RU1380449C - Method of measuring coefficient of filling of pulse signal - Google Patents

Abstract

The invention can be used to measure the ratio of the burn time of the warning lamps to the switching period in the diagnosis of direction indicators for vehicles. The purpose of the invention is to improve measurement accuracy and ease of use. The device contains blocks 1 and an increase in the leading and trailing edges of the pulse, a trigger 6, an integrator 11 and a recorder 13. To achieve the goal, elements And 3 ... 5, triggers 7 and 8, e., Element OR 9, delay element 10, sample element 12 are introduced -storage, potentiometer 14, keys 15, .. 17 and new functional connections are formed, 1 ill. s (L

Description

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And irf pr gigiir concerns and: (measurements of IIlr m -1 pulses and ms1 can be used- 1 (part 1.t (a rip for measuring the ratio of nuii MpHii to the signal lamps to the periol time when diagnosing the indicated speed of vehicles n ridiculous conditions and x and at the stations of technicians with whom the debris en,

The chain of the Invention provides improved measurement accuracy and convenience to the 3KcmvaTai iTM.

 a drawing of a nrineda sgrukturna gu.ep npfiinaraenoro device.

Y-, the triad contains block 1--пп ни ни ни ни перед перед перед leading edge of the pulse, block 2 nbmeiicHvm of the trailing edge of the pulse, the first T, second 4 and third 5 elements And, scooping 6, second 7 and third B triggers, element OR 9 , Delay element O, integrator 11, video storage element 12, recorder 13, pontz meter 14 and keys 15, 16, 17, At the inputs of Rlokop 1, 2, selection of the past and edge fronts. Ordinary lines and are the input of the device, and РМХС1ДЫ of blocks 1, 2 correspond to;: TneFiHo through the first 3 Н of the second 4 Л of the tape And are connected to the first inputs of tiepnoro 6 and the second 7 triggers, the outputs of which 11 OR 9, through which the input through terminal 1 111 is connected to the first input.) 12 storage ports, the speech are connected together 10 Delays, the third element And S and Tprrin t ipiirrep 8 - to the second ng. July 12 Storage samples, IMF g Kfvroporo skull potentiometer 14 rnv iK liKi-iiMi 1C to the input of the recorder-h 13, Cl g-h 17) to the installation input of the trckerop 6, 7, 8 and integrator 11. Keys 1b and 16 are connected to the second; m phodlm first 3 and second 4 ele -1OI 1 PP,

Vr; g, m1Y1 tpo works as follows o6-).

llpjif-n taking measurements does not require XTTnt o. to read (and then release) key 1 /. Gt1) sets p (; hsd: 101 src). At the same time, the outputs of 11 emigers 6, 7.8 form a GIT-CHL11 of a logical O, the signal to the pch of the processor 11 is equal to zero, the elec- pi-1,1rki and the signal at its output nonrr pqci (general) fell) I output integra, h 11,.-i lKaiaHHe recorder 13

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Blocks 1 and 2 of the front and back edges of the pulse generate pulse signals with a duration shorter than the minimum possible pulse width of the input signal, when the measured and rising edges of the measured CHI signal arrive at their inputs, respectively.

When the measurement is performed, key 16 is turned on. When the trailing edge of the pulse output signal 1 is received at the output of AND element 4, trigger 7 ri of OR element 9, signal 1 is also generated (key 16 can be opened). Integrator output signal

11 and the sample-storage element 12 begins to increase. After some time (choose large duration of pulses generated by blocks 1, 2) at the output of element 10, a logical signal 1 is generated.

5, when the output from the output unit 2 of the selection of the trailing edge of the pulse of the next logical signal.

Sample-Storage 12 goes into storage (memory) mode, and the value of the signal at its output will be proportional to the period of repetition of the input pulses. By means of a potentiometer 14, such a part of the signal from the input of block 12 is supplied to the input of the recorder 13 so that the data of the recorder corresponds to 100 (100 units on the microammeter scale or the number 100 on the digital indicator).

Using key 17, the device is reset. Then the key 15 is turned on. When the front edge of the pulse of the logical signal arrives from the output of block 1, the outputs of the And 3 element, the trigger b and the OR element 9 also generate the logical 1 signal (the key 15 can be turned off). The output signal of the integrator 11 and the sample-storage element 12 will begin to increase. After some time, at the exit of the delay element 10, a signal of logical 1 is formed. When a pulse 1 is allocated from the output of block 2, the logic 1 is output at the outputs of element 5 and trigger 8, a logical signal 1, sample 12, is generated -,

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The data will go into storage mode, and the value of the signal at its output will be proportional to the duration of the input pulses. In this case, the readings of the recorder 13 will correspond to the percent duty cycle of the pulse signal.

Claims (1)

The claims yctpoftcTBO for measuring the duty cycle of a pulse signal, containing blocks for selecting the leading and trailing edges of the pulse, the inputs of which are combined and serve as the input of the device, a trigger, an integrator and a registrar, characterized in that, in order to increase the accuracy of the measurement, three AND elements are introduced into it , OR element, two triggers, delay element, fetch-storage element, potentiometer and three keys, while the outputs of the blocks of selection of the front and rear GB edges of the pulse s c n 5 respectively, through the first partition that is connected first (Fri AND, the first trigger and the second AND element and the second trigger are connected to the first and second inputs of the OR element, which is connected via the integrator to the first input of the storage-storage element, and through serially connected delay element, third element And and the third trigger - to the second input of the sample-storage element, the output of which is connected through a potentiometer to the input of the recorder, while the installation inputs of the triggers and integrator are connected to one of the contacts in the third key, the second inputs of the first and second elements AND are connected respectively to one of the leads of the first and second keys, and the second outputs of all three keys are combined and connected to a current source, the output of the trailing edge selection unit is connected to the other input of the third element AND.