SU1224789A1 - Device for measuring time intervals - Google Patents

Abstract

The invention relates to the field of automation and computer technology. It can be used in tachometric devices with a measurement result in a digital code for input into a computer. The purpose of the invention is to increase the speed of the device, ensuring the output of information at the required time points. The device contains a clock pulse generator 1, logic elements (LE) I 2-8, LE I-HE 9 and 10, triggers .11-13, delay elements 14 and 15, counters 16 and 17 with additional bits, switch 18 , information output blocks 19 and 20. The maximum delay in outputting information from the device is equal to the switching time of the trigger 13. 1 slug. (L Input ND to 00 with

Description

The invention relates to automation and computer technology and can be used in tachometric instruments with the output of measurement results in a digital code suitable for input into a digital electronic computing raspberry (computer).

The purpose of the invention is to increase the speed of the device when displaying information due to the possibility of displaying information at any desired time.

The drawing shows a functional diagram of the device.

The device contains a generator of 1 clock pulses, elements AND 2-8, elements AND-NOT 9 and 10, triggers 11-13 delay elements 14 and 15, counters 16 and 17. with additional bits, switch 18, information output blocks 19 and 20 .

The output of the generator 1 clock pulses connected to the first input element And 2, the second input. Which is connected to the output of the trigger I1, the input of which is connected to the input of the device and the inputs of the trigger 12 and the elements 14 and 15 of the delay, the output element And 2 is connected to the first the inputs of the elements 3 and 4, the outputs of which are connected respectively to the counting inputs of the counters 16 and 17, the reset inputs of which are connected to the outputs of the elements 6 and 5 respectively, the first inputs of which are combined and connected to the output of the element 14, the output of the element 15 is connected to the first inputs uh And 7 8, the outputs of which are connected to the control inputs of the information output blocks 19 and 20, the outputs of which are combined into a common bus, the direct output of the trigger 12 is connected to the second inputs of the elements 3 and 5 and the control input of the switch 18, the inverse output of the trigger 12 is connected to the second inputs of the elements 4 and 6, the information inputs of the switch 18 are connected to the outputs of the counters 16 and 17, and the output is connected to the information inputs of the information output blocks 19 and 20, the output of the element 14 is connected to the C input of the trigger 13, K-input which is connected to the polling input unit 2 0 and the output of the element AND-NOT 9, the first input of which is connected to the input of the element AND-NOT 10 and to the device polling input, the J input of the trigger 13 is connected to the input of the probe5

The unit 19 and the output of the element AND-NO 10, the second input of which is connected to the second input of the element 8 and the inverse output of the trigger 13, direct output of the trigger 13 is connected to the second inputs of the elements 7 and II and HE9. A device for measuring time intervals is as follows

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When the device is turned on, the 1-clock pulse generator starts to work. Triggers 12 and 13 are in an arbitrary state. Before the arrival of the first input pulse, the counters 16 and 17 do not work, since the unbalanced trigger 11 is in the zero state and the And 2 element is closed. After the arrival of the first input pulse, the trigger 11 is set to one state, opens the element 2, and depending on the state of the trigger 12, starts counting one of the binary counters 16 and 17.

j The next -h input pulse switches the trigger 12, this stops one counter and starts another. The switch 18 pushes to the information inputs of the information output blocks the code output of the counter not working, which is determined by the state of the trigger 12, namely: when the trigger 12 is in the zero state, the output of the counter 16 is connected to the information inputs of the information output blocks. the delay element 15, the same input pulse passes through one of the elements 7 or 8, depending on which state the trigger 13 is located, and receives the code from the counter into the corresponding information output block 19 or 20. The same pulse delayed by the delay element 14 switches the trigger 13, so that the following code from the counter will be received in another information output unit, and simultaneously through the AND 5 or 6 element it sets the corresponding counter and the additional bit to zero. Thus, when the interpulse interval is measured by one binary counter, from the other, the result of the previous measurement is read into one of the information output units. (Consequently, the counters 16,17 and the information output blocks 19 and 20 work alternately, which allows

measure the time intervals between the pulses forming a continuous sequence,

The issuance of information from blocks 19 and 20 has been described as follows,

Let us assume, for definiteness, that the trigger 13 is in the single state, and the interrogation signal arrives at the moment the code is received from the counter. In this case, the receive pulse will pass through the open element 7 and the code will be received in block 19, and the interrogation signal through the open element AND-HE 9 passes to the control input of the unit 20, information from which will go to the common bus. From the output of the NAND 9 element, the interrogation signal will also be sent to the K input of the trigger 13, thereby blocking it for the duration of the interrogation signal. If the next input pulse arrives before the interrogation signal is removed, the state of the flip-flop 13 will not change and the code will be accepted into the information output unit 19. If the polling signal arrives at the moment of the flip-flop of the flip-flop 13, i.e. when the code from the counter has already been received in the information output unit, the corresponding output unit is determined by the new state of the trigger. Therefore, the maximum delay in outputting information from the device is equal to the switching time of the trigger 13.

Claims (1)

Invention Formula A device for measuring time intervals, containing a clock pulse generator, the output of which is connected to the first input of the first element, And the second input of which is connected to the output of the first trigger, the input of which is connected to the input of the device, to the inputs of the second trigger and the first and second delay elements, output the first element And connect en with the first inputs of the second and third elements And, the outputs of which are connected respectively to the counting Compiled by L. Pletneva Editor I. Slobod nickname Techred I. Veres 25 AND-NOT triggered entry of go groups by the order of entry of the entrance of the course of the flow from the K-input and the first and the first, and J is not output from the output of the first electric to the third third of the third electronic NID. Order 1951/47 Circulation 398 Subscription VNIIPI USSR State Committee for Inventions and Discoveries 113035, Moscow, Zh-35, Rautlska nab. 4/5 Production and printing company, Uzhgorod, st. Project, 4 50 24789 the inputs of the first and second counters with additional bits, the reset inputs of which are connected respectively to the outputs of the fourth and fifth elements And, the first inputs of which are combined and connected to the outputs of the first delay element, the output of the second delay element connected to the first inputs of the sixth and seventh 10 And elements, the outputs of which are connected to the control inputs of the first and second information output units, the outputs of which are combined into a common bus, which is J5 with the output of the device, the direct output of the second trigger is connected to the second inputs of the second and fifth And elements, inverse the output of the second trigger is connected to the second inputs of the third 2Q and the fourth And elements, differing from the fact that, in order to improve the speed at the output of information, a switch, a third trigger and two elements are entered into it 25 AND-NOT, with the direct output of the second trigger connected to the control input of the switch, the first and second groups of information inputs of which are connected respectively to the outputs of the first and second counters with additional bits, the output of the switch is connected to the information inputs of the information output blocks, output the first delay element is connected to the C input of the third trigger, the K input of which is connected to the polling input of the second information output unit and the output of the first NAND element, the first input of which is combined with the first input m of the second element AND-NOT and connected to the polling input of the device, J-input of the third trigger is connected to the polling input of the first information output unit and with the output of the second AND-NOT element, the second input of which is connected to the second input of the seventh element Nick, inverted output of the third trigger, the direct output of which is connected to the second inputs of the sixth element AND and the first element NAND. thirty 35 40 45 Proofreader V. But ha