SU1408001A1 - Device for monitoring weft density of fabric - Google Patents

Description

The third element AND and the sixth element OR, respectively, and the inputs of the sixth element OR are respectively connected with the outputs of the first and second drivers and the fourth element OR, the direct output is the second trigger and the generator output is the reference frequency through the fifth element AND with c:; pressing the input of the third counter, the reset input connected to the output of the third element OR, the second input connected to the output of the second element OR, the outputs

the third element AND and the fourth element OR through the seventh element OR are connected to the reset input of the first trigger and the first input of the eighth element OR, the second input of which is connected to the output of the third driver, the output with the reset inputs of the first and second counters, the second input of the fifth element OR is connected to the output of the sensor of the controlled fabric length, and the output of the fifth element OR is connected to the control input of the counter of the number of weft threads.

one

The invention relates to the textile industry, more specifically to devices for measuring the density of moving tissue by weft.

The purpose of the invention is to increase the accuracy of the control by reducing the influence of - skipping information pulses because of the presence of weft threads on the 1 | 1 measurement process,

I Figure 1 shows the block diagram of the device; Fig. 2 shows the construction of a correction unit of a measurement result in a measurement.

The device contains a sensor for the presence of test leads, which includes a radiation source 1 with a lamp 2 and a condenser 3, a reflector 4, mounted on a shell 5, a radiation receiver consisting of a phototransistor 7 and a lens 8, a measuring results correction unit -9 and a sensor 10 of controlled fabric length.

The output of the phototransistor 7 through the amplifier 11 and the driver 12 is connected by the t input of a block 9 containing triggers 13 and 14, elements and 15–19, elements OR 20–27, a counter 28, drivers 29–32 (the driver 31 is a pulse shaper Reset). The output of the element OR 22 sub-keys to the input of the counter 33 is the number of weft threads.

Block 9 includes counters 34 and 35, Generator 36 reference frequency, counter 37, register 38, and block 39 of the comparison.

The output of the counter 33 is associated with the corresponding -inputs of the memory block 40 With an indication. Shaper output

12 is connected to the C-in trigger. 13, as well as with input elements And 15 and 16. Q-output trigger. 13 is connected to the input of the element AND 16 and to the input of the element AND 17, and the Q-output of the trigger 13 is connected to the input of the element 15, the output of which is connected to one input of the element OR 20, the other input, which is connected to the output of the element 16. And 16 is connected to the C-input of the counter 28. The output of the element OR 20 through the driver 29 is connected to the input of the element OR 22 and through the driver 30 to the input of the element OR 23.

The output of the element OR 22 is connected to the input of the element OR 23, the output of which is connected to the R-input of the counter 34. The output of the shaper 31 of the reset pulse is connected to the inputs of the OR 24 and 25 elements, and the output of the OR 24 element is connected to the input of the OR 26 element, with R- the trigger 14 and the first input of the OR 21 element, the second and third inputs of which are connected to the outputs of the formers 29 and 30, and the output of the OR 21 element is connected to the R-BXO up to the counter 35. The output of the OR element 26 is connected to the R input of the trigger 13 and with the INPUT of the element ШИИ 27, another input of which is connected to the output of the driver 32 and to the C input of the trigger 14, (whose output is connected to the input of the element And 18 and the input of the element And 19.

The output of the generator 36 is connected to the inputs of the elements And 17 and 18, the outputs of which are connected respectively to the 0-inputs of the counter 37 and the counter 34,

moreover, the R input of the counter 37, as well as the R input of the counter 28 are connected to the output of the OR element 27, the outputs of these counters are connected respectively to the parallel inputs and to the C input of the register 38, and the output of the counter 28 is connected to the input of the imager 32.

The outputs of the register 38 are connected to the parallel inputs of the block 39. the comparison, the parallel inputs of which are connected to the outputs of the counter 34, and the output of the block 39 is connected to the input of the element AND 19, and its output is connected to the inputs of the elements OR 22 and 26 and with the C input of the counter 35, the output of which is connected to the input of the element OR 24, the output of the sensor 10 is connected to the input of the memory block 40 with indication and to the input of the element OR 25, the output of which is connected to the input of the counter 33.

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The device works as follows.

When the power is turned on, the S-inputs of the flip-flops 13 and 14 are set to a signal 1, and the block 9 is reset to the initial state by the shaper 31 of a reset pulse. Meanwhile, the triggers 13 and 14 and the counters 28 through 37 are set to the zero state. Generator 36 begins to generate signals with a frequency exceeding the maximum frequency of information signals about the number of threads entering the input of block 9 Simultaneously trigger 13 output Q allows the signal to pass through): through element 15, and output Q prevents the information signal from passing through the element And 16, as well as the passage of signals from the generator 36 through the element And 17. The trigger 14 its output Q prohibits

the passage of signals through the elements 45 And 18 and 19.

The first signal carrying information about the density of the fabric passes through the amplifier 11 and the driver 12 on

the first input of the element 15, from which 50 ° is the average period duration, is found through the element OR 20 to the front of register 38, permanently collectors 29 and 30 of a short pulse on the front and rear edges. From the output of the imaging unit 29, the signal passes through the element OR 22 to the first input of the counter 33 of the number of threads and through the element OR 23 to the R input of the counter 34

. is recited.

With the installation of the trigger 14 in the single state, the process of comparing the frequencies (period) of the current information signals with the average frequency (period) of the preceding information signals begins. Trigger 14 with its output Q allows passage

the duration of the period, dropping it into O.

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35 40

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The signal generated at the falling edge from the imaging unit 30, through the OR element 23, is also fed to the R input of counter 34. Thus, the primary information signal is written to counter 33 and resets to Counter O. The trigger 13 is sent by the falling edge of the first signal on the C input, it is thrown into one state, prohibiting its Q-output from passing information signals through the AND 15 element and allowing the Q-output to pass information signals on the AND 16 element on the OR 2b element and on the C-input of the counter 28 averaging periods, and filling in signals from generator 36 through element 17 to the C input of counter 37 of filling signals. Thus, the trigger 13 synchronizes the beginning of the counting of the filling signals with the beginning of the period of the second input information signal.

On the front and rear frontand of all information signals by the shaper 29 and 30, short signals are formed, passing through the elements OR 22, 23, 21 and discharging counters 34 and 35 into the O through R-inputs. Information about the passage of each signal from the shaper 29 through the element OR 22 is recorded in the counter 33. When the number 28 of the information signals passes through the counter 28 on the falling edge of the last signal at the output of this counter 28

20

a 1 appears, which, by the leading edge, overwrites the information accumulated in counter 37, divided by n, into register 38, and a signal is generated on the former .32, which is reset via element. OR 27, counters 28 and 37 in O. of the same signal, trigger 14 is transferred to 1. I

The averaging cycle is subsequently performed for each of the hell h signals, while the trigger 13 is in a single state. Thus, “nforma

50 ° of the average duration of the period, found in register 38, constantly

. is recited.

With the installation of the trigger 14 in the single state, the process of comparing the frequencies (period) of the current information signals with the average frequency (period) of the preceding information signals begins. Trigger 14 with its output Q allows passage

the value of the value is through element 18 to the C input of the counter 34 of the period. As mentioned above, the counter 34 drops in the formers 29 and 30 along the front and rear edges of each information signal. In the intervals of the dump signal, the information about the number of filling signals that came on it during this time is accumulated on the count.

This information is compared with a register register 38 by comparison unit 39. If during the average period of iodine. expressed by the code of the register 38, the input of the Correction Unit 9 is not abusive: the information signal or the duration of the information signal is higher than the duration of the averaged | transi1od, then at some moment the register codes 38 and the 34 coincide. The output of Comparator 39 appears an artificial signal. This reconstructed signal passes through the elements AND 19 and Shchsch 22 to the input of the counter 33 of the number of units, as well as through the elements OR 22 and 23 to reset the counters 34 to O

The same signal passes through the element OR 26 to the R-input of the trigger 13 prohibiting the process of determining the average frequency of the informational signals on a section of tissue with optical irregularities and through the element OR 27 to the K-5 soda meters 28 and 37, dropping them p O . The signal from the output of the block 39 (cpu) of the input goes to the C input of the thread skipping counter 35. The state of trig- irep 14 and register 38 remains the same

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Thereby, the information recovery process continues either until the next information signal arrives, or until a previously specified number accumulates on counter 35 and a positive signal appears at its output, resetting the entire circuit to its initial state through the element: IPI 24. Counter 35 thread skip It is necessary to ensure that when the fabric disappears, stops, failure of the previous equipment, etc. do not constantly supply false information about the processors to the counter of signals;

After block 9 is reset, with the arrival of information signals on amplifier 11 and driver 12, the device repeats

Sensor 10 is a length meter, which can be used by any known meter with I1 PULSE OUTPUT, after passing each base portion of length 1 of the cloth, it produces a multiplex signal which, having passed through the OR 25 element, rewrites information from the counter 33 into the memory 40 with the indication and the falling edge resets the counter 33 to O. On the display, the measured density of the weft tissue is displayed, equal to the ratio of the number of information and artificial signals that passed to the counter 33 during the transit time ASTK fabric length 1, k 1, the length of this portion.

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Claims (1)

DEVICE FOR CONTROL OF DENSITY OF FABRIC FABRIC DRAWINGS, containing sensors for the presence of weft threads and the length of the fabric being monitored, a unit for correcting measurement results, a counter for the number of weft threads, the bit outputs of which are connected to the corresponding bit inputs of the memory block with an indication that controls the input associated with the sensor output the length of the controlled tissue, characterized in that, in order to increase the accuracy of control by reducing the influence of skipping information pulses on the presence of weft threads on the measurement process, b The measurement result correction block consists of triggers, AND and OR elements, counters, a comparison unit, a register, a reference frequency generator, a reset pulse shaper and shapers, while the installation input of the first trigger is connected to the output of the weft filament sensor, the direct output of the first trigger and the output the sensor for the presence of weft threads through the first element AND are connected to the summing input of the first counter and the first input of the first element OR, the inverse output of the first trigger and the output of the sensor for the presence of weft threads the second AND element is connected to the second input of the first OR element, the output of which, through the first and second formers, respectively, is connected to the first inputs of the second and third OR elements, the second input of the second OR element is connected to the output of the third AND element, and the output is connected to the counter counter input the number of weft threads, and the direct output of the first trigger and the output of the reference frequency generator through the fourth element And are connected to the summing input of the second counter, bitwise (the moves of which are connected to the corresponding the bit inputs of the register, controlling the input connected to the output of the first counter, and the bit outputs - with the corresponding first Bit inputs of the comparison unit, the second bit inputs of which are connected with the corresponding bit outputs of the third counter, and the output - with the first input of the third element And, the second input connected to the direct output of the second trigger, the installation input through the third driver connected with the output of the first counter, and the dump input - with the output of the fourth OR element, while the output of the reset pulse generator is connected with the first inputs of the fourth and fifth OR elements, the second input of the fourth OR element is connected to the output of the fourth counter, the counting and Reset inputs associated with the codes of the third AND element and the sixth OR element, respectively, and the inputs of the sixth OR element are connected the outputs of the first · the second shapers and the fourth element OR, direct output of the second trigger and the output of the reference frequency generator through the fifth element And connected with the summing input of the third account the input, the third input OR connected to the output of the third element, the second input connected to the output of the second OR element, the outputs of the third AND element and the fourth OR element through the seventh OR element are connected to the reset input of the first trigger and the first input of the eighth OR element, the second input of which is connected to the output of the third shaper, the output is with the discharge inputs of the first and second counters, the second input of the fifth OR element is connected to the output of the length sensor of the tissue being monitored, and the output of the fifth OR element is connected to the counter input of the counter of the number of weft threads.