequency divider 2, the input of which is connected to generator 1, and the outputs to the driver voltage supply 3, to key element 4 and to the –synchronization unit 5. The output of the voltage driver 3 is connected to the phase shifter 6, the output of which connected to the input of the pulse driver 7. The output of the driver 7 is connected to the synchronization unit 5, controlled by the generator 8 and to the controlled key element 9. The outputs of the synchronization unit 5 are connected to the key element 4 and the counter 10, the second turn is connected to the output of the controlled key element 9. By the input member 11 connected coincidence outputs the pulse generator 1 and the controlled oscillator 8, and the coincidence output element connected to a key element 9, to which is connected the output of the generator 1. In FIG. 2 shows diagrams for the operation of the converter blocks by the read method, where Uj is the signal from the reference rsiHepaTopa pulse Ij Ug-intermediate output of the frequency divider; U is the output signal of the frequency divider, corresponding to the most significant bit of the code and determining the frequency of the supply voltage of the phase-shifter sensor, and, consequently, the frequency of its output signal ITg U 7 -signal at the output of the pulse shaper 7, which forms the voltage drop at the moment of transition signal through the ground potential, i.e. locking phase V-x of signal 17 relative to signal Ug, by Signal Ui through synchronization unit 5, key element 4, combination of signals U, U. Determining code (fx with discreteness nS equal to half the period of the signal U; is fed to the output of the converter. At that, the synchronization unit 5 eliminates the uncertainty in the signal combination, and if the front of the signal U coincides with the froth of one or several signals U, U and the formation of the low-order bits of the fx code that determines the minimum discreteness of the control system is explained by the diagram in Fig. 3, where Ug is the signal from the pulse generator 1 at the input of the controlled key element 9; TJy signal from the pulse generator 7; Ug signal at the output of the controlled generator 8; Ujj is the signal at the output of the coincidence element 11. The front of the signal U triggers a controlled oscillator 8 whose frequency f is selected from the relation I. Where ID is the frequency of the pulse generator 1; is an integer that determines the maximum code value of the least significant bits (for the convenience of matching the major and minor bits is recommended to be chosen as a multiple of the base of the received numbering system), the 1/7 Signal removes the prohibition from the key element 9, and the pulses from the generator 1 are able to pass to the input of the counter 10. The pulse count of the generator 1 prod lzhaets until t. those. until the element fixes the coincidence 11 of the first largest coincidence in time of the positive pulses of the generators 1 and 8. At the time t. the counter 10 will record two, which is the code equivalent of the fx phase of the signal Uy relative to the signal from the pulse generator 1, with a resolution that is proportional to the required resolution cf. Thus, due to the introduction of new elements and the connections between them, the angular mixing driver in the code has a higher speed. Claims The converter of angular displacements into a code containing a pulse generator, the output of which is connected to the input of a frequency divider and the first input of a key element, the second input of which is connected through a chain of series-connected pulse former, phase shifter and supply voltage driver, output The key element is connected to one counter input, characterized in that, in order to increase the speed of the converter, an element of coincidence is introduced into it. controlled oscillator, synchronization unit and additional key element whose inputs are connected respectively to the output of the pulse generator, to one group of outputs of the frequency divider and to the first output of the synchronization unit, the first input of which is connected to another group of outputs of the frequency divider, the second input of the synchronization unit is connected to the output of the pulse shaper, the second output of the synchronization unit is connected to another input of the counter, the output of the pulse shaper is connected to the first electrical input via a controlled generator ment coincidence, the second input of which is connected to the output of the pulse generator, coincidence output element connected to the input key element. Sources of information taken into consideration during the examination: 1. PP Ornatsky. Automatic measurements and instruments. Kiev, Visha School, 1971, p. 419. 2. Zverev A.E. and others. Converters of angular displacements in a digital code. L., Energie, 1974, p. 154.