SU1236533A1 - Device for checking shift of object - Google Patents

Abstract

The invention relates to a measuring technique and can be used in systems for transmitting information about the movement of the executive bodies of machine tools, robots, etc. For operation of the device, a sensor having two channels is used. The direction of movement of the sensor is determined by the sequence of pulses from the first and second channels. To store information about the direction of motion, the device contains a trigger, logic gates And, and pulse shapers in each channel. The proposed device is resistant to the occurrence of information transmission lines from the sensor, which significantly affects its reliability, 4 Il. with "(L 00 ate from 00

Description

one

The invention relates to a measuring technique and can be used in information transfer systems for the movement of the executive bodies of machine tools, robots, automatic lines.

The purpose of the invention is to increase the reliability of the device.

FIG. 1 shows a functional diagram of the device; in fig. - 2- functional diagram of the pulse former; in fig. 3- functional diagram of the delay element; in fig. 4 is a temporary diagram of the operation of the device.

The device (Fig. 1) contains a sensor I, the first trigger 2, the second trigger 3, Iver and the second driver 4 and 5 pulses, the first and second elements And 6 and 7, the first and second elements 8 and 9 of the delay. The pulse shaper (Fig. 2) contains a diode 10, a capacitor 11, the element AND NOT 12, the element And 13.

The delay element (Fig. 3) contains a diode 14, a capacitor 15, the element AND NOT 16.

The device works as follows.

At the start of operation, the first 2 and second 3 triggers can be in an arbitrary state. Upon enrolment

pulse f | on the first channel of the sensor at time tp at the D-input of the first trigger 1 and C-input of the second trigger 3 appears 1. Since in the second channel and this time O on the inverse output of the second trigger 3 appears 1. With the arrival of a pulse the second channel of the sensor to the C input of the first trigger 2 and the D input of the second trigger 3 confirms the state T, 0 and starts the second driver 5 (). As a result of the coincidence on the second element 7 of the coincidence, the impulse passes to the second output of the device, indicating the object is moving forward one unit of discreteness. At the same time, the second delay element 9 is started, the signal O at the output of which leads to O the output of the second trigger 3. When the next pair of pulses arrives through the channels of the examination sensor, the sequence of operations is repeated.

At the time of reversal of the object, the order of the pulses in the first and second channels of the sensor changes:

pulse on the second channel f comes now earlier than the pulse on the first channel f.

When a pulse arrives in the second channel of the sensor f on the D input of the second trigger 3, and the C input of the first trigger 2 appears 1. As in the first channel f (at this moment

ten

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0, then at the inverse output of the first trigger 2, 1 appears. With the arrival of a pulse through the first channel of the sensor fj to the C input of the second trigger 3 and D the input of the first trigger 2, the state T 0 is confirmed and the first driver 4 is started (F1-1). As a result of the coincidence on the first element 6 of the coincidence, the impulse passes to the first output of the device, indicating that the object is moving back one discrete unit. At the same time, the first delay element 8 is started, a short pulse O at the output of which translates the output of the first trigger 25 2 into O. When the next pair of pulses arrives through the sensor channels, the considered sequence of operations repeats.

As follows from the diagram in Fig. 4, if the reversal time comes before the completion of the processing of a full unit of discreteness, this unworked unit is not fixed at the outputs of the device.

Consider further the operation of the device in case of damage to the information transmission channels from the sensor. Let for example at time t, in the first channel

thirty

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45

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the sensor fj us: stupid failure, as a result of which a constant level 1 was established in the channel. As a result, on the inverse outputs of the flip-flops 2 and 3 and the outputs of the device, the signals O are saved. A similar situation characterizes the damage of the second level 1.

If at the time t in the second channel of the sensor f a failure occurred, as a result of which the channel is set to: ovils constant level O, then with the arrival; the pulse on the first channel f the second trigger 3 goes into state 1, but due to the lack of launching the second driver 5, the signals 0. still remain at the outputs of the device. A similar situation characterizes damage to the first channel f, when set to

It is a constant level O. The device is implemented on standard microcircuits, for example, series 155. Thus, compared with the known, the present invention provides a more reliable transmission of information about the position of an object, since it eliminates the possibility of simultaneous appearance of pulses on two outputs of the device at the time of reversal the appearance of information at the output of the device in case of damage to the channels of the pulse sensor ensures that the duration of the output pulses is independent of the frequency of rotation of the pulse Occupancy ..

The introduction of the device contributes to the safety of industrial installations, their accuracy and performance.

Claims (1)

Invention Formula A device for controlling the movement of an object containing a sensor, the first 25 and second outputs of which are connected respectively to the information and synchronization inputs of the first trigger five 0 Hera, the inverse output of which is connected to the first input of the first element I, and the second element I. The outputs of the first and second elements I are the first and second outputs of the device, respectively, characterized in that, in order to increase the reliability of the device, pulse shapers, elements delay | Ki and the second trigger; the first output of the sensor is connected to the synchronizing input of the second trigger and the input of the first pulse generator, the output of which is connected to the second input of the first element And, the output of the first element And The first delay element is connected to the setup output of the first trigger, the second sensor output is connected to the information input of the second trigger and the input of the second pulse generator, the inverse output of the second trigger and the output of the second pulse generator, respectively, are connected to the first and second inputs of the second element, whose output is through the second the delay element is connected to the installation input of the second trigger. FIG. f Fa g Phage.Z t Reverse Peffe / j Fy CSounoff failure nof2