SU706845A1 - Code comparator - Google Patents

Description

(54) DEVICE FOR COMPARING CODES

- - The invention relates to automation and computing and can be used in automatic processing systems with sensors emitting signals in a unitary code. A device for comparing binary numbers is known, containing registers, adders, elements AND, OR, NOT p., This device compares the numbers found in registers whose number is equal to the number of compared numbers. Comparison of numbers is done by sequential bitwise determination of the largest of its number, starting with the highest time |: 1 and ending with the Younger. A disadvantage of this device is complexity. The closest technical solution to the proposed one is a device for comparing numbers, which contains the trigger elements AND, OR, the generator. Comparison of numbers is provided by the appropriate combination of the named elements and the generator of phase constants L2j. The device is characterized by low noise immunity, since the malfunctions in the codes are comparable; numbers are not. detected. Failure of triggers and. the phase constant generator is not detected, which leads to a distortion of the comparison result. The purpose of the invention is to increase the reliability of the device. The goal is achieved by the fact that in the device for comparing codes containing a generator, counter, trigger, AND-OR, AND-NOT elements, the generator output is connected to the first input of the AND-NOT element, the output of which is connected to the counter input, information inputs are connected with the first inputs of the AND-OR element, the second inputs of which are connected to the counter outputs, and the output of the AND-OR element is connected to the second input of the IS-NOT element, the third input of which is connected to the first control input. The inverse output of the last digit of the counter is connected to the counting input of the trigger, the inverse output of which is controlled by the 7th output of the device, and the input of setting to the zero state of the trigger is connected to the second one in the control unit. and .-. The block diagram of the device shown in the drawing. The device contains an element I-ILY 1, an element AND-NOT 2, counter 3, trigger 4, generator 5, inputs 6, 7 5 directors, control output 8, informational inputs 9. It is intended for operation in devices where it is from 1 to 1 The races are matched by monitors of the unitary code at discrete time intervals. The system tends to make the mismatch of the actual part size from the given one close to zero. At the same time, during the machining of the part, the measurement is not conducted, and the extension of the machining process is performed by the mismatch value remaining after the previous machining cycle. Failures in the system lead to the impossibility to bring the processing of the part to a predetermined size and may even cause emergency ones. f ,,, The device works as follows,. - J. Suppose that with the nOMofflbiq sensor of the unitary code the first measurement was taken and a number was established at the information inputs 9. To write this number to the counter 3 at the input 6 uira; To the input of the element AND-NOT 2, a post is introduced that opens this element. At the same time, if in the counter 3 such a number is, as in the information boom 9, then at the output of the element 1 there is a low potential and the element 2 is closed. If at least in one discharge of the counter 3 and at the information inputs there are different potentials; At the output of the High 1, the potential is high and the signal from the generator 5 enters the jia in the counter of the counter 3 until a fault is reached. The peak is a number equal to the number received at the infbrmatgaunt vkhbdy 9. On E1 on Figger 4 reset by the input signal 7 control. The output potential of Tj iVrepa is suvdt to evaluate the failure of the circuit. :: .-. ,, . .- - / .. After a certain period of time, a new number is displayed on the infcd ycTaHaPv. The control input 6 to the input of element 2 passes through. potential, opening this element. If the numbers in the counter are 3, afterwards

706845 are equal, then the low potential comes from element 1 and element 2 closes. If the numbers are not equal, then the signal from the generator of 5 pulses is applied to the input. chetchika. The counter works on subtraction. With each new impulse, the number written in the counter decreases. When the number written in the counter is passed, trigger 4 is flushed through zero, indicating a failure. Failure is possible both in the input information and the counter. If the failure occurred in the counter and the NUMBER in it became less than the new number in the information inputs, then after opening element 2, the number in the counter decreases to zero, goes through zero, which causes a change in the state of trigger 4, indicating the presence of a failure. If the failure occurred in the input circuit and the new number became greater than that recorded in the Checker, the state of the trigger changes according to the indicated pattern. In case a failure occurred in the counter, but the new number in this counter does not exceed the number on the information inputs, then a new equal number is set, and the trigger state does not change. This kind of failure does not harm the system in question, it is not fixed. If a failure occurred in the input circuit, but the new number became less than that recorded in the counter, then this failure is also not recorded. Such faults reduce the accuracy of part processing, but they do not lead to emergency situations. In order to reduce the effect of such faults, one should follow after reaching zero & L b mismatch over another time First dimension, as indicated. A comparison device for sensors of the unitary code K10 is used as a transducer of the transceiver code into a voltage transducer. To do this, you can write any number & counter and skip counting pulses of g until the moment that the trigger triggers. The number of pulses is equal to the number recorded in the counter in the position code. The device allows to increase the noise immunity of the system with a unitary code sensor. of the invention Formula for Comparison of codes, Conductor: generator, counter, trigger, elements AND-YLI, AND-NOT, generator output connected to the first input of the element AND-NOT, output

which is connected to the input of the counter, characterized in that, with the chain of increasing the reliability of the device, in it the information inputs are connected to the first inputs of the AND-IL element, the second s inputs of which are pct (echen to the estimator's outputs, and the output of the AND-OR connected to the second input of the NAND element, the third input of which is connected to the ttejpfeowy control input, the inverse output pbS-O of the latest discharge of the connection counter to the counting input of the trigger, the inverse sLJ

the stroke of which is connected to the control output of the device, and the setup input to the zero state of the trigger is connected to the second control input.

Sources of information taken into account in the examination

1. Authors certificate of the USSR. No. 155333, class 06 F 7/02, 18 “05.62.

2, USSR Copyright Certificate No. 506019, class Q 06 F 7/04,

05/12/1975 (prototype).

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