SU1557542A2 - Apparatus for converting time intervals to code - Google Patents

Abstract

The invention relates to a measurement technique and can be used when measuring and recording time parameters of pulsed, sinusoidal signals on a magnetic medium. The aim of the invention is to expand the range of convertible intervals. The device contains a generator 1 pulses of the reference frequency, the first counter 2 pulses per N ₁ bits, the output block 3 elements And / N ₁ + N ₂ / bits, the first recalculating circuit 4, the block 5 elements And, the decoder 6, the second counter 7 pulses per N ₂ bits, source 8 read signals. A block 9 specifying the division factor / γ /, a multi-input element 2I-OR 10, a switch 11, a second scaling circuit 12 and a delay line 13 are introduced into the device. Introducing new elements and forming new connections ensures the achievement of the objective of the invention, as well as simplification of the output code, which increases the speed of processing it on a computer. 1 il.

Description

sh

Yu

The invention relates to a measurement technique and can be used in the measurement and recording of temporal parameters of pulsed sinusoidal signals on a magnetic medium.

The purpose of the invention is to expand the range of convertible intervals.

The drawing shows the functional scheme of the device.

The device for converting time intervals into a code contains a generator of 1 pulses of the reference frequency, the first counter 2 at p4 bits, the output block 3 of elements AND (n (+ ng bits, first scaling circuit 4, block 5 of elements AND, the decoder 6, counter 7 per pg bit, read signal source 8, block 9 setting the division factor (y), multi-input element 2I-OR 10, switch AND, second scaling circuit 12 and delay line 13.

The output of the generator of the standard frequency pulses is connected through a switch 11 to the counting input of the first recalculation circuit 4- and to the main frequency input of the block 5 And elements, additional frequency intervals blotg 5 elements And connected to the outputs of the first recalculation circuit 4 output of the block 5 elements And connected to the counting input of the first counter 2, the output of the high bit of which is connected to the counting input of the second counter 7E; the outputs of all bits of which are connected to the additional information inputs of the output block 3 of the elements I and with the inputs of the decoder b, the outputs of the latter are connected to the enabling inputs of the block 5 elements I, the information input of which is connected to the input bus of the device 5 the output of the source 8 of the read signal is connected to the control input of the output block 3 elements I, the main information inputs of which are connected with the outputs of all bits of the first counter 2, the input of the delay line 13 is connected to the output of the higher bit of the first counter 2, and the output to the installation input for setting the initial number of the first counter 2E; output block 9 cient divider coupled to the input for setting the initial number of the first counter 2 and the first inputs of multi-input element 2I IL-10, whose output is connected through

the switch 11 with the counting input of the first scaling circuit 4, and the second inputs with the c-outputs of the second scaling circuit 12, the counting input of the latter is connected to the output of the generator 1 pulses of the reference frequency.

The division factor setting unit 9 can be represented by a switch, a dialer, an input keyboard, or the output of some other computer hardware, etc. Elements 10, 12, and 13 are common types of digital technology. As a switch 11, you can use a normal toggle switch, which provides in position a known method of measuring the time interval of the input signal to the code, and in position b - the proposed one.

The device works as follows. .

Before starting the measurement, a binary code in which only one unit is present is recorded in the block 9 setting of the division factor. If unit 9 in the first discharge is recorded in block 9 of setting the division factor, then the division rate of the frequency of the pulses fed to the first conversion circuit 4 from the multi-input element 2I-YRI 10 will be equal to 2, if the unit is recorded in the next (second) section, then the division ratio will be 4, etc. with growth rate 2.

The measurement starts after zeroing the counters 2 and 1 (the zeroing circuit is not shown in the drawing). The measured signal is fed to the input bus — the information input of block 5 of elements K. Since the counter of the rotor 7 contains only zeroes after zeroing, the decoder 6 generates a signal 1 only at the first output, which through the block 5 of elements I allow the passage of the first counter to the input 2 only pulses from the generator 1 pulses of the reference frequency. The pulses from generator 1 fill the first counter 2. If at the end of the action of the input measured signal the counter 2 does not completely fill, then the code read by it completely corresponds to the duration of the measured signal. If the first counter 2 is completely filled with pulses from generator 1, and the action of the input measured signal continues, then the first counter 2 is naturally zeroed out.

is recorded in the second counter 7,

Yes

simultaneously, delay line 13 is started, which by its output impulse divides the code in the first counter 2, taking into account the unit transferred to the second counter 7 by the division coefficient code, which is in the division factor setting unit 9, which in the binary number system is produced by transferring the unit from block 9 setting the division factor into the first counter 2. Such an introduction of the initial number into the main counter produces an automatic scaling of the output code.

The second counter 7 through the decoder 6 and the block 5 of the elements And delivers to the counting input of the first counter 2 pulses generated by the first scaling circuit 4, the frequency of which is меньше times less than the frequency of the generator 1 pulses of the reference frequency. With this frequency, a new filling of the first counter 2 is performed. Thus, after a duvdck decrease in the frequency of pulses by a factor of 1, a new filling of the main counter 2 is carried out every 4 times in a scoring circuit.

After the measurement is finished (when the measured signal expires) from the readout signal source 8, a control pulse is sent to the control input of the output unit 3 of the elements I, and the contents of the first 2 and second 7 counters are transmitted from this unit to the device output

The digital equivalent of the measured time interval is determined by the equation

.N2

N (TX)

 IVN if

(about

the period of the reference frequency is 1,

T is the discontinuity, Y is the frequency of measurement (decrease) of the frequency between adjacent outputs of the counting circuit 4;

and 2. the numerical value of the codes of the first 2 and third 7 counters, respectively, in decimal value.

When comparing the above equation with the equation of the known device

N "

+0 zlj +

Hit

(2)

i - 1

N,

N (TX)

,

sh

, n / j - the number of bits of the first and second counters, respectively,

This is obviously a simplification, which consists in the exclusion from the equation - (2) of the first term

Hi

(2

P

 Ј W

P2-1

(3)

The use of the proposed device in comparison with the main one allows to increase the efficiency of the device operation by simplifying the output code, which leads to speeding up and simplification when registering, displaying, and entering into the computer when decoding the output digital equivalent of the time parameter of the input signal.

Claims (1)

Invention Formula thirty five 0 Device for converting time slots to auth code St. No. 1007081, characterized in that, in order to expand the range of convertible intervals, a division control unit is introduced, a multi-input element 2I —OR, a switch, a second recalculation circuit and a delay line, the input of which is connected to the high-order output of the first counter, and output — with the installation input for setting the initial number of the first counter; the installation inputs for the initial number of the last are connected to the outputs of the block for setting the division factor and to the first inputs of the multiple-input element 2И-OR, whose output The switch is connected to the counting input of the first scaling circuit, Q and the second inputs - with the outputs of the second scaling circuit, the counting input of which is connected to the output of the pulse generator of the reference frequency.