SU1168957A1 - Information input device - Google Patents

Abstract

A DEVICE FOR INPUTING INFORMATION, containing a timer, two registers, two triggers, a memory, a divider, a switch block, a counter, three AND elements, two OR elements, a switch, a delay element, a NOT element, characterized in that, in order to increase the reliability, A decoder, two pulse drivers, an OR element are entered into it, and the information input of the device through the first element I is connected to the counter input of the counter, the output of which is connected through the decoder directly and through the element NOT to the inputs of the first trigger, the output cat which is connected to the information inputs of the divider and the first register, the output of which is connected to the information input of the counter, the first output of the switch block through the divider and the second output of the switch block, is directly connected to the information input of the second register through a timer connected to the inputs of the first element AND and the first element OR, the outputs of which and the second element OR are connected to the inputs of the second trigger, the outputs of which with Connected to the inputs of the first and second pulse shapers, the output of the first pulse shaper is connected to the input of the first trigger, pulse counter input and through the delay element with control, it timer input, the output of the second pulse shaper through the third element OR is connected to the control memory input triggering the device input through the second element AND is connected (L to the input of the second element OR, the measurement input of the device is connected to the input of the switch and through the third element AND to the input of the second element OR, The device configuration input is connected to the input of the second element AND, the switch outputs are connected to the input of the third element OR, the control inputs of the first and second registers, deO5, to the input of the first element AND and syn00 with SP clock inputs of the memory, counter and first register.

Description

The invention relates to specialized computing devices and can be used in information and measurement systems for communicating objects with digital computers.

The purpose of the invention is to increase credibility.

FIG. 1 and 2 are block diagrams of the device.

The device contains a timer 1, a counter 2, a memory 3, a block of 4 switches, a switch 5, a divider b, a decoder 7, registers 8 and 9, triggers 10 and 11, elements OR 12-14, elements 15-17, drivers 18 and 19 pulses, NOT element 20, delay element 21.

The device works as follows.

Before the start of the measurement cycle, the switch sets up the Setup mode and the device is manually calibrated in the following order.

The contents of register 8, counter 2, and memory 3 are reset. Register 9 contains the number corresponding to the measurement time interval, which is taken as 1 s for calibration, and entered into register 9 c of block 4 via switch 5. Timer 1 is started, which allows impulses frequency sensor in counter 2 through the first element And 15.

The mode of operation of counter 2 using trigger 10 and the element 20 does not depend on the content of counter 2 according to the readings of the decoder 7. If the contents of the counter are zero, the trigger 10 is set to one, which corresponds to the direct counting mode.

After the end of the counting time, the number recorded in the counter is equal to Tofo, where To is the initial measurement interval — the time during which the frequency sensor pulses arrive at the input of the counter; fo is the initial frequency of the sensor at, x is the measured value.

The timer 1 is restarted, which during the same time then allows the fma frequency pulses to arrive at the counter 2, which operates in the subtraction mode. As a result, the content of the counter 2 is equal to

No To {fo-fma; c),

where imax is the value of the output frequency of the sensor at.

In those cases when the decoder 7 captures the moment when the contents of counter 2 equals zero, and the trigger 10 is reset by its signal. The zero state of trigger 10 sets the forward count of counter 2. Thus, in the counter, the recorded number corresponding to the numeric the equivalent of measured value X, and the final state of trigger 10 shows the sign of the result.

The number NO is stored in memory 3. If, due to a change in the characteristic of the sensor, the obtained numerical equivalent does not correspond to the required one, then it is corrected by setting another measurement time interval Tc, which can be calculated by the formula:

N-TO

N.

where N is the required value of the numeric equivalent.

Since a time unit of 1 s was chosen for That, the calculation is reduced to the calculation of the N / NO ratio. This calculation is performed by divisor 6. The number N is entered in the divider from block 4.

The calculated numerical equivalent of the time interval Tc is stored in register 9, and then the counter 2 counts and stores in the register 8 the number of Tufo.

Switch 5 sets the “Measurement” mode. The signal "External triggering through the elements AND 16, OR 13, the trigger 11 and the driver 19 before each counting of pulses of unknown frequency in the counter 2 records the contents of the register 8.

The measurement result is: N.T4 (fo-f.) L, where L is the value of the unknown frequency.

The measurement mode is set by the switch 5. Having received the signal "External start, the contents of register 8 are entered into counter 2, timer I is started. If the signal of the decoder 7 arrives at T", the operating mode of counter 2 switches. At the end of the measurement time, the contents of counter 2 are written to th 3.

Trigger 11, elements OR 13 and 14, driver 18, switch 5, elements AND 16 and 17 are used to control memory 3.

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Claims (1)

INFORMATION INPUT DEVICE, comprising a timer, two registers, two triggers, a memory, a divider, a switch block, a counter, three AND elements, two OR elements, a switch, a delay element, an NOT element, characterized in that, in order to increase the reliability, a decoder, two pulse shapers, an OR element are introduced to it, and the information input of the device through the first AND element is connected to the counting input of the counter, the output of which through the decoder is connected directly and through the element NOT to the inputs of the first trigger, the output of which is connected to the counter reset input, the output of which through memory is connected to the information inputs of the divider and the first register, the output of which is connected to the information input of the counter, the first output of the switch block through the divider and the second output of the switch block are directly connected to the information input of the second register, the output of which is through the timer connected to the inputs of the first AND element and the first OR element, the outputs of which and the second OR element are connected to the inputs of the second trigger, the outputs of which are connected to rows of first and second pulse generators, the output of the first pulse shaper connected to the input of the first trigger pulse and the counter reset input via a delay element with the control input of the timer, a second pulse shaper output through the third OR gate is connected to _a controlled-governing memory access, a trigger input < g of the device through the second AND element is connected to the input of the second OR element, the measurement input of the device is connected to the input of the switch and through the third AND element to the input of the second OR element, the setup input oystva connected to the input of the second AND gate, the switch outputs are connected to the input of the third OR gate, the control inputs of the first and second registers, a divider, to an input of the first AND gate and synchronizes the memory inputs of the counter and the first register. SU, „, 1168957