SU1171663A1 - Phase-type great displacement digital indication device - Google Patents

Abstract

A DIGITAL INDICATION DEVICE OF LARGE PHASE TYPE DISPLACEMENTS, containing a pulse generator, the output of which is connected to the first input of the first comparison circuit and through a divider to the input of the first read photo head of the converter, the output of which is connected to the second input of the first comparison circuit, a reversible counter, characterized by the same output, which is connected to the second input of the first comparison circuit, a reversible counter, characterized by the same output, which is connected to the second input of the first comparison circuit, is a reversible counter, characterized by themes, a reversible counter, the output of which is connected to the second input of the first comparison circuit, a reversible counter, which differs in the output of which is connected to the second input of the first comparison circuit, a reversible counter, which differs in the output of which is connected to the second input of the first comparison circuit, a reversible counter, which differs in the output of which is connected to the second input of the first comparison circuit, a reversible counter, characterized by themes, which is connected to the second input of the first comparison circuit, a reversible counter, which differs in the output circuit of the converter; the purpose of expanding the magnitude of the controlled movement while maintaining measurement accuracy, it contains a second readable photo head, the input of which is connected to the output of the dividers, and the output - with the second input of the second comparison circuit, the first input of which is connected to the output of the pulse generator, the signal analyzer of the photo heads, the first input of which is connected to the information output of the first comparison circuit, the second input to the information output of the second comparison circuit, and the output to the control input of the switching circuit, The first and second outputs of which are connected to the first and second inputs of the reversible counter, the first and second inputs of the switching circuit being connected to the first and second outputs & the first comparison circuit, and the third (L and the fourth with the first and second outputs of the second comparison circuit. Move / e, Poll

Description

Oi O5

with

The invention relates to the field of automation and computer technology and is intended to measure and digitally indicate large movements of the working bodies of the machine, measuring machines and other technological equipment.

The aim of the invention is to expand the magnitude of the controlled movement while maintaining measurement accuracy.

FIG. 1 shows a block diagram of the proposed device; in fig. 2- time diagram, as shown, and his work.

The device contains a pulse generator 1, the output of which is connected to the input of the divider 2, the output of which is connected to the input of the converter 3, the outputs of the first 4 and second 5 reading photo heads of which are connected to the second inputs of the first 6 and second 7 comparison circuits, whose information outputs are connected to a signal analyzer photo heads 8, the output of which is connected through a switching circuit 9 with a reversible counter 10.

The device of digital indication of the phase type movement is built in a closed circuit and its operation is based on the compensation of the input phase shift of the converter by signals of the master oscillator, and switching from one photo head to another in the process of moving is performed at the moment when there are no adjustment pulses at the outputs of both comparison circuits by the signal produced signal analyzer photo heads and incoming to the switching circuit.

The device works as follows.

If the photo-head 4 is in conjunction with the measuring line of the converter 3 and their relative displacement is zero (tt 0), then the phase of the interrogation signal formed by the device divider 2 coincides with the phase of the photo-head signal (Fig. 2b). In this case, the phase of the adjusting signal (Fig. 2c) will coincide with the phase of the photohead signal and on both outputs of the comparison circuit 6, the adjustment pulses will be absent. If the relative displacement of the measuring ruler and photo head at time Tg occurs, a time interval t2 appears between the positive edge of the Poll signal and the photohead signal SF1, filled with generator 1 pulses of frequency F. Depending on the direction of movement, the tuning pulses of IP1 (Fig. 2 g) ) are fed to one of the information outputs of the comparison circuit 6 and through the switching circuit 9 to one of the inputs of the reversible counter 10. If at time Ta the second photo head 5 of the converter mates with If the length of the trimming signal SP2 (Fig. 2e), formed by comparison circuit 7, differs from the duration of the trimming pulse SP1 (Fig. 2c), at the identical information output of the comparison circuit 7, the number of pulses Pne is equal to nj. The signal analyzer of the photo heads 8 does not generate a command connection signal and the input of the reversible counter 10 will continue to receive pulses from the information output of the comparison circuit 6.

At time Tj, both photo heads of the transducer are fully mated with the measuring ruler. The identical outputs of the comparison circuits 6 and 7 produce the same number of adjustment pulses equal to n, however the switching circuit is in the same state and the output of the comparison circuit 6 continues to be fed to the input of the reversible counter. Since the durations of the TSP1 and TSP2 adjustment pulses in this position become the same, the signal analyzer of the photo-heads 8 with a delay relative to their negative front produces a command connection pulse (Fig. 2k), which arrives at the control input of the switching circuit.

On the command front of the command switching pulse, the connection circuit operates and connects the information outputs of the comparison circuit 7 to its outputs. Since the switching took place at the moment when there were no adjustment pulses at the outputs of both comparison circuits 6 and 7, there is no additional error in registering the magnitude of the displacement.

In the future, when moving in the same direction, adjustment pulses from the outputs of the adjustment circuit 7 will be sent to the input of the reversible counter.

The operation of the device when moving to the other side is similar and with repeated switchings there will be no additional error introduced. The principle of construction of the proposed device does not impair the dynamic characteristics of phase-type displacement devices operating with one photohead, since the period of no adjustment pulses is determined by the division factor of divider 2 (the interpolation value of bitmap) and differs from the pulse generation period of the generator by several orders of magnitude.

Claims (1)

DEVICE FOR DIGITAL INDICATION OF LARGE PHASES MOVEMENTS OF PHASE TYPE, containing a pulse generator, the output of which is connected to the first input of the first comparison circuit and through a divider with the input of the first readout photo head of the converter, the output of which is connected to the second input of the first comparison circuit, a reversible counter, characterized in that, with In order to expand the controlled movement while maintaining the measurement accuracy, it contains a second readout photo head, the input of which is connected to the output of the divider, and the output is connected to the second the input of the second comparison circuit, the first input of which is connected to the output of the pulse generator, a photohead signal analyzer, the first input of which is connected to the information output of the first comparison circuit, the second input is with the information output of the second comparison circuit, and the output is with the control input of the switching circuit, the first and the second outputs of which are connected to the first and second inputs of the reversible counter, the first and second inputs of the switching circuit connected to the first and second outputs of the first comparison circuit, and the third and fourth - with the first and second outputs of the second comparison circuit.