SU736050A1 - Device for measuring displacements in programme-control systems - Google Patents

Description

The invention relates to measuring equipment, in particular, devices for measuring linear and angular displacements having an indication, and can be used in software systems using meta-processing tools. A device for measuring displacements in software systems containing displacement sensors connected to a conversion circuit is known in which correction sensors l are introduced to improve positioning accuracy. The closest technical solution to this invention is a device for measuring displacements containing two identical control channels consisting of a program input unit, a control unit, a coordinate actuator, a displacement transducer, a transducer, a phase shifter pulse generator, and a reversible counter. correction sensor and phase detector f 2. The disadvantage of the device is the use of sensors for correction systems mechanically or informationally associated with the coordinate table, applicable only to a specific type of equipment, the manufacture of which is individual for certain displacement sensors. In addition, the magnitude of the accumulated systematic error varies over time, leading to a loss of accuracy and the need for additional adjustment. The purpose of the inventions is to simplify and expand the field of application of devices for measuring movement in software control systems while maintaining a predetermined accuracy. The goal is achieved by the fact that a software control device containing a displacement sensor connected by information outputs to the inputs of a signal generator and a displacement sign, and 1 set; connected to the main peEiepcHB counter, the first decoder and display unit, the second input is connected C the first output of the logic block, the pulse generator formerly connected, an additional reversible counter, the second decoder, the switching unit and the correction unit inputs to the signal generator of the magnitude and sign of the displacement signal and to the inputs of the additional reversible counter, information inputs to the inputs of the suspected counter, and significant output to the second input of the lution unit, the inputs of the immersion driver are connected to the installation outputs of the displacement sensor, and outputs - with the installation inputs of the main and additional reversible. counters and with the third input of the display unit.

FIG. 1 shows a functional diagram of the device; in fig. 2 the dependence of the magnitude of the systematic error on the displacement along the X coordinate. The device for measuring the displacements contains a displacement sensor I, a generator of 2 signals of magnitude and sign of the displacement, a logical unit -3, a generator of 4 pulses, a correction unit S, a block b KOMMyTamnij / second decoder, additional reversible counter 8, the main reversible counter 9, the first decoder 1O, block 11 of the display.

The device works in the following way.

When moving the sensor 1 fop fyryuyuschiy nodes that are included in its composition, two sequences of periodic signals F1 and F2, having phase shift T / 4, signal FZ, having phase shift 5 / 8Т relative to Ф 1 and signal R 1 , not synchronized, in general, with the rest, signals. The signals fn F2 are converted by the shaper 2 of the signal of magnitude and sign of the displacement into the counting pulses H and the signal of the direction of the counting direction U of the counter. 8. From the signals of the FZ and R 1 shaper 4, the pulses of setting slr R2 and R3 counters 8 and 9 are automatically generated. The shaper 4 pulses can detect the zero point of the main reversing switch 9 at an arbitrary coordinate point.

The systematic error of the sensor I is automatically compensated by means of the corresponding correction of the counter 9. If on a certain segment of the coordinate the systematic error is constant

Ul-ao const

then by shifting the origin of the counter 9 to the point -cVsign Ld, we reduce the error on the segment to the value / l-8 /.

Since the systematic error g in the general case is an inconstant function of the X coordinate; A L (x), then the offset of the counter 9 also varies depending on X: (5 in {x). An error with this is given by the difference A l (x) - and (x). It should be noted that the correction of the account is made only by the discpeTjT-o value equal to the unit of the account Avc4

 In order to correct the systematic error of the displacement transducer without using an additional correction transducer, it is necessary to solve the approximation problem (functions l (x) using a piecewise constant function c5 (x) having jumps at the break points equal to + ASChfunction c (x) It is easily constructed from a given graphical function of the systematic g (x). In Fig. 2, the graph of the function C (x) is shown for the error function & (x) approximating the function DL1. X with an error not exceeding 1/2,. According to the constructed function (x), the correction points are determined) (- (X X-, p n Sending corrective action.

, To obtain a correction permission signal at the point of the Tszvkhody of the 5th interrupted unit 5, the switching unit 6 is programmed to the corresponding outputs of the decoder 7. The correction permission signal is formed with an accuracy of up to one and the AFM

Correction Eelok 5 generates the signals of the sign of the correction effect of the HF / and the signals of the magnitude of the correction effect N for controlling the UN reversible counter 9. The potential outputs of the counter U through the decoder 10 are connected to the display unit 11.

The direction of the corrective action at the correction point (positive or negative) is selected based on the nature of the change in the systematic error x. (X). Moreover, when datum 1 passes the correction point X. on the left, to the right, a command is given to shift the reference point of counter 9 by the value - © (/ - Ds. And when passing the point) from right to left, the command is given to shift the reference point by + 0 kAsch, where vi, if A (X) decreases at point XK - 1, if A (X) increases at point Xi. Thus, the considered scheme of forming a corrective action allows one to compensate for an arbitrary systematic error by generating a resolution signal at an arbitrary correction point and arbitrarily specifying the direction of the corrective action. In many cases encountered in practice, when working on digital reading devices, it is necessary to have an arbitrary reference point. For this purpose, the device provides for an arbitrary setting of the origin point and logical block 3 is entered. The principle of operation of block 3 is that when going through the point chosen for the origin from right to left is the signal of the 4V mark sign inverts c. / When working to measure the permeability of a village with an arbitrary setting of the beginning of otkhchet correction points X, ..., -X are determined as in the case considered in FIG. 2. Thus, this device for measuring movements in software control systems allows correction at arbitrary points of coordination, has wide possibilities for programming corrective actions, which ensures expansion of the technological possibilities of adjustment and their application. 50 3 about b ra m Formula e Device for measuring displacements in software control systems containing a displacement transducer connected by information outputs to the input of the signal generator of the magnitude and sign of the displacement, and the main reversible counter, the first decoder and the display unit, the second input which is connected to the first output of the logic unit, characterized in that, in order to simplify and expand the field of application of the device, sequentially connected pulses, an additional reversible counter, a second decoder, a switching unit and a correction unit connected by second inputs to the outputs of the signal generator of the magnitude and sign of the movement and to the inputs of the additional reversible counter, information inputs to the inputs of the main reversing counter, and a sign output to the second input the switching unit, the inputs of the pulse shaper are connected to the installation outputs of the displacement sensor, and the outputs to the installation and the inputs of the main and additional reversing account and with the third input of the display unit. Sources of information taken into account in the examination I. V. Kiselev. Phase systems for numerical control of machine tools. M., Mechanical Engineering, 1976, p. 61. 2. USSR author's certificate NO 47О793, cl. G OS 19/32, 1972 (prototype).

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Claims (1)

Claim A device for measuring displacements in software control systems comprising a displacement sensor connected by information outputs to the inputs of a signal conditioner of a magnitude and sign of displacement, and serially connected to a main reversing counter, a first decoder and an indication unit, the second input of which | connected to the first output of the logical unit, characterized in that, in order to simplify and expand the scope of application of the device, sequentially connected pulse shaper, an additional reverse counter, a second decoder, a switching unit 1? switching and a correction unit connected by the second inputs to the outputs of the shaper displacement signal magnitude and the sign and to the inputs of the additional up-down counter, inputs information _hours - to the inputs of the ground down counter and iconic output - to a second input b no time switching, the inputs of the pulse outputs are connected to the mounting displacement sensor and outputs - with setting inputs of the main and additional down counter and to the third input of the indication unit.