JP2004316065A - Method and device for controlling weft inserting of jet loom - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for automatically controlling weft inserting of a jet loom on the basis of plural kinds of information without depending upon the perceptions and experiences of a worker. <P>SOLUTION: The control conditions of an actuator of the jet loom are determined by plural control rules based on a control algorithm, by using plural data tables based on the control algorithm or by their approximate expressions, and the actuator is controlled on the basis of the determined conditions. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a method and a device for controlling weft insertion in an air jet loom, a water jet loom, and the like, and more particularly, to a weft insertion control method and device in a jet loom provided with an actuator for weft insertion.

  In the jet loom, flight information such as the rotation angle (attainment angle) of the main shaft when the weft inserted into the warp shed reaches a predetermined position, stop information such as the cause of the loom stop and the number of times. Or the pressure of the fluid ejected from the main nozzle (referred to as "main pressure" in the present invention) and the sub-nozzle based on any one of the quality information such as the weft looseness of the woven fabric and the number of times. The control condition, that is, the control parameter such as the pressure of the fluid to be jetted (referred to as "sub-pressure" in the present invention) is corrected, the actuator is controlled, and the weft insertion is controlled so that the fabric has a predetermined quality. The technology is proposed in the following Patent Documents 1 and 2.

JP-A-56-107046 JP-A-63-75149

  By the way, the correction of the control condition caused by the flight information is executed in a short cycle (minimum one cycle) during the operation of the loom. On the other hand, the modification of the control condition caused by the stoppage information or the quality information can be executed only when the loom stops or the quality of the loom deteriorates, and therefore is executed in a long cycle. Further, the direction of correction may be different between the flight information and the stop information or quality information.

  Therefore, even if the control conditions based on a plurality of types of information are simply used together, the corrections based on these pieces of information are offset each other, and the corrections based on these pieces of information cannot be used together. That is, for example, even if the control condition is corrected based on the stoppage information after the loom is stopped, the control condition is changed to the control condition before the stoppage by subsequently correcting the control condition based on the flight information during the operation of the loom. I will be returned.

  In the techniques described in Patent Documents 1 and 2, the control condition is simply corrected using a single piece of information selected from flight information, stop information, and quality information. Therefore, the control condition cannot be corrected due to a plurality of pieces of information, and for this correction, it is necessary to rely not on the automatic correction but on the manual correction based on the intuition and experience of the operator. .

  An object of the present invention is to make it possible to automatically control weft insertion based on a plurality of pieces of information without depending on the intuition and experience of an operator.

  The weft insertion control method of the present invention combines flight information indicating the state of flight of the weft, stop information indicating the state of stopping the loom, and / or quality information indicating the state of the quality of the woven fabric. And determining the control condition of the actuator for weft insertion based on the control algorithm for weft insertion created as described above, and controlling the actuator based on the obtained control condition.

  The weft insertion control device of the present invention generates flight information indicating the state of flight of the weft, stop information indicating the stop state of the loom, and / or quality information indicating the state of the quality of the woven fabric. Means for generating information, means for determining a control condition of an actuator for weft insertion based on a control algorithm for weft insertion created by combining the information, and controlling the actuator based on the obtained control condition. Means.

  The control condition can be obtained by an expert system configured according to the control algorithm, and the information generating unit includes a data table having data for weft insertion configured according to the control algorithm. It can also be determined based on the information generated and the data.

The control algorithm is, for example, when the control target is the main pressure,
"If there is a lot of looseness, raise the main pressure regardless of the tip trouble, tip blow-through, body fallout, the average value and variation of the final release timing, and the average value and variation of the arrival timing."
"There is no looseness, but if there are many troubles at the tip, blow-through at the tip, and body slippage, do not change the main pressure if there was looseness before."
"If there is no looseness, but there are many troubles at the tip, blow-through at the tip and body fallout, if there was no looseness before, regardless of the average value and variation of the final release timing, the average value and variation of the arrival timing, etc. Reduce pressure "
And so on, it is composed of a combination of the flight information and the stop information or the quality information.

The expert system, based on the above control algorithms, for example,
"If the current number of loosening is large, increase the main pressure by p"
"No looseness, but there are many troubles at the tip, blowout at the tip and body fallout. If there was a looseness before, the main pressure will not change."
"There is no looseness, but there are many troubles at the tip, blow-through at the tip, and body fallout. If there was no looseness before, lower the main pressure by p."
For example, control conditions are obtained based on a plurality of control rules using a combination of the flight information, the stop information, and / or the quality information. In this case, p may be a value that actually changes the pressure, may be a value that changes the target value of the pressure, may be a value common to the control rules, The value may be different for each rule.

  The calculating means stores, for example, data such as the correction amount of the control target such as the main pressure in a data table for each combination of the flight information and the stop information or the quality information. Data at an address corresponding to the combination with the platform information or the quality information is read from the data table, and a control condition is obtained based on the read data.

  The obtained control conditions are supplied from appropriate means such as an expert system or arithmetic means to a control means such as a pressure controller, and the control means controls an actuator such as a pressure regulator based on the supplied control conditions.

  According to another weft insertion control method of the present invention, flight information indicating a flight state of a weft, stop information indicating a stop state of a loom and / or quality information indicating a quality state of a woven fabric are provided. And determining an actuator control condition for weft insertion using an approximate expression that is used in combination with the control, and controlling the actuator based on the determined control condition.

  Another weft insertion control device of the present invention includes: flight information indicating a state of flight of a weft; stop information indicating a stop state of a loom; and / or quality information indicating a state of quality of a woven fabric. An information generating means for generating a plurality of approximation formulas for calculating a control condition of an actuator for weft insertion using the information generated from the information generating means; and the information and the approximation. The control means includes a calculating means for calculating the control condition using an equation, and a control means for controlling the actuator based on the calculated control condition.

  The approximate expression is, for example, to actually operate a loom by a veteran operation, obtain data on flight information, stop information or quality information, control conditions of an actuator, and the like at that time, and for example, use multiple regression from the data. It can be determined by analysis. The approximation formula obtained in this way approximates the control algorithm considered by veterans.

  According to the above-described control method and apparatus, the weft insertion can be controlled using not only the running information during operation but also the stoppage information or the quality information, and the weft insertion can be performed in a state where the information is satisfied. can do.

  According to the control method and the apparatus using the approximate expression, the weft insertion can be controlled using not only the running information during operation but also the stoppage information or the quality information, and the weft insertion can be performed in a state where the information is satisfied. Can be.

  Referring to FIG. 1, the loom 10 is a pneumatic or water jet loom, and includes a drum-type length measuring and storing device 14 for the weft 12. The weft yarn 12 is wound around a yarn feeder 16, and is supplied from the yarn feeder 16 to a known weft insertion device 18 via a length measuring and storing device 14, and the weft insertion device inserts the weft into the opening 22 of the warp 20. Put in.

  At the time of length measurement, the leading end of the weft 12 is prevented from being unwound from the length measurement and storage drum 28 by a locking pin 26 operated by an electromagnetic solenoid 24, and the outer periphery of the drum 28 is rotated by rotation of the yarn guide 30. It is wound around the surface for a predetermined length and stored.

  On the other hand, at the time of weft insertion, the weft 12 is unwound from the drum 28 by the release of the pin 26, and is injected together with the fluid from the main nozzle 32 of the weft insertion device 18 and is inserted into the opening 22 of the warp 20. , Be cut off. The weft insertion device 18 includes a plurality of sub-nozzles 34 for ejecting a fluid that advances the weft yarn 12 in a predetermined direction during weft insertion.

  The working fluid of a pressure source 36 is supplied to the main nozzle 32 via a pressure regulator 38 and an on-off valve 40. On the other hand, the working fluid of the pressure source 36 is supplied to each sub-nozzle 34 via the pressure regulator 42 and the corresponding on-off valve 44.

  The loom 10 also includes a motor 48 for the main shaft 46 that drives the reed. The rotation of the motor 48 is transmitted to the main shaft 46 by the coupling mechanism 50. An encoder 52 that generates a rotation angle signal corresponding to the rotation angle of the main shaft and an electromagnetic brake 54 for the main shaft 46 are connected to the main shaft 46. The length measuring and storing device 14 and the weft inserting device 18 are driven in synchronization with the rotation of the main shaft 46 together with a heald, a reed and the like.

  The weft insertion control device for the loom 10 sets a detection circuit 60 for detecting operation information relating to weft insertion of the loom, a storage circuit 62 storing various information, data, and the like, and manually sets various information. A setting circuit 64; an arithmetic circuit 66 for obtaining control conditions based on information and data from the circuits 60 to 64; and a pressure for controlling the pressure regulators 38 and 42 based on signals supplied from the arithmetic circuit 66. A controller 68, a timing controller 70 for operating the open / close valves 40 and 44 and the electromagnetic solenoid 24 based on a signal supplied from the arithmetic circuit 66, and a warp tension mechanism (not shown) based on a signal supplied from the arithmetic circuit 66 ) Is controlled.

  The operation information includes flight information, stop information, quality information, and the number of picks. Therefore, the detection circuit 60 includes a first detector 74 for detecting that the weft 12 has been inserted to the final position, and a second detector for detecting that the weft 12 has been inserted at or above the allowable position. 76, an unwinding sensor 78 for detecting that the weft yarn 12 has been unwound from the length measuring and storing device 14, and output signals 74a, 76a, 78a, 52a of the encoder 52 are supplied. The output signal 78 a of the unwinding sensor 78 is also supplied to the timing controller 70.

  The detection circuit 60 includes a circuit 60a for detecting a flying state of the weft, a circuit 60b for detecting the cause of the stop of the loom, a circuit 60c for detecting the quality of the fabric, a circuit 60d for detecting the pick, and the like.

  As the flight information, for example, a so-called unwinding timing such as a rotation angle (unwinding angle) of a main shaft when a weft of a predetermined winding is unwound from the length measuring and storing device, and a leading end of the weft is moved to a predetermined position. The average value, variation, and the like of these weft flight timings, such as the so-called arrival timing such as the rotation angle of the main shaft (arrival angle) at the time of arrival, can be used.

As for the flight timing,
* A so-called final unwinding timing such as the rotation angle of the main shaft when the last winding of the weft is unwound from the length measuring and storing device. Final arrival timing * At least one selected from so-called intermediate arrival timings such as the rotation angle of the main shaft when the weft reaches a predetermined position between the length measuring and storing device and the final position can be used.

As a specific value of the average value of the flight timing, for example,
* Average value of flight timing itself * Difference between average value of flight timing and its target value, that is, average value error * Average value of maximum or minimum value of flight timing itself * Maximum or minimum value of flight timing At least one selected from the difference between the average value of the target and its target value can be used.

As a specific value of the variation of the flight timing, for example,
* Variation of flight timing itself * Difference between flight timing variation and its target value, ie, variation error * Variation of maximum or minimum flight timing itself * Variation of maximum or minimum flight timing and its variation At least one selected from a difference from a target value or the like can be used.

  The stop information is the number of stops for each stop cause. The causes of the stop include a so-called H1 stop caused by the fact that the weft 12 is not detected by the first detector 74 and a so-called H2 stop caused by the fact that the weft 12 is detected by the second detector 76.

  Causes of the H1 stop and the H2 stop include, for example, the following.

H1 stop * Tip trouble * Ven Topic * Warp hook * Mistake in length measurement * Tip blow-through * Cutting mistake * Dead stop

H2 stop * Out of body * Out of restraint

  The following can be given as the quality information.

* Loose * Bili * Fuzz

  The stoppage information and the quality information can be obtained by inputting their signals if there are sensors that can automatically detect individual phenomena. It is obtained by manual input based on the judgment of the member. In addition, the quality information is input during operation of the loom or after the stand is stopped by a sensor or a worker's judgment.

As control conditions, that is, control parameters, for example,
* Main pressure * Sub-pressure * Timing of starting fluid ejection from main nozzle * Timing of ending fluid ejection from main nozzle * Timing of starting fluid ejection from sub-nozzle * Timing of ending fluid ejection from sub-nozzle * By measuring and storage device Timing of starting the unwinding of the weft * Timing of ending the unwinding of the weft by the length measuring and storing device * At least one selected from the start of the weft insertion, that is, the start of the launch of the weft can be used. Here, the start of weft insertion means that the timing is controlled by both the timing of the ejection of the fluid from the main nozzle and the timing of the start of unwinding of the weft by the length measuring / storing device. This is the parameter for the case.

  The setter 64 includes a thread type, a representative value (average value, median value, mode value, fastest value, slowest value, etc.) of the target value of the control parameter, and a variation (standard deviation, range, etc.) of the target value of the control parameter. ), The number of samples (number of picks, weaving length, time), upper and lower limits of the operation amount, and the like.

  The storage circuit 62 stores a plurality of control rules, a modified value of the control condition, and an approximate expression depending on whether the control condition is determined by an expert system, a data table, or an approximate expression. The modified values of the control rules and control conditions are created according to a predetermined control algorithm. On the other hand, the approximate expression is, for example, actually operating a loom by a veteran operation, and obtaining data such as flight information, stop information or quality information, control conditions of an actuator, and the like from the data at that time. , For example, by multiple regression analysis.

  As described in the related art, a loom generally includes various automatic control systems based on flight information as control during operation of the loom. For example, there is an automatic control system that automatically changes the pressure and / or the injection timing so that the angle at which the weft reaches a weft sensor provided at a predetermined position in the weft insertion path is constant. . By simply adding an automatic control system based on stop information or quality information performed after the loom is stopped to the automatic control system, the two interfere with each other, and their functions cannot be utilized together.

  Therefore, in the present invention, this problem is solved by the following two methods.

    (1) An automatic control system based on flight information and an automatic control system based on stop information are combined to create a control algorithm that combines flight information, stop information, and quality information. And control conditions such as timing.

    (2) The automatic control system based on flight information is operated as it is, and the control algorithm based on stop information and quality information does not change control conditions such as pressure itself. The target value used shall be modified.

  According to the above (1), the control conditions are corrected based on the control algorithm combining the flight information, the stop information, and the quality information, so that the control is executed in a state where each information is satisfied.

  According to (2) above, while using the existing automatic control system based on the flight information as it is, the target value used for this automatic control system is corrected by the automatic control system based on the stop information and quality information. Therefore, the control is executed in a state where each information is satisfied without mutual interference between the automatic control systems.

  An example of the control algorithm based on the above (1) is shown below. Although the following control algorithm is based on the case where the control condition is the main pressure, the control condition may be another control condition described above or a combination thereof.

A1: When there is looseness,
The main pressure is increased irrespective of the average value and the variation of the tip trouble, the tip blow-through, the body missing, the final unwinding timing, and the average value and the variation of the arrival timing.
A2: There is no looseness,
There are many troubles at the tip, blow-through at the tip, and
Had a slack before,
Sometimes, do not change the main pressure.
A3: There is no looseness,
There are many troubles at the tip, blow-through at the tip, and
There was no looseness before,
At this time, the main pressure is reduced regardless of the average value and variation of the final unwinding timing and the average value and variation of the arrival timing.
A4: There is no looseness,
There are few troubles at the tip,
When there was a slack before,
Or there was no tip trouble, tip blow-through and body fallout before,
Sometimes, do not change the main pressure.
A5: There is no looseness,
There are few troubles at the tip,
There was no looseness before,
As before, there were few tip troubles,
The average value of the final unwinding timing is slow or its variation is large,
When, increase the main pressure.
A6: There is no looseness,
There are few troubles at the tip,
There was no looseness before,
As before, there were few tip troubles,
The average value of the final unwinding timing is early,
The dispersion of the final unwinding timing is small,
The average value of arrival timing is late,
Large variation in arrival timing,
When, increase the main pressure.
A7: There is no looseness,
There are few troubles at the tip,
There was no looseness before,
As before, there were few tip troubles,
The average value of the final unwinding timing is early,
The dispersion of the final unwinding timing is small,
The average value of arrival timing is slow, the variation of arrival timing is small,
When, increase the main pressure.
A8: There is no looseness,
There are few troubles at the tip,
There was no looseness before,
As before, there were few tip troubles,
The average value of the final unwinding timing is early,
The dispersion of the final unwinding timing is small,
The average value of the arrival timing is early,
Large variation in arrival timing,
Sometimes, do not change the main pressure.
A9: There is no looseness,
Less tip trouble, tip blow-through,
As before, there is no loosening.
The average value of the final unwinding timing is early,
The dispersion of the final unwinding timing is small,
The average value of the arrival timing is early,
When the variation in the arrival timing is small, the main pressure is reduced.

  In the above control algorithm, since the loosening is a problem in the quality of the fabric, if the loosening occurs even once, the control condition is corrected. On the other hand, the control condition is corrected according to the frequency of occurrence of the tip trouble, the tip blow-through, and the body drop. "High" and "low" are the number of occurrences during a certain period (time, number of picks, weaving length), the ratio of occurrence of each stop cause to the total number of stops during a certain period, and their limit values Can be determined by comparing In addition, “before” can be any time in the past, and for example, can be set based on the time when one yarn feeder is consumed. Further, “small”, “large”, “early”, and “late” can be based on a corresponding target value or limit value.

  Next, an example of a control algorithm for correcting the actual control information by correcting the target value of the control condition based on the above (2) will be described below. This is an example in which the automatic control system based on the flight information controls the main pressure so that the flight timing of the weft falls within the target value. The parentheses indicate the resulting correction of the main pressure.

A10: When there is looseness: The target value of the average value of the arrival timing is made earlier (the main pressure is increased).
A11: When there are many troubles at the end: The target value of the average value of the final unwinding timing and the arrival timing is delayed, and the target value of the variation between them is increased (the main pressure is reduced).
A12: When there are many tip blow-throughs: The target value of the average value of the final unwinding timing and the arrival timing is delayed, and the target value of the variation between the two is increased (main pressure is reduced).
A13: When there is a lot of body skipping: The target value of the average value of the final unwinding timing and the arrival timing is delayed, and the target value of the variation between them is increased (the main pressure is reduced).

  The control algorithm as described above can be created for the other control conditions described above, and can be created using other information.

  When the weft insertion control device uses the expert system, the storage circuit 62 stores a plurality of control rules created according to the above control algorithm. On the other hand, when the weft insertion control device uses a data table, the storage circuit stores a plurality of data for weft insertion created according to the above control algorithm. Further, when the weft insertion control device uses an approximate expression, the storage circuit 62 stores the approximate expression.

  Next, a specific weft insertion control method will be described. The following description is for the case where the main pressure is controlled. However, the same control can be performed for other control conditions such as the sub pressure and the operation timing of the locking pin. Further, other information may be used.

  First, a method of controlling the main pressure using an approximate expression will be described with reference to FIG. The storage circuit 62 stores the following approximation formula for obtaining the correction amount of the main pressure.

    ΔM = f (μk-μk0, σk-σk0, μt-μt0, σt-σt0, y, s)

here,
μk: average value of final unwinding timing σk: variation of final unwinding timing μt: average value of arrival timing σt: variation of arrival timing μk0: target value of average value of final unwinding timing σk0: variation of final unwinding timing Μt0: Target value of average value of arrival timing σt0: Target value of variation of arrival timing y: Current number of loosening ΔM: Corrected value of main pressure s: Tip trouble, tip blow-through and body for all stop times This is the ratio of the total number of stops caused by the dropout.

  The above approximate expression can be obtained by actually operating the loom, recording the values of each input variable at that time, and the adjustment amount by a skilled person experimentally, and performing a multiple regression analysis from these values. .

  The target value μk0 of the average value of the final unwinding timing, the target value σk0 of the variation of the final unwinding timing, the target value μt0 of the average value of the arrival timing, and the target value σt0 of the variation of the arrival timing are respectively stored in the setting circuit 64. It is set in advance.

The arithmetic circuit 66 is based on the final unwind timing and the arrival timing output from the flying state detection circuit 60a.
The average value μk and the variation σk of the final unwinding timing,
Mean value μt and variation of arrival timing and σt
Is calculated, and based on the stop signal for each cause output from the stop cause detection circuit 60b,
Total value due to tip trouble, tip blow-through and body fallout, that is, the total number of stops,
Sum of all the stops per cause, i.e. all stops,
Ratio of the total number of stops to all stops s
, And based on the loose signal output from the fabric quality detection circuit 60c,
Number of loosening y
, And based on the detection signal output from the pick detection circuit 60d,
Number of picks (number of weft insertions)
Is calculated.

  The arithmetic circuit 66 substitutes μk, μk0, σk, σk0, μt, μt0, σt, σt0, t and s into the above approximate expression every time the number of picks reaches the value set in the setting circuit 64. , The correction amount ΔM of the main pressure is obtained, and the obtained correction amount is added to the current main pressure to obtain a new main pressure.

  If the new main pressure is within the upper and lower limit values set in the setting circuit 64, the arithmetic circuit 66 sets the obtained main pressure as a new main pressure as it is, and sets the obtained main pressure outside the upper and lower limit values. If so, the limited value is supplied to the pressure controller 68 as a new main pressure.

  Accordingly, the pressure controller 68 adjusts the main pressure to a new value. As a result, the weft is inserted so as to satisfy any of the running state, the stationary state of the loom, and the quality of the fabric. The above process is performed every predetermined number of picks (or every certain time).

The above approximate expression may be obtained for each yarn type, and a coefficient for each yarn type may be, for example,
Filament yarn: 1
Acetate thread: 2
Processing thread: 3
Glass thread: 4
Spun yarn: 5
And this coefficient may be incorporated in the approximate expression.

  According to the control method using the above approximate expression, the storage capacity of the storage circuit is significantly reduced.

  Next, a weft insertion control method by the expert system will be described with reference to FIG.

  The arithmetic circuit 66 sets the output signal of the flying state detection circuit 60a, the stoppage cause detection circuit 60b, the output signal of the textile quality detection circuit 60c statistically, and the output signal of the pick detection circuit 60d in the setting circuit 64. A counter 82 for counting until the value reaches a value, an inference engine 84 for inferring a modified value of the control condition based on a plurality of control rules stored in the storage circuit 62, and an input signal from each of the circuits 64, 80, 82, 84. And a controller 86 for calculating new control conditions based on the

  An example of the control rules R1 to R9 when the control condition is the main pressure is shown below. The control rules R1 to R9 correspond to the control algorithms A1 to A9, respectively.

Control Rule R ': If there are few troubles at the front end, blow-through at the front end, and body fallout, s = 0, otherwise s = 1.
R ″: s ′ = 0 when the previous troubles at the front end, the blow-through at the front end, and the body dropout are both small, and s ′ = 1 at other times.
R1: If y> 0, ΔM = + p.
R2: If y = 0, s = 1, y ′> 0, ΔM = 0.
R3: If y = 0, s = 1, y ′ = 0, ΔM = −p.
R4: If y = 0, s = 0, and
If y ′> 0 or s ′ = 1, ΔM = 0.
R5: If y = 0, s = 0, y ′ = 0, s ′ = 0, and
If μk> μk0 or σk> σk0, ΔM = + p.
R6: If y = 0, s = 0, y ′ = 0, s ′ = 0, and
μk <μk0, σk <σk0, and
If μt> μt0 and σt> σt0, then ΔM = + p.
R7: If y = 0, s = 0, y ′ = 0, s ′ = 0, and
μk <μk0, σk <σk0, and
If μt> μt0 and σt <σt0, ΔM = + p.
R8: If y = 0, s = 0, y ′ = 0, s ′ = 0, and
μk <μk0, σk <σk0, and
If μt <μt0, σt> σt0, ΔM = 0.
R9: If y = 0, s = 0, y ′ = 0, s ′ = 0, and
μk <μk0, σk <σk0, and
If μt <μt0 and σt <σt0, ΔM = −p.

  The symbols in the above control rules R1 to R9 are as follows.

μk = average value of final unwinding timing σk = variation of final unwinding timing μt = average value of arrival timing σt = variation of arrival timing μk0 = threshold of average value of final unwinding timing σk0 = threshold of final unwinding timing Variation threshold μt0 = threshold value of average value of arrival timing σt0 = threshold value of variation of arrival timing y = current number of loosening y '= number of previous loosening ΔM = corrected value of main pressure p = given in advance Increase / decrease of the main pressure applied s = Percentage of the total number of stops caused by tip trouble, tip blow-through, and body drop-off to the current total number of stops s' = Tip trouble, tip blow-through with respect to all previous stops And the percentage of the total number of stops caused by the body drop

  In the control rules R1 to R9, the average value μk and the variation σk of the final unwinding timing and the average value μt and the variation σt of the arrival timing are output from the flying state detection circuit 60a in the statistical processing circuit 80. It is calculated on the basis of the final unwinding timing and the arrival timing. In addition, the total number of stops caused by the tip trouble, tip blow-through, and body slippage, the total number of stops, the ratio s of the total number of stops to the current total number of stops, s, and the total number of stops to the total number of still stops Is calculated in the statistical processing circuit 80 based on the stop signal for each cause output from the stop cause detection circuit 60b. Further, the current number of times of loosening y and the number of previous times of loosening y 'are calculated in the statistical processing circuit 80 based on the loosening signal output from the fabric quality detecting circuit 60c.

  The threshold value μk0 of the average value of the final unwinding timing, the threshold value σk0 of the variation of the final unwinding timing, the threshold value μt0 of the average value of the arrival timing, the threshold value σt0 of the variation of the arrival timing, and the main pressure. The increase / decrease amount p is set in the setting circuit 64 in advance. Note that these various threshold values can be the same as the various target values used in the embodiment based on the above approximate expression.

  Each time the value of the counter 82 reaches the value set in the setting circuit 64, the controller 86 fetches the data of the statistical processing circuit 80, and passes the fetched data and the execution right to the inference engine 84. Thereby, the inference engine 84 infers the correction value ΔM of the main pressure based on the supplied data and the control rules R ′, R ″, R1 to R9, and supplies it to the controller 86.

  The controller 86 obtains a new main pressure by adding the inferred correction value ΔM to the current main pressure value, and if the obtained main pressure is within the upper and lower limit values, the obtained main pressure is used as a new main pressure. If the obtained main pressure is outside the upper and lower limits, the limited value is supplied as a new main pressure to the pressure controller 68 of FIG.

  Accordingly, the pressure controller 68 adjusts the main pressure to a new value. As a result, the weft is inserted so as to satisfy any of the running state, the stationary state of the loom, and the quality of the fabric. In this case, the above-described process is performed every predetermined number of picks (or every predetermined time).

  In this embodiment, the main pressure itself to be changed is determined based on the control algorithms A1 to A9 in which the flight information, the stop information, and the quality information are combined. Control algorithms A10 to A13 for correcting the target value used in the automatic control system based on the information may be used.

  Next, a weft insertion control method using a data table will be described with reference to FIGS. This embodiment is based on the control algorithms A10 to A13 described above, and employs an automatic control system based on the flight information that corrects the main pressure so that various flight timings fall within a target value. The target value used in the automatic control system is corrected based on the platform information and the quality information.

  Output signals of the stoppage cause detection circuit 60b and the textile quality detection circuit 60c are supplied to data conversion units 90 and 92 in the arithmetic circuit 66. The data conversion unit 90 calculates the total number of stops due to the tip trouble, the blow-by at the tip, and the missing body, and the total number of stops based on the stop signal for each cause output from the stop cause detection circuit 60b. The ratio s of the total number of stop times to the number of times is obtained, and the obtained value is supplied to the read-only memory of the storage circuit 62, that is, the ROM 94. On the other hand, the data conversion unit 92 calculates the number of times of loosening y based on the loosening signal output from the fabric quality detection circuit 60c, and supplies the calculated value to the ROM 94.

ROM 94
The correction amount Δμk0 of the target value of the average value of the final unwinding timing,
The correction amount Δσk0 of the target value of the variation of the final unwinding timing,
The correction amount Δμt0 of the target value of the average value of the arrival timing, and
Correction amount Δσt0 of target value of variation in arrival timing
Is stored as a table as shown in FIG. 4A in accordance with the control algorithms A10 to A13 for each combination of the number of loosening times y and the ratio s of the total number of stops to the total number of stops. .

  The ROM 94 also receives the number of times of loosening y and the ratio s as an address signal, and outputs correction amounts Δμk0, Δσk0, Δμt0, and Δσt0 corresponding to the received address signal to an adder 98 of the arithmetic circuit 66 via an output unit 96. Output.

  The adder 98 adds the correction amounts .DELTA..mu.k0, .DELTA..sigma.k0, .DELTA..mu.t0 and .DELTA..sigma.t0 to the corresponding target values set in the target value setter 64a of the setting circuit, thereby obtaining new target values .mu.k0, .sigma.k0, .mu.t0 and .sigma.t0. Is calculated, and the calculated target value is supplied to the deviation calculator 100 of the arithmetic circuit 66.

  The deviation calculation unit 100 calculates the average values μk and μt and the variations σk and σt of the corresponding timings based on the final unwinding timing and the arrival timing supplied from the flying state detection circuit 60a, respectively, and calculates the calculated values. And the corresponding target values .mu.k0, .sigma.k0, .mu.t0 and .sigma.t0 supplied from the adder 98, and the obtained difference is read by the read-only memory of the storage circuit 62 via the data converter 102 of the arithmetic circuit 66. It is supplied to the ROM 104.

The ROM 104 stores the increase / decrease amount ΔM of the main pressure,
Deviation of the average value of the final unwinding timing (μk-μk0),
Deviation of the variation of the final unwinding timing (σk−σk0),
Deviation of average value of arrival timing (μt−μt0), and
Deviation of variation in arrival timing (σt-σt0)
Are stored as a table as shown in FIG. The ROM 104 also receives the deviation as an address signal, and outputs an increase / decrease amount ΔM corresponding to the received address signal to the addition unit 106 of the arithmetic circuit 66.

  The adding unit 106 adds the current main pressure M supplied from the storage unit 108 and the increase / decrease amount ΔM supplied from the ROM 104, and supplies the added value to the limiter unit 110 of the arithmetic circuit 66.

  When the main pressure supplied from the adding unit 106 is within the upper and lower limit values set in the limit value setting unit 64b of the setting circuit, the limiter unit 110 uses the main pressure from the adding unit 106 as a new main pressure in the line 112. To the pressure controller 68 in FIG. However, the limiter unit 110 outputs the upper limit value when the main pressure from the adding unit 106 exceeds the upper limit value, and outputs the lower limit value when the main pressure has not reached the lower limit value to the line 112 as a new main pressure.

  Accordingly, the pressure controller 68 adjusts the main pressure to a new value. As a result, the weft is inserted so as to satisfy any of the running state, the stationary state of the loom, and the quality of the fabric. The above process is also performed every predetermined number of picks (or every fixed time).

  The new main pressure of line 112 is stored in storage 108 for use as the current main pressure in the next correction process. At the start of the operation of the weft insertion control device, the storage unit 108 stores the target value set in the initial setting unit 64c of the setting circuit 64.

  The table shown in FIG. 4 is an example, and it is preferable that the tables in the ROMs 94 and 104 be subdivided within a range permitted by their storage capacity.

  In this embodiment, control algorithms A10 to A13 for correcting a target value used in an automatic control system based on flight information are used. However, instead of this, similar to the previous embodiment, The control algorithms A1 to A9, which combine flight information, stop information, and quality information, may be used.

It is a block diagram of an electric circuit showing one embodiment of a loom provided with the weft insertion control device of the present invention. It is a block diagram of an electric circuit showing other embodiments of the weft insertion control device of the present invention. FIG. 11 is a block diagram of an electric circuit showing still another embodiment of the weft insertion control device of the present invention. FIG. 4 is a diagram illustrating an example of a data table used in the weft insertion control device in FIG. 3.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 10 Loom 12 Weft 14 Length measuring storage device 18 Weft insertion device 20 Warp 32 Main nozzle 34 Sub nozzle

Claims (8)

It is created by combining flight information including the flight timing indicating the flight state of the weft, stop information indicating the stop state of the loom, and / or quality information indicating the quality state of the woven fabric. A jet loom weft insertion control method, comprising: determining a control condition of an actuator for weft insertion based on a control algorithm for weft insertion, and controlling the actuator based on the obtained control condition. The weft insertion control method according to claim 1, wherein the control condition is obtained by an expert system configured according to the control algorithm. The weft insertion control method according to claim 1, wherein the control condition is obtained by using a data table having data for weft insertion configured according to the control algorithm. Information generating means for generating flight information including a flight timing indicating a flight state of a weft, and stop information indicating a stop state of a loom and / or quality information indicating a quality state of a woven fabric. And means for determining a control condition of an actuator for weft insertion based on a control algorithm for weft insertion created by combining the information, and means for controlling the actuator based on the obtained control condition. , Jet room weft insertion control device. The weft insertion control device according to claim 4, wherein the means for obtaining the control condition is an expert system configured according to the control algorithm. The means for obtaining the control condition is an arithmetic means including a data table having data for weft insertion configured according to the control algorithm, and the control unit performs the control based on information generated from the information generating means and the data. The weft insertion control device according to claim 4, wherein the weft insertion control device is an arithmetic unit for obtaining a condition. Approximate expression using a combination of flight information including a flight timing indicating a flight state of a weft, stop information indicating a stop state of a loom and / or quality information indicating a quality state of a woven fabric. A jet loom weft insertion control method, comprising: determining a control condition of an actuator for weft insertion using the control method; and controlling the actuator based on the obtained control condition. Information generating means for generating flight information including a flight timing indicating a flight state of a weft, and stop information indicating a stop state of a loom and / or quality information indicating a quality state of a woven fabric. And storage means for storing a plurality of approximation formulas for calculating a control condition of an actuator for weft insertion using respective information generated from the information generation means, and the control using the information and the approximation formula. A weft insertion control device for a jet loom, comprising: a calculating means for calculating a condition; and a control means for controlling the actuator based on the calculated control condition.

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