CN2118290U - Tester for fine degree of yarn - Google Patents

Abstract

The utility model relates to a device for testing the fineness of yarn and counterparts, which adopts a photoelectric transducer to convert the fineness of the running yarn into electrical signals; after the electrical signals are analyzed and calculated by a microprocessor, the average fineness, the irregularity CV% value, the U%, the number of flaws and the periodical irregular wave length of the yarn to test. The utility model has the advantages of not need of manual sampling, no influence to regular production, fast information feedback, low environmental requirements and stable results, is especially suitable for on-line test, can also record information on a magnetic tape to preserve and can also be used for automatic test through networking.

Description

Tester for fine degree of yarn

The utility model relates to a kind of yarn detection, display device, the device of particularly a kind of online detection yarn and homologue fineness many index.

Fineness of yarn, as special number, irregularity, yarn defect and periodic wave is the important indicator of yarn qualities, the main device that is used at present detecting in this respect has: (1) Zellweger Uster Tester, its function is more complete, but owing to adopt capacitance type sensor, can only be limited under the constant temperature and humidity condition and use, be unsuitable for the production scene in the laboratory.And bulky, involve great expense; (2) Mni-Uster can only record U% value and RC value, and because of adopting capacitance type sensor, also is unsuitable for using in the changeable production scene of humiture; What (3) U.S. Pat 4963-757 proposed does the pick-up unit of the moving yarn characteristic of receiver with light activated element, adopt two groups of photoreceivers, one is used for detecting, one is used for comparison, the weakness of this mode is the installation site difference of the two, is subjected to the degree difference of external interference, and the parameter of the two and the characteristic characteristics that are difficult to agree, thereby influence test result, two cover photoreceivers also make its structure complicated.

The purpose of this utility model is to provide a kind of structure simpler, environmental interference is little, the pick-up unit of online detection fineness of yarn of energy and quick display result, it can record the fineness of yarn information of positive work in-process under the situation that does not influence ordinary production, and in several seconds time, calculate and demonstrate desired fineness index value, and on universal microcomputer, draw irregular audio-visual picture, wave spectrogram provides data transfer means.

The utility model mainly is made up of photo-electric detection head, holding circuit, A/D converter, microprocessor, keyboard, display, machine internal memory, machine data file, machine data file expansion interface, RS232C serial line interface and tapereader interface, power supply.The photo-electric detection head is an assembly, all the other each several parts fit together as main frame, two part cable connection, wherein the photoelectric conversion section of photo-electric detection head only contains single photoreceptor, this photoreceptor and light source lay respectively at two sides of measured object, and use a slit-aperture type limiting element that is intended to improve receiving sensitivity, the microprocessor of main frame adopts the stronger MCS51 series single chip microcomputer of function, and design has and uses in this series in the sheet tape program memory or the selection circuit of the different model chip of strap internal program memory not, and the memory under program in the machine data file expansion interface can reach the 48K byte; The data memory of machine internal memory is the 16K byte, and machine data file expansion interface also can connect the 48K byte to strengthen adaptability; A/D converter, machine internal memory, machine data file expansion interface, keyboard, display, RS232C serial line interface, tapereader interface all directly are connected on the I/O port of microprocessor, fully excavated the interface potentiality of this single chip microcomputer, simplified the structure; Display can be the LED charactron, also can be the LCD liquid crystal display device, and can adopt the common, inexpensive counter as the LCD display part, thereby further reduces cost.

Further specify below in conjunction with accompanying drawing.

Fig. 1 is the utility model functional-block diagram.

Fig. 2 is the cut-open view of the utility model photo-electric detection head photoelectric conversion section.

Fig. 3 is the wiring diagram of the utility model photo-electric detection head optical signal amplification circuit.

Fig. 4 is host circuit figure of the present utility model.

Fig. 5 judges the periodically process flow diagram of program for the utility model.

Fig. 6 is the wiring diagram of LCD liquid crystal display drive circuit of the present utility model.

Among Fig. 1,1 is the photo-electric detection head, and 2 is wave filter; 3 is the holding circuit of A/D converter, and 4 is A/D converter, and 5 is microprocessor; 6 is machine data file expansion interface; 7 is the machine internal memory, and 8 is keyboard, and 9 is display; 10 is indicator; 11 is the RS232C serial line interface, and 12 is tapereader interface, and 13 is power supply.

Its principle of work is as follows: the photoelectric conversion section of photo-electric detection head 1 will be converted to electric signal along self axial fineness and variation through therebetween yarn; this signal is after signal amplifier amplifies; deliver to the wave filter 2 of main frame; the holding circuit 3 of A/D converter; A/D converter 4 becomes digital signal, and this digital signal is transmitted to microprocessor 5.Microprocessor 5 is also with the background noise of time-sharing format when above-mentioned simulating signal input channel has read no yarn.

The digital signal input has two passages, a passage is a keyboard 8, be used for manual input related parameter (detection lug segment length, yarn speed, detection content and mode are arranged, this mode comprises normal test and two kinds of modes of slow test), another passage is a RS232C serial line interface 11, imports the information of other computing machine.

Microprocessor 5 is according to being solidificated in program work in the hardware, whole procedure is write by the MCS51 machine language, total length 4K byte, every index of being calculated, i.e. the yarn wire size number of ordinary meaning, irregularity CV% value and U% value, slubbing, details, cotton knot, the programmed method of the program of reaching is familiar with by this area professional, so repeat no more, 3 points is described below:

1, the relation of photoreceiver output voltage and fineness of yarn

Ui＝Uo（1－di／Do）

Wherein: Ui, Uo be respectively and do not have yarn by the time photoreceiver output voltage values, di, Do are respectively the bar seam width of yarn diameter, slit-aperture type limiting element.

2, yarn defect sensitivity

The sensitivity of the slubbing that is calculated, details, cotton knot is respectively+50% ,-50% ,+200%.

3, the periodic wave wavelength calculates

This program does not adopt the conventional fourier transform that utilizes to ask the method for wave spectrum, but consider the fast characteristic of simple structure of online detection requirements speed, adopted the principle of simulating artificial intelligent distinguishing periodic wave, promptly sue for peace sampled data (1) by desired wavelength grouping; (2) relatively each the group and; (3) periodic wave is differentiated.Regular, then be periodic wave, show corresponding wavelength, irregular, then explanation is not a periodic wave, does not show its wavelength; (4) revise step-length; (5) differentiation of transfiniting, wavelength surpass the maximal value of setting, and then repeat above-mentioned (1)-(4), otherwise finish.

The way of output is totally four kinds of forms, and a kind of form is a display 9, Presentation Function prompting symbol, the current numerical value and the last result of calculation of keyboard input, promptly average special number, irregularity CV% and U% value, slubbing, details, and cotton knot, the wavelength numerical value that the cycle is irregular; A kind of form adopts light emitting diode 10 to make indicator, indication work at present state; A kind of form is a tapereader interface 12, microprocessor 5 is by this interface, data are recorded on the tape, utilize this mode, the user can preserve data, and these data can be taken to the cheap universal microcomputer of APPLell series and do further data processing, and draw out irregular audio-visual picture and wave spectrogram, do not need extra expenses; A kind of form is a RS232C serial line interface 11, can be to APPLell or IBM, and universal microcomputer such as Great Wall series is carried sampled data and information, and draw on above-mentioned microcomputer irregular audio-visual picture and wave spectrogram do not need extra expenses yet.

Consider that from economic point of view alternating current-direct current dual-purpose power supply 13 can utilize the AC power (36 volts) of spun yarn doffer or other single-phase alternating current (220 volts) to power, and also can adopt accumulator and dry cell power supply behind rectifying and voltage-stabilizing.

Among Fig. 2,2-10 is a shell, its top offers a measuring flume 2-4, the bottom inside of shell 2-10 is equipped with a base 2-9, the side of measuring flume 2-4, the end of base 2-9 is equipped with a support 2-7, end at support 2-7 is equipped with an infrarede emitting diode 2-8 along the horizontal axis direction, the other end of support 2-7, between infrarede emitting diode 2-8 and the measuring flume 2-4, be equipped with one and be used to make from the parallel convex lens 2-6 of the light of infrarede emitting diode 2-8.The opposite side of measuring flume 2-4, the other end of base 2-9 is equipped with silicon photocell 2-1 successively, and slit-aperture type limiting element 2-2 prevents that with being used to the bar of slit-aperture type limiting element 2-2 from stitching the glass sheet 2-3 that builds up flyings.

The yarn 2-5 of operation is by measuring flume 2-4 the time, because yarn 2-5 blocks the light of a part from infrarede emitting diode 2-8, the light-receiving area of silicon photocell 2-1 is reduced, and change with the variation of yarn 2-5 fineness, just obtain corresponding electric signal at the output terminal of silicon photocell 2-1.

In Fig. 3, IC12, IC13 is an operational amplifier, operational amplifier IC12, silicon photocell E1(2-1), resistance R 21 and R22 constitute first order signal amplifier, reception is from infrarede emitting diode DO(2-8) light signal, and being converted into corresponding electric signal, the input end of first order signal amplifier is floating ground connection, operational amplifier IC13, resistance R 23, R24 and R25 constitute second level amplifier, adopt negative feedback amplifier circuit, and feedback resistance is R24, R25, wherein R25 is a variable resistor, electric signal after amplifying through two-stage amplifier as gain-adjusted, by the output terminal output of operational amplifier IC13, through cable transmission to main frame.

In Fig. 4, IC1 is an A/D converter, IC2 is an address latch, IC3, IC4 is a data memory, IC5 is a microprocessor, and IC6 is a code translator, IC7, IC8 is an operational amplifier, IC9 is a code translator, IC10, IC11 is respectively the receiver and the driver of RS232C serial line interface, and S1 is the input socket of RS232C serial line interface, and S2 is the accessory power outlet of RS232C serial line interface, S3 is the signal plug of tapereader interface, K1 is a reset key, and K2 is the selector switch of microprocessor IC5, allows to select for use the different model chip with or without the MCS51 series of sheet internal program memory, KB1-KB8 is a keyboard, and D8 is the light emitting diode as indicator.

Be converted to digital signal behind mould/number conversion circuit protection circuit that the simulating signal of input main frame is formed via second order active low-pass filter, diode D1 and the resistance R 1 of operational amplifier IC7 and resistance R 3 and R4, capacitor C 4 and C5 composition, the A/D converter IC1; deliver to microprocessor IC5 through data bus, this signal include yarn when the detection head measuring flume corresponding to the electric signal of correspondence during no yarn in the electric signal of thickness of yarn and the measuring flume.In whole sampling process, microprocessor IC5 before reading next sampled value Xk+1, utilizes its interval time after reading sampled value Xk, in the memory unit with the sampled value Xk input current data pointer appointment that just read, calculate then add up and $\underset{i=1}{\overset{K}{\mathrm{\&Sigma;}}}\mathrm{Xi},\underset{i=1}{\overset{K}{\mathrm{\&Sigma;}}}{X}_i^2,$ After whole sampling processes finish, microprocessor IC5 by add up and $\underset{i=1}{\overset{N}{\mathrm{\&Sigma;}}}\mathrm{Xi},\underset{i=1}{\overset{\mathrm{<figure-callout\; id="2"\; label="N\; X\; i"\; filenames="922023018\_DRIMG1.png"\; state="\{\{state\}\}">N</figure-callout>}}{\mathrm{\&Sigma;}}}{X}_i^{}{}_2^{}$ Calculate the average special number (Tex) of sample, irregularity CV% value and U% value are compared by the sampled data in mean diameter and the data memory again, can count out the slubbing of tested sample, the number of details and cotton knot is shown The above results at last successively by display.

When customer requirements detects the periodic wave of yarn, microprocessor IC5 at first reads in step-length 2N(N 〉=1 that the user sets from keyboard KB1-KB8), automatically detect the actual effectively size of memory space of this device again, determine corresponding periodic wave maximum wavelength thus and go into max, then survey sampling, after the sampling, going into min(from minimum wavelength, to go into min corresponding with 2N) beginning is the periodicity under each wavelength of step-length sequential analysis with 2N.To each wavelength, calculate earlier the sampled value sum of 10 half-wavelengths successively, carry out periodicity thus and differentiate.Fig. 5 provides and differentiates the periodically process flow diagram of program.When thickness of yarn is periodically, the difference of adjacent two half-wave sampled value sums will replace change sign, display will show corresponding wavelength numerical value this moment, if do not meet above-mentioned rule, then be randomness, display does not show its wavelength numerical value, revise current wavelength, repeat said process, till wavelength numerical value is gone into max greater than maximum wavelength, all periodic wave check and analysis process finishes, the retrieval system original state.

The instruction of keying in according to keyboard KB1-KB8 or by higher level's microcomputer instruction of the input socket S1 input of RS232C serial line interface also can be with sampled data by the accessory power outlet S2 of RS232C serial line interface or the signal plug S3 output of tapereader interface.The situation that the input socket S1 of RS232C serial line interface detects when being used for computer network or being equipped with the universal microcomputer of RS232C serial line interface to use in conjunction with APPLEII, IBM or Great Wall series etc. is automatically inquired about before sampling and after the sampling by microprocessor IC5 and to be realized.

In the present embodiment, 2-8 is the infrarede emitting diode of φ 5, and 2-1 is area of section 5 * 5mm ²Silicon photocell, the bar of slit-aperture type limiting element 2-2 seam width is 1.5mm, display is six seven segment digital tubes.

In Fig. 6, display is made up of counter and transistor driver circuit that the common liquid crystals as the LCD liquid crystal display device shows.Original circuit of counter, function and operation all do not change, and two terminals that only collector and emitter of transistor BD1-BD13 need be inserted keys of computer KC1-KC13 respectively get final product.Be 8 the I/O ports of PI mouth that utilize microprocessor IC5, three ports of P1.0-P1.2 expanded to 8 tunnel outputs, form 13 tunnel outputs altogether together with P1.3-P1.7 with a code translator.Principle of work is as follows: transistor is operated on off state, under microprocessor IC5 control, driver output end is output logic level " 1 " and " 0 " respectively, when this level is " 0 ", transistor ends, and its collector emitter is high-impedance state, is equivalent to open circuit, do not have this moment and show that promptly switch disconnects; When this logic level was " 1 ", transistor was saturated, and its collector one emitter is low resistance state, is equivalent to short circuit, this moment switch closure, thereby make liquid crystal display show respective digital or cls curtain or connect the corresponding function key.

In the present embodiment, the code translator model is 74LS138, drive model is 7407, the transistor model is 3DG6, the R26-R38 resistance is 100K, and the counter model is sharpEL-506H, and KC1-KC11 is respectively the value key 0-9 and the decimal key of this counter, KC12 is the CE key, and KC13 is the ON key.

Because the utility model adopts the photo-electric change-over circuit of single photoreceptor, fundamentally overcome when adopting two cover photoreceivers, the two performance parameters is difficult on all four disadvantage, reduced the detection error, and this photoreceptor and light source all selection work at the element of infrared range of spectrum, make extraneous available light under the situation of direct irradiation not, negligible degree is reduced in the interference that detects, be the limiting element of 0.3-5mm owing to having adopted a seam width again, detection sensitivity is improved greatly, microcomputer and interfacing thereof have been adopted in addition, make the utility model designs simplification, function is strong, the precision height, stable performance, be specially adapted under breaks in production situation not, detect the many index of the fineness of yarn that each spindle processing, especially it has the function of interval between diagnosis ripple, according to the periodic wave wavelength data that it provided, can find out the mechanical fault position fast, yarn qualities is guaranteed reliably, and with low cost.

Claims (5)

1, a kind of fineness of yarn pick-up unit, it is made up of photo-electric detection head 1, wave filter 2, holding circuit 3, A/D converter 4, microprocessor 5, machine data file expansion interface 6, machine internal memory 7, keyboard 8, display 9, indicator 10, serial line interface 11, tapereader interface 12 and power supply 13.The photoelectric conversion section that it is characterized in that photo-electric detection head 1 only contains a photoreceptor, and this receiving device and light source lay respectively at the both sides of measured object; A slit-aperture type limiting element 2-2 who is used to improve receiving sensitivity also is housed between photoreceptor and measured object; the photoreceptor of photo-electric detection head will pass the light signal that the measured position can reflect that measured object changes along self axis direction fineness; change corresponding electric signal into; after amplifying, deliver to the wave filter 2 of main frame; become digital signal through holding circuit 3, A/D converter 4, send into microprocessor 5 at last and handle by giving the program of putting.

2, pick-up unit according to claim 1, it is characterized in that photo-electric detection head 1 is by light source 2-8, lens 2-6, slit-aperture type limiting element 2-2, photoreceptor 2-1 and signal amplification circuit are formed, its shell 2-10 top offers a measuring flume 2-4, shell 2-10 bottom inside is equipped with a base 2-9, this base 2-9 one end is equipped with a support 2-7, two ends of support 2-7 are equipped with a light emitting diode 2-8 respectively along the horizontal axis direction and make from the parallel lens 2-6 of the light of light emitting diode 2-8 with one, the other end of base 2-9, a silicon photocell 2-1 is housed successively, slit-aperture type limiting element 2-2 and the glass sheet 2-3 that prevents to build up in the bar seam flyings.

3, pick-up unit according to claim 1 is characterized in that microprocessor 5 is MCS51 series single chip microcomputer, and the each several part interface circuit directly is coupled on the I/O port of microprocessor.

4, pick-up unit according to claim 2 is characterized in that the bar seam width of slit-aperture type limiting element is 0.3-5mm.

5, pick-up unit according to claim 2 is characterized in that the light source of detection head and photoreceiver form by the device that is operated in the infrared range of spectrum.

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