SU1217946A1 - Apparatus for monitoring the surface density of textile materials - Google Patents

Description

The invention relates to the control and measuring technique of textile industry, in particular to devices for controlling the surface density of textile materials.

The purpose of the invention is the expansion of technological capabilities by providing differential control of the surface density of a textile material across its width.

The drawing shows the block diagram of the device.

The source 1 (distributed) radiation is located under the controlled material 2. In the focal plane of the optical system 3, there is a discrete scanistor 4 connected to the source 5 of the bias voltage and to the generator 6 of the sawtooth voltage. The output of scanner 4 via differentiation unit 7 is connected with integrator 8 and counter 9.

The integrator 8 through the discriminator 10 is connected to the corresponding inputs of the registers 11, the number of which is equal to the number of zones of the counter-density of the surface density of the material along its width. Counter 9 and recorders 11 form an information processing unit. Each recorder 11 consists of two logical elements I.12, the first inputs of which are connected to the outputs of the counter 9, and the second inputs - to the outputs of the discriminator 10.

The device works as follows.

The radiation from the distributed radiation source 1 transmitted through the controlled material 2, with the help of the optical system 3, is focused on the light-receiving window of the scanner 4 located in the focal plane of the optical system 3. The bias voltage source 5 and the sawtooth generator 6, allow you to receive at the output of the scanner 4 a signal reflecting the density of the nonwoven material across the width. This signal is converted by means of a differentiation unit 7 into pulses, the amplitude of which is inversely proportional to the surface density in the corresponding zone of the material being monitored. From the output of block 7, pulses are fed to the input of integrator 8, the output of which produces signals proportional to the surface

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density of the monitored material in the relevant zone, as well as on the counter 9, necessary to identify the control zone. From the output of the integrator 8, a signal whose level corresponds to the surface density of the material in the controlled area is fed to the discriminator 10, which has response levels determined by the upper and lower tolerances on the surface density of the material being monitored.

With the appearance of the first pulse at the output of the scanner 4, which corresponds to the monitoring of the surface density of the material in the first zone, a potential signal appears at the first output of the counter 9. With increasing potential at the output of the generator 6, the sawtooth is. voltage up to a certain value, the second zone of the scanner 4 begins to work and a second pulse appears at its output, corresponding to the surface density of the monitored material in the second zone, and at the same time the potential signal is removed from the first output of counter 9, but a potential signal appears on his second exit.

Subsequently, as the next zones of the scanner 4 are put into operation, potential signals appear successively at the outputs of counter 9, and the appearance of a potential signal at the corresponding output of counter 9 corresponds to monitoring the material in a certain zone.

If the number of zones of scanner 4 is equal to the number of control zones and the counter 9 has the number of outputs, also equal to the number of control zones, when the last zone of the scanner 4 is activated, a potential signal appears at the last output of the counter 9. With the appearance of a pulse from Scanner 4, corresponding to the first control zone, reappears a potential signal at the first output of counter 9 and its operation cycle repeats.

If the number of zones of Scanstar 4 is a multiple of the number of times greater than the number of control zones, then the counter 9 must have the number of outputs equal to the number of zones of the Scanstor 4, and depending on how many times the number of

the scanner 4 zones are larger than the number of control zones, the corresponding outputs of counter 9 are combined. For example, there are eighteen control zones, the scanistor has thirty-six zones, counter 9 combines the first and second outputs, the third and fourth outputs, etc.

If it is necessary to control a given number of zones, then the parameters of the optical system 3 are chosen so that the projection of the strip of material being monitored, containing a given number of zones, illuminates an equal (or multiple) number of zones of Scanstar 4, while the counter 9 having the number of outputs equal to the number of zones of scanner 4, the outputs corresponding to the free zones of scanner 4 are not used. For example, optional. You need to control eighteen zones, the scanstor has forty zones, the parameters of the optical system 3 are chosen in such a way that thirty-six zones of the scanstors 4 are lit, while the counter 9 does not use four outputs (for example, the first, second, thirty-ninth and fortieth outputs, the projection of the strip of controlled material is located symmetrically on the light-receiving window of the scanistor 4).

If counter 9 has more

The number of outputs than the number of zones scans2179464

torus 4, then the free outputs of counter 9 are not used.

When finding the surface

with the density of the monitored material within the tolerances, the signals at the output of the discriminator 10 are missing and none of the elements And 12 does not work. If in any zone

10 the surface density of the nonwoven material is above or below the set tolerances, then the corresponding signal of More or

J5 Less, which is fed to the first input of one of the elements And 12. the recorder 11, which controls the surface density of the nonwoven material in the corresponding zone. BUT

20 since, with the inclusion of a certain area of the scantor 4 from the output of the counter 9, potential signals are also supplied to the second inputs of the And 12 elements of the corresponding recorder 11, then a signal appears at the output of the corresponding element And 12, which can be used either to give a light signal of the deviation of the surface density

, Q of the controlled material in the corresponding zone is beyond the tolerance limit, or to record this deviation on the register of the instrument.

Claims (2)

1. DEVICE FOR CONTROL OF THE SURFACE DENSITY OF TEXTILE MATERIALS, containing a radiation source and a scanner with an optical system, mounted on different sides of the plane of movement of the material, a bias voltage source and a sawtooth voltage generator associated with the corresponding inputs of the scanner, the output connected to the input of the differentiation unit, and the unit information processing, characterized in that, in order to expand technological capabilities by providing differential surface control the density of textile material along its width, it is equipped with an integrator and discriminator connected in series, and the information processing unit consists of a counter and recorders, the number of which is equal to the number of zones of control of material density surfaces by its width, while the output of the differentiation unit is connected to the inputs of the integrator and estimator each output of which is connected to the first and second WMOs dami'sootvetstvuyuschego recorder ^1, and the third and fourth inputs of all registers connected to the corresponding outputs diskrimin torus. 2. The device according to π. 1, with the fact that each registrar consists of two logical elements AND, the first inputs of which are the first and second inputs of the registrar, and the second inputs are the third and fourth inputs of the registrar.