JPH08325897A - Transmission of conditional data on loom of centralized control device of loom - Google Patents

Abstract

PURPOSE: To enable the proper judgment on the side of a central controller by enabling the quick calculation of a proper controlled variable from accumulated data and obtaining information about insufficient conditional data when a conditional data without attaining a required number of data is obtained. CONSTITUTION: When a reading command on the conditional data of a loom is received in a state without attaining the number of data required for calculation, the information that the required number of data is not attained is transmitted to the central controller in a centralized control device for the loom of the type for accumulating a conditional data of the loom on the side of each loom, calculating the conditional data of the loom from the accumulated conditional data, then reading the data into the central controller and transmitting a proper conditional data to the corresponding loom based on the conditional data of the loom on the side of the central controller.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of transmitting status data of each loom in a central control device for a loom.

[0002]

2. Description of the Related Art Weaving control and rotation speed control are control targets of a loom. There are a plurality of conventional techniques described below as the weft insertion control. First, Japanese Patent Application Laid-Open No. 59-71459 discloses that the injection timing and the injection pressure of the weft insertion nozzle are corrected by a control amount proportional to the difference between the average value of the weft thread arrival timing and the reference value. Further, Japanese Patent Application Laid-Open No. 62-222974 discloses that the unwinding timing of the length measuring device is corrected by a control amount proportional to the difference between the average value of the weft arrival timing and the reference value.
In Japanese Patent Laid-Open No. 182448/1988, the variation values of the weft arrival timing (standard deviation, maximum value, minimum value)
It is disclosed that the injection pressure of the weft insertion nozzle is controlled by the difference between the reference value and the reference value. Furthermore, JP-A-3-906
JP-A-52-52 discloses that when a weft stop occurs, a yarn feeding change or the like occurs, the correction amounts of the weft insertion nozzle injection timing, the injection pressure, and the unwind timing of the length measuring device are reset.

Further, there are the following conventional examples of the rotation speed control. Japanese Patent Publication No. 64-3969 discloses
It is disclosed that the rotational speed of the loom is controlled by a control amount that is proportional to the difference between the average value of the weft thread arrival timing and the reference value. Further, Japanese Patent Application Laid-Open No. 1-314759 discloses controlling the loom rotation speed based on the operating rate of the loom and the number of times the loom is stopped per unit.

In the above-mentioned conventional technique, the loom state data to be referred for calculating the control amount is a value representing the control result and needs to be accurate. For example, in weft insertion control of a loom, when a state change on the loom, for example, weft stop or yarn feed change, conventionally, necessary data such as a control amount is calculated including the accumulated data before the change. State data of the loom after the change (average value of weft arrival angle, standard deviation and variation value) could not be immediately obtained.
The average value and standard deviation are calculated by the following equations.

Average value X = (W1 + W2 + ... + Wn) / n W1, W2, ..., Wn ... Status data standard deviation S = √ {(1 / n) × [(W1-X) ² + (W
2-X) ² + ·· + (Wn-X) ² ]}

[0006] That is, when the horizontal insertion condition is changed during the data collection, the population itself is changed.
These values have no effect. In this case, to increase the reliability of the data, the population should be separated.
Therefore, when a change is detected, the accumulated data is discarded,
It is conceivable to output the loom state data when the required number of data has been collected, but it takes time until the data collection is completed, and the control followability becomes poor.

Further, there is a technique of returning the control amount to an initial value when a change such as a stoppage occurs as in the technique of Japanese Patent Laid-Open No. 3-90652, but when the initial value is originally deviated, Since the control device repeats trial and error from the state, it took a considerable time for the control to converge to the optimum state.

On the other hand, in the case of the control system in which the data request signal of the central control unit is output asynchronously with the accumulation period of the state data of the loom, the loom calculated in a state where the accumulated data has not reached the required number of data. When the state data of No. 1 is read by the central control device, the reliability of the control data calculated from the data of those looms becomes low, and proper control becomes impossible.

[0009]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to make it possible to quickly calculate an appropriate controlled variable from accumulated data, and to obtain state data that does not reach the required number of data.
By obtaining the lack information of the state data, the central controller can make an appropriate judgment.

[0010]

According to the present invention, the loom side data is accumulated on each loom side, the loom state data is calculated from the state data, and the loom state data is sent to the central control unit. On the side of the loom centralized control device that sends appropriate control data to each loom asynchronously based on the loom state data, the loom state data is read when the number of data required for calculation is not reached. When the instruction is received, the information indicating that the required number of data has not been reached is transmitted to the central controller.

Here, in addition to the information that the required number of data has not been reached for each loom, the elapsed time (the number of revolutions of the loom such as the number of picks and the like) is shown as state data that is less than one collection cycle until the control data is changed. ) Is sent. The loom state data transmitted to the central control device is a calculated value based on the state data accumulated after discarding the state data accumulated so far when the information indicating that the control data is changed is received.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the structure of a centralized control device 1 for a loom. The central control device 2 is connected to a large number of looms 3 via a data bus 4. Each loom 3 accumulates the state data for a predetermined period, calculates the loom state data from the result, and when receiving a read command from the central controller 2, transmits the loom state data to the central controller 2. To do. The central control device 2 transmits the control data calculated by a predetermined calculation to the corresponding loom 3 based on the transmitted loom state data. Therefore, each loom 3 executes a control target, that is, weft insertion control and rotation speed control, based on the transmitted control data.

By the way, with these controls, the central controller 2
The reason for controlling a plurality of looms 3 is that the control rule according to this control object is related to the woven fabric and its weaving conditions, and further, according to the control result based on the control rule, the control rule is appropriately set. Since it is necessary to make adjustments, if each loom 3 is configured independently, its control rule (data)
This is because it is necessary to set each loom 3 on each loom 3 and the workability is poor, and the cost is high. Therefore, it is convenient to perform this processing collectively by a device that controls the whole.

In this configuration, the central control unit 2 and each loom 3 are
A series of control between and is performed asynchronously with respect to each loom 3 at a predetermined cycle according to the controlled object. For example, in the case of the weft insertion control, quick response is required, so that a short cycle is performed. In the case of the rotation speed control, quick response is not required so much, so that a series of control is performed at a relatively long cycle.

FIG. 2 shows a control system of each loom 3.
This control system is constructed so that the controlled object can be controlled by side-loading control, rotational speed control, or a combination thereof. The weft yarn 5 is a yarn feeder 6 in a knotted state,
It is supplied from 7 and is measured by the length measuring and storing device 8 by a length necessary for the picking of one pick, and is locked and locked by the locking pin 9 until the picking time. The yarn feeding change from the yarn feeding body 6 to the yarn feeding body 7 is detected by the yarn feeding change sensor 30.

At the weft insertion timing, the solenoid 10 retracts the locking pin 9, and the weft insertion nozzle 11 jets a weft insertion fluid into the opening 13 of the warp thread 12 to release the weft thread. 5 is inserted into the opening 13. In the weft insertion process, the multiple auxiliary nozzles 14 further inject the air in the weft insertion direction along the flight path of the weft yarn 5 to further urge the flying weft yarn 5. The wetting fluid is supplied from the pressure source 15 to the wetting nozzle 11 and the auxiliary nozzle 14 via the supply passage 16 and the pressure regulating valves 17 and 18 and the on-off valves 19 and 20, respectively.

The communication terminal 25 is connected to the data bus 4
In addition to being connected to the central control device 2 via the, it is connected to the pressure correction unit 21, the angle correction unit 22, the state data calculator 23, and the loom rotation speed control unit 24, respectively. The pressure correction unit 21 controls the pressure adjusting valves 17 and 18 via the pressure controller 26, and also transmits correction presence / absence data as necessary data to the state data calculator 23.

The angle correction unit 22 controls the opening / closing timings of the opening / closing valves 19 and 20 and the unlocking (retracting) / locking (advancing) timing of the locking pin 9 via the timing controller 27, and also performs correction of Send presence / absence data. The timing controller 27 is connected to an angle detector 28 connected to a main shaft 33 of the loom.

The weft insertion state is detected by the feeler 29 on the weft yarn arrival side, and the weft yarn arrival signal is input to the state data calculator 23 and the loom control circuit 31. The loom control circuit 31 generates a series of control signals for stopping the operation of the loom 3 (stop cause signal). For example, when the weft thread arrival signal from the feeler 29 is not input,
The loom 3 can also be stopped.

The state data calculator 23 includes a pressure correction unit 2
1. Correction presence / absence data from the angle correction unit 22 and the rotation speed control unit 24, a weft yarn arrival signal from the feeler 29, a yarn supply replacement signal from the yarn supply replacement sensor 30, a stop cause from the loom control circuit 31, and the like. A signal and an angle signal from the angle detector 28 are input, and as the loom state data, for example, in the case of weft insertion control, an average value and a variation value of the weft thread arrival angle are calculated and sent to the communication terminal device 25.

The state data calculator 23 stores the state data (specifically, weft arrival angle, the number of stops by cause, the number of picks for weft insertion, and the stoppage) for a predetermined period, for example, unit time or unit picks. The loom state data (that is, the average value of the weft arrival angle, the variation value <standard deviation, the MAX value, the MIN value>, the number of times of stoppage in a predetermined period, the operating rate, etc.) is calculated from the stand time).

For example, during weft insertion control (weft insertion timing control), weft thread arrival angles are collected and an average value of weft thread arrival angles is calculated as the loom state data. Then, when the yarn feed replacement signal from the yarn feed replacement sensor 30 is input, or on the loom or in accordance with a change command of the weft insertion control data (weft insertion timing) from the central control unit 2, the angle correction unit 22 performs correction. When the presence / absence data is output, the state data calculator 23 discards the weft thread arrival angle data collected so far and newly starts this collection,
The average value of the weft arrival angles is calculated and stored for each predetermined cycle.

In addition, during weft insertion control (pressure control),
The state data calculator 23 calculates the average value and the variation value of the weft arrival angle and corrects it from the pressure correction unit 21 on the loom or by a change command of the weft insertion control data (weft insertion pressure) from the central control unit 2. When the presence / absence data is output, the state data calculator 23 similarly discards the accumulated data and newly starts collecting weft yarn arrival angle data,
The average value and variation value of the weft arrival angle are calculated and stored for each predetermined period.

During the loom rotation speed control, the state data calculator 23 calculates the operating rate and the number of stops, and the rotation speed control section 24 calculates the loom rotation speed or a loom rotation speed change command from the central control unit 2. When the correction presence / absence data is output from the state data calculator 23, the state data calculator 23 discards the state data such as the number of stoppages for each loom cause, the number of pick-up picks, and the stoppage time accumulated in a predetermined period, and newly writes these Is started, and the operation rate and the number of stoppages are calculated and stored.

When the loom status data read command from the communication terminal 25 is received, the status data calculator 23
Outputs the stored data to the communication terminal device 25, and is transmitted to the central control device 2 via the communication terminal device 25.

Next, FIG. 3 shows a data transmission format between the central control unit 2 and a specific loom 3. A is a read instruction of the loom state data given from the central control device 2 to the loom 3, B is a transmission state of the loom state data given from the loom 3 to the central control device 2,
C indicates the transmission state of control data from the central control device 2 to the loom 3, and D indicates information on the elapsed time from the start of data collection given to the central control device 2 from the loom 3 (the loom such as time and number of picks). The number of rotations) is transmitted. In normal control, communication is performed in the order of A → B → C. However, if, for example, a change in yarn supply occurs and the required number of data is not accumulated on the loom 3 side, A → D.
Communicate in the order of (B) → C.

Next, FIG. 4 shows the order of the loom state data transmission method. When the central controller 2 reads out the loom state data at every predetermined cycle according to the control target, it issues a loom state data read command to the specific loom 3. When the read command is received via the communication terminal device 25, the state data calculator 23 of the loom 3 determines whether the state data accumulated in the next step has reached the required number of data. When the required number of status data are accumulated, that is, when Yes,
The state data calculator 23 calculates the loom state data such as the variation value of the weft insertion arrival timing and the average value from the state data, and transmits the calculated loom state data to the central control device 2 via the communication terminal device 25. Then, the normal transmission is completed. When the number of accumulated state data has not reached the required number of data in the determination step, that is, No, the state data calculator 23 determines in the next step that the required number of data has not been reached. Information such as pick number data is sent to the central control unit 2 via the communication terminal 25, and if necessary, the loom state data is calculated based on the state data accumulated in the next step, and the calculated value is calculated. By transmitting to the central control unit 2 via the communication terminal 25,
A series of control ends.

Based on these state data, the central controller 2 obtains optimum control data for the loom 3 by a predetermined calculation, and sends the obtained control data to the corresponding loom 3. That is, the central controller 2 performs a process of calculating control data from the read loom state data and transmitting the control data to the loom 3.

For example, in the case of horizontal insertion control (horizontal insertion timing control), Japanese Patent Publication No. 6-33540 of the prior art.
Control data calculation process, that is, the loom 3
The central controller 2 performs a process of calculating the control data (corrected weft insertion timing) by a predetermined calculation according to the deviation (control amount) of the average value of the weft yarn arrival angles read from.

If the central control unit 2 receives the information indicating that the required number of data has not been reached, the central control unit 2 can calculate an appropriate control amount by adopting a control data calculation method different from usual. . This is because the control amount can be calculated based on the weft insertion pick number sent at this time in consideration of the reliability of the loom state data and the weight corresponding to the weft insertion pick number. From the above,
The loom 3 will newly perform control based on the control data calculated and transmitted by the central control device 2.

The central control unit 2 is, as shown in FIG.
In addition to the selected loom 3, a plurality of looms 3 are further connected. By performing the same processing on these looms 3, it is possible to control a plurality of looms at the same time.

As described above, the state data calculator 23 of the specific loom 3 transmits the loom state data which is less than one collection period after the control data is changed, in addition to the information that the required number of data has not been reached. To do. Here, the information indicating that the required number of data has not been reached is the elapsed period (time, number of loom revolutions such as the number of picks) from the start of data collection, and the loom state data to be transmitted at this time is as described above. It is a calculated value based on the accumulated state data, for example, an average value or a dispersion value of the weft arrival angle, the number of stoppages, an operating rate, and the like.

The control target of the central controller 2 is, as described above, the weft insertion control of each loom 3 (unlocking timing control of the length measuring storage device, injection timing control of the weft insertion nozzle, weft insertion nozzle injection pressure). Control), rotation speed control of the loom, or combination control of weft insertion control and rotation speed control.

Table 1 below shows the conditions for recalculating the loom state data for these controls, the state data to be transmitted at normal times, and the information to be transmitted when the required number of data is not reached.
It is as shown in the table.

[0035]

[Table 1]

The specific control mode is as follows. (1) Control of the unwinding timing of the length measuring and storage device and the injection timing of the weft insertion nozzle When the loom 3 receives a command to read the loom state data from the central control unit 2 in normal times, the weft thread is calculated as the weaving state data. Send the average value of the arrival angle. When the loom 3 receives a command to read the loom state data when there is no accumulated data of the number of picks necessary for calculation after changing the yarn feeding, unwinding timing, and jetting timing, the loom 3
Transmits only the information indicating that the accumulated data has not reached the required number (for example, YES / NO, or the accumulated data number), or at the same time, transmits the average value of the weft yarn arrival angles calculated in that state. .

(2) Control of Injection Pressure of Weft Inserting Nozzle When a loom 3 receives a command to read the loom state data from the central control unit 2 in a normal state, the average value and the variation value of the weft thread arrival angle calculated ( Standard deviation, at least one of the maximum value and the minimum value). When a read command of the loom state data is received in the state where there is no accumulated data of the number of picks necessary for calculation after changing the yarn feeding, changing the timing, and the pressure, the loom 3 reaches the required number of accumulated data. Information indicating that it is not (for example, YES / N
O, or the number of accumulated data) is transmitted, or the loom state data calculated in that state is transmitted together with these information.

(3) Combined control of the timing control of (1) and the pressure control of (2) For example, when the timing control is executed in a short cycle and the pressure control is executed in a long cycle, the control amount is calculated. The accumulation period of the state data (average value) used may be different. For example, when the read command of the status data for timing control and the status data for pressure control is received in a state where the accumulated data for pressure control is less than the required number, and when the data for pressure control is transmitted, the above (2) You may transmit the data to that effect.

(4) Loom rotation speed control When the loom operating rate is used as the loom operating state data in addition to the state data of (3) above, that is, the average value and the variation value of the weft thread arrival angle, the loom operating rate is It changes with the driving time of 3. That is, until the operator repairs
If the loom 3 is stopped for a long time, the operating rate becomes low. In this case, if the number of operating picks required for calculating the operating rate has not reached a predetermined value, by transmitting the information to that effect, the number of revolutions will not be lowered more than necessary.

In the conventional example of FIG. 5 showing the embodiment of the weft insertion control (injection timing control), even when a yarn feeding change occurs and a sudden change in the control amount is predicted, the state data is collected for a predetermined time. Or after accumulating over the number of picks,
Since the central controller 2 starts calculation of a new controlled variable,
It takes a long time for the weft insertion (injection timing) control to reach an appropriate weft insertion state for the new weft yarn 5 after the yarn feeding is changed. On the other hand, according to the method of the present invention shown in FIG. 5, when the yarn feeding change occurs, the loom 3 discards the state data accumulated so far, starts accumulating the state data again, and then the center At the time of reading the loom state data, the control device 2 reads that the collection of the state data has not reached a predetermined time or the number of picks, and reads the new loom state data calculated based on the state data accumulated thereafter, and based on it. Since the loom 3 is controlled by the control data, the weft insertion control is promptly corrected to the injection timing of the weft insertion nozzle corresponding to the new yarn feeding, and as a result, the target weft yarn arrival angle is reached. It becomes faster than the conventional one.

As an example in which the central control device controls a plurality of looms as described above, weft insertion control and loom rotation speed control have been raised, but in addition to this, for example, the following control can also be performed. (1) Warp thread tension control The warp thread tension is changed according to the number of warp stops, the operating rate, the average value and the dispersion value of the weft thread arrival angle. (2) Opening control The opening timing and opening curve of the opening device are changed according to the average value and variation value of the warp yarn arrival angle, the number of weft stops, and the like.

These controls are appropriately executed based on the control cycle according to the controlled object. These controls may be carried out individually or a plurality of them may be carried out in combination, and there is no particular limitation.

[0043]

According to the present invention, the following effects can be obtained. It is possible to send the loom state data calculated from the data accumulated after changing the control data and the information indicating that the number of data required for the calculation has not been reached. The control can be converged to. Therefore, the overrun of control due to incorrect calculation of the control amount and the induction of the loom stop caused by the delay in the loom state data calculation and the long settling time are eliminated, and the operating rate of the loom is improved.

[Brief description of drawings]

FIG. 1 is a block diagram of a loom centralized control device.

FIG. 2 is a block diagram of a control system of the loom.

FIG. 3 is an explanatory diagram of a communication situation between the central control device and each loom.

FIG. 4 is a flowchart of a loom state data transmission state on the loom side.

FIG. 5 is a comparative explanatory diagram of conventional weft insertion control and weft insertion control by the method of the present invention.

[Explanation of symbols]

 1 Loom centralized control device 2 Central control device 3 Loom 4 Data bus 5 Weft yarn 6 Yarn feeder 7 Yarn feeder 8 Length measuring storage device 9 Locking pin 10 Solenoid 11 Weft insertion nozzle 12 Warp yarn 13 Opening 14 Auxiliary nozzle 15 Pressure source 16 Supply path 17 Pressure adjustment valve 18 Pressure adjustment valve 19 Open / close valve 20 Open / close valve 21 Pressure correction unit 22 Angle correction unit 23 State data calculator 24 Loom rotation speed control unit 25 Communication terminal 26 Pressure controller 27 Timing controller 28 Angle detector 29 Feeler 30 Refeeding sensor 31 Loom control circuit 32 Spindle motor 33 Spindle

Claims (4)

[Claims] 1. A central control unit is configured to control a plurality of looms, each loom accumulating state data for a predetermined period,
The loom condition data is calculated from the accumulated condition data, and the loom transmits the loom condition data to the central controller in response to a read command of the loom condition data issued by the central controller to the central controller. The device transmits control data calculated based on the transmitted loom state data to the corresponding loom, and the loom controls by the transmitted control data. In a loom centralized control device in which a series of control operations are performed asynchronously, when a loom status data read command is received while the number of data required for calculation has not been reached, information indicating that the required number of data has not been reached is displayed. A method for transmitting the loom state data of a central control device for a loom, characterized by transmitting the data to a central control device. 2. The loom according to claim 1, wherein, in addition to the information indicating that the required number of data has not been reached, each loom transmits the loom state data which is less than one collection period after the control data is changed. Method for transmitting loom condition data of a centralized control device. 3. The method for transmitting loom state data of a central control device for a loom according to claim 1, wherein the information indicating that the required number of data has not been reached is a period elapsed from the start of data collection. . 4. The loom status data to be transmitted to the central control unit, when the information indicating that the control data is changed is received, the status data accumulated so far is discarded, and the calculated value based on the status data accumulated thereafter. The method for transmitting the loom state data of the centralized control device for the loom according to claim 1.